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Train air conditioning load control method based on passenger weighing system and train air conditioning load confirming method

The invention discloses a train air conditioning load control method based on a passenger weighing system and a train air conditioning load confirming method. The train air conditioning load control method based on the passenger weighing system comprises the following steps of S1, obtaining passenger weight data of each train compartment and exerting an air conditioning load module of a train air conditioning control system to calculate a load value of each train compartment needed by air conditioner simulation; S2, obtaining supply path refrigerant temperature data, return path refrigerant temperature data and refrigerant flow data of an air conditioner of each train compartment, and exerting the air conditioning load module of the train air conditioning control system to calculate the load value of each train compartment, actually needed by the air conditioner; and S3, comparing the needed load value of each train compartment by calculation simulation and the actually needed load value of each train compartment, and adjusting refrigerating capacity of the train air conditioning control system through comparing the load states in real time so that passengers feel comfortable and the method is also energy-saving and consumption-reducing. Compared with the traditional method for controlling the load of the air conditioning system through monitoring the temperature in the compartment, the train air conditioning load control method disclosed by the invention is advantaged in that the feedback of the load of the air conditioning system is rapid and accurate.
Owner:CRRC CONSTR ENG CO LTD

Bidirectional stress state stress-strain measurement device and method for thin-walled tube

The invention relates to a stress-strain information measurement device and method for a thin-walled tube, in particular to a bidirectional stress state stress-strain measurement device and method for a thin-walled tube. The device and method are used for solving the problems that according to an existing device and method, accurate control over a stress path and accurate measurement of stress-strain information can not be achieved in a bidirectional stress state of the thin-walled tube, and the accurate stress-strain information can not be obtained when the thin-walled tube is in the bidirectional stress state. The device comprises a base, a strain gage, a movable beam, a pump station, an oil pressure booster, a force sensor, a pressure sensor, a control system, two upper chucks, two lower chucks, two lead screw pairs and two motors, wherein the two motors are installed on the base in parallel, and one lead screw pair is fixedly installed at the output end of each motor. The measurement method includes the main steps that firstly, the thin-walled tube is selected; secondly, the two ends of the thin-walled tube are fixed and sealed; thirdly, a bidirectional stress-strain experiment is started; fourthly, the stress-strain information is detected; fifthly, the thin-walled tube is broken, and experimental data are saved.
Owner:HARBIN INST OF TECH

Method and system for uplink power control in time division duplex feedback enhanced system

The invention discloses a method and a system thereof for realizing uplink power control in a feedback enhancement system of time division duplex, which applies a bidirectional spectrum and comprises the following processes: a base station alternatively distributes uplink time slots in a wireless frame of the bidirectional spectrum to different terminals or different terminal groups; each terminal or each terminal group obtains the uplink time slots with the same interval; the base station chooses a unidirectional spectrum of a downlink to transfer a feedback signal of power control to the terminals; a wireless frame on the unidirectional spectrum and that on the bidirectional spectrum keep synchronous; the terminals transfer uplink signals within the distributed uplink time slots to the base station; the base station finishes parameter estimation within a specific delay and transfers a feedback signal of power control to the terminals by adopting the unidirectional spectrum; the terminals receive the feedback signal of power control on the unidirectional spectrum and regulate power control of terminals, thus preparing for transferring the uplink signals within downlink-uplink time slots distributed for the terminals within the same wireless frame. The invention realizes sending down the feedback signal of power control with high frequency of which the period is shorter than the length of the frame; besides, the feedback delay is small, and the system throughput is increased.
Owner:ZTE CORP

High-concurrency scene processing method and device based on Redis and Kafka online snap-up system

The invention provides a high-concurrency scene processing method and device based on a Redis and Kafka online snap-up system; the method comprises the following steps: generating a login token basedon a user login request, writing the login token into caches of front-end Cookie and rear-end Redis, checking whether the front-end login token is matched with the rear-end login token; if not, returning an operation failure result; if yes, judging whether the user login token is valid; if not, returning an operation failure result; if yes, judging whether a commodity lock of a corresponding commodity is obtained or not; if not, returning an operation failure result; if yes, pushing request data of snap-up success to a Kafka information queue. According to the method and the device in the invention, loading pressure of a server and a database is effectively reduced through current-limiting peak-clipping processing; a large number of concurrent requests can be borne in short time; the throughput capacity of the cluster is greatly increased; through front-rear end check on the number of user access times, a cheating user can be quickly found out, so that the event is guaranteed to be carried out stably and fairly.
Owner:成都博点科技有限公司

Refrigerating system cooling water energy-saving control method, system and device

The invention relates to the technical field of central air conditioner energy saving, in particular to a refrigerating system cooling water energy-saving control method. Under the conditions that the load of a refrigeration main machine is determined, and the cooling water inlet temperature of the refrigeration main machine is determined, the refrigerating system cooling water energy-saving control method comprises the steps that first, working condition parameter data, containing some parameter x, of an air conditioner system are obtained; second, the current system total power W[x] is obtained through calculation according to the working condition parameter data; third, the parameter x and the current system total power W[x] corresponding to the parameter x are stored in a database; fourth, system total power W[x<+>] and W[x<->] corresponding to two working condition parameters x<+> and x<-> respectively are obtained, the x<+> and the x<-> are adjacent to the numerical value of the parameter x, and the W[x<+>] and W[x<->] are compared with the W[x] to obtain an energy-saving working condition parameter; fifth, a corresponding device is adjusted to run according to the energy-saving working condition parameter. The invention further provides a refrigerating system cooling water energy-saving control system and device, and on the premise that it is ensured that the application performance requirement is met, an air conditioner refrigeration main machine and a cooling water pump run with the best overall efficiency, and the total system energy consumption is reduced.
Owner:厦门立思节能科技有限公司

Information investigating system and investigating method

The invention relates to an information investigation system and an investigation method. A system questionnaire investigation terminal (3) is communicated with a data acquisition server (2), the data acquisition server is communicated with a database sever (1), and a user inquiry terminal (4) is communicated with the database server and the data acquisition server respectively. The system questionnaire investigation terminal utilizes an embedded intelligent device. The system is in SOCKET communication with the questionnaire investigation terminal by utilizing the TCP / IP protocol as a bottom communication protocol and utilizes a LAN port as a physical communication interface. In case of questionnaires, a client only needs to respond a questionnaire sent from the data acquisition server on the questionnaire investigation terminal, then answer information can be immediately uploaded to the data acquisition server and the database server in the background for use of analysis, and the questionnaire investigation is automatically finished. The invention can update questions in the questionnaire in real time, the investigated target user is accurate, the investigation data is real and reliable, the investigation data can be fed back in real time, the invention can carry out continuous investigation of large sample quantity, and the investigation efficiency is high along with low cost.
Owner:SHANGHAI TUODI INFORMATION TECH
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