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A decision hyper plane heuristic based artificial immune network classification algorithm

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Journal of Central South University 2013年第7期20卷 1852-1860页

作者： DENG Ze-lin TAN Guan-zheng HE pei YE Ji-xiang School of Information Science and Engineering Central South University Changsha 410083 China School of Computer and Communication Engineering Changsha University of Science and Technology Changsha 410076 China

Most of the developed immune based classifiers generate antibodies randomly, which has negative effect on the classification performance. In order to guide the antibody generation effectively, a decision hyper plane heuristic based artificial immune network classification algorithm （DHPA1NC） is proposed. DHPAINC taboos the inner regions of the class domain, thus, the antibody generation is limited near the class domain boundary. Then, the antibodies are evaluated by their recognition abilities, and the antibodies of low recognition abilities are removed to avoid over-fitting. Finally, the high quality antibodies tend to be stable in the immune network. The algorithm was applied to two simulated datasets classification, and the results show that the decision hyper planes determined by the antibodies fit the class domain boundaries well. Moreover, the algorithm was applied to UCI datasets classification and emotional speech recognition, and the results show that the algorithm has good performance, which means that DHPAINC is a promising classifier.

关键词： artificial immune network decision hyper plane recognition ability classification

Control of hepatitis B virus replication by interferons and Toll-like receptor signaling pathways

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World Journal of Gastroenterology 2014年第33期20卷 11618-11629页

作者： Rong-Juan pei Xin-Wen Chen Meng-Ji Lu Wuhan Institute of Virology Chinese Academy of Sciences Institute of Virology University Hospital of Essen 45122 Essen Germany

Hepatitis B virus (HBV) infection is one of the major causes of liver diseases, affecting more than 350 million people worldwide. The interferon (IFN)-mediated innate immune responses could restrict HBV replication at the different steps of viral life cycle. Indeed, IFN-α has been successfully used for treatment of patients with chronic hepatitis B. However, the role of the innate immune response in HBV replication and the mechanism of the anti-HBV effect of IFN-α are not completely explored. In this review, we summarized the currently available knowledge about the IFN-mediated anti-HBV effect in the HBV life cycle and the possible effectors downstream the IFN signaling pathway. The antiviral effect of Toll-like receptors (TLRs) in HBV replication is briefly discussed. The strategies exploited by HBV to evade the IFN- and TLR-mediated antiviral actions are summarized.

关键词： Hepatitis B virus Interferon Toll-like receptor Interferon stimulated genes Innate immune response

The Effect of Dietary Supplementation with Phytase Transgenic Corn on Growth Performance,Phosphorus Utilization and Excretion in Growing Pigs (Sus scrofa)

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Agricultural Sciences in China 2011年第5期10卷 769-776页

作者： WANG Xiu-qi WANG Sheng ZHANG Jun-min YANG Jing-pei Guandong Provincial Key Laboratory ofAgro-Animal Genomics and Molecular Breeding＇/College of Animal Science South China Agricultural University Guangzhou 510642 P.R. China State Key Laboratory of Animal Nutrition Institute of Animal Science Chinese Academy of Agricultural Sciences Beijing 100193 P.R. China

Two experiments were conducted to investigate the effect of dietary supplementation with phytase transgenic corn （PTC） on growth performance,phosphorus （P） utilization and excretion in growing *** Exp.1,180 pigs （Large White × Landrace,BW=37.7 kg） were randomly allotted to 4 treatments with 5 replicates of 9 pigs each in order to evaluate the effect of PTC supplementation in low-P diets on growth *** corn soybean meal-based diets consisted of a positive control （PC） diet,a diet containing 500 units （U） of exogenous phytase kg-1 （EP） on the basis of low-P （inorganic P reduced by 0.05% from PC diet） and the low-P＋500 （PTC1） or 750 （PTC2） phytase U of PTC *** Exp.2,20 barrows （Large White×Landrace,BW=31 kg,4 treatments with 5 replicates of 1 pig each） were randomly selected to evaluate the effect of PTC in low-P diets on serum parameters and nutrient *** in Exp.2 were similar to those in Exp.1 except that the EP group was replaced by a low-P diet without exogenous phytase supplementation as a negative control （NC） *** results from Exp.1 showed that the average daily gain （ADG） in the PTC2 group was significantly higher （P〈0.05） than that in the EP group over all *** the other hand,the feed：gain （F：G） ratio of the EP group was significantly higher （P〈0.05） than that of the PTC2 group during 1-21 and 1-42 d,*** were no differences in average daily feed intake （ADFI） among all treatments （P〉0.05）.The results from Exp.2 showed that the concentration of serum Ca in the NC group was the highest （P〈0.05）,while the concentration of serum P in the PTC2 group was the highest （P〈0.05） among all *** was a significant decrease （P〈0.05） in the P apparent digestibility of the NC group compared with the other groups,and that of PTC2 group was the ***,fecal P excretion was reduced （P〈0.05） from 1.80 g d-1 in the PC group to 1.28 g d-1 in the PTC2 *** conclusion,dietary supplementation with PTC

关键词： phytase transgenic corn growth performance nutrient apparent digestibility phosphorus excretion growing pigs

Quantitative Trait Loci for Resistance Against Fusarium Wilt Based on Three Cotton F_2 Populations

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Agricultural Sciences in China 2010年第12期9卷 1799-1806页

作者： WANG pei-zheng SHI Li-fang SU Li HU Bao-min Xinjiang Condy Seed Science ＆ Technology Development Co. Ltd Urumqi 830011 P.R.China

Fusarium wilt （FW） is one of the most common cotton diseases in the world. Identification of QTLs conferring resistance to FW is key for the incorporation of resistance genes into elite cultivars. Two intraspecific （cross between Gossypium hirsuturn L.） and one interspecific （cross between Gossypium hirsutum L. and Gossypium bardence L.） F2 populations were constructed by using a highly resistant cultivar and crossing it to a susceptible cultivar with 154, 79, and 148 offsprings, respectively. Simple sequence repeats （SSR） were used to screen genomic regions closely linked to FW resistance. The results showed that five QTLs associated with FW resistance were detected in two intraspecific populations using a composite interval mapping method under four different conditions. Four of these loci located on Chr. 2/Chr. 17 neighboring markers JESPR304 or CIR305 which explained 13.1 to 45.9% of the phenotypic effect. Furthermore, JESPR304 and CIR305 were previously testified and found to be tightly linked. It is possible that these four QTLs detected under different conditions were the same resistance QTL/gene. We consider that there is the possibility of a major FW resistant gene in intraspecific populations. In the interspecific mapping populations two QTLs were detected on Chr. 9 and Chr. 12/26 which explained great phenotypic variance of 49.4 and 45.7%. As the location of QTLs for FW resistance among the intraspecific and the interspecfic populations were totally different, it is suggested that there may be different resistance mechanisms between G. bardence L. and G. hursutum L. Thus, the present research provides an opportunity to understand the genetic control of resistance to FW in Gossypium hirsutum and Gossypium bardence and to conduct MAS in breeding programs to develop FW resistant cultivars.

关键词： cotton Fusarium wilt resistance QTL molecular mapping

Field-Line-Circuit Coupling Based Method for Predicting Radiated Electromagnetic Emission of IGBT-PMSM Drive System

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Chinese Journal of Electronics 2021年第3期30卷 561-569页

作者： XIAO pei HE Jiagang PENG Zishun LI Jiawei QIU Yongfeng LIU Zhu LI Gaosheng College of Electrical and Information Engineering Hunan University School of Mechanical and Electrical Engineering University of Electronic Science and Technology of China

Electric drive system with Insulated gate bipolar transistor(IGBT) power device is widely used in Electric vehicle(EV), which consists of inverter, cables and Permanent magnet synchronous motor(PMSM). Due to the fast switching in di/dt and dv/dt of IGBT device,the system produces serious radiated Electromagnetic interference(EMI) through the interconnection ***, modeling of EMI source, propagation path and load PMSM is the key to accurately evaluate the system’s radiation level. In addition, the system’s radiated EMI involves the integrated calculation of circuit, cable and electromagnetic field, which cannot be solved by using a single circuit or electromagnetic calculation method. Therefore, this paper develops an effective fieldlinecircuit coupling based method to investigate the radiated EMI problems for IGBT-PMSM drive system,which is validated by experimental measurement. Besides,the impact of power cable parameters on radiated EMI is discussed. The proposed approach has guiding significance for electromagnetic compatibility design of EV.

关键词： Electromagnetic compatibility and interference Synchronous machines Control of electric power systems Drives Radiated EMI Cables IGBT-PMSM drive system Field-line-circuit coupling

Research on cultural algorithm for solving routing problem of mobile agent

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The Journal of China Universities of Posts and Telecommunications 2008年第4期15卷 121-125页

作者： MA Jun ZHANG Jian-pei YANG Jing CHENG Li-li College of Computer Science and Technology Harbin Engineering University Harbin 150001 China

The key idea behind cultural algorithm is to explicitly acquire problem-solving knowledge from the evolving population and in return apply that knowledge to guide the search. In this article, cultural algorithm-simulated annealing is proposed to solve the routing problem of mobile agent. The optimal individual is accepted to improve the belief space＇s evolution of cultural algorithms by simulated annealing. The step size in search is used as situational knowledge to guide the search of optimal solution in the population space. Because of this feature, the search time is reduced. Experimental results show that the algorithm proposed in this article can ensure the quality of optimal solutions, and also has better convergence speed. The operation efficiency of the system is considerably improved.

关键词： cultural algorithm mobile agent routing simulated annealing

Direct imaging of stress-induced magnetic behavior transitions

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Journal of Materials Science & Technology 2023年第15期146卷 72-79页

作者： Wenbin You Gangjie Lian Liting Yang Ke pei Yuyang Wu Jincang Zhang Renchao Che Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsDepartment of Materials ScienceFudan UniversityShanghai 200438China Zhejiang Laboratory Hangzhou 311100China Materials Genome Institute Shanghai UniversityShanghai 200444China

Stress induction plays a special role in performance control for material *** far,it has remained challenging to systematically investigate magnetoelectric effect under stress-mediated *** we constructed a magnetoelectric device with piezoelectric stress induction,in which the stress plays a crucial intermediate role during the controllable modification of the magnetic behavior transitions under the magnetic field or current pulse driven *** compressive stress was found to make the above process easier and reduce energy consumption via changing the magnetic domain energy ***,both the domain distribution and domain-wall driven process are sensitive to stress *** magnetoelectric device integrated the advantages of voltage-stress and spin-current for the control of magnetic behavior transition with the help of micro-nano *** the stress-induced magnetic behavior in magnetic materials was directly imaged and quantificationally investigated,the complex interactions between stress,magnetic domain motion,magnetic field,and spin current have been clarified.

关键词： Magnetic behavior Voltage-stress:spin-current Energy consumption

Effect of Phosphor Addition on Intergranular Exchange Coupling of Co-Pt Thin Films

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Journal of Materials Science & Technology 2011年第5期27卷 398-402页

作者： Bo Yang Gaowu Qin Wenli pei Song Li Yuping Ren Shunji Ishio Key Laboratory for Anisotropy & Texture of Materials Northeastern University Shenyang 110004 China Department of Material Science & Engineering Akita University Akita 0108502 Japan

In this paper, ternary Co-Pt-P thin films were prepared by Co-P chips pasted on the cobalt target. The structure magnetron sputtering with platinum and home-made and magnetic properties were investigated by X-ray diffraction （XRD） and vibrating sample magnetometer （VSM）, respectively. With increasing phosphor content, the coercivities of Co-12 at.% Pt-P films increase from 1034 to 1525 Oe owing to the exchange decoupling among magnetic grains. The decrease of inter-granular exchange coupling was confirmed by delta-M curve measurement and magnetic force microscopy （MFM）. Transmission electronic microscopy （TEM） with nano- beam composition analysis shows that phosphor segregated at cobalt-based grain boundaries is responsible for the exchange decoupling. It is thus suggested that the phosphor addition is effective to tune the exchange coupling of magnetic grains, particularly for perpendicular recording media.

关键词： Intergranular exchange coupling Co-Pt-P Delta-M Magnetic recording media

Ultrasonicwave-assisted tandem-reaction for synthesis of symmetrical vicinal diamines

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Chinese Chemical Letters 2007年第12期18卷 1469-1470页

作者： Gen Rong Qiang Xiang Mei Wu Qin Wang Wen pei College of Chemical Engineering and Materials Zhejiang University of Technology Hangzhou 310014 China

A practical synthesis of symmetrical vicinal diamines with broad chemistry scope is described. The key step is the ultrasonicwave promoted tandem-reaction, two-step reaction sequence combining Mannich double condensations with benzo- triazole, glyoxal and primary or secondary amines and reduction of the bis（benzotriazole）-adducts with sodium borohydride proceeded smoothly in tetrahydrofuran in high yield at room temperature.

关键词： Vicinal diamine Benzotriazole Glyoxal Mannich reaction Synthesis