Abstract: The present invention is related to novel 20-sulfonylamidine derivatives of camptothecin (1), method of synthesizing the same, and use thereof as an antitumor agent, for examples an antitumor agent for treating nasopharyngeal, lung, breast or prostate cancer.

Abstract: The present invention has disclosed a wind power bundling control method after wind power and thermal power are connected to a power grid in the field of electric power system security technology, including regulating wind power output and thermal power output forward or backward; calculating the transient stability margin of the grid, load level index of element and voltage out-of-limit index of busbar after regulating wind power output and thermal power output respectively; calculating wind power/thermal power paying value according to the transient stability margin of the grid, load level index of element and voltage out-of-limit index of busbar after regulating wind power output and thermal power output; if wind power/thermal power paying value is larger than set threshold value, regulating wind power output and thermal power output backward/forward; if wind power/thermal power paying value is smaller than set threshold value, regulating wind power output and thermal power output forward/backward.

Abstract: Disclosed are a temperature compensation circuit for a display panel, a temperature compensation method and a liquid crystal display. The temperature compensation circuit comprises: a temperature detection unit configured to detect a variation in the temperature; a temperature conversion unit configured to convert the detected variation in the temperature into a voltage compensation value; and a compensation signal generation unit configured to process the voltage compensation value to generate a compensation signal. According to the embodiments of the present disclosure, the common electrode voltage of the display panel can be adjusted in real-time when the temperature varies, so that an amount of flickers presented on the display panel with an polarity inversion can be maintained at minimum, and thus a displaying of picture can be more stable and a visual experience of a viewer can be enhanced.

Abstract: A tool configured for adjusting a plurality of pressing heads of an auxiliary welding machine and a method for operating the same are disclosed. The tool includes: a support; a limiting mechanism disposed on the support, wherein the limiting mechanism has a limiting groove for receiving a top end of at least one of the plurality of pressing head. It is possible to adjust the plurality of pressing heads of the auxiliary welding machine more conveniently and accurately using the above tool.

Abstract: Techniques and systems are disclosed for improving the computation and solution of bilevel MIP problems. Various single-level reformulation techniques can be used to transform a bilevel MIP problem into soluble form. Decomposition techniques can be applied to the single-level reformulations to iteratively converge on an optimal or near-optimal solution. Some techniques described herein are operative within software applications for solving mathematical problems or MIP problems, and some are operable within an application programming interface or MIP solution service that other software components can access. In some cases, the techniques may be operative within domain-specific modeling software that solves, models, plans, or suggests actions in particular scenarios, for example power grid interdiction analysis and defense tools.

Abstract: A recovery circuit for a basic input-output system (BIOS) of a computer includes a storage, a platform controller hub (PCH), and a processor. An effective chip select signal is received by a chip selection pin of the storage via a second pin of the processor when a first pin of the processor does not receive any signals, data in the processor is transmitted to the PCH to make the computer boot up, the data in the processor is transmitted to the storage to erase and update data in the storage.

Abstract: The present invention discloses a preamble sequence generating method and device, which are used to avoid a problem, caused by damages to a preamble sequence resulting from interference in an NB-PLC system, that it is difficult for a receive end to correctly perform timing synchronization. The method includes: determining a quantity m of orthogonal frequency division multiplexing OFDM symbols that constitute a single pattern in a preamble sequence, where m is not less than 2; and generating a preamble sequence according to m, so that every m OFDM symbols that are in the generated preamble sequence and consecutive in a time domain constitute a single pattern, and the generated preamble sequence includes at least two patterns, where the patterns are different from each other. Embodiments of the present invention further provide a timing synchronization method and device.

Abstract: The present invention is related to novel 20-sulfonylamidine derivatives of camptothecin (1), method of synthesizing the same, and use thereof as an antitumor agent, for examples an antitumor agent for treating nasopharyngeal, lung, breast or prostate cancer.

Abstract: A method of calculating voltage and power of large-scaled photovoltaic power plant includes following steps. Environment models of varies locations within the photovoltaic power plant are obtained. A photovoltaic display model is established by establishing a photovoltaic cell model, combining the photovoltaic cell model with the environment models, determining a combination of the environmental data on photovoltaic panels and the photovoltaic cell model, and determining a quantitative relationship between a photovoltaic cell power generation state and photovoltaic environment. An inverter model is obtained by modeling inverters connected to photovoltaic cells. A grid-side model is obtained. An electrical energy and voltage forecast model is constructed by integrated the photovoltaic display model, the inverter model, and the grid-side model.

Abstract: A method of simulating wind field of extreme arid region based on WRF includes following steps. A mode parameter optimization scheme for wind energy simulation is selected, wherein the mode parameter optimization scheme is selected by selecting a group of mode parameter optimization schemes of different ground floors, land process, and planet boundary layers having great influence on simulation of the boundary layer of wind field, and comparing the mode parameter optimization schemes. A wind energy simulation of the extreme arid region is performed during a preset length of time using the selected mode parameter optimization scheme. Simulation configuration of the wind field for the extreme arid region is obtained through results of the wind energy simulation.

Abstract: The present invention discloses a short-term operation optimization method for a power system including large-scale wind power, comprising modeling the randomness of wind power output, modeling the randomness of the load of electric power system and modeling net load of electric power system. Net load refers that for probability distribution of net load that is too discretized, probability distribution curve of net load is divided into N intervals, the probabilities for each interval are obtained and probability distribution curve of net load is obtained through calculating and weighing each interval.

Abstract: A method of constructing wind power connection system model based on measured data includes following steps. Operating data is selected in a preset time of each wind turbine in a wind farm. A wind speed matrix and a active power matrix of sampling points are constructed based the operating data. A wind speed model of the wind farm is obtained based on the wind speed matrix and the active power matrix.

Abstract: The present invention discloses a testing method for dynamic model parameters of a wind power plant, wherein under testing conditions including stable running of wind turbine generators and reactive-load compensation equipment, stable wind speed between a cut-in wind speed and a rated wind speed, and the wind power plant output smaller than a rated output, finishes a wind speed transient disturbance test, a wind power plant unit tripping and inputting disturbance test, a wind power plant power change test, a disturbance test for reactive-load compensation equipment of the wind power plant, a tripping disturbance test for hydroelectric power plant and thermal power plant near the wind power plant and a manual single-phase ground short circuit test at the outgoing line part of the wind power plant, and records running curves of the wind power plant under each condition to finish the parameter test.

Abstract: A method of assessing risk of power system with high penetration of wind power includes following steps. A correlation coefficient between wind power and load is obtained, and a probability of negative peak shaving is calculated. A probability of extreme ramp rate under extreme weather conditions is obtained, wherein a probability distribution of the extreme ramp rate matches principles of HILF and LIHF. A PRNS, an ERNS, and a RI are obtained, optimal reserve demand is obtained utilizing Unit Commitment Model, and operation risk based on PRNS, ERNS, and RI is calculated. A relationship between frequency and consequence distribution of risk is obtained by calculating the operation risks during N days, dividing the operation risks into different risk levels, and calculating a frequency of each risk level, wherein the operation risks in each level have similar values.

Abstract: Disclosed are a temperature compensation circuit for a display panel, a temperature compensation method and a liquid crystal display. The temperature compensation circuit comprises: a temperature detection unit configured to detect a variation in the temperature; a temperature conversion unit configured to convert the detected variation in the temperature into a voltage compensation value; and a compensation signal generation unit configured to process the voltage compensation value to generate a compensation signal. According to the embodiments of the present disclosure, the common electrode voltage of the display panel can be adjusted in real-time when the temperature varies, so that an amount of flickers presented on the display panel with an polarity inversion can be maintained at minimum, and thus a displaying of picture can be more stable and a visual experience of a viewer can be enhanced.

Abstract: An alarm tone adjustment circuit includes a sound collection unit with a function of collecting sound of a surrounding environment, an analog-digital (A/D) convertor, and a processing unit. The A/D convertor transforms the sound of a surrounding environment from the sound collection unit to a digital signal. The processing unit is coupled to the A/D convertor and an alarm tone unit, and determines a decibel range of the sound of surrounding environment according to a duty cycle of the digital signal, and adjusts a volume of a ring output from the alarm tone unit according to the decibel range of the sound of surrounding environment. Therefore, the alarm tone of the electronic device can be changed effectively according to the sound of surrounding environment.

Abstract: A method of calculating available output power of wind farm includes following steps. A space vector Vk is obtained by decomposing a power sequence of benchmarking wind turbines in a wind farm based on empirical orthogonal function. A typical power sequence of the benchmarking wind turbines is calculated by restoring the space vector Vk. A total power Ptotal of a feeder on which the benchmarking wind turbines is operated is obtained by enlarging a typical power of each benchmarking wind turbine in proportion according to the quantity of the benchmarking wind turbines operated on the feeder. An output power Pestimate of the wind farm is obtained by accumulating the total power Ptotal of all the benchmarking wind turbines.

Abstract: Disclosed is a method for modeling a medium and long term wind power output model optimally operating in a medium and long term in a power system.

Abstract: In embodiments of device proximity detection implemented in hardware, a computing device, such as a mobile phone, appliance device, or other electronic device can be implemented with wireless radio systems for wireless communications, and a wireless radio system receives a wireless signal. A computing device includes a radio controller of the wireless radio system, and the radio controller is implemented to detect an indication associated with the wireless signal, such as a byte pattern in the wireless signal and/or a signal strength of the signal. The radio controller can then determine that the indication of the wireless signal identifies the wireless signal as pertinent to an application executing on the computing device, and communicate an event notice to a signal manager that the wireless signal has been identified. The radio controller communicates event notices via a hardware interface that is implemented to interface the radio controller with the signal manager.

Abstract: A method for managing a plurality of files in a communication network having a plurality of clients includes a server receiving (502) metadata associated with a secured file stored in a virtual data drive of a first client. The server also receives (504) data segments associated with the file from the virtual data drive of the first client. The server stores the metadata and data segments associated with the file at the server. The server generates (506) a first representation of the file based on the received metadata and data segments associated with the file and sends (508) the first representation of the file to the plurality of clients. Next, the server receives (510) a request from a second client for at least one data segment of the file. The server authenticates the request based on a plurality of access rights of a user of the second client and sends (512) the at least one data segment of the file to the second client when the request is authenticated.