模拟实验

The main achievements of the project are as follows: 1 the hypothesis that a decrease in seed mass causes an increase in mean dispersal distance has been tested based on the experiments of weed dispersal by wind. The experimental results partly support the hypothesis. The results will help farmers to make an optimal strategy of weed control; 2 a statistic method for inferring probabilistic distribution function of a random variable has been developed, by which probabilistic distribution functions of weed species dispersal have been determined; 3 the reproduction structure of Bromus sterilis has been studied; 4 a more complex CA model with 25 neighborhood cells were built, which can simulate spread of a weed population. This work promotes developments in both theory and application of CA models; 5 the "mean law" in weed control has been proposed. Accordingly, the algorism of patch spring may be calibrated; 6 the "patch" and "true patch" have been mathematically defined so that herbicide can be efficiently applied; 7 simulation validates that initial configurations of weed will affect dispersal of its population and strategies of controlling it, or its distribution patterns affect its dispersal progresses.

主要完成的工作和取得的成果有：1）用实验证实了重量较轻的杂草种子并不一定飞得比较重的远，其结果有助于农民制订杂草的优化控制策略；2）发展了一种推断随机变量分布函数的统计方法并用它来获得了几个杂草种的扩散分布函数；3）对杂草Bromus sterilis的繁殖结构进行了研究；4）建立了一个具有25邻的较复杂的能模拟杂草扩散的CA模型，并在理论和应用方面促进了CA模型的发展；5）在杂草控制方面提出了&平均法则&，据此可对按块施药方法进行校正；6）精确地定义了&块&和&真块&以便在杂草控制中能更有效地使用除草剂；7）模拟证实杂草种群的初始配置影响其扩散和控制策略，或者格局影响过程。

Finally, two components mixture of caprylic acid and lauryl alcohol was used to attestate the validity of the process model. The model was also used in the simulation of the paroxetine free base and PB, compared with experimental outcome, analyzed the relatively error between experiments and simulations to further check the rationality of the model, which is beneficial to establish a more perfect model in the future.

应用正辛酸-十二烷醇对模型进行验证，并应用此模型模拟计算了帕罗西汀碱和胡椒基丁醚的分离过程，进一步验证了此模型的合理性，分析了产生实验值与模拟值相对误差的原因，为进一步完善刮膜式分子蒸馏过程模型奠定了基础。

Comparing with real engineering, analyze the experiment and simulation results, the conclusion is that the mixture model can simulate the flow field of gas-liquid two-phase well; the effect of plain plug flow aeration is better than circumvolve plug flow aeration's; for the same plug flow aeration , the effect of 20m/s aeration is better than 10m/s's and

结合实际工程的运行，对实验结果及模拟结果进行对比分析，结论为：采用混合模型能够很好的模拟曝气池内气液两相流的流场；平移推流式曝气比旋转推流式底层曝气的曝气效果好；在同种曝气方式，相同工况下，20m/s的曝气速度的曝气效果要比10m/s、30m/s的曝气速度的曝气效果好。

A modified homogeneous flow model was introduced to calculate the flow field in RH degasser,thus getting rid of some earlier methods that are unavailable to be generalized,such as reducing the computation region or presetting the distribution of gas volume fraction.

分别对有、无旋转磁场作用时的RH系统进行了模拟计算。模拟结果表明：流场和脱碳过程与现有文献中实验结果相符合；当旋转磁场作用后，磁感应强度为0.04 T时，初期脱碳速度比无旋流作用时增加了约15%，这是由于旋流增加了系统的搅拌能，提高了脱碳反应速率。

Thecalculated results show the adsorption quantity for ethanethiol in MFI is much morethan that in MOR under coequal conditions.

利用分子模拟手段，对于 MFI 型沸石，得到的吸附等温线和采用红外光谱所得的实验值基本一致，从模拟的结果来看，所选取的参数是恰当的。

The particle-gas two-phase flow in the high-pressure centrifugal blower of 9-26type was simulated three dimensionally with computational fluid dynamics Fluent.The result of the simulation showed the inhomogeneity of particle concentration at outlet of the exhauster,which agrees well with the measurement results.

采用通用计算流体力学软件Fluent对某9-26型风机内部气固两相流进行了三维数值模拟，模拟结果显示了风机出口固相浓度的不均匀性，与实验测量结果一致。

The particle-gas two-phase flow in the high-pressure centrifugal blower of 9-26type was simulated three dimensionally with computational fluid dynamics Fluent. The result of the simulation showed the inhomogeneity of particle concentration at outlet of the exhauster, which agrees well with the measurement results.

摘 要：采用通用计算流体力学软件Fluent对某9-26型风机内部气固两相流进行了三维数值模拟，模拟结果显示了风机出口固相浓度的不均匀性，与实验测量结果一致。

The similar material simulation is a kind of scientific experiment,this is one of ways that people discusses and understands geostatic pressure rules.

相似材料模拟是科学实验的一种，这是人们探讨和认识地压规律的途径之一，按矿山实际原型，按一定比例缩小做成模型，然后在模型中开挖巷道模拟采场工作，观察模型的变形、位移、破坏和岩层移动等情况。

Bean sprouts were divided into two groups including experimental group and control group to simulate the pratical use of TBZ. In the experimental group, the beans were soaked in 1 μg/mL TBZ for 8 hours before germing. The bean sprouts were collected and processed by micron technique.

模拟腐绝施药，鉴於腐绝是一种系统性农药且具渗透性，故设计豆芽实验模拟腐绝施药，将豆芽分成实验组及对照组，实验组在豆芽发芽前先浸泡 1 μg/mL 腐绝溶液中8小时以上，再进行发芽，收集豆芽后微米化，再进行测试。

Based on the academic experiences of the former scientists, a series of experiment wascarried on,such as Polymer quality testing,polymer passing,polymer flooding on homogen rockcore,polymer flooding on three seepage rate rock core,etc.

本文在吸收前人理论经验基础上，进行了聚合物质检，聚合物流动，均质岩心室内物理模拟，三管并联室内物理模拟等实验，为二类油层的开发提供技术理论支持。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。