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Comparison of the effects of soil moisture and El Nino on summer precipitation in eastern China

Science China Earth Sciences 2020年第2期63卷 267-278页

作者： Juan ZHOU zhiyan ZUO Xinyao RONG State Key Laboratory of Severe Weather Chinese Academy of Meteorological Sciences

The effects of spring soil moisture over the vast region from the lower and middle reaches of the Yangtze River valley to North China(YRNC) and El Ni?o on the East Asian summer monsoon(EASM) and precipitation in eastern China, as well as the relevant mechanisms, are investigated using the modified atmospheric model ECHAM5 coupled with the Common Land Model. These models are the atmospheric and land components of the climate system model developed at the Chinese Academy of Meteorological Sciences(CAMS-CSM). The simulations show that both soil moisture anomalies in eastern China and El Ni?o sea surface temperature(SST) anomalies have significant influences on the EASM, with the effect of soil moisture being slightly greater than that of the El Ni?o. However, the impacts of soil moisture on EASM and rainfall in eastern China are markedly different from those of the El Ni?o. Wetter(drier) soil over the YRNC corresponds to less(more) precipitation over northern and southeastern China, and more(less) precipitation over the Yangtze River basin and northeastern China, as well as a strengthened(weakened) and westward-shifted(eastward-shifted) West Pacific Subtropical High and a deepened(shallower) East Asian trough, representing a weakened(strengthened) EASM pattern. during El Ni?o developing summers, an anomalous anticyclone extends from northeastern to northern China, and an anomalous cyclone occupies the middle and lower reaches of the Yangtze River and southern China. Concurrently, the West Pacific Subtropical High is anomalously weaker than normal. As a result,rainfall anomalously increases over the lower reaches of the Yangtze River and southern China, and decreases over northern and northeastern China. In El Ni?o decaying summers, there is an anomalous cyclone over northeastern China and an anomalous anticyclone over southern China. The convergence of southerly airflow and northerly winds leads to enhanced rainfall around northern China and the middle reaches of the Y

关键词： Soil moisture El Nino East Asian summer monsoon Precipitation Numerical simulation

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Control of chiral-optical activities by magnetic field based on the transformation of achiral binary crystals into chiral ternary crystals

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Science China Chemistry 2024年第7期67卷 2300-2305页

作者： zhiyan Chen Yan Lv Wei Qin College of Physics Qingdao UniversityQingdao 266071China School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100China Shandong Linuo Photovoltaic Hi-Tech Co. Ltd.Jinan 250100China

Multicomponent self-assembled chiral systems have attracted great attention due to their promising application in the area of spin-photonics and *** this work,through introducing an achiral third component into an achiral binary crystal,a chiral organic ternary crystal is fabricated,where both pronounced chiral-optical coupling and magnetic field dependence of chiral-optical activities are *** transformation of achiral structure into chiral structure generates a significant effect on the polarized state of light and the electron spin resonance ***,the coupling between circularly polarized photon and spin is observed in chiral ternary crystal with pronounced chiral orbit,where obvious magnetic field-transmissivity loop is ***,temperature could increase the magnitude of lattice parameters to lead to a larger helix radius to increase the chiral orbit ***,this work indicates that the further exploration of photon-chiral orbit-spin interactions in organic chiral ternary crystals is promising.

关键词： organic chiral ternary crystals chiral orbit chiral-optical activities magnetic field

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非住院老年骨折病人对家庭护理服务需求的质性研究

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护理研究（上旬版） 2008年第3期22卷 647-648页

作者：张志燕杜雪梅张淑艳安娜孙艳杰牛亚军河北省唐山市第二医院

[目的]了解非住院老年骨折病人对家庭护理服务的需求。[方法]应用质性研究中现象学观点构成的方法,采用非结构式深度访谈法和观察法了解老年骨折病人对家庭护理服务的认识和主观需求。[结果]老年非住院骨折病人对专业家庭护理服务表现... 详细信息

[目的]了解非住院老年骨折病人对家庭护理服务的需求。[方法]应用质性研究中现象学观点构成的方法,采用非结构式深度访谈法和观察法了解老年骨折病人对家庭护理服务的认识和主观需求。[结果]老年非住院骨折病人对专业家庭护理服务表现出极大的兴趣,渴望建立家庭护理服务中心,希望得到上门服务。其需求主要为:对家庭病房的需求,骨折合并内科疾病相关护理知识的需求,对个性化与"家属互动式"的健康教育服务的需求,对互动式信息托管系列服务的需求,对功能康复训练系列护理服务的需求。需要提供的具体护理内容为:体位护理、入厕、更衣、营养、拐杖的使用、石膏的专业护理、骨折合并内科疾病的个性化护理。[结论]家庭护理服务是非住院老年骨折病人的普遍需求,是我国家庭护理应重视的方面。

关键词：老年人骨折家庭护理需求质性研究

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A New Noise-Tolerant dual-Neural-Network Scheme for Robust Kinematic Control of Robotic Arms With Unknown Models

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IEEE/CAA Journal of Automatica Sinica 2022年第10期9卷 1778-1791页

作者： Ning Tan Peng Yu zhiyan Zhong Fenglei Ni IEEE the School of Computer Science and Engineering&Key Laboratory of Machine Intelligence and Advanced Computing Ministry of EducationSun Yat-sen UniversityGuangzhou 510006China the School of Automation Guangdong Polytechnic Normal UniversityGuangzhou 510665China the State Key Laboratory of Robotics and Systems Harbin Institute of Technology(HIT)Harbin 150080China

Taking advantage of their inherent dexterity,robotic arms are competent in completing many tasks *** a result of the modeling complexity and kinematic uncertainty of robotic arms,model-free control paradigm has been proposed and investigated ***,robust model-free control of robotic arms in the presence of noise interference remains a problem worth *** this paper,we first propose a new kind of zeroing neural network(ZNN),i.e.,integration-enhanced noise-tolerant ZNN(IENT-ZNN)with integration-enhanced noisetolerant ***,a unified dual IENT-ZNN scheme based on the proposed IENT-ZNN is presented for the kinematic control problem of both rigid-link and continuum robotic arms,which improves the performance of robotic arms with the disturbance of noise,without knowing the structural parameters of the robotic *** finite-time convergence and robustness of the proposed control scheme are proven by theoretical ***,simulation studies and experimental demonstrations verify that the proposed control scheme is feasible in the kinematic control of different robotic arms and can achieve better results in terms of accuracy and robustness.

关键词： dual zeroing neural networks(ZNN) finite-time convergence model-free robot control robustness analysis

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上海世博会电力电缆隧道工程设计综述

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特种结构 2009年第6期 7-10页

作者：倪镭杜一鸣周质炎汪敏张佳上海市电力公司上海市政工程设计研究总院

随着城市经济的快速发展和用电负荷的逐年增加,现有的输电设施已不能满足经济发展需求。大直径电缆隧道是解决城市内大容量电力输送的有效形式。本文主要结合工程实际,介绍大直径电缆隧道的设计概况,供有关专业设计参考。

关键词：电缆隧道盾构顶管法近距离穿越

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Variations of widespread extreme cold and warm days in winter over China and their possible causes

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Science China Earth Sciences 2022年第2期65卷 337-350页

作者： zhiyan ZUO Mingqian LI Ning AN Dong XIAO State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijing 100081China Department of Atmospheric and Oceanic Sciences/Institute of Atmospheric Sciences/IRDR-International Center of Excellence Fudan UniversityShanghai 200348China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and TechnologyNanjing 210044China

The two leading modes of winter surface air temperature(SAT) over China during 1961–2017 are a spatially consistent pattern and a north-south dipole pattern. Based on the two leading modes, the characteristics of the extreme cold and warm days in the two patterns, defined by the standard deviation larger than 1.28 or smaller than-1.28 in the time series of the two leading modes, are analyzed. With the increase of winter SAT during 1961–2017, the number of spatially consistent extreme cold days decreased and their occurrence was restricted to late December to early January, whereas the number of spatially consistent extreme warm days increased significantly in January and February. Global warming is associated with an increase in the spatially consistent extreme warm days and a decrease in spatially consistent extreme cold days, but has little relation to the sum of extreme cold and warm days of either the spatially consistent or north-south dipole pattern. The Siberian High(SH) is the main factor controlling the sum of spatially consistent extreme warm and cold days. The strong(weak) SH before(after) the1990 s corresponds to an increase(decrease) in the sum of the spatially consistent extreme warm and cold days. The occurrences of extreme south-cold-north-warm and extreme south-warm-north-cold days are related to the north-south difference of the *** the center of the SH is in mid-high latitudes, the extreme south-warm-north-cold(south-cold-north-warm) days occur more(less) often. during the winters of 1961–2017, the total number of extreme cold and warm days of the north-south dipole pattern changes negligibly. The North Atlantic meridional overturning circulation(AMOC) may be the main factor affecting the sum of the extreme cold and warm days of the two types of SAT pattern in China.

关键词： Surface air temperature Extreme cold days Extreme warm days Siberian High North Atlantic meridional overturning circulation

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COMP ARISON OF MACROMOLECULAR COMPONENT DISTRIBUTIONS IN OSTEOARTHRITIC AND HEALTHY CARTILAGES BY FOURIER TRANSFORM INFRARED IMAGING

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Journal of Innovative Optical Health Sciences 2013年第4期6卷 84-90页

作者： JIANHUA YIN YANG XIA zhiyan XIAO Department of Biomedical Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 P.R.China Department of Physics and Center for Biomedical Research Oakland University RochesterMI 48309USA Department of Radiation Oncology Washington University School of Medicine St.Louis MO 63110USA

Fourier transform infrared imaging(FTIRI)was used to examine the depth-dependent content variations of macromolcular components,ollagen and protooglycan(PG),in osteoarthritic and healthy *** 6 pmm thick sections of canine knee cartilages were imaged at 6.25 pμrm pixel-size in *** analyzing the infrared(IR)images and spectra,the depth dependence of characteristic band(sugar)intensity of PG show obvious difference bet ween the cartilage sections of(OA)and *** result confimns that PG content decreases in the ostcoarthritic ***,no clear change occurs to collagen,suggesting that the OA influences little on the collagen content at early stage of *** observation will be helpful to further understand PG loss associated with pathological conditions in OA,and demonstrates that FIIRI has the po-tential to become an important analytical tool to identify early clinical signs of tissue degna-dation,such as PG loss even collagen disruption.

关键词： Macromolecular component osteoarthritis articular cartilage Fourier transform infrared imaging(FTIRI)

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The spring soil moisture and the summer rainfall in eastern China

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Chinese Science Bulletin 2007年第23期52卷 3310-3312页

作者： ZUO zhiyan ZHANG RenHe State Key Laboratory of Severe Weather Chinese Academy of Meteorological Sciences Beijing 100081 China

The relation between the soil moisture in spring and the rainfall in summer in eastern China is investi- gated. Results show that the summer rainfall in eastern China is closely related to the spring soil moisture in the area from North China to the lower reaches of Yangtze River (NCYR). When spring soil moisture anomalies over NCYR are positive, the summer precipitation exhibits positive anomalies in Northeast China and the lower reaches of Yangtze River, and negative anomalies in southern China and North China. The higher soil moisture over NCYR cools land surface and reduces the land-sea tem- perature gradient, which weakens East Asian summer monsoon. The western Pacific Subtropical High (WPSH) is located to the south and shifts westward, resulting in more rainfall in the lower reaches of Yangtze River and less in southern China and North China.

关键词：土壤湿度夏季中国气候

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Dynamic Uplink Transmission Scheduling for Satellite Internet of Things Applications

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China Communications 2020年第10期17卷 241-248页

作者： Li Wang Shuaijun Liu Weidong Wang zhiyan Fan Beijing University of Posts and Telecommunications Beijing 100876China China Academy of Information and Communications Technology Beijing 100191China Institute of Software Chinese Academy of Sciences Beijing 100190China

Satellite communication systems provide a cost-effective solution for global internet of things(IoT)applications due to its large coverage and easy *** paper mainly focuses on Satellite networks system,in which low earth orbit(LEO)satellites network collect sensing data from the user terminals(UTs)and then forward the data to ground station through geostationary earth orbit(GEO)satellites *** the limited uplink transmission resources,this paper optimizes the uplink transmission scheduling scheme over LEO satellites.A novel transmission scheduling algorithm,which combined Algorithms of Simulated Annealing and Monte Carlo(SA-MC),is proposed to achieve the dynamic optimal scheduling *** results show the effectiveness of the proposed SA-MC algorithm in terms of cost value reduction and fast convergence.

关键词： satellite IoT transmission scheduling resource allocation simulated annealing Monte Carlo

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Speech Emotion Recognition Based on Wavelet Transform and Improved HMM

Speech Emotion Recognition Based on Wavelet Transform and Im...

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第25届中国控制与决策会议

作者： HAN zhiyan WANG Jian College of Engineering Bohai University College of Information Science & Engineering Northeastern University

ISBN: (纸本)9781467355339

We proposed a novel speech emotion recognition method by use of Wavelet Transform and Hidden Markov Model （HMM） to classify five discrete emotional states: anger, fear, joy, sadness and surprise. The system is comprised of three main parts, a preprocessing part, a feature extracting part and a recognition part. In the feature extracting part, due to Fourier Transform uses fixed sized windows, we consider using Wavelet Transform to extract the emotion features. In the recognition part, we use improved HMM as the emotion recognizer. We test this method in the Chinese corpus of emotional speech synthesis database. The test result shows that the method is effective and high speed.

关键词： Speech Signal Emotion Recognition Wavelet Transform HMM

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