Boe Technology Group Co., Ltd.

Hefei Boe Optoelectronics Technology Co., Ltd.

Beijing Jiaotong University

Chongqing Boe Optoelectronics Technology Co., Ltd.

Petrochina Company Limited

Hangzhou H3c Technologies Co., Ltd

Beijing Kohler Ltd.

Beijing Mechanical Equipment Institute

Xiaojun Wang

Shouzheng Wu

Meng Li

Jun Xu

Qing Zhang

Fang Zhang

Dapeng Liu

Baoqing Yin

Zhigang Ouyang

Ji Shao

Guomin Luo

Dahai Zhang

Yin Xu

Xiangyu Wu

Pinghao Ni

Jinghan He

Fusheng Huang

Yiping Luo

Wei Wang

Lei Zhang

Ying Wang

Wei Chen

Jun Feng Liu

Heng Zhang

Tongmin Liu

Yan Rong Shen

Ni Zhang

Shengjie Wang

Junhui Zhang

Jiahui Li

Xinxin Wu

Xu Shi

Xuchang Ding

Dongqing Li

Zhilong Xu

Dongming Zhi

Lichun Kuang

Zhongchun Sun

Zhijun Qin

Qiusheng Chang

Haozhi Niu

Qiufang Zhang

Zhaoyang Cheng

Shutong Huang

Yongfeng Tang

Nuo Xu

Lianjun Wang

Hongliang Yan

Keao Chen

Yan Shen

Xinjun Mao

Min Ouyang

The present disclosure relates to a method for protecting DC line impedance phase based on protection and control coordination, and an application scenario of the method for protecting is a three-terminal flexible DC transmission network. The method uses high controllability of a converter after a fault, injects a characteristic signal at a characteristic frequency, and calculates a phase angle of input impedance to determine a fault interval, which effectively improves protection performance, turns passive to active, and is not affected by nonlinearity of the converter. At the same time, compared with a full-bridge MMC, using a half-bridge MMC does not need to perform fault ride-through first when identifying a fault, and does not need to add additional equipment, it creates fault features and can reliably identify an fault interval; improves protection quickness and at the same time also has better economic benefits. It has selectivity, and an entire system may not be shut down due to failure of a single line.

Method for protecting DC line impedance phase based on protection and control coordination

A method for calculating the steady-state fault current of a modular multilevel converter (MMC) comprises calculating the dc-side critical resistance values R, Rand Rof the MMC based on the bridge arm inductance coefficient k and the ac-side reactance Xof the MMC; Then, determining the operating modes of the MMC based on R, Rand R, and calculating the steady-state dc fault current and the conduction overlap angle respectively under various operating modes without considering the ac-side resistance based on the parameters k, U, Rand the dc-side critical resistance values R, Rand R; After that the steady-state AC fault current amplitude and phase angle for each operating mode without considering the AC side resistance are calculated based on the DC current and conduction overlap angle for each operating mode, respectively. Finally, the steady-state AC fault current amplitude and phase angle are calculated for various operating modes considering the AC side resistance.

Steady state fault current calculation method for modular multilevel converter

It discloses a ring-connected bridge-type multi-port hybrid DC circuit breaker. When the number of ports is n, n is an integer greater than or equal to 2, the ring-connected bridge-type multi-port hybrid DC circuit breaker includes: an upper DC bus bar, a lower DC bus bar, n thyristor arms, n diode arms, a main breaker branch, and n bypass branches; each thyristor arm connects in series with a diode arm, forming a series circuit; a bypass branch is connected between every two adjacent series circuits, a port is provided at the connection point of the thyristor arm and the diode arm in each series circuit, and the port is used to connect the protected components or the DC lines.

Ring-connected bridge-type multi-port hybrid DC circuit breaker

A method that includes heating a bar having an outer diameter and a length to a first temperature for a first time; extruding the heated bar to form a hollow blank having a wall thickness; forming a semi-finished blank by closing one end; bending the semi-finished blank to have an angle between first and second parts of the semi-finished blank; placing the bent semi-finished blank in a die, which is heated to a second temperature; forming a shell by injecting a gas onto or into the bent semi-finished blank after closing the die through a gas inlet in the die at a pressure for a second time, which causes the bent semi-finished blank to fit a cavity of the bathroom hardware shell shaping die; removing the shell from the die and forming a water faucet hole therein; and plating an outer surface of the shell with a coating.

Production method of bathroom hardware shells

The present disclosure provides a dimmer and a manufacturing method thereof, a backlight unit and a display device. The dimmer includes at least one brightness adjusting unit. Each brightness adjusting unit includes a reflective layer and an electrochromic layer stacked over each other, and the electrochromic layer is configured to be reversibly switchable between a transparent state and a color rendering state.

Dimmer, manufacturing method thereof, backlight unit and display device

A shale oil analysis method and apparatus for continuously characterizing saturation of adsorbed oil and free oil, comprising: obtain NMR T2 spectrum, NMR porosity, oil saturation and wettability indexes of a core samples, determine a lower limit value for the saturation calculation of the absorbed oil based on the NMR T2 spectrum, the NMR porosity, the oil saturation and wettability indices; determining a lower limit value for the saturation calculation of the free oil according to the bulk relaxation Tspectrum of the crude oil of the well interval or an adjacent well interval and the NMR Tspectrum of the core samples; calculating the saturation of the absorbed oil and the free oil, and analyzing the shale oil in the well interval to be analyzed. The solution realizes the quantitative and continuous characterization of the adsorbed oil and the free oil of the shale oil via well logs.

Shale oil analysis method and apparatus for continuously characterizing saturation of adsorbed oil and free oil

A package structure of an organic light emitting diode display panel includes a display substrate, a glass cover plate and a package portion. The display substrate and the glass cover are arranged opposite to each other. The package portion is provided between a non-display region of the display substrate and a portion of the glass cover plate corresponding to the non-display region. The display substrate includes organic light emitting diode elements. The organic light emitting diode elements are located in a sealed cavity enclosed by the display substrate, the glass cover plate and the package portion. The package portion includes a first concavo-convex structure provided at a surface of the display substrate facing the glass cover plate; a second concavo-convex structure provided at a surface of the glass cover plate close to the display substrate; and a package material is provided between the first concavo-convex structure and the second concavo-convex structure.

Encapsulating structure of organic light emitting diode display panel having concave-convex structure in encapsulating portion

A touch module and a manufacturing method thereof, and a touch screen are provided. The method of manufacturing a touch module includes: forming a composite electrode, a lead, and a lead pad each of which has a stacked structure of a transparent conductive layer and a metal layer on a substrate by one patterning process, the touch module including a touch area, and a peripheral area and a bonding area located at the periphery of the touch area, the composite electrode being formed in the touch area, the lead being formed in the peripheral area, and the lead pad being formed in the bonding area; forming a protective layer outside the touch area, and etching away the metal layer of the composite electrode to form a transparent touch electrode.

Method of manufacturing a touch module

The present disclosure provides a display panel, a display device and a manufacturing method thereof to improve an effective display region of the display panel. The display panel comprises a plurality of pixels arranged in an array, and a black matrix between every two adjacent pixels, the display panel also comprises at least one display member displaying a preset color, and each of the at least one display member is arranged on one side of the black matrix between two corresponding adjacent pixels close to a light-outgoing surface of the display panel.

Display panel, display device and manufacturing method thereof

Embodiments of the present application provide an apparatus for carrying a substrate by an off-line vacuum suction and a method for transporting a substrate. The apparatus includes a carrying frame provided with a clamper, a vacuum suction device and a detaching device arranged on the carrying frame, wherein the vacuum suction device is arranged to suck and fix a substrate and is connectable to and detachable from a vacuum pipeline and the detaching device is arranged to detach the vacuum suction device and the vacuum pipeline from each other while keeping the vacuum suction device to continuously suck the substrate to be transported. The apparatus and the method can improve fixing of the substrate and achieve off-line suction to the substrate.

Apparatus for carrying substrate by off-line vacuum suction and method for transporting substrate

According to an example, a guide bracket and an electronic device adopting the guide bracket are provided. A free end of a resilient sheet installed in a wall of the guide bracket is to be held by a snap-fit part set in a chassis beyond the external surface of the wall where the resilient sheet is located to implement position limiting of the guide bracket in the forward-backward direction. The free end of the resilient sheet is to retreat inwards with the bending of the resilient sheet towards the interior of the wall where the resilient sheet is located to avoid the snap-fit part.

Guide bracket and electronic device adopting the guide bracket

Systems and methods based on firing table fitting allow interception of a small low-altitude low-velocity target. A system includes: a target detecting system, a directing control system, a launch control system, an interception execution system, a communication bus a, a communication bus b and a communication bus c. Firing table data under a standard working condition and fitting parameters under different working conditions are pre-stored in the system. Based on target flight data and environment condition parameters, a lead aiming point is predicted, a time sequence of each stage of a fight flow is controlled, and firing data are output to execute an interception by the launch control system. An interception operation is simplified, a ground control of a non-controlled bomb fight flow is realized, a single shot success probability of an interception system is increased, and an interception cost is reduced.

Low-altitude low-speed small target intercepting method based on firing table fitting

Growing community of inventors

Beijing, China

Xiaojun Wang