查询词典 symmetry

This treatise set, forth the importance of symmetry principle in physical theoretical system from the high plane of methodology and discusses the dialetical relationship among symmetry,dynamical equations and conservation laws.

从方法论的高度阐述了对称性原理在物理学理论体系中的重要性，论述了对称性、动力学方程和守恒定律之间的辩证关系。

The principle of twin symmetry roll axle-mill was introduced.A new process was proposed which was for twin symmetry roll axial rolling passive spiral bevel gears.The deformation process by the new technology was analyzed by rigid plastic FEM software.Rolling force was calculated in theory.

介绍了对称双辊轴向轧机原理，提出了对称双辊轴向轧制成形螺旋锥齿轮新工艺，利用刚塑性有限元模拟软件对新工艺变形过程进行了仿真分析，对成形工艺力进行了理论计算。

The core of the debate between Latour and Bloor on the Strong Program was the confrontation of Bloor\'s symmetry principle of Strong Program and Latour\'s second symmetry principle. The essential disagreement between their theories was whether to insist the subject-object schema, or to discard it. Each of them adopted his own criterion of metaphysics and the different criteria resulted in two different kinds of relativisms. Both sides fell into the same philosophical dilemma. The debate between the post-SSK represented by Latour and the SSK represented by Collins and Yearley intensively revealed their disagreement in interior social construction, manifested by the opposition between social realism and ontology of nature-society mixture, between the normative method and descriptive method, between signified view of science and practical view of science, respectively.It is necessary to trace and clarify the core concepts of Latour\'s "Actor-Network Theory" such as "actor","network","agent", etc.

关于拉图尔和布鲁尔之间关于强纲领的论战，其核心是布鲁尔强纲领的对称性原则与拉图尔的普遍对称性原则之间的争论，二人理论的本质不同在于坚持还是消解主体-客体模式，由于所持不同的形而上学标准导致了两种不同的相对主义，而争论双方陷入了相同的哲学困境；关于以拉图尔为代表的后科学知识社会学与柯林斯和耶尔莱为代表的科学知识社会学之争，集中体现了社会建构内部间在本体论、认识论、科学观上的分歧，分别表现为：社会实在论与自然—社会混合本体论的对立、规范主义进路与描述主义进路的对立、表征科学观与实践科学观之间的对立。

Therewithal the symmetry about centrality had spontaneously breaken and had brought about the spacetime of multiverse, the mirror symmetry of CPT betweenthe universe of matter with antimatter centralized about The central black hole.

于是，中心对称自发破缺，产生正反物质世界以中心黑洞为中心的CPT镜面对称的多宇宙时空。

Therewithal the centric symmetry had spontaneously breaken and had brought about the spacetime of multiverse , which makes a feature of the mirror symmetry of CPT between the universes of matter with antimatter centralized about The central black hole .

于是，中心对称自发破缺，产生正反物质世界以中心黑洞为中心的CPT镜面对称的多宇宙时空。

The results of 3-D numerical modeling of the transversely isotropic media with horizontal symmetry axis and the orthorhombic symmetry media showed that quasi P wave,quasi-SV wave and quasi-SH wave occurred during elastic wave propagation in 3-D anisotropic media. Meanwhile, the special phenomena such as the S wave splitting, the blind zone of S wave splitting and quasi-SV wave-front triplication were clearly observed. In addition, the elastic wave-fronts are spatially changed, and the coupled relations among the quasi-P wave,quasi-SV wave and quasiSH wave in 3-D anisotropic media are very complex.

对方位各向异性介质模型和正交各向异性介质模型中弹性波的传播进行的三维数值模拟结果表明，弹性波在三维各向异性介质中传播时存在拟P波、拟SV波和拟SH波，并出现横波分裂、横波分裂盲区、波面三分叉等特殊现象，另外，性波场在空间是变化的，其拟P波、拟SV波和拟SH波的耦合关系比较复杂。

But according to principle of relativity and absolutization theory, the effort of super symmetry has no end, super symmetry demands the existence of gravity-微子 with spin 2/3 except gravity-quantum.

但是根据对称的相对性与绝对性原理，超对称的工作是没有止境的。超对称要求除引力子外，还应当有自旋3/2的引力微子存在，但是实验上并没有发现它的存在。

In contrast with the detected space group of the crystal, the newly discovered ditrigonal scalenohedral negative crystal inclusions showed the m symmetry of the crystal with space group symmetry R 3c.

晶体中发现复三方偏三角面体的负晶包裹体，其宏观对称属3m，它与空间群R3c相对应，但与测出晶体结构的空间群有矛盾。X射线结构测定已否定了其空间群为R3m的看法。

The main idea is to lift the band degeneracy at high symmetry points in the Brillouin zone of crystals by lowering the structure symmetry of crystal. One way is introducing nonspherical atom configurations, another is introducing anisotropy in atom dielectricity.

设计的核心思想是通过降低光子晶体结构的对称性，消除光子能带在晶体的布里渊区高对称点上的本征简并，以获得完全的带隙我们采用两种方法，一种是将晶体的原子做成非球对称，另一种用各向异性的颗粒球做晶体原子。

The main idea is tolift the band degeneracy at high symmetry points in the Brillouin zone of crystals bylowering the structure symmetry of crystal.One way is introducing nonspherical atomconfigurations,another is introducing anisotropy in atom dielectricity.

设计的核心思想是通过降低光子晶体结构的对称性，消除光子能带在晶体的布里渊区高对称点上的本征简并，以获得完全的带稀我们采用两种方法，一种是将晶体的原子做成非球对称，另一种用各向异性的颗粒球做晶体原子。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。