模拟通道

By using the CFD software FLUENT, the inner-flow field of centrifugal fans with ruled-surface impeller versus with enveloping surface impeller has been simulated. The static pressure distribution, the dynamic pressure distribution, the total pressure distribution, the turbulent intensity and the speed vector of the two kinds of centrifugal fans are then analyzed and compared. From the calculating results, we found that the pressure distribution, the speed vector and other parameters of the two kinds of centrifugal fans are basically same. This implies that the tool-path generating arithmetic for the machining of the impeller can meet the aerodynamic requirements of the centrifugal fan. Furthermore the method can provide proof for designing department to establish sound manufacturing tolerance for impeller.

最后采用CFD软件FLUENT，利用标准k-ε湍流模型，采用分离隐式求解器，分别对直纹面叶轮离心通风机和包络面叶轮离心通风机整体风机内部三维流场和单个通道流场进行了数值模拟计算，在计算结果的后处理中，对相同坐标值处的静压力、动压力、湍流强度和速度矢量等参数进行了分析与比较，结果表明：在相同的计算参数条件下所得到直纹面叶轮离心通风机和包络面叶轮离心通风机内部流场差别不大，从而揭示所采用的叶轮数控加工的刀位规划方法的规划误差对流体机械动力性能的影响不大，这也为设计部门制定合理的叶轮加工公差提供了依据。

It is speculated that the hyperpolarization of VSMCs and decreased calcium influx through voltage-dependent calcium channels might be one of the electrophysiological mechanisms involved in the depressed vasoreactivity of hindquarter arteries induced by simulated weightlessness.

以上结果提示，VSMCs的超极化及进一步引起的通过电压依赖性钙离子通道的钙内流减少可能是模拟失重引起后身动脉反应性降低的电生理机制之一。

The change of the current density of the L-VDC may also contribute to the depressed responsiveness of hindquarter arteries from simulated weightless rats.

此外，本工作还观察了钙离子通道功能变化，发现模拟失重下肠系膜小动脉VSMCs L-VDC电流密度逐步降低，4 wk时达非常显著程度。

The formation position and growth direction of the segregation during the horizontal solidification of NH4Cl-H2O with hypoeutectic and hypereutectic compositions are numerically studied based on the experiment.

在实验验证的基础上，对亚共晶与过共晶成分的NH4Cl-H2O侧向凝固通道偏析的形成位置与生长方向进行了数值模拟研究。

This thesis describes the experimental and numerical researches of the flow characteristics of the impingement cooling in confined passages.

本文主要通过实验和数值模拟的方法对在受限通道射流冲击结构的流场特征进行了详细的研究。

An adaptive optical experimental system based on a 37-channel MMDM from OKO company is built. The wavefront aberration of a model eye and a human eye is investigated as the incident wavefront of an experimental adaptive optics system.

搭建基于OKO公司37通道微机械薄膜变形镜的自适应光学实验系统，分别以模拟眼和人眼出射波前为入射畸变波前进行实验。

The capacitance is 4.1μF,initial voltage is 10kV,and interelectrode gap is 7mm.The measured pressure of the first and second shock wave is 1.55MPa and 0.55MPa respectively.

通过压力传感器测得放电所产生的冲击波和气泡首次回胀时产生的冲击波在离通道 0 3m处的峰值压力分别为 1 5 5MPa和 0 5 5MPa ，模拟计算所得的峰值压力分别为 1 0MPa和 0 3 8MPa ，两者基本相符。

The highly integrated CX2070X SoCs include an integrated audio/voice digital signal processor, multi-bit codec, digital and analog input/out interfaces, and a power efficient 2.5-watt per channel Class-D amplifier to drive stereo speakers or optional post-width modulation and differential line-out for external speaker systems amplifiers.

高度集成的 CX2070X SoC 内置了集成的音频/语音数字信号处理器、多位编解码器、数字和模拟输入/输出接口，以及每通道功效为 2.5 W 的、驱动立体扬声器的或可选的后宽度调制的 D 类放大器，还有用于外部扬声器系统放大器的差分线路输出。

We studied the natural convection in narrow double-side heating arc by mock-up tests and numerical simulation in this thesis.

本文对双面加热的圆弧形窄缝通道内重水的自然对流进行了模化试验和数值模拟。

According to the most unfavorable fire scenario for safety evaeuation, the AEST can be obtained through the spread of fire and smoke spread simulation. And the REST of different staff loads are calculated by empirical formula method. Through contrasting two times, whether evacuation passage setting can meet the evacuation requirements is confirmed, and then solutions are proposed. Then highway tunnel fire cause is discussed by Fault Tree Analysis method, and the effective measures to reduce the probability of tunnel fire are reducing the number of flammable materials and using fire-retardant or noncombustible materials for inner decoration are obtained.

以厦门金山寨隧道为例分析火灾时人员的安全疏散，针对隧道内最不利人员安全疏散的火灾场景进行分析，通过对火灾蔓延、烟气扩散进行模拟获得可用的人员安全疏散时间AEST，并用经验公式法计算不同的人员荷载下必需的人员安全疏散时间REST，对比两个时间，判别当前疏散通道的设置是否满足人员疏散要求，并对不满足安全疏散要求的工况提出解决方案。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。