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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
For modular representations the ring of invariants usually fails to be Cohen-Macaulay and computing the depth is often very difficult.
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In particular, we prove an integral formula for the degree of an ample divisor on a variety of complexity 1, and apply this formula to computing the degree of a closed 3-dimensional orbit in any SL2-module.
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Computing invariants of reductive groups in positive characteristic
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This paper gives an algorithm for computing invariant rings of reductive groups in arbitrary characteristic.
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We present an algorithm for computing the invariant field k(X)G.
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| | In this paper possible schemes for constructing several devices used in pneumatic data-processing equipments and pneumatic analog computing equipments are discussed. For the former, a selecting circuit using pneumatic relays for connecting 100 signals in sequence and a pneumatic analog-to-digital converter based on the so-called pneumatic interval indicator are presented. For the latter, a pneumatic multiplier and an approximate dead-time element using long tubes are presented. | | 本文讨论了构成气动数据处理装置及气动模拟计算装置中几种器件的可能方案.属于前者的是以气动逻辑元件组成的顺序接通100个信号的气动选择线路,以及在气动行程指示仪的基础上构成的气动模拟-数字转换器;属于后者的是气动乘法元件和以长导管构成的近似纯滞后元件. | | 文摘来源 | | A few interpolation method named Single-step Tracking Method for numeral control techniques is introduced. This method has been developed through the analysis of the simplest linear interpolation, and the merits of various interpolation methods have been taken into account. It has the merits of simple calculation, low interpolation error (less than 0.73 pulse equivalence) and easy speed control. The flowcharts for computing the linear and the circular arc interpolations are also given. The loci obtai... | | 在本文中,介绍了一种用于数控技术的插补方法,称为单步追踪法。这种方法是在分析了最简单的直线插补,并考虑了各种插补方法的优点以后提出来的。它的优点是:计算简单、插补误差小(小于0.73个脉冲当量)和容易控制速度。在本文中,还给出了直线和园弧插补的计算流程图,并对几种插补方法所得的轨迹进行了比较。 | | 文摘来源 | | This paper describes the simulation of cold tandem rolling process by digital computer using the dynamic state mathematical model of cold tandem rolling discussed in, and gives the result and analysis of the simulation. The features of this method are: the tension model is expressed as the state equation in the form of difference equation, which can be conveniently solved by recursive method; the tension system and the thickness system are seperable, so that the thickness equation becomes one dimensional n... | | 本文利用[1]中的冷连轧动态数学模型,对冷连轧过程进行了计算机模拟仿真,给出了仿真的结果与分析。这个方法的特点是:张力模型表示为差分方程形式的状态方程,便于递推求解;张力系统与厚度系统可分离,从而在联立解出各架张力后使厚度方程成为一维的非线性方程,用割线法可以方便地解出各架出口厚度。避免了模型线性化所造成的计算偏导数的麻烦以及只适用于小扰动的局限性,从而有效地减小了计算量,比使用线性化模型有较高的精度。 | | 文摘来源 | |   | | << 更多相关文摘 |
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