查询词典 dissipation

According to the relationship between the shear rate and the energy dissipation rate,a method for calculating the average shear rate based on the volumetrically average energy dissipation rate is presented.

根据能量耗散率与剪切率的关系，提出了按流体的体积平均能量耗散率计算流体平均剪切率的方法，即可根据流体的密度、平均流速、管道直径、流动的摩擦因子或摩阻压降以及流变参数计算牛顿流体和幂律流体管流的平均剪切率。

The method of CFD numerical simulation is employed to replace experimental investigation. Hence, STAR-CD of the commercial software is used to simulate the outer flow field and heat transfer performance of integrated heat sink with heat pipes cooled by airflow. It is found that simulated results agree with experimental results well, which indicates that simulation method is reasonable and reliable. Further, simulated computations for different fin thickness, fin pitches and air velocities are performed to analyze their effects on heat transfer performance of heat sink. Finally, a new optimized structure of integrated heat sink with heat pipes is provided to meet future demands for cooling CPU and its heat transfer is also evaluated. For multi-heat source and higher dissipation power of electronic devices, the integrated heat sink with heat pipes attatched fins stagged in different positions of channels is presented and its flow and temperature fields are also simulated to enhance heat transfer. As a conclusion, all mentioned above are useful for the design of heat sink with excellent efficiency of heat dissipation and further research.

应用商业软件Star-CD对CPU集成热管散热器的外部流场和传热特性进行了数值模拟，将数值模拟结果和试验结果对比，验证了所提出的数值计算方法是可靠和可行的；利用此数值模拟方法对CPU集成热管散热器在不同散热翅片间距、厚度和气流速度下散热器的流动与传热性能进行了数值计算，分析了这些参数的变化对散热器传热性能的影响；针对未来CPU冷却的要求，确定了与最优气体流速匹配的最佳翅片间距、厚度的CPU集成热管散热器的新结构；利用试验评测了根据数值模拟提供的新结构开发出的新CPU集成热管散热器的传热性能；最后在场协同强化传热的理论的基础上，对CPU集成热管散热器的散热翅片错位排列来强化散热器的散热，满足未来大功率、多热源的电子元件的散热，为今后进一步优化散热器提供了依据。

In order to study the dynamic and instability rule and gain a damping evaluation method according to the test result, damping research ways of several foreign and domestic foil bearing types were compared. The interaction among cells was considered based on the approach of separating damping from stiffness. An effective damping evaluation method was developed based on the energy dissipation method. The structural damping of two-layer free plate foil bearing was analyzed on the basis of energy dissipation method.

为了更好地研究箔片轴承的动特性和稳定性，得出与实验结果相符合的评价方法，首先对国内外几种有关箔片轴承库仑阻尼的研究方法进行了比较，根据阻尼和刚度分离评估的思想，考虑箔片之间和箔片单元之间的相互作用，基于能量耗散的思想提出了一种有效的箔片轴承阻尼评估方法，最后对双层同向自由平箔结构箔片轴承的结构阻尼进行了详细分析和数值比较。

In this paper, based on a pill-box window model with a conical-shaped alumina ceramic and Ansoft HFSS software, the relation of VSWR with various electrical parameters in the window is simulated; the effects of variations of the output window structure on electrical field intensity, microwave power flow and quantity of heat are analyzed; the electrical characteristics of frequency bandwidth, power capability and heat dissipation for the pill-box window with conical-shaped or disk alumina ceramic are discussed, which shows that, with a rational structure of the window with conical-shaped alumina ceramic, the output capability of microwave peak and average power may greatly be increased, the secondary electron emission may effectively be suppressed, and heat dissipation may become more uniform and be easier for cooling.

本文在前人工作的基础上，基于圆锥形陶瓷盒形输出窗模型，采用Ansoft HFSS三维计算软件的优化模拟，对该输出窗模型的驻波频率特性与各种结构参量的关系进行了优化模拟，分析了该输出窗片结构变化对其表面的电场分布，功率流分布、热量分布的影响，得出最优模型参数。并且探讨了陶瓷窗片的形状和几何结构对改善输出窗的频带特性、提高峰值功率和平均功率、抑制二次电子倍增方面的作用。

After analyzing the difference of damper's energy dissipation, between two waveshapes of a simple loop load test, a comprehensive method for the capacity assessment of damper's power dissipation suggested.

通过对单调加载中因加载波形不同而导致耗能的变化的分析，提出了阻尼器耗能性能的综合评价方法。

In order to search for the measure to increase the energy dissipation ratio of stepped spillways,some main influence factors on the energy dissipation ratio of stepped spillways,such as unit discharge, dam slope ,height of step and so on,have been studied.

为了探求提高阶梯溢流坝消能率的措施，本文首次采用紊流数值模拟方法，对影响阶梯溢流坝消能率的一些主要因素，如单宽流量、坝坡、阶梯高度等进行研究。

Analytical results show that the web reinforcement ratio of pile cap and strength of concrete are important to the ductility and dissipation capacity of the joint, and axial load ratio is important to the bearing capacity, stiffness, ductility and dissipation capacity of the joint.

摘 要：提出一种新型叉桩节点的抗震性能试验方案，并对这种节点进行了模拟抗震性能试验的非线性有限元分析，得到节点的滞回曲线、骨架曲线、延性系数、割线刚度及耗能能力。

1The main heat dissipation way of bulb is the pressure air from blower.(2)The design of Air Guide could improve the efficiency of bulb heat dissipation greatly.

经由热流实验与模拟分析的结果，我们可以归纳大致归纳以下几个结论：（1）灯芯的主要散热途径是藉由鼓风扇提供的强制气流，将热气带出。

It will be a new energy dissipation way that using division tunnel as a discharge tunnel——level swirling internal energy dissipation discharge tunnel with shaft inlet, now more and more researcher give attention to it.

作为一种新的泄洪消能方式——竖井进流水平旋流内消能工成为目前越来越多专家学者的关注、研究热点。

In the research foundation of reconstructing leading hole into swirl hole, board hole, blocking hole and other internal energy dissipation ,this paper adopts the method of combining optimization design , experimental study and theoretical analysis together, and discusses barrage effect of level rotary internal energy dissipation discharge tunnel with shaft inlet, and obtains the preliminary achievement of testing and theoretical research.

本文在导流洞改建为旋流洞、孔板洞、洞塞洞等内消能工的研究基础上，采取优化设计、试验研究与理论分析相结合的方法，探讨了竖井进流水平旋流内消能泄洪洞的阻塞效应，取得了试验和理论研究方面的初步成果。

Objective To study the effect of chitosan in the prevention of fibrous scar formation in the epidural space after laminectomy.

目的 观察选择性脊神经后根切除术椎板切除后硬膜外几种防瘢痕粘连物质的作用并探讨其机制。

On his way to the lift, he looked back to us or was it me his eyes pointing?

当他要进电梯时，他回头看我们（或者说是我，他的眼光？