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as the process of campus network informatization speeding up continuously,an increasing number of schools built their own mail system which is available to both teachers and students. in addition to smtp session layer's anti-spam measures,surfcontrol e-mail information security gateway riskfilter is on the application layer, anti-spam engine asa integrates four anti-spam technology: digital fingerprints, heuristic analysis, semantic analysis and the internet threat database. many surfcontrol content security experts from all over the world maintain and update asa databases 365 x7x24 hours continually, and also it wouldautomatically updated four times daily, providing an accurate rate of 99.2 percent or more higher andbelow 0.1 percent rate of misjudgment of the spam filtering effect.

随着校园网信息化的进程不断的加快，越来越多的学校搭建了自己的邮件系统，提供给教师或学生使用，系统除了smtp会话层的反垃圾邮件措施，surfcontrol邮件安全信息网关riskfilter在应用层上，反垃圾邮件引擎asa集成了四种反垃圾邮件技术：数字指纹、启发式分析、语义分析和internet威胁库，由surfcontrol全球众多内容安全专家，365x7x24小时不间断维护更新asa数据库，每天自动更新4次，提供准确率高于99.2%、误判率低于0.1%的垃圾邮件过滤效果。

It is not antimatter, which is "anti-" in its elementary particle properties, not its mass.

它可不是反物质，反物质的"反"是指基本粒子的特性相反，而不是指质量。

By rash advance, instead rash advance, instead " turn over rash advance ", development arrives " great leap forward ", in a few short years, chinese history deduced the wind and cloud with an elusory field.

由冒进、反冒进、反"反冒进"，发展到"大跃进"，在短短的几年里，中国历史演绎了一场场难以捉摸的风云。

The simulation data show that the average error of land surface temperature is below 0.5℃, and the error of emissivity in band 11~14 is below 0.007(band 11,12)and 0.006 (band 13,14), respectively.

利用辐射传输模型MODTRAN 4模拟数据进行反演及验证分析，结果表明，神经网络能够提高算法的精度和实用性，反演的地表温度平均误差为0.5 ℃，反演的发射率平均误差分别在0.007(11、12波段)和0.006(13、14波段)以下。

In this method it is assumed that when the rail is bent downward, it will be subjected to the reactive force of elastic support points, and when bent upward, the rail will sustain the reactive force of the fastenings (i.e.the weight of sleepers and the friction between sleepers and ballast).

其中假定钢轨向下挠曲时所受的是支点反力；向上挠曲时所受的是扣件反力(由于轨枕自重和轨枕与道床的摩擦力)，这两种反力按上下方向以不同的非线性关系依赖于钢轨位移。

The inversion simulation was taken for the homogeneous half space, layered conductive model data and field data.

对均匀半空间、层状导电模型和实际数据进行了反演模拟，结果表明，模型约束迭代反演方法能从地面核磁共振感应电动势获得含水层较为合理的含水量及分布，且该结果可以从作为初始模型的均匀含水量分布反演得到。

The main theorem of this paper is to, firstly, on the grounds of experience preliminarily estimate the parameter of the pavement nonlinear model, simulate the process with computer procedure, and check the result with the data collected in sit, then set the aim function and the superiority back-calculation method, if the function is not satisfied, it is to the method adjust the parameter and make the model impend the actuality, If the function is satisfied, it is to end the process, and record the stress, deformation, displacement and the parameter as the actual condition.

本文分析的主要原理：首先根据经验，初估路面结构层应力应变非线性参数，利用计算机程序模拟承载板试验测回弹弯沉的过程，通过现场实测的弯沉数据来检核该模拟过程的真实性，设定目标函数，选定适当的优化反算方法，当目标函数不满足时，即利用该优化反算方法调整本构模型参数，使得模型能够逐步向真实解逼近，当目标函数得到满足时，则认为此时反算得到的路面结构层的应力、应变、位移场为真实的应力、应变、位移场，所推算得到的非线性应力应变模型为真实的路面结构层应力应变模型。

It Newton iteration is used in the analysis of math value,and the simplicity formula is given to resolve(including original initial value formula and advanced approximation formula),which can be characterized by fast speed and easy remembering.

采用数值分析中的牛顿迭代法求反渐开线函数的根，并给出了符合精度要求的解算反渐开线函数的简单公式(包括原始初值公式和近似值精化公式)，具有迭代收敛速度快、简单易记的优点，它们适用于[0，π/2]的全区段，免除了分段计算的烦恼，并运用VB编写计算机程序，从而实现反渐开线函数快速求根的目的。

The frequency divider with an inverting unit and a plurality of switch inverters in series makes the two inphase selectively turned on synchronously and turned off synchronously, thereby the frequency divider, with low phase noise, can tolerate a high frequency clock.

本发明提供的分频器，通过反相单元及串联的多个切换反相器的运作，使每一切换反相器的同相开关可以选择性地同步开启或同步关闭，以使得具有低相位噪声的分频器可处理高频时钟。

In the year of the 3rd quarter 2004, and big sum anti-dumping inquisitional cases all coming from the United States, involving already $ 980,000,000, share our country to be involved 92% of the amount of all money.

为有效应对日益增多的外国反倾销调查，本文分析了反倾销产生背景和发展情况、外国对我国反倾销的现状、特点、形成原因以及对我国经济发展的不良影响。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。