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Based on the energy method and Fourier series expansion the general expression of cogging torque was obtained and the harmonic components of cogging torques were analyzed under both ideal and non-ideal conditions.

针对永磁电机中非理想因素对齿槽转矩的影响，基于能量法和傅里叶级数解析方法给出了齿槽转矩的一般表达形式，并分析了理想及非理想条件下齿槽转矩的谐波成分。

The Fourier transform is an integral expression for a Fourier series applied to an infinitely long signal.

傅里叶变换式是对博里叶级数的一种积分表达式。

In using the field expression with Fourier integral form to calculate the performance of SLIM, the fast Fourier transformation algorithm is first employed in this dissertation to compute the Fourier integral.

在应用傅里叶积分形式的场量表达式计算单边直线感应电机的特性时，本文首次引入快速傅里叶变换算法计算傅里叶积分。

Thirdly, a new analytical expression for the noise figure of FRA is derived.

第四，给出了一种相比已有文献更为精确的FRA噪声系数的解析表达式。

X is a real-type expression. The result is the fractional part of X; that is, Frac = X - Int.

Frac函数返回参数X的小数部分，X是一个实型数，该函数的作用等价于Frac=X-Int。

According the connection between the solution of linear fractional differential equation and nonlinear fractional differential equation, the expression of the solution of the nonlinear fractional differential equation is formed.

在一定的条件下，建立了非线性分数阶微分方程在边值条件下有解存在。

The next output expression will have the default behavior, which is to suppress the decimal point if the floating-point value has a 0 fractional part.

下一个输出表达式将具有默认行为，即，如果浮点值小数部分为 0，就取消小数点。

For instance, if the expression is a floating-point literal, the constant identifier denotes a floating-point constant, even if the literal's fractional part is zero.

例如，如果表达式是一个浮点文，常量标识符表示一个浮点常量，即使这个文的浮点部分是0。

The main results are shown as follows:1.Screening freezing tolerant cultivars and lines of chrysanthemumTwenty seven lines of chrysanthemum grown outdoors were screened using \'injury rate\' and \'injury index\'.There were 7 cultivars and lines,which were relatively high tolerant to freezing treatment,i.e.,\'Jinbuhuan\',\'Xuetao\',\'Fuli\',\'Donglin 4\',\'Donglin 6\',\'Donglin 9\', and \'Donglin 13\'.There were 3 cultivars and lines,which were less tolerant,i.e.,\'Fenmeigui\', \'Donglin 1\',and \'Donglin 2\';The determination of electrolyte leakage,and contents of free proline,MDA,CAT,fructose,glucose and soluble sugars on 7 lines of chrysanthemums at different stages freezing showed that \'Xuetao\' and \'Donglin 4\' were more tolerant than others, and that especially \'Donglin 4\' was able to regulate its osmotic pathway to alleviate the \'injury degree\' caused by freezing conditions.2.Protein expression profile of chrysanthemum under low temperature stressTwo-dimensional liquid chromatography was applied to fractionate and analyze total protein taken from \'Donglin 4\' leaves grown at low temperature and at normal condition. Chromatography peaks of fraction were transformed to gel graph by ProteoVue software.

主要研究结果如下：1、露地菊抗冻品种和品系的筛选利用受伤率和伤害指数两项指标对27个露地菊品系进行耐低温筛选，筛选出'金不换\'、'雪涛\'、'富丽\'、'东林4号\'、'东林6号\'、'东林9号\'、'东林13号\'等7个耐低温品系，同时发现'粉玫瑰\'、'东林1号\'、'东林2号\'三个品系的耐低温能力最差；通过对不同自然低温处理时期，7个品系的电导率、丙二醛含量、脯氨酸含量、过氧化氢酶、果糖、葡萄糖和可溶性糖等指标的测定发现，'雪涛\'和'东林4号\'的耐低温能力要强于其它品系，尤其是'东林4号\'对低温的调节能力较强，在低温胁迫下，能够调节渗透途径减轻低温的伤害。2、低温胁迫下，露地菊蛋白质表达谱分析利用二维液相色谱技术，分离了'东林4号\'露地菊品系的低温处理和对照样品的总蛋白，通过ProteoVue软件分析发现：处理样品与对照相比共有蛋白差异点36个，其中显著增强表达的蛋白差异点有26个。

Neil: Well, frag is an expression from computer games. It means to kill your opponent.

Helen：这是一个电子游戏中特有的英语词，就是在游戏中杀伤对手的意思。

Great. What repertoire did you see?

太棒了。你看的是什么剧目？

I prepared not to accept such ridiculousness:"Please," I said to him.

我可不想理会这套荒谬的东西："请你通情达理一点儿。"