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Chinese Chemical Letters 2021年第1期32卷 413-416页

作者： Pei Xu Yi-ming zhu Xin-Yu Liu Xiao-Zhou Zhou shun-Yi Wang shun-Jun Ji Key Laboratory of Organic Synthesis of Jiangsu Province College of ChemistryChemical Engineering and Materials Science&Collaborative Innovation Center of Suzhou Nano Science and TechnologySoochow UniversitySuzhou 215123China

A Mn(Ⅲ) mediated radical reaction of new designed multi-functionalized 2-isocyano-6-alkenyl(alkynyl)benzonitriles with arylboronic acids has been *** reaction provides a method for the synthesis of pyrroloisoquinolin... 详细信息

关键词： 2-Isocyano-6-alkenyl(alkynyl)benzonitriles Arylboronic acids Pyrroloisoquinoline derivatives Radical reaction

FORECAST OF WATER TEMPERATURE IN RESERVOIR BASED ON ANALYTICAL SOLUTION

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Journal of Hydrodynamics 2008年第4期20卷 507-513页

作者： JI shun-wen zhu Yue-ming QIANG Sheng ZENG Deng-feng College of Water Conservancy and Hydroelectric Engineering Hohai University Nanjing 210098 China Water Power Plant of Sanhe Shangyoujiang Ganzhou 341212 China

The water temperature in reservoirs is difficult to be predicted by numerical simulations. In this article, a statistical model of forecasting the water temperature was proposed. In this model, the 3-D thermal conduction-diffusion equations were converted into a system consisting of 2-D equations with the Fourier expansion and some hypotheses. Then the statistical model of forecasting the water temperature was developed based on the analytical solution to the 2-D thermal equations. The~ simplified statistical model can elucidate the main physical mechanism of the temperature variation much more clearly than the numerical simulation with the Navier-Stokes equations. Finally, with the presented statistical model, the distribution of water temperature in the Shangyoujiang reservoir was determined.

关键词： water temperature quasi 3-D statistical model thermal conduction-diffusion equation analytical solution regression analysis factor of radiation

Properties and photodetector applications of two-dimensional black arsenic phosphorus and black phosphorus

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Science China(Information Sciences) 2021年第4期64卷 120-133页

作者： Ruyue HAN shun FENG Dong-ming SUN Hui-ming CHENG Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences School of Materials Science and Engineering University of Science and Technology of China School of Physical Science and Technology ShanghaiTech University Shenzhen Geim Graphene Center Shenzhen International Graduate School Tsinghua University

Two-dimensional(2D) black arsenic phosphorus(b-AsP), as an alloy of black phosphorus(bP) with arsenic, has attracted great attention because of its outstanding electronic and optical properties,including high carrier mobility, tunable bandgap and in-plane anisotropy. B-AsP has a smaller bandgap(0.15–0.3 eV) than the b-P bandgap(0.3–2.0 eV), and thus can be used for mid-infrared *** addition, both of them can form various van der Waals(vdW) heterojunctions with other 2D materials to realize novel functional optoelectronic devices. Here, we compare the basic characteristics of b-AsP and b-P, including crystal structure, optical properties, band structure, electrical properties and stability, and we summarize the update progress of b-AsP in photo detection, including representatives of phototransistor and photodiode devices. In the last part, the future research directions are discussed.

关键词： black arsenic phosphorus crystal structure optical property electrical property photodetector

Indirect plant defense against insect herbivores： a review

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Insect Science 2018年第1期25卷 2-23页

作者： Zainab Aljbory ming-shun Chen Department of Entomology Kansas State University Manhattan Kansas USA Hard Winter Wheat Genetics Research Unit USDA-ARS Kansas State University Manhattan Kansas USA

Plants respond to herbivore attack by launching 2 types of defenses： direct defense and indirect defense. Direct defense includes all plant traits that increase the resistance of host plants to insect herbivores by affecting the physiology and/or be- havior of the attackers. Indirect defense includes all traits that by themselves do not have significant direct impact on the attacking herbivores, but can attract natural en- emies of the herbivores and thus reduce plant loss. When plants recognize herbivore- associated elicitors, they produce and release a blend of volatiles that can attract preda- tors, parasites, and other natural enemies. Known herbivore-associated elicitors include fatty acid-amino acid conjugates, sulfur-containing fatty acids, fragments of cell walls, peptides, esters, and enzymes. Identified plant volatiles include terpenes, nitrogenous compounds, and indoles. In addition, constitive traits including extrafloral nectars, food bodies, and domatia can be further induced to higher levels and attract natural enemies as well as provide food and shelter to carnivores. A better understanding of indirect plant defense at global and componential levels via advanced high throughput technolo- gies may lead to utilization of indirect defense in suppression of herbivore damage to plants.

关键词： elicitor indirect plant defense natural enemies volatile

Yrast Bands Calculation for Odd-Odd Nuclei ^(160)Ho, ^(162)Tm and ^(164)Tm

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Chinese Physics Letters 1996年第7期13卷 504-507页

作者： zhu shun-quan ZHENG Ren-rong Department of Physics Southwest Normal UniversityChongqing 630715

In this paper,the axial symmetry rotor plus quasiparticle model is generalized from odd nuclei to odd-odd *** spectra of yrast bands for nuclei ^(160)Ho,^(162)Tm and ^(164)Tm are calculated by using the *** inversions in these three nuclei are reproduced,and one possible signature inversion mechanism connected with the calculation is also discussed.

关键词： method symmetry

Mechanism and threshold fluence of nanosecond pulsed laser paint removal

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Rare Metals 2022年第3期41卷 1022-1031页

作者： Qi Sun Jian-Zhong Zhou Xian-Kai Meng Jia-Nian Yang Zhao-Heng Guo ming zhu shun Guo School of Mechanical Engineering Jiangsu UniversityZhenjiang 212013China School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China

In this paper, the nanosecond pulse laser surface treatment of the waterborne anti-rust paint on HT250 gray cast iron was carried out. The area and depth of the per-pulse laser ablation paint layer were measured. The threshold of laser energy density was determined through the relations with ablation area and depth. The paint removal mechanism was discussed by analyzing the ablation features of the paint layer on laser cleaning. The features of the paint removal under various laser energy densities were characterized, and the process parameters in the experiments were *** results showed that there were four thresholds and three kinds of mechanisms in the paint removal process with nanosecond pulsed laser. The ablation threshold of substrate was deepened on the laser parameters. The ablation processes were included thermal ablation, thermal vibration and paint ionization concurrently, respectively. The surface cracks and paint debris were observed at the edge of the cleaning path, which were ascribed to the vibration effect by laser. In addition, the vibration effect could significantly increase the width of paint removal. Paint ionization has also a significant influence on the substrate morphology. Paint ionization would have an obvious impact on the formation of the substrate morphology. It is desirable to fabricate approach to remove the paint layer without damaging the substrate under optimized laser parameters by nanosecond pulse laser.

关键词： Laser paint removal Threshold of energy density Paint removal mechanism Surface morphology

Analytical computation of magnetic field in coil-dominated superconducting quadrupole magnets based on racetrack coils

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Nuclear Science and Techniques 2024年第4期35卷 119-135页

作者： Chuang Shen Ying-shun zhu Fu-San Chen China Spallation Neutron Source Institute of High Energy PhysicsChinese Academy of Sciences1 Zhongziyuan RoadDongguan 523000China Institute of High Energy Physics Chinese Academy of Sciences19B Yuquan RoadBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Currently,three types of superconducting quadrupole magnets are used in particle accelerators:cos 2θ,CCT,and ***,all three coil configurations have complex spatial geometries,which make magnet manufacturing and strain-sensitive superconductor applications *** with the three existing quadrupole coils,the racetrack quadrupole coil has a simple shape and manufacturing process,but there have been few theoretical *** this paper,the two-dimensional and three-dimensional analytical expressions for the magnetic field in coil-dominated racetrack superconducting quadrupole magnets are *** analytical expressions of the field harmonics and gradient are fully resolved and depend only on the geometric parameters of the coil and current ***,a genetic algorithm is applied to obtain a solution for the coil geometry parameters with field harmonics on the order of 10^(-4).Finally,considering the practical engineering needs of the accelerator interaction region,electromagnetic design examples of racetrack quadrupole magnets with high gradients,large apertures,and small apertures are described,and the application prospects of racetrack quadrupole coils are analyzed.

关键词： Superconducting quadrupole magnet Racetrack coil Multipole field Genetic algorithm Magnetic design

Exploring multiple equilibria for symmetric 2×2 CES/LES pure exchange economies

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Applied Mathematics(A Journal of Chinese Universities) 2010年第2期25卷 137-154页

作者： SHI Xiao-jun ZHANG shun-ming School of Economics and Management Beijing University of Aeronautics and Astronautics Beijing 100191 China China Financial Policy Research Center Renmin University of China Beijing 100872 China

This paper explores the existence of 3 equilibria for symmetric 2-individual 2-good CES/LES pure exchange economies. For certain parameterizations in the economies, we show analytically that there are no more than 3 equilibria. We generalize our analytical results of existence of 3 equilibria for a wide range of parameterizations. Then we provide examples of 3 equilibria and parameter zones of 3 equilibria for CES and CES/LES economies.

关键词： Multiple equilibria Cobb-Douglas utility function CES/LES utility function.

Strong Consistency of the Empirical Martingale Simulation Option Price Estimator

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Acta Mathematicae Applicatae Sinica 2009年第3期25卷 355-368页

作者： zhu-shun Yuan Ge-mai Chen Department of Mathematics and Statistics University of Calgary 2500 University Drive NW Calgary Alberta Canada T2N 1N4

A simulation technique known as empirical martingale simulation （EMS） was proposed to improve simulation accuracy. By an adjustment to the standard Monte Carlo simulation, EMS ensures that the simulated price satisfies the rational option pricing bounds and that the estimated derivative contract price is strongly consistent with payoffs that satisfy Lipschitz condition. However, for some currently used contracts such as self-quanto options and asymmetric or symmetric power options, it is open whether the above asymptotic result holds. In this paper, we prove that the strong consistency of the EMS option price estimator holds for a wider class of univariate payoffs than those restricted by Lipschitz condition. Numerical experiments demonstrate that EMS can also substantially increase simulation accuracy in the extended setting.

关键词： Monte carlo Black-scholes GARCH

Design of dual-functional protic porous ionic liquids for boosting selective extractive desulfurization

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Petroleum Science 2024年第4期21卷 2817-2829页

作者： Jin-Rui Zhang Jie Yin Jing He Hong-shun Ran Wei Jiang Hong-Ping Li Wen-Shuai zhu Hua-ming Li ming Zhang School of the Environment and Safety Engineering&Institute for Energy Research Jiangsu UniversityZhenjiang212013JiangsuChina School of Chemistry and Chemical Engineering Jiangsu UniversityZhenjiang212013JiangsuChina

Porous ionic liquids have demonstrated excellent performance in the field of separation,attributed to their high specific surface area and efficient mass ***,task-specific protic porous ionic liquids(PPILs)were prepared by employing a novel one-step coupling neutralization reaction strategy for extractive *** single-extraction efficiency of PPILs reached 75.0%for ***,adding aromatic hydrocarbon interferents resulted in a slight decrease in the extraction efficiency of PPILs(from 45.2%to 37.3%,37.9%,and 33.5%),indicating the excellent extraction selectivity of *** experimental measurements and density functional theory calculations reveal that the surface channels of porous structures can selectively capture dibenzothiophene by the stronger electrophilicity(Eint(HS surface channel/DBT)=-39.8 kcal mol^(-1)),and the multiple extraction sites of ion pairs can effectively enrich and transport dibenzothiophene from the oil phase into PPILs throughπ...π,C-H...πand hydrogen bonds ***,this straightforward synthetic strategy can be employed in preparing porous liquids,offering new possibilities for synthesizing PPILs with tailored functionalities.

关键词： Protic porous ionic liquids Extractive desulfurization Selectivity Density functional theory