2239results about How to "Reduce failure rate" patented technology

Disclosed are a dynamic spectrum allocation method, a center control unit, a BS (Base Station) and a spectrum allocation system. The dynamic spectrum allocation method comprises the steps of: receiving a bandwidth request message sent by the BS, wherein the bandwidth request message comprises a RF (Radio Frequency) ability of the BS, bandwidth requests on UFBs (Unlicensed Frequency Bands) of the BS, and a gather of LFBs (Licensed Frequency Bands) of the BS; determining a spectrum allocation plan according to the RF ability of the BS, the bandwidth requests on the UFBs of the BS, the gather ofthe LFBs of the BS and a obtained gather of the UFBs which are idle at present; and sending a bandwidth request response message which comprises the spectrum allocation plan, wherein the spectrum allocation plan is used for indicating UFB information allocated for the BS for use, and needs for gathering the bandwidth request of at least one LFB in the gather of the LFBs of the BS to the USF whichis allocated for the BS for use. Embodiments of the present invention also comprise the center control unit, the BS and the spectrum allocation system, thus failure probability of the spectrum allocation plan can be effectively reduced.

The present invention relates to a method of balancing a load and method of setting up a call using the load balancing method in a General Packet Radio Service (GPRS) network, which prevents a load from concentrating on a specific Gateway GPRS Supporting Node (GGSN) in the GPRS network, thus reducing a probability of failure in session establishment due to increased traffic. In the load balancing method, when a Service GPRS Supporting Node (SGSN) connected to a mobile node establishes a session, it selects a GGSN having a smallest number of established sessions among a plurality of GGSNs corresponding to an Access Point Name (APN) included in an Activate PDP Context Request message received from the mobile node and requests the selected GGSN to establish a session, thus solving a problem in which a load concentrates on a specific GGSN.

System and method for enabling the coexistence of multiple wireless communications on a single unit. A preferred embodiment comprises receiving a schedule of reserved message transfer times from a coexistence unit of a first wireless network in a mobile unit at a coexistence unit of a second wireless network in the mobile unit, selecting an operating mode for the coexistence unit based on the schedule, and transferring messages on the first wireless network and the second wireless network based on the schedule. The first wireless network is restricted to being able to transfer messages only during scheduled times. The sharing of the schedule of reserved message transfer times can enable the transfer of messages in the second wireless network to occur in between the reserved message transfer times, thereby reducing message collisions that can negatively impact data transfer performance of both wireless networks.

The invention relates to a photovoltaic array fault diagnosis and early warning method comprising the following steps: combining an Elman nerve network optimized by a non-linear least square method and a decision tree with experience knowledge so as to form a fault diagnosis model; collecting present photovoltaic array operation data and meteorology data, and computing errors when compared with historical normal state data; using the fault diagnosis model to obtain the corresponding fault type and credibility when the error is bigger than a threshold; finally integrally evaluating so as to obtain the final fault type credibility, and selectively carrying out fault early warning according to the credibility values; updating a fault knowledge base according to the field actual measurement conditions. The method combines the LM-Elman nerve network and the decision tree with experience knowledge so as to built the fault diagnosis model, thus improving the history data sensitivity, providing better prediction effect when compared with a BP network, and improving the network convergence speed and training precision; the experience knowledge is supplemented, thus providing stronger robustness; the method can timely detect and diagnose, thus reducing fault incidence rate, and ensuring the photovoltaic power station to stably work.

The invention discloses an electric pressure cooker based on an internet of things technology. The electric pressure cooker comprises an electric pressure cooker and strong algorithm software, wherein the electric pressure cooker serves as a thin client for running a weak algorithm, and controls strong algorithm of the electric pressure cooker to be arranged on the strong algorithm software; the strong algorithm software can be downloaded to a central control system of an intelligent housing system; the central control system and the electric pressure cooker perform communication based on Internet of things, and are connected with each other through a wireless communication mode or a wire communication mode. By the external strong algorithm, a user can look up data of all sensors in the electric pressure cooker on the central control system or a terminal device to change algorithm strategies according to the requirements, conveniently perform accurate control according to practical situations or use requirements, and relatively flexibly and individually use the electric pressure cooker.

Submount substrates are connected to both sides of a laser diode via hard solders. The lower submount substrate and a heat sink are connected together by a soft solder. The heat sink and a presser electrode are fixed with a predetermined gap therebetween via an insulating spacer. A coil electrode is fitted in a V-shaped groove of the presser electrode. As the coil electrode is deformed slightly elastically, the coil electrode is pressed against the upper submount substrate.

A wind power installation having external and/or internal redundancy derived by multiple, independent power generating systems arranged in parallel, but switchably interconnected to allow substantial continued operation in the event of a critical component failure.

The invention discloses a cross-layer route optimization method and a cross-layer route optimization device for a wireless Mesh network. The method comprises the following steps of: estimating the channel state of a current network according to the transmission efficiency parameter of a wireless link, judging the major cause of current packet loss according to a packet success ratio and a residual load rate when the channel state is poor, and adjusting the maximum retransmission time according to the packet loss cause; and acquiring the transmission efficiency PTEP of an entire route according to the transmission efficiency parameter of the wireless link, acquiring the residual load rate L-P of the route from which a source node and a target node are removed, computing the effective bandwidth etaB(c) of the route, constructing a route decision function according to the transmission efficiency PTEP of the route, the residual load rate L-P of the route and the effective bandwidth etaB(c) of the route, performing route discovery and route maintenance operation by using the route decision function, and selecting an optical packet transmission route between the source node and the target node. According to the invention, the route quality of an MAC (Media Access Control) layer can be sensed more accurately, and the error judgment times of the route are reduced.

The embodiment of the invention discloses an insulated gate bipolar transistor-driven protective circuit which comprises a signal transmission circuit, a gate pole driving circuit, a voltage detecting circuit and a blocking time setting circuit, wherein the signal transmission circuit is used for transmitting a driving signal to the gate pole driving circuit; the gate pole driving circuit is used for amplifying the driving signal from the signal transmission circuit, and then driving an insulated gate bipolar transistor to act through the amplified driving signal; the voltage detecting circuit is used for transmitting a fault indicator signal to the blocking time setting circuit once the voltage between a collecting electrode and an emitting electrode of the insulated gate bipolar transistor is detected over a set voltage threshold, wherein the voltage threshold is more than the driving voltage of the insulated gate bipolar transistor; the blocking time setting circuit is used for transmitting a locking signal to the signal transmission circuit after receiving the fault indicator signal from the voltage detecting circuit; and the signal transmission circuit also can be used for blocking and outputting the driving signal to the gate pole driving circuit after receiving the locking signal from the blocking time setting circuit. With adoption of the insulated gate bipolar transistor-driven protective circuit, misinformation of a short circuit fault can be avoided.

The invention discloses data redundancy and file operation methods based on a Hadoop distributed file system (HDFS). The file operation method comprises the processes of file writing, file reading, file adding and file deletion. The file writing process comprises the following steps of: giving a file writing request by a client; allocating main nodes; segmenting a file; generating and storing basic blocks; generating and storing coding blocks; and reporting the main nodes. The file reading process comprises the following steps of: giving a file reading request by the client; selecting the main nodes; sending information data; according to the information data, restoring an original file; and reporting the main nodes. The file adding process comprises the following steps of: giving a file adding request by the client; querying file information; allocating the main nodes; segmenting an added file; generating and storing the basic blocks; generating and storing the coding blocks; and reporting the added file. The file deletion process comprises the following steps of: giving a file deletion request by the client; processing the file name of the file to be deleted; deleting a hidden file; deleting isolated block metadata; and deleting any block. The invention has the advantages of high read-write performance and efficiency and reliability in storage, and can be applied to storage and management of the HDFS under the access of a great number of clients; and storage resources are saved.

A wind power installation having external and/or internal redundancy derived by multiple, independent power generating systems arranged in parallel, but switchably interconnected to allow substantial continued operation in the event of a critical component failure.

The invention discloses a face alignment method based on cascade position regression of random forests. The face alignment method is characterized in that 1, a normalized face image is acquired; 2, the average shape of the faces can be calculated; 3, a candidate feature point of a face alignment frame is generated; 4, a face shape index grey level is generated; 5, a face shape index feature X is generated; 6, a face alignment frame is built; 7, the face shape is initialized, and after the continuous iteration, the final estimated face shape can be output. The good robustness can be kept under the conditions of the changing illumination, the changing expressions, and the shielding, and the precision can be improved, and the failure rate can be reduced.

The invention relates to a service function chain reliable deployment method based on deep reinforcement learning, and belongs to the technical field of communication. The method comprises the following steps: S1, obtaining a reliability value based on the reliability measurement mode of the equipment use degree and the peripheral safety coefficient; S2, preliminarily determining a reliability demand of each virtual network function through the functional characteristics and the topological characteristics; S3, obtaining the deployable length of the link reliability requirement meeting the virtual link reliability requirement; S4, searching an optimal mapping scheme suitable for the virtual network environment and the base environment by using deep reinforcement learning based on each reliability demand; and S5, if the VNF reliability cannot be satisfied in the mapping process, using an importance-based node backup method, and if the link deployment result does not satisfy the link reliability, using a link backup importance-based link backup method. The method can effectively deal with basic faults on the basis of ensuring reliability requirements, reduces the number of failure SFC, and ensures load balance to make the whole virtual network more stable and reliable.

The invention discloses a running state monitoring and failure diagnosis method for a tobacco logistics system. The method comprises the following steps: (1) acquiring the whole running state information of the logistics system in real time on line through a data acquisition system; (2) remotely monitoring the state of common logistics system equipment in real time, and performing failure diagnosis; (3) firstly, determining various combination modes of the failure reasons of each key logistics equipment, and secondly, inputting a diagnosis rule into an SQL (Structured Query Language) database of a failure diagnosis server, wherein the diagnosis rule serves as the source of a failure experience knowledge base; (4) storing failure result information which is obtained by automatic diagnosis through the failure diagnosis server and serves as alarm information into a failure alarm record base, triggering a wireless alarm module, and informing an on-duty equipment maintainer of failure information immediately in a short message mode. According to the method, the failure burst rate of the tobacco logistics system is effectively reduced, the failure maintenance efficiency is improved, and the equipment maintenance cost is reduced.

The invention relates to a method for carrying out online monitoring on an operating state of a transformer OLTC (on-load tap-changer) and belongs to the field of signal monitoring. The method comprises the following steps of: acquiring a mechanical vibrating signal of a box wall of a transformer in real time; carrying out phase space reconstruction on the vibrating signal x(t) by using a delay coordinate method; determining a designated area V of a reconstructed phase space; calculating density distribution of space phase points; calculating a correlation coefficient rho of a space density curve before and after the OLTC actuates; if the correlation coefficient rho is more than 0.8, judging that the operating state of the OLTC is normal; and if the correlation coefficient rho is less than 0.8, judging that the operating state of the OLTC is abnormal. By carrying out real-time monitoring on the vibrating signal in the actuating process of the OLTC, efficient and accurate judgment on the working state of the transformer OLTC can be implemented. The method can be widely used for the field of online monitoring and fault diagnosis of various transformer OLTCs.

The present invention belongs to the technical field of power electronics, in particular to an IGBT drive and protection circuit which can effectively realize power-down protection and can not be switched on by mistake. The IGBT drive and protection circuit comprises a common-emitter amplifying circuit, and a push-pull drive circuit and IGBT, wherein the common-emitter amplifying circuit is provided with a PWM signal input terminal for amplifying PWM signals, and the push-pull drive circuit is provided with a VDD power supply input terminal for receiving power from a VDD power supply. An NPN triode is connected between the common-emitter amplifying circuit and the PWM signal input terminal. The PWM signal input terminal is led out from the emitter; a base electrode of the terminal is provided with a VCC power supply input terminal through a resistor for receiving power from a VCC power supply; and a collecting electrode of the terminal is connected with the VDD power supply input terminal through a resistor. The IGBT drive and protection circuit has functions of power-down protection, gate protection and overvoltage protection for collecting electrodes, and is stable and reliable.

The invention provides a method, device and system for processing a fiber channel identity, and network equipment. The method comprises the following steps of: receiving a first fabric login (FLOGI) or a first fabric discovery (FDISC) sent by host equipment, wherein the first FLOGI or the first FDISC comprises an equipment identifier of an N port of the host equipment; selecting a FC ID (Fiber Channel Identity) from pre-applied non-distributed FC IDs according to the first FLOGI or the first FDISC; and encapsulating the selected FC ID into a first LS_ACC (Link Service Accept) and sending the first LS_ACC to the host equipment. In the technical scheme disclosed by the invention, by pre-applying the FC ID, when the host equipment applies for the FC ID, the FC ID can be directly distributed to the host equipment from the pre-applied FC IDs; therefore, an interaction link is omitted when the host equipment applies for the FC ID; and the problem of FLOGI or FDISC failure of the host equipment caused by delayed FC ID distribution is solved.

The embodiment of the invention discloses a method and a device for compiling a control program. The method comprises the steps of: compiling and linking a source program to generate an intermediate language program with limited variable features; mapping the intermediate language program with the limited variable features into a target command based on a mapping relationship between the intermediate language program with the limited variable features and the target command which can be directly carried out by a target processor. Through the embodiment of the invention, demands of the system on reliability and safety can be satisfied.