Abstract: A battery system can provide backup power for information technology (IT) equipment. In response to a lithium ion based battery being inactive (not charging or discharging), a temperature of the battery can be maintained at or below an optimal storage temperature of the battery, using a primary cooling system. If the primary cooling system is insufficient, the temperature can be maintained at or below the optimal storage temperature with a secondary cooling system that runs in addition to the primary system. The optimal storage temperature of the battery is determined based on an effort to cool the battery and a degradation of the battery.

Abstract: An in-situ dynamic settlement test bench and method for the foundation soil is provided. The in-situ dynamic settlement test bench includes a vibration table system, a sensor embedded in the foundation soil, and a water injection trench around the foundation soil. A horizontal vibration load is applied to the lower foundation soil at an in-situ testing site by means of a vibration table, and the dynamic response of the foundation soil is measured through the sensors embedded in different positions, to reflect the seismic settlement deformation of the soil body. Dynamic settlement tests on soils include indoor dynamic simple shear, triaxial and torsional shear tests. A method is proposed for measuring the dynamic response and settlement deformation of the foundation soil by using a vibrator's vibration action on an in-situ soil column. Measurements of the acceleration response and seismic settlement deformation are taken for the foundation soil under in-situ condition.

Abstract: Zero-power-consumption communication methods and a device for cellular communication and sidelink communication are provided in the application. The zero-power-consumption communication method for cellular communication at least includes: a zero-power-consumption device. A zero-power-consumption communication method based on cellular communication by the zero-power consumption device includes receiving a power supply signer, wherein the power supply signal is used for supplying power to the zero-power-consumption device; receiving a trigger signal sent from a network device; and the zero-power-consumption device sending a signal through a back scattering way according to the trigger signal and the power supply signal.

Abstract: A method for preparing 3,3?,4,4?-dicyclohexyltetracarboxylic acid and a method for treating an acidic wastewater are provided. In the preparation method according to the present disclosure, a ruthenium-rhodium mixed catalyst is used to catalyze the hydrogenation reduction reaction, which improves the selectivity of the reaction and reduces the generation of isomers, thereby reducing the generation of by-products and increasing the purity of 3,3?,4,4?-dicyclohexyltetracarboxylic acid. The results of the examples show that the purity of 3,3?,4,4?-dicyclohexyltetracarboxylic acid prepared by the method according to the present disclosure is not less than 99.62%.

Abstract: A lawnmower comprising: a body; a cutting element coupled with the body; a motor configured to drive the cutting element; a sensor comprising an accelerometer configured to detect an angular displacement of the lawnmower with respect to a vertical axis and a wobble of the cutting element with respect to a horizontal plane; and a processor configured to: compare the detected angular displacement against a tilt threshold value; compare the detected wobble against a wobble threshold value; and control an operational speed of the cutting element when the angular displacement exceeds the tilt threshold value or when the wobble exceeds the wobble threshold value.

Abstract: According to one embodiment, a hybrid cooling system includes a cold plate that is arranged to mount on an IT component that is mounted on a piece of IT equipment, the cold plate is arranged to receive coolant via a supply line and to return warmed coolant via a return line, the warmed coolant is produced by the cold plate when the cold plate is in contact with the IT component and heat generated by the IT component is transferred into the coolant by the cold plate; a TEC element that is arranged to couple to the IT component; and a heat sink that includes a base that is arranged to couple to the TEC element and one or more fins, the TEC element is configured to transfer at least a portion of the heat generated by the IT component into the one or more fins of the heat sink.

Abstract: Provided herein is an electric powered digging apparatus comprising: a powerhead, the power head comprises a motor and a gearbox; a handle frame, the powerhead is mounted onto the handle frame; and a drill bit, the drill bit is driven by the motor to rotate around a longitudinal axis, the electric power digging apparatus further comprises: a first safety mechanism, wherein the first safety mechanism reduces torque output to the drill bit when the powerhead spins around the longitudinal axis for an angle larger than a first threshold, and a second safety mechanism, wherein the second safety mechanism reduces torque output to the drill bit when the powerhead spins around the longitudinal drive axis at an angular speed larger than a second threshold FIG.

Abstract: In one embodiment, an autonomous driving system to autonomously drive an autonomous driving vehicle (ADV) includes one or more processors, a perception module executed by the processors to perceive a driving environment surrounding the ADV, and a planning module executed by the processors to plan a path based on perception data of the driving environment to navigate through the driving environment. The processors are mounted on one or more cold plates coupled to a vehicle cooling system of the ADV, the vehicle cooling system having a first radiator and a first coolant distribution loop coupled to a vehicle engine of the ADV to provide liquid cooling to the vehicle engine. The cold plates are coupled to the first radiator via a second coolant distribution loop to receive a portion of the coolant from the first radiator to extract heat from the cold plates.

Abstract: A lawnmower comprising: a body; a cutting element coupled with the body; a motor configured to drive the cutting element; a sensor comprising an accelerometer configured to detect an angular displacement of the lawnmower with respect to a vertical axis and a wobble of the cutting element with respect to a horizontal plane; and a processor configured to: compare the detected angular displacement against a tilt threshold value; compare the detected wobble against a wobble threshold value; and control an operational speed of the cutting element when the angular displacement exceeds the tilt threshold value or when the wobble exceeds the wobble threshold value.

Abstract: Power tools, snow throwers, and heated grips for snow throwers are provided. An exemplary heated grip for a power tool having a handle configured to be engaged by an operator includes a first heating element configured to be disposed at least partially on a first side of the handle; and a second heating element configured to be disposed at least partially on a second side of the handle, wherein the first heating element is moveable relative to the second heating element.

Abstract: A program function triggering method and apparatus, a device, a system, a medium, and a program product are provided, which relate to the field of computer communication. The method includes displaying triggering prompt information after a near field message transmitted by a function device is received, a distance between the terminal and the function device being within a near field communication (NFC) range, and the terminal carrying a target application program; receiving a trigger operation on the triggering prompt information, the triggering prompt information triggering a program function that is in the target application program and that is related to the function device; and displaying a function interface of the target application program based on the trigger operation, the function interface displaying content of the program function.

Abstract: A method of controlling a fan speed for a battery unit includes determining power discharge and a current temperature of a battery unit and obtaining a relationship between fan speed for the battery unit and temperature of the battery unit based on the power discharge and the current temperature of the battery unit. The method further includes identifying a minimum fan speed based on the relationship between fan speed and temperature and a maximum operating temperature of the battery unit and controlling the fan by setting the speed of the fan to the minimum fan speed.

Abstract: A cooling and heating system for an electronic component comprises a thermoelectric element disposed near the electronic component and an electrical circuit for a bidirectional current, where the thermoelectric element is connected to the electrical circuit for the bidirectional current. The cooling and heating system further comprises a controller configured to control a current flow direction of the bidirectional current in the thermoelectric element to cool or heat the electronic component, where whether the electronic component is to be cooled or heated is based on the current flow direction of the bidirectional current in the thermoelectric element.

Abstract: An electronic rack includes an array of server blades arranged in a stack. Each server blade contains one or more servers and each server includes one or more processors to provide data processing services. The electronic rack includes a coolant distribution unit (CDU) and a rack management unit (RMU). The CDU supplies cooling liquid to the processors and receives the cooling liquid carrying heat from the processors. The CDU includes a liquid pump to pump the cooling liquid. The RMU is configured to manage the operations of the components within the electronic rack such as CDU, etc. The RMU includes control logic to determine an optimal pump speed to minimize the total power consumption of the pump, acceleration servers and the host servers, based on the one or more parameters and the association between temperature and power consumption of the acceleration servers and the host servers. The RMU then controls the liquid pump based on the optimal pump speed.

Abstract: Provided are a method and device for positioning, and a non-transitory computer-readable storage medium. The method includes: receiving a positioning indication, herein the positioning indication indicates positioning of a first item, and the first item has a first electronic tag; obtaining RSSIs of a plurality of second electronic tags, herein the plurality of second electronic tags include the first electronic tag; determining, based on the RSSIs of the plurality of second electronic tags, at least one third electronic tag; and positioning, through the at least one third electronic tag, the first item.

Abstract: A cooling system comprises a board management controller (BMC), a thermoelectric cooling (TEC) controller, and a cooling distribution unit (CDU) controller. The BMC monitors a cooling system to obtain a first power value representing a power consumed by an electronic device, performs a lookup operation in a control lookup table based on the first power value, and determines a first thermoelectric cooling (TEC) current and a first pump speed based on the lookup operation. The TEC controller is to control a TEC device attached to the electronic device to cause the first TEC current to flow within the TEC device. The CDU controller is to configure a pump speed of a fluid pump of the CDU according to the first pump speed.

Abstract: A bridge circuit with series-connected switches and associated control method. The bridge circuit has a first bridge arm and a second bridge arm coupled to a common node, the first bridge arm has a plurality of series-connected first main switches, each first main switch is coupled in parallel with an auxiliary module, each first auxiliary module has a clamping capacitor and an auxiliary switch, the first bridge arm receives a first main switch signal to control the plurality of series-connected first main switches, the second bridge arm receives a second main switch signal, the control method is sensing voltages of the clamping capacitors in the first bridge arm, correspondingly generating voltage sensing signals, and turning on at least one auxiliary switch for a predetermined time during a dead time according to a sorting result of the voltage sensing signals.

Abstract: Provided are a communication method and device, and a storage medium. Provided are a communication method and device, and a storage medium. The method comprises: a control device determining a first resource and a second resource, there being no resource overlap between the first resource and the second resource; and the control device communicating with a first device by means of the first resource and communicating with a second device by means of the second resource, the second device comprising an energy collection module and/or a backscatter module.

Abstract: Disclosed in the present application are a backscatter transmitter and a signal transmission method, relating to the field of mobile communication. The backscatter transmitter comprises a processor, a receiving antenna, a transmitting antenna, and a keying switch; the processor is used for controlling the connection path between the receiving antenna and the transmitting antenna by means of controlling the keying switch; the receiving antenna is used for receiving a first radio frequency signal; the connection path is used for modulating the phase of the first radio frequency signal to obtain a modulated second radio frequency signal; and the transmitting antenna is used for transmitting the second radio frequency signal.