99results about How to "Avoid endless loop" patented technology

The invention relates to a database updating synchronization method and system and a database cluster. The method comprises the steps of receiving an updating command for a first database, and identifying whether the updating command is a copied updating command or not according to a preset database session attribute; if not, converting the updating command into a new updating command containing same data operation information; judging whether a second database linked with the first database meets a preset real-time updating condition or not; if the preset real-time updating condition is met, sending the new updating command to the second database for execution; and if the preset real-time updating condition is not met, storing the new updating command for the second database, and performing synchronous updating delay on the second database according to the stored updating command. According to the method, the system and the database cluster, the endless loop during updating synchronization of the databases in the cluster can be avoided and the overall data updating synchronization speed of the cluster is increased.

The invention discloses a data packet transmission method. The method comprises the steps that: an agent program receives request data packets through a monitoring port, sets labels for the request data packets, and then, sends the request data packets with the labels; a local system receives the request data packets sent by the agent program and an application program, matches the labels in the request data packets, directly forwards the request data packets if the labels are successfully matched, and redirects the request data packets to the monitoring port of the agent program if the labels are failed to match; label setting of the data packets sent by the agent program is carried out; therefore, the local system can distinguish the request data packets from the application and the agent according to the labels; furthermore, corresponding operation is carried out; and thus, endless loop of the data packets in local can be avoided. The invention further discloses a data packet transmission system.

The invention discloses a user behavior analysis method under a LINUX system. The user behavior analysis method comprises the steps of (01) automatically triggering a LINUX scheduled task in a timed mode, forming new data in a previous preset time period, and storing the new data into a database; (02) judging whether user behaviors in the current time period are processed or not, if the user behaviors are processed, directly exiting the user behavior analysis, and if the user behaviors are not processed, reading user behavior logs in the previous preset time period; (03) filing and combining the behavior logs obtained in the step (02) to form new data, and executing the operation of updating the data; (04) judging whether the execution of the operation of updating the data succeeds or not, and if the execution of the operation of updating the data succeeds, ending the user behavior analysis; if the execution of the operation of updating the data does not succeed, recording the cause of the failure, and judging whether the user behavior analysis can be carried out again or not. Compared with the prior art, the multi-thread synchronization processing is achieved, the response speed is high, and reliability is high.

The invention discloses a sheet metal paint spray booth of automobile spare parts. The sheet metal paint spray booth of the automobile spare parts comprises a paint spray booth body, wherein a filtering cotton bearing bracket is connected to the upper end of the left side of the paint spray booth body; an air inlet chamber is arranged at the upper end of a wallboard; axial flow fans are arranged at two sides of the lower end of the air inlet chamber; a filtering frame is connected to the middle part of the paint spray booth body; mid-effect filtering cotton is connected to the filtering frame; lamps are connected to two sides of the lower end of the filtering frame; a water tank of which the lower end is connected with a water curtain is arranged at the lower end of the right side of the paint spray booth body; a foundation is connected to the bottom end of the paint spray booth body; settling treating water is at the upper end of the foundation, and a paint molecule filtering net is connected to the upper end of the settling treating water; an air exhaust pipeline is connected to the right end of the paint spray booth body; an air outlet which is connected with an exhaust gas purifying device is connected to the right end of the air exhaust pipeline. The sheet metal paint spray booth of the automobile spare parts meets the paint spraying requirement of large spare parts; the settling treating water is at the lower end of the foundation, so that water mist can be prevented from being directly sprayed to various machines in the paint spray booth, and meanwhile, the requirement of paint mist treatment can be met.

The invention provides a movable lateral sliding type uncovering garbage can based on microwave induction technology. The movable lateral sliding type uncovering garbage can comprises a sliding cover, a can body and a base plate with four wheels. The can body is installed on the base plate with the four wheels. The sliding cover is installed on the can body. The sliding cover comprises two layers of fixed supports and a slidable cover face. The slidable cover face is clamped between the two layers of fixed supports. A microwave positioning device and an electromagnetic mechanical control device are installed on the sliding cover. A microprocessor, a power device and a movable device are installed inside the base plate with the four wheels. A radio frequency identification device, a Bluetooth device and an intelligent reminding device are installed inside the can body. The microwave positioning device, the electromagnetic mechanical control device, the power device, the movable device, the radio frequency identification device, the Bluetooth device and the intelligent reminding device are connected with the microprocessor. According to the garbage can, no manual uncovering is needed, so that the garbage can is sanitary and clean; a user does not need to be reminded to open the cover, so that the intelligent degree is high, the large-range deviation can be automatically adjusted, and use is more free.

The invention provides a multi-computer communication method based on single-chip microcomputers, which is used to realize master-slave type communication of a plurality of single-chip microcomputersand RS422 bus connection among the various single-chip microcomputers. A master computer is used to calculate priorities of various slave computers by using data lengths, scanning times, slave computer addresses, and then is used to allocate data transmission orders, until transmission of all data is completed, and at last, by adopting a communication efficiency quantization method, communicationefficiency is evaluated, and is used as a basis of priority parameter optimization. The priorities are adjusted dynamically, the communication efficiency optimization parameters are quantized, andtherefore the priorities are guaranteed, and line communication resources are fully used. According to the invention, realization is simple, and requirements on actual application are satisfied.

The invention discloses an integrated type vertical air conditioning unit. The integrated type vertical air conditioning unit comprises a first cabin body and a second cabin body, wherein the first cabin body is positioned above the second cabin body; an evaporating air-feeding device is arranged in the first cabin body; a U-shaped condenser is arranged on the inner part of the second cabin body;one side, opposite to the bottom surface of the U-shaped condenser, of the second cabin body is equipped with an access door; and a condensing fan is mounted on the access door in a fastening mode. The air conditioning unit adopts an integrated type vertical side heat dissipation structure, saves space, and can be convenient for maintaining equipment inside the air conditioning unit.

The invention discloses an updating method of clock skew as well as an announcing method and device of clock skew information, belonging to the technical field of communications. The updating method comprises the steps: receiving information from a communication opposite terminal; obtaining the types of the information according to the information type fields of the information; and updating the local clock skew according to the types of the information and the information. The device comprises a receiving module, an obtaining module and an updating module. When the information from the communication opposite terminal is received, the information types are obtained according to the information type fields of the information, and the local clock skew is correspondingly processed according to the information types, so that when 0-length application data are received, the information types can be exactly distinguished, the dead circulation of the information can be avoided, and the communication error rate can be reduced.

The invention discloses a solar air-conditioning system having charging, control and lightning protection functions. The system comprises a solar cell, a solar controller, a storage battery and a variable frequency air conditioner. The solar controller comprises a charging circuit, a control circuit, a lightning protection circuit and a discharge circuit. The variable frequency air conditioner comprises an inverter circuit. The lightning protection circuit comprises a sixty-first fuse, a sixty-first resistor, a sixty-second resistor, a first piezoresistor, a second piezoresistor, a sixty-first diode, a sixty-second light-emitting diode and a discharge tube. The system can protect lighting effectively, improves system safety performance, can protect activity of the storage battery when charging the storage battery, can prolong the service life of the storage battery, can improve charge efficiency of the storage battery, prolongs power consumption time of the storage battery, has good self-startup capability, prevents an endless-loop state, is simple in circuit structure, is low in cost and can realize a good lightning protection effect.