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General Convex Integral Control

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International Journal of Automation and computing 2014年第5期11卷 565-570页

作者： Bai-Shun liu Xiang-Qian Luo jian-hui li Academy of Naval Submarine

In this paper, a fire-new general integral control, named general convex integral control, is proposed. It is derived by defining a nonlinear function set to form the integral control action and educe a new convex function gain integrator, introducing the partial derivative of Lyapunov function into the integrator and resorting to a general strategy to transform ordinary control into general integral control. By using Lyapunov method along with the LaSalle s invariance principle, the theorem to ensure regionally as well as semi-globally asymptotic stability is established only by some bounded information. Moreover, the lemma to ensure the integrator output to be bounded in the time domain is proposed. The highlight point of this integral control strategy is that the integral control action seems to be infinity, but it factually is finite in the time domain. Therefore, a simple and ingenious method to design the general integral control is founded. Simulation results showed that under the normal and perturbed cases, the optimum response in the whole control domain of interest can all be achieved by a set of control gains, even under the case that the payload is changed abruptly.

关键词： General integral control nonlinear integrator convex integrator nonlinear control output regulation

Influence of Extrusion Joint on Microstructural Evolution and Properties of Mg Alloy Sheet

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Acta Metallurgica Sinica(English Letters) 2016年第5期29卷 475-482页

作者： Qing-Shan Yang Zu-jian Yu Hu-Cheng Pan Qing-Wei Dai jian-hui li School of Metallurgy and Materials Engineering Chongqing University of Science and TechnologyChongqing 401331China Chongqing Academy of Science and Technology Chongqing 401123China Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) Northeastern UniversityShenyang 110819China

The mechanical behaviour of AZ31 magnesium alloy sheet with the extrusion joint （EJ） was evaluated. Extruded joint of AZ31 alloy sheets was obtained by the hot extrusion process. Tensile tests were carried out along the extrusion direction at room temperature, and both the non-uniform plastic deformation and the fracture behaviour were studied. It is found that the samples with EJ present significantly deteriorated mechanical properties compared with the EJ- free counterpart. Inhomogeneous rnicrostructure distribution around EJ zone brings in the uncoordinated deformation due to the high density of {1012} twins which were readily activated during plastic deformation.

关键词： Mg alloy Microstructure Twin Texture Extrusion joint

Conductive microsphere monolayers enabling highly conductive pressure-sensitive adhesive tapes for electromagnetic interference shielding

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Advances in Manufacturing 2023年第2期11卷 212-221页

作者： Xi Lu Jin-Ming He Ya-Dong Xu jian-Hong Wei jian-hui li Hao-hui Long You-Gen Hu Rong Sun Shenzhen Institute of Advanced Electronic Materials Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518055GuangdongPeople's Republic of China Huawei Device(Dongguan)Company Ltd. Dongguan523000GuangdongPeople's Republic of China

Conductive adhesive tape is one kind of electromagnetic interference(EMI)shielding materials for electronic ***,the inferior conductivity of the pressure-sensitive adhesive(PSA)layer results in serious electromagnetic leakage at the conjunctions between the conductive tapes and target *** conductive fillers is a traditional method for highly conductive adhesive ***,the content of conductive fillers is needed to reach the percolation threshold,which is usually as high as tens of ***-content fillers result in significant loss of adhesive property and high fabrication ***,we introduce a rational architecture of conductive microsphere monolayer(CMM)in the PSA *** CMM connects the top and bottom surfaces of the PSA layer and improves its conductivity in the ***,low contents of conductive microspheres(≤5%(mass fraction,w))can achieve the target of conductivity improvement,but not result in the serious loss of the adhesive ***,the strategy of CMMs can balance the tradeoff between the conductivity and the adhesive property of conductive PSA ***,we demonstrate the superior EMI shielding performance of as-made conductive adhesive tapes,indicating their potential applications as the advanced EMI shielding materials in the electronic packaging.

关键词： Microsphere monolayer Pressure-sensitive adhesive(PSA) Conductive tapes Electronic packaging Electromagnetic interference(EMI)shielding

Syntheses,Crystal Structures and Bioactivities of Two Novel Isatin Derivatives

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维普期刊数据库

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Chemical Research in Chinese Universities 2011年第4期27卷 595-598页

作者： SHANG jian-li li hui-dong SHANG Jun SONG Hai-bin li Zheng-ming WANG jian-guo State Key Laboratory of Elemento-Organic Chemistry Institute of Elemento-Organic Chemistry Nankai University Tianjin 300071 P. R. China

Two novel compounds 1-（4-fluorobenzyl）-4-chloro-（Z）-3-benzoylhydrazono-2-indolinone（1） and 1-（4-methoxybenzyl）-（Z）-3-benzoylhydrazono-2-indolinone（2） were synthesized and their crystal structures were determined by single-crystal X-ray *** 1（C22H15ClFN3O2） crystallized in the triclinic system,space group P1·with a=0.94198（19） nm,b=1.4339（3） nm,c=1.5018（3） nm,α=101.58（3）°,β=102.96（3）°,γ=102.73°,V=1.8602（6） nm3,Mr=407.82,Dc=1.456 g/cm3,μ=0.240 mm-1,F（000）=840,Z=4,R1=0.0442 and wR2=*** 2（C23H19N3O3） crystallized in the triclinic system,space group P1·with a=1.0022（2） nm,b=1.0192（2） nm,c=1.0461（2） nm,α=99.86（3）°,β=117.30（3）°,γ=94.13（3）°,V=0.9215（3） nm3,Mr=385.41,Dc=1.389 g/cm3,μ=0.094 mm-1,F（000）=404,Z=2,R1=0.0403 and wR2=*** preliminary herbicidal activities of the two compounds were also evaluated.

关键词： Acetohydroxy acid synthase(AHAS) Crystal structure Isatin derivative Herbicidal activity

Determination of risperidone in human plasma by HPLC-MS/MS and its application to a pharmacokinetic study in Chinese volunteers

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2008年第2期9卷 114-120页

作者： Ming-zhu HUANG jian-zhong SHENTU Jun-chun CHEN jian liU hui-li ZHOU Research Center of Clinical Pharmaceutical Science the First Affiliated Hospital School of Medicine Zhejiang University Hangzhou 310003 China

This study presents a rapid, specific and sensitive liquid chromatography/tandem mass spectrometry (LC-MS/MS) assay for determination of risperidone (RIS) in human serum using paroxetine as an internal standard (IS). An Alltima-C18 column (2.1 mm×100 mm, 3 μm) and a mobile phase consisting of 0.1% formic acid-acetonitrile (40:60, v/v) were used for separation. The analysis was performed by selected reaction monitoring (SRM) method, and the peak area of the m/z 411.3→191.1 transition for RIS was measured versus that of the m/z 330.1→192.1 transition for IS to generate the standard curves. The assay linearity of RIS was confirmed over the range 0.25～50.00 ng/ml and the limit of quantitation was 0.05 ng/ml. The linear range corresponds well with the serum concentrations of the analytes obtained in clinical pharmacokinetic studies. Intraday and interday relative standard deviations were 1.85%～9.09% and 1.56%～4.38%, respectively. The recovery of RIS from serum was in the range of 70.20%～84.50%. The method was successfully applied to investigate the bioequivalence between two kinds of tablets (test versus reference products) in 18 healthy male Chinese volunteers. The result suggests that two formulations are bioequivalent.

关键词： Risperidone High performance liquid chromatography-mass spectrometry (HPLC-MS) Pharmacokinetics

Formation Mechanism and Binding Energy for Regular Tetrahedral Structure of li4

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Communications in Theoretical Physics 2006年第5X期46卷 914-918页

作者： GOU Qing-Quan YANG jian-hui li Ping Institute of Atomic and Molecular Physics Sichuan University Chengdu 610065 China

The formation mechanism for the regular tetrahedral structure of li4 cluster is proposed. The curve of the total energy versus the separation R between the two nuclei has been calculated by using the method of Gou＇s modified arrangement channel quantum mechanics （MACQM）. The result shows that the curve has a minimal energy of-29.8279 a.u. at R = 14.50 ao. When R approaches infinity the total energy of four lithium atoms has the value of-29.7121 a.u. So the binding energy of li4 with respect to four lithium atoms is the difference of 0.1158 *** the above two energy values. Therefore the binding energy per atom for Lh is 0.020 a.u., or 0.7878 eV, which is greater than the binding energy per atom of 0.453 eV for li2, the binding energy per atom of 0.494 eV for lia and the binding energy per atom of 0.632 eV for li5 calculated previously by us. This means that the li4 cluster may be formed stably in a regular tetrahedral structure of side length R = 14.50 ao with a greater binding energy.

关键词： li4 cluster formation mechanism binding energy

Silencing of Bcl-2 gene expression by siRNA transfection in- hibits the protective effect of fluvastatin against cell apoptosis in human aortic endothelial cells

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Journal of Geriatric Cardiology 2008年第1期5卷 33-38页

作者： Wenwen Zhong Yang liu jian li hui Tian Department of Geriatric Endocrinology Chinese PLA General HospitalBeijing 100853China Department of Geriatric EndocrinologyChinese PLA General HospitalBeijing 100853China Department of Geriatric EndocrinologyChinese PLA General HospitalBeijing 100853China Department of Geriatric EndocrinologyChinese PLA General HospitalBeijing 100853China

Objective To study the protective effect of fluvastatin,one of the HMG-CoA reductase inhibitors (statins),against oxygen radical-induced oxidative damages in human aortic endothelial cell,and the role of Bcl-2 in this *** Human aortic endothelial cells with or without Bcl-2 siRNA transfection were subjected to 1-100 nM of fluvastatin and 100 la hydrogen peroxide for 24 ***-2 mRNA and protein expression were measured by Taqman quantitative PCR and Western *** apoptosis was measured by normal and fluorescent microscopy and Cell Death Detection *** In the Bcl-2-expressed cells,fluvastatin significantly reversed hydrogen peroxide-induced microscopic apoptosis and apoptotic DNA fragmentation,which were accompanied by a markedly upregulation of Bcl-2 expression by ***,the endothelial protection by fluvastatin was completely lost in Bcl-2 siRNA transfected *** Fluvastatin protects human endothelial cells against oxygen radical-induced cell apoptosis in vitro,and this protection seemed to be mediated in a Bcl-2 dependent pathway.(J Geriatr Cardil 12008;5:33-38)

关键词： fluvastatin,Bcl-2,gene silencing,apoptosis

Microstructure and microhardness of a novel TiZrAlV alloy by laser gas nitriding at different laser powers

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Rare Metals 2020年第3期39卷 270-278页

作者： Zhi-Hao Feng Xin-Yang Sun Peng-Biao Han Hang Fu hui-Cong Dong Shun Guo Ru Su jian-hui li Hebei Key Laboratory of Material Near-net Forming Technology Hebei University of Science and TechnologyShijiazhuang050000China Hebei Engineering Laboratory of Aviation lightweight Composite Materials and Processing Technology Hebei University of Science and TechnologyShijiazhuang050000China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao066004China School of Materials Science and Engineering Jiangsu UniversityZhenjiang212013China

The Ti-20Zr-6.5Al-4V(T20Z,wt%)alloy surface was treated by the process of laser surface *** evolution of microstructures and microhardness has been investigated by changing the laser power parameter from 120 to 240 *** laser-treated T20Z samples show two regions with distinctly different microstructural features,as compared with the untreated substrate:dense TiN dendrites and(α+β)-Ti(remelting zone,RMZ),nanoscaleαlaths doped with part of p phase(heat-affected zone,HAZ).The formation of TiN dendrites can be analyzed by a series of complex reactions during the process of melting and *** increase in laser power results in the increase in content of TiN dendrite which is mainly due to the increase in energy *** HAZ,the self-quenching effect leads to the formation of nanoscale a laths and the residue ofβ*** profile of different regions was measured from the surface to the interior,and the highest microhardness was obtained(~HV 916.8)in the RMZ,as the laser power was set to 240 *** the present study,we explained various microstructural characteristics induced by laser surface nitriding treatment.

关键词： TiZrAlV alloy Laser surface nitriding Microstructure TiN dendrites Microhardness

Multifractal methods for rapeseed nitrogen nutrition qualitative diagnosis modeling

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International Journal of Biomathematics 2016年第4期9卷 285-297页

作者： jian-hui li Fang Wang Jin-Wei li Rui-Biao Zou Gui-Ping liao Agricultural Information Institute Hunan Agricultural University Changsha 410128 P. R. China Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China Changsha 410128 P. R. China College of Science Hunan Agricultural University Changsha 410128 P. R. China

Nutrition diagnosis plays a key role in the crop＇s growth, which has mainly been car- ried out in the field by agricultural workers. Currently, automatic nutrition recognition technologies have been widely used in this field. A procedure is proposed in this paper to diagnose nitrogen nutrition non-destructively for rapeseed qualitatively based on the multifractal theory. Twelve texture parameters are given by the method of multifractal detrended fluctuation （MF-DFA）, which contains six generalized Hurst exponents and six relative multifractal parameters that are used as features of the rapeseed leaf images for identifying the two nitrogen levels, namely, the N-mezzo and the N-wane. For the base leaves, central leaves and top leaves of the rapeseed plant and the three-section mixed samples, three parameters combinations are selected to conduct the work. Five classifiers of Fisher＇s linear discriminant algorithm （LDA）, extreme learning machine （ELM）, support vector machine and kernel method （SVMKM）, random decision forests （RF） and K-nearest neighbor algorithm （KNN） are employed to calculate the diagno- sis accuracy. An interesting finding is that the best diagnose accuracy is from the base leaves of the rapeseed plant. It is explained that the base leaf is the most sensitive to the nitrogen deficiency. The diagnose effect by the base leaves samples is outshining the existing result significantly for the same leaves samples. For the mixed samples, the aver- aged discriminant accuracy reaches 97.12% and 97.56% by SVMKM and RF methods with the 10-fold cross-validation respectively. The resulting high accuracy on N-levels identification shows the feasibility and efficiency of our method.

关键词： Rapeseed leaf image nitrogen diagnosis multifractal detrended fluctuationanalysis classifiers.