212 results about "Dual source" patented technology

An optical signal manipulation system including: a series of ports for carrying a series of optical signals to be manipulated; a spatial separating means for spatially separating at least a first and a second group of light from the series of optical signals; wavelength dispersion element subsequently spatially separating wavelengths of the first and second series; wavelength processing means for processing separated wavelengths of the first and second series.

Systems and methods for calibrating a temperature sensing system are disclosed. In one respect, a dual light source configuration may be provided. A first light source may illuminate a sensing fiber and an anti-Stokes band may be detected. A second light source may illuminate a sensing fiber and a Stokes band may be detected, where the Stokes band is substantially similar to the anti-Stokes band of the first light source. A ratio between the anti-Stokes and Stokes band may be used to calibrate a temperature sensing system.

An automatic and continuous method is presented to improve the accuracy of fiber optic distributed temperature measurements derived from Raman back scatterings utilizing two light sources with different wavelengths, by choosing the wavelengths of the two sources so the primary source's return anti-Stokes component overlaps with the incident wavelength of the secondary light source thereby canceling out the non-identical attenuations generated by the wavelength differences between Stokes and anti-Stokes bands.

A method of optimizing the operation of the power source of an electric vehicle is provided, where the power source is comprised of a first battery pack (e.g., a non-metal-air battery pack) and a second battery pack (e.g., a metal-air battery pack). The power source is optimized to minimize use of the least efficient battery pack (e.g., the second battery pack) while ensuring that the electric vehicle has sufficient power to traverse the expected travel distance before the next battery charging cycle.

A Renewable Fischer Tropsch Synthesis (RFTS) process produces hydrocarbons and alcohol fuels from wind energy, waste CO2 and water. The process includes (A) electrolyzing water to generate hydrogen and oxygen, (B) generating syngas in a reverse water gas shift (RWGS) reactor, (C) driving the RWGS reaction to the right by condensing water from the RWGS products and separating CO using a CuAlCl4-aromatic complexing method, (D) using a compressor with variable stator nozzles, (E) carrying out the FTS reactions in a high-temperature multi-tubular reactor, (F) separating the FTS products using high-pressure fractional condensation, (G) separating CO2 from product streams for recycling through the RWGS reactor, and (H) using control methods to maintain temperatures of the reactors, electrolyzer, and condensers at optima that are functions of the flow rate. The RFTS process may also include heat engines, a refrigeration cycle utilizing compressed oxygen, and a dual-source organic Rankine cycle.

A dual source real time clock (RTC) synchronization system and method for implementation within automatic meter reading (AMR) systems that provide system-wide device time synchronization while minimizing power consumption by battery-powered devices. In one embodiment, a microcontroller-implemented RTC counts elapsed seconds from a pre-determined system timestamp using a low-speed, low-accuracy crystal. To maintain accurate time and synchronization, a second source is used to compensate for the low-speed, low-accuracy crystal. This second source comprises a high speed, high-accuracy clock in one embodiment. This dual source RTC system can synchronize the endpoint device to within one second of an external reference time signal. Time during communications, thereby providing a relatively low-cost, reduced power consumption synchronization system and method.

The invention discloses a backup automatic switching apparatus with an area automatic switching function, used for a power supply system of a dual-source serial supply structure. The backup automatic switching apparatus comprises an area backup automatic switching device and a plurality of acquisition and execution units, the area backup automatic switching device is configured at any one power supply station or any one serial supply transformer station, the plurality of acquisition and execution units are respectively arranged at two power supply stations and each serial supply transformer station, and all the acquisition and execution units respectively interact real-time information with the area backup automatic switching device through a fiber communication network; and each acquisition and execution unit acquires analog quantity information of the station corresponding to each acquisition and execution unit, after converting the analog quantity information into switching quantity information, uploads the switching quantity information to the area backup automatic switching device, at the same time, receives switching-off and switching-on commands transmitted down by the area backup automatic switching device and executes switching-off and switching-on motion. By using the backup automatic switching apparatus provided by the invention, power supply can be quickly recovered for a power-off serial supply transformer station through switching-off and switching-on operation at a time when any one serial supply switch is taken as an open loop point. The invention also discloses a backup automatic switching method for a backup automatic switching apparatus with an area automatic switching function.

Techniques for providing a pixel cell which includes two source follower transistors. In an embodiment, a first source follower transistor of a pixel cell and a second source follower transistor of the pixel cell are coupled in parallel with one another, where the source follower transistors are each coupled via their respective gates to a floating diffusion node of the pixel cell. In another embodiment, the first source follower transistor and second source follower transistor each operate based on a voltage of the floating diffusion node to provide a respective component of an amplification signal, where the pixel cell outputs an analog signal based on the amplification signal.

The invention discloses a dual-source power supply system and a dual-source power engineering vehicle. The dual-source power supply system comprises a main circuit for power supply of an overhead contact system, a main circuit for power supply of a traction battery, a rectifying module, an inverter module and an auxiliary inverter module, a power supply switching device for receiving a power supply command of the overhead contact system or a power supply command of the battery, and a controller; The dual-source power supply system will not emit polluting gas, so as to meet the low-emission environmental protection requirements of urban rail. Moreover, the dual-source power supply system can be applied to the two power supply modes of the catenary and the traction battery, and the automaticswitching of the two power supply modes can be realized by using the switching instruction of the power supply switching device and the controller. Therefore, when there is a power area, the application can select the power supply mode of the catenary (power supply mode satisfying the power supply mode of the national railway and AC-DC-AC power supply system), which saves power and has higher efficiency; As that power-free zone is entered, the application can be switch to the traction battery power supply mode, and the electric engineering vehicle can still work normally and has high reliability.

A method is disclosed for removing a polysilicon layer from a semiconductor wafer, in which a downstream plasma source is used first to planarize the wafer, removing contours in the polysilicon layer caused by deposition over lithographic features, such as via holes. The planarizing process is followed by exposure to a plasma made by a direct, radio frequency plasma source, which may be in combination with the downstream plasma source, to perform the bulk etching of the polysilicon. The invention can produce planar surface topography after the top layer of the film is removed, in which the residual recess height of the polysilicon plug filling a via hole is less than about about 10 nm.

The invention relates to a switching control method of a dual-source emergency electric power steering system. The dual-source emergency electric power steering system comprises a vehicle controller,a high-pressure booster system, a low-pressure booster system, and a steering oil pump. The high-pressure booster system comprises a power battery pack, a DCAC controller, and a high-pressure pump motor. The low-voltage booster system comprises a 24V battery, a 24V emergency controller, and a low-pressure oil pump motor. When the vehicle is running, the high-pressure booster system is turned on, and the 24V emergency controller monitors the rotation speed of the high-pressure pump motor and receives the enabling signal of the steering oil pump; when the current rotation speed of the high-pressure pump motor is less than the previous speed, and the speed difference is greater than the set threshold, and an enabling signal of the steering oil pump is still received, then it is determined that the high-pressure booster system is abnormal, and the 24V emergency controller automatically starts the low-pressure booster system to drive the steering oil pump, thereby achieving a smooth switching between the high and low pressure booster system to avoid the time delay caused by the process of sending the emergency start command by the vehicle controller.

A method for fabricating a non-volatile memory having boost structures. Boost structures are provided for individual NAND strings and can be individually controlled to assist in programming, verifying and reading processes. The boost structures can be commonly boosted and individually discharged, in part, based on a target programming state or verify level. The boost structures assists in programming so that the programming and pass voltage on a word line can be reduced, thereby reducing side effects such as program disturb. During verifying, all storage elements on a word line can be verified concurrently. The boost structure can also assist during reading. In one approach, the NAND string has dual source-side select gates between which the boost structure contacts the substrate at a source/drain region, and a boost voltage is provided to the boost structure via a source-side of the NAND string.

The invention discloses a full-digitalization system for collecting and processing engineering dual-source surface wave exploration data, comprising a host, digitalized low-frequency wave detectors, a cable interface unit, an operation control unit, a digital cable, a seismic focus trigger line assembly and a storage battery cable assembly, wherein a data link is composed of the digitalized low-frequency wave detectors; the data link is connected with the input end of the host via the digital cable and the cable interface unit; the host and the operation control unit are connected; the seismic focus trigger line assembly is connected with an artificial source and the host; the storage battery cable assembly is connected with a storage battery, the host and the data link; the digitalized low-frequency wave detectors are used for collecting a surface wave signal of the artificial source and a surface wave signal of a natural source and carrying out analog-to-digital conversion on the collected signals; and the processed signals are transmitted to the host by the digital cable via the cable interface unit and are processed by the host. According to the full-digitalization system, thesurface wave data of the artificial source can be collected and processed, and the microseisms data of the natural source can be collected and processed. The same system can be used for exploring therange from the ground to a position which is 300m below the ground, and even can be used for exploring with the depth below 1000m.

The invention relates to a power converter for a switched reluctance motor of a battery-supercapacitor electric vehicle. According to the invention, a power converter topology, in which a battery and a supercapacitor are cascaded with an asymmetry half-bridge circuit of the switched reluctance motor through a three-switch series dual-input DC-DC converter, is adopted to act a main power converter of a battery-supercapacitor hybrid power electric vehicle switched reluctance motor driving system, a source end DC-DC converter can realize dual-source access of the battery and the supercapacitor, a rear-stage asymmetry half-bridge power converter is enabled to be adjustable in bus voltage, and a rear-stage asymmetry half-bridge power circuit can realize driving control for the switched reluctance motor. The power converter provided by the invention can realize requirements of battery-supercapacitor dual-storage energy input control and switched reluctance motor driving control simultaneously. In addition, the power converter effectively saves switch tube resources, can further reduce the system cost and the size, and has the advantages of high integration, light weight, low cost and the like.

The invention discloses a dual-source image feature extraction and fusion identification method based on a convolution neural network, which comprises the following steps: utilizing the characteristics of the convolution neural network with migration learning, training the convolution neural network model parameters through a large number of visible light databases; The trained model is used to automatically extract the hidden features of visible and thermal infrared target images, and the maximum desampling method is used to reduce the feature dimension. Combining Fisher discriminant method and principal component analysis algorithm, the dimension reduction and fusion of multi-source image features are carried out. Support vector machine classifier is used to classify and recognize the fusion features of the target image. A method for classify and identifying multi-source image target in unmanned aerial vehicle (UAV) platform features that image hidden features are extracted by convolution neural network, and Fisher discriminant method and principal component analysis algorithm are combined for dimension reduction and fusion of features, which provides a new and effective way forclassifying and identifying multi-source image targets based on feature level.