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quantum to Classical Transition in a System of Two Coupled Kicked Rotors

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Communications in Theoretical Physics 2009年第3期51卷 465-469页

作者： ZHAO wen-Lei JIE quan-Lin Department of Physics Wuhan University Wuhan 430072 China

We investigate the quantum-classical transition in a system of two coupled kicked rotors. We lind that when the mass of one kicked rotor is much smaller than the other＇s, the influence of the light kicked rotor is still able to make decoherence of the heavy one. This leads to the quantum-classical transition of the heavy kicked rotor. We demonstrate this by two different coupling potentials.

关键词： quantum chaos quantum-classical transition entanglement kicked rotor

New Three-Mode Squeezing Operators Gained via Tripartite Entangled State Representation

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Communications in Theoretical Physics 2008年第1期49卷 225-228页

作者： jiang Nian-quan FAN Hong-Yi College of Physics and Electric Information Wenzhou University Wenzhou 325035 China Department of Material Science and Engineering University of Science and Technology of China Hefei 230026 China

We show that the Agarwal-Simon representation of single-mode squeezed states can be generalized to find new form of three-mode squeezed states. We use the tripartite entangled state representations ｜p, y, z） and ｜x... 详细信息

关键词： tripartite entangled state three-mode squeezing operator IWOP technique

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素养导向下高中语文关键能力测评的道法技

教学与管理 2025年第1期 58-62页

作者：王江锋赵伟闻天阳浙江师范大学教育学院浙江金华321004 聊城大学教育科学学院山东聊城252000

素养导向的高中语文关键能力测评旨在检测高中生语文学习之“道”“法”“技”的状况。然而,现实的高三语文复习教学却热衷于语文试题之“器”,执迷于答题模板、得分妙招之类的习得,热衷于机械记忆各种语文知识点,而忽视语文学习之“法... 详细信息

素养导向的高中语文关键能力测评旨在检测高中生语文学习之“道”“法”“技”的状况。然而,现实的高三语文复习教学却热衷于语文试题之“器”,执迷于答题模板、得分妙招之类的习得,热衷于机械记忆各种语文知识点,而忽视语文学习之“法”。其实,高中语文关键能力测评应以“融入知识迁移的建构主义”为道,以“基于学科能力的关键能力”为法,以“依托教育测量学理论”为技,避免崇器轻道、重器忽法、贵器怠术等不良现象。以道驭法,为迁移而教;以法固道,为问题解决而学;以技达道,为规律而研,最终实现“道法技器”四元合一。

关键词：素养导向高中语文关键能力测评道法技

Narrow Band Gap and Room-temperature Ferromagnetism in KNb1-xFexO3-δ

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Chinese Journal of Chemical Physics 2017年第1期30卷 97-102,I0002页

作者： Dan Nie jiang Zhang wen-ji Deng Xi Chen Zhong-quan Mao Ling-yun Tang Department of Physics South China University of Technology Guangzhou 510641 China

We have investigated the structure, optical and magnetic properties of ferroelectric KNb1-xFe2O3-δ （x=0, 0.01, 0.03, 0.05, 0.10, 0.15, 0.20, 0.25） synthesized by a traditional solid-state reaction method. According to the X-ray diffraction and the results of Rietveld refinement, all the samples maintain orthorhombic distorted perovskite structures with Amm2 space group without any secondary phase, suggesting the well incorporation of Fe ions into the KNbO3 matrix. With the increase of Fe concentration, the band gap of each sample is decreased gradually, which is much smaller than the 3.18 eV band gap of pure KNbO3. Through X-ray photoelectron spectrum analysis, the increased density of oxygen vacancy and Fe ions may be responsible for the observed decrease in band gap. Compared with the pure KNbO3, Fe doped samples exhibit room-temperature weak ferromagnetism. The ferromagnetism in KNb1-xFexO3-δ with low-concentration dopants （x=0.01-0.10） can be attributed to the bound magnetic polaron mediated exchange. The enhancement of magnetism for the high-concentration （x=0.10-0.20） doped samples may arise from the further increase of magnetic Fe ions.

关键词： KNbO3 Dope Optical property Magnetic property Bound magnetic polaron

Bio-inspired smart gating nanochannels based on polymer films

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Science China Chemistry 2011年第10期54卷 1537-1546页

作者： wen LiPing jiang Lei Center for Molecular Science Institute of Chemistry Chinese Academy of Sciences Beo'ing 100190 China

In this review we have summarized some recent results mainly reported by our group that focused on the development of smart gating nanochannels based on polymer films. These nanochannels were prepared using a track-etch process. The responsive materials/molecules and modification methods/techniques have also been demonstrated, from which we have obtained a series of smart gating nanochannels that can respond to single/dual external stimuli, e.g., pH, ion, temperature, light, and so on. These studies utilize responsive behaviors to regulate ionic transport properties inside a single nanochannel and demonstrate the fea-sibility of designing other smart nanodevices in the future.

关键词： bio-inspired smart gating stimuli-responsive nanochannel polymer films

Phonon relaxation and heat conduction in one-dimensional Fermi Pasta Ulam β lattices by molecular dynamics simulations

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Chinese Physics B 2012年第1期21卷 279-283页

作者： Hou quan-wen Cao Bing-Yang Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Engineering MechanicsTsinghua UniversityBeijing 100084China Key Laboratory of Space Applied Physics and Chemistry of Ministry of Education Department of Applied PhysicsNorthwestern Polytechnical UniversityXi’an 710072China

The phonon relaxation and heat conduction in one-dimensional Fermi Pasta-Ulam （FPU） β lattices are studied by using molecular dynamics simulations. The phonon relaxation rate, which dominates the length dependence of the FPU β lattice, is first calculated from the energy autoeorrelation function for different modes at various temperatures through equilibrium molecular dynamics simulations. We find that the relaxation rate as a function of wave number k is proportional to k^1.688, which leads to a N^0.41 divergence of the thermal conductivity in the framework of Green-Kubo relation. This is also in good agreement with the data obtained by non-equilibrium molecular dynamics simulations which estimate the length dependence exponent of the thermal conductivity as 0.415. Our results confirm the N^2/5 divergence in one-dimensional FPU β lattices. The effects of the heat flux on the thermal conductivity are also studied by imposing different temperature differences on the two ends of the lattices. We find that the thermal conductivity is insensitive to the heat flux under our simulation conditions. It implies that the linear response theory is applicable towards the heat conduction in one-dimensional FPU β lattices.

关键词： thermal conductivity phonon relaxation low-dimensional heat conduction FermiPasta Ulam (FPU) Key Laboratory of Space Applied Physics and Chemistry of Ministry of Education Department of Applied Physics Northwestern Polytechnical University Xi'an 710072 China lattice

Molecular cytogenetic study on the plants of Elymus nutans with varying fertility on the Qinghai-Tibet Plateau

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Plant Diversity 2022年第6期44卷 617-624页

作者： Bo Liu Xiao-Yan Tao quan-wen Dou Key Laboratory of Adaptation and Evolution of Plateau Biota Northwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina Qinghai Province Key Laboratory of Crop Molecular Breeding XiningChina University of Chinese Academy of Sciences BeijingChina

A molecular cytogenetic investigation was conducted on plants of the allohexaploid species Elymus nutans with varying fertility on the Qinghai-Tibet *** karyotyping revealed that chromosome variants were distributed unevenly among genomes and among different homologue chromosomes in each *** plants with varying fertility exhibited significantly higher numbers of chromosome variants than did the normal fertility samples,although both kinds of plants showed the same pattern of high-to-low polymorphism from the Y to St and H *** and karyotype heterozygosity in the plants with varying fertility were 3-and 13-fold higher than those in normal samples,*** negative correlations were found not only between seed setting rates and total genome heterozygosity but also between seed setting rates and heterozygosity of each genome in the plants of varying *** pairing analysis was performed using genomic in situ hybridization in selected plants of different fertility *** pairing of chromosomes at meiotic metaphase I was mostly bivalent,although univalent,trivalent,quadrivalent,and other polyvalents also occurred;in addition,chromosome configuration forms and frequencies varied among the studied *** results showed that the average number of ring bivalents in the Y genome was significantly higher than those in the St and H *** positive correlations between pollen grain fertility and ring bivalent number were found in the St and H genomes but not in the Y ***,chromosome configuration parameters(total bivalents,numbers of ring and rod bivalents)were found to be significantly correlated with heterozygosity and seed setting rates in the St and H genomes,respectively,but not in the Y *** was inferred that the seed setting rate and pollen grain fertility in *** are strongly influenced by the heterozygosity of each genome,but the Y genome differs from the S

关键词： Chromosome pairing Elymus nutans Fertility FISH and GISH Karyotype variation

Effects of total dissolved gas supersaturated water on lethality and catalase activity of Chinese sucker(Myxocyprinus asiaticus Bleeker)

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2012年第10期13卷 791-796页

作者： Shi-chao CHEN Xiao-qing LIU wen jiang Ke-feng LI Jun DU Dan-zhou SHEN quan GONG State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan UniversityChengdu 610065China School of Energy and Environment Xihua UniversityChengdu 610039China Fisheries Institute Sichuan Academy of Agricultural SciencesChengdu 611731China

Total dissolved gas(TDG) supersaturation caused by dam sluicing can result in gas bubble trauma(GBT) in fish and threaten their *** the present study,Chinese suckers(Myxocyprinus asiaticus Bleeker) were exposed to TDG supersaturated water at levels ranging from 120% to 145% for 48 *** median lethal concentration(LC 50) and the median lethal time(LT 50) were determined to evaluate acute lethal effects on Chinese *** results showed that the LC 50 values of 4,6,8,and 10 h were 142%,137%,135%,and 130%,*** LT 50 values were 3.2,4.7,7.8,9.2,and 43.4 h,respectively,when TDG supersaturated levels were 145%,140%,135%,130%,and 125%.Furthermore,the biological responses in Chinese suckers were studied by assaying the catalase(CAT) activities in gills and muscles at the supersaturation level of 140% within LT *** CAT activities in the gills and muscle tissues exhibited a regularity of a decrease after an *** activities in the muscles were increased significantly at 3/5LT 50(P0.05),but the activities were significantly lower than the normal level at 4/5LT 50 and LT 50(P<0.05).

关键词： Total dissolved gas supersaturation Median lethal time(LT 50) Median lethal concentration(LC 50) Chinese sucker Catalase

Reliability analysis of slopes considering spatial variability of soil properties based on efficiently identified representative slip surfaces

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Journal of Rock Mechanics and Geotechnical Engineering 2020年第3期12卷 642-655页

作者： Bin Wang Leilei Liu Yuehua Li quan jiang State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China University of Chinese Academy of Sciences Beijing100049China Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring Ministry of EducationSchool of Geosciences and Info-PhysicsCentral South UniversityChangsha410083China Hunan Key Laboratory of Nonferrous Resources and Geological Hazards Exploration Changsha410083China School of Geosciences and Info-Physics Central South UniversityChangsha410083China

Slope reliability analysis considering inherent spatial variability(ISV)of soil properties is timeconsuming when response surface method(RSM)is used,because of the"curse of dimensionality".This paper proposes an effective method for identification of representative slip surfaces(RSSs)of slopes with spatially varied soils within the framework of limit equilibrium method(LEM),which utilizes an adaptive K-means clustering ***,an improved slope reliability analysis based on the RSSs and RSM considering soil spatial variability,in perspective of computation efficiency,is *** detailed implementation procedure of the proposed method is well documented,and the ability of the method in identifying RSSs and estimating reliability is investigated via three slope *** show that the proposed method can automatically identify the RSSs of slope with only one evaluation of the conventional deterministic slope stability *** RSSs are invariant with the statistics of soil properties,which allows parametric studies that are often required in slope reliability analysis to be efficiently achieved with *** is also found that the proposed method provides comparable values of factor of safety(FS)and probability of failure(Pf)of slopes with those obtained from direct analysis and lite rature.

关键词： Slope reliability analysis Spatial variability Representative slip surfaces(RSSs) Response surface method(RSM) Random field simulation