零类

词组短语

null class

与零类相关的网络例句 [注：此内容来源于网络，仅供参考]

In the first part,two methods calculating the coefficients of nilpotentclass normal forms are proposed.one is the iteration search method based onrepresentation theory of Li-algebra,and another is a new matrixrepresentation method based on the adjoint operator concepts,both are ableto be used to analyse the normal form problems with high orders and largedimensions efficiently.

在第一部分工作中，对于幂零类规范形的系数计算，分别提出了基于李代数表示论的迭代搜索的理论和方法以及基于共轭算子概念的新的矩阵表示的理论和方法，从而有效地解决了维数和阶数较高时的计算问题。

The idea of zero cost cycle is devised to solve the critical problem of minimum cost flow. Additional related results obtained include: the theory of bottleneck analysis based on minimum cost augmentation chain and zero cost cycle; the proof of the existence condition and the coherence condition of bottlenecks based on network output; methods to solve various kinds of process bottlenecks; the development of the algorithms of optimization and bottleneck analysis of MCPN (i. e, MCPN-CBA1 and MCPN-CBA2); a series of scheduling strategies and algorithms based on cost analysis, profit evaluation and bottlenecks of process flow line.

四。提出了基于工艺流程成本分析、利润评价的两类生产网络模式：最小成本生产网络和最大利润生产网络；首次提出零成本圈的概念，从而提出并研究了最小费用流的临界问题；创建了基于最小成本增广链、零成本圈的瓶颈分析理论，证明了过程瓶颈的存在性条件以及基于网络加工量的瓶颈一致性条件；给出了求解各类瓶颈的关键技术，研究开发了MCPN的瓶颈分析算法MCPN-CBA1、MCPN-CBA2；提出了一系列基于工艺流程成本分析、利润评价及过程瓶颈的调度策略和调度算法。

Based on the theory of isomorphic mapping and singular value decomposition theorem, the maximum of the kernel Fisher discrimination criterion can be skillfully acquired by solving the minimum of its reciprocal in a small space, and the final solution is acquired without taking account of the null space and non-null space of the kernel within-class scatter matrices separately.

基于同构映射原理和奇异值分解定理，在一个更小的空间内将核Fisher描述准则函数的极大值问题转化为其倒数的极小值问题，使最终的解不需要分开考虑核类内散度矩阵的零空间和非零空间。

One of the cases was showed in theorem 4.18: finite group G is solvable if and only if Sec is nilpotent for every maximal subgroup At without prime index in G.

在本文中作者将要证明：G可解当且仅当对G中的任意极大子群M，或者I中存在极大元C使C/K幂零并且其Sylow2-子群的幂零类≤2，或者Sec为2-闭。

In particular, Bryce, Fedri, Serens and Guo( [2]and[8]) have studied thenilpotent length of the groups in NF \ φ, where φ is the class Y of allsupersoluble groups or the class Nr of groups with nilpotent length ≤r.

特别是，Bryce，Fedri和Serens以及郭([2]和[8])对N~FΦ中的群的幂零长度作出了研究，其中Φ是所有超可解群类Y，或者是幂零长度≤r的群类。

Based on this circuit, a series of trigger circuits were generated and excellent trigger effects were achieved.

摘要］该文介绍了晶闸管投切电容器的原理和快速过零触发要求，分析了两类晶闸管的触发电路的特点和存在的问题，指出了一种新型的从主回路晶闸管获取晶闸管电压过零信号的电路框图，以该电路支撑产生一系列触发电路，取得了优秀的触发效果。

Based on this circuit, a series of trigger circuits weregenerated and excellent trigger effects were achieved.

该文介绍了晶闸管投切电容器的原理和快速过零触发要求，分析了两类晶闸管的触发电路的特点和存在的问题，指出了一种新型的从主回路晶闸管获取晶闸管电压过零信号的电路框图，以该电路支撑产生一系列触发电路，取得了优秀的触发效果。

Established in 2000, Jiaxing and Pinghu, Ningbo Sanyi Fastener Co., Ltd. is specialized in manufacturing various kinds of stainless steel pipe connectors, weld nuts, flange nuts, square nuts, cap nuts, wing nuts, lock nuts of GB, ANSI, DIN, BS and JIS standards and non-standard nuts.

宁波市经济技术开发区三益紧固件有限公司成立于二零零零年，从台湾引进全自动进口设备，专业生产各种焊接螺母、法兰螺母、方帽、盖型螺母、蝶型螺母、防松螺母、非标准类特殊异型紧固件以及国标、美标、德制、英制、日制等标准紧固件、不锈钢管接。

By employing the Jordan-Wigner transformation and a modified mean field method, we are able to determine its ground-state quantum phase diagram approximately. The chapter IV is the main part of this Thesis. It contains the main innovations in our work. We propose and study in detail a S=1 Ising chain with the interplay of single-ion anisotropy and dimerization. The main results and innovations are the following: We show that the total number of the zero-component of spins at each site is a conserved quantity. This quantity, which may intuitively called as hole's quantum number, is hidden in the system. We show further that the hole's number in the ground-state is zero; By using the Jordan-Wigner transformation, we map this model onto a series of subsystems described by the spin 1/2 dimerized transverse Ising model. We solve the subsystems exactly, by presenting the exact wave functions and spectra;We show that this system exhibits a series of quantum phase transitions by varying the dimerization strength. We determine the quantum critical points exactly. We also show that the criticality is the same as that of the uniform S = 1/2 transverse Ising chain.

第四章是本文的重点及主要创新内容，我们具体研究了自旋为1的在横向单离子晶格场中的一维二聚化Ising链，我们得到的主要结果和创新之处是：(1)证明了这一模型具有一种隐藏的对称性，即自旋第三分量为零的格点数目是一个守恒量，并证明基态出现在空穴数目为零的子空间中；(2)利用Jordan-Wigner 变换将此模型变换到一系列自旋为1/2的横磁场中的二聚化Ising 模型，并给出了相应严格的波函数及能谱；(3)我们发现系统的基态随着二聚化强度的变化将呈现出一系列量子相变，我们得到了量子临界点的精确位置，并证明其临界性质与自旋为1/2的横磁场中的均匀Ising 链中的临界行为属于同一普适类。

Bearing factory has professional designers to 6, 36 employees, specializing in the production of ordinary-grade miniature bearings and the small zero-type bearings, processing custom non-standard, chrome steel, carbon steel, iron, and press bearings.

本厂有专业轴承设计人员6名，员工36名，专业生产普通级微型轴承和小零类轴承，加工定做非标，铬钢，碳钢，铁质，及冲压轴承。

与零类相关的网络解释 [注：此内容来源于网络，仅供参考]

generated hereditary class：生成的可传类

generalized nilpotent class 广义幂零类 | generated hereditary class 生成的可传类 | generated monotone class 生成的单调类

local nilpotent group：局部幂零群

类:class | 局部幂零群:local nilpotent group | 幂零阵的标准形:nilpotent matrices

class of nilpotent group：幂零群类

理想(子环)族 class of ideals | 幂零群类 class of nilpotent group | 二次型类 class of quadraticforms

null class：零类

null 零 | null class 零类 | null divisor 零因子

null class：零类;空类{论理}

点圆;零圆 null circle | 零类;空类{论理} null class | 零曲线 null curve

null set of class：类的零集

零集;空集;零测集 null set | 类的零集 null set of class | 零核空间;点空间 null space

null divisor：零因子

null class 零类 | null divisor 零因子 | null ellipse 零椭圆

null set：零集;空集;零测集

归零序列 null sequence | 零集;空集;零测集 null set | 类的零集 null set of class

null vector：零向量

以零向量(null vector)来说,可分为三种类别:闵可夫斯基时空中的正交归一基底(orthonormal basis)必然包含一个类时与三个类空的单位向量. 若希望以非正交归一基底来做运算,则可有其他的向量组合. 例如:可以轻松建构一种(非正交归一)基底,

zero-zero transition：零零跃迁

热力学第零定律 zeroth law of thermodynamics | 第零类声 zeroth sound | 零零跃迁 zero-zero transition