40results about How to "Limit power" patented technology

The invention provides a session-based bi-directional multi-tier client-server asynchronous information database search and retrieval system for sending a character-by-character string of data to an intelligent server that can be configured to immediately analyze the lengthening string character-by-character and return to the client increasingly appropriate database information as the client sends the string.

Systems and methods for providing radio frequency transceiver user equipment in a packet based radio frequency signaling communication system are disclosed. User equipment is provided with closed subscriber group “CSG” capability including permanent storage for a CSG whitelist, the whitelist including identifiers of CSGs the user equipment is a member of. Base stations transmit signals including identifiers corresponding to CSGs the base station supports. The base station or cell selection process performed by the user equipment includes selecting cells that are part of the CSG whitelist. In additional embodiments, the user equipment includes user alterable storage for a user controlled CSG whitelist. The user alterable storage may further be partitioned into permanent and temporary portions. In an exemplary method, the user controls the cell selection process using the CSG whitelist information stored in the user equipment. Methods for managing the CSG whitelist are described.

Disclosed is a light-emitting diode drive device that improves the utilization efficiency and power factor of LEDs while maintaining power supply efficiency. Said light-emitting diode drive device is provided with: a rectification circuit (2) that can be connected to an AC power supply and rectifies the AC voltage from said AC power supply into a pulsed voltage; a first LED block (11) comprising a plurality of light-emitting diodes, a second LED block (12) comprising a plurality of light-emitting diodes, and a third LED block (13) comprising a plurality of light-emitting diodes, connected sequentially in series to the output side of the rectification circuit (2); a first switching means that turns a first bypass path (BP1), which bypasses the second LED block (12), on or off on the basis of the amount of power supplied to the first LED block (11); and a second switching means that turns a second bypass path (BP2), which bypasses the third LED block (13), on or off on the basis of the amount of power supplied to the first LED block (11) and the second LED block (12).

A base station captures phase difference information between a long period spreading code of a common control channel of the base station and a long period spreading code of a common control channel of a neighboring base station of the base station from a mobile station. The base station transmits the phase difference information to a mobile station. The mobile station carries out cell search in accordance with the received phase difference information.

The invention discloses a role-based-access-control (RBAC)-model-based hierarchical authorization method. The method comprises: in a hierarchical organization architecture, a hierarchical administrator of an organization unit is provided for completing role-association-based authorization; an authorizable role of a hierarchical administrator is limited to originate in an authorizable role set of the origination unit; the hierarchical administrator maintains an authorizable role set of a sub organization unit; the hierarchical administrator designates a hierarchical administrator of the sub organization unit; and a system administrator designates a hierarchical administrator of a top unit of the organization architecture and initializes an authorizable role set associated with the top unit. According to the method disclosed by the invention, the hierarchical administrators are provided for all organization units in the organization architecture and the authorizable roles are limited, so that the hierarchical authorization administration can be realized, the authorization process can be optimized, and the system security can be guaranteed.

The invention discloses a secure file management system and method capable of achieving read/write splitting. The system and method are used for solving the problem of a traditional electronic file management system that the read privilege and write privilege of a file are not split. The system is composed of a credible authorized agency TA, a service provider, a file owner, a file approver and a file reader. The method comprises the steps of system initialization, identity registration, secret key distribution, encryption, service requesting, request response returning and file processing. According to the system and method, the file reading privilege of the file approver and the file reader is controlled by controlling the distribution of file reading secret keys, the file acquiring privilege of the file approver and the file reader is controlled by controlling the distribution of inquiring secret keys, the file writing privilege of the file approver is controlled by controlling the distribution of writing secret keys, and then file read/write privilege splitting is achieved.

The invention discloses a fast charging switching circuit and method based on dual-interface plugging detection. The circuit comprises a power supply end, a rectification transformation circuit, a control system, a USB Type-A interface and a USB Type-C interface. A filtering degaussing circuit is connected between the rectification transformation circuit and the USB Type-A interface and between the rectification transformation circuit and the USB Type-C interface. The USB Type-A interface and the USB Type-C interface are connected with a switch unit. The control system is connected between therectification transformation circuit and the USB Type-A interface as well as between the rectification transformation circuit and the USB Type-C interface, and the control system comprises a fast charging control unit and a plugging detection unit. The method is applied to the circuit. According to the invention, the design cost of the circuit can be saved, the detectable equipment range is expanded, the scene switching is more efficient and time-saving, and the quick charging requirement is better met.

A role-based permission control mechanism relates to the technical field of role-based access control, and in particular to a mechanism for database resources indirectly accessed by distributing a system application packaging access permission to a role and endowing a user with the role. The role links the user and the permission as an intermediate medium, the user indirectly accesses the database resources through the role. Role permission distribution of an access control model is to distribute an operation permission of a system function item of an application program layer to the role, the role controls the database resources through the function item of the operation system. The embodiment of the invention provides the role-based permission control mechanism which is a scheme for unified realization of the role-based permission management of the whole system in the application program layer. The database resources are indirectly accessed by distributing the system application packaging access permission to the role and endowing the user with the role, the burden and the cost of permission management are greatly reduced so that the permission management of the system is highly flexible.

The invention discloses an air speed step indicating circuit of an electric fan. The circuit comprises a single-pole multi-position switch, wherein a common terminal of the single-pole multi-position switch is connected with one pole of a power supply; each terminal is connected with each speed adjusting tap of a motor winding of the electric fan; the circuit is characterized in that: each terminal of the switch is connected with each speed adjusting tap of the motor winding of the electric fan through a low-impedance circuit; the low-impedance circuit is a parallel circuit consisting of a plurality of branches, of which one branch is one light emitting diode or is formed by connecting one light emitting diode and other elements in series; and the low impedance is within 5 percent of the impedance of a corresponding speed adjusting tap loop of the motor winding of the electric fan. Through the design, the two-pole multi-position switch in the prior art can be substituted by the single-pole multi-position switch, so that the structure is simplified, and the cost and the failure are reduced.

The invention relates to the field of biochips, and discloses a process for fixing a macromolecular substance on a chip, the process comprises a chip activation step, a chip film forming step and a chip crosslinking step, and the chip comprises an electrode plate; in the chip activation step, air is used as a medium to carry out plasma cleaning on a chip, and an activated chip is obtained; and in the chip film forming step, APTES is covered on the electrode plate, and the chip after film forming is obtained. According to the invention, the biomolecules can be well fixed on the chip, especially well fixed on the electrode plate of the chip, so that the chip can be used in a biochip detection method based on electrical detection, and the development of the biochip detection method based on electrical detection is promoted. In addition, the finished chips produced in the same batch are stable in quality and good in repeatability.

The invention provides a control method and device for a power system and the power system.The power system comprises a steam turbine and a compressor, the steam turbine is used for driving the compressor, the compressor comprises an air inlet guide vane valve, and the control method comprises the following steps that the current rotating speed of the steam turbine is obtained; and when the current rotating speed exceeds the first preset range, the calculated opening degree of the air inlet guide vane valve is adjusted, so that the current rotating speed is within the first preset range. According to the embodiment of the invention, the load of the power system and the corresponding actual steam consumption amount can be adjusted according to the opening degree of the air inlet guide vane valve of the compressor, so that the steam consumption amount is ensured to be limited within the maximum steam supply amount; and shutdown caused by steam turbine stall due to maximum steam supply limitation and mismatching of the whole machine power is avoided, and shutdown caused by compressor surge is also avoided.

Automatic machining equipment for a chain saw carburetor body relates to the technical field of chain saws and comprises a fixing frame, the fixing frame plays a role in fixing all parts, the right side of the fixing frame is movably connected with a clamping plate, and the clamping plate plays a role in making contact with a workpiece to be machined and clamping the workpiece to be machined. The right side of the fixing frame is fixedly connected with a first spring fixedly connected with the left side of the clamping plate. According to the automatic machining equipment for the chain saw carburetor body, through use of the power generation mechanism and the disconnection mechanism, when a clamping device is loosened, violent shaking occurs in machining, the power generation mechanism generates electric energy, an electromagnet in the disconnection mechanism is powered on at the moment, the powered-on body shrinks leftwards under the action of magnetic attraction, and the first contact and the second contact are separated, so that a circuit of machining equipment is disconnected, mistaken machining of a workpiece is effectively avoided, and compared with an existing machining equipment clamp, the electric power resource is saved, and meanwhile the machining efficiency is effectively improved.

System for operating an electric heating element provided on a motor vehicle equipped with an electric motor power unit comprising at least one electric motor, the electric heating element comprising a heat transfer fluid circuit, the operating system comprising means for limiting Means (2) for the power consumed by the electric heating element and means (3) for regulating the temperature, which cooperate so as to depend on the temperature measurement of the heat transfer fluid of the electric heating element, the temperature data of the heat transfer fluid of the electric heating element, the electric heating The power measurement of the element and the authorized power of the electric heating member issue a control signal.

The invention provides a photovoltaic power station power control method and system. The photovoltaic power station power control method comprises the following steps: step 1, acquiring basic data of a photovoltaic power station to be detected; step 2, setting operation parameters of the photovoltaic power station to be tested; step 3, calculating an active power change value of the photovoltaic power station to be tested and the total input number of inverters of the photovoltaic power station to be tested; 4, controlling the power of the photovoltaic power station according to the real-time power of the to-be-tested photovoltaic power station and the target set value of the power of the to-be-tested photovoltaic power station in combination with the active power change value of the to-be-tested photovoltaic power station obtained in the step 3 and the total input number of inverters; according to the invention, power lifting and lifting speed limitation of the photovoltaic power station can be realized on a photovoltaic power station control system, and the operation cost of the power station is controlled.

The invention mainly relates to a DC and brushed rotating electrical machine (10) for traction, comprising an armature (12) formed by a rotor provided with a winding and an inductor (11), characterised in that the inductor (11) has a separate excitation coil, through which an inductor current (Is) passes that is independent of an armature current (Ir), and in that the inductor (11) is capable of discretely generating, by selecting coils (B1, B2, B3) through which the inductor current (Is) passes, at least three different magnetic flux levels each corresponding to a traction mode (M1, M2, M3) of the rotating electrical machine.

The invention discloses a modular ultra-low-nitrogen gas water heater. The water heater comprises a box body, a partition plate dividing the box body into an upper cavity and a lower cavity is fixed to the inner side of the box body, a control panel is fixedly connected to one outer side of the box body, two sealing plates are arranged on the side, perpendicular to the control panel, of the box body, supporting plates are fixedly connected to the top side of the partition plate and the inner bottom side of the box body, a modular combined structure is arranged on the top sides of the supporting plates, a flue gas emission structure is connected to one side of the modular combined structure, and the modular combined structure comprises pressurizing circulating water pumps, a connecting pipe, an electromagnetic control valve, a water inlet pipe, a water outlet pipe, modular furnaces, a middle connecting pipe and a combustor. According to the water heater, through grading adjustment of mutual cooperative use of the multiple pressurizing circulating water pumps, the water pressure of the water heater is guaranteed, meanwhile, the power of the pressurizing circulating water pumps is greatly limited, resource waste of the pressurizing circulating water pumps is prevented, and through modular treatment of the water heater, the continuous water supply capacity during maintenance is guaranteed.