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Anisotropic Transport on Monolayer and Multilayer Phosphorene in the presence of an Electric Field

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Chinese Physics Letters 2019年第5期36卷 71-74页

作者： Gufeng Fu Fang Cheng Department of Physics and Electronic Science Changsha University of Science and TechnologyChangsha 410004

We demonstrate theoretically the anisotropic quantum transport of electrons through an electric field on monolayer and multilayer phosphorene. Using the long-wavelength Hamiltonian with continuum approximation, we find that the transmission probability for transport through an electric field is an oscillating function of incident angle, electric field intensity, as well as the incident energy of electrons. By tuning the electric field intensity and incident angle, the channels can be transited from opaque to transparent. The conductance through the quantum waveguides depends sensitively on the transport direction because of the anisotropic effective mass, and the anisotropy of the conductance can be tuned by the electric field intensity and the number of layers. These behaviors provide us an efficient way to control the transport of phosphorene-based microstructures.

关键词： BP Anisotropic Transport on Monolayer and Multilayer Phosphorene in the presence of an Electric Field

The Probe Transmission Spectra of^(87)Rb in an Operating Magneto-Optical Trap in the presence of an Ionizing Laser

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Chinese Physics Letters 2013年第4期30卷 69-72页

作者： LIU Long-Wei JIA Feng-Dong RUAN Ya-Ping HUANG Wei LV Shuang-Fei XUE Ping XU Xiang-Yuan DAI Xing-Can ZHONG Zhi-Ping School of Physics University of Chinese Academy of SciencesPO Box 4588Beijing 100049 State Key Laboratory for Low-Dimensional Quantum Physics Department of PhysicsTsinghua UniversityBeijing 100084 Department of Physics Capital Normal UniversityBeijing 100037

The influence of an ionizing laser on the pump-probe spectra of^(87)Rb over the transition 5^(2)S_(1/2),F=2→5^(2)P_(3/2),F'=3 is experimentally studied in an operating magneto-optical *** spectral features,including gain peak,a dispersion-like structure and absorption peak,become weak as the intensity of the ionizing laser ***,the profiles of the absorption peak and gain peak vary as the ionizing laser intensity *** results indicate that there is more than one component in the two features and that each component has different dependences on the number of^(87)Rb atoms.

关键词： pump ionizing presence

High-Order Harmonic Generation in the presence of Static Electric Field

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Chinese Physics Letters 1998年第3期15卷 195-197页

作者： WANG Bing-bing LI Xiao-feng FU Pan-ming Laboratory of Optical Physics Institute of Physics&Center for Condensed Matter PhysicsChinese Academy of SciencesBeijing 100080

We study the effects of the static electric field on the high-order harmonic generation(HOHG).It is found that the presence of the static electric field breaks the inversion and reflection symmetry,as a result,the HOHG spectrum exhibits a double plateau ***,the cutoff of the HOHG is no longer corresponding to the maximum kinetic energy the ionized electron can obtain from the laser ***,it corresponds to the maximum kinetic energy of the electron with one return.

关键词： presence return Harmonic

Synthesis of Spirostanol Saponins via Gold(Ⅰ)-Catalyzed Glycosylation in the presence of Ga(Otf)3, In(Otf)3, or HOTf

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Chinese Journal of Chemistry 2019年第8期37卷 827-833页

作者： Teddy Stephen Ehianeta Dacheng Shen Peng Xu Biao Yu State Key Laboratory of Bio-organic and Natural Products Chemistry Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryChinese Academy of Sciencesand University of Chinese Academy of Sciences345 Lingling RoadShanghai 200032China

Summary of main observation and conclusion An effective approach relying on a Lewis acid-or Brφnsted acid-assisted gold(Ⅰ)-catalyzed glycosylation has been reported in the synthesis of a panel of the representative natural spirostanol saponins,namely polyphyllin D (1),polyphyllin V (2),dioscin (3),formosanin C (4),and a derivative of polyphyllin D bearing a terminal azide group (5).This approach highlights the engagement of low Ioadings of Ph3AuPOTf (≤ 0.5mol%) in the presence of Ga(OTf)3,In(OTf)3,or HOTf (~10 mol%) as a co-catalyst,at practical reaction rates as an alternative to the conventional ~10 mol%Ioadings of the gold(Ⅰ) catalyst in the *** D (1) was obtained in 41% overall yield over six steps compared to the maximum 30% yield in previous syntheses,where conventional donors and promoters were *** exploiting a regioselective rhamnosylation,a "one-pot" approach was adopted to assemble 1 and 5,thus further strengthening the efficiency of the gold(Ⅰ)-catalyzed glycosylation.

关键词： presence via practical presence catalyst mol was has

Effects of Virtual-real fusion on immersion,presence,and learning performance in laboratory education

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Virtual Reality & Intelligent Hardware 2020年第6期2卷 569-584页

作者： Jingcheng QIAN Yancong MA Zhigeng PAN Xubo YANG School of Software Shanghai Jiao Tong UniversityShanghai 200240China Student Innovation Center Shanghai Jiao Tong UniversityShanghai 200240China 不详

Background Virtual-reality(VR)fusion techniques have become increasingly popular in recent years,and several previous studies have applied them to laboratory ***,without a basis for evaluating the effects of virtual-real fusion on VR in education,many developers have chosen to abandon this expensive and complex set of *** In this study,we experimentally investigate the effects of virtual-real fusion on immersion,presence,and learning *** participant was randomly assigned to one of three conditions:a PC environment(PCE)operated by mouse;a VR environment(VRE)operated by controllers;or a VR environment running virtual-real fusion(VR VRFE),operated by real *** The analysis of variance(ANOVA)and t-test results for presence and self-efficacy show significant differences between the PCE*VR-VRFE condition ***,the results show significant differences in the intrinsic value of learning performance for pairs PCE*VR VRFE and VRE*VR-VRFE,and a marginally significant difference was found for the immersion *** The results suggest that virtual-real fusion can offer improved immersion,presence,and self efficacy compared to traditional PC environments,as well as a better intrinsic value of learning performance compared to both PC and VR *** results also suggest that virtual-real fusion offers a lower sense of presence compared to traditional VR environments.

关键词： Education Immersion presence Virtual-Real Fusion Virtual Reality

presence OF FREE RADICALS IN PIGMENT GALLSTONE IN VIVO

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Chinese Medical Journal 1996年第6期 30-33页

作者：沈韬林丛杨正红翁诗甫申国荣顾燕恬许振华傅贤波王夔吴瑾光周孝思

ＰＲＥＳＥＮＣＥＯＦＦＲＥＥＲＡＤＩＣＡＬＳＩＮＰＩＧＭＥＮＴＧＡＬＬＳＴＯＮＥＩＮＶＩＶＯＳｈｅｎＴａｏ沈韬，ＬｉｎＣｏｎｇ林丛，ＹａｎｇＺｈｅｎｇｈｏｎｇ杨正红，ＷｅｎｇＳｈｉｆｕ翁诗甫ＬｕＪｉｎｇｆｅｎ卢景雨分... 详细信息

ＰＲＥＳＥＮＣＥＯＦＦＲＥＥＲＡＤＩＣＡＬＳＩＮＰＩＧＭＥＮＴＧＡＬＬＳＴＯＮＥＩＮＶＩＶＯＳｈｅｎＴａｏ沈韬，ＬｉｎＣｏｎｇ林丛，ＹａｎｇＺｈｅｎｇｈｏｎｇ杨正红，ＷｅｎｇＳｈｉｆｕ翁诗甫ＬｕＪｉｎｇｆｅｎ卢景雨分，ＳｈｅｎＧｕｏｒｏｎｇ申国荣，Ｇ...

关键词：申国 OF RADICALS GALLSTONE PIGMENT presence 林丛 FREE

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一种新的presence建模方法

高技术通讯 2007年第2期17卷 124-129页

作者：沈奇威廖建新北京邮电大学网络与交换技术国家重点实验室北京100876

在分析presence信息特征的基础上，提出了presence模型的建模需求和功能目标，并指出：信息共享、隐私保护以及信息融合要求对信息提供一致的管理方式，可通过建立presence信息模型来解决这一问题，信息模型的建立应该直观和易用。根据... 详细信息

在分析presence信息特征的基础上，提出了presence模型的建模需求和功能目标，并指出：信息共享、隐私保护以及信息融合要求对信息提供一致的管理方式，可通过建立presence信息模型来解决这一问题，信息模型的建立应该直观和易用。根据建模需求对适用的建模方法进行了比较，建立了一种新的面向普通应用开发者的混合建模方法，结合图形化建模和本体建模的优点，在建模过程引入了模型驱动结构（MDA）方法和工程化思想，标准化的表达方式和规范的建模步骤保证了建模的质量。

关键词： presence 建模方法模型驱动结构(MDA) 本体

presence of Heat on an Infinite Plate with a Curvilinear Hole Having Two Poles

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Journal of Modern Physics 2015年第6期6卷 837-853页

作者： F. S. Bayones Math. Dept. Faculty of Science Taif University Taif KSA

In the present paper Cauchy integral methods have been applied to derive exact and expressions for Goursat’s function for the first and second fundamental problems of isotropic homogeneous perforated infinite elastic media in the presence of uniform flow of heat. For this, we considered the problem of a thin infinite plate of specific thickness with a curvilinear hole where the origins lie in the hole is conformally mapped outside a unit circle by means of a specific rational mapping. Moreover, the three stress components σxx, σyy and σxy of the boundary value problem in the thermoelasticity plane are obtained. Many special cases of the conformal mapping and four applications for different cases are discussed and many main results are derived from the work.

关键词： An Elastic Plate presence of Heat Curvilinear Hole Cauchey Method Conformal Mapping

Parental presence Promoted Children Anesthesia Recovery: A Randomized Controlled Study

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Yangtze Medicine 2020年第1期4卷 54-61页

作者： Rong Hai Liu Zhang Xin Liang Gaijing Wang Zumei Gao Department of Medicine Yangtze University Jingzhou China Nursing Department of First Affiliated Hospital of Yangtze University Jingzhou China

Objective: There are few studies about restlessness and awakening of children during recovering from anesthesia accompanied by parents. Only one related study was retrieved in China. The purpose of this study is to investigate the effect of awakening, agitation and pain level in children after tonsillectomy accompanied by their parents. Methods: Children who met the inclusion criteria were randomly divided into experimental group and control group according to coin tossing method. There were 30 cases in the experimental group and 32 in the control group. The control group received routine nursing while the experimental group was given parental presence on the basis of routine nursing. Steward awakening score, Pediatric anesthesia emergence delirium (PAED), Scale and FLACC pain assessment scale were used to evaluate the children when they entered anesthesia recovery room and awaked respectively. Results: There was no significant difference in the scoring of three scales between the two groups when they entered anesthesia recovery room (P > 0.05). There was significant difference in Steward awakening score and PAED scale between the two groups when they came to recovery room (P P > 0.05). Conclusion: Parental presence can improve the recovery effect and reduce the restlessness of children after operation. Our study suggests that anesthetic children should be accompanied by their parents in the future.

关键词： Parental presence Children Agitation Pain