公开(公告)号：US20170294011A1

公开(公告)日：2017-10-12

申请号：US15361933

申请日：2016-11-28

Applicant: University of Electronic Science And Technology of China

Inventor： Yunping CHEN ,  Yaju XIONG ,  Ling TONG ,  Weihong HAN

IPC: G06T7/00 ,  G06K9/46 ,  H04N5/33 ,  G06K9/62 ,  H04N17/00 ,  G06T7/11

CPC classification number: G06T7/0002 ,  G06K9/0063 ,  G06K9/34 ,  G06K9/4642 ,  G06K9/4661 ,  G06K9/52 ,  G06K9/6212 ,  G06K9/6267 ,  G06T7/11 ,  G06T7/143 ,  G06T2207/10036 ,  G06T2207/30181 ,  G06T2207/30204 ,  H04N5/33 ,  H04N17/002

Abstract: The present invention discloses a method for retrieving atmospheric aerosol based on statistical segmentation. Firstly a multi-band remote sensing image including an apparent reflectance and an aerosol optical thickness look-up table corresponding to a retrieval band is obtained, then pixels are partitioned and screened according to apparent reflectance segments of a mid-infrared 2.1 micrometer band. After that the retained pixel sets are further partitioned and screened according to the apparent reflectance segments of the mid-infrared 1.6 micrometer band. Finally the obtained pixel sets are partitioned into two categories according to the pixel number, one category including pixels having more pixels, the other including those with less pixels.The category with more pixels is taken as the reference part for retrieval. Specifically, the pixel sets are first searched for the clean segment, then the ground surface reflectivity of the clean segment is taken as the ground surface reflectivity of the whole pixel set, thereby obtaining the aerosol thickness value through retrieval. After that these pixels are taken as references to perform retrieval on the other category.The present invention can improve accuracy and resolution of the retrieval result of the bright ground surface area, and is applied to a wider range.

公开(公告)号：US20170149823A1

公开(公告)日：2017-05-25

申请号：US15306094

申请日：2015-06-26

Applicant: University of Electronic Science and Technology of China

Inventor： Hong WEN ,  Jie TANG ,  Da XIANG ,  Huanhuan SONG

IPC: H04L29/06 ,  H04B7/0456 ,  H04B7/06

CPC classification number: H04L63/1475 ,  H04B7/0456 ,  H04B7/0617 ,  H04L1/06 ,  H04L9/0875 ,  H04L63/0428 ,  H04W12/12

Abstract: The present invention discloses an unconditional secure communication method based on beam-forming and security code, which comprises the following steps of: Legitimate users send to the signal pie-encoded and modulated, meanwhile eavesdropper receives signals and calculates the bit error rate; computing security coding parameters, legitimate received users send pilot sequence, and legitimate sending users estimate legitimate channel, and extract information on legal channel coding and modulating signal was SVD pre-coding and sending; the signal was decoded, that will be judgment and demodulation then the signal after decoding do security code is transmitted to message or tapping, due to lack of legal channel information, eavesdropper cannot lift pre-coding processing of the received signal with the high bit error rate. This method can establish advantages channel of the wiretap model channel and to ensure that legitimate users can receive signals at the lower bit error rate.

公开(公告)号：US09523717B2

公开(公告)日：2016-12-20

申请号：US14057544

申请日：2013-10-18

Applicant: University of Electronic Science and Technology of China

Inventor： Hao Zeng ,  Peng Ye ,  Kuojun Yang ,  Guang Yang ,  Qinchuan Zhang

IPC: G01R29/00 ,  G01R13/02

CPC classification number: G01R13/0272 ,  G01R13/0254

Abstract: The present invention provides a method for measuring the waveform capture rate of parallel digital storage oscilloscope. On the basis of double pulse measurement, and in consideration of the asymmetry of acquisition and the refreshing time of parallel DSO, the present invention provides a step amplitude-frequency combined pulse measurement to measure the time for waveform acquisition and mapping Tmap, the number of captured waveforms before LCD refreshing Wacq and the dead time caused by LCD refreshing TDDT, and then calculates the measured average WCR of parallel DSO, according to the measured data, so that the WCR of parallel can be measured.

Abstract translation: 本发明提供了一种用于测量并行数字存储示波器的波形捕获率的方法。 在双脉冲测量的基础上，考虑到并行DSO的采集不对称性和刷新时间，本发明提供了一种步进幅度 - 频率组合脉冲测量，以测量波形采集和映射时间Tmap，数量 在LCD刷新Wacq之前捕获的波形和由LCD刷新TDDT引起的死区时间，然后根据测量数据计算并行DSO的测量平均WCR，从而可以测量并行的WCR。

公开(公告)号：US09419631B2

公开(公告)日：2016-08-16

申请号：US14651340

申请日：2013-12-10

Applicant: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Jian Fang ,  Yaoyao Jia ,  Tongwei Yuan ,  Hua Pan

IPC: H03L7/06 ,  H03L7/085 ,  H03L7/089

CPC classification number: H03L7/085 ,  H03L7/0891

Abstract: A charge pump circuit used for a charge pump phase-locked loop that includes a charging and discharging unit, two complementary circuit units, two operational amplifier units, an inverter unit, and a current mirror unit. The charge pump circuit resolves the matching problem of charging and discharging currents and the charge sharing problem in existing charge pump circuits. Both complementary circuit units positively and reversely compensate the charging and discharging unit to keep the charging and discharging currents of capacitors constant. Thus, the problem of the change of charging and discharging currents is resolved, the voltage linear variation of the charge pump capacitors is achieved, and the charging and discharging of the capacitors can be accurately controlled. The charge pump circuit is simple in structure, easy to integrate, high in the matching precision of the charging and discharging current sources, and suitable for low voltage and low power consumption applications.

Abstract translation: 用于电荷泵锁相环的电荷泵电路，包括充放电单元，两个互补电路单元，两个运算放大器单元，逆变器单元和电流镜单元。 电荷泵电路解决了现有电荷泵电路中充放电电流的匹配问题和电荷共享问题。 两个互补电路单元正向和反向地补偿充电和放电单元，以保持电容器的充电和放电电流恒定。 因此，解决了充放电电流变化的问题，可以实现电荷泵电容器的电压线性变化，能够精确地控制电容器的充放电。 电荷泵电路结构简单，易于集成，充放电电流源的匹配精度高，适用于低电压和低功耗应用。

公开(公告)号：US20160233962A1

公开(公告)日：2016-08-11

申请号：US14892578

申请日：2014-05-20

Applicant: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Yaxin ZHANG ,  Shen QIAO ,  Shixiong LIANG ,  Ziqiang YANG ,  Zhihong FENG

IPC: H04B10/516 ,  H04B10/50

CPC classification number: H04B10/516 ,  H04B10/501 ,  H04B10/90

Abstract: Terahertz external modulator based on high election mobility transistors belongs to the field of electromagnetic functional devices technology. This invention includes the semiconductor substrate (1), the epitaxial layer (2), and the modulation-unit array (4). The epitaxial layer (2) is set on the semiconductor substrate (1). The modulation-unit (4), the positive electrode (3), and the negative electrode (5) are all set on the epitaxial layer (2). The modulation-unit array includes at least three units with each of them is composed of high electron mobility transistors and metamaterial-structure. The gates of transistors connect to the negative electrode (5), and the sources and drains connect to the positive electrode (3). This invention is used for manipulation of spatial transmission terahertz waves. It could be operated at room temperatures, normal pressures, and non-vacuum condition. It does not need to load on the waveguide, thus is easy to package and use.

Abstract translation: 基于高选举迁移率晶体管的太赫兹外部调制器属于电磁功能器件技术领域。 本发明包括半导体衬底（1），外延层（2）和调制单元阵列（4）。 外延层（2）设置在半导体衬底（1）上。 调制单元（4），正极（3）和负极（5）全部设置在外延层（2）上。 调制单元阵列包括至少三个单元，每个单元由高电子迁移率晶体管和超材料结构组成。 晶体管的栅极连接到负极（5），源极和漏极连接到正极（3）。 本发明用于空间传输太赫兹波的操纵。 它可以在室温，正常压力和非真空条件下运行。 它不需要加载在波导上，因此易于封装和使用。

公开(公告)号：US20160126051A1

公开(公告)日：2016-05-05

申请号：US14880172

申请日：2015-10-09

Applicant: University of Electronic Science and Technology of China

Inventor： Zhaoyun Duan ,  Xianfeng Tang ,  Xinwu Ma ,  Xiang Huang ,  Zhanliang Wang ,  Tao Tang ,  Yanshuai Wang ,  Yubin Gong

IPC: H01J23/16

CPC classification number: H01J23/16 ,  H01J25/34

Abstract: A metamaterial high-power microwave source relates to the fields of vacuum electronic technology, particle physics, and accelerators, including: a cathode, a metamaterial slow-wave structure (SWS), a waveguide and coaxial line coupler located at one end of the metamaterial SWS and a collector component located at the other end of the metamaterial SWS. The metamaterial SWS provided by the present invention is greatly smaller than a rectangular waveguide having the same frequency, so as to realize a miniaturization of devices and facilitate integration with semiconductor devices. The waveguide and coaxial line coupler has a good transmission characteristic and a low reflection in a relatively wide frequency band, which guarantees a high-efficient coupling output of a signal. Moreover, the metamaterial high-power microwave source has a high-power output and a pulsed output power reaching a megawatt level.

Abstract translation: 超材料高功率微波源涉及真空电子技术，粒子物理和加速器领域，包括：阴极，超材料慢波结构（SWS），位于超材料一端的波导和同轴线耦合器 SWS和位于超材料SWS另一端的收集器组件。 本发明提供的超材料SWS比具有相同频率的矩形波导要小得多，从而实现了器件的小型化并且便于与半导体器件集成。 波导和同轴线耦合器在相对宽的频带中具有良好的传输特性和低反射率，这保证了信号的高效耦合输出。 此外，超材料高功率微波源具有高功率输出和达到兆瓦级的脉冲输出功率。

公开(公告)号：US20160054265A1

公开(公告)日：2016-02-25

申请号：US14932973

申请日：2015-11-05

Applicant: University of Electronic Science and Technology of China

Inventor： Qishui Zhong ,  Hui Li ,  dajin Chen ,  Baihua Li

IPC: G01N27/62 ,  H03K7/08 ,  H03K17/691

CPC classification number: G01N27/624 ,  H03K7/08 ,  H03K17/102 ,  H03K17/691

Abstract: An environment detecting apparatus employing an asymmetric waveform pulse generator is disclosed. The asymmetric waveform pulse generator comprises a metal oxide semiconductor field effect transistor (MOSFET) bridge circuit that comprises a plurality of MOSFETs for inverting high voltage DC voltage to asymmetric waveform pulses, a pulse-width modulating (PWM) circuit for generating PWM signals, and a plurality of isolation driving circuits corresponding to the plurality of MOSFETs, for controlling switching on/off of the plurality of MOSFETs in the MOSFET bridge circuit based on the PWM signals generated by the PWM circuit. Wherein each of the isolation driving circuits comprises an isolation transformer for isolating the MOSFET bridge circuit from the PWM circuit.

Abstract translation: 公开了一种采用非对称波形脉冲发生器的环境检测装置。 非对称波形脉冲发生器包括金属氧化物半导体场效应晶体管（MOSFET）桥接电路，其包括用于将高压DC电压转换为非对称波形脉冲的多个MOSFET，用于产生PWM信号的脉宽调制（PWM）电路，以及 对应于多个MOSFET的多个隔离驱动电路，用于基于由PWM电路产生的PWM信号来控制MOSFET桥式电路中的多个MOSFET的导通/截止。 其中每个隔离驱动电路包括用于将MOSFET桥接电路与PWM电路隔离的隔离变压器。

公开(公告)号：US20150333170A1

公开(公告)日：2015-11-19

申请号：US14650176

申请日：2013-12-19

Applicant: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Junhong Li ,  Ping Li

IPC: H01L29/78 ,  H01L29/66

CPC classification number: H01L29/7802 ,  H01L29/0634 ,  H01L29/0653 ,  H01L29/405 ,  H01L29/407 ,  H01L29/408 ,  H01L29/66712 ,  H01L29/7812 ,  H01L29/7816

Abstract: Provided is a lateral power device having low specific ON-resistance and using a high-dielectric constant socket structure and a manufacturing method therefor, which relate to semiconductor power devices. A source electrode (8) of the device is of a first conduction type, and a channel region (6), a silicon substrate (4) and an ohmic contact heavily-doped region are of a second conduction type; at least two isolation regions are arranged in an embedded manner in a drift region (1); between the isolation regions are the drift region (1) and the channel region (6); each isolation region extends from the source electrode (8) to a drain electrode (11); high-dielectric constant material strips (3) and first insulation dielectric layers (10) form boundaries of the bottoms and sidewalls of the isolation regions; the isolation regions are filled with a first filling material (2), a second insulation dielectric layer (9) is arranged on the upper surface of the drift region (1) and the upper surfaces of the isolation regions, and a gate electrode (5) directly contacts the first filling material (2) via holes on the second insulation dielectric layer (9); and a source electrode lead-out wire (16) and a drain electrode lead-out wire (12) directly contact the source electrode (8) and the drain electrode (11) respectively via the holes on the second insulation dielectric layer (9). The area of a power device can be greatly reduced on the premise of not reducing the withstand voltage and not increasing the specific ON-resistance.

Abstract translation: 本发明提供一种具有低比导通电阻和使用涉及半导体功率器件的高介电常数插座结构及其制造方法的侧向功率器件。 器件的源极（8）是第一导电类型，沟道区（6），硅衬底（4）和欧姆接触重掺杂区是第二导电类型; 至少两个隔离区域以嵌入的方式布置在漂移区域（1）中; 在隔离区之间是漂移区（1）和沟道区（6）; 每个隔离区域从源电极（8）延伸到漏电极（11）; 高介电常数材料条（3）和第一绝缘电介质层（10）形成隔离区的底部和侧壁的边界; 隔离区域填充有第一填充材料（2），在漂移区域（1）的上表面和隔离区域的上表面上设置第二绝缘电介质层（9）和栅电极（5） ）通过第二绝缘介电层（9）上的孔直接接触第一填充材料（2）; 并且源电极引出线（16）和漏电极引出线（12）分别经由第二绝缘介电层（9）上的孔直接接触源电极（8）和漏电极（11） 。 在不降低耐压且不增加特定导通电阻的前提下，功率器件的面积可以大大降低。

公开(公告)号：US09130583B2

公开(公告)日：2015-09-08

申请号：US14584599

申请日：2014-12-29

Applicant: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Wuhuang Huang ,  Kuojun Yang ,  Houjun Wang ,  Jun Jiang ,  Hao Zeng ,  Duyu Qiu ,  Peng Ye ,  Qinchuan Zhang ,  Shulin Tian

IPC: H03M1/00 ,  H03M1/12 ,  G06T17/20 ,  G06F3/038 ,  G06F3/044

CPC classification number: H03M1/128 ,  G06F3/038 ,  G06F3/044 ,  G06T17/20 ,  H03M1/00 ,  H03M1/12 ,  H03M1/1285

Abstract: For the signal under acquisition which varies monotonically before and after the trigger time, a method for full-digital random sampling employs first sampled data before the trigger time and first sampled data after the trigger time to fit a curve, and obtains an intersection point of triggering level and the fitted curve, then, calculates the time interval between sampled data after the trigger time and the intersection point in the end, reconstructs the original signal, i.e. the signal under acquisition by a time interval of each acquisition. Thus, an analog trigger circuit and a time measurement circuit of conventional random sampling system can be eliminated, that simplifies the circuit design of data acquisition system and decreases its hardware complexity. Moreover, the higher sampling rate for the signal under acquisition is attained, and more waveform details are obtained.

Abstract translation: 对于在触发时间之前和之后单调变化的信号，全数字随机采样的方法在触发时间之前采用第一采样数据，并在触发时间之后采用第一采样数据以拟合曲线，并获得 触发电平和拟合曲线，然后计算触发时间之后的采样数据与最终交点之间的时间间隔，重建原始信号，即每次采集时间间隔内的采集信号。 因此，可以消除常规随机采样系统的模拟触发电路和时间测量电路，简化了数据采集系统的电路设计，降低了硬件复杂度。 此外，获得获取信号的较高采样率，并获得更多的波形细节。

公开(公告)号：US20150206025A1

公开(公告)日：2015-07-23

申请号：US14598512

申请日：2015-01-16

Applicant: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Yunping CHEN ,  Ling TONG ,  Yan CHEN ,  Bo GAO ,  Yu TIAN ,  Yuxia LI ,  Weihong HAN ,  Yang LI

IPC: G06K9/46 ,  G06T5/00

CPC classification number: G06T5/00 ,  G06K9/4647 ,  G06T7/13 ,  G06T7/73 ,  G06T2207/20192

Abstract: A method for identifying and extracting a linear object from an image is disclosed. The method comprises: acquiring an original image to be processed, wherein the original image is taken by a camera, received through network transmission or copied from a compact disc or a removable disk; preprocessing the original image to obtain an enhanced image; extracting an edge information image from the enhanced image; then extracting linear features by performing, on the edge information image, a linear feature extracting transform improved with a cluster operator; finally; identifying and extracting the linear object by distinguishing the linear object from other linear features by considering characteristics of the linear object to be identified and extracted. According to the invention, a linear feature extracting transform improved with a cluster operator is constructed from a distribution of edge pixels in the edge information image along a 2-dimensional direction, which makes it possible to extract, rapidly and accurately, weak linear objects such as power lines from images having complicated background and sub-pixels.

Abstract translation: 公开了一种从图像中识别和提取线性对象的方法。 该方法包括：获取要处理的原始图像，其中原始图像由相机拍摄，通过网络传输接收或从光盘或可移动盘复制; 预处理原始图像以获得增强图像; 从增强图像提取边缘信息图像; 然后通过在边缘信息图像上执行利用集群算子改进的线性特征提取变换来提取线性特征; 最后; 通过考虑待识别和提取的线性对象的特征，通过区分线性对象与其他线性特征来识别和提取线性对象。 根据本发明，通过沿着二维方向的边缘信息图像中的边缘像素的分布来构建利用集群算子改进的线性特征提取变换，这使得可以快速和准确地提取弱线性对象 作为具有复杂背景和子像素的图像的电力线。