Abstract: A fault current limiting control and protection coordination method for a converter of a flexible direct current transmission system operating in an islanding state, wherein the current output command limit Imax is used to limit the current commands I*Ldq of inner loop dq currents, and in the event of the fault of AC system, Imax is set equal to or slightly larger than a value for an AC line overcurrent protection section III. The value for the II section of the converter bridge arm overcurrent protection is smaller than the value for the II section of the AC line overcurrent protection or the value is equal; the set value for AC line overcurrent protection section I is smaller than the set value for converter bridge arm overcurrent protection section I; the value for proximal AC line overcurrent protection section II is less than or equal to the value for converter bridge arm overcurrent protection section II, and under such condition, the delay is longer than the AC line overcurrent protection section II.

Abstract: A lithium ion battery electrode includes an electrode material layer. The lithium ion battery electrode further includes a current collector. The current collector is located on a surface of the electrode material layer. The current collector is a carbon nanotube layer. The carbon nanotube layer consists of a number of carbon nanotubes.

Abstract: A method of searching tree-structured data can be provided by identifying all labels associated with nodes in a plurality of trees including the tree-structured data, determining which of the labels is included in a percentage of the plurality of trees that exceeds a frequent threshold value to provide frequent labels, defining frequent candidate sub-trees for searching within the plurality of trees using combinations of only the frequent labels, and then searching for the frequent candidate sub-trees in the plurality of trees including the tree-structured data using a plurality of pruning kernels instantiated on a non-deterministic finite state machine to provide a less than exact count of the frequent candidate sub-trees in the plurality of trees.

Abstract: A method for making a battery electrode is provided. A carbon nanotube material is provided. The carbon nanotube material is placed into a furnace containing carbon dioxide. The furnace is heated to a temperature about 800° C. to about 950° C., and the carbon nanotube material is oxidized. The oxidized carbon nanotube material is dispersed in a first solution to form a carbon nanotube suspension. An active material is ultrasonically dispersed in a second organic solvent to form an active material dispersion. The carbon nanotube suspension is mixed with the active material dispersion to form a second solution. The second solution is stirred by ultrasonic means and dried after filtering.

Abstract: A method for oxidizing multi-walled carbon nanotubes is provided. At least one multi-walled carbon nanotube is provided. The at least one multi-walled carbon nanotube is placed into a heating furnace filled with carbon dioxide gas. The heating furnace is heated to a temperature ranged from about 800° C. to about 950° C., and the at least one multi-walled carbon nanotube is oxidized in the carbon dioxide.

Abstract: Provided is a method for controlling a zero sequence voltage of a voltage source converter. When an alternating current system ground fault occurs, a zero sequence voltage at an alternating current (AC) side or a zero sequence voltage at a direct current (DC) side of a converter is detected. If the detected zero sequence voltage is greater than a set value V0ref, a DC side voltage of the converter can be increased to a set value Udc0, thereby generating an appropriate reference wave at the AC side of the converter to match an AC voltage, and accordingly controlling overmodulation of a reference wave at a faulty station to suppress fluctuation of a DC voltage.

Abstract: According to a first aspect of the present disclosure, there is provided a method for processing a communication message. The method includes: acquiring a communication message transmitted between a first terminal and a second terminal; and sending prompt information to at least one of the first terminal and the second terminal when the communication message includes a predetermined schedule word, the predetermined schedule word being relevant to scheduling an appointment, the prompt information including information for reminding a user of the at least one of the first terminal and the second terminal to acquire contact information of a user of the other terminal.

Abstract: In accordance with some embodiments of the present invention, systems and methods that protect an application from attacks are provided. In some embodiments of the present invention, input from an input source, such as traffic from a communication network, can be routed through a filtering proxy that includes one or more filters, classifiers, and/or detectors. In response to the input passing through the filtering proxy to the application, a supervision framework monitors the input for attacks (e.g., code injection attacks). The supervision framework can provide feedback to tune the components of the filtering proxy.

Abstract: A series compensation device suitable to double-circuit lines is disclosed. The device includes one series transformer and one converter. One converter and dual-circuit transmission lines are respectively connected to three windings of one series transformer. In the solution provided in the present application, the device can be independently installed in a power transmission system to be used as a static synchronous series compensator, and can also be used as a component of a unified power flow controller, a convertible static compensator, an interline power flow controller and a unified power quality conditioner to be connected to a power transmission system device in series. The device can save the capacity of a converter, improve the application efficiency of the series compensation device, and reduce the cost and area occupation.

Abstract: The invention relates to an electrical multichannel system (100) and to a neural stimulation and/or recording device comprising such a system. The multichannel system comprises a plurality of application components (130), e.g. stimulation electrodes, and associated access points (120) that are connected by a plurality of electrical lines (110). The resistances of these lines are adjusted to given target values, for example to equal values, by incorporating appropriate tuning sections (140) into the electrical lines. The lines may for example comprise different geometries and/or materials in the tuning sections.

Abstract: Techniques, systems, and devices relating to conducting calibration of LIDAR systems are disclosed. In one exemplary aspect, a light detection and ranging (LIDAR) device is disclosed. The device comprises a light beam emitter operable to emit a light beam; a prism set positioned in an optical path of the light beam to refract the light beam onto a surface of a surrounding object; a light detector to detect light reflected by the surface of the surrounding object; a controller configured to estimate the surface of the surrounding object based on the detected light. The controller is operable to (1) determine a relative bias in the prism set, and (2) cause, based on the relative bias in the prism set, a compensation for an estimation error in the controller's estimation of the surface of the surrounding object.

Abstract: A method for fault positioning and recovery of a voltage source converter includes following steps. Locking a converter station when it is detected that an alternating-current voltage contains a zero sequence voltage or a direct-current voltage contains an unbalanced voltage. Positioning a fault by continuing to detect the zero sequence voltage of an alternating-current side of the converter. Recovering operation of each station after the fault is positioned. The method for fault positioning and recovery is simple, practical, has high reliability, and can effectively detect the problems that each station contains a zero sequence voltage of an alternating-current side and cannot easily position a fault caused due to transmission of the zero sequence voltage of the alternating-current side to an opposite-side alternating-current system via a voltage source converter.

Abstract: Systems, methods, and/or devices are used for storing images. An electronic device includes an image sensor, a solid-state drive (SSD) that includes a Peripheral Component Interconnect Express (PCIe) compatible electrical interface, and a field-programmable gate array (FPGA) coupled to the image sensor and the SSD. The FPGA implements a PCIe intellectual property (IP) core. The FPGA is configured to: receive raw image data from the image sensor; process the raw image data to obtain processed image data; and transfer the processed image data to the SSD through the PCIe compatible electrical interface of the SSD, wherein the transfer through the PCIe compatible electrical interface is driven by the PCIe IP core of the FPGA.

Abstract: A functionally integrated detachable photovoltaic module junction box has a base part and an upper cover part. The base part has string ports and two power supply ports. The string port electrically connects to strings on a photovoltaic module. The upper cover part has a circuit board therein. The circuit board has an optimizing and monitoring circuit and multiple electrical connection pieces connected to the optimizing and monitoring circuit. The electrical connection pieces are detachably connected to the string ports and the power supply port on the base part, for the optimizing and monitoring circuit to perform such functions as component optimization, monitoring, communication and shutdown on the photovoltaic module. Use of the junction box reduces the production, assembly and maintenance costs. When the junction box requires maintenance, only the upper cover part is needed to be replaced, thereby quickly completing the repair.

Abstract: The disclosure provides an approach for transferring a packet from a source client to a destination application across a network. The approach generally includes writing an identifier to the packet by a switch, transferring the packet to a distributed log, logging a copy of the packet at the distributed log, and analyzing the packet for misplaced requests. The approach further includes, transmitting the packet from the distributed log to the destination, intercepting the packet by a shim layer and comparing the identifier to a counter maintained by the shim layer, and forwarding the packet to the destination application.

Abstract: A method of generating a depositional sequence volume from seismic data is performed at a computer system having one or more processors and memory storing programs to be executed by the one or more processors. The method includes the following steps: receiving a seismic dataset, wherein the seismic dataset includes image values at a plurality of grid points of a 3-D subsurface model; identifying reflections at a first subset of the plurality of grid points and geological constraints at a second subset of the plurality of grid points of the 3-D subsurface model from processing the image values of the seismic dataset; and generating a depositional sequence volume for the 3-D subsurface model from the reflections at the first subset of grid points and the geological constraints at the second subset of grid points.

Abstract: Provided is a method for controlling a zero sequence voltage of a voltage source converter. When an alternating current system ground fault occurs, a zero sequence voltage at an alternating current (AC) side or a zero sequence voltage at a direct current (DC) side of a converter is detected. If the detected zero sequence voltage is greater than a set value V0ref, a DC side voltage of the converter can be increased to a set value Udc0, thereby generating an appropriate reference wave at the AC side of the converter to match an AC voltage, and accordingly controlling overmodulation of a reference wave at a faulty station to suppress fluctuation of a DC voltage.

Abstract: A functionally integrated detachable photovoltaic module junction box has a base part and an upper cover part. The base part has string ports and two power supply ports. The string port electrically connects to strings on a photovoltaic module. The upper cover part has a circuit board therein. The circuit board has an optimizing and monitoring circuit and multiple electrical connection pieces connected to the optimizing and monitoring circuit. The electrical connection pieces are detachably connected to the string ports and the power supply port on the base part, for the optimizing and monitoring circuit to perform such functions as component optimization, monitoring, communication and shutdown on the photovoltaic module. Use of the junction box reduces the production, assembly and maintenance costs. When the junction box requires maintenance, only the upper cover part is needed to be replaced, thereby quickly completing the repair.

Abstract: A detachable split solar power optimization junction box module has split junction boxes (1A, 1B, 1C) each having a base part and an upper cover part. String ports (11) are provided in a base (10) of the base part for electrically connecting a string of a photovoltaic module (40). The upper cover part has an upper cover (20) with a circuit board (21) provided therein. The circuit board (21) has a power optimization module connected with electrical connection pieces (22). The electrical connection pieces (22) are detachably inserted into the string ports (11) so that the power optimization module performs power optimization on the string of the photovoltaic module. The split junction boxes (1A, 1B, 1C) are used for power optimization at the string level. The power optimization module is integrated in the upper cover part that detachably connects with the base part for convenience of installation and maintenance.

Abstract: Various embodiments are directed to techniques for determining a current location of a mobile device. An apparatus includes a SLAM candidate component to identify a first candidate key frame matching a current captured frame by a first degree from an interval-based key frame set with key frames selected on a recurring interval from multiple earlier captured frames captured by mobile device camera of surroundings within a defined area, a CNN candidate component to identify a second candidate key frame matching the current captured frame by a second degree from a difference-based key frame set with key frames selected from the multiple earlier captured frames based on a degree of difference from all key frames already therein, and a position estimation component to determine a current location of the mobile device from estimates of differences between the current location and locations of the first and second candidate key frames.