流率

Two models were developed, one for calculating the leakage rate of water from heat transfer tubes due to one broken double ended guillotine tube in the steam generator of LMFBR using the one dimensional method of characteristics, and anotherone for temperature, adiabatic spherical to columnar hydrogen bubble growth model in large sodium water reaction.

采用一维特征线方法建立了快堆蒸汽发生器单管发生双端断裂情况下，水从破裂传热管流出的泄漏率计算模型和钠水反应气泡从球状到柱状的变温绝热生长模型。沸腾是钠冷快堆安全分析工作中必须要考虑的一个问题，而堵流是众多导致发生沸腾原因中十分重要的一个。

The method to configure RED parameters based on network properties is also presented. Simulations show that the modified Random Early Detection algorithm really performs better than the original Random Early Detection algorithm and can work for a much wider range of traffic. Finally, whether the assured service mechanisms i. e. an edge router tags every arriving packet of a TCP flow based service profile and core router drops packets differently at congestion using active queue management scheme is possible to provide a throughput consistent with target rate, is investigated under different network scenarios. Different factors including target rate tagged algorithm, RIO algorithm and TCP congestion control mechanism how to affect the throughput of an assured service TCP flow are examined. Based on a fluid model. we then derive a model of an assured service TCP flow, which is the function of round trip delay, packet loss rate and token bucket parameters. Based on this model, we observe that in some cases it is possible to regulate the token bucket parameters to gain a consistent throughput with the target rate, while in other cases there exist ranges of values of the achieved rate for which the token parameters have no influence. With the latter, some modified TCP congestion control mechanisms to assure TCP throughput are proposed.

最后，在区别服务网络结构内，研究了当前提出的一种边缘路由器根据服务合同标记、分类数据包，结合内部路由器采用主动队列缓冲管理机制区别处理数据包的确信服务机制是否可在不同网络情况下使TCP连接获得同目标速率相一致的、公平的吞吐量问题；指出影响TCP连接获得同目标速率相一致吞吐量的主要因素是目标速率大小、标记算法参数和TCP连接的拥塞控制算法；对此，基于流模型假设，首次推导出一个以端到端时延、数据包丢失率、漏桶参数为变量的确信服务TCP连接吞吐量模型；利用这个模型进行分析，得到主要结论是在一些情况下可通过设置合适的漏桶参数得到同目标速率更一致的吞吐量，而在另一些网络情况下不管如何设置漏桶参数都不能使TCP连接获得同目标速率一致的吞叶量；对于后一些情况，还初步讨论了改进TCP拥塞控制算法来改善TCP连接性能的方法。

Nowadays in virtue of the developed CFD simulation analysis software—— STAR-CD ,The flow field of the pure water in the half-spirality suction chamber is simulated.

借助于现在发达的CFD模拟分析软件——— STAR-CD 对半螺旋泵吸入室做了纯水的三维模拟分析之后，又在不同含气率的情况下，对半螺旋形吸入室的流场进行了三维模拟分析。

By using simulation-analysis software CFD,STAR-CD,a three-dimensional simulation analysis was conducted of the semi-volute suction chamber of a gas-oil multiphase pump for flow fields at different void fractions.

利用CFD模拟分析软件———STAR-CD，对油气混输泵半螺旋形吸入室在不同含气率下的流场进行了三维模拟分析。

The retrogradation kinetics properties of starch paste could be described well by rheological index.

当引入连续相流变指数和分散相沉淀率变量时，老化动力学模型的拟和精度进一步提高。

The results show that multi-lever and multi-strand horizontal submerged jets are a new energy dissipation type and have better stability of flow patter,lower velocity in the slab and higher dissipated energy rate than the single-lever and the multi-strand horizontal submerged jets.

研究表明，多股多层水平淹没射流较单层多股水平淹没射流流态稳定性好、临底流速低、消能率高，是一种高效的新型消能方式。

According to the shunt-wound principle of seep network, established method of calculation of permeability of equivalent of network of cliff body cranny.

根据渗流网络的并联原理，建立了岩体裂隙网络等效渗透率计算方法。

According to successfully extracting and graphing of uranium anomalies, the self-center uranium anomalies and their close relationship with meandering stream systems have been observed. The uranium anomaly always develops in the distributary and turning place of meandering stream system, and is related with thin sand area (whose sand thickness and sand ratio are less than 30 meters and 40% respectively), thicker coal, fine lithology, but the highest value of uranium anomaly exists in middle sandstone.

通过对铀异常信息的成功提取及平面编图，发现延安组中铀异常呈一个又一个具有自我中心的单元出现，且与曲流河沉积体系的关系密切：通常发育于河道分岔或转弯处；普遍发育于薄砂带，一般砂体厚度在30m以下，含砂率小于40%；铀异常单元与厚煤层关系密切；主要赋存于粒度较细的岩性中，部分也富集于煤中，但铀异常最高值富集于中砂岩中。

While they experience strong growth, low Roce, negative free cash flows and high PBR, the situation looks very similar to that in Europe in the early 1970s.

它们增长强劲、Roce较低、自由现金流为负而市净率较高，这种情况与20世纪70年代初的欧洲非常相似。

Methods : We gave 0, 1, 2, 3, 4 times low dose total-body irradiation to control group (No. 1 group) and experiment group (No. 2, 3,4,5 group) respectively with γ irradiation .Each dose is 0. 1GY and dose rate is 1.28 cGY/min. The interval of each irradiation is 48 hours . Six hours after every group finished their own total dose , we kill the rats and get their thyme .

采用γ射线分别对对照组(1组)和实验组(2、3、4、5组)给予0、1、2、3、4次低剂量全身照射，单次剂量0.1GY，剂量率为1.28cGY／min，每次照射间隔时间48小时，各组在完成照射总剂量后6小时处死取胸腺，采用双参数直接免疫荧光流式细胞术，检测大鼠低剂量全身照射后胸腺细胞CD4、CD8、CD3~+T细胞的表达情况以及CD4／CD8的变化。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。