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Synthesis and Crystal Structure of a New Complex [CuL(Phen)]·NO_3

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Chinese Journal of Structural Chemistry 2006年第11期25卷 1343-1346页

作者： qiu xiao-Hang ZHAO Jun TONG xiao-Lan Department of Chemistry Nankai University Tianjin 300071 China

A new mononuclear copper（Ⅱ） complex [CuL（Phen）]-NO3 （L - 2-{2-[（3,5-dibro- mosalicylidene）amino]ethyl }- 1 H- 1,3-benzimidazole, Phen = 1,10-phenanthroline） has been synthesized and its crystal structure was determined by X-ray diffraction method. It crystallizes in monoclinic, space group C2/c with a = 24.966（7）, b = 15.673（4）, c = 16.600（5） A,β = 123.981（4）°, C28H20Br2CuN604, Mr = 727.86, V = 5386（2） A^3, Z = 8, Dc = 1.795 g/cm^3,μ（MoKα = 3.826 mm^-1, F（000） = 2888, the final R = 0.0508 and wR = 0.1024 for 5440 independent reflections with Rint = 0.1134. The title compound is composed of [CuL（Phen）]＋ cation and NO3^- anion. The coordination geometry around copper atom is a highly distorted trigonal bipyramid consisting of one benzimidazole nitrogen atom, one phenolato oxygen atom and one phenanthroline nitrogen atom on the equatorial plane together with one imine nitrogen atom and one phenanthroline nitrogen atom occupying the axial positions. The hydrogen bonding and π-π stacking interactions link the copper complex molecules into a 3-D supramolecular structure.

关键词： crystal structure copper complex 1,10-phenanthroline hydrogen bonds

Optimization of Electron Density and Temperature Profiles in Tokamaks via Safety Factor Profile

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Chinese Physics Letters 2001年第8期18卷 1101-1102页

作者： qiu xiao-Ming PENG xiao-Dong Southwestern Institute of Physics P.O.Box 432Chengdu 610041

The turbulent particle and thermal transport scaling laws are derived by means of Lagrangian invariant of trapped electron dynamics in tokamaks,which are in good agreement with experimental *** the basis of the two scaling laws,it is proposed that the optimization of electron density and temperature profiles can be achieved by designing a desirable safety factor profile.

关键词： Electron scaling Profiles

Suppression of Rayleigh-Taylor instability by gyroviscosity and sheared axial flow in imploding plasma pinches

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核聚变与等离子体物理 2007年第2期27卷 87-94页

作者： HUANG Lin JIAN Guang-de qiu xiao-ming Southwestern In stitute of Physics Chengdu 610041

The synergistic stabilizing effect of gyroviscosity and sheared axial flow on the Rayleigh-Taylor instability in Z-pinch implosions is studied by means of the incompressible viscid magneto-hydrodynamic *** gyroviscosity(or finite Larmor radius) effects are introduced in the momentum equation through an anisotropic ion stress *** relation with the effect of a density discontinuity is *** results indicate that the short-wavelength modes of the Rayleigh-Taylor instability are easily stabilized by the gyroviscosity *** long wavelength modes are stabilized by the sufficient sheared axial ***,the synergistic effects of the finite Larmor radius and sheared axial flow can heavily mitigate the Rayleigh-Taylor *** synergistic effect can compress the Rayleigh-Taylor instability to a narrow wave number *** with a sufficient gyroviscosity and large enough flow velocity,the synergistic effect can completely suppressed the Rayleigh-Taylor instability in whole wave number region.

关键词：雷利-泰勒不稳定性回转粘性内向爆炸等离子体箍缩增敏作用有限拉莫尔旋进半径增长比率

Intertidal area classification with generalized extreme value distribution and Markov random field in quad-polarimetric synthetic aperture radar imagery

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Frontiers of Information Technology & Electronic Engineering 2019年第2期20卷 253-264页

作者： Ting-ting JIN xiao-qiang SHE xiao-lan qiu Bin LEI Key Laboratory of Technology in Geo-spatial Information Processing and Application System Institute of ElectronicsChinese Academy of Sciences University of Chinese Academy of Sciences Huawei Software Technologies Co. Ltd.

Classification of intertidal area in synthetic aperture radar(SAR) images is an important yet challenging issue when considering the complicatedly and dramatically changing features of tidal fluctuation. The difficulty of intertidal area classification is compounded because a high proportion of this area is frequently flooded by water, making statistical modeling methods with spatial contextual information often ineffective. Because polarimetric entropy and anisotropy play significant roles in characterizing intertidal areas, in this paper we propose a novel unsupervised contextual classification algorithm. The key point of the method is to combine the generalized extreme value(GEV) statistical model of the polarization features and the Markov random field(MRF) for contextual smoothing. A goodness-of-fit test is added to determine the significance of the components of the statistical model. The final classification results are obtained by effectively combining the results of polarimetric entropy and anisotropy. Experimental results of the polarimetric data obtained by the Chinese Gaofen-3 SAR satellite demonstrate the feasibility and superiority of the proposed classification algorithm.

关键词： Intertidal classification Polarimetric synthetic aperture radar Finite mixture model Markov random field Generalized extreme value model

Pinches-Induced Transport Reduction in Reversed Shear/Optimized Shear Tokamak Plasmas

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Chinese Physics Letters 1999年第9期16卷 662-664页

作者： qiu xiao-ming WANG Ai-ke Southwestern Institute of Physics (P.O.Box 432)Chengdu 610041

The analytical formulas for anomalous particle and ion thermal diffusivities,Dte and xti,are derived on the basis of the two-fluid equations of our previous paper[***.15(1998)721].The two formulas involve five factors:(reversed/optimized)magnetic shear LB(r),E x B sheared velocity VE(r),where E is from the gradient of the ion pressure Pi,and the three ways of coupling between them,L-1B(dVE/dr),L-1B VE,and ***,where k is the LB-dependent *** is found that the five factors can produce turbulent particle-and heat-pinch,i.e.,Dte<0 and xti<0,in the core region of tokamaks,and hence the effective particle and ion thermal diffusivities,Deeff and xieff,reduce significantly in that *** numerical results for Deeff and xieff are in good agreement with experimental values.

关键词： Shear particle reversed

Model for Heat Pinch in Reversed Magnetic Shear Tokamak Plasmas

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Chinese Physics Letters 1998年第10期15卷 721-723页

作者： qiu xiao-ming WANG Ai-ke Southwestern Institute of Physics P.O.Box 432Chengdu 610041

A simple model is proposed to explain the recent experiment in TFTR and the more recent one in *** the model the significant reduction of effective thermal diffusivities of ions and electrons(xieff and xeeff)is attributed to the inward flows of drift wave energy,induced by the synergistic effects of the reversed magnetic shear and E X B velocity shear,where E is due to ion pressure *** results demonstrate the predictions of the present model,in particular,the numerical results for x_(i)^(eff) are in good agreement with experimental trents.

关键词： reversed Plasma synergistic

Drift Mode Growth Rate and Associated Ion Thermal Transport in Reversed Magnetic Shear Tokamak Plasma

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Chinese Physics Letters 2001年第5期18卷 650-652页

作者： WANG Ai-Ke qiu xiao-Ming Southwestern Institute of Physics P.O.Box 432Chengdu 610041

Drift mode linear growth rate and quasi-linear ion thermal transport in the reversed magnetic shear plasma are investigated by using the two-fluid theory,previously developed by Weiland and the Chalmers group[***,29(1989)1810;ibid.30(1990)983].The theory is here extended to including both the radial electrical field shear(d E_(r)/dr)and the electron fluid velocity(V_(e))in the sheared coordinate ***,Ve describes the coupling between the safety factor q and the E_(r) × B velocity *** influences on the growth rate and associated ion thermal transport are obtained numerically,In addition,the ion heat pinch in the reversed shear plasma is ***,the present conclusions are in good agreement with the experimental results.

关键词： reversed Shear theory

An effective snakebite first aid training method for medics in the Chinese troops: a RCT

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Military Medical Research 2020年第1期7卷 55-62页

作者： Chen qiu xiao-Feng qiu Jing-Jing Liu Yi-Xin Wang Li Gui First Medical Center General Hospital of the PLABeijing 100853China Department of Emergency Nursing School of NursingNaval Medical UniversityShanghai 200433China Second Medical Center General Hospital of the PLABeijing 100853China

Background:Snakebites can lead to lifelong consequences and is one of the main causes of death among military troops ***,few Chinese military medics know the proper first aid procedures for ***,this study aimed to explore the impact of the Standard Operation Procedure(SOP)and checklist on Chinese military medics’ability to manage snakebite first ***:This study was a prospective single-blind randomized controlled trial conducted in a military medical university of China from May to June 2017.A questionnaire-based survey was performed to collect the participants’socio-demographic profiles before the baseline *** the baseline measurement,participants were requested to provide corresponding first aid that was responsive to the simulative situation portrayed by the standardized patients(SPs)and the evaluators then scored their performances according to a checklist for snakebite first aid scoring *** the baseline measurement,they were randomly assigned to one of three intervention groups after stratification according to their baseline performance scores:group A received a self-learning course with textbooks(n=27),group B received a self-learning training on the SOP and checklist(n=27)and group C was engaged in an interactive discussion panel regarding the SOP and checklist(n=26).After the interventions,participants received outcome measurements about snakebite first aid key points capability from the same evaluator and SP for each group to avoid observational *** reviewers were blinded about the grouping in the ***:The baseline measurement yielded no significant difference(H=1.647,P=0.439)among the three *** post-intervention scores were higher than the pre-intervention scores for all three(A,B and C)groups(P=0.008,P<0.001 and P<0.001,respectively).There was significant difference of the post-intervention scores among the three groups(F=8.841,P<0.001).Both post-intervention scores of gro

关键词： Snakebite Standard operation procedure(SOP) Checklist Medic Training

Turning machining induced microstructural stability of a high Nb-containing TiAl alloy during high temperature exposure

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Rare Metals 2016年第1期35卷 77-84页

作者： Lu Fang Jun-Pin Lin xiao-Chan qiu Jin-xiao Ou Xian-Fei Ding State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing School of Architecture and Engineering Heilongjiang University National Center for Materials Service Safety University of Science and Technology Beijing

Turning machining induced microstructural instability was investigated in a fully lamellar Ti-45Al-8.5Nb-（W,B,Y） alloy during high temperature *** turning machining followed by thermal exposure at900 or 1000℃ for 100,300 and 500 h,a depth-dependent gradient microstructure with random orientations was produced in the region close to the machining *** typical layers,a fine-grained（FG） layer with equiaxed grains and a coarse-grained（CG） layer with elongated grains,are formed in this region in transversal *** thickness of the two layers is up to 120 urn after thermal exposure at 1000℃ for 500 h,which is less than the depth of the hardened region（200 μm） after turning *** of the new grains in FG and CG layers are constituted of γ single phase,while short α_2 segments and few B2 particles are precipitated at the γ/γ interface or inside the γ *** and phase boundary bulging are found to be the major mechanisms responsible for lamellar degradation in FG layer and CG layer,*** residual deformation energy stored is considered to be the main driving force of this process.

关键词： High Nb-containing TiAl alloy Residualdeformation energy Microstructural instability Recrystallization Phase transformation