查询词典 flow down

For gas flow past cylinder, the characters of flow field in different Mach number and Knudsen number condition were investigated, and especially for low Knudsen number cases, the results were compared with calculating results of Euler's equation. It showed that they are correspondent by comparing the characters of bow shock and wake. The convergence rates of different high resolution and implicit schemes were also investigated. The convergence behavior of the implicit WENO scheme developed in this paper is better than others. For gas flow past NACA 0012 airfoil, the calculating results were compared with results of experiment. It showed that the results of WENO scheme are of higher accuracy for the case with angle of attack.

在圆柱流场时，我们探讨不同马赫数且不同纽森数时的流场特性，并在低纽森数时，与那维尔-史托克方程式的计算结果比较，我们比较了弓形震波及尾流附近的特性，其结果是相当符合的，同时我们也比较不同高解析隐式算则的收敛历程，从收敛历程图可得到，本文发展出来的隐式WENO算则有较佳的收敛效果；在NACA 0012翼形的流场中，我们将与实验结果做比较，发现利用WENO算则计算的结果，对於具有攻角的流场，亦有相当高的准确度。

A nonlinear eddy-viscosity turbulent flow model, which adopted third-order correlation of stress tensor and strain tensor, was modified and applied to flow computing of turbulent flow of internal combustion engine.

把采用了应力张量和应变张量的三阶相关关系的一个非线性涡粘度湍流模型进行修正后应用于内燃机缸内湍流流动计算，用此模型对几种ω形凹坑燃烧室内燃机汽缸内的流动进行计算，特别考查不同结构燃烧室内各处的湍能的变化，给出了燃烧室结构对缸内湍能影响结果，结果表明，凹坑结构时内燃机缸内湍能的分布和平均湍能的大小影响很大，可适当调整燃烧室结构来改变缸内湍流结构。

Firstly, it studies the relationships among cost, price, sales quantity and profit, and gives a optimal allocation model of indirect fixed cost and its calculating method for the firms using cost-plus pricing,. Secondly, it studies systematization of cost flow control technology and embedded it into MRP-Ⅱ. Then the model of integrating cost flow control and material flow control is presented.

本文一方面研究了成本—价格—销售量—利润之间的关系，为采用成本加成定价法的企业提出了一种间接固定成本在不同产品上的优化分摊模型，并给出了计算方法；另一方面将成本流控制技术系统化，并将其有机地嵌入MRP-Ⅱ系统中，提出了将成本流控制与物流控制有机集成的管理模式。

The origin、 development and present state of the container ship2. The deformation characters and collapse mode of the container ship3. The basic theory of thin-walled structural mechanics: The bending of the thin-walled beam; The unconstrained torsion of the thin-walled member bar; The constrained torsion of the thin-walled member bar with opening; The constrained of the thin-walled member bar with closed port.4. The calculation of the warp stress in the container ship based on the thin-walled structural mechanics theoryModeling of the hull ladder calculation based on referred mechanics theories of thin-walled member bar, calculation of crankle character of the each section, such as sectional coordinates、 Free twist shear flow、 secondary shear flow、 bend shear flow and so on.

本文主要包括下述六个方面的内容： 1 集装箱船的起源、发展和现状 2 集装箱船变形特征和破坏形式 3 薄壁结构力学的基本理论◇薄壁梁的弯曲；◇薄壁杆件的自由扭转；◇开口薄壁杆件的约束扭转；◇闭口薄壁杆件的约束扭转 4 利用薄壁结构力学理论计算集装箱船的翘曲应力建立船体阶梯计算模型，利用薄壁杆件力学中相关理论，求解各断面单元的弯扭特性，包括：扇性坐标、自由扭转剪流、二次剪流、弯曲剪流等。

Based on application of 3D body-fitted numerical grid with a curvilinear coordinates system and the theories about turbulent flow and the laminar flow, the new techniques that the independent variables were expressed by co-variable velocities were applied to solve the problems about flow around a high-speed car body for the first time.

采用当今数值新技术，较为全面和深入地研究了高速汽车车身绕流问题。本文依据k-ε双方程湍流模型和附面层理论，采用先进的曲线坐标系下的贴体与边界正交数值网格技术，首次把以协变速度分量作为独立变量的数值技术运用于汽车车身绕流问题的求解。

Can be seen, no overload is the essence of the centrifugal pump, pump shaft power curve peak, or shaft power with the increase of flow rate changes are small, relatively flat power curve that axis, so that the pump shaft power in the dead lift off to zero head (that is, from zero flow to maximum flow rate) are less than equal to the original context of the supporting motive power.

可见，无过载离心泵的实质是指，泵的轴功率曲线有峰值或轴功率随流量的增加而有较小的变化，即轴功率曲线比较平坦，使泵的轴功率在关死扬程到零扬程范围内都小于等于原动机的配套功率。

In the area of calculation method of complex flow field in turbomachinery, this dissertation studies grid generation method for coolant jet flow field and domain decomposition approach for complex flow field.

在叶轮机械复杂流场的求解方面，本文对冷气喷射流场的网格构造及复杂流场分区算法进行了研究。

Based on the BISQ model, we studied the elastic wave speed in two-phase porous isotropic media and its relation with Biot-flow and squirt-flow. The Green function is obtained for a point load in the two-phase porous isotropic media using the decomposition of the field potencial and the properties of Delta function. The expression and effects of squirt-flow in BISQ-Green function are discussed.

以BISQ模型的波传播方程为基础，研究了弹性波在孔隙各向同性介质中的传播速度及与流体的Biot流动和喷射流动力学机制的关系，进一步利用场势分解和δ函数的性质，给出了同时受Biot流动和喷射流动两种动力学机制作用下，两相介质波场位移在集中力作用下的Green函数，并讨论了喷射流动在Green函数中的表现形式和作用。

Objective To study the power spectrum density of blood flow ultrasonic Doppler signal using wavelet analysis. Method Doppler signal of blood flow in human common carotid artery was studied with wavelet scalogram analysis, an affine smoothing Wigner Ville transform with a constant "Q" character. Result Wavelet scalogram of blood flow ultrasonic signal had a higher distinguishability than STFT spectrogram in the low frequency portion, but had poorer decussation terms than spectrogram.

对于平稳信号的处理工具仍然是Fourier变换，但是，在实际应用中的绝大多数信号是非平稳的，现在看来处理非平稳信号的主要工具将是小波变换，这主要是因为传统的Fourier变换分析信号时，时间和频率分辨率精度是固定不变的，而利用小波变换分析信号，在信号高频段时间分辨率精度也较高，在信号低频段频率分辨率精度较高，这很符合非平稳信号的特点。

According to the users' requirement and visualization target of ocean information extraction, a visualization modeling system for ocean remote sensing information extraction is designed which includes its software structure, users' requirement use-case structure, class structure and flow-chart representation using the unified modeling language and object-oriented analysis method. The related flow definer and flow attemperment are designed and implemented.

根据海洋遥感信息提取可视化建模应用需求，以用户可视化模型建立及流程设计实现为目标，采用统一建模语言UML面向对象分析方法，设计海洋遥感信息提取可视化建模系统软件结构、用户需求用例结构、类结构及流程图表示法，同时完成流程定义器、流程调度的设计和实现。

On the basis of the study of the earthquake psychological factors, the article explores the course of disaster psychology generation、 the factors of disaster psychological trauma、 the dynamic generated mechanisms of earthquake psychology and by using the data of Tangshan earthquake、 Xiuyan earthquake、 the Indian Ocean tsunami, the paper studies the relevance of earthquake and the psychological trauma and reveals the intrinsic link between earthquake disasters and disaster psychology.

在研究了地震灾害心理的影响因素的基础上，从时间进程、生成过程、影响因素三个方面探讨了地震灾害心理生成的动力学机制，并进一步分析了唐山地震、岫岩地震、印度洋地震海啸三次灾害的数据，对地震灾害同心理伤害的相关性进行了实证研究，揭示了地震灾害同灾害心理之间的内在联系和关系。(4)本文根据前述研究，结合地震灾害救灾实际，设计了地震灾害心理救助措施体系，提出了针对不同灾害心理类型的救助方法，最后讨论了我国开展灾

You are taking a drumstick of the sweet-skined duck. You are having it, the sweet and crisp skin, the succulency and tender flesh.

你手里正拿着一只甜皮鸭的鸭腿，正在享受它，那酥脆又甜甜的皮，多汁细嫩的鸭肉。