查询词典 pre-existent

The influences of the nozzle diameter, pre-expansion pressure and pre-expansion temperature on the residence time, diameter, number, velocity and temperature of particles have been investigated.

研究了喷射口直径、预膨胀压力、预膨胀温度对颗粒停留时间、粒径分布、颗粒数量、颗粒速度及颗粒温度的影响。

The results show that increase of the pre-expansion pressure, decrease of the pre-expansion temperature and the nozzle diameter result in increase of supersaturation and nucleation of the supercritical solution and decrease of the particle size. The supersaturation in the course of RESS can reach 10〓 and nucleation rate is about 10〓 particles m〓s〓.

计算结果表明，预膨胀压力增加，超临界溶液在快速膨胀过程中过饱和度提高；预膨胀温度提高，超临界溶液在膨胀过程中的过饱和度和成核速率降低；喷嘴的直径减小，流体密度降在膨胀过程中增大，从而导致溶液的过饱和度和成核速率提高。

In the clinical use of the pre-expanded axial-pattern flap, we noticed that partial necrosis of transferred flap might develop following over pre-expansion.

在预扩张轴型皮瓣的临床应用中我们观察到大量预扩张的轴型皮瓣转移后可能出现皮瓣局部坏死的现象，但目前这方面的研究还比较局限，缺少对轴型皮瓣扩张的安全限度的了解和对皮瓣血液循环立体结构影响的观察。

Analysis the actuality and teaching reforming contents of pre-experiment in traditional Chinese medicine chemistry course, on the base of the traditional pre-experiment mode, some experiences which deserve popularized are explored.

分析中药化学预试验教学的大致现状和改革后的内容，在中药化学预试验的传统教学模式上，探索了一点值得推广的经验。

Under the condition of consumption of raw material naphtha not to be increased, two processes of pre-hydrogenation and pre-extraction was developed in the ethylene complex project and the investment and operation cost evaluated.

在不增加石脑油原料消耗量前提下，开发乙烯联合装置裂解原料前加氢和前抽提2个改进流程，并计算该装置的工程投资与运行费用。

Blind digital image forensics,a technology for detecting image authenticity and source without relying on any pre-extraction or pre-embedded information,is emerging as a new hotspot with broad prospect in the multimedia security field.

数字图像盲取证技术作为一种不依赖任何预签名提取或预嵌入信息来鉴别图像真伪和来源的技术，正逐步成为多媒体安全领域新的研究热点，且有着广泛的应用前景。

Blind digital image forensics, a technology for detecting image authenticity and source without relying on any pre-extraction or pre-embedded information, is emerging as a new hotspot with broad prospect in the multimedia security field.

摘要数字图像盲取证技术作为一种不依赖任何预签名提取或预嵌入信息来鉴别图像真伪和来源的技术，正逐步成为多媒体安全领域新的研究热点，且有着广泛的应用前景。

The algorithm first gains MD5s from the tag tree of a HTML web page, then pre-detecting replications from the first some MD5s, and then get the final result by pairwisely compare all MD5s of web pages in the pre-detecting result.

该算法利用网页的标签树结构选取文本块生成MD5指纹序列，先通过部分MD5的预消重处理，然后将预消重处理的结果网页对两两比较得到算法的最终结果。

Wire electrode based on the trajectory of the different forms of control, WEDM can be divided into three types: one is shaped by the imitation controlled cutting in line in advance and work to create the same shape by mold, when processing the workpiece at the same time rough and on the mold clamping in the machine tool table, in the process of cutting wire electrode tightly against the mold on the edge of the track for the mobile, thus cutting out and die on the same shape and precision to the workpiece; another One is the electro-optical tracking control, to carry out the cutting line, before the basis of certain parts to enlarge the proportion of drawings depicts an electro-optical tracking map-processing machines will be placed in design stage of electro-optical tracking, tracking platform Photoelectric first line of graphics has always been to follow the track of the Mexican campaign, and then through the use of electrical, mechanical linkage to control the machine tool table, together with the workpiece so相似形wire electrode relative movement, thus cutting out the same shape and design to the workpiece; again a digital control, the use of advanced automatic control of digital technology-driven machine tool in accordance with the pre-processing parameters according to the workpiece geometry pre-processing procedures for the preparation of a good CNC auto-complete processing, the production does not require appearance on board the need to map to enlarge map of the previous two form of control has a higher machining accuracy and a broad range of applications, both at home and abroad more than 95% have adopted WEDM NC.

根据对电极丝运动轨迹的控制形式不同，电火花线切割机床又可分为三种：一种是靠模仿形控制，其在进行线切割加工前，预先制造出与工件形状相同的靠模，加工时把工件毛坯和靠模同时装夹在机床工作台上，在切割过程中电极丝紧紧地贴着靠模边缘作轨迹移动，从而切割出与靠模形状和精度相同的工件来；另一种是光电跟踪控制，其在进行线切割加工前，先根据零件图样按一定放大比例描绘出一张光电跟踪图，加工时将图样置于机床的光电跟踪台上，跟踪台上的光电头始终追随墨线图形的轨迹运动，再借助于电气、机械的联动，控制机床工作台连同工件相对电极丝做相似形的运动，从而切割出与图样形状相同的工件来；再一种是数字程序控制，采用先进的数字化自动控制技术，驱动机床按照加工前根据工件几何形状参数预先编制好的数控加工程序自动完成加工，不需要制作靠模样板也无需绘制放大图，比前面两种控制形式具有更高的加工精度和广阔的应用范围，目前国内外95%以上的电火花线切割机床都已采用数控化。切割属电加工范畴，是由前苏联人发明的，我国是第一个用于工业生产的国家，当时由复但大学和苏州长风机械厂合作生产的这是最早的机型叫复旦型，我们国内在此基础上发展了快走丝系统。欧美和日本发展了慢走系统LS

I do not know how many friends to use the National Day holiday has done pre-holiday trading summary of inventory step-off pre-holiday trading?

不知这次有多少朋友利用国庆长假做过节前交易总结，盘点过节前交易步骤？

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。