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Topological Approach to the Study of Global Stationary Property of Quantum Systems

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Chinese Physics Letters 1999年第2期16卷 82-84页

作者： XU Gong-ou xing Yong-zhong YANG Ya-tian Department of Physics Nanjing UniversityNanjing 210093 Department of Physics fujian Normal Universityfuzhou 350007

A topological approach to the study of global stationary property of quantum systems is carefully *** attentions are paid to basic notions such as homeomorphic map,topological-structure-preserving(TSP)map,and bifurcat... 详细信息

关键词： topological Stationary bifurcation

General Character of Quantum Regular Motion and Quantum-Classical Correspondence

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Chinese Physics Letters 1999年第5期16卷 318-320页

作者： XU Gong-ou YANG Ya-tian xing Yong-zhong Department of Physics Nanjing UniversityNanjing 210093 Department of Physics Fujian Normal UniversityFuzhou 350007

In order to have a complete description of the spatio-temporal evolution of a quantum state,the initial state should be properly specified as the coherent state corresponding to a definite dynamical *** we have qualitatively different situations where the initial coherent state evolves under the action of a system having or not having the same dynamical *** the former case,we have regular motion with the general character which tends to that of the corresponding classical case in the limit n→*** in the latter case,we may have energy regions of global stochasticity with characters closely related to the initial dynamical symmetry strongly violated.

关键词： dynamical coherent Regular

Formation mechanism of surface oxide layer of grain-oriented silicon steel

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Journal of Iron and Steel Research International 2021年第3期28卷 327-334页

作者： Jia-long Qiao Fei-hu Guo Sheng-tao Qiu xing-zhong Zhang Hai-jun Wang National Engineering Research Center of Continuous Casting Technology China Iron&Steel Research Institute GroupBeijing100081China School of Metallurgy and Resources Anhui University of TechnologyMa’anshan243002AnhuiChina

The surface oxide layer of grain-oriented electrical steels was investigated by scanning electron *** formation mechanism and the influence on the glass film of the surface oxide layer were analyzed by the calculation of thermodynamics and *** surface oxide layer with 2.3μm in thickness is mainly composed of SiO_(2),a small amount of FeO and Fe_(2)SiO_(4).During the formation of surface oxide layer,the restriction factor was the diffusion of O in the oxide *** the initial stage of the decarburization annealing,FeO would be formed on the surface ***_(2) and silicate particles rapidly nucleated,grew and formed a granular oxide layer in the *** the oxidation layer thickens,the nucleation of new particles decreases,and the growth of oxide particles would be dominant.A lamellar oxide layer was formed between the surface oxide layer and the steel matrix,and eventually formed a typical three-layer *** the high temperature annealing,MgO mainly reacted with SiO_(2) and Fe_(2)SiO_(4) in the surface oxide layer to form Mg2SiO_(4) and Fe_(2)SiO_(4) would respond first,thus forming the glass film with average thickness of 4.87μm.

关键词： Grain-oriented silicon steel Decarburizing annealing Surface oxide layer Formation mechanism Glass film

Evolution of the Rust Layers Formed on Carbon and Weathering Steels in Environment Containing Chloride Ions

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Acta Metallurgica Sinica(English Letters) 2016年第11期29卷 1025-1036页

作者： Xin-Liang Gao Yi Han Gui-Qin Fu Miao-Yong Zhu xing-zhong Zhang National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan University School of Metallurgy Northeastern University

To clarify the correlation between alloy elements and growth pattern of the rust layers, the rusting evolution of the carbon and weathering steels was investigated by using the gold markers method. The corrosion experiments were carried out in a simulated environment containing chloride ions. The results indicate that Ni, Cu, Cr and Mo elements in the weathering steel suppress the rust crystallization and impede the rust layer growth to an internal development, and the suppression function benefits the formation of a protective rust layer. Moreover, c-FeOOH is mainly located in the outer rust layer, while b-FeOOH is mainly located in the inner rust layer, and the distribution of the rust compounds in the rust layer is closely related to the growth pattern of the rust layer.

关键词： Atmospheric corrosion Steel Rust layer SEM Chloride ions

Effects of Population Size on Reproductive Success of the Endangered and Endemic Species Primula merrilliana

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Journal of Integrative Plant Biology 2008年第9期50卷 1151-1160页

作者： Jian-Wen Shao Xiao-Ping Zhang zhong-xing Zhang Guo-Ping Zhu College of Life Science Anhui Normal University Wuhu 241000 China The Key Laboratory of Biotic Environment and Ecological Safety in Anhui Province Anhui Normal University Wuhu 241000 China The Key Laboratory of Molecular Evolution and Biodiversity Anhui Normal University Wuhu 241000 China

The reproductive ability related to the population size of the endangered and endemic species Primula merrilliana Schltr. was investigated. In 26 populations observed, only four contain more than 500 flowering individuals, whereas most of them （53.8%） consist of less than 100 flowering individuals. Though the ratio of pin and thrum plants keeps its balance at 1：1 for all populations, the frequency of pin and thrum flowers was significantly biased in most small populations. Population size strongly affected reproductive success; plants in small populations produced significantly fewer flowers and fruits per plant and fewer seeds per fruit, and therefore fewer seeds per plant. The floral density was another important factor that influenced the reproductive success of P. merrilliana, because four main reproductive success parameters （fruits per plant, seeds per fruit, seeds per plant, and the proportion of flowers setting fruit） were all positively correlated with floral density. The size of plants and the number of leaves per plant （measure of habitat quality） were not influenced by the variation of population size, suggesting that the reduced fecundity in small populations may not be a consequence of lower habitat quality. Inbreeding depression and pollen limitation as a result of less attractiveness in small populations are therefore likely explanations for these patterns.

关键词： fruits and seeds-set heterostyly population size Primula merrilliana short-lived plant

Industrial Research on Broadening of Slab in Continuous Casting Process

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Journal of Iron and Steel Research International 2010年第8期17卷 20-24页

作者： FU Jian-xun LI Jing-she ZHANG Hui ZHANG xing-zhong School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China Machinery and Electric Department University of JiaozuoJiaozuo 454000HenanChina National Engineering Research Center of Continuous Casting Technology Central Iron and Steel ResearchInstituteBeijing 100081China

In order to check the general existence of broadening of slab and the reasons of formation,the broadening of slab was investigated on the basis of several industrial manufactures of continuous *** results show that slab broadening commonly exists in the process of continuous *** causes of broadening were ruled out of the consideration of the change of mold size or the change of technical *** results reveal that the broadening of slab probably results from the static pressure of molten steel and the force from driving *** the same time,online observations of three grades of steel in the process of continuous casting reveal that the ratio of ultimate broadening of slab ranges from 1.27% to 3.00%,and even arrives at 4.4%.

关键词： continuous casting slab broadening industrial investigation

One-step strategy to graphene/Ni（OH）2 composite hy- drogels as advanced three-dimensional supercapacitor electrode materials

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Nano Research 2013年第1期6卷 65-76页

作者： Yuxi Xu Xiaoqing Huang Zhaoyang Lin xing zhong Yu Huang Xiangfeng Duan Department of Chemistry and Biochemistry University of California Los Angeles California 90095 USA Department of Materials Science and Engineering University of California Los Angeles California 90095 USA California Nanosystems Institute University of California Los Angeles California 90095 USA

Graphene-based three-dimensional （3D） macroscopic materials have recently attracted increasing interest by virtue of their exciting potential in electrochemical energy conversion and storage. Here we report a facile one-step strategy to prepare mechanically strong and electrically conductive graphene/Ni（OH）2 composite hydrogels with an interconnected porous network. The composite hydrogels were directly used as 3D supercapacitor electrode materials without adding any other binder or conductive additives. An optimized composite hydrogel containing -82 wt.% Ni（OH）2 exhibited a specific capacitance of -1,247 F/g at a scan rate of 5 mV/s and -785 F/g at 40 mV/s （-63% capacitance retention） with excellent cycling stability. The capacity of the 3D hydrogels greatly surpasses that of a physical mixture of graphene sheets and Ni（OH）2 nanoplates （-309 F/g at 40 mV/s）. The same strategy was also applied to fabricate graphene-carbon nanotube/Ni（OH）2 ternary composite hydrogels with further improved specific capacitances （-1,352 F/g at 5 mV/s） and rate capability （-66% capacitance retention at 40 mV/s）. Both composite hydrogels obtained here can deliver high energy densities （-43 and -47 Wh/kg, respectively） and power densities （-8 and -9 kW/kg, respectively）, making them attractive electrode materials for supercapacitor applications. This study opens a new pathway to the design and fabrication of functional 3D graphene composite materials, and can significantly impact broad areas including energy storage and beyond.

关键词： graphene Ni(OH)2 hydrogel three-dimensional supercapacitor energy storage

The diurnal flight activity and influential factors of Frankliniella occidentalis in the greenhouse

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Insect Science 2010年第6期17卷 535-541页

作者： xing-Hui Liang zhong-Ren Lei Jin-Zeng Wen Ming-Liang Zhu State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of Agricultural Sciences Beijing China

The daily flight activity of westem flower thrips, Frankliniella occidentalis （Pergande）（Thysanoptera： Thripidae） was examined using color, yellow-light and chemical attractant traps in a cucumber greenhouse and under controlled laboratory conditions. In the greenhouse, flying thrips were most abundant between hours 08：00-10：00, declined at mid-day, and then slightly increased during hours 14：00-16：00; however they decreased to a very low level at 18：00. The use of light traps showed no thrip flight activity during the night. The total number of thrips that flew onto cards on rainy or cloudy days was higher than that on sunny days. We reconfirmed that traps treated with attractant attracted 4.0-9.4 times more thrip than the untreated traps. Under laboratory controlled conditions, thrip flight activity was highest under light intensity between 4 000 and 6 000 lux, air temperature of 28℃, and RH of 70%. In addition, starved thrips flew more readily than non-starved thrips.

关键词： attractant daily flight activity Frankliniella occidentalis factors traps

Correlation of normal neutrino mass ordering with upper octant of θ_(23) and third quadrant of δ via RGE-induced μ-τ symmetry breaking

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Chinese Physics C 2018年第12期42卷 66-77页

作者： Guo-yuan nuang Zhi-zhong xing Jing-yn Zhu Institute of High Energy Physics and School of Physical SciencesUniversity of Chinese Academy of SciencesBeijing 100049China Center for High Energy Physics Peking UniversityBeijing 100080China

The recent global analysis of three-flavor neutrino oscillation data indicates that the normal neutrino mass ordering is favored over the inverted one at the 3σ level, and the best-fit values of the largest neutrino mixing angle 023 and the Dirac CP-violating phase δ are located in the higher octant and third quadrant, respectively. We show that all these important issues can be naturally explained by the μ-τ reflection symmetry breaking of massive neutrinos from a superhigh energy scale down to the electroweak scale owing to the one-loop renormalization-group equations （RGEs） in the minimal supersymmetric standard model （MSSM）. The complete parameter space is explored for the first time in both the Majorana and Dirac cases, by allowing the smallest neutrino mass m1 and the MSSM parameter tanβ to vary within their reasonable regions.

关键词： renormalization group equations μ-τ - reflection symmetry lepton flavor mixing