208results about How to "Guaranteed load" patented technology

Disclosed is a magnetic-absorption wall-creeping robot with a self-adaptive capability to curved face, which belongs to the art of robot. Said robot comprises a wheeled shifter and a plural of permanent-magnet absorption devices, the wheeled shifter containing an undercarriage, a drive gear, a traction wheel and an auxiliary balancing wheel; one end of the permanent-magnet absorption device being equipped with the magnetic conduction wall surface by auxiliary balancing wheel, and the other end equipped with the undercarriage or other permanent-magnet absorption device by curved face self-adaptive device with rotational freedom degree of among one to three; the traction wheel being laid out symmetrically and driven by differential drive, and the differential of the traction wheel realizing the deflecting on the magnetic conduction wall surface. The wall-creeping robot having a strong loading power, a flexible motility and a super self-adaptive capability to curved face, has a perfect prospect.

The invention relates to a method for preparing an epoxide and mainly resolves the problems in the prior art such as the low activity of catalysts for production of the epoxide, poor effect of mass transference, and high cost of production. The invention well resolves the problems through adopting the technical proposal which selects cheap organic amine as a template with shorter crystallization time, carries titanium through posterior synthesis in the presence of inertia gas, grafts inorganic titanium to silicon dioxide framework with a hexagonal mesoporous structure to form a substance of active titanium with four coordinating structure, and carries out alkylation treatment to produce a catalyst of the epoxide. The method provided by the invention can be applied to the industrialized production of the epoxide.

The embodiment of the invention provides a control method and device. The method includes the following steps that when a BBU determines that the network quality of a first cell in multiple cells which are covered by the BBU is reduced, the load information of the first cell is determined; when the load of the first cell is smaller than a first load threshold, the second cell which has the strongest signal interference with the first cell in adjacent cells of the first cell is determined according to the signal strength of RRUs; the RRU of the first cell is combined with the RRU of the second cell and a combined cell is obtained. By means of the control method and device, the network quality is improved and network experience of a user is improved.

The invention discloses a massive data storage method based on file granularity. The massive data storage method comprises the following steps of (1) dividing a data storage cluster into a plurality of partitions, wherein each partition is provided with a partition value; (2) creating a business data sheet for the record of each department, and setting a partitioning rule for the records of each business data sheet; (3) for each record in the to-be-stored business data, storing into a file of the corresponding partition according to the number and a partitioning rule, and creating an index file; storing the number of the record, the path of the file, the number of a storage node, and the number of storage equipment into a metadata file; furthermore, creating a view between the business data sheets; according to the metadata file, separating the business data sheet, the view, the record partition and the index information belonging to the same business scene into the same database, so as to obtain a massive metadata management model. The massive data storage method has the advantages that the data management accuracy is improved, and the data division and organization flexibility is improved.

An RPF Neighbor having the least traffic flow is estimated and a multicast distribution path via the RPF Neighbor is selected so as to split the load between routers constituting the Equal-cost Multipath and lines.

The invention relates to the technical field of power generation systems, in particular to a household grid-connected inverter control strategy based on a virtual synchronous generator. A mathematic model of the virtual synchronous generator is introduced into a grid-connected inverter, a control method of the synchronous generator is added to a control link of the grid-connected inverter, the grid-connected inverter is used for island detection, and when the power grid side breaks down, the grid-connected inverter can be quickly switched to an off-grid operation state. By the adoption of the control strategy, the household medium-small-generated output grid-connected inverter is equivalent to the synchronous generator from the aspects of input and output characteristics, and the inverter can actively participate in coordination control over the voltage and the frequency of a power system.

The invention discloses a method for detecting and handling load faults of a power amplifier. The method comprises the following steps of providing real-time parameters through current and voltage detection, thereby calculating to obtain online power and impedance curve data as the basis of reducing output power or short-circuit protection states. The invention further discloses a device for detecting and handling load faults of the power amplifier, and the device comprises a current detecting module, a voltage detecting module, and a DSP/MCU (digital signal processor/micro controller unit) module. According to the method and the device, when a sound system is installed, and the power amplifier can distinguish whether the load impedance is normal and performs corresponding adjustment, thereby ensuring that the load on the circuit meets the output impedance of the power amplifier; when the sound system is normally used, load power and impedance of the power amplifier are monitored and automatically treated when the output circuit of the power amplifier or a loudspeaker emerges questions. According to the method and the device, the load is automatically disconnected in a short-circuit state and automatically connected after the short circuit is eliminated, the output power is automatically reduced in overload so that the sound cannot be interrupted and the output power can be automatically recovered after the overload is eliminated.

The invention discloses an LED drive circuit and an LED lamp. The drive circuit is connected with a power source and an LED load and comprises a temperature detection unit, a temperature control unit, a constant-current integrated output unit. The temperature detection unit is connected with the temperature control unit. The input end of the constant-current integrated output unit is connected with the temperature control unit. The output end of the constant-current integrated output unit is connected with the LED load. The temperature control unit is connected with both the temperature detection unit and the constant-current integrated output unit. The temperature control unit controls the constant-current integrated output unit to output to operating current of the LED load according to the temperature of the LED load, detected by the temperature detection unit. The temperature detection unit comprises a thermistor R12. One end of the thermistor R12 is earthed, and the other end of the thermistor R12 is connected with a temperature detection pin of a single-chip microcomputer chip in the temperature control unit.

The invention, which relates to the technical field of the internet of things, particularly discloses an internet-of-things-sensing-equipment-based cloud platform authentication system and method. The system is composed of a cloud platform control center, cloud authentication terminals, and a cloud platform authentication gateway. The cloud platform control center distributes the cloud authentication terminals to internet-of-things sensing equipment; the cloud platform authentication gateway carries out grouping and numbering on the internet-of-things sensing equipment according to the types of the internet-of-things sensing equipment; and the cloud authentication terminals carry out batch authentication on one group of sensing equipment. When lots of internet-of-things sensing equipment makes a request for authentication simultaneously, a cloud calculation platform distributes the cloud authentication terminals to the internet-of-things sensing equipment, the cloud platform authentication gateway carries out grouping on the internet-of-things sensing equipment, and the cloud authentication terminals carry out batch authentication on the group of internet-of-things sensing equipment and return the authentication results to the authentication gateway. Therefore, the authentication efficiency is improved; stability of the cloud calculation platform is guaranteed; and a network authentication storm caused by simultaneous authentication requesting by massive nodes can be avoided.

The invention discloses a digital illumination control system. The digital illumination control system comprises a monitoring center group network, a remote PC (Personal Computer) monitoring end, an Internet network module, a GPRS/CDMA (General Packet Radio Service)/(Code Division Multiple Access) data module, and a site equipment terminal, wherein a monitoring module and the remote PC monitoring end are connected with the site equipment terminal by the Internet network module and the GPRS/CDMA data module; the whole service processing is divided into three parts: an interaction part of an intelligent streetlamp monitoring system, an access management and instruction analysis part and a carrier acquisition control part of a concentrator. The digital illumination control system disclosed by the invention has the advantages that due to adoption of a real-time and reliable online fault detection technology, the working efficiency is greatly improved, and the labor intensity is furthest reduced; control is carried out by time sharing and grouping according to different seasons; after a control strategy is downloaded to the concentrator, when a network signal is interrupted, the functions of timed switching on/off and light adjustment of the streetlamp also can be executed accurately; the functions of road inspection, fault early warning, fixed-point maintenance and illumination as well as unattended operation are realized, so that the maintenance cost is reduced and the digital management capability is improved.

An offset drive link assembly for transmission and multiplication of torque from a power tool for tightening or loosening a threaded fastener includes: a drive force input assembly; a drive force output assembly; and a reaction force assembly. Advantageously the offset drive link assembly: allows access to previously unreachable fasteners due to, for example protruding threads, limited clearances and obstructions; makes practical previously unusable devices driven either electrically, hydraulically, manually and/or pneumatically; makes feasible previously unusable advanced materials, such as, for example aircraft-grade aluminum; creates modular components, such as, for example hex-reducing and -increasing drive bushings, male to female drive adaptors, to meet bolting application characteristics; yields accurate and customizable torque multiplication; tames drive force and reaction force application; overcomes corrosion, thread and facial deformation; avoids bolt thread galling; nullifies side load; ensures balanced bolt load for symmetrical joint compression; simplifies link and tool use; minimizes risk of operator error; and maximizes bolting safety.

The invention provides a data transaction-oriented trusted processing method and system, which are applied to a P2P network system, and the P2P network system comprises a plurality of nodes; the trusted processing method comprises a storage method and a query method, firstly, a directed acyclic graph account book structure is adopted in the storage process to be matched with an nRW consensus mechanism, and the supervision problem in the large-scale sharing exchange process is solved; secondly, in the query process, a P2P network system is optimized by maintaining a tree structure with high fault tolerance and load balance and adopting a hop count optimization method to construct the P2P network system with a relatively balanced network, so that the query delay is not greatly influenced onthe premise of ensuring the load balance, and the expandability of the system is ensured; and a delay optimization and neighbor node management protocol method is adopted, so that the query message can be received by the lower-layer node under the condition that the upper-layer node is down, and the node leaving the network can be dynamically replaced by a new online node.

The invention provides a high speed regular expression matching hybrid system and method based on FPGA and NPU (field programmable gate array and network processing unit); the system is mainly composed of an FPGA chip and a multicore NPU; a plurality of parallel hardware matching engines are implemented on the FPGA chip, a plurality of software matching engines are instantiated on the NPU, and the hardware engines and the software engines operate in running water manner. In addition, a high speed RAM (random-access memory) on the FGPA chip and an off-chip DDR3 SDARM (double-date-rate three synchronous dynamic random-access memory) are used to construct two-level storage architecture; secondly, a regular expression rule set is compiled to generate a hybrid automaton; thirdly, state table items of the hybrid automaton are configured; fourthly, network messages are processed. The high speed regular expression matching hybrid system and method based on FPGA and NPU have the advantages that matching performance under complex rule sets is improved greatly, and the problem that the complex rule sets have poor performance is solved.

The invention discloses a multi-mast movable-type lifting operating platform used for construction, belonging to a lifting device. The existing mast-type lifting operating platform can not satisfy the building construction requirement. The operating platform comprises a base frame, a steering walking device arranged at the lower side of the base frame, and a supporting device arranged on the base frame. The invention is characterized in that at least two pairs of masts are distributed on the base frame, and are commonly connected with a connecting frame; and a connecting frame is provided with a rotating support which can be driven by a motor and the rotating support is connected with the operating platform. The operating platform can steer and walk through the steering walking device, can ensure the stability through a supporting device, and can be rotated through the rotating support, thus the operating platform can be moved to the proper position for construction as required in using, is especially suitable for roof panel laying construction in the steel structural building and the laying construction of vertical-face maintaining plates.

The embodiment of the invention provides a method, a device and a system for paging a heterogeneous network, which belongs to the communication field. The method comprises the following steps: reporting an interference report to a base station in which an interfered cell resides when the condition of reporting interference is satisfied so that the base station in which the interfered cell resides can generate and send a paging configuration updating message according to the received interference report; and receiving the paging configuration updating message generated and sent by the base station in which the interfered cell resides, and updating the paging configuration to the paging configuration which can avoid the interference according to the paging configuration updating message. The invention further provides a terminal device, a communication device and a communication system. In the scene of the heterogeneous network, under the condition that the interfering cell configures is approximately configured with vacant sub-frame so as to ensure the load thereof and reduce the signaling overload on the interface at the rank of the cell (or base station), the interfered UE (User Equipment) in the interfered cell can also receive the paging message through the method.

The invention provides a ceramic power composition, which comprises 55-95% of alumina and further comprises one or more the following components: 5-35% of feldspar powder, 5-35% of kaolin, 5-25% of zirconia, 1-10% of titanium oxide and 0.5-5% of calcium oxide. The invention further provides ceramic slurry, a ceramic catalyst carrier prepared from the slurry and application of the carrier and the catalyst in a high-viscosity reaction system. The invention overcomes the defects of poor stability, serious inactivation phenomenon, low reaction conversion rate and the like of the traditional catalyst in the reaction of the high-viscosity system, the aperture ratio of the ceramic catalyst carrier is greatly improved compared with the prior art and can even reach a millimeter scale, and meanwhile, the ceramic catalyst carrier can be maintained with higher specific surface area inside, has the properties of uniform pore opening, high porosity, heat and shock resistance, high-temperature resistance and chemical corrosion resistance, as well as excellent mechanical strength and adsorption property, can be maintained with high stability in a reaction process, can improve the conversion rate in the reaction, and is particularly suitable for the high-viscosity reaction system.

The invention discloses a bionic flexible mechanical arm operated facing to a narrow limit space, and aims to solve the technical problems that a flexible mechanical arm mentioned in a background technology has multiple problems so as to be difficult to widely use in engineering and incapable of operating in a narrow space. The invention adopts the technical scheme that the bionic flexible mechanical arm operated facing to the narrow limit space comprises at least one sub joint, wherein each two adjacent sub joints are connected; each sub joint comprises an upper operation surface and a base;and three universal connecting units are arranged between each upper operation surface and each base. The bionic flexible mechanical arm operated facing to the narrow limit space is characterized by using a three-rod-shaft parallel platform as the sub joint of the flexible mechanism arm, so that a single sub joint has more freedom degrees; and a single joint is supported by three threaded rods, sothat the rigidity and the carrying capacity of the flexible mechanical arm are ensured.

A parallel changeover control system with closed-loop switch-off protection comprises a first executing switch, a first adapter, a second executing switch, a second adapter, a third executing switch, a third adapter, a controller, a first transformer H1, a second transformer H2 and a third transformer H3. The parallel changeover control system with closed-loop switch-off protection, which is provided by the invention, has the functions of automatic switching and automatic recovery, automatic switching and non-automatic recovery, manual, local and remote node control, remote control and the like as well as a parallel changeover function with closed-loop switch-off protection. Parallel changeover can ensure that two routes of power supplies can be switched without power interruption, the closed-loop switch-off function can ensure that a circuit breaker can be instantly switched off when current is overhigh in the process of parallel changeover, and thereby a circuit and loads can be protected.

The invention requests a protection for a method and apparatus of combined optimization of MLB (mobility load balance) and MRO (mobility robustness optimization) in an LTE-A heterogeneous network, relates to the technical field of heterogeneous networks, and discloses an effective method which mainly aims at MLB optimization and also takes MRO optimization into consideration. In the LTE-A heterogeneous network, simple MLB execution or MRO execution may deteriorate the performance of the entire network, and if MLB execution and MRO execution both exist in a self-optimization module of the network, the same switch parameter may be adjusted to an opposite direction to lead to switch conflicts when algorithms of both the MLB and the MRO are executed since switch parameters of the MLB and the MRO will be adjusted. Therefore, improvements are made mainly from three aspects: firstly, a method of finding an optimum load distribution scheme on the basis of a cluster theory to determine load states of all nodes; secondly, a method of determining switch optimization types through relevant theories of a decision-making tree; and thirdly, a method of combined adaptive adjustment on relevant parameters of the MLB and the MRO according to a known decision.

The invention relates to a high-power sealed alternating current contactor. The shell of the high-power sealed alternating current contactor is fixed on a pedestal, an input terminal and an auxiliary output terminal are fixed on the shell, a main output terminal is fixed on the pedestal, and a main output stationary contact is fixed at the inner end of the main output terminal; a suction type electromagnetic mechanism is fixed on the pedestal through a bracket and positioned at the middle part in the shell, and a rectifying part is arranged on the bracket; the upper part of the moving end of the suction type electromagnetic mechanism is connected with a pushing ring, the lower part is connected with a main output moving contact, and the main output moving contact is positioned over the main output stationary contact; a coil-controlled normally closed contact and an auxiliary output normally open contact are arranged above the suction type electromagnetic mechanism and controlled through the pushing ring; and the input terminal is connected with the rectifying part, the rectifying part is connected with the suction type electromagnetic mechanism, the coil-controlled normally closedcontact is connected with the control end of the suction type electromagnetic mechanism, and the auxiliary output normally open contact is connected with the auxiliary output terminal. The invention has the characteristic of compact structure, impact resistance, large loading capability and the like and is particularly suitable for switching circuits in ships and other high-power military equipment.

A stream media system based on P2P technology is composed of a network management server, a video server, communication networks and terminal users, who can either receive or transfer contents, in which, comunication networks deal with data packets of different priorities and key frame data of audio and video are transmitted in prior, data of ordinary frames are transmitted within the allowing sphere of overtime and those beyond is cast off, so it's only necessary to use few server resources to build up a huge stream media system.