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Structural behavior and metallization of AsSbS_(3) at high pressure
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作者 Tian Qin Min Wu +2 位作者 Kai Wang Ye Wu Haijun Huang 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第11期436-440,共5页
The group V–VI semiconductor material getchellite (crystalline AsSbS_(3)) has garnered extensive attention due to itswonderful electronic and optical properties. The pressure engineering is one of the most effective ... The group V–VI semiconductor material getchellite (crystalline AsSbS_(3)) has garnered extensive attention due to itswonderful electronic and optical properties. The pressure engineering is one of the most effective methods to modulatecrystal structure and physical properties of semiconductor materials. In this study, the structural behavior, optical and electricalproperties of AsSbS_(3) under high pressure have been investigated systematically by in situ high-pressure experimentsfor the first time. The monoclinic structure of AsSbS_(3) remains stable up to 47.0 GPa without phase transition. The graduallattice contraction with increasing pressure results in a continuous narrowing of the bandgap then leads to pressure-inducedmetallization of AsSbS_(3) at 31.5 GPa. Our research presents a high-pressure strategy for tuning the crystal structure andphysical properties of AsSbS_(3) to expand its potential applications in electronic and optoelectronic fields. 展开更多
关键词 AsSbS_(3) structural behavior pressure-induced metallization high pressure
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The Effect of Core Eccentricity on the Structural Behavior of Concrete Tall Buildings
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作者 Tarek Anwar Taha Awida 《Journal of Civil Engineering and Architecture》 2024年第3期112-117,共6页
The main purpose of this paper is to investigate the effect of core eccentricity on the structural behavior of concrete tall buildings.Concrete buildings of 55 floors with plan dimensions 48.0×48.0 m2 were invest... The main purpose of this paper is to investigate the effect of core eccentricity on the structural behavior of concrete tall buildings.Concrete buildings of 55 floors with plan dimensions 48.0×48.0 m2 were investigated.Three cases of main core locations are studied:centric(A),eccentric by one sixth(B)and one third(C)of building width.The three-dimensional finite element method has been used in conducting structural analysis through ETABS software.Gravity and lateral(wind and seismic)loadings are applied to all building cases.It has been concluded that the core location is the prime parameter governing the structural behavior of tall buildings.Although the first two cases(A,B)have acceptable and similar structural behaviors conforming to code limits,in the third case(C),the building behavior came beyond code limits.The author introduced remedial action by adding two secondary cores in the opposite direction of the main core(C-R)to restore the building behavior to the code limits.The results of this action were satisfactory. 展开更多
关键词 Concrete tall buildings core eccentricity structural behavior GRAVITY WIND seismic loadings
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Structure,Properties and Behavior of Kyanite:Use in Refractory Monolithics 被引量:4
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作者 Musa Karakus Robert Moore 《China's Refractories》 CAS 2003年第3期3-6,共4页
1 Introduction Kyanite is an important naturally occurring in-dustrial mineral and is used in the manufacture of avariety of industrial ceramic products; notable exam-ples include refractories and porcelains. It is a ... 1 Introduction Kyanite is an important naturally occurring in-dustrial mineral and is used in the manufacture of avariety of industrial ceramic products; notable exam-ples include refractories and porcelains. It is a high-pressure polymorph of the aluminosilicates of the ne-sosilicate group, which includes kyanite, sillimanite,and andalusite. These three aluminous or alumina-rich minerals are chemically identical with the compo-sition, Al;SiO;, but have different crystal structuresand physical properties. It is, however, their alumina 展开更多
关键词 of it or on structure Properties and Behavior of Kyanite in
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Aggregation Behavior and Structure of Associated Polyacrylamide Hydrophobically Modified with 2-Phenoxylethylacrylate 被引量:1
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作者 DAI Yu-hua WU Fei-peng +1 位作者 LI Miao-zhen WANG Er-jian 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2009年第6期957-962,共6页
The aggregation behavior and structure of hydrophobically modified block copolymers of acrylamide and 2-phenoxylethylacrylate were investigated by viscometry, 1H NMR relaxation, 2D NOESY, fluorescence and dynamic ligh... The aggregation behavior and structure of hydrophobically modified block copolymers of acrylamide and 2-phenoxylethylacrylate were investigated by viscometry, 1H NMR relaxation, 2D NOESY, fluorescence and dynamic light scattering. It Was found that the aggregation behavior was strongly dependent on the concentration of polymer solution and the hydrophobe contents. With varying concentration from 2.0, 6.0, 8.0 to 12.0 g/L, there were different aggregate morphologies distributed in aqueous solutions, such as monopolymer chain, micelle-like aggregate, multi-micelle aggregate and cross-linked network. According to the model of aggregation, it can give a reasonable explanation on the large magnitude enhancement of viscosity with the increasing of polymer concentration. Additional data of 2D NOESY and fluorescence show that the copolymer with higher hydrophobe content(molar fraction≥ 1%) is likely to form intra-molecular association. 展开更多
关键词 Aggregation behavior and structure Hydrophobically modified Copolymer P(AM/POEA)
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Editorial: Special subject on the mechanical behavior of thermal protection materials and structures 被引量:2
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作者 Songhe Meng Huimin Xie 《Theoretical & Applied Mechanics Letters》 CAS 2014年第2期17-18,共2页
The thermal protection materials and structures are widely used in hypersonic vehicles for the purpose of thermal insulation, and their mechanical behavior is one of the key issues in design and manufacture of hyperso... The thermal protection materials and structures are widely used in hypersonic vehicles for the purpose of thermal insulation, and their mechanical behavior is one of the key issues in design and manufacture of hypersonic vehicles. It is our great pleasure to present the seven papers in this special subject of Theoretical & Applied Mechanics Letters (TAML) and introduce the recent progresses on the mechanical behavior of thermal protection materials and structures by the authors. 展开更多
关键词 SIC Special subject on the mechanical behavior of thermal protection materials and structures EDITORIAL
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Full-range nonlinear analysis of fatigue behaviors of reinforced concrete structures by finite element method 被引量:1
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作者 Song Yupu Zhao Shunbo Wang Ruimin and Li Shuyao 《Acta Oceanologica Sinica》 SCIE CAS CSCD 1994年第1期143-154,共12页
The offshore reinforced concrete structures are always subject to cyclic load, such as wave load.In this paper a new finite element analysis model is developed to analyze the stress and strain state of reinforced conc... The offshore reinforced concrete structures are always subject to cyclic load, such as wave load.In this paper a new finite element analysis model is developed to analyze the stress and strain state of reinforced concrete structures including offshore concrete structures, subject to any number of the cyclic load. On the basis of the anal ysis of the experimental data,this model simplifies the number of cycles-total cyclic strain curve of concrete as three straight line segments,and it is assumed that the stress-strain curves of different cycles in each segment are the same, thus the elastoplastic analysis is only needed for the first cycle of each segment, and the stress or strain corresponding to any number of cycles can be obtained by superposition of stress or strain obtained by the above e lastoplastic analysis based on the cyclic numbers in each segment.This model spends less computer time,and can obtain the stress and strain states of the structures after any number of cycles.The endochronic-damage and ideal offshore concrete platform subject to cyclic loading are experimented and analyzed by the finite element method based on the model proposed in this paper. The results between the experiment and the finite element analysis are in good agreement,which demonstrates the validity and accuracy of the proposed model. 展开更多
关键词 Reinforced concrete structures fatigue behavior full-range nonlinear analysis finite element method
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Electronic Structures and Alloying Behaviors of Ferrite Phases in High Co-Ni Secondary Hardened Martensitic Steels 被引量:1
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作者 Guoying ZHANG+ and Meiguang ZENG (Northeastern University, Shenyang 110006, China) Guili LIU (Shenyang Polytechnic Universityt Shenyang 110023, China) 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2000年第5期495-498,共4页
The electronic structure of ferrite (tempered martensite phase) in high Co-Ni secondary hardened martensitic steel has been investigated. The local density of states (LOOS) of alloying elements in the steel displays t... The electronic structure of ferrite (tempered martensite phase) in high Co-Ni secondary hardened martensitic steel has been investigated. The local density of states (LOOS) of alloying elements in the steel displays the relationship between solid solubility and the shape of the LDOS. The bond order integral (BOI) between atoms in the steel shows that the directional bonding of the p orbital of Si or C leads to the brittleness of the steel. At last, ΣBOI between atoms demonstrate that C, Co, Mn, Cr, Mo, Si strengthen the alloyed steel through solid-solution effects. 展开更多
关键词 Electronic structures and Alloying Behaviors of Ferrite Phases in High Co-Ni Secondary Hardened Martensitic Steels NI
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DYNAMIC BEHAVIOR ANALYSIS OF VISCOELASTICALLY DAMPED STRUCTURES
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《Chinese Journal of Aeronautics》 SCIE EI CAS 1988年第2期110-116,共7页
Analysis method for the dynamic behavior of viscoelastically damped structures is studied.A finite element model of sandwich beams with eight degrees of freedom is set up and the finite element formulation of the equa... Analysis method for the dynamic behavior of viscoelastically damped structures is studied.A finite element model of sandwich beams with eight degrees of freedom is set up and the finite element formulation of the equations of motion is given for the viscoelastically damped structures.An iteration method for solving nonlinear eigenvalue problems is suggested to analyze the dynamic behavior of viscoelastically damped structures. The method has been applied to the complex model analysis of a sandwich cantilever beam with viscoelastic damping material core. 展开更多
关键词 DYNAMIC BEHAVIOR ANALYSIS OF VISCOELASTICALLY DAMPED structureS CHEN
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Memory Behaviors Based on ITO/Graphene Oxide/Al Structure
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作者 仪明东 郭佳林 +4 位作者 胡波 夏先海 范曲立 解令海 黄维 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第7期138-141,共4页
We investigate the memory properties of the ITO/graphene oxide/Al diodes. It is found that the devices show different memory behaviors with the diverse geometry and thickness of Al. When the thickness of the Al electr... We investigate the memory properties of the ITO/graphene oxide/Al diodes. It is found that the devices show different memory behaviors with the diverse geometry and thickness of Al. When the thickness of the Al electrode is relatively thick, the device of the cross-point Al electrode shows a three-level memory effect, and the counterpart device of the cross-bar Al electrode exhibits a volatile static random access memory effect. When the thickness of the AI electrode is thinner, the above devices demonstrate a flash memory effect. The different memory behaviors of ITO/GO/AI diodes are ascribed to the mode and degree of reduction and oxidation of GO. 展开更多
关键词 GO Memory Behaviors Based on ITO/Graphene Oxide/Al structure ITO AL
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Synthesis,Crystal Structure and Magnetic Behavior of a Novel Cd(Ⅱ) Complex with Four Nitroxide Radicals
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作者 GAO Dong-zhao ZHANG Guo-ying XU Yan-yan SUN Ya-qiu 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2010年第2期170-173,共4页
A novel diamagnetic-metal Cd(Ⅱ) complex with four nitroxide radicals[Cd(IM4Py)4Cl2](IM4Py=2-(4'-pyridinyl)-4,4,5,5-tetramethylimidazoline-1-oxyl) was synthesized and characterized by elemental analyses,IR sp... A novel diamagnetic-metal Cd(Ⅱ) complex with four nitroxide radicals[Cd(IM4Py)4Cl2](IM4Py=2-(4'-pyridinyl)-4,4,5,5-tetramethylimidazoline-1-oxyl) was synthesized and characterized by elemental analyses,IR spectra,UV-Vis spectra and X-ray single crystal diffraction.The complex crystallized in triclinic space group P1 with a=0.93285(14) nm,b=1.16827(18) nm,c=1.3660(2) nm,α=112.759(2)°,β=104.524(2)°,γ=92.008(3)°,V= 1.3143(3) nm3,Z=1,Dc=1.335 g/cm3,the final R1=0.0423 and wR2=0.1009.In the title complex,each Cd(Ⅱ) ion adopting a distorted octahedral geometry is coordinated by two Cl-anions and four pyridyl-N atoms from four IM4Py ligands.The magnetic measurements show the weak antiferromagnetic interactions between the nitroxide radicals. 展开更多
关键词 Cd(Ⅱ) complex Nitroxide radical Crystal structure Magnetic behavior
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Impact Analysis of Fluid-structure Coupling Embedded Weapon Bay
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作者 FENG Ruoqi CHEN Xuemei +1 位作者 PU Keqiang XIONG Qinlin 《International Journal of Plant Engineering and Management》 2021年第2期89-105,共17页
The coupling behavior of the imbedded weapon store occurring between the local unsteady flow field round the store and the structure response on the processing of opening its bay-door is simulated by using numerical m... The coupling behavior of the imbedded weapon store occurring between the local unsteady flow field round the store and the structure response on the processing of opening its bay-door is simulated by using numerical method based on computational fluid mechanics(CFD).The transient aerodynamic behaviors when opening door under various flight altitudes and the corresponding structure deformation evolution in the unsteady flow fields are analyzed respectively and presented.The rules of aircraft attitude parameters′impacting to the responses of structure and the bay-door′s opening process are obtained by comparing with the analysis results.These rules can be applied to the structure design of bay-door and route specification of missile when disengaged and launched from within store. 展开更多
关键词 embedded weapon store CFD numerical simulation unsteady air flow and structure coupling aerodynamic characteristics analysis structure behavior analysis
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A New Approach to Analyzing Behavioral Change Propagation in Redesigning of Drone Camera Stabilizer
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作者 Hamid Reza Moghadas Najaf Abad Ali Mahmoodi Farshad Pazooki 《Engineering(科研)》 2021年第12期707-738,共32页
Redesigning of complex products is not an easy task. Engineering change requirements can be extracted at any stage of the product redesign process, and it makes the management of engineering change become a challengin... Redesigning of complex products is not an easy task. Engineering change requirements can be extracted at any stage of the product redesign process, and it makes the management of engineering change become a challenging mission. The motivation for this study is to find the shortest path of behavioral change propagation (BCP), minimize the BCP, access to the special behavioral elements in order to better managing the BCP and classifying the behavioral attribute of the elements in terms of their relationship to change by betweenness centrality coefficient (BNCC), clustering coefficient (CLC), reachability coefficient (RC) and change propagation index (CPI). In this article, the procedure of managerial decision-making is proposed by combining system restrictions in behavioral clustering design structure matrix (BCDSM) with optimization algorithms. The practicality of suggested method is verified in redesign procedure of a phantom drone camera stabilizer as a case study. The results, indicate that the absorption of change by behavioral elements is dominant in the mechanical (63.9%), electrical (61.1%) and thermal (38.9%) behaviors of the drone camera stabilizer system in redesign process. These elements are best candidates for reducing the cost and time of behavioral changes in the system redesign and are desirable for the designer. 展开更多
关键词 behavioral Change Propagation behavioral Clustering Design structure Matrix Drone Camera Stabilizer
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Analysis of the Longitudinal Structure Function F_L from the Non-linear Regge Gluon Density Behavior at Low-x
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作者 BOROUN G.R. REZAEI B. 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第11期18-21,共4页
The longitudinal structure function with shadowing correction according to the nonlinear effects of the gluon density behavior at low x is considered. The solution of the GLR-MQ evolution equation for the gluon densit... The longitudinal structure function with shadowing correction according to the nonlinear effects of the gluon density behavior at low x is considered. The solution of the GLR-MQ evolution equation for the gluon density shows that the FL^g(x, Q2) behavior can be tamed by the singularity at low x values. Comparing our results with H1 data at R=4 GeV-1 shows that at very low x this behavior is completely tamed by taking shadowing correction into account. 展开更多
关键词 Analysis of the Longitudinal structure Function F_L from the Non-linear Regge Gluon Density Behavior at Low-x
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HYDROPHOBICALLY ASSOCIATING POLYACRYLAMIDES MODIFIED BY A NOVEL SELF-ASSOCIATIVE CATIONIC MONOMER 被引量:2
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作者 吴飞鹏 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2010年第2期137-145,共9页
A series of hydrophobically associating polyacrylamides modified by small amounts (〈 3 mol%) of a self- associative cationic monomer 4-(2-(acryloyloxy) ethoxy) benzyl tri-ethyl ammonium bromide (AEBA) as hydr... A series of hydrophobically associating polyacrylamides modified by small amounts (〈 3 mol%) of a self- associative cationic monomer 4-(2-(acryloyloxy) ethoxy) benzyl tri-ethyl ammonium bromide (AEBA) as hydrophobe were synthesized by radical copolymerization in aqueous solutions without external surfactants. The resulting eopolymers containing a multiblock structure exhibited a high tendency for hydrophobic association and a high thickening capacity. Solution properties and aggregation structures were investigated by viscometry and fluorescence technique. The high viscosity enhancement was found as the polymer concentration beyond a critical value c* and strongly depended on the copolymer microstructures. The number and length of hydrophobic microblocks within the copolymer backbones could be controlled by changing the AEBA concentration in copolymerization system. Addition of salt induced more hydrophobic association and viscosity enhancement. The synthesis method used was simple and environmentally friendly without any external surfactant contamination in comparison with the conventional micellar copolymerization. 展开更多
关键词 Self-associative monomer Hydrophobically associating copolymer Aggregation behavior and structure Viscosity enhancement.
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Structural first failure times under non-Gaussian stochastic behavior 被引量:1
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作者 何军 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2007年第11期1487-1494,共8页
An analytical moment-based method for calculating structuralfirst failure times under non-Gaussian stochastic behavior is proposed. In the method, a power series that constants can be obtained from response moments (... An analytical moment-based method for calculating structuralfirst failure times under non-Gaussian stochastic behavior is proposed. In the method, a power series that constants can be obtained from response moments (skewness, kurtosis, etc.) is used firstly to map a non-Gaussian structural response into a standard Gaussian process, then mean up-crossing rates, mean clump size and the initial passage probability of a critical barrier level by the original structural response are estimated, and finally, the formula for calculating first failure times is established on the assur^ption that corrected up-crossing rates are independent. An analysis of a nonlinear single-degree-of-freedom dynamical system excited by a Gaussian model of load not only demonstrates the usage of the proposed method but also shows the accuracy and efficiency of the proposed method by comparisons between the present method and other methods such as Monte Carlo simulation and the traditional Gaussian model. 展开更多
关键词 first failure times non-Gaussian structural behavior up-crossing rates power series
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Deformation Behavior and Formability of Gradient Nano-grained AISI 304 Stainless Steel Processed by Ultrasonic Impact Treatment 被引量:3
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作者 杨新俊 LING Xiang +1 位作者 WANG Dongxiang 王伟 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2017年第5期1147-1155,共9页
The deformation behavior and formability of gradient nano-grained(GNG) AISI 304 stainless steel in uniaxial and biaxial states were investigated by means of tensile test and small punch test(SPT). The GNG top laye... The deformation behavior and formability of gradient nano-grained(GNG) AISI 304 stainless steel in uniaxial and biaxial states were investigated by means of tensile test and small punch test(SPT). The GNG top layer was fabricated on coarse grains(CG) AISI 304 by ultrasonic impact treatment. The results showed that the CG substrate could effectively suppress the strain localization of NC in GNG layer, and an approximate linear relationship existed between the thickness of substrate(h) and uniform true strain before necking(ε_(unif)). Grain growth of NC was observed at the stress state with high Stress triaxiality T, which led to better ductility of GNG/CG 304 in SPT, as well as similar true strain after the onset of necking(ε_(neck)) compared with coarse 304 in tensile test. Ei-values of GNG/CG 304 with different structures were nearly the same at different punch speeds, and good formability of GNG/CG 304 was demonstrated. However, punch speed and microstructure needed to be optimized to avoid much lost of membrane strain region in biaxial stress state. 展开更多
关键词 gradient nano-grained structure deformation behavior formability ultrasonic impact treatment AISI 304 stainless steel
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Research on key technologies in design of middle pylon of Taizhou Bridge 被引量:1
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作者 Ji Lin 《Engineering Sciences》 EI 2012年第3期2-7,共6页
At the middle pylon of a three-pylon two-span suspension bridge, the effect of unbalanced loads on the adjacent spans may result in a series of technical bottlenecks in design, such as stability and anti-slippage betw... At the middle pylon of a three-pylon two-span suspension bridge, the effect of unbalanced loads on the adjacent spans may result in a series of technical bottlenecks in design, such as stability and anti-slippage between saddles and main cables. This article presents the researches conducted on structure selection and behavior characteristics of middle pylon, interaction mechanism between main cables and saddles and their anti-slippage safety performance, elastic and plastic stability analysis and safety assessment of steel middle pylon, and fatigue design load and method for steel pylon of Taizhou Bridge. According to the research results, a longitudinal inverted Y shape steel middle pylon is used in design, effectively solving many technical difficulties, and this type of pylon has become a suitable middle pylon structural form for many three-ovlon two-soan susoension bridges. 展开更多
关键词 three-pylon two-span suspension bridge structural behavior and selection elastic and plastic stability main cable and saddle anti-slippage
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Attitudes Toward Dysfunctional Audit Behavior: The Effect of Budget Emphasis, Leadership Behavior, and Effectiveness of Audit Review
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作者 Halil Paino Azlan Thani Syed Iskandar Zulkarnain Syid Idris 《Journal of Modern Accounting and Auditing》 2011年第12期1344-1351,共8页
Dysfunctional audit behavior (DAB) is an accepted problem, associated with decreased audit quality. This study develops and tests a theoretical model that identifies factors contributing to DAB. Budget emphasis, lea... Dysfunctional audit behavior (DAB) is an accepted problem, associated with decreased audit quality. This study develops and tests a theoretical model that identifies factors contributing to DAB. Budget emphasis, leadership behavior structure and consideration, and effectiveness of audit review were examined as antecedents of attitudes toward DAB. The findings produced consistent evidence in support of the theoretical model. It is not an emphasis on meeting budgets that leads to undesirable behavior, but contextual variables, such as leadership behavior structure and effectiveness of audit review. 展开更多
关键词 attitudes towards dysfunctional audit behavior budget emphasis leadership behavior structure andconsideration audit review
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Structural Response of Unreinforced Masonry Walls
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作者 Nelson Dario Aguera Miguel Eduardo Tomello Carlos Daniel Frau 《Journal of Civil Engineering and Architecture》 2016年第2期219-231,共13页
Historical buildings located in seismic regions have URM (unreinforced masonry) walls of considerable width as their main structure. In order to study the structural response of such type of masonry, it is necessary... Historical buildings located in seismic regions have URM (unreinforced masonry) walls of considerable width as their main structure. In order to study the structural response of such type of masonry, it is necessary to know its mechanical and elastic characteristics. For such purpose, it is generally necessary to perform destructive and non-destructive tests. Other procedures, such as the study of masonry through numerical models, would make it possible to predict, with close approximation, the response of masonry to different actions. The purpose of this paper is to evaluate the behavior of URM walls subjected to axial and horizontal load by using a finite element model with the Abaqus code. Constitutive laws of materials, bricks and mortar are defined, using two constitutive models of plasticity and damage included in the materials library. The constitutive models used employ information of experimental tests performed on bricks and mortar. The results of an analysis for an URM wall subjected to axial and horizontal load are presented. Responses of walls were obtained in terms of load versus displacement for different constitutive models and for different qualities of bricks and mortar. The two constitutive models used show similar results, particularly in the response waveforms. However, the ultimate capacity values show mean variations of around 30%. The two constitutive models display high dependence upon the mechanical characteristics of bricks and mortar. 展开更多
关键词 MASONRY structural behavior piles.
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Electronic structure and catalytic behavior of tungsten carbides
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作者 QIN,Dai-Yi FAN,Kang-Nian GAO,Zi Department of Chemistry,Fadan University,Shanghai 200433 《Chinese Journal of Chemistry》 SCIE CAS CSCD 1991年第2期97-101,共0页
The electronic structure of tungsten carbide was investigated by EHMO semiempirical me- thod.The most stable structure of the carbide was predicted on the basis of binding energy calcula- tions.The W-C bonding is cova... The electronic structure of tungsten carbide was investigated by EHMO semiempirical me- thod.The most stable structure of the carbide was predicted on the basis of binding energy calcula- tions.The W-C bonding is covalent in nature with some charge transfer from the W to the C atoms. The increase in the occupancy of the d shell of the W atoms and the position of the Fermi level may account for the platinum-like catalytic behavior of tungsten carbide. 展开更多
关键词 Electronic structure and catalytic behavior of tungsten carbides PT
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