Abstract: A method for determining a source of pollutant emissions for a selected area includes: mapping a grid onto a representation of the selected area; collecting monitoring data for the selected data; from the monitoring data, assigning air pollution values and weather values to each cell in the grid using an interpolation method to estimate values for gap cells; re-sizing the grid to mitigate the influence of atmospheric turbulence on the air pollution values; and using weather factor separation to minimize the influence of weather from the air pollution values, resulting in air pollution values that reflect the net pollutant emissions for the selected area.

Abstract: Technical solutions are described for optimizing operation of a server cluster. An example method includes receiving a job request that executes using a set of data blocks, the job request being associated with an expected completion time. The cluster server is used to identify a set of replica servers, wherein each server from the set of replica servers contains the set of data blocks. In response to each server from the set of replica servers estimating a completion time for the job request that is more than the expected completion time, a new server is initiated, the set of data blocks is relocated from a first server from the set of replica servers to the new server, and the job request is allocated to the new server.

Abstract: An event analyzing device includes an event data collector configured to collect event data which represents an event including an alarm which has occurred in a plurality of devices in a plant and an operation performed to the devices, a process data collector configured to collect process data of the devices in the plant, a trend change detector configured to detect a trend change of the process data collected by the process data collector, an event data converter configured to convert the trend change detected by the trend change detector into a process change event represented in the same format as the event, and a cause-effect relationship analyzer configured to integrate the event data collected by the event data collector and process change event data which represents the trend change in the process change event converted by the event data converter to analyze a cause-effect relationship between the event and the process change event.

Abstract: An event analyzing device includes an event collector configured to collect log data of a manual operation event performed by an operator of a plant, an event analyzer configured to analyze a manual operation method or a manual operation intention of the manual operation event based on the log data, a manual operation sequence extractor configured to extract the manual operation method or the manual operation intention for each predetermined period as manual operation sequences in order of time, a manual operation sequence classifier configured to classify the manual operation sequences in which manual operations are in a similar order from among the manual operation sequences, a manual operation procedure constructor configured to construct a manual operation procedure of the operator based on the manual operation sequences, a process data collector configured to collect process data of the plant, and a manual operation condition estimator configured to estimate an execution condition under which manual oper

Abstract: The present invention discloses a voltage reference reconfiguration fault-tolerant control method for a cascaded multi-level inverter. The fault-tolerant method for the inverter automatically reconfigures the three-phase voltage amplitudes and phases of the three-phase total voltage in accordance with the fault diagnosis, thus realizing three-phase voltage balance. On the basis of the reconfiguration of the total voltage signal, re-reconfiguration of reference voltage inputted into the various H-bridges is conducted in accordance with the fault signal vectors, thereby realizing removal of the fault bridges and fault-tolerance of the normal bridges, while guaranteeing the integral sinusoidal characteristics of the actual reference voltage. The inverter realized maximum three-phase balanced line voltage in a fault occurrence, has the advantages of requiring no redundant modules and algorithms and the advantages of ease of removing fault bridges, and is applicable for reduced load operable electrical equipment.

Abstract: a method and system for managing a modulation and coding scheme (MCS). The method includes: a base station obtaining a downlink channel quality indicator (CQI) when a block error ratio of a trunking terminal reaches a pre-stored block error ratio threshold; the base station comparing a current CQI of a group with a CQI locally stored and reported by the group, wherein the CQI reported by the group is the minimum value in received CQIs reported by trunking terminals in the group respectively; and if a comparison result is that the CQI reported by the group is smaller than the current CQI of the group, the base station initiating an operation of updating an MCS value.

Abstract: A pick arm for a pick and place apparatus for semiconductor devices, the pick arm comprising first and second ends along a longitudinal axis of the pick arm, and a pick tool located at the first end of the pick arm for picking up semiconductor devices. The pick arm further comprises a winged part extending in a direction transverse to the longitudinal axis between the first and second ends of the pick arm, wherein the winged part comprising a sloping surface. The sloping surface is inclined between a top portion and a bottom portion of the winged part such that the sloping surface is nearer to the longitudinal axis at the top portion than at the bottom portion of the winged part.

Abstract: An event analysis device having an event collector for collecting event log data representing an operation history by a DCS operator; an event analyzer for analyzing the event log data, and extracting basic unit operations or unit operations representing an operation method based on operations of the DCS operator or an operation intention based on operations of the DCS operator; an operation sequence extractor for extracting operation sequences which the basic unit operations or the unit operations are aligned in accordance with time order in every service time period; an operation clusterer for clustering the operation sequences based on similarity among the operation sequences extracted in every service time period; and an operation procedure generator for analyzing the operation sequences clustered in same type, and estimating a structure of the operation procedure based on the operation of the DCS operator.

Abstract: An event analysis device includes an event collector configured to collect event log data which represents operation history of a DCS operator; an event analyzer configured to analyze event log data collected by the event collector to extract analysis result data representing operation method based on the operation of the DCS operator or analysis result data representing operation intention based on the operation of the DCS operator; an operation sequence extractor configured to extract analysis result data respectively in every period in specified multiple periods and extract operation sequence sorting analysis result data based on operation time; and an operation sequence clusterer configured to cluster the operation sequence based on the degree of the similarity between the operation sequences which are different from each other.

Abstract: An event analyzer includes: an event collector configured to collect event log data representing operation history which an DCS operator performed; a basic unit operation analyzer configured to analyze event log data, and extract basic unit operation data representing operation method based on the operation by the DCS operator; and an unit operation analyzer configured to analyze basic unit operation data, and extract unit operation data representing intention of the operation by the DCS operator.

Abstract: An event analyzer includes an event log collection module configured to collect an event log, an event log storage module configured to convert the event log into an event matrix and to store the event matrix, an event occurrence-order determination module configured to determine occurrence-order of device events based on the event matrix, a Bayesian network generation module configured to specify device events serving as parent node candidates, to calculate evaluation values corresponding to each specified parent node candidate at a virtual device event obtained by shifting the device event serving as a processing object each unit time, and to select an device event serving as a parent node together with a shift amount, and an analysis module configured to output an device event estimated as a cause of an device event to be analyzed, or an device event estimated to occur later based on the shift amount.

Abstract: The present invention provides a stratigraphic correlation method and apparatus based on uncertainty. The stratigraphic correlation method comprises: determining a plurality of possible correlation positions in a well with uncertain layered position in a profile, in a stratigraphic correlation process; assigning a qualitative or quantitative certainty value to the plurality of correlation positions; and storing and displaying the plurality of correlation positions and certainty values thereof as different layered solutions on the profile, respectively. By setting a plurality of position solutions for a layer in the present invention, all possibilities of the layered position judged by the geological personnel can be recorded as references for the subsequent correlation of other profiles, the closing of the whole layered solution, and the quality control.

Abstract: The field of advanced wastewater treatment, and more specifically, to a natural pyrrhotite biofilter and a method for utilizing same to synchronously remove nitrate-nitrogen and phosphorus from water is provided. The method includes the following steps: (1) preparation of the packing material and construction of the biofilter; (2) start-up of the biofilter; (3) operation of the biofilter. The method disclosed in the present invention on the one hand takes pyrrhotite as the electron donor to help sulfur-based autotrophic denitrifying bacteria reduce nitrates into nitrogen gas, and on the other hand utilizes pyrrhotite and its oxidates to eliminate phosphorus through adsorption and chemical precipitation. Therefore, this method realizes synchronous removal of nitrate-nitrogen and phosphorus in water.

Abstract: a method and system for managing a modulation and coding scheme (MCS). The method includes: a base station obtaining a downlink channel quality indicator (CQI) when a block error ratio of a trunking terminal reaches a pre-stored block error ratio threshold; the base station comparing a current CQI of a group with a CQI locally stored and reported by the group, wherein the CQI reported by the group is the minimum value in received CQIs reported by trunking terminals in the group respectively; and if a comparison result is that the CQI reported by the group is smaller than the current CQI of the group, the base station initiating an operation of updating an MCS value.

Abstract: A method for sending a cluster message comprises: configuring a preamble range for random access of a cluster terminal under a current cell, and a base station notifying each terminal of the configured preamble range for random access of the cluster terminal through a broadcast message; the base station receiving a random access request initiated by the terminal, and if it is determined that the terminal transmits a cluster message through a random access process by a preamble in the random access request, then performing Msg3 authorization on the terminal according to a type of the cluster random access, and notifying the terminal of an authorization result through an Msg2; the terminal receiving the Msg2, forming an Msg3 according to the authorization result in the Msg2 and uplink information to be sent, and sending the Msg3 to a network side.

Abstract: A data acquired system is provided. The data acquired system includes a main structure with a cavity formed therein, the cavity having a bottom for mounting a circuit board with electrical components thereto, a fan assembly disposed on the main structure, and an airflow guide disposed within the cavity and configured to guide airflow from the fan assembly for heat dissipation of the electrical components, the airflow guide positioned at a distance above the electrical components to form a gap between the airflow guide and the electrical components, wherein a sidewall of the cavity is provided with an air vent corresponding to the gap such that the airflow passes through the gap and is discharged from the air vent.

Abstract: An event analyzer includes an event log collection module configured to collect an event log, an event log storage module configured to convert the event log into an event matrix and to store the event matrix, an event occurrence-order determination module configured to determine occurrence-order of device events based on the event matrix, a Bayesian network generation module configured to specify device events serving as parent node candidates, to calculate evaluation values corresponding to each specified parent node candidate at a virtual device event obtained by shifting the device event serving as a processing object each unit time, and to select an device event serving as a parent node together with a shift amount, and an analysis module configured to output an device event estimated as a cause of an device event to be analyzed, or an device event estimated to occur later based on the shift amount.

Abstract: A self adjusting bearing for use on a CT gantry is provided. The self adjusting bearing is configured to be mounted on a main frame of the CT gantry and is configured to support a rotating base of the CT gantry wherein the self adjusting bearing includes a roller, a first component, and a second component, the roller is configured to support the rotating base and is rotatably mounted on the first component, the second component is configured to be mounted on the main frame, and the first component and the second component are configured to rotatably engage each other such that they can rotate relative to each other during the mounting of the self adjusting bearing.

Abstract: A data acquired system is provided. The data acquired system includes a main structure with a cavity formed therein, the cavity having a bottom for mounting a circuit board with electrical components thereto, a fan assembly disposed on the main structure, and an airflow guide disposed within the cavity and configured to guide airflow from the fan assembly for heat dissipation of the electrical components, the airflow guide positioned at a distance above the electrical components to form a gap between the airflow guide and the electrical components, wherein a sidewall of the cavity is provided with an air vent corresponding to the gap such that the airflow passes through the gap and is discharged from the air vent.

Abstract: A self adjusting bearing for use on a CT gantry is provided. The self adjusting bearing is configured to be mounted on a main frame of the CT gantry and is configured to support a rotating base of the CT gantry wherein the self adjusting bearing includes a roller, a first component, and a second component, the roller is configured to support the rotating base and is rotatably mounted on the first component, the second component is configured to be mounted on the main frame, and the first component and the second component are configured to rotatably engage each other such that they can rotate relative to each other during the mounting of the self adjusting bearing.