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Spatial and temporal variation of runoff of Red River Basin in Yunnan

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Journal of Geographical Sciences 2008年第3期18卷 308-318页

作者： LI yungang he Daming YE Changqing Asian International Rivers Center Yunnan University Kunming 650091 China

This paper studies the variation of runoff of Red River Basin and discusses the influence of＂corridor-barrier＂functions of valleys and mountains on variation of runoff by using GIS and statistic methods based on the monthly precipitation,temperature and evaporation data from 1960 to 2000 at 32 meteorological stations in Red River Basin,and the annual runoff data of Yuanjiang River,Lixian River and Panlong River from 1956 to *** results show out：（1）Under the effect of＂corridor-barrier＂functions of valleys and mountains in Red River Basin,the patterns of annual precipitation and runoff depth distribution in spatial change a NW-SE direction,which is similar with the trend of the Red River valley and Ailao mountains.（2）In the long temporal scale averaged over years,the most obvious effects of the＂corridor-barrier＂functions is on runoff variation,and the second is on the precipitation, but not obvious on the temperature.（3）Under the superposed effect of climate changes and the＂corridor-barrier＂functions of valleys and mountains in Red River Basin,the difference of runoff variation is obvious in the east-west direction：the runoff variation of Yuanjiang River along the Red River Fault present an ascending trend,but the Lixian River on the west side of the Fault and the Panlong River on the east present a descending trend;the annual runoff in Yuanjiang River and Panlong River had a quasi-5a periods,and Panlong River had a quasi-8a periods;the runoff variation are quite inconsistent in different periods among the three river basins.

关键词： runoff "corridor-barrier" functions Longitudinal Range-gorge Region Red River Basin

Global adaptive output-feedback tracking with prescribed performance for uncertain nonlinear systems

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Science China(Information Sciences) 2024年第5期67卷 150-164页

作者： Yuan WANG yungang LIU School of Control Science and Engineering Shandong University

At present, one typical control strategy for guaranteeing transient and steady-state performance is funnel control and prescribed performance control. The strategy features completely discarding the system nonlinearities, even if they are completely known and available. Such an intrinsic feature requires the controller to produce a larger control effect to eliminate the negative impact caused by the high nonlinearities, leading to a conservative controller. In this paper, we fully take advantage of known information on nonlinearities in control design, instead of completely discarding it as done in funnel control. Particularly, we leverage adaptive techniques(i.e., high-gain dynamic compensation) to deal with unknown system nonlinearities. Meanwhile, we integrate the tools of output feedback, tracking control, and the performance *** such, an adaptive output-feedback scheme is developed for global tracking with spatiotemporal performance specifications: arbitrarily given tracking accuracy and accuracy-ensured time. A simulation example supports the developed approach.

关键词： uncertain nonlinear systems output feedback prescribed performance unknown control direction dynamic high gain global tracking

dbDEMC 3.0:Functional Exploration of Differentially Expressed miRNAs in Cancers of Human and Model Organisms

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Genomics, Proteomics & Bioinformatics 2022年第3期20卷 446-454页

作者： Feng Xu Yifan Wang Yunchao Ling Chenfen Zhou Haizhou Wang Andrew E.Teschendorff Yi Zhao Haitao Zhao yungang he Guoqing Zhang Zhen Yang Center for Medical Research and Innovation of Pudong Hospital Fudan University Pudong Medical CenterShanghai 201399China Institutes of Biomedical Science Shanghai Key Laboratory of Medical EpigeneticsInternational Co-laboratory of Medical Epigenetics and Metabolism(Ministry of Science and Technology)Fudan UniversityShanghai 200032China Bio-Med Big Data Center CAS Key Laboratory of Computational BiologyShanghai Institute of Nutrition and HealthUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200031China CAS Key Laboratory of Computational Biology Shanghai Institute of Nutrition and HealthUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200031China Institute of Computing Technology Chinese Academy of SciencesBeijing 100190China Department of Liver Surgery Peking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China Shanghai Fifth People’s Hospital Fudan UniversityShanghai 200240China

MicroRNAs(miRNAs)are important regulators in gene *** dysregulation of miRNA expression is widely reported in the transformation from physiological to pathological states of cells.A large number of differentially expressed miRNAs(DEMs)have been identified in various human cancers by using high-throughput technologies,such as microarray and *** mining of published studies with high-throughput experiment information,the database of DEMs in human cancers(dbDEMC)was constructed with the aim of providing a systematic resource for the storage and query of the *** we report an update of the dbDEMC to version 3.0,which contains two-fold more data entries than the second version and now includes also data from mice and *** dbDEMC 3.0 contains 3268 unique DEMs in 40 different cancer *** current datasets for differential expression analysis have expanded to 9 generalized ***,the current release integrates functional annotations of DEMs obtained by using experimentally validated *** annotations can be of great benefit to the intensive analysis of the roles of DEMs in *** summary,dbDEMC 3.0 provides a valuable resource for characterizing molecular functions and regulatory mechanisms of DEMs in human *** dbDEMC 3.0 is freely accessible at https://***/dbDEMC.

关键词： MicroRNA Cancer Differential expression Model organism Database

Spatiotemporal pattern of climate change in the China-Myanmar Economic Corridor from 1901 to 2018

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Journal of Mountain Science 2024年第1期21卷 131-145页

作者： YANG Xiaoliu LI yungang GAO Lu Institute of Geography Fujian Normal UniversityFuzhou 350117China School of Geographical Sciences Fujian Normal UniversityFuzhou 350117China Institute of International Rivers and Eco-Security Yunnan UniversityKunming 650500China Fujian Provincial Engineering Research Center for Monitoring and Accessing Terrestrial Disasters Fujian Normal UniversityFuzhou 350117China Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education Fujian Normal UniversityFuzhou 350117China

The China-Myanmar Economic Corridor(CMEC) is an important part of China's Belt and Road Initiative and an important area for global ecology and biodiversity. In this study, the annual and seasonal spatiotemporal patterns of temperature and precipitation in the CMEC over the past century were investigated using linear tendency estimation, the Mann-Kendall mutation test, the T-test, and wavelet analysis based on the monthly mean climatic data from 1901 to 2018 released by the Climatic Research Unit(CRU) of the University of East Anglia, UK. The results show that the CMEC demonstrated a trend of warming and drying over the past 100 years, and the rate of change in Myanmar was stronger than that in Yunnan Province of China. The warming rate was 0.039 ℃/10a. Precipitation decreased at a rate of -6.1 mm/10a. From the perspective of spatial distribution, temperature was high in the central and southern, low in the north of the CMEC, and the high-temperature centers were mainly distributed in the southern plain and river valley. Precipitation decreased from west to east and from south to north of the CMEC. From the perspective of the rate of change, warming was stronger in central and northern CMEC than in southern and northeastern CMEC. The rate of precipitation decline was stronger in the central and western regions than in the eastern region. This study provides a scientific reference for the CMEC to address climate change and ensure sustainable social and economic development and ecological security.

关键词： China-Myanmar Economic Corridor CRU Air temperature Precipitation Spatiotemporal pattern

AWeb Application Fingerprint Recognition Method Based on Machine Learning

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Computer Modeling in Engineering & Sciences 2024年第7期140卷 887-906页

作者： Yanmei Shi Wei Yu Yanxia Zhao yungang Jia School of Integrated Circuit Science and Engineering Tianjin University of TechnologyTianjin300382China College of International Business Zhejiang Yuexiu UniversityShaoxing312030China School of Public Administration Zhejiang Gongshang UniversityHangzhou310018China Tianjin Branch of National Computer Network Emergency Response Technical Team/Coordination Center of China Tianjin300100China

Web application fingerprint recognition is an effective security technology designed to identify and classify web applications,thereby enhancing the detection of potential threats and *** fingerprint recognition methods,which rely on preannotated feature matching,face inherent limitations due to the ever-evolving nature and diverse landscape of web *** response to these challenges,this work proposes an innovative web application fingerprint recognition method founded on clustering *** method involves extensive data collection from the Tranco List,employing adjusted feature selection built upon Wappalyzer and noise reduction through truncated SVD dimensionality *** core of the methodology lies in the application of the unsupervised OPTICS clustering algorithm,eliminating the need for preannotated *** transforming web applications into feature vectors and leveraging clustering algorithms,our approach accurately categorizes diverse web applications,providing comprehensive and precise fingerprint *** experimental results,which are obtained on a dataset featuring various web application types,affirm the efficacy of the method,demonstrating its ability to achieve high accuracy and broad *** novel approach not only distinguishes between different web application types effectively but also demonstrates superiority in terms of classification accuracy and coverage,offering a robust solution to the challenges of web application fingerprint recognition.

关键词： Web application fingerprint recognition unsupervised learning clustering algorithm feature extraction automated testing network security

ACTIVE VIBRATION CONTROL OF A CANTILEVER BEAM USING PIEZOELECTRIC SENSORS AND ACTUATORS

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Transactions of Nanjing University of Aeronautics and Astronautics 1997年第1期14卷 70-75页

作者： Lu Xiaobo Tao yungang he Yanwei Department of Measurement and Testing Engineering, NUAA29 Yudao Street, Nanjing 210016, P. R. China

The topic of vibration control with distributed actuators has been the subject of many researches. This paper is concerned with the vibration control of a cantilever beam equipped with piezoelectric ceramics as sensors and actuators. One piezoelectric ceramic is bonded to the structure and provides control input for the structure, while the other piezoelectric ceramic provides the feedback signal. An approach to identification and control is presented. Observation spillover is eliminated by prefiltering the sensor data. A procedure used to determine actuator and sensor location, is discussed based on the modes to be controlled. Finally, the experimental results are presented to verify the proposed method.

关键词： vibration system identification sensor actuator piezoelectric materials cantilever beam

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高地应力软岩隧道长期稳定性分析

铁道工程学报 2024年第4期41卷 60-67,89页

作者：邓云纲中铁第四勘察设计院集团有限公司武汉430063

研究目的:高地应力软岩具有明显的流变特性,流变过程中岩体参数随时间发生变化。本文结合梁王山隧道的设计施工方案,采用Cvisc模型对其施工过程及运营期间的围岩和支护的受力和变形情况进行分析,查明了隧道在施工阶段和长期运营阶段的... 详细信息

研究目的:高地应力软岩具有明显的流变特性,流变过程中岩体参数随时间发生变化。本文结合梁王山隧道的设计施工方案,采用Cvisc模型对其施工过程及运营期间的围岩和支护的受力和变形情况进行分析,查明了隧道在施工阶段和长期运营阶段的应力、应变和变形特性以及隧道支护结构的内力与变形随时间发展规律。研究结论:(1)在软岩隧道工程施工中,施工时应对隧道初支拱脚处适当加固,控制拱脚变形;(2)不仅要保证施工期的安全,更需要关注隧道在后期运营过程中的长期稳定性;(3)需根据全寿命周期内的围岩流变稳定状态设计支护结构的刚度,从而确保隧道结构长期稳定;(4)本研究成果可为高地应力软岩隧道施工安全和长期稳定性研究提供参考。

关键词：软岩隧道长期稳定性流变高地应力数值模拟

The mutation network for the hemagglutinin gene from the novel influenza A (H1N1) virus

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Chinese Science Bulletin 2009年第13期54卷 2168-2170页

作者： he yungang DING GuoHui BIAN Chao HUANG Zhong LAN Ke SUN Bing WANG XueCai LI YiXue WANG HongYan WANG XiaoNing YANG Zhong ZHONG Yang JIN WeiRong XIONG Hui DAI JianXin GUO YaJun WANG Hao Che XiaoYan WU Fan YUAN ZhenAn ZHANG Xi CAO ZhiWei ZHOU XiaoNong ZHOU JiaHai MA ZhiYong TONG GuangZhi ZHAO GuoPing JIN Li Shanghai Institutes of Biological Sciences Chinese Academy of Sciences (Key Laboratory of Computational Biology CAS-MPG Partner Institute of Computational Biology Center of Bioinformatics Key Lab of System Biology Lab of Synthetic Biology Institute of Plant Physiology & Ecology Institute Pasteur) Shanghai 200031 China School of Life Sciences Fudan University Shanghai 200433 China Shanghai-MOST Key Laboratory for Disease and health Genomics Chinese National Human Genome Center at Shanghai Shanghai 201203 China Cancer Institute Second Military Medical University Shanghai 200433 China School of Life Sciences and Technology South China University of Technology Guangzhou 510641 China National Engineering Research Center for Antibody Drugs Shanghai 201203 China Zhujiang Hospital Southern Medical University G uangzhou 510282 China Shanghai Municipal Center for Disease Control & Prevention Shanghai 200336 China Shanghai Center for Bioinformation Technology Shanghai 200235 China School of Life Sciences and Technology Tongji University Shanghai 200092 China National Institute for Parasitic Diseases Chinese Center for Disease Control and Prevention Shanghai 200025 China Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China Shanghai Veterinary Research Institute Chinese Academy of Agricultural Sciences Shanghai 200241 China National Engineering Research Center for Biochip Technology Shanghai Biochip Co. Ltd Shanghai 201203 China

A mutation network for the hemagglutinin gene(HA) of the novel type A(H1N1) influenza virus was *** homology analysis indicated that one HA sequence type from the viruses mainly isolated from Mexico was likely the original type in this *** on the 658A and 1408T mutations in HA,the viruses evolving into this epidemic were divided into three categories,the Mexico,the transitional and the New York *** three groups of viruses presented distinctive clustering features in their geographic distributions.

关键词：流感病毒血凝素基因流行性感冒突变网络序列类型同源性分析地理分布

乙二胺三氟乙酸盐催化硝基烷烃与芳香醛缩合制备各种取代的硝基烯烃

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有机化学 2018年第4期38卷 890-895页

作者：黄中寿朱星亮何云刚李风雷孟天卓施小新华东理工大学药学院上海市化学生物学重点实验室上海200237

描述了乙二胺三氟乙酸盐(EDA-TFA)催化硝基烷烃与芳香醛缩合制备各种取代硝基烯烃的通用方法.文中考察了乙二胺与各种酸的铵盐以及三氟乙酸与各种胺的铵盐对醛与硝基烷烃缩合反应的催化性能,并考察了不同溶剂对反应的影响,研究发现乙二... 详细信息

描述了乙二胺三氟乙酸盐(EDA-TFA)催化硝基烷烃与芳香醛缩合制备各种取代硝基烯烃的通用方法.文中考察了乙二胺与各种酸的铵盐以及三氟乙酸与各种胺的铵盐对醛与硝基烷烃缩合反应的催化性能,并考察了不同溶剂对反应的影响,研究发现乙二胺三氟乙酸盐(EDA-TFA)催化能力相对较强,二甲基亚砜(DMSO)作溶剂反应收率较高.在5mol%的EDA-TFA作催化剂以及DMSO作溶剂情况下,硝基烷烃与芳香醛进行"一锅法"缩合反应,以82%~96%高收率得到各种取代的硝基烯烃.

关键词：醛乙二胺三氟乙酸盐硝基烷烃硝基烯烃