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Communications in Theoretical Physics 2006年第4期45卷 727-731页

作者： zhou Qing-chun Department of Mathematics and Physics Jiangsu University of Science and Technology Zhenjiang 212003 China

By using the method of eigenvectors, the atomic populations and emission spectrum are investigated in a system that consists of a cascade three-level atom resonantly interacting with a single-mode tield in a Kerr-like medium. The atom and the field are assumed to be initially in the upper atomic state and the Fock state, respectively. Results for models with intensity-dependent coupling and with intensity-independent coupling are compared. It is found that both population dynamics and emission spectrum show no indications of atom-field decoupling in the strong field limit if the intensity-dependent coupling is taken into account.

关键词： population emission spectrum cascade three-level atom Kerr-like medium

Quantitative assessment of the surface crack density in thermal barrier coatings

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Acta Mechanica Sinica 2014年第2期30卷 167-174页

作者： Li Yang Zhi-chun Zhong Yi-chun zhou chun-Sheng Lu Key Laboratory of Low Dimensional Materials & Application Technology (Ministry of Education)/Faculty of Materials Optoelectronic & PhysicsXiangtan University Department of Mechanical Engineering Curtin University

In this paper, a modified shear-lag model is developed to calculate the surface crack density in thermal barrier coatings（TBCs）. The mechanical properties of TBCs are also measured to quantitatively assess their surface crack density. Acoustic emission（AE） and digital image correlation methods are applied to monitor the surface cracking in TBCs under tensile loading. The results show that the calculated surface crack density from the modified model is in agreement with that obtained from experiments. The surface cracking process of TBCs can be discriminated by their AE characteristics and strain evolution. Based on the correlation of energy released from cracking and its corresponding AE signals, a linear relationship is built up between the surface crack density and AE parameters, with the slope being dependent on the mechanical properties of TBCs.

关键词： Thermal barrier coatings Acoustic emission Surface crack density Quantitative assessment

Design and Analysis for a Three-Rotational-DOF Flight Simulator of Fighter-Aircraft

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Chinese Journal of Mechanical Engineering 2018年第3期31卷 48-59页

作者： Chang-chun zhou Yue-Fa Fang Robot Research Center Beijing Jiaotong University

Most of researchers focused on traditional six degrees of freedom(DOF) Stewart flight simulator,which can not be adaptive in fighter?aircraft flight simulator. A three rotational DOF flight simulator of fighter?aircraft based on dou?ble parallel manipulator and hybrid structure is presented. The flight simulator is composed of two identical 3?RRS(revolute?revolute?spherical) spherical parallel manipulators and one cabin,called Twins. The cabin has an additional independent DOF for 360° continuous rotation,so it can be applied as a flight simulator for a fighter?aircraft to achieve spin maneuvering. Because of the introduction of the hybrid structure and double parallel manipulator of themechanism,the redundancy exists with respect to both kinematics and actuation. Kinematics is carried out and Jaco?bian matrix is established by means of screw theory. The inverse kinematics is given out by the analytical method. 64 groups inverse solutions are showed in a table by permutation. Forward kinematics is solved by an e ectively numeri?cal method. The forward numerical method is realized based on the analytically inverse kinematics and Jacobian matrix. The numerical examples show that the forward numerical method can be used in real?time control. The rollingmotion is considered in forward kinematics and a numerical example is given out. The proposed flight simulator can spin and there are three rotational DOF with a hybrid structure so that the novel flight simulator can be used in the field of the fighter?aircraft for pilots to train.

关键词： Parallel manipulator Hybrid mechanisms Actuation redundancy Flight simulator Kinematics Screw theory Jacobian matrix

Calculation of half-life for ^(79)Se decay

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Nuclear Science and Techniques 2006年第1期17卷 21-23页

作者： zhou chun-Mei WU Zhen-Dong China Nuclear Data Center Department of Nuclear Physics China Institute of Atomic Energy Beijing 102413 China

The half-life for 79Se decay is calculated by using the Logf1ut systematics method. Based on the data analysis and comparison with experimental data the 79Se half-life is recommended. The scheme for 79Se decay is also... 详细信息

关键词：半衰期计算 ^79Se衰变数据计算核衰变

Two-dimensional PC_(3) as a promising anode material for potassium-ion batteries:First-principles calculations

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Chinese Physics B 2021年第5期30卷 563-567页

作者： chun zhou Junchao Huang Xiangmei Duan School of Physical Science and Technology Ningbo UniversityNingbo 315211China

With the diversified development of the battery industry,potassium-ion batteries(PIBs)have aroused widespread interest due to their safety and high potassium reserves on ***,the lack of suitable anode materials limits their development and application to a certain *** on first-principles calculations,we investigate the possibility of using PC_(3) monolayer as the anode material for ***_(3)sheet has excellent electrical properties and meets the prerequisite of anode *** storage capacity of potassium is as high as 1200 mAh·g^(-1),which is better than many other reported potassium-ion anode *** addition,the outstanding advantages of PC_(3)sheet,such as low diffusion barrier and moderate open-circuit voltage,make it a potential anode candidate for PIBs.

关键词： two-dimensional materials potassium-ion batteries first-principles

Chinese Herbal Medicine Adjusting Brain Microenvironment via Mediating Central Nervous System Lymphatic Drainage in Alzheimer's Disease

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Chinese Journal of Integrative Medicine 2022年第2期28卷 176-184页

作者： zhou Xi-bin ZHANG Yu-xing zhou chun-xiang MA Jun-jie Department of Traditional Chinese Medicine Nanjing University of Chinese MedicineNanjing(210046)China Department of Traditional Chinese Medicine Nanjing BenQ HospitalNanjing(210036)China

Due to its complex pathogenesis and lack of effective therapeutic methods,Alzheimer's disease(AD)has become a severe public health problem *** studies have discovered the function of central nervous system lymphatic drainage,which provides a new strategy for the treatment of *** herbal medicine(CHM)has been considered as a cure for AD for hundreds of years in China,and its effect on scavengingβ-amyloid protein in the brain of AD patients has been *** this review,the mechanism of central nervous system lymphatic drainage and the regulatory functions of CHM on correlation factors were briefly *** advances in our understanding regarding the treatment of AD via regulating the central lymphatic system with CHM will promote the clinical application of CHM in AD patients and the discovery of new therapeutic drugs.

关键词： Alzheimer's disease Chinese herbal medicine central lymphatic system

Speeding up implementation for Shor's factorization quantum algorithm

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Chinese Science Bulletin 2010年第32期55卷 3648-3653页

作者： FU XiangQun BAO WanSu zhou chun Institute of Electronic Technology the PLA Information Engineering University Zhengzhou 450004 China

In this paper, based on the implementation of semiclassical quantum Fourier transform, we first propose the concept of generation vector of ternary binary representation, construct the generation function's truth table, prove that the generation vector of ternary binary representation is one kind of k 's NAF representation and further find that its number of nonzero is not more than [(「logk」+1) /2]. Then we redesign a quantum circuit for Shor's algorithm, whose computation resource is approximately equal to that of Parker (Their requirements of elementary quantum gate are both O (「logN」3), and our circuit requires 2 qubits more than Parker's). However, our circuit is twice as fast as Parker's.

关键词：量子算法因子分解标准二进制表示注册 Vector 量子电路傅立叶变换生成函数

Highly efficient cobalt-based amorphous catalyst for peroxymonosulfate activation toward wastewater remediation

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Rare Metals 2023年第4期42卷 1160-1174页

作者： Xue-chun zhou Shuang-Qin Chen Ming-Jie zhou Mai Li Si Lan Tao Feng School of Materials Science and Engineering Herbert Gleiter Institute of NanoscienceNanjing University of Science and TechnologyNanjing210094China School of Material Science and Engineering Nanjing Institute of TechnologyNanjing211167China

Metallic glasses(MGs)are rising novae in the catalytic field,due to their unique amorphous structure,large residual stress,and high density of low coordination ***,there is still an absence of suitable MGs'catalysts for advanced oxidation processes(AOPs)with peroxymonosulfate(PMS),the most efficient and promising wastewater remediation ***,the cobalt-based MG(Co-MG)with a nominal composition of Co_(67)Fe_(4)-Mo_(1.5)Si_(16.5)B_(11)(at%)was utilized as an activator of PMS for azo dye *** results demonstrated that the CoMG/PMS system had an order of magnitude higher efficiency on OrangeⅡ(OII)degradation than the Fe-MG/PMS *** fundamental study and field application,the effect of adding inorganic anions(Cl^(-),HCO_(3)^(-),H_(2)PO_(4)^(-),SO_(4)^(2-),NO_(3)^(-)),environmental factors,and cycle experiments on the catalytic properties of Co-MG were investigated emphatically to evaluate overall degradation *** has demonstrated that the Co-MG with more stability,better corrosion resistance and durability contrasted to *** addition,the excellent catalytic performance of Co-MG was analyzed based on the quenched experiment,electron paramagnetic resonance(EPR),and X-ray photoelectron spectroscopy(XPS)*** present results provide not only a new candidate but also shed light on exploring a new kind of AOPs system based on Co-MGs for wastewater treatment.

关键词： Co-based metallic glass ribbons Inorganic ions Stability Advanced oxidation process Peroxymonosulfate Azo dyes

Semi-industrial experimental study on bauxite separation using a cell-column integration process

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International Journal of Minerals,Metallurgy and Materials 2016年第1期23卷 7-15页

作者： Ning-ning Zhang Chang-chun zhou Long-fei Cong Wen-long Cao You zhou School of Chemical Engineering and Technology China University of Mining & Technology Xuzhou 221116 China Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education) Xuzhou 221116 China

The cyclonic-static micro-bubble flotation column （FCSMC） is a highly efficient mineral processing equipment. In this study, a cell-column （FCSMC） integration process was investigated for the separation of bauxite and its feasibility was analyzed on a theoretical basis The properties of low-grade bauxite ore from Henan Province, China were analyzed. Parameters such as reagent dosage, scraping bubble time, and pressure of the circulating pump during the sorting process were investigated and optimized to improve the flotation efficiency. On the basis of these parameters, continuous separation experiments were conducted. Bauxite concentrate with an aluminum-to-silicon （A/S） mass ratio of 6.37 and a 77.63wt% recovery rate were achieved via a flow sheet consisting of ＂fast flotation using a flotation cell, one roughing flotation and one cleaning flotation using flotation columns＂. Compared with the full-flotation-cells process, the cell-column integration process resulted in an increase of the A/S ratio by 0.41 and the recovery rate by 17.58wt%. Cell-coltmm integration separation technology represents a new approach for the separation of middle-to-low-grade bauxite ore.

关键词： bauxite separation flotation flotation columns flotation cells

Acoustic emission assessment of interface cracking in thermal barrier coatings

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Acta Mechanica Sinica 2016年第2期32卷 342-348页

作者： Li Yang Zhi-chun Zhong Yi-chun zhou Wang Zhu Zhi-Biao Zhang Can-Ying Cai chun-Sheng Lu Key Laboratory of Key Film Materials & Application for Equipment (Hunan Province) School of Materials Science and EngineeringXiangtan University Key Laboratory of Low Dimensional Materials & Application Technology (Ministry of Education) School of Materials Science and EngineeringXiangtan University Department of Mechanical Engineering Curtin University

In this paper,acoustic emission（AE） and digital image correlation methods were applied to monitor interface cracking in thermal barrier coatings under *** interface failure process can be identifie via its AE features,including buckling,delamination incubation and *** to the Fourier transformation of AE signals,there arefourdifferentfailuremodes：surfaceverticalcracks,opening and sliding interface cracks,and substrate *** characteristic frequency of AE signals from surface vertical cracks is 0.21 MHz,whilst that of the two types of interface cracks are 0.43 and 0.29 MHz,*** energy released of the two types of interface cracks are 0.43 and 0.29 MHz,*** on the energy released from cracking and the AE signals,a relationship is established between the interface crack length and AE parameters,which is in good agreement with experimental results.

关键词： Thermal barrier coatings Acoustic emission Interface cracking Crack type Quantitative analysis