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Induced phase transition of BECs in optical lattices by impurity

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science china(Physics,Mechanics & Astronomy) 2010年第3期53卷 469-473页

作者： tian dongping1,2.& LIU XuanZuo1 1Institute of Condensed Matter Physics, {2. of science, xi’an jiaotong University, xi’an 710049, china 2.4}’an University of Architecture and Technology, xi’an 710055, china 1. Institute of Condensed Matter Physics School of Science Xi’an Jiaotong University Xi’an 710049 China2. Xi’an University of Architecture and Technology Xi’an 710055 China

In this work, the influence of imparity on BECs in optical lattices is investigated, and the possibility of MI-SF transition induced by impurity is verified. After the numerical calculation, the schematic phase diagram is discussed with an emphasis on the role of impurity. When n10 = n2., the phase boundaries coincide with each other; when n10 2. and U12.10 2. and U12.> 0, the phase boundaries may or may not intersect, depending on the values of U12. n10 and n2..

关键词： BECs Green function MI-SF transition

Entanglement in spin-1 Heisenberg XY chain

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science china(Physics,Mechanics & Astronomy) 2008年第7期51卷 817-822页

作者： QIN Meng TAO YingJuan hu mingliang {2. dongping school of science Xi’an Jiaotong UniversityXi’an 710049China xi’an Institute of Post and Telecommunications Xi’an 710061China

We investigated the quantum entanglement in spin-1 Heisenberg XY chain for two-spin-qutrit and multi-particle systems. As a measure of the entanglement, the negativity of this state was analyzed as a function of the temperature and the magnetic field. We gave some numerical results and discussed them in detail. We found that the negativity increases monotonously with the coupling constants |J1| and |J2., and it showed a symmetry with respect to the point of J1=0 and J2.0. In addition to the above features, there is evidence that the critical temperature is independent of the length of the chain.

关键词： Heisenberg chain bipartite entanglement negativity

Expert consensus on pediatric orthodontic therapies of malocclusions in children

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International Journal of Oral science 2024年第2期16卷 186-196页

作者： Chenchen Zhou Peipei Duan Hong He Jinlin Song Min hu Yuehua Liu Yan Liu Jie Guo Fang Jin Yang Cao Lingyong Jiang Qingsong Ye Min Zhu Beizhan Jiang Wenhua Ruan xiao Yuan huang Li Rui Zou Yulou tian Li Gao Rui Shu Jianwei Chen Renkai Liu Shujuan Zou xiaobing Li State Key Laboratory of Oral Diseases&National Center for Stomatology&National Clinical Research Center for Oral Diseases&Department of Pediatric Dentistry West China Hospital of StomatologySichuan UniversityChengduChina State Key Laboratory of Oral Diseases&National Center for Stomatology&National Clinical Research Center for Oral Diseases&Department of Orthodontics West China Hospital of StomatologySichuan UniversityChengduChina State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration&Key Laboratory of Oral Biomedicine Ministry of Education&hubei Key Laboratory of Stomatology&Department of Orthodontics&Center for Dentofacial Development and Sleep Medicine School and Hospital of StomatologyWuhan UniversityWuhanChina Chongqing Key Laboratory of Oral Diseases and Biomedical sciences&Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education Stomatological Hospital of Chongqing Medical UniversityChongqing Medical University&College of StomatologyChongqing Medical UniversityChongqingChina Department of Orthodontics Hospital of StomatologyJilin UniversityChangchunChina Department of Orthodontic&Oral Biomedical Engineering Laboratory Shanghai Stomatological HospitalFudan UniversityShanghaiChina Department of Orthodontics Central LaboratoryPeking University School and Hospital for Stomatology&National Center for Stomatology&National Clinical Research Center for Oral Diseases&National Engineering Research Center of Oral Biomaterials and Digital Medical Devices&Beijing Key Laboratory of Digital Stomatology&Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health&NMPA Key Laboratory for Dental Materials&National Engineering Research Center of Oral Biomaterials and Digital Medical DevicesBeijingChina Department of Orthodontics School and Hospital of StomatologyCollege of MedicineShandong University&Shandong Key Laboratory of Oral Tissue Regeneration&Shandong Engineering Laboratory for Dental Materials and Oral Tissue

Malocclusion,identified by the World Health Organization(WHO)as one of three major oral diseases,profoundly impacts the dental-maxillofacial functions,facial esthetics,and long-term development of~2.0 million children in *** its physical manifestations,malocclusion also significantly influences the psycho-social well-being of these *** intervention in malocclusion can foster an environment conducive to dental-maxillofacial development and substantially decrease the incidence of malocclusion or reduce the severity and complexity of malocclusion in the permanent dentition,by mitigating the negative impact of abnormal environmental influences on the *** orthodontic treatment encompasses accurate identification and treatment of dental and maxillofacial morphological and functional abnormalities during various stages of dental-maxillofacial development,ranging from fetal stages to the early permanent dentition *** an economic and societal standpoint,the urgency for effective early orthodontic treatments for malocclusions in childhood cannot be overstated,underlining its profound practical and social *** consensus paper discusses the characteristics and the detrimental effects of malocclusion in children,emphasizing critical need for early *** elaborates on corresponding core principles and fundamental approaches in early orthodontics,proposing comprehensive guidance for preventive and interceptive orthodontic treatment,serving as a reference for clinicians engaged in early orthodontic treatment.

关键词： permanent stated children

Teleportation of an arbitrary two-qudit state based on the non-maximally four-qudit cluster state

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science china(Physics,Mechanics & Astronomy) 2008年第10期51卷 1523-1528页

作者： tian dongping TAO YingJuan QIN Meng school of science Xi’an Jiaotong UniversityXi’an 710049China xi’an Institute of Post and Telecommunications Xi’an 710061China

Two different schemes are presented for quantum teleportation of an arbitrary two-qudit state using a non-maximally four-qudit cluster state as the quantum channel. The first scheme is based on the Bell-basis measurements and the re-ceiver may probabilistically reconstruct the original state by performing proper transformation on her particles and an auxiliary two-level particle; the second scheme is based on the generalized Bell-basis measurements and the probability of successfully teleporting the unknown state depends on those measurements which are adjusted by Alice. A comparison of the two schemes shows that the latter has a smaller probability than that of the former and contrary to the former, the channel information and auxiliary qubit are not necessary for the receiver in the latter.

关键词： quantum teleportation qudit cluster state generalized Bell-basis

The coupling effect of slow-rate mechanical motion on the confined etching process in electrochemical mechanical micromachining

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science china Chemistry 2018年第6期61卷 715-724页

作者： Lianhuan Han Yuchao Jia Yongzhi Cao Zhenjiang hu Xuesen Zhao Shusen Guo Yongda Yan Zhongqun tian dongping Zhan Key Laboratory of Micro-Systems and Micro-Structures Manufacturing of Ministry of Education Harbin Institute of Technology Center for Precision Engineering Harbin Institute of Technology State Key Laboratory of Physical Chemistry of Solid Surfaces (PCOSS) Collaborative Innovation Centre of Chemistry for Energy Materials(iChEM) and Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University

By introducing the mechanical motion into the confined etchant layer technique(CELT), we have developed a promising ultraprecision machining method, termed as electrochemical mechanical micromachining(ECMM), for producing both regular and irregular three dimensional(3 D) microstructures. It was found that there was a dramatic coupling effect between the confined etching process and the slow-rate mechanical motion because of the concentration distribution of electrogenerated etchant caused by the latter. In this article, the coupling effect was investigated systemically by comparing the etchant diffusion, etching depths and profiles in the non-confined and confined machining modes. A two-dimensional(2.D) numerical simulation model was proposed to analyze the diffusion variations during the ECMM process, which is well verified by the machining experiments. The results showed that, in the confined machining mode, both the machining resolution and the perpendicularity tolerance of side faces were improved effectively. Furthermore, the theoretical modeling and numerical simulations were proved valuable to optimize the technical parameters of the ECMM process.

关键词： confined etchant layer technique electrochemical micromachining coupling effect mechanical motion confined etching

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水蛭免加热提取物抗凝血作用及其机制研究

山东中医杂志 2003年第11期22卷 687-690页

作者：史小莲刘俊田李西宽苟伟刘传镐邓昌沪西安交通大学医学院陕西西安710061 西安交通大学医学院机能教学与实验中心陕西西安710061 厦门今润医药科学有限公司福建厦门361006

目的 :观察水蛭免加热提取物对动物凝血系统、凝血因子活性及纤溶系统的影响 ,并与水蛭煎煮浓缩物进行比较。方法 :动物灌胃给药 ,凝固法测大鼠 PT、APTT,PT法测血浆凝血因子、、、的活性 ,APTT法测因子的活性 ,测 EL T观察药物... 详细信息

目的 :观察水蛭免加热提取物对动物凝血系统、凝血因子活性及纤溶系统的影响 ,并与水蛭煎煮浓缩物进行比较。方法 :动物灌胃给药 ,凝固法测大鼠 PT、APTT,PT法测血浆凝血因子、、、的活性 ,APTT法测因子的活性 ,测 EL T观察药物对家兔纤溶活性的影响。结果 :水蛭免加热提取物能延长大鼠 PT、APTT,抑制凝血因子、、的活性 ,对凝血因子和活性无明显影响 ;对兔血 EL T无明显影响 ,在延长大鼠 PT、降低大鼠凝血因子、活性等方面优于传统的煎煮提取物。结论 :水蛭免加热提取物通过抑制凝血因子、、活性而抑制内、外源性凝血途径 ,对大鼠 PT、凝血因子、

关键词：水蛭免加热提取物抗凝血凝血因子实验研究

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近存计算架构AI芯片中子单粒子效应

物理学报 2024年第13期73卷 378-385页

作者：杨卫涛胡志良何欢莫莉华赵小红宋伍庆易天成梁天骄贺朝会李永宏王斌吴龙胜刘欢时光西安电子科技大学微电子学院西安710071 西安交通大学核科学与技术学院西安710049 散裂中子源科学中心东莞523803 空军工程大学航空工程学院西安710000 西安电子科技大学空间科学与技术学院西安710071

利用中国散裂中子源大气中子辐照谱仪,对某款16 nm FinFET工艺制造的近存计算架构人工智能AI芯片进行了大气中子单粒子效应辐照测试研究.辐照测试中,在累积中子注量为1.51×10^(10)n/cm^(2.(1 MeV以上)情况下,共探测到5类共计35个软错误... 详细信息

利用中国散裂中子源大气中子辐照谱仪,对某款16 nm FinFET工艺制造的近存计算架构人工智能AI芯片进行了大气中子单粒子效应辐照测试研究.辐照测试中,在累积中子注量为1.51×10^(10)n/cm^(2.(1 MeV以上)情况下,共探测到5类共计35个软错误,尤其是探测到不同于传统冯诺伊曼架构芯片单粒子效应的计算与存储单元同时发生单粒子效应新现象.基于所探测到的两类功能单元同时单粒子效应新现象,结合蒙特卡罗仿真模拟,初步给出了近存计算架构AI芯片内物理布局上,核心功能单元间可降低同时发生单粒子效应的安全间距建议.该研究为进一步探究非传统冯诺伊曼架构芯片单粒子效应提供了参考与借鉴.

关键词：近存计算 AI芯片散裂中子源大气中子单粒子效应

维普期刊数据库博看期刊

Fabricating PdCe/OMS-2.catalysts with boosted low-temperature activity for toluene deep degradation

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Journal of Rare Earths 2023年第6期41卷 839-849,I0002页

作者： Lin Yue Zhihua Xu Minghua hu Mingjiao tian Mudi Ma Bijie huang Chi He State Key Laboratory of Multiphase Flow in Power Engineering School of Energy and Power EngineeringXi'an Jiaotong UniversityXi'an 710049China State Key Laboratory of Precision Blasting and hubei Key Laboratory of Industrial Fume and Dust Pollution Control Jianghan UniversityWuhan 430056China National Engineering Laboratory for VOCs Pollution Control Material&Technology University of Chinese Academy of SciencesBeijing 101408China

Porous cryptomelane-type octahedral molecular sieve(OMS-2.with mixed Mn valence and abundant lattice oxygen species has attracted much attention in volatile organic compounds(VOC)catalytic ***,complete conversion of arene over OMS-2.catalysts at relatively low temperature is still a challenge due to its limited crystal structure and inferior ***,a series of PdCe/OMS-2.catalysts with different Pd/Ce molar ratios was fabricated by a facile impregnation method and the physicochemical properties of which were extensively characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),high-resolution transmission electron microscopy(HR-TEM),B runauer-Emmett-Teller(BET)method,X-ray fluorescence(XRF),X-ray photoelectron spectroscopy(XPS),temperature programmed reduction of H2.H2.TPR),Raman,In situ diffused reflectance infrared Fourier transform spectra(DRIFTS),and density functional theory(DFT)*** show that the total conversion of toluene can be achieved at 2.7℃ over PdCe2.with apparent activation energy as low as 62.6 kJ/*** strong synergistic effect between Pd and Ce remarkably boosts the catalytic activity of OMS-2.attributed to the abundant Mn^(3+)-O bands and active surface oxygen *** results reveal that oxygen vacancy can be formed over PdCe2.much easily than that of Pd/OMS-2.and Ce/OMS-2.with the oxygen vacancy formation energy of2.42.2.83 and 2.68 eV,*** increasing the Pd content cannot promote the catalytic activity although PdO is a critical active center in toluene *** vacancy attributed to the integrative effect of Pd,Ce and Mn species plays a promine nt role over prepared catalysts in toluene activation *** findings reported in this work showed new insights into the designing of highly efficient OMS-2.atalysts for VOC deep oxidation by tuning oxygen vacancy concentration.

关键词： PdCe/OMS-2 Toluene Catalytic oxidation Oxygen vacancy Rare earths

Enhanced energy storage performance under low electric field in Sm^(3+) doped AgNbO_(3) ceramics

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Journal of Materiomics 2022年第2期8卷 266-273页

作者： Jing Li Li Jin Ye tian Chao Chen Yu Lan Qingyuan hu Chao Li {2.aoyong Wei Haixue Yan Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education&International Center for Dielectric ResearchSchool of Electronic Science and EngineeringFaculty of Electronic and Information EngineeringXi'an Jiaotong UniversityXi'an710049China school of Materials science and Engineering Shaanxi University of Science&TechnologyXi'an710021China Instrument Analysis Center Xi'an Jiaotong UniversityChina school of Engineering and Materials science Queen Mary University of LondonMile End RoadLondonE14NSUK Materials Research Institute Queen Mary University of LondonMile End RoadLondonE14NSUK

Herein,Ag_(1-3x)Sm_(x)NbO_(3)(0≤x≤0.02.)antiferroelectric ceramics were successfully synthesized by solid state *** effect of Sm 3þdoping on the structure,property and energy storage performance were *** the increasing Sm^(3+)concentrations,the average grain size ***,the stability of high temperature M phases(i.e.,the structure between T_(f) and T_(3))was expanded,which led to low loss for energy *** of structure analysis and ferroelectric tests revealed the existence of weakly polar/AFE-like phase below T_(f).The Sm 3þdoping tended to suppress the ferroelectric behavior and expand the stability of ***,a significantly enhanced energy storage performance(W_(rec)=3.8 J/cm^(3),η=73%)could be achieved in Ag_(0.97)Sm_(0.01)NbO_(3) ceramic,which was almost 1.5 times larger than that in non-doped AgNbO_(3)(W_(rec)=2.4 J/cm^(3),η=45%)under the similar applied field of 1705 kV/cm±.In particular,the performance of the ceramic showed great temperature stability with variation of±5%from 2.℃ to 12.℃.These results indicated that the Ag_(0.97)Sm_(0.01)NbO_(3) ceramic could be an ideal lead-free candidate used in the energy storage field.

关键词： Energy storage Lead-free Antiferroelectricity Ferroelectric