After analyzing the mechanism of the sand entry of perforated well, based on the theory of linear elasticity and considering the effect of temperature-change stress and drag force of the fluid flow through porous medium, a new model for forecasting the sand production of perforated well is established.
针对此问题，分析了射孔完成井的油层出砂机理，以线弹性理论为基础，以Fairhurst推导得到的井眼周围应力分布表达式为依据，得出射孔孔眼周围的应力表达式及射孔孔眼壁上任意位置的周向有效应力表达式，同时考虑变温应力和流体渗流作用的拖曳力影响，建立了一种新的射孔完井出砂预测模型。
Contrast and analysis of D-dimer and hemaleucin original value in blood were made before and after operation. Results:（1）There was substantive echo in greater saphenous vein soon after the treatment. The substantive echo became strong when reexamined. The bore size became smaller in some ways. And there was no sign of blood flow in the cavity.（2）Pathological mechanism showed that the bast in greater saphenous vein disappeared after being treated by holmium laser.
结果：（1）治疗后大隐静脉腔内即见实性回声，随诊发现回声逐渐增强，大隐静脉内径均比术前有不同程度缩小，腔内无血流信号；（2）、病理显示，钬激光治疗后大隐静脉内皮消失，内、中、外膜均不同程度的变性、坏死；（3）血管内不同介质直接影响钬激光对血管壁的作用结果；（4）手术前、后血D-二聚体值比较差异有统计学意义（P﹤0.01），纤维蛋白原值比较差异有统计学意义（P﹤0.05）。
The mechanism of Longitudinal crack formation has been studied in detail in the round ingot of low alloy structural steel from aspects of temperature, compositions and fluid flow.
从温度、成份、流股等方面对低合金结构钢圆锭纵裂纹形成的机理作了较为详细的研究，找出了控制圆锭纵裂纹的有效方法，对降低质量成本有所裨益。
An instrument consisting of a number of pipes that sound tones when supplied with air and a keyboard that operates a mechanism controlling the flow of air to the pipes.
一种卧式竖琴型或梯形的键盘乐器，类似三角钢琴，但通常有两层键盘（部分为一层，及其个别亦有三层）和两套或更多的弦，通过羽管或皮制拨子（拨子连接一顶重器，一般为一根直立的木杆）拨弦，赖琴键内端推动发声。
In the end, the effect mechanism of rainwater acidity, rainfall intensity, soil gradient and land using on pollutant generation, migration and transformation of pollution flow from soil-water interfaces were discussed.
在此基础上，探讨了降雨雨水酸度、降雨强度、土壤坡度以及土地利用方式等对土水界面污染流污染物产生及迁移转化的影响机制。
Applying this method associating noload operation and T100s test duty the gas pressure characters of piston and mechanism characters of operation mechanism of 126kV/40kA SF6 circuit breaker were coupling calculated. Influences of interrupted arc on pressure character, mass and enthalpy flow character and the strokes of operation mechanism were compared.
应用该方法对126kV/40kA SF6高压断路器空载、T100s开断压气缸内气体压力特性和操动机构的机械特性进行耦合数值计算，对比了开断电弧对压气缸内气体压力特性、质量和焓的流动特性及操动机构行程曲线的影响。
In this paper we present the security model of e-exchange based on mobile agent, which composed with user host, agent factory, authentication center and some merchants. We detail the flow of the exchange, at the same time analyse the security mechanism used in this model, such as agent creating, ID, autentication, contract.
本文介绍了一个基于移动代理的电子商务安全交易模型，这个模型由用户主机、代理工厂、认证中心以及商家等组成，详细阐述了交易流程，同时也分析了此模型中使用的代理创建机制、ID机制、认证机制、合同机制等相应的安全机制。
mobile agent apply to electronic commerce brings a new change to the development of electronic commerce, it makes the more taking time part of electronic commerce automatize. in this paper we present the security model of e-exchange based on mobile agent, which composed with user host, agent factory, authentication center and some merchants. we detail the flow of the exchange, at the same time analyse the security mechanism used in this model, such as agent creating, id, autentication, contract.
移动代理应用于电子商务给电子商务的发展带来的新的契机，它使得电子商务中费时的工作自动化。本文介绍了一个基于移动代理的电子商务安全交易模型，这个模型由用户主机、代理工厂、认证中心以及商家等组成，详细阐述了交易流程，同时也分析了此模型中使用的代理创建机制、id机制、认证机制、合同机制等相应的安全机制。
Based on the thermodynamics analysis results, the precipitation mechanism was also analyzed. The results show that pH value is a very important factor which determines the co-precipitation reaction direction and feasibility in this system. Antimony doped tin oxide powder prepared by routine way is actually the asymmetric compound of Sn4and Sb4O5Cl2. By adopting such methods as even phase precipitation, equal-flow precipitation, and proper complex compound, the homogeneous antimony doped tin oxide powder can be prepared.
研究结果表明：体系pH值决定沉淀反应的可行性和反应进行的方向；采用常规共沉淀方法制得的锑掺杂二氧化锡前驱体为Sn4和Sb4O5Cl22种沉淀的不均匀混合物；添加缓释剂进行均相沉淀、采用并流沉淀或在沉淀反应前使用适当的配位剂可获得锑掺杂均匀的二氧化锡。
Thus, an illative system of mechanism for heterogeneous catalyst (MDHCS 2.0) has been developed. We discuss the correlative detail with of excruciating particularity, including the illative rules, the data structure and main flow chat, which are described as follows.
在此基础上进行程序和与之配套的数据库设计，开发了基于反应能量学的催化机理推导系统(MDHCS 2.0)，详细讨论了算法的相关细节，包括推理规则、数据结构和具体流程。
E. characteristic mehod are used to study the gas flow conditions and pressure zones at the tip of delivery tube, and an alternative mechanism for the formation of pressurization and aspiration is proposed for the first time.
喷射沉积是一种新兴的快速凝固技术，近年来被广泛地用于研制和开发高性能航空航天用结构材料，在国内外发展非常迅速。
IPv6 is carried out as an alternative of IPv4, IPv6 has many features such as: 128 bit address, auto-configuration mechanism, simple header format, using IPSec, extend header, support of flow label.
虽然如私有地址及NAT技术的使用暂时缓解了IPv4地址短缺的问题，但是这些技术产生了很多的安全漏洞，而且它们并不能从根本上解决IP地址匮乏的问题。
First, the author studies the congregate mechanism of cash flow and the risk of credit institution.
现金流管理中的风险分配是资产证券化风险管理的重要方法之一。
The mechanism of spiral flow was supposed. We thought that the flown line's distortion to the same direction is one of necessary condition to spiral flow.
本文实验研究中所提出的螺旋流生成机理能够解释许多现象，根据这一机理提出的螺旋流发生器的改进装置拟进行专利申报。
In this paper, the protection mechanism of air curtain on horizontal parallel flow area is analysed.
本文分析了气幕对水平层流洁净区的保护机理，通过对气幕区及被保护洁净区的流场及浓度场特性分析，提出了较合理的气幕结构参数，从理论上证明了该种形式的气幕具有良好的围挡效果。
It is important to have good understanding of the mechanism of unsteady flow and heat transfer in modern gas turb...
理解涡轮中的流动和换热机理对提高航空发动机的性能至关重要。
Aim: This study is to evaluate the mechanism of isoflurane increas ing coronary flow.
近年来的研究发现，KATP通道广泛存在于血管平滑肌和血管内皮细胞［1］。
O-flow represents the execution of the CPU, which is continuous, uninterrupted and serial during the life cycle from machine's boot-strap to shut-down. S-domain is a storage abstraction of the active-O model, data and code are all store in different S-domain, which can communicates with each other by message mechanism.
本文首先对单一大内核操作系统、微内核操作系统、单地址空间操作系统、分布共享存储和分布式文件系统、永久性操作系统等进行了具体分析，揭示了已有操作系统在运行模型和存储模型上的缺陷，为后继的研究和论述奠定了理论和技术基础。
In this thesis Integrated Vertical-flow Constructed Wetlands were used to study on the purification efficiency and mechanism of PAEs.
本论文应用复合垂直流构建湿地系统对水中酞酸酯类污染物的净化效果和机理进行了系统研究。
In the second part of this paper, the mechanism of orifice noise in two-phase flow has been investigated, and a theoretical model for measurement of mass flow as well as phase fraction has been formed.
本文的第二部分对孔板在两相流中差压方根噪音的机理进行了探讨，推导出了利用孔板差压方根信号测量两相流质量流量和相比份的理论模型。