Abstract: A wireless communication board comprises: a communication board; a wireless communication part disposed on the communication board; a power supply provided on the communication board and configured to supply a power source to the wireless communication part; a surface mounting pad that is connected to the wireless communication part and power supply and disposed on a main board by means of the surface mounting technology; and a wire connection connected to the wireless communication part and power supply and connected to the main board by means of a wire, wherein the main board comprises a main processor for controlling the operation of an electronic device.

Abstract: A refrigeration system and a control method of the refrigeration system are provided. The refrigeration system includes a cooling circuit and a compressor, an evaporator assembly, and a condenser assembly sequentially arranged on the cooling circuit, and the refrigeration system further includes: a liquid pump cooling assembly, arranged on the cooling circuit and located between the condenser assembly and the evaporator assembly, the liquid pump cooling assembly includes a housing and a liquid pump arranged in the housing, the housing defines a cavity having a liquid reserving function, a refrigerant inlet, a first outlet connected to the cavity and a second outlet connected to the liquid pump, an outlet of the condenser assembly is in connected with the refrigerant inlet, and both the first and second outlets are connected with an inlet of the evaporator assembly; a control assembly, connected with the compressor and the liquid pump.

Abstract: An energy storage system converts variable renewable electricity (VRE) to continuous heat at over 1000° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. An array of bricks incorporating internal radiation cavities is directly heated by thermal radiation. The cavities facilitate rapid, uniform heating via reradiation. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. Gas flows through structured pathways within the array, delivering heat which may be used for processes including calcination, hydrogen electrolysis, steam generation, and thermal power generation and cogeneration. Groups of thermal storage arrays may be controlled and operated at high temperatures without thermal runaway via deep-discharge sequencing. Forecast-based control enables continuous, year-round heat supply using current and advance information of weather and VRE availability.

Abstract: Embodiments of systems and methods for configuring an Information Handling System (IHS) using a kickstand are described. In some embodiments, an IHS may include a processor and a memory coupled to the processor, the memory having program instructions stored thereon that, upon execution, cause the IHS to identify a state of a kickstand coupled to the IHS and configure the IHS, at least in part, based upon the state.

Abstract: A method for heat dissipation control of a charging base is applied to a terminal device, and includes: receiving a trigger message configured to represent a wireless communication connection between the terminal device and the charging base; displaying an interaction interface for heat dissipation control according to the trigger message; and sending a control instruction corresponding to the selection information to the charging base based on selection information generated in response to acting on the interaction interface for heat dissipation control. An apparatus for heat dissipation control of a charging base, a terminal device and a charging base for charging the terminal device are also disclosed.

Abstract: A disclosed method of determining operating states of a fan uses a digital image of the fan and at least one operating parameter-specific algorithm. In a first stage, the method includes generating the digital image of the fan as a representation of the fan's properties, the representation based on one or more mathematical calculation models and optionally known data. The method further includes generating the at least one operating parameter-specific algorithm based on at least one of known relationships and characteristic curves, and calculating component states of the fan via the digital image, wherein the calculation of component states is based on virtual sensors. The method further includes generating a system behavior algorithm that calculates operating parameters of the fan based on the component states and optionally generates predictions relating to the operation of the fan.

Abstract: The application relates to an electrical vehicle charging system for charging an electrical vehicle with a DC current, including a charger, an air conditioning device and a control device, whereby the charger is configured for delivering the DC current to the electrical vehicle, the air conditioning device is configured for heating and/or cooling the charging system, the air conditioning device and/or the charger emits a noise, and the control device is configured for controlling delivery of the DC current according to the noise.

Abstract: A microcomputer calculates a predicted CPU ambient temperature which predicts an ambient temperature in the future by using a heat generation amount of a drive, an outside air temperature detected by an outside air temperature sensor, and a CPU ambient temperature detected by a CPU ambient temperature sensor. The microcomputer controls a rotation number of the fan on the basis of the predicted CPU ambient temperature so that a junction temperature of a CPU does not exceed a temperature-specification upper limit value.

Abstract: Provided is a sensor including a sensor electrode unit including: a sensing unit of a capacitance type that detects pressing; and a temperature detection sensing unit of a capacitance type provided in an area corresponding to the sensing unit.

Abstract: A merchandiser for storing refrigerated product for purchase by a customer is provided. The merchandiser includes a housing defining a cavity; an opening defined by the housing, the opening providing access to the cavity; a door coupled to the housing and movable between a first position and a second position, wherein the door covers the opening in the first position and the door is positioned away from the opening in the second position such that the cavity is accessible; a lock coupled to the door, the lock actuable between a locked position and an unlocked position, wherein the lock is configured to lock the door in the first position in the locked position; and a controller coupled to the lock, the controller configured to actuate the lock to the unlocked position in response to receiving an unlock signal from a remote device.

Abstract: A refrigerant detection assembly for detecting moderate-to-low GWP value refrigerants, an air conditioning system for incorporating the same, and a method of detecting refrigerant leaks using the refrigerant detection assembly are provided. The refrigerant detection assembly may be disposed proximate to an indoor heat exchanger. The refrigerant detection assembly includes a nondispersive infrared (NDIR) sensor, a fan disposed adjacent to the nondispersive infrared sensor, the fan configured to direct a sample to the nondispersive infrared sensor, and a controller operatively connected to the nondispersive infrared sensor and the fan. The controller is configured to operate the fan in constant operation and trigger a response when the refrigerant detection assembly detects at least 25% lower flammability limit (LWL) in the sample.

Abstract: According to one general aspect, an apparatus may include a memory storage device. The memory storage device may include a plurality of memory cells configured to store data. The memory storage device may include a first temperature sensor configured to detect a temperature of the memory cells. The memory storage device may include an artificial intelligence system configured to dynamically determine a thermal management setting to be employed by the memory storage device, based, at least in part, upon the first temperature sensor and a workload of the memory storage device. The memory storage device may dynamically changes a set of operational parameters in response to the thermal management setting determined by the artificial intelligence system.

Abstract: An example apparatus comprising a heat dissipation mechanism and a controller to detect a temperature of a surface of the apparatus, in response to detecting that an audio output device is connected to the apparatus, determine a thermal profile, and instruct the heat dissipation mechanism to dissipate heat from the apparatus based on the thermal profile.

Abstract: A method of controlling an HVAC circuit, comprises allowing refrigerant to circulate within the HVAC circuit, wherein the HVAC circuit comprises an evaporator coil, a condenser coil, at least one fan configured to provide airflow to the condenser coil, at least one expansion valve, and at least one compressor. The method continues by receiving a temperature measurement and determining based on the temperature measurement, a minimum fan speed configured to avoid pressure spikes within the condenser coil. The method concludes by sending a signal to the at the least one fan to direct the at least one fan to spin at a rate greater than or equal to the minimum fan speed when the measured temperature is less than a predetermined temperature, wherein, when the refrigerant circulates through the condenser coil, the minimum fan speed is greater than zero rotations per minute.

Abstract: A water heater system and method of operating such a system are disclosed herein. In an example embodiment, the water heater system includes a heat exchanger. a heat source inlet by which heated heating fluid can be provided to the heat exchanger, a heat source outlet by which cooled heating fluid can be communicated from the heat exchanger, a water supply inlet by which supply water can be provided to the heat exchanger, and a water supply outlet by which heated water can be communicated from the heat exchanger. Additionally, the system includes a controller, a water supply outlet temperature sensor, a water supply flowmeter, and an actuator. The controller is configured to generate control signals based at least indirectly upon temperature measurements and flow measurements and to provide the control signals to the actuator to regulate a fluid flow of the heated heating fluid into the heat exchanger.

Abstract: An environmental control system for a building in a geographic location and having a heating, ventilation and air-conditioning (HVAC) system includes at least one computer-readable medium having instructions stored thereon that, when executed by at least one processing device in communication with the external application, enables the at least one processing device to receive weather data characterizing a weather forecast over a predetermined time period for the geographic location, receive free-cooling window data, determine, based on the weather data and free-cooling window data, an available free-cooling time window, and issue to the external application an executable command to the HVAC system to enter free-cooling mode during the available free-cooling time window.

Abstract: A system and a corresponding method of correcting temperature data from a non-imaging optical sensor involve collecting temperature data generated using the optical sensor. The temperature data describes temperature changes across a surface of a material during an additive manufacturing operation in which the material is heated by a heat source. The method includes estimating a size of a hot spot corresponding to a hottest region formed on the surface by the heat source; and estimating a size of a heated region corresponding to a locus of points within the field of view that contribute to the temperature data. The method further includes correcting the temperature data based on the estimated sizes of the hot spot and the heated region.

Abstract: In an example, a method includes measuring a temperature of a plurality of regions of a layer of build material in an additive manufacturing apparatus to provide initial temperature values. For each of a plurality of regions which comprise build material which is intended to fuse, an average temperature value of a plurality of neighbouring regions may be determined and the initial temperature values may be replaced with the average temperature value. Based on the replacement temperature values, a representative temperature of an area of the layer of build material may be determined and a heat source may be controlled based on the representative temperature.

Abstract: In a control device for a steering mechanism, the steering mechanism includes a motor that includes a plurality of coils. The plurality of coils include a first coil and a second coil. The control device includes a first control system and a second control system configured to compute a command value for torque of the motor to be applied to the steering mechanism. The first control system and the second control system are each configured to control power supply to the plurality of coils of the motor based on the command value. The first control system includes a first microcomputer that has first characteristics, and the second control system includes a second microcomputer that has second characteristics that are different from the first characteristics.

Abstract: The present disclosure relates to the field of air conditioning technology. In particular, it involves a control method and control device based on a DC variable speed AC compressor.

Abstract: A control method of an air conditioner includes detecting an indoor ambient temperature value under a rapid cooling operation mode, judging whether the indoor ambient temperature value is greater than a preset temperature value, and in response to the indoor ambient temperature value being greater than the present temperature value, determining an operation temperature interval including the indoor ambient temperature value, determining a rapid cooling rotating speed value of an indoor fan of the air conditioner corresponding to the operation temperature interval, and controlling the indoor fan to operate according to the rapid cooling rotating speed value. The rapid cooling rotating speed value is greater than a highest preset rotating speed value of the indoor fan.

Abstract: The invention relates to a device for cooling workpieces. The device has at least one nozzle which is configured to blow a fluid onto a workpiece. At least one surface temperature sensor is able to be arranged on the workpiece. In order to cool the workpiece, it is blown with a fluid by means of the at least one nozzle, the temperature of said fluid being lower than the surface temperature of the workpiece. In the process, the surface temperature is monitored by means of the at least one surface temperature sensor.

Abstract: A cooling system for a high voltage electromagnetic induction device, includes: at least one duct filled with a first coolant and surrounded by a second coolant, each being routed along a direction of natural convection; at least one group of fans, each fan of the group being mounted along a respective duct of the at least one duct along the direction of natural convection and being configured to blow for the-second-coolant-forced cooling; at least one group of electric motors, each electric motor being configured to operate a respective fan of the at least one group of fans; at least one group of switches, each switch being configured to control a respective electric motor of the at least one group of electric motors. A method of cooling a high voltage electromagnetic induction device is also provided. By using the option of operating fans with higher cooling rate, because of the less fans are operating, the predetermined cooling capacity can be reached with lower power consumption.

Abstract: A device may receive a thermal report from a user equipment. The thermal report may indicate a temperature of the user equipment. The device may determine, based on the thermal report, whether the temperature of the user equipment satisfies a temperature threshold. The device may select a network action to reduce the temperature of the user equipment based on the temperature of the user equipment satisfying the temperature threshold. The device may perform the network action.

Abstract: Because the touch temperature of a wearable computing device (“WCD”) may be an insignificant factor for user experience when the WCD is not being worn by a user, embodiments of the solution seek to modify thermal management policies based on an inferred user proximity state. Exemplary embodiments monitor one or more signals from readily available sensors in the WCD that have primary purposes other than measuring user proximity. Depending on embodiment, the sensors may be selected from a group consisting of a heart rate monitor, a pulse monitor, an O2 sensor, a bio-impedance sensor, a gyroscope, an accelerometer, a temperature sensor, a pressure sensor, a capacitive sensor, a resistive sensor and a light sensor. Using the signals generated by such sensors, relative physical proximity of the WCD to a user may be inferred and, based on the user proximity state, thermal policies either relaxed or tightened.

Abstract: An apparatus can include a first adaptive filter, a second adaptive filter, a filter, and a third adaptive filter. The first adaptive filter can be configured to determine an estimated magnitude of a control signal associated with a control measure based on a magnitude of a signal from a sensor, wherein the signal is indicative of operating temperature of a memory system. The second adaptive filter can be configured to determine an estimated operating temperature based on a magnitude of the control signal. The filter can be configured to determine a change magnitude of the control signal based on a difference between the magnitude of the signal from the sensor and a threshold operating temperature. The third adaptive filter can be configured to determine a throttle rate at which to apply the control signal based on a change magnitude of the control signal.

Abstract: A data storage system can be vigilant of the acoustic impedance between cooling features and a data storage device to prevent operational degradation in the data storage device as a result of cooling operations from the cooling features. One or more cooling feature may each be positioned on an opposite sides of an air plenum from a data storage device with each cooling feature connected to a cooling module configured to adjust a speed of the first cooling feature in response to a detected operational condition in the data storage device. The cooling features speed adjustment is executed independently to correct an acoustic and vibration disturbance interference in the data storage system.

Abstract: A thermostat includes a microprocessor operatively coupled to and adapted to control a HVAC system. The thermostat also includes a wireless transceiver operatively coupled to the microprocessor and adapted to communicate with wireless routers. The thermostat is adapted to be placed into a listen mode, connect with a remote input device in a direct wireless connection while in the listen mode, receive a Wi-Fi password from the remote input device for accessing a first Wi-Fi wireless network over the direct wireless connection, be disconnected from the remote input device after the Wi-Fi password is received, detect a set of available networks accessible over the wireless transceiver, attempt to login to the set of available networks with the Wi-Fi password, successfully connect to the first Wi-Fi wireless network using the Wi-Fi password, and transmit device information of the thermostat over the first Wi-Fi wireless network to a cloud server.

Abstract: An information handling system may include a processor, a proximity sensor configured to determine whether a user of the information handling system is proximate to the information handling system, an air mover configured to cause movement of gaseous fluid within the information handling system in order to thermally cool one or more components of the information handling system, and an air mover control system configured to receive a signal from the proximity sensor indicative of whether the user is proximate to the information handling system and control a speed of a motor of the air mover based on whether the user is proximate to the information handling system.

Abstract: The present invention relates to a control program execution method. According to one embodiment of the present invention, the control program execution method performed in a terminal device in which a lower control program for managing a device to be controlled and/or an upper control program for executing the lower control program are installed comprises the steps of: receiving an input of an execution request for the upper control program from a user; searching for the device to be controlled, by the upper control program executed on the basis of the execution request; searching for the lower control program corresponding to identification information of the searched-for device to be controlled, by using the identification information; and connecting communication between the searched-for lower control program and the device to be controlled, wherein the lower control program is sequentially executed after the upper control program is executed.

Abstract: A system and method for robotically arbitrating cloud computing services utilizes resource parameters, tolerance values, and client system requirements to configure a meta-orchestrator to select a validated compatible service from a service resource pool and employ an orchestrator to migrate a client system to the selected service and utilize block chain technology for logging transactions, storing metadata and data.

Abstract: A method and system for calculating an estimated future indoor air temperature for a building receives information about the building, information about environmental conditions, and thermostat set point information, determines, using a processor, thermodynamic properties of the building based on the received information about the building, and calculates the estimated future indoor air temperature using the determined thermodynamic properties of the building, the received information about environmental conditions, and the received thermostat set point information.

Abstract: An air curtain canister for creating an air curtain includes a housing having a form factor approximating an exterior of a data storage drive. The air curtain canister also includes a fan for creating an airflow in the housing and a nozzle for directing the airflow exiting the housing in a predefined trajectory for creating an air curtain. A data storage library includes an array of drive slots each configured to receive a data storage drive therein. The data storage library also includes a plurality of air curtain canisters positioned laterally in the array of drive slots for creating an air curtain across a front of the remaining drive slots in the array. A method includes selectively instructing air curtain canisters in a data storage library to create an air curtain across a front of an array of drive slots in the data storage library.

Abstract: A method determining adverse events from operation of an implantable blood pump including calculating a moving average convergence divergence (MACD) based on power consumed by the implantable blood pump to maintain a constant rotational speed of an impeller of the implantable blood pump. An alert is generated when the calculated MACD diverges from a predetermined MACD threshold and a predetermined MACD zero-crossing time threshold.

Abstract: An ice merchandiser for storing bagged ice for purchase by a customer is provided. The ice merchandiser includes a payment system structured to enable a patron to facilitate a bagged ice product transaction at the ice merchandiser, and an access control system structured to selectively provide access to the ice merchandiser during the bagged ice product transaction based on the payment system providing an indication that payment for the ice product has been validated.

Abstract: An apparatus for analyzing the condition of a machine having a part rotatable with a speed of rotation, includes an input for receiving an analogue measurement signal indicative of a vibration signal signature having a vibration frequency and a repetition frequency; an A/D converter for generating a digital measurement signal dependent on the analogue measurement signal, the digital measurement signal having a first sample rate, which is at least twice the vibration frequency; an enveloper for generating an enveloped signal indicative of the repetition frequency; a decimator for generating a decimated first digital signal dependent on the enveloped signal such that the decimated first digital signal has a reduced sample rate; an enhancer having an input for receiving the decimated signal, wherein the enhancer operates in the time domain to perform discrete autocorrelation for the decimated first digital signal so as to generate an enhancer output signal sequence; and an analyzer for performing a condition

Abstract: Systems and techniques are described for alerting individuals of HVAC system issues in their home. In some implementations, a monitoring system monitors a property that includes sensors located throughout the property and generates sensor data. A monitor control unit receives thermostat data from a thermostat that indicates activity of the HVAC system and temperature history of the property. The monitor control unit applies the thermostat and the sensor data to an HVAC model that is trained using past sensor data, past thermostat data, past errors of the HVAC system. The monitor control unit determines an error of the HVAC system from the HVAC model output. The monitor control unit determines an action for correcting the error of the HVAC system. The monitor control unit provides, for output, data identifying the error of the HVAC system and the action for correcting the error of the HVAC system.

Abstract: An extremum-seeking control system for a plant includes a feedback controller for operating the plant to achieve a value of a manipulated variable, and an extremum-seeking controller. The extremum-seeking controller is configured to provide the value of the manipulated variable to the feedback controller and to determine a value for the manipulated variable. The extremum-seeking controller determines the value for the manipulated variable by perturbing the manipulated variable with an excitation signal and monitoring a performance variable of the plant resulting from the perturbed manipulated variable, estimating a normalized correlation coefficient relating the performance variable to the manipulated variable, and modulating the manipulated variable to drive the normalized correlation coefficient toward zero using a general set of tuning parameters. The general set of tuning parameters are adapted for use with the normalized correlation coefficient, independent of a scale of the performance variable.

Abstract: Systems and methods for managing electrical load control events in an electric power grid are disclosed. A server processor is operable to generate an energy consumption profile for each of the plurality of service points. Each energy consumption profile comprises energy consumption information for a plurality of controllable energy consuming devices. The server processor selects at least one service point from the plurality of service points based on a predetermined criterion and sends at least one load control event to the at least one service point in response to an energy reduction request. The server processor determines an energy saving resulting from the at least one load control event at the at least one service point. The energy saving is determined based on a monetary supply equivalent value for each of the plurality of controllable energy consuming devices.

Abstract: A system includes a plurality of programmable intelligent thermostats positioned within at least one of a first home environment and a second home environment, a plurality of communication devices configured to operate an electronic media sharing application, and at least one server configured to communicate with the plurality of programmable intelligent thermostats and the plurality of communication devices via a wireless network. A user initiates the electronic media sharing application on at least one of the plurality of communication devices. A touch-screen display of the at least one communication device demonstrates the plurality of programmable intelligent thermostats positioned within the first and second home environments and at least one user-selected electronic media is simultaneously uploaded to at least one of the plurality of programmable intelligent thermostats responsive to a user selection of a region on the touch-screen display.

Abstract: A central air conditioning system includes dampers individually air conditioning multiple spaces, an air conditioning controller controlling the dampers, a temperature sensor disposed in each space to detect a temperature, and a temperature predictor that receives the detected temperature, predicts a temperature in each space, and transmits temperature information to the air conditioning controller. The temperature sensor may wirelessly transmit the detected temperature when an amount of change in temperature gradient exceeds an allowable range. Alternatively, the temperature sensor may predict a temperature based on a temperature gradient, and wirelessly transmit the detected temperature when a difference between the predicted and detected temperatures exceeds a certain range. Alternatively, the temperature sensor may predict a temperature by using one of prediction formulae, and transmit the detected temperature when a difference between the predicted and detected temperatures exceeds a certain range.

Abstract: An electronic device, which includes a host, and a storage device receiving a command from the host. The storage device processes the received command and returns, to the host, a command response indicating a result of processing the received command, and the command response includes information about an internal temperature of the storage device.

Abstract: A method and an apparatus for detecting a road hazard are provided. The method includes acquiring one or more sensor data from one or more sensors. The method further acquires traffic reference information and compares the one or more sensor data with the traffic reference information. A road hazard can be identified based on a comparison result between a first sensor data and the traffic reference information. Further, other sensor data are annotated to be associated with the road hazard. The other sensor data are collected within a same time frame in which the first sensor data captures the road hazard. The first sensor data that captures the road hazard and the other sensor data that are associated with the road hazard is output to a machine learning algorithm. The machine learning algorithm is trained based on the sensor data and deployed to identify a similar road hazard thereafter.

Abstract: A method for determining the temperature of an electrically heatable catalytic converter having an electric heating element that includes a heating resistor, the electrical resistance of which changes as a function of the component temperature of the electrically heatable catalytic converter. This resistance is determined from the current intensity and the voltage at the electrically heatable catalytic converter, and is used to determine the component temperature of the catalytic converter, based on a characteristic curve stored in the control unit. The energization of the heating resistor for determining the component temperature takes place in each case for only a short time in order to minimize the energy input into the heating resistor and thus avoid overheating of the heating resistor. In addition, by use of the short time interval, the aim is to minimize the energy requirements for determining the component temperature of the electrically heatable catalytic converter.

Abstract: A system for increasing data retention time can include a processor to execute code to detect or predict a write event associated with a flash memory. The processor can also control a device to cause a temperature at the flash memory to increase via waste heat in response to the write event. Additionally, the processor can write data to the flash memory at the increased temperature to increase the retention time of the data stored in the flash memory.

Abstract: An electronic device is provided, including a processor, a graphics processing unit, a first temperature sensor, a second temperature sensor, an embedded controller and a memory. The first temperature sensor detects the temperature of the processor. The second temperature sensor detects the temperature of the graphics processing unit. The embedded controller increases the current fan speed according to a temperature change of the processor, a temperature change of the graphics processing unit, and/or a change of an operating state of the graphics processing unit. When the temperature of the processor rises to a first predetermined value, the temperature of the graphics processing unit is raised and the operating state of the graphics processing unit is changed, and the embedded controller increases the current fan speed according to a first speed table corresponding to the graphics processing unit stored in the memory.

Abstract: A method for controlling cooling system of a power equipment and a system using the same. The method includes steps of: obtaining a first data set representing operational cost related parameters specific to the power equipment and its cooling system at a series of time intervals of a first load cycle in a history profile; obtaining a second data set representing operational cost related parameters specific to the power equipment and its cooling system at a series of time intervals of a second load cycle in the history profile, establishing a third data set, establishing a fourth data set; establishing a fifth data set; establishing a sixth data set; and controlling the cooling system to operate at a series of time intervals of the present load cycle at the stablished cooling capacity parameters concerning the present load cycle represented by the sixth data set.

Abstract: An apparatus includes a temperature sensor, a pressure sensor, a communication interface, and a hardware controller. The hardware controller may detect a door open and close event for a refrigeration unit and receives temperature readings from the temperature sensor and pressure readings from the pressure sensor. The hardware controller determines whether a performance level of the seal has fallen below a threshold level based on the temperature and pressure readings and transmits a signal through the communication interface responsive to a determination that the performance level of the seal has fallen below the threshold level.

Abstract: Systems and methods for cooling a power generation working fluid are disclosed that reduce the amount of cooling fluid used. These systems and methods save on water usage in the generation of power by thermoelectric power generation systems.

Abstract: A method of detecting a disruption in a diurnal rhythm of a patient having an implantable blood pump comprising calculating a moving average convergence divergence (MACD) based on power consumed by the implantable blood pump to maintain a constant rotational speed of an impeller of the implantable blood pump and generating an alert when the calculated MACD does not cross a MACD zero line for a predetermined MACD zero line crossing time threshold.