90results about How to "Prevent avalanche" patented technology

This invention was intended to develop an earth working equipment and system for digging holes in ground particularly in agricultural soils for needs including but not limited to transplanting of seedlings of flowers, vegetables, fruits, bushes, and shrubs; and for making holes for other purposes where hollow-cylindrical shapes are desired. One very important feature of the equipment is the provision of a removable or embeddable cylindrical retaining wall around the hole being dug thus preventing hole-deforming avalanches of soils, common in trowel assisted hole digging that results in V-shaped rather than cylindrical shaped holes. This provision and other features of the equipment ensure formation of consistent hollow-cylindrical holes effectively, efficiently and economically. The equipment consists of a tilling tool to loosen the soil, a screw conveyor to dig into and transport the soil away, and a cylindrical retaining wall to maintain cylindrical shape of the hole by preventing soil avalanches.

A power semiconductor device with improved avalanche capability structures is disclosed. By forming at least an avalanche capability enhancement doped regions with opposite conductivity type to epitaxial layer underneath an ohmic contact doped region which surrounds at least bottom of trenched contact filled with metal plug between two adjacent gate trenches, avalanche current is enhanced with the disclosed structures.

The invention discloses a data paging method. The method comprises: obtaining a page code X of a to-be-displayed webpage; calculating the total page number Y of resource data pages of the to-be-displayed webpage; determining a page code of a target data page corresponding to the page code X of the to-be-displayed webpage according to a preset corresponding relationship; and sending target data corresponding to the target data page to a client. Correspondingly, the invention further discloses a data paging apparatus. Compared with the prior art, the technical scheme provided by the invention can avoid the occurrence of an avalanche phenomenon of a cache, so that the cache hit ratio of data in each page can be increased, and the performance and data loading efficiency of the cache are improved.

The invention provides a coal mine underground reservoir and a multi-layer grouting anti-seepage reinforcement method for a reservoir dam and belongs to the field of coal mine underground construction. According to the multi-layer grouting anti-seepage reinforcement method, the area of the underground reservoir and the location of the coal pillar dam are determined and set through the volume; two side tunnels and withdrawal tunnels of the underground reservoir are drilled, concrete grout and silica sol are sequentially sprayed on the tunnel walls, and concrete and silica sol spray layers are formed; a plurality of shallow grouting holes are constructed in the sides, near the coal pillar dam, of the two side tunnels and the withdraw tunnels and the holes are sealed for grouting, and then a plurality of deep grouting holes are constructed and sealed for grouting; and finally, an artificial water retaining dam is constructed for sealing the tunnels, and accordingly the closed coal mine underground reservoir is formed. The multi-layer grouting anti-seepage reinforcement method has the double effects of reinforcement and sealing on the coal pillar of the coal mine underground reservoir; and nano-scale, inorganic, green and efficient materials are selected, the anti-seepage safety of the coal pillar dam can be ensured, and the coal mine underground reservoir is made durable and stable.

A power semiconductor device with improved avalanche capability is disclosed by forming at least one avalanche capability enhancement doped region underneath an ohmic contact doped region. Moreover, a source mask is saved by using three masks process and the avalanche capability is further improved.

The invention provides a database access method. The method is executed by a Java database connection (JDBC) server. The JDBC server and the database are deployed in the same network area; the methodcomprises the following steps: receiving access request data from an application program, wherein the access request data is sent by the JDBC client in response to an access request of an applicationprogram for a database, and the access request data is obtained by encrypting and/or compressing a structured query statement and an access parameter carried in the access request by the JDBC client;in response to the access request data, obtaining access response data corresponding to the access request data from a database; and sending the access response data to the JDBC client, so that the application program realizes access to the database based on the access response data from the JDBC client. The invention further provides a database access device which is applied to the JDBC server, electronic equipment and a computer readable storage medium.

The embodiment of the invention provides a long connection recovery method, system and device, electronic equipment and a storage medium, and aims to relieve the high concurrency condition of a reconnection request on a server side and improve the long connection recovery efficiency. The method is applied to a client, and the method comprises the following steps: continuously detecting whether thelong connection between the client and a server is disconnected or not; under the condition that the long connection is not disconnected, receiving and storing a preset time interval sent by the server through the long connection; under the condition that the long connection is disconnected, initiating a first reconnection request to the server in response to the disconnection of the long connection, and determining whether the first reconnection request enables the long connection to be recovered or not; under the condition that the long connection is not recovered by the first reconnectionrequest, randomly determining a waiting time length in the stored preset time interval; after the waiting time length, initiating a secondary reconnection request to the server.

The invention provides a device scheduling method, gateway and system for large-scale access to the Internet of Things. The method comprises the following steps: acquiring current load information andcurrent device connection number of each access node of an Internet of Things cloud platform; when a first allocation request sent by an intelligent device is received, according to a predetermined scheduling rule, the current load information of each access node and the current device connection number, allocating a first access node and a first random connection waiting time to the intelligentdevice, and returning an allocation result to the intelligent device, so that the intelligent device is connected with the first access node according to the allocated information of the first accessnode and the first random connection waiting time; and storing the first access node information and the first random connection waiting time allocated to the intelligent device as device scheduling information. According to the invention, resources of device access nodes are intelligently and dynamically allocated, the problem that large-scale device accesses the Internet of Things cloud platformis solved, and automatic operation and maintenance of device access management are realized.

The invention provides a computer repair control method and system, and a repairing method and system. The repair control method comprises the steps of obtaining a historical repair operation record of a first computer when it is judged that the first computer needs to be repaired; determining a to-be-used repair operation from predetermined multiple-level repair operations according to the historical repair operation record and a predetermined repair strategy; and indicating to perform the to-be-used repair operation on the first computer, and recording the to-be-used repair operation record in the historical repair operation record of the first computer. By virtue of the repair control method, the problem that the repair operation cannot be adjusted according to an actual condition and the problem of overhigh dependency on one-machine monitor accuracy can be solved.

The invention discloses a data cluster storage method and device and computer equipment, relates to the field of data processing, and can solve the problems that when a cluster is used for data storage, rule storage of data in the cluster cannot be guaranteed, the data storage position cannot be quickly positioned, and consequently the storage performance is poor. The method comprises the steps ofobtaining all physical clusters used for storing data; uniformly mapping the physical clusters to physical nodes of a consistent hash ring; determining an optimally stored target physical cluster according to the hash value of the to-be-stored file; and storing the to-be-stored file in the target physical cluster. The application is suitable for cluster storage of data.

The invention discloses an accumulator charging technology and equipment, which is characterized by the following: 1) proceeding charging at 65-75 percent of combination pulse of normal positive and negative pulse charging time dutycycle; 2) increasing negative-pulse charging time in the combination pulse from 80-90 percent through new positive and negative pulse charging time dutycycle; 3) discharging the accumulator in the negative pulse charging condition; 4) repeating 1), 2), 3) charging and discharging courses until the accumulator voltage stabilizes over certain value of standard voltage to finish restoring. The invention can restore combination pulse charging waste lead accumulator of single positive and negative pulse dutycycle, which improves power utility rate.

A memory control method of a physical computer with multi-cloud hosts comprises the following steps: S1, allocating corresponding memory pages for each cloud host, and setting QOS rank value identifications corresponding to cloud hosts in each memory page; S2, obtaining the total physical memory utilization rate; S3, determining whether the total physical memory utilization rate exceeds an upper limit threshold value or not; if yes, executing step4; if not, returning to step2; S4, gradually transferring used memory corresponding to each cloud host from the physical memory to an exchange partition according to a rising order of the QOS rank value identifications in each memory page. The method and system can gradually transfer memories of the cloud hosts with different QOS rank values in the rising order, thus preferably ensuring memory usage of the cloud hosts with high level, and preventing system avalanche caused by overloading.

The feeding apparatus 50 includes a hopper 51 that is provided operable to support the papers in inclined attitude and pivot around a pivot axis 51a, and a feed roller 53 that is provided at a feed roller shaft 54 and feeds the paper to the downstream side by rotating in contact with the paper. When seen from the side view of the feeding path, guide rollers 57 and 58 are provided near the feed roller 53 and are driven to rotate in contact with paper. A movable member, provided near the feed roller 53, pivots around a pivot axis 63a so that the movable member moves backward and forward to the feeding path. Accordingly, a clearance between the feed roller 53 and the hopper 51 is narrowed.

The invention provides a method for blasting centralized recovery lag jambs in several times. The method mainly comprises the steps that the recovered jambs are divided into four sections in the height direction, a drilling drift is dug in the length direction of the jambs, a plurality of drilling crossdrifts perpendicular to the drilling drift are dug in the width direction of the jambs, and the drilling crossdrifts penetrate through the jambs; sector-shaped blasting holes which radiate upwards with the cross sections of the drilling crossdrifts as the circle center are formed above the drilling crossdrifts, and the mined areas on the two sides of the jambs are used as the free faces of blasting; the highest section is blasted first, caved mineral ores are used as a buffering layer, and ore removal is not conducted temporally; then secondary blasting is conducted, the rest sections are blasted at a time; and ore removing is conducted after blasting is over. The jambs are spallationd in several sections and times, the mineral ore buffering layer is formed first, secondary blasting is conducted to cave the upper mineral ores at a time under the protection of the buffering layer, and potential safety hazards caused by large-scale mineral ore caving and ore dilution caused by collapse of hanging side and heading side surrounding rock are also avoided.

The invention provides a lightweight resource virtualization method and a lightweight resource virtualization device for a server. The method comprises the following steps: 1, preparing raw materials;the method comprises the following steps of: (A) setting a container public mirror image which is provided with a kernel layer, an operating system layer, a public component layer, a development language layer and a development framework layer; and (B) analyzing node hardware characteristics and/or task missions according to mirror image layer management information, and preloading a necessary basic common mirror image layer, wherein the kernel layer, the operating system layer, the common component layer, the development language layer and the development framework layer are arranged from bottom to top.

The invention belongs to the field of mine supporting equipment, and particularly discloses a monitoring and coupling integrated protection device for deep mine rock burst. The monitoring and coupling integrated protection device comprises an anchor cable, an anchor rod, an anchor net, arc-shaped steel and a supporting beam, the arc-shaped steel and the supporting beam play a supporting role, the anchor cable and the anchor rod are inserted into a drill hole poured with cement grout in a rock wall, one end of the anchor cable is fixedly provided with a stress sensor used for monitoring rock stratum rock burst, the other end of the anchor cable extends into a first cavity formed in one end of the anchor rod, a hydraulic telescopic rod is installed in the first cavity, and one side of a hydraulic pump is electrically connected with a PLC. The change condition of rock wall rock burst near a mine is monitored in real time through the stress sensor, when the rock burst is increased, the hydraulic pump drives the hydraulic telescopic rod to extend, so that the anchor rod and the anchor cable integrally extend, force unloading is carried out, the anchor rod and the anchor cable are prevented from being fractured due to overlarge stress, when the rock burst is reduced, the hydraulic pump drives the hydraulic telescopic rod to shorten, so that the anchor rod and the anchor cable integrally shorten, and surrounding rock of a roadway is further reinforced.

The invention provides a token-based system flow control method and device, electronic equipment and a storage medium. The token-based system flow control method includes: receiving quasi flow controlconfiguration items configured by a first authority account, wherein the quasi-flow control configuration items include at least token pool information, a token pool flow control manner and a token pool flow control type; using the quasi-flow control configuration items as flow control configuration items after determination from a second authority account; and determining request quantity and concurrence quantity according to the flow control configuration items and real-time data flow for system flow control. The method and the device provided by the invention ensure stability of a system,reduce downtime risks, enhance robustness of services, and improve user experience.

An electrically programmable and erasable non-volatile memory point may have at least one floating-gate transistor connected to a bit line and to a ground line, and may be programmed with a programming voltage. In an erase phase of the memory point, a first, negative, voltage may be applied to the bit line and to the ground line. The absolute value of the first voltage may be smaller than a threshold value of a PN diode. A second positive voltage which is smaller than the programming voltage may be applied to the control gate of the floating-gate transistor. The difference between the second voltage and the first voltage may be equal to the programming voltage, and, in a writing phase, the first negative voltage may be applied to the control gate of the floating-gate transistor, and the second voltage may be applied to the bit line.

The invention provides a micro-service management system and method. The system comprises a load balancing module, a service current limiting module, a link tracking module and a fusing degradation module. According to the micro-service governance method, the pressure of the micro-service node is balanced through a negative feedback control load balancing strategy, and a link tracking identifier is generated through a snowflake algorithm and is implicitly transmitted to the whole link, so that a calling link of the micro-service is completely known; and service current limiting and fusing in a distributed cluster environment are completed by using a current limiting scheme capable of automatically degenerating into single-machine current limiting and a distributed fusing method capable of automatically detecting and reconnecting, so that the availability of a micro-service system is improved.

The invention discloses a grayscale control method and device for data transmission and a medium. The grayscale control method for data transmission comprises the following steps: receiving a use request for data transmitted by a first user from a second user; allowing the second user to use the data; and if the second user does not have the authority level, based on the social behavior of transmitting the data to the second user by the first user, and setting an authority level of the second user, and when a transmission request for the data from the second user is received, determining whether to allow the transmission request based on the authority level of the second user so as to realize gray scale control for the data transmission.

The invention provides an efficient heat dissipation paster type packaging structure, comprising a first heat dissipation substrate, a second heat dissipation substrate and a chip, wherein the chip is provided with a collector, a source electrode and a gate electrode; the collector is in connection with the first heat dissipation substrate; the source electrode or the gate electrode is in connection with the second heat dissipation substrate. The efficient heat dissipation paster type packaging structure also comprises a supporting plate, on which the first heat dissipation substrate and the second heat dissipation substrate are arranged; and a plurality of collector pins which are in connection with the first heat dissipation substrate. The first heat dissipation substrate and the second heat dissipation substrate can timely discharge the heat initially generated by the chip, maintain the operation of the chip under the low temperature environment, and keep blocked impedance and higher power conversion efficiency; the efficient heat dissipation paster type packaging structure can maintain the operation of the chip under the low temperature environment, avoid avalanche, protect elements, and prolong the service life of the elements.

The invention provides a sputtering target in which initial arcing can be prevented and initial stability can be greatly improved and which can be manufactured at a low cost, and provides its manufacturing method. Burr and abrasive dust occurring at working such as grinding and further dust and particles may be removed by sublimation, or the like, by the application of surface treatment using a laser outputted at <=100 mu sec pulse width.