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Coherent control of dressed images of four-wave mixing

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Frontiers of physics 2013年第2期8卷 228-235页

作者： Zhen-Kun Wu Yi-Qi Zhang tai-Kun liu Zhao-Yang Zhang Cheng Li Yan-Peng Zhang Min Xiao Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique Xi ' an Jiaotong UniversityChina Xi 'an 710049 Department of Physics University of Arkansas FayettevilleUSA Arkansas 72701 National Laboratory of Solid State Microstructures and Department of Physics Nanjing UniversityChina Nanjing 210093

In two-level as well as V-type three-level atomic systems, we study probe transmission, four-wave mixing （FWM） and fluorescence signals with dressing effect experimentally and theoretically. We find both the hyperfine structure （at the same energy level） and the transition dipole moment （at different energy levels） can affect the dressing effect. We also experimentally investigate that angle- control dynamics in the nonlinear propagation of the images of the probe and generated FWM in two-level atomic systems, and find that the focusing and defocusing of probe beam and FWM signals can be greatly affected by the angles between dressing fields.

关键词： four-wave mixing fluorescence dressing effect Kerr effect

Growth of high-quality perovskite (110)-SrIrO_3 thin films using reactive molecular beam epitaxy

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Chinese Physics B 2018年第8期27卷 578-581页

作者： Kai-Li Zhang Cong-Cong Fan Wan-Ling liu Yv -Feng Wu Xiang-Le Lu Zheng-tai liu Ji-Shan liu Zhong-Hao liu Da-Wei Shen State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technoloy（SIMIT）Chinese Academy of Sciences（CAS）Shanghai 200050Chia University of Chinese Academy of Sciences Beijing 100049China School of Physicai Science and Technology ShanghaiTech UniversityShanghai 200031China CAS Center for Excellence in Superconducting Electronics（CENSE） Shanghai 200050China

Recently, 5d transition metal iridates have been reported as promising materials for the manttfacture of exotic quan- tum states. Apart from the semimetallic ground states that have been observed, perovskite SrlrO3 is also predicted to have a lattice-symmetrically protected topological state in the （110） plane due to its strong： spin-orbil coupling and electron correlation. Compared with non-polar （001）-SflrO3, the especial polarity of （110）-SrIrC）3 undoubtedly adds the： difficulty of fabrication and largely impedes the research on its surface states. Here, we have successfully synthesized high-quality （110）-SflrO3 thin films on （110）-SrTiO3 substrates by reactive molecular beam epitaxy fi^r the first time. Both reflec- tion high-energy electron diffraction pattems and x-ray diffraction measurements suggest the expected orientation and outstanding crystallinity. A （1 × 2） surface reconstruction driven from the surface instabiJity, the. same as that reported in （110）-SrTiO3, is observed. The electric transport measurements uncover that （110）-SrIrO3 exhibits a more prominent semimetallic property in comparison to （001）-SrIrO3.

关键词： molecular beam epitaxy iridates topological crystalline metal sunace reconstruction

Bibliometric analysis of literature regarding ostomy research based on the Web of Science database

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Frontiers of Nursing 2018年第3期5卷 193-198页

作者： Lan Gao Xiu-Zhen Cao ying Zhang tai-Fang liu Ai-Hua Zhang taishan Medical University Tai'anShandong 271016China tai'an City Central Hospital Tai'anShandong 271000China

Objective： To analyze the literature status and research hotspots of Science Citation Index （SCI）-related ostomy in the world and to provide references for scientific research and clinical work in the stoma care field. Methods： Based on the Web of Science core database and its own analysis function, HistCite analysis software and Excel were used to study the published research about ostomy patients. Results： A total of 1,262 articles were published between 1910 and 2016 with the authors from 48 countries and regions, 1,347 research institutions, published in 321 journals, with 4,048 first authors and coauthors; globally, there was a trend of slow growth in the number of authors every year. The study in the USA was absolutely in the lead position, and Canada and Turkey were more active. China＇s circulation volume was the 15th in the world. The periodical that published most often was the Journal of Wound Ostomy and Continence Nursing. The most interdisciplinary surgical studies were surgery and nursing, where these should be considered important. The most prolific author in the field was ＂Grant＂, and the highest cited article was entitled as ＂Living with a stoma： a review of the literature＂. Conclusions： The related research of global stoma is constantly developing. The research hotspot is nursing before and after stoma surgery. China and the USA are leading countries in research. They should follow the recent trend to improve the depth and breadth of the research in the field.

关键词： Web of Science ostomy stoma literature measurement nursing

混凝土-混凝土组合梁弯曲受力性能试验及数值研究

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土木工程学报 2022年第8期55卷 14-25页

作者：聂鑫刘泰清华大学土木水利学院北京100084 清华大学土木工程安全与耐久教育部重点实验室北京100084

作为建筑工业化的重要举措,装配式混凝土结构的发展着眼于现场施工的工艺简化和品质提升。针对一种预制板端取消胡子筋的新型装配式混凝土楼盖体系,开展了两组界面抗剪构造不同的预制混凝土梁-混凝土叠合板组合梁(混凝土-混凝土组合梁)... 详细信息

作为建筑工业化的重要举措,装配式混凝土结构的发展着眼于现场施工的工艺简化和品质提升。针对一种预制板端取消胡子筋的新型装配式混凝土楼盖体系,开展了两组界面抗剪构造不同的预制混凝土梁-混凝土叠合板组合梁(混凝土-混凝土组合梁)及整浇对比梁的正截面抗弯性能试验,研究了结构形式和界面构造对破坏模式、承载能力及界面剪切滑移等结构表现的影响。建立了混凝土-混凝土组合梁界面精细化数值模型,借助通用有限元软件分析了界面配筋率和界面粘结对正截面受力性能的影响。进一步提出了混凝土-混凝土组合梁的界面抗剪塑性设计方法,使倒U型附加钢筋沿梁跨分段均匀布置,便于结构体系的设计和施工。试验及数值研究结果表明,界面抗剪措施配置充分时,混凝土-混凝土组合梁具有与整浇梁等同的正截面抗弯承载能力与延性水平,在装配式混凝土结构领域中具有广阔的应用前景。

关键词：装配式混凝土结构混凝土-混凝土组合梁正截面抗弯性能界面剪切滑移精细化数值模型界面抗剪塑性设计方法

Effects of starvation and hormones on DNA synthesis in silk gland cells of the silkworm, Bombyx moil

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Insect Science 2016年第4期23卷 569-578页

作者： Yao-Feng Li Xiang-Yun Chen Chun-Dong Zhang Xiao-Fang Tang La Wang tai-Hang liu Min-Hui Pan Cheng Lu State Key Laboratory of Silkworm Genome Biology Southwest University Key Laboratory for Sericulture Functional Genomics and Biotechnology of Agricultural Ministry Southwest University Chongqing Department of Biochemistry and Molecular Biology Chongqing Medical University Chongqing China

Silk gland cells of silkworm larvae undergo multiple cycles of endomitosis for the synthesis of silk proteins during the spinning phase. In this paper, we analyzed the endomitotic DNA synthesis of silk gland cells during larval development, and found that it was a periodic fluctuation, increasing during the vigorous feeding phase and being gradually inhibited in the next molting phase. That means it might be activated by a self- regulating process after molting. The expression levels of cyclin E, cdtl and pcna were consistent with these developmental changes. Moreover, we further examined whether these changes in endomitotic DNA synthesis resulted from feeding or hormonal stimulation. The results showed that DNA synthesis could be inhibited by starvation and re-activated by re-feeding, and therefore appears to be dependent on nutrition. DNA synthesis was suppressed by in vivo treatment with 20-hydroxyecdysone （20E）. However, there was no effect on DNA synthesis by in vitro 20E treatment or by either in vivo or in vitro juvenile hormone treatment. The levels of Akt and 4E-BP phosphorylation in the silk glands were also reduced by starvation and in vivo treatment with 20E. These results indicate that the activation of endomitotic DNA synthesis during the intermolt stages is related to feeding and DNA synthesis is inhibited indirectly by 20E.

关键词： Bombyx mori DNA synthesis endomitosis silk gland starvation 20-hydroxyecdysone

The Study for Some Subclasses of Biholomorphic Mappings by an Unified Method

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Chinese Quarterly Journal of Mathematics 2006年第2期21卷 166-175页

作者： XU Qing-hua liu tai-shun Department of Mathematics University of Science and Technology of China Hefei 230026 China Department of Mathematics Huzhou Teacher＇s College Huzhou 313000 China

Let Ω∈ C^n be a bounded starlike circular domain with 0 ∈ Ω. In this paper, we introduce a class of holomorphic mappings Mg on Ω. Let f（z） be a normalized locally biholomorphic mapping on Ω such that Jf^-1 （z） f（z） ∈Mg and z = 0 is the zero of order k＋1 of f（z） - z. We obtain the growth and covering theorems for f（z）. Especially, as corollaries, we unify and generalize many known results. Moreover, in view of proofs of corollaries, the essential relations among the subclasses of starlike mappings are shown.

关键词： growth and covering theorem starlike mapping subclasses of starlike mappings zero of order k + 1

Features and values of geological heritage resources in Shunping County,Hebei Province

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Journal of Groundwater Science and Engineering 2020年第4期8卷 349-357页

作者： YANG Jin-song liu Zhe WANG Xiang-dong ZHAO Hua SONG lei liu tai-bei WANG Cheng-min ZHANG Peng Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesShijiazhuang 050061China Key Laboratory of Quaternary Chronology and Hydro-Environmental Evolution China Geological SurveyShijiazhuang 050061China Institute of Geology China Earthquake AdministrationBeijing 100037China Qiqihar University QiqiharHeilongjiang Province 161006China

Hebei Province is rich in geological heritage resources due to its diverse landforms and unique natural ***,detailed investigation and study of the resources are still limited,and a systematic survey conducted on a small scale has not been fully *** this paper,the resource types and characteristics of the geological heritage in Shunping County are systematically discussed,on the basis of field investigation and scientific *** reference to the existing criteria for geological heritage resources survey,the heritage values and corresponding levels were assessed by using multi-factor quantitative evaluation *** results show that there are 33 geological heritage sites in Shunping County,which fall into 3 categories,10 classes and 17 *** them,2 heritage sites are above the provincial level,14 heritage sites are at the provincial level and 17 ones are below the *** heritage sites are not only natural resources with great tourism potential,but also valuable asset in geological research,human history,ecological conservation,scientific education and some other *** is hence of great significance to conduct the scientific and reasonable appraisal for having a better understanding,good protection and development of the geological heritage resources in Hebei Province.

关键词： Geological heritage Landscape assessment Hebei Province Shunping County taihang Mountain

Search for an exotic vectorlike X-quark in same-sign dilepton final states at the future 3 TeV CLIC

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Chinese Physics C 2024年第7期48卷 67-74页

作者：张艳菊常金龙刘太刚 School of Medical Engineering Xinxiang Medical UniversityXinxiang 453003China

Vectorlike quarks(VLQs)with masses at the TeV-scale have been predicted in many new physics scenarios beyond the Standard Model(SM).Based on a simplified(X,T)doublet model including the exotic vectorlike X quark(VLQ-X)with an electric charge 5/3,we study the production of the VLQ-X decaying into tW at the future Compact Linear Collider(CLIC)with √s=3 TeV including the initial state radiation and beamstrahlung *** focus on the final signals,including same-sign dileptons(electrons or muons),at least one b-tagged jet,and large missing transverse *** performing detailed signal-to-background analyses and detector simulations,we obtain the 2σexclusion capabilities and discovery reaches,respectively,on the mass of the VLQ-Xmx as well as the relevant parameters(Br(X→_(t)W))for mx≥1500GeV and the coupling strength g^(*) for mx≥1500 GeV)for some typical luminosities at the 3 TeV CLIC.

关键词： Vectorlike quarks CLIC same-sign dilepton

Finite Element Analysis of Graphite/Epoxy Composite Pressure Vessel

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Journal of Materials Science and Chemical Engineering 2017年第7期5卷 19-28页

作者： Meng-Kao Yeh tai-Hung liu Department of Power Mechanical Engineering National Tsing Hua University Taiwan

Shell structure is widely used in industrial applications, such as in machinery, aerospace, ship and building fields, as well as containers of pressurized chemicals or liquefied natural gas. Graphite/epoxy composites has advantages of light weight, high strength, corrosion resistance, low expansion, low shrin kage and are often used in the form of composite pressure vessel for various engineering applications. In this study, the stress distributions of composite pressure vessel were analyzed. The finite element code ANSYS was used in analysis, in which the eight-node element SHELL 281 was adopted. The internal pressure 20 MPa, as in container of compressed natural gas, was applied inside the symmetrical cross-ply graphite/epoxy composite pressure vessel. The finite element model was established with suitable mesh size and boundary conditions. The stress distributions are discussed for the composite pressure vessel, especially for the inner two layers at the junction of semis pherical part. The Tsai-Hill criterion was used to assess the failure of composite pressure vessel.

关键词： Finite Element Analysis Stress Analysis Composite Pressure Vessel Tsai-Hill Failure Criterion