查询词典 enveloping

Based on the filtered Lie algebra of the universal enveloping algebra, the algebraic structure of projected subsystems are studied. It is proved that they have simple decompositions, and the construction of the representations is given as well as the corresponding criterion for project limit controllability.

基于泛包络代数的滤李代数结构，研究了投影子系统的代数结构，证明它们具有简单的分解形式，并给出了它们的表示的构造方法和投影极限能控性的判别定理。

Seeds 1 to several, typically 2 developing, ellipsoid; aril basal to enveloping seed.

种子1对数个，通常2 发展，椭圆体的；假种皮基生到包围种子。

Seeds usually 3-6, ellipsoid; aril basal to enveloping seed.

通常的种子3-6，椭圆形；假种皮基生到包围种子。

Mao Zedong Thought is a scientific concept bearing special meaning. In the early 1930s, MAO Zedong systematically proved the feasibilities of "enveloping the cities from countries and taking over power by armed forces". He also established three essentials in MAO Zedong thought: seeking truth from truth, mass line and independence, in his Fighting against bookishness, which became a milestone in the formation and development of MAO Zedong thought.

摘要］ 毛泽东思想是具有特定含义的科学概念，农村包围城市道路理论和毛泽东思想活的灵魂构成毛泽东思想的基本形态。1930年初，毛泽东比较系统地解决了关于农村包围城市、武装夺取政权革命新道路的一系列基本问题，同年5月，他发表《反对本本主义》一文，初步论述了毛泽东思想活的灵魂的三个基本点，即实事求是，群众路线，独立自主，从而成为毛泽东思想形成和发展的一个里程碑，标志着毛泽东思想的基本形成。

Before leaving for the winter break, though, I noticed the collective excitement enveloping the halls of LBS.

但在寒假开始之前，我注意到了充斥整个伦敦商学院的集体兴奋。

It has been found that the enveloping line of the average methane content to coal rank develops in the coalification stages, that the remarkable developments of the maximum average methane content coincide gr...

指出不同煤化作用阶段控气作用的实质在于煤物理结构和化学结构的演化，沉积作用控气的思路对煤储层渗透率非均质性预测具有一定实践意义。

In addition, depending on the method of numerical simulation and theoretical analyses, some kinematic and geometric features of 0° involute—enveloping worm gear drive, such as meshing surface, first—type limit, second —type limit, worm surface, the numerical representation of contact line and bearing contact, are systematically studied. These relevant conclusions provide an important basis for the design and manufacture of new type worm gear set. As we predict, the method of numerical simulation has special effect in solving the question of complex conjugate surface.

综合利用仿真方法与解析手段，对0°渐开线包络蜗杆传动的啮合面、一类界限、蜗杆齿面构成、仿真接触线及仿真接触域等运动几何学特性进行了系统研究，有关结论为此种新型蜗杆副的设计与加工提供了重要基础，并且显示出数字仿真方法在研究复杂共轭曲面问题时所具有的特殊功效。

Accoring to the polar theory of conic section, the characteristics of geometrical graphics concerning the conic section is discussed from following three aspects:the conbination of Point and line, harmony of point range and pencil of line , trace of point and enveloping of straight line.

本文根据二次曲线的配极理论，从点、线的结合性，点列和线束的调和性，点的轨迹和直线的包络三方面研究与二次曲线有关的几何图形的性质。

Based on differential geometry and spatial engaging theory,a set of formula of conical surface double enveloping worm gearing had been derived and its figures,position and distribution had been depicted by graphs.

以微分几何与空间啮合理论为基础，推导了锥面二次包络圆柱蜗杆传动两次包络过程中的啮合方程和主要啮合性能指标方程，以图直观的表示出其形状、位置和分布状况。

Owing to the key conclusion, this paper lays emphasis on the possible ways of realizing the singular conjugation by single—enveloping method. It is proved that the hyperbolic normal arc surface and the involute helicoid both may conjugate in singular points on the condition of single—envelope.

在奇点共轭理论的工程实现方面，文中明确指出二次包络是获得奇点共轭的有效手段，但并非唯一手段，在满足特定的运动几何条件下，一次包络即可获得奇点共轭。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。