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The process has been simulated and optimized, and 99.5 wt% methyl acetate has been obtained in one column with 98% sulfuric acid as catalyst.

以98％浓硫酸作为催化剂，用醋酸和甲醇为原料，用一个塔成功制得纯度≥99.5％的醋酸甲酯，醋酸的转化率＞99.9％。

The distillation process is simulated by using Aspen Plus with the DSTWU fractionation module and the NRTL property method results showed that 99.9% methylnaphthalene and almost 100% tritoluene could be recovered.

利用Aspen Plus化工模拟软件的DSTWU精馏模块对产物进行模拟运算。结果表明：采用NRTL物性方法的模拟计算结果能够满足工艺要求，甲基萘回收率可达99.9%，溶剂回收率可达100%。

MAIN OUTCOME MEASURES: Standing on single or double feet was simulated to measure stress distribution, interface stress, and primary micromotion of femoral prosthesis in the three types.

主要观察指标：分别模拟单足和双足站立状态，测量3种股骨假体的应力分布、界面应力和初始微动情况。

The spatial and temporal evolution of simulated velocity and cloud microphysics fields show that the coupling of vertical velocity and vapor distribution is a kinematics criterion for vapor condensation and freezing that result in snow.

模拟的 运动场和云微物理量场的时空演变表明，垂直运动场与水汽场的耦合是水汽凝结和冻结成雪的运动学条件；气旋性涡柱和上升运动及深厚湿舌的耦合是暴雪形成的一种重要动力机制。

On studying the mechanism of geogas prospecting, the author used modern scanning microprobe technique and made simulated model experiment in laboratory.

在研究地气异常形成机理时，运用了现代扫描探针显微技术，同时在室内可控条件下作了模拟模型实验研究。

One is auto-zero and the other is chopping. The chopping amplifier with its many parts of modulation switches, pre-amplifier, band-pass selective amplifier, and voltage follower and demodulation switches is designed. The circuit is simulated with HSPICE to optimize. The residual offset of microvolt and the equivalent input noise PSD of 70 nV /Hz were obtained.

zero和斩波Chopping 对失调和噪声的影响，具体针对传感器的信号要求进行了斩波放大电路的调制，预放，带通选择放大器，电压跟随和解调等各个部分的设计，电路使用Hspice进行了仿真优化，达到了微伏量级的残余失调和70 nV /Hz输入等效噪声PSD。

Methods An high efficiency microwave radar transmitter was refit to act as the microwave resource,an microwave power densimeter was independently developed to detect microWave intensity;the hypergravity enviorment was simulated by using the centrifuge;the low atmospheric pressure environment was founded by refitting the animal low pressure oxygen cabin.

高功率微波武器在未来战争中，特别是在空战和海战中，对装备的破坏和人员的杀伤将发挥"杀手锏"的作用［56］。微波辐射的热效应和非热效应对机体的影响是复杂而广泛的，如同水源污染，大气污染和噪音污染一样，亟待进行深入研究和有效治理。目前国内外虽有不少关于超重环境和低气压环境以及微波辐射对机体影响的单因素研究报道［79］，但尚未见有微波辐射对处于超重或低气压环境下机体协同影响的报道。

In simulated coastal environment, the corrosion resistance of Cu-Mn weathering steel is better than that of Q235 mild steel.

在模拟海洋大气环境下，Cu-Mn耐候钢的腐蚀性能比Q235钢提高一倍以上。

In simulated industrial environment, the corrosion resistance of Cu-Mn weathering steel is also better than that of Q235 mild steel.

在模拟工业大气环境下，Cu-Mn耐候钢的腐蚀性能也有较大的提高。

Simulated Annealing's advantage over other methods is the ability to obviate being trapped in local minima.

模拟退火对其他方法的优点是能够避免被局部极小被困。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。