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THE SECOND RECIPROCAL DERIVATIVE POTENTIOMETRIC STRIPPING ANALYSIS

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Chinese Chemical Letters 1991年第11期2卷 859-860页

作者： xiang yuan ruan Ju Nan LI Jian Cheng DENG Yi Hen LI Nan JIANG Yong Hong LONG Department of Chemistry Xiangtan UniversityXiangtan 411105 Department of Physics Xiangtan UniversityXiangtan 411105 Department of Computer Science Xiangtan UniversityXiangtan

A theory of the second reciprocal derivative potentiometric stripping analysis with a mercury thin-film electrode is reported.

关键词： Cd Pb In SRD THE SECOND RECIPROCAL DERIVATIVE POTENTIOMETRIC STRIPPING ANALYSIS

Endozoochorous seed dispersal by golden snub-nosed monkeys in a temperate forest

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Integrative Zoology 2021年第1期16卷 120-127页

作者： Hui YAO Yanpei BAI yuan CHEN Haochun CHEN Wanji YANG xiangdong ruan Zuofu xiang Institute of Evolutionary Ecology and Conservation Biology Central South University of Forestry&TechnologyChangshaChina Shennongjia Forest District Shennongjia National ParkChina School of Life Sciences Sun Yat-Sen UniversityGuangzhouChina National Forest Inventory and Design Institute BeijingChina

Seed dispersal is essential for plant recruitment and the maintenance of *** monkeys are primarily folivorous,but they also consume fruits and are often assumed to be seed *** they are known to be epizoochorous seed dispersers,their role as endozoochorous seed dispersers needs *** examined potential endozoochory in golden snub-nosed monkeys(Rhinopithecus roxellana)at Dalongtan in Shennongjia National Park,central China,by assessing potential germination of ingested seeds(n=1806,9 species)from fecal *** seeds were in almost all fecal samples(ranging from 5-130 seeds),and ingested seeds were from small seeded species(seed width<4.5 mm).The 2 most abundant species were Actinidia arguta(73%)and Rosa caudata(15%).The fruits of *** were unripe when ingested(*** seed predation)and the ingested seeds did not germinate in the ***,ingestion of unripe seeds does not lead to effective seed ***,germination rates of defecated ***(9%)were greater than control seeds(6%and 0%),demon-strating potential endozoochorous seed ***,colobine monkeys do indeed disperse mainly small-seeded from multi-seeded fruits through potential endozoochory and this process enhances the recruitment of seedlings.

关键词： endozoochory germination seed dispersal seed recruitment temperate forest

Adaptive beam forming for time-variant channels with a multi-beam antenna

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The Journal of China Universities of Posts and Telecommunications 2008年第3期15卷 37-40页

作者： JIANG Ze MEI yuan-yuan ruan Wei College of Electronic Engineering Chongqing University of Posts and Telecommunications Chongqing 400065 China

A multi-beam adaptive antenna is investigated by considering the adaptive beam forming performance for time-variant channels on the focus of mobile to base station or reverse link. This antenna is constructed by Fresnel zone phase-correcting plane （FZP） focusing element and uniformly spaced feeds array. An estimator for the beamforming weight vector in the presence of angle spreads is derived using a code filtering approach. Owing to the time-varying nature of the channels, a recursive method for computing and tracking the above optimal weight vector solution that is easy to implement is applied. The effects of angle spread, maximum Doppler frequency, and forgetting factor are studied. Simulation results showed that this type of adaptive antenna is capable of performing adaptive beam forming for time-variant channels effectively.

关键词： adaptive antenna adaptive beam forming FZP mismatch loss

Inspection of reinforced concrete interface delamination using ultrasonic guided wave non-destructive test technique

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Science China(Technological Sciences) 2012年第10期55卷 2893-2901页

作者： LI DongSheng ruan Tao yuan JunHui State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China

An ultrasonic-guided wave(UGW) is a very promising tool in the field of structural health monitoring and non-destructive *** analysis was used to simulate the propagation in the rebar and explore the characteristics of UGW in the steel rebar ***-dimensional fast Fourier transform was used to process the numerical results and to evaluate the ***,different UGW test influence factors were *** results clearly showed that both the group velocity and the amplitude of longitudinal modes were not very sensitive to stress and temperature ***,the received UGW signal energy decreased with the increasing concrete ***,the interface condition between the concrete and the rebar was ***-domain and frequency-domain analyses were used to process the received *** interface delamination lengths of the UGW energy attenuation were analyzed and a relationship was *** study successfully proved that UGW is an effective tool in the non-destructive test of reinforced concrete interface delamination.

关键词： ultrasonic guided waves reinforced concrete interface delamination structural health monitoring

The life-saving emergency thoracic endovascular aorta repair management on suspected aortoesophageal foreign body injury

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World Journal of Emergency Medicine 2020年第3期11卷 152-156页

作者： Wei-shuyi ruan yuan-qiang Lu Department of Emergency Medicine the First Affi liated HospitalSchool of MedicineZhejiang UniversityHangzhou 310003China Department of Geriatric Medicine the First Affi liated HospitalSchool of MedicineZhejiang UniversityHangzhou 310003China Zhejiang Provincial Key Laboratory for Diagnosis and Treatment of Aging and Physic-chemical Injury Diseases the First Affi liated HospitalSchool of MedicineZhejiang UniversityHangzhou 310003China

BACKGROUND:Fatal aortic rupture caused by esophageal foreign body(EFB),is associated with a high mortality,but can be prevented by thoracic endovascular aorta repair(TEVAR)that performed increasingly as technology *** study aims to investigate the cause,management and prognosis of suspected penetrating aortoesophageal foreign body ***:Twelve cases who met the criteria were enrolled in this *** demographic and clinical data were reviewed for evaluating the characteristics of ***:Among 12 cases enrolled,7 were males and 5 were females,with an age 27–86 *** distance of EFB from aorta(DFA)of 7 cases were less than or equal to 0 mm,5 cases were 0–2 *** cases were managed with TEVAR,only one case was with open surgery standby but finally treated by flexible endoscopy(FE)successfully,without *** group with TEVAR,EFB of 7 cases were successfully removed by rigid endoscopy(RE),and one of them was failed at the first RE *** of 2 cases were successfully removed by open surgery with TEVAR,and other 9 cases were managed by endoscopies with *** mean length of stay of hospitalization(LOS)and length of ICU stay of patients treated by open surgery with TEVAR(18.50±2.12 days and 5.50±0.71 days)was significantly longer than those of patients treated by endoscopy with TEVAR(7.00±2.74 days and 1.33±1.12 days,P<0.001 and P=0.001,respectively).Five cases had severe ***:Rational application of TEVAR can be a life-saving management for aortoesophageal foreign body injury,and jointed with endoscopy is safe and effective with a shorter length of ICU or total hospital stay.

关键词： Aortoesophageal foreign body injury Thoracic endovascular aorta repair

Social functions of relaxed open-mouth display in golden snub-nosed monkeys(Rhinopithecus roxellana)

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Zoological Research 2019年第2期40卷 113-120页

作者： You-Ji Zhang Yi-Xin Chen Hao-Chun Chen yuan Chen Hui Yao Wan-Ji Yang xiang-Dong ruan Zuo-Fu xiang Institute of Evolutionary Ecology and Conservation Biology Central South University of Forestry & Technology College of Life Science and Technology Central South University of Forestry and Technology Shennongjia National Park National Forest Inventory and Design Institute

Relaxed open-mouth display serves important social functions in relation to submission, reconciliation affiliation and reassurance among non-human primate societies; however, quantitative evidence on this behavior remains insufficient among multi-level social groups. From July to November 2016, we examined four potential functions of the relaxed open-mouth display during pairwise, intra-unit social interactions among 18 free-ranging adult and sub-adult golden snub-nosed monkeys(Rhinopithecus roxellana) who belonged to three one-male, multi-female units(OMU) at Dalongtan, Shennongjia National Park China. Results showed that: compared with no relaxed open-mouth display,(1) the occurrence of displacement by a dominant individual approaching a subordinate was lower and the distance of the subordinate to the approaching dominant was shorter when the subordinate showed open-mouth display;(2) relaxed open-mouth display reduced the probability of continued attack for victims of aggression and allowed victims to achieve closer proximity to the aggressor during post-conflict periods;(3) relaxed open-mouth display by dominant individuals allowed them to achieve closer proximity to subordinates; and(4) the exchange of relaxed open-mouth display had a greater impact on the outcome of interactions than one individual alone giving this signal. These findings suggest that relaxed open-mouth display serves important functions regarding submission, reconciliation, affiliation and reassurance in coordinating social interactions within OMUs in golden snub-nosed monkeys.

关键词： Golden snub-nosed monkey Open- mouth Submission Reconciliation Affiliation Reassurance

Moldability Evaluation for Molded Parts Based on Fuzzy Reasoning

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High Technology Letters 2002年第2期8卷 62-67页

作者：王玉 Xing yuan ruan Xueyu National Die&Mold CAD Engineering Research Center Shanghai Jiaotong UniversityShanghai 200030 P.R.China

Moldability evaluation for molded parts, which is the basis of concurrent design, is a key design stage in injection molding design. By moldability evaluation the design problems can be found timely and an optimum plastic part design achieved. In this paper, a systematic methodology for moldability evaluation based on fuzzy logic is proposed. Firstly, fuzzy set modeling for six key design attributes of molded parts is carried out respectively. Secondly, on the basis of this, the relationship between fuzzy sets for design attributes and fuzzy sets for moldability is established by fuzzy rules that are based on domain experts’ experience and knowledge. At last the integral moldability for molded parts is obtained through fuzzy reasoning. The neural network based fuzzy reasoning approach presented in this paper can improve fuzzy reasoning efficiency greatly, especially for system having a large number of rules and complicated membership functions. An example for moldability evaluation is given to show the feasibility of this proposed methodology.

关键词： moldability fuzzy reasoning neural networks evaluation

Multiplayer Reach-Avoid Differential Games in 3D Space Inspired by Harris'Hawks'Cooperative Hunting Tactics

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Research 2024年第2期2023卷 41-54页

作者： Wanying ruan Haibin Duan Yongbin Sun Wanmai yuan Jie Xia State Key Laboratory of Virtual Reality Technology and Systems School of Automation Science and Electrical EngineeringBeihang UniversityBeijingChina Peng Cheng Laboratory ShenzhenChina Information Science Academy of CETC BeijingChina

This paper investigates a multiplayer reach-avoid differential game in 3-dimensional(3D)space,which involves multiple pursuers,multiple evaders,and a designated target *** evaders aim to reach the target region,while the pursuers attempt to guard the target region by capturing the *** class of research holds significant practical ***,the complexity of the problem escalates substantially with the growing number of players,rendering its solution extremely *** this paper,the multiplayer game is divided into many subgames considering the cooperation among pursuers,reducing the computational burden,and obtaining numerically tractable strategies for ***,the Apollonius sphere,a fundamental geometric tool for analyzing the 3D differential game,is formulated,and its properties are *** on this,the optimal interception point for the pursuer to capture the evader is derived and the winning conditions for the pursuer and evader are ***,based on the Apollonius sphere,the optimal state feedback strategies of players are designed,and simultaneously,the optimal one-to-one pairings are ***,the Value function of the multiplayer reach-avoid differential game is explicitly given and is proved to satisfy Hamilton-Jacobi-Isaacs(HJI)***,the matching algorithm for the case with pursuers outnumbered evaders is provided through constructing a weighted bipartite graph,and the cooperative tactics for multiple pursuers are proposed,inspired by the Harris'Hawks intelligent cooperative hunting ***,numerical simulations are conducted to illustrate the effectiveness of the theoretical results for both cases where the number of adversary players is equal and unequal between the 2 groups.

关键词： holds satisfy rendering

Nonlinear excitation controller design for power systems:an I&I approach

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控制理论与应用（英文版） 2012年第4期10卷 554-558页

作者： Rongxiang yuan Yang ruan Po HU School of Electrical Engineering Wuhan University

The Immersion and Invariance （I＆I） methodology provides a novel approach for nonlinear system control, which is distinct from the traditional feedback linearization and backstepping method. In this paper, a new excitation controller is designed for single machine infinite bus system （SMIBS） based on the I＆I approach. Firstly the dynamic model of SMIBS is homeomorphously transformed to a specific form for which a stable lower-order target system is selected. Then the I＆I excitation controller is designed by immersing the transformed system into the target system. Simulation results from PSCAD/EMTDC demonstrate that the proposed controller guarantees transient stability of the system after large disturbances.

关键词： Power systems Excitation control Nonlinear control Immersion and invariance