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浅析结构主义语言学视角下俄语词汇的系统性 被引量:1
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作者 兰昊 《山东农业工程学院学报》 2017年第5期155-159,共5页
结构主义语言学的结构指的就是索绪尔提出的系统。本文的目的在于从词汇语义系统的内部规律出发,研究结构主义框架下俄语词汇系统中词与词之间的关系。主要从词汇的聚合关系、组合关系和变体关系等方面进行分析,力图全面阐释俄语词汇的... 结构主义语言学的结构指的就是索绪尔提出的系统。本文的目的在于从词汇语义系统的内部规律出发,研究结构主义框架下俄语词汇系统中词与词之间的关系。主要从词汇的聚合关系、组合关系和变体关系等方面进行分析,力图全面阐释俄语词汇的系统性。 展开更多
关键词 结构主义 词汇的系统性 聚合关系 组合关系 变体关系
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加筋碎石土的抗剪强度特性研究 被引量:4
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作者 黄英 保华富 《大坝观测与土工测试》 2000年第5期44-47,共4页
通过对比分析碎石土加筋前后高压大三轴饱和固结排水试验结果 ,研究碎石土加筋的抗剪强度特性。结果表明 :加筋碎石土复合体的应力 -应变 -体变关系仍然表现出不加筋碎石土的基本特性 ,加筋后的应力 -应变 -体变曲线比不加筋前显著提高 ... 通过对比分析碎石土加筋前后高压大三轴饱和固结排水试验结果 ,研究碎石土加筋的抗剪强度特性。结果表明 :加筋碎石土复合体的应力 -应变 -体变关系仍然表现出不加筋碎石土的基本特性 ,加筋后的应力 -应变 -体变曲线比不加筋前显著提高 ,其本构关系可用邓肯 -张双曲线模型来描述。不论加筋与否 ,碎石土的加卸荷循环曲线基本都呈相互平行的直线。加筋增强了碎石土抵抗变形和破坏的能力 ,碎石土加筋的效果可以显著提高凝聚力 ,但对其内摩擦角影响很小。颗粒越粗硬 ,对提高强度、减小变形越有利。 展开更多
关键词 加筋碎石土 应力-应-关系 抗剪强度
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Particle characteristics and rheological constitutive relations of high concentration red mud 被引量:10
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作者 WANG Xing QU Yuan-yuan +3 位作者 HU Wei-wei CHEN Jie ZHAO Xue-yi WU Miao 《Journal of China University of Mining and Technology》 EI 2008年第2期266-270,共5页
Red mud has relatively small solid particles (d50= 13.02 μm) and will flow in paste form under high pressure during pipeline transport. Red mud belongs to a two-phase flow of materials with high viscosity and a hig... Red mud has relatively small solid particles (d50= 13.02 μm) and will flow in paste form under high pressure during pipeline transport. Red mud belongs to a two-phase flow of materials with high viscosity and a high concentration of non-sedimentation, homogeneous solid-liquids. It is difficult to test its rheological properties under atmospheric pressure. Measurements such as rotational viscometry can not reflect the real state of the material when it is flowing in a pipe. Tested rheological parameters are somewhat higher than the actual values. In our investigation, grain shape, distinctive modality and grain size distribution of red mud were tested. Based on the principle of tube measurement, rheological experiments on red mud at different concentrations were carried out by using our independently developed tube-type pressure theology test facility, and obtained constitutive equations. We conclude that red mud behaves as non-Newtonian pseudo-plastic fluid in pipe flows. Its consistency and power-law indices vary considerably with different concentrations. 展开更多
关键词 high concentration non-Newtonian fluid rheological constitutive relations red mud tube-pipe flow method tube-type pressure rheology test facility
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Effect of jet milling on micro-strain behavior and rupture behavior of agglomerates of ultrafine WC powders 被引量:7
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作者 Ya-li SUN Qing-cai LIU +3 位作者 Xin HUANG Fa-xing ZHANG Jian YANG Hua MEI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2019年第10期2128-2140,共13页
The Williamson-Hall and uniaxial compression methods were used to study the variations of the micro-strain and stress-strain relations in WC powders after jet milling and ball milling, respectively. The rupture behavi... The Williamson-Hall and uniaxial compression methods were used to study the variations of the micro-strain and stress-strain relations in WC powders after jet milling and ball milling, respectively. The rupture behavior of agglomerates in WC powders was investigated. Meanwhile, the as-obtained WC powders treated by different milling methods were used to fabricate WC-10%Co cemented carbides, followed by the performance assessment of cemented carbides. The results show that the micro-strain of the jet-milled WC powders decreases significantly compared with that of the ball-milled WC powders, and that the cemented carbides prepared by jet-milled WC powders exhibit excellent properties with a transverse-rupture strength of 4260 MPa, due to the elimination of agglomerates and the reduction of lattice strain. 展开更多
关键词 ultrafine WC powder micro-strain stress-strain relation jet milling agglomerate rupture mechanism
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Correlation of Critical Loci for Water-Hydrocarbon Binary Systems by EOS Based on the Multi-Fluid Nonrandom Lattice Theory
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作者 Hun Yong SHIN Hwayong KIMb +3 位作者 Ki-Pung YOO Chul-Soo LEEd Yoshio IWAI Yasuhiko ARAI 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2002年第6期661-665,共5页
Quantitative representation of complicated behavior of fluid mixtures in the critical region by any of equation-of-state theories re-mains as a difficult thermodynamic topics to date. In the present work, a computatio... Quantitative representation of complicated behavior of fluid mixtures in the critical region by any of equation-of-state theories re-mains as a difficult thermodynamic topics to date. In the present work, a computational efforts were made for representing various types of critical loci of binary water with hydrocarbon systems showing Type II and Type III phase behavior by an elementary equation of state [called multi-fluid nonrandom lattice fluid EOS (MF-NLF EOS)] based on the lattice statistical mechanical theory. The model EOS requires two mo-lecular parameters which representing molecular size and interaction energy for a pure component and single adjustable interaction energy pa-rameter for binary mixtures. Critical temperature and pressure data were used to obtain molecular size parameter and vapor pressure data were used to obtain interaction energy parameter. The MF-NLF EOS model adapted in the present study correlated quantitatively well the critical loci of various binary water with hydrocarbon systems. 展开更多
关键词 critical locus WATER HYDROCARBON lattice theory multi-fluid theory*
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A new rhombohedral phase and its 48 variants inβtitanium alloy
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作者 Xin-nan WANG Ming HAN +2 位作者 Fu-rong ZHANG Guang-ming ZHAO Zhi-shou ZHU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS 2024年第9期2849-2863,共15页
A new rhombohedral phase(termed R′)in a solution-aging-treated titanium alloy(Ti-4.5Al-6.5Mo-2Cr-2Nb-1V-1Sn-1Zr,wt.%)was identified.Its accurate Bravais lattice parameters were determined by a novel unit cell reconst... A new rhombohedral phase(termed R′)in a solution-aging-treated titanium alloy(Ti-4.5Al-6.5Mo-2Cr-2Nb-1V-1Sn-1Zr,wt.%)was identified.Its accurate Bravais lattice parameters were determined by a novel unit cell reconstruction method based on conventional selected-area electron diffraction(SAED)technique.The orientation relationship between R'phase and BCC phase was revealed.The results show that the R′phase is found to have 48crystallographically equivalent variants,resulting in rather complicated SAED patterns with high-order reflections.A series of in-situ SAED patterns were taken along both low-and high-index zone axes,and all weak and strong reflections arising from the 48 variants were properly explained and directly assigned with self-consistent Miller indices,confirming the presence of the rhombohedral phase.Additionally,some criteria were also proposed for evaluating the indexed results,which together with the Bravais lattice reconstruction method shed light on the microstructure characterization of even unknown phases in other alloys. 展开更多
关键词 titanium alloy rhombohedral phase Bravais lattice reconstruction variant orientation relationship
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Seasonal and inter-annual variation of surface roughness length and bulk transfer coefficients in a semiarid area 被引量:11
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作者 FENG JianWu LIU HuiZhi +2 位作者 WANG Lei DU Qun SHI LiQing 《Science China Earth Sciences》 SCIE EI CAS 2012年第2期254-261,共8页
Here we report a multiyear study on the surface roughness length and bulk transfer coefficients over the degraded grassland and cropland surfaces in a semiarid area of China. Eddy covariance measurement and the meteor... Here we report a multiyear study on the surface roughness length and bulk transfer coefficients over the degraded grassland and cropland surfaces in a semiarid area of China. Eddy covariance measurement and the meteorological profile observation data were used to analyze characteristics of these parameters on the diurnal, seasonal, and annual scales. Significant seasonal and annual variations of the aerodynamic roughness length are observed over the two surfaces. A large variation of kB-1 is measured during the day. Both kB-1 and the bulk transfer coefficients exhibit significant seasonal and annual variations. During the growing season (May to October), average Cd and Ch are 3.1×10-3 and 2.5×10-3 over the degrade grassland surface, and 4.7×10-3 and 3.1×10-3 over the cropland surface respectively. During the non-growing season, average Cd and Ch are 2.3×10-3 and 2.0×10-3 over the degrade grassland surface, and 2.9×10-3 and 2.2×10-3 over the cropland surface respectively. 展开更多
关键词 semiarid area surface roughness length bulk transfer coefficients eddy covariance method
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The design, synthesis and α7 nicotinic acetylcholine receptors positive allosteric modulative evaluation of 3H-quinazolin-4-one derivatives 被引量:1
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作者 Zongze Huang Xintong Wang +5 位作者 Ying Meng Xin Li Haoran Xiao Xiling Bian KeWei Wang Qi Sun 《Journal of Chinese Pharmaceutical Sciences》 CAS CSCD 2018年第8期540-552,共13页
A series of new 6-substituted 3 H-quinazolin-4-ones(3 a-3 d) were designed, synthesized and evaluated as the type I positive allosteric modulators(PAMs) of human α7 n ACh R expressed in Xenopus ooctyes by two-ele... A series of new 6-substituted 3 H-quinazolin-4-ones(3 a-3 d) were designed, synthesized and evaluated as the type I positive allosteric modulators(PAMs) of human α7 n ACh R expressed in Xenopus ooctyes by two-electrode voltage clamp. However, no compound showed a better efficacious PAM than lead compound 2 in the presence of acetylcholine(100 μM). The structure-activity relationship(SAR) analysis suggested that thiazolo[4,5-d]pyrimidin-7(6 H)-one was the key biological skeleton. 展开更多
关键词 3H-Quinazolin-4-ones α7 nAChR Positive allosteric modulators Structure-activity relationship Schizophrenia disease
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