In this project, the calculated formulas and programs of the spin-Hamiltonian parameters (g and A factors, zero-field splitting) for transition metal ions in crystals (i. e., 3d2 and 3d7 ions in a tetrahedral site with cubic, trigonal or tetragonal symmetry, and 3d3 and 3d8 ions in a cubic octahedral site) are established from a two-mechanism model, in which not only the contribution due to the crystal-field mechanism, but also the contribution due to the charge-transfer mechanism (which is neglected in the previous papers) are included. From there formulas, the observed spin-Hamiltonian parameters in functional materials and compound semiconductors are calculated. It is found that the relative importance of charge-transfer mechanism increases with the increasing atomic number of ligand (e. g., for Co2 in GaP, InP and GaAs) or with the increasing valence state of 3dn ion (e. g., for Cr4, Mn5 and Fe63d2 ion series in oxygen tetrahedra). So, in these cases, the contributions of charge-transfer mechanism to spin-Hamiltonian parameters can not be neglected and the two-mechanism model should be used.
有鉴于此，本项目对固体中基态为轨道单态的过渡金属离子（具体为3d2和3d7离子在立方、三角和四角对称的四面体，3d3和3d8离子在立方八面体），建立了一套既包含晶场机制，又包括以前忽略的荷移机制的能处理自旋哈密顿参量g，A因子和零场分裂的双机制理论模型，计算公式和相应的计算程序，用以解释过渡金属离子在各种功能材料和化合物半导体中的自旋哈密顿参量实验数据，发现荷移机制对自旋哈密顿量的贡献随配体原子序数（如对Co2 在GaP，InP和GaAs）或过渡金属离子价态（如对等电子的3d2离子Cr4 ，Mn5 和Fe6 在氧四面体）的增加而增加；在这些情况，荷移机制的贡献必须考虑。
The results demonstrated that in the temperature range of 30~65℃, the reaction enthalpy is around zero, the equilibrium constant is about 1, the reaction is close to thermodynamic equilibrium, and the standard Gibbs free energy change is positive for each step of the three consecutive reactions.
结果表明，在30~65℃范围内，每步酯交换反应的反应焓均接近于零，平衡常数接近于1，每步反应均接近于热力学平衡，反应标准吉布斯自由能变化ΔG o均大于零；主要组分甲醇的活度系数接近于1。
To the separatory funnel in 10 ml acetate buffer and dispensable 1 ml of sodium thiosulfate solution, blending, followed by a second all-Canadian 10.0mL tetrachlorocarbon dithizone-0.01g/L solution, vibrating 2min, standing out carbon tetrachloride layer to 1 cm chromatometry Cup, zero-zero, adjusting to 520nm wavelength measuring the absorbance at, draw a comparison between the quantitative standard curve.
向各分液漏斗内加5mL乙酸盐缓冲液及1mL硫代硫酸钠溶液，混匀后再各加10.0mL二硫腙－四氯化碳溶液(0.01g/L)，振摇2min，静置分层，分出四氯化碳层于1cm比色杯中，以零管调节零点，于520nm波长处测吸光度，绘制标准曲线比较定量。
The results show that this reaction proceeds in two step: 1 silylene and formaldehyde form an intermediate complex, which is a kind of exothermal reaction with no barrier; 2 the intermediate complex isomerizes to sive the product. The barrier for the second step is 51.4kJ·mol^-^1 at MP2/6-31G^*//6-31G^* level (with zero-point energies correction). In view of dynamics and thermodynamics, it is between 300～400K that the reaction will have not only larger spontaneous tendency and equilibrium constant but also quicker reaction rate.
结果表明，此反应历程由两步组成：1硅烯与甲醛生成一中间配合物，是一无势垒的放热反应，2中间配合物异构化为产物，此步势垒经零点能校正后只有51.4kJ·mol^-^1(MP2/6-31G^*//6-31G^*)；从热力学和动力学的综合角度考虑，该反应在300～400K温度下进行为宜，如此，反应既有较大的自发趋势和平衡常数，又具有较快的反应速率。
The converter can be improved just by exchanging the position of the resonant inductance and the transformer such that the transformer is connected with the lagging leg. The improved converter has several advantages over its counterpart, e. g., the clamping diodes conduct only once in a switching period, and the resonant inductance current is smaller in zero state, leading to a higher efficiency and reduced duty cycle loss. The operation principle of the improved converter and the comparison with the original converter are analyzed in this paper. The effect of the blocking capacitor in series with the transformer or resonant inductance is discussed, and a best scheme is determined. The improved converter is adopted to design the DC/DC converter of secondary power supply in HVDC power system.
本文将谐振电感和变压器交换位置，使变压器与滞后桥臂相连，这样箝位二极管在一个开关周期中只导通一次，同时零状态时谐振电感电流较小，有利于提高变换效率和减小占空比丢失，本文分析改进后变换器的工作原理，并与改进前的变换器进行对比，讨论隔直电容在不同位置对变换器工作的影响，确定一种最佳工程方案。
In the oceans around Antarctica the temperature of the water in freez in g, always below zero.
在南极洲周围的海洋中，水温很低，总在零度以下。
However, since the release of Act Zero in early 2005, she has not appeared in front of the public eye again, except for a one-page article with an old photo of her which was published in the idol magazine g-girl during the same year.
不过，由于释放法零在2005年年初，她并没有出现在前公众视线再次，除了一个单页的文章与旧照片，她这是刊登在该杂志的偶像克女童在同一年。
Text Out does not recognize a zero byte (or for Unicode, a zero short in teger) as denot in g the end of a str in g.
Text Out 不会把零字节（或者对于 Unicode，是零 short in teger）看作是字符串结尾的表示。
A Trekker wonders what sex in zero g would be like.
Trekker好奇的想零重力下的性爱会是什么样的。
Through carrying on nitrifying potentiality dynamics analysis of the substrate artificial medium in the ecological floating bed, find substrate artificial medium nitrifies approximate to be zero response. the dynamics equation is y =-0.1347x+4.3542, the artificial medium nitrifying potentiality is 3.4×10-5g/h·slice.
通过对生态浮床底层人工介质的反硝化潜力进行动力学分析，发现底层人工介质的反硝化近似为零级反应，动力学方程为y=-0.1347x+4.3542，人工介质反硝化潜力为3.4×10~(-5)g/h·片。
If there are very little zero points in the character table of G, then the structure of G can be restricted.
当G的特征标表中零点个数很少时，可以期望G的群论结构有很大限制。
The interactions of dsDNA and ssDNA with two osmium complexes have been studied by surface electrochemical methods based on DNA modified electrode. It is found that both osmium complexes bond DNA with electrostatic interaction. And some thermodynamics and kinetics constants, such as bindind constant, ratio of binding constants K〓/K〓, limiting ratio K〓°/K〓°at zero ionic strength (μ＝0), free energy ΔG〓, dissociation rate constant k and binding site size s have been obtained.
研究发现两种锇配合物都是通过静电作用与DNA结合，并计算得到联吡啶锇和二氯菲咯啉锇与dsDNA和ssDNA相互作用的结合常数、结合常数比K〓／K〓、μ＝0时极限结合常数比K〓°／K〓°、结合自由能ΔG〓、解离速度常数k和结合位点数s等多个热力学和动力学参数。
The truth about zero-g, as the astronauts call it, is that it's a major pain.
零－g的真实情况就是它让人一个头两个大。
Among them, the mechanical structure, the configuration of hardware and software, the specification parameter and the environmental request of LK G90CS15.10.8 thiee-CMM mat are used in this thesis are introduced specially. By using LK G90CS15.10.8 three-CMM, the measuring data of the telephone hand-receiver are acquired. The types and the processing methods of measured data are discussed. Aiming at the error points in points data, a method using Coons surface is put forward. Filtration is commonly used in data smoothing, and median method is adopted in this article. Moreover, the chord method and the curvature method are used here to compress the data and extract the feature points of the telephone hand-receiver measured data. The developing process of surface molding is introduced and the formation algorithm of free-form surfaces is compared By using NURBS algorithm in mis article, the telephone hand-receiver surface is reconstructed. In addition, the surface of the telephone hand-receiver is cut according to the feature curve created by the feature points. The craft of numerical control machining program of complex surface is analyzed and compared. These craft are machining method, cutting dosage, machining remainder, cuter walking mode, the cuter advance, the retreat mode, programming zero, and machiningcoordinate so on. The conclusion that the layer cutting is fitter for rough machining is made. The formula of scallop-height method controlling machining step is deduced. Finally, the cutting and cutter parameter for rough machining and finish machining of complex surface is put forward in the MasterCAM software, according to which the cutter route for rough machining and finish machining are produced respectively.
本论文的主要工作在以下几个方面：分析与比较了目前常用的数字化测量方法及各种三维数字测量设备，着重介绍了本课题所用到的LK G90CS15.10.8型三坐标测量机的机械结构、软硬件配置、规格参数及环境要求，并用该机器对某电话机听筒外壳的三维表面进行扫描测量；阐述了反求工程的测量数据类型及各种数据点的处理方法，提出了利用Coons曲面原理剔除噪声点的方法，采用中值滤波方法对测量数据进行平滑，提出了用弦高差等方法和特征曲率法对电话听筒外壳数据进行了数据点的精简和特征点的提取的方法；论述了曲面造型技术的发展过程，比较了自由曲面和各种生成算法，应用NURBS算法重构了电话听筒的外壳曲面，并利用特征线对生成曲面进行了裁剪；分析比较了复杂曲面数控加工的切削方式、切削用量、走刀方式进退刀方式、编程零点和加工坐标系的确定，推导出用残留刀痕法来控制加工步长的关系式，阐述了在MasterCAM环境下如何选定待加工曲面的切削参数和刀具参数，并根据所选刀具和切削参数分别生成了电话听筒外壳型面的粗加工和精加工过程的刀具路径。
The simulated results show that when muzzle velocity is zero the cumulative error induced by acceleration of 0.6g can be up to 2.5 nm in 0.4 s, which is not negligible in nanometer measurement.
仿真结果表明，在0.4s时间内0.6g加速度所引起的累积误差可达2.5 nm左右，这对于纳米精度的测量是不应忽视的；初速度不为零时加速运动会引起更大的误差，而减速运动所引起的误差则相对小。
The thesis works out programs of C-C method, G-P arithmetic, adding weight zero-rank local method and adding weight one-rank local region method.
在数值实现上，本论文设计出了基于Matlab科学软件平台的C-C方法、G-P算法、加权零阶局域法、加权一阶局域法等程序。
The screening limit of the receptor binding system was 0.1 μ g/kg, false negative rate was zero, and the cross-reaction rate of other commonly used antibiotics was under 0.1%.
受体结合生物筛选的筛选限为0.1μgkg，假阴性率为零，其它常用抗生素的交叉反应率均<0.1%。
In particular, for a finite group G, every simple module of G is appeared in the conjugacy representation of G if and only if the sum of every row in the character table of G is not zero.
特别地，有限群的群代数的每一个单模均出现在共轭表示分解式中当且仅当有限群的特征标表中每一行元素之和不为0。
It is well known that the futures price F 0 is equal to the forward price G 0 under the condition of zero margin.
在保证金为零的情况下，期货价格F0与远期价格G0相等是一个熟知的结果。
Results show that main compositions of the FeMnO are δ-manganese dioxide and ferric hydroxide. The FeMnO contains with rich hydroxyl. The specific surface area is reached to 146.22m^2/g. Zero charge point of the oxide in pure water is about 8.0 of pH value. The FeMnO particles are quasi-spherical micro-particles with irregular sizes adjoined to form net construction each other.
结果表明，FeMnO以δ-MnO2和氢氧化铁为主要成分，含有丰富的表面羟基，比表面积达146.22平方公尺/g；在纯水体系中的零电荷点pH值约为8.0；FeMnO为尺寸不均的准球型微小颗粒，相互黏附成网状结构。