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Journal of Systems Science and Systems Engineering 2014年第2期23卷 231-247页

作者： Xihua LI xiaohong chen School of Business Central South University

Considering the decision maker＇s risk psychological factors and information ambiguity under uncertainty, a novel TOPSIS based on prospect theory （PT） and trapezoidal intuitionistic fuzzy numbers （YrIFNs） for group decision making is investigated, in which the criteria values and the criteria weights take the form of TrIFNs, and weights of decision makers are unknown. Firstly, distance measures for TrIFNs are used to induce value function under trapezoidal intuitionistic fuzzy environment. Secondly, the concepts of distance measures and trapezoidal intuitionistie fuzzy weighted averaging operator are employed to induce the weights of decision makers and thus the decision makers＇ options can be aggregated. Then the PT-based separation measures and relative closeness coefficient are defined and an algorithm for ranking alternatives under trapezoidal intuitionistic fuzzy environment is proposed. Finally, a numerical example further illustrates the practicality and effectiveness of the proposed TOPSIS method.

关键词： TOPSIS trapezoidal intuitionistic fuzzy numbers prospect theory group decision making distance measures

Toxicity-oriented water quality engineering

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Frontiers of Environmental Science & Engineering 2020年第5期14卷 47-54页

作者： Shengkun Dong chenyue Yin xiaohong chen Guangdong Engineering Technology Research Center of Water Security Regulation and Control for Southern China Guangzhou 510275China Key Laboratory of Water Cycle and Water Security in Southern China of Guangdong Higher Education Institute School of Civil EngineeringSun Yat-sen UniversityGuangzhou 510275China

The fundamental goal of water quality engineering is to ensure water safety to humans and the *** water quality engineering consists of monitoring,evaluation,and control of key water quality *** approach provides some vital insights into water quality,however,most of these parameters do not account for pollutant mixtures-a reality that terminal water users face,nor do most of these parameters have a direct connection with the human health safety of *** puts the real health-specific effects of targeted water pollutant monitoring and engineering control in *** focus our attention to one of the original goals of water quality engineering-human health and environmental protection,we advocate here the toxicity-oriented water quality monitoring and *** article presents some of our efforts towards such ***,complementary to traditional water quality parameters,we evaluated the water toxicity using high sensitivity toxicological endpoints,and subsequently investigated the performance of some of the water treatment strategies in modulating the water ***,we implemented the toxicity concept into existing water treatment design theory to facilitate toxicity-oriented water quality control *** for the next steps are also *** hope our work will intrigue water quality scientists and engineers to improve and embrace the mixture water pollutant and toxicological evaluation and engineering control.

关键词： Water Wastewater Mixture Toxicity Monitor Control

Ordovician chitinozoan diversification events in China

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Science China Earth Sciences 2004年第10期47卷 874-879页

作者： WANG Xiaofeng chen xiaohong Center for Stratigraphy and Palaeontology CGS Yichang 443003 China Center for Stratigraphy and Palaeontology CGS Yichang 443003 China

Correlative study of the Ordovician chitinozoan biostratigraphy in China with grap- tolite and conodont biozones, and comprehensive analysis of the sequence- and event-strati- graphic indicated that 17 chitinozoan zones and 5 main chitinozoan diversification events subsequently occurring could be recognized in the Ordovician System of China. The 5 events comprise: event 1 — appearance of the earliest Ordovician chitinozoans, event 2 —appearance of C. symmetrica, event 3 —juvenile radiation of chitinozoans, event 4 —appearance of chitinozoans with high diversity, and event 5 —development of chitinozoans of deep-water facies. The age and feature of each event and its relation with the sea-level change and other geological event are discussed.

关键词： chitinozoan, Ordovician, diversification event.

Osteology of Quasipaa robertingeri(Anura:Dicroglossidae)

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Asian Herpetological Research 2016年第4期7卷 242-250页

作者： Meihua ZHANG Xiaoping chen xiaohong chen Department of Zoology College of Life SciencesHenan Normal University School of Science and Technology Jiaozuo Teachers College

The objectives of this study are to present a detailed and comprehensive description of the osteology of Quasipaa robertingeri （Anura： Dicroglossidae）, to provide osteological evidence for taxonomy, and to explore the adaptive traits of Q. robertingeri. We comprehensively studied the osteology of 2 adult specimens （1 male 98A00351 and 1 female 98A0041） of Q. robertingeri using conventional methods. Our osteological examination of Q. robertingeri shows that 1） the nasals are large and connect with one another medially; 2） the sphenethmoid is completely covered by the nasals and the frontopatietals, and thus it is not exposed dorsally; 3） the vomerine teeth are well-developed; 4） the anterior parts of the diapophyses＇ of the presacral II protrude forward in the male, the same observation was made in the presacrals II and III in the female; 5） the pectoral girdle is firmisternal; 6） the omosternum is fan-shaped posteriorly, and almost equal to the length of the mesosternum; 7） the xiphistemum is W-shaped with a deep incision posteriorly; 8） the humerus of the male is more developed in the crista ventralis, the crista medialis, and the crista lateralis; 9） the metacarpal II of the male presents with a nuptial tuber; and 10） the distal phalanges of the digits are anchorshaped. Ultimately, the unique characteristics listed are most likely adaptations to the environment and amplexus of Q. robertingeri.

关键词： Quasipaa robertingeri osteological characteristics sexual dimorphism environment adaptation

FUZZY DECISION MAKING FOR SELECTION OF INFORMATION SYSTEM DEVELOPMENT APPROACH

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中国有色金属学会会刊：英文版 1998年第1期8卷 173-177页

作者： chen, xiaohong Liu, Mai Takahara, Yasuhiko Central South Univ of Technology Changsha China

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ＦＵＺＺＹＤＥＣＩＳＩＯＮＭＡＫＩＮＧＦＯＲＳＥＬＥＣＴＩＯＮＯＦＩＮＦＯＲＭＡＴＩＯＮＳＹＳＴＥＭＤＥＶＥＬＯＰＭＥＮＴＡＰＰＲＯＡＣＨ①ＣｈｅｎＸｉａｏｈｏｎｇａｎｄＬｉｕＭａｉＣｏｌｅｇｅｏｆＢｕｓｉｎｅｓａｎｄＭａｎａｇｅｍｅｎｔ，Ｃｅｎｔｒ...

关键词： ISDA fuzzy decision making fuzzy synthetic descrimination model

Micro-arc Oxidation Inverter Power Supply Based on the Limited Bipolar Soft-switch Control Method

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Chinese Journal of Mechanical Engineering 2009年第3期22卷 390-394页

作者： ZENG Min chen xiaohong CAO Biao School of Mechanical and Automotive Engineering South China University of Technology Guangzhou 510640 China

In order to overcome many limitations of the conventional power supplies, such as ponderosity, big wastage, and simplex output characteristic, a dual-inverter power supply is designed to meet the different requirements of micro-arc oxidation. The main circuit structure and principle of the dual-inverter power supply for micro-arc oxidation is described, the control system and the control adjustment method are also introduced. The dual-inverter technology is adopted in micro-arc oxidation power supply. The limited bipolar control mode is applied in the power inverter circuit for adjusting the voltage, and various voltage waveform can be obtained by controlling the chopper circuit. Meanwhile, the control accuracy and response speed are improved greatly because of the higher inverter frequency. The power supply can output direct current（DC） waveform, DC pulse waveform, symmetry alternating current（AC） waveform, asymmetry AC waveform, and so on. Besides, the parameters such as pulse width, range, frequency, duty cycle can be adjusted. The experimental result shows that the power supply has many advantages, such as stable output, wonderful waveform consistency and obvious advantage in technique, and it can meet the requirements of micro-arc oxidation process fully.

关键词： micro-arc oxidation power supply inverter chopper limited bipolar

Improving the understanding of the influencing factors on sea level based on wavelet coherence and partial wavelet coherence

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Journal of Oceanology and Limnology 2023年第5期41卷 1643-1659页

作者： Chao SONG xiaohong chen Wenjun XIA School of Civil Engineering Sun Yat-sen UniversityGuangzhou 510275China Guangdong Engineering Technology Research Center of Water Security Regulation and Control for Southern China Sun Yat sen UniversityGuangzhou 510275China Key Laboratory of Water Cycle and Water Security in Southern China of Guangdong High Education Institute Sun Yat-sen UniversityGuangzhou 510275China

Relationship between sea level change and a single climate indicator has been widely ***,few studies focused on the relationship between monthly mean sea level(MMSL)and several key impact factors,including CO_(2) concentration,sea ice area,and sunspots,on various time *** addition,research on the independent relationship between climate factors and sea level on various time scales is lacking,especially when the dependence of climate factors on Nino 3.4 is *** on this,we use wavelet coherence(WC)and partial wavelet coherence(PWC)to establish a relationship between MMSL and its influencing *** WC results show that the influence of climate indices on MMSL has strong regional *** significant correlation between Southern Hemisphere sea ice area and MMSL is opposite to that between Northern Hemisphere sea ice area and *** PWC results show that after removing the influence of Nino 3.4,the significant coherent regions of the Pacific Decadal Oscillation(PDO),Dipole Mode Index(DMI),Atlantic Multidecadal Oscillation(AMO),and Southern Oscillation Index(SOI)decrease to varying degrees on different time scales in different regions,demonstrating the influence of Nino *** work emphasizes the interrelationship and independent relationship between MMSL and its influencing factors on various time scales and the use of PWC and WC to describe this *** study has an important reference significance for selecting the best predictors of sea level change or climate systems.

关键词： wavelet coherence partial wavelet coherence monthly mean sea level influencing factors time scale significant correlation

Biota and Organic Matter in the Late Sinian and EarlyCambrian Black Rock Series of West Hunan andIts Significance for Metallization

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Acta Geologica Sinica(English Edition) 1998年第4期72卷 432-440页

作者： chen xiaohong WANG Xiaofeng Yichang Institute of Geology and Mineral Resources CAGS37 Gangyao Rd.YichangHubei 443003

Abstract: A great amount of black rock series has been found in the Upper Sinian Members 2 and 4 of the Jinjiadong Formation, middle-upper Liuchapo Formation and the Lower Cambrian Xiaoyanxi Formation in West Hunan, which is associated with periodic sea-level changes. By the studies of relationships between the distribution and development of the biota and the abundance of Au, Ag, U, V, Ni, Mo and Cu in the Upper Sinian and Early Cambrian black rock series in Cili, Dayong, Yuanling, Xupu and Qianyang of West Hunan, central China, it has been revealed that the enrichment of Ag, V, and Mo is related with the development of multi-cell plants and vendotaenides, and that of Cu and Ni is related to flourishing of bacteria and shelly fossils. The black rock series in the study area contains abundant organic matter, among which the siliceous shale contains the highest TOC, amounting to 4.51–13.4%. All the values of the equivalent vitrinite reflectance (medium values) determinated with the IR-spectroscopic method in the area are over 2.65%, indicating that the organic evolution was at an overmature stage. Due to the effect of enhancement of organic maturation by hydrothermal fluids, the Upper Sinian and Lower Cambrian had a reverse organic maturity profile in most areas of West Hunan. The enrichment of Ag, V, Ni, Mo and U is a result of organic absorption, and that of Au might be attributed to the migration by hydrothermal fluids.

关键词： black rock series biota and organic matter metallization Late Sinian-Early Cambrian West Hunan

A primal perspective for indefinite kernel SVM problem

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Frontiers of Computer Science 2020年第2期14卷 349-363页

作者： Hui XUE Haiming XU xiaohong chen Yunyun WANG School of Computer Science and Engineering Southeast UniversityNanjing 210096China Key Laboratory of Computer Network and Information Integration(Southeast University) MOENanjing 210096China College of Science Nanjing University of Aeronautics and AstronauticsNanjing 210016China School of Computer Science Nanjing University of Posts and TelecommunicationsNanjing 210046China

Indefinite kernel support vector machine(IKSVM)has recently attracted increasing attentions in machine *** IKSVM essentially is a non-convex problem,existing algorithms either change the spectrum of indefinite kernel directly but risking losing some valuable information or solve the dual form of IKSVM whereas suffering from a dual gap *** this paper,we propose a primal perspective for solving the *** is,we directly focus on the primal form of IKSVM and present a novel algorithm termed as IKSVM-DC for binary and multi-class ***,according to the characteristics of the spectrum for the indefinite kernel matrix,IKSVM-DC decomposes the primal function into the subtraction of two convex functions as a difference of convex functions(DC)*** accelerate convergence rate,IKSVM-DC combines the classical DC algorithm with a line search step along the descent direction at each ***,we construct a multi-class IKSVM model which can classify multiple classes in a unified form.A theoretical analysis is then presented to validate that IKSVM-DC can converge to a local ***,we conduct experiments on both binary and multi-class datasets and the experimental results show that IKSVM-DC is superior to other state-of-the-art IKSVM algorithms.

关键词： indefinite kernel support vector machine multi-class classification non-convex optimization

Design and Control of an Autonomous Bat-like Perching UAV

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Journal of Bionic Engineering 2024年第3期21卷 1253-1264页

作者： Long Bai Wei Wang xiaohong chen Yuanxi Sun State Key Laboratory of Mechanical Transmission Chongqing UniversityChongqing400044China

Perching allows small Unmanned Aerial Vehicles(UAVs)to maintain their altitude while significantly extending their flight duration and reducing ***,current research on flying habitats is poorly adapted to unstructured environments,and lacks autonomous capabilities,requiring ideal experimental environments and remote control by *** solve these problems,in this paper,we propose a bat-like UAV perching mechanism by investigating the bat upside-down perching method,which realizes double self-locking in the perching state using the ratchet and four-link dead point *** on this perching mechanism,this study proposes a control strategy for UAVs to track targets and accomplish flight perching autonomously by combining a binocular camera,single-point LiDAR,and pressure *** perching experiments were conducted for crossbar-type objects *** experimental results show that a multirotor UAV equipped with the perching mechanism and sensors can reliably achieve autonomous flight perching and re-flying off the target *** power consumption is reduced to 2.9%of the hovering state when perched on the target object.

关键词： Bio-inspired design Perching mechanism UAV Autonomous flight