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利用熄弧后暂态信息测量谐振接地系统的对地电容

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电工技术学报 2020年第7期35卷 1521-1528页

作者：薛永端李广徐丙垠中国石油大学(华东)新能源学院青岛266580 山东理工大学电子与电气工程学院淄博255000

系统对地电容的准确测量涉及消弧线圈容量配置、补偿度调整、故障点残流控制等一系列问题。该文利用谐振接地系统单相接地故障等效电路,分析了故障点熄弧后的电气特征,发现熄弧后暂态过程为消弧线圈电感与对地电容之间的欠阻尼串联谐振... 详细信息

系统对地电容的准确测量涉及消弧线圈容量配置、补偿度调整、故障点残流控制等一系列问题。该文利用谐振接地系统单相接地故障等效电路,分析了故障点熄弧后的电气特征,发现熄弧后暂态过程为消弧线圈电感与对地电容之间的欠阻尼串联谐振过程,可利用其谐振频率与衰减因子等参数计算系统失谐度,再根据补偿电感(含消弧线圈及接地变零序电感)可计算得到系统对地电容或电容电流。该方法的误差与谐振频率、衰减因子及补偿电感的误差有关,但主要取决于补偿电感误差。利用仿真和实际故障数据验证了该方法的有效性与准确度。作为被动测量方法,该方法不需要外加任何专用设备或调整现有设备运行状态,安全性高。

关键词：谐振接地系统电容电流测量熄弧暂态失谐度

Research and Design of Consistent Project Cases for the Software engineering Course Group

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计算机教育 2023年第12期 94-105页

作者： Junwei Du Guozhu Liu Quan Liu Xinglu Ma Meijiao xu Wenfeng Liu the college of information Science and Technology Qingdao University of Science and TechnologyQingdao266061China QST Innovation Technology Group Co. Ltd.Qingdao266000China

In order to enhance the abilities of practical innovation and solving complex engineering problems of students in the engineering context,we design a course cluster teaching model based on a unified enterprise-level project *** program divides the knowledge points required by the project into the corresponding courses,and divides their realization into the practical teaching cases,so as to realize the design of teaching practice cases embodied in the unified project *** model allows students to practice projects based on the unified project background while learning knowledge from different *** not only allows students to learn abstract,fragmented,and difficult-to-understand knowledge systems thoroughly,but also integrates the knowledge into the practice of the enterprise-level project development,helping students experience the value of knowledge in complex engineering projects and thus improving their ability to solve complex engineering problems while learning theoretical knowledge.

关键词： Software engineering Course group Course training Comprehensive project cases School-enterprise cooperation

A Transductive Support Vector Machine Algorithm Based on Ant Colony Optimization

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国际计算机前沿大会会议论文集 2016年第1期 35-37页

作者： xu Yu Chun-nian Ren Yan-ping Zhou Yong Wang School of information Science and Technology Qingdao University of Science and TechnologyQingdao266061China college of Computer Science and Technology Harbin Engineering UniversityHarbin150001China

Transductive support vector machine optimization problem is a NP problem, in the case of larger number of labeled samples, it is often difficult to obtain a global optimal solution, thereby the good generalization ability of transductive learning has been affected. Previous methods can not give consideration to both running efficiency and classification precision. In this paper, a transductive support vector machine algorithm based on ant colony optimization is proposed to overcome the drawbacks of the previous methods. The proposed algorithm approaches the approximate optimal solution of Transductive support vector machine optimization problem by ant colony optimization algorithm, and the advantage of transductive learning can be fully demonstrated. Experiments on several UCI standard datasets and the newsgroups 20 dataset showed that, with respect to running time and classification precision, the proposed algorithm has obvious advantage over the previous algorithms.

关键词： Transductive inference Support vector machine NP problem Ant colony optimization

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短生命周期海洋涡旋的时空分布特征

海洋学报 2019年第9期41卷 94-104页

作者：徐茗陈戈彭琳中国海洋大学信息科学与工程学院山东青岛266100 青岛海洋科学与技术试点国家实验室区域海洋动力学与数值模拟功能实验室山东青岛266100

中尺度涡旋在海洋中分布广泛,是海洋动力、营养物质等混合和输运的重要途径。统计发现海洋中超过80%的涡旋生命周期不超过1个月,属于本文定义的短生命周期涡旋。本研究采用统计、对比等方法,对全球尺度,较短生命周期涡旋的时空分布特征... 详细信息

中尺度涡旋在海洋中分布广泛,是海洋动力、营养物质等混合和输运的重要途径。统计发现海洋中超过80%的涡旋生命周期不超过1个月,属于本文定义的短生命周期涡旋。本研究采用统计、对比等方法,对全球尺度,较短生命周期涡旋的时空分布特征进行了分析。研究表明,短生命周期涡旋与大洋中环流系统密切相关,其最易发生在暖流和寒流的交汇处以及运动方向相反的两种环流的交汇处,且在除30°S^30°N的热带地区外均表现为气旋式略多于反气旋式。低纬地区,短生命周期涡旋在每年的冷季数量较多,而高纬地区与之相反。除存在大规模东向环流的海域,短生命周期涡旋一般向西迁移,同时气旋式涡旋略倾向于赤道偏转,反气旋式略倾向于极地偏转。短生命周期涡旋的平均位移和平均迁移速率呈相似的赤道对称分布规律。

关键词：中尺度涡旋短生命周期时空特征迁移

Corner Feature Extraction and Matching Method Constrained by Edge Region for Lunar-based Equipment Optical Navigation

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Corner Feature Extraction and Matching Method Constrained by...

Soft Variable Structure Control with Differential Equation for Generalized Systems

第43届中国控制会议

作者： Siqi Lu Rui xu Wei Shao Shengying Zhu School of Aerospace engineering Beijing Institute of Technology college of Automation and Electronic engineering Qingdao University of Science & Technology Shandong Key Laboratory of Autonomous Landing for Deep Space Exploration

Aiming at the unstructured environment of the lunar surface,and the problems such as gray scale changes and texture features are not obvious,a method for extracting and matching optical navigation features of lunar-based equipment under edge region constraints is *** setting double thresholds,weak edge pixels are suppressed to screen out edge information,an edge information domain is constructed,and accelerated robust feature descriptors of edge images are extracted and *** search range of corner detection is reduced effectively and the concentration of feature detection is *** we use the estimator sample consistency algorithm to eliminate the wrong matching,and finally achieve accurate matching while preserving the feature points of the lunar surface image.

关键词： Edge region Lunar-based equipment optical navigation Feature extraction and matching Feature screening

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Soft Variable Structure Control with Differential Equation f...

Identification of a novel astrovirus from intestinal tissue of a donkey foal with severe diarrhea in China

第26届中国控制与决策会议

作者： Ruiping xu Yunlong Liu Cunchen Gao Shuqin Wang college of information Science and engineering Ocean University of China college of Mathematics Science Qingdao University college of information and Control engineering Weifang University

Soft variable structure control（VSC） for generalized systems is concerned in the paper. The structural features of soft VSC with differential equation, and some preliminaries for generalized systems are given. The generalized soft variable structure controller is designed, and the stability of generalized systems with soft VSC is proposed by an equivalent characterization. The concrete algorithm of soft VSC with differential equation is given. The soft variable structure controller for generalized systems was carried out for the purpose of intentionally decreasing chattering, achieving high regulation rate, and shorting reaching time. It is illustrated the feasibility of the proposed method by a numerical example on a submarine dive model, and an outlook on its further development is proposed.

关键词： Generalized system Soft variable structure control Chattering Differential equation

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Zoological Research 2023年第5期44卷 932-935页

作者： Feng-Juan Tian Jing Li Qi-Hang Tu Shan xu Wen-Li Liu Yang Li Yu Bai Jie Yu Wen-Hua Liu Yue-Qiang Xiao Hui-Ying Ren Yi-Gang Tong Beijing Advanced Innovation Center for Soft Matter Science and engineering College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijing 100029China Jiamusi university School of Basic Medicine Jiamusi UniversityJiamusiHeilongjiang 154000China Dong-E-E-Jiao Co.Ltd Done-ELiaochengShandong 252000China college of Veterinary medicine Qingdao Agricultural UniversityQingdaoShandong 266000China Shandong Binzhou Animal Science and Veterinary Medicine Academy BinzhouShandong 256600China

DEAR EDITOR,Astroviruses are known to cause gastroenteritis and diarrhea symptoms in various ***,no information is currently available on any donkey astrovirus *** this study,we collected six intestinal samples from donkey foals that died of severe diarrhea on a donkey farm in Shandong Province,China,in *** on metagenomic nextgeneration sequencing,a nearly complete donkey astrovirus 1(DAstV-1)sequence was detected as the only possible diarrhea-related mammalian virus.

关键词： diarrhea Shandong currently

基于Lab VIEW与MATLAB混合编程的气液两相流测量软件开发

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实验室研究与探索 2018年第9期37卷 110-115页

作者：牛佳乐邢兰昌华陈权耿艳峰石文博中国石油大学(华东)信息与控制工程学院山东青岛266580

测量气液两相流量需要实时获取大量的数据和快速求解复杂的计算模型,单独采用LabVIEW或者MATLAB对其测量软件进行开发效率较低。为了高效地开发功能强大的虚拟仪器软件,应用动态链接库技术实现了LabVIEW与MATLAB的混合编程,在此基础上... 详细信息

测量气液两相流量需要实时获取大量的数据和快速求解复杂的计算模型,单独采用LabVIEW或者MATLAB对其测量软件进行开发效率较低。为了高效地开发功能强大的虚拟仪器软件,应用动态链接库技术实现了LabVIEW与MATLAB的混合编程,在此基础上开发了用于气液两相流组合测量装置的软件,解决了气液两相流参数测量系统需要进行大量数据实时采集、处理、显示、保存以及复杂多相流模型求解等问题。该软件开发方法适用于对人机交互界面、数据采集、仪器控制和数值计算同时具有较高要求的场合,可广泛应用于实验室和实际生产系统。

关键词：混合编程动态链接库软件开发气液两相流流量测量

Design of Experimental System of USB Data Acquisition Card-based Temperature Acquisition

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International Journal of Plant engineering and Management 2017年第1期22卷 27-32页

作者： LIU Xiao-feng WANG Yu-shun xu Zhong-yun YU Yong-fang college of Automation and Electrical engineering Qingdao University

In order to design a more efficient and more convenient temperature acquisition system, an approach combining USB data acquisition card with K type thermocouple temperature sensor is proposed under the circumstance of LabVIEW 2012 programming software. Firstly, the LabVIEW 2012 programming software is used to complete a temperature acquisition control program. Secondly, K type thermocouple temperature sensor is employed to transfer the temperature information. Thirdly, Then the USB data acquisition card can collect the voltage of K type thermocouple temperature sensor and convert it to a temperature scale. And, the simplification of experimental procedure can reduce the cost of development greatly. Finally, the experimental results illustrate that the range of measurement temperature is more wide and the temperature scale is more accurate.

关键词： LabVIEW 2012 USB data acquisition card K type thermocouple temperature sensor AD849