流

After analyzing the performance anduncertainty of the DDPM vortex flowmeter in gas-liquid bubble flows, the vortexflowmeter-Venturi tube combinative method using the vortex flowmeter and the Venturi tube as measuring cells was put forward, the measurement model based on thevortex frequency and the Venturi differential pressure was established, and it showsthat the relative errors of this method for the mass flow measurement of bubble flowsare within±5%. Furthermore, the flowrate and volume void fraction of bubble flowswere obtained using a single DDPM vortex flowmeter through the relationshipbetween the frequency and amplitude of the circumferential DDPM signal, and resultsdemonstrate that the relative errors of the flowrate and volume void fraction of bubbleflows are within±5% and±10% respectively, which indicates the broad applicabilityof this method to large numbers of engineering fields.

通过分析管壁差压式涡街流量计在气液泡状流中的性能和不确定度，提出了以涡街流量计和文丘里管作为测量元件的&涡街—文丘里联合法&，建立了以涡街频率和文丘里差压为被测量的测量模型，该方法对气液泡状流质量流量的测量相对误差可达±5％；通过建立涡街周向管壁差压信号频率和幅度与被测流体的关系，使用单个涡街流量计实现了对气液泡状流流量和体积含气率的双参数测量，该方法对气液泡状流流量和体积含气率的测量相对误差分别为±5％和±10％，可以满足大量工业实际应用的要求。

Compare the data structures of pressure fluctuation signals and AE signals both sampled in gas-solid fluidized bed, and the difference of data structures among AE signals sampled in gas-solid fluidized bed, pneumatic transport tube, slurry bubble column, liquid-solid loop reactor, and liquid-solid stirred tank. Based on the compare, the corresponding relation between signal structure and physical multi-scales was established.

通过对气固流化床的声发射信号与压力脉动信号的结构比较，以及气固流化床、气力输送、气液固淤浆鼓泡床、液固环管及液固搅拌釜中声发射信号多尺度结构差异比较，建立了多相流体系随机信号多尺度结构与物理多尺度的对应关系，认为在有固体颗粒存在的多相流体系，微尺度信号代表了颗粒相对于主体流动的运动状态；介尺度代表主体流相对于系统的运动或者不同主体流之间的相互运动；宏尺度则反映整个系统状态随时间的变化。3。

The results show that the performances of the passages vary with diaphragm depth, channel width and board spacing.

从流道中间隔板深度、流道宽度及流道板间距3方面研究了U形流道几何结构尺寸对性能的影响。

The images of coal mine's conveyer belt are sampled by image manipulation system, and using one dimension wavelet , the eigenvectors of "coal flow","conveyer","background" are depicted, in the last, with BP neural network classing function, the width of the coal flow is estimated.

根据图像采集系统实时采集的煤矿井下带式输送机煤流图像，利用一维小波分析方法求出描述图像煤流、胶带和背景的特征参数，通过BP网络进行目标分类，进而判别煤流边界，以求出煤流大小。

Separation efficiency and pressure losses performance of axial flow type gas-liquid cyclone separator with different vessel geometry was studied.

试验研究了不同筒体结构的轴流式气液旋流器的分离效率和阻力损失性能，试验研究表明，在流速相对较低时，管锥式旋流器的分离效率要高于管柱式，而在流速较高时，管柱式旋流器的分离效率要高于管锥式。

In this paper, experimental study (Ma=2.0 of cold flow) on a scramjet combustor model without combustion was carried on direct-connected facility. The effects of inflow parameter, length of isolator and back pressure on combustor and isolator flow field were analyzed and compared. The flow field of combustor was simulated with CFD software and the experimental results were compared.

文中在超燃冲压发动机燃烧室直连式实验设备上，对超音速燃烧室模型进行( Ma ＝2.0)冷流实验研究，比较了不同的来流条件、不同的隔离段长高比和不同的燃烧室出口反压对燃烧室内部流场以及燃烧室隔离段的抗扰动能力的影响，并利用数值模拟的方法对燃烧室内部流场进行了模拟。

One is the three different streamtube-methods which are single-disk single-streamtube, double-disk single-streamtube and multi-streamtube method based on the momentum theory, the other is the vortex method based on the potential eddy theory.

一是根据动量定理的流管模型得到的求解诱导速度的单盘面—单流管方法、双盘面—单流管方法、多流管方法；二是根据势涡理论得到的求解诱导速度的的涡方法。

Because the roadbed is in the condition of stable seepage in the normal highway construction and service, the formula of level and discharge of cut, tunnel and drainage structure in condition of confined water and dive are deduced on the saturated seepage theory.

4由于在公路建设和运行中，绝大多数时间路基是处于稳定渗流的情况，根据饱和渗流理论，推导建立了在潜水和承压水条件下路堑结构、隧道结构和排水设施在稳定渗流情况下的水位和流量计算理论公式；按地下水类型、公路结构型式、排水设施型式、是否进行衬砌或支护、组合方式和布置方案构建了公路工程地下水稳定渗流模型。

Because the roadbed is in the condition of stable seepage in the normal highway construction and service, the formula of level and discharge of cut, tunnel and drainage structure in condition of confined water and dive are deduced on the saturated seepage theory. The stability groundwater seepage model of highway engineering is established according to groundwater type, highway structure pattern, drain facilities pattern, whether carried on lining or timbering, combined pattern and layout.

4由于在公路建设和运行中，绝大多数时间路基是处于稳定渗流的情况，根据饱和渗流理论，推导建立了在潜水和承压水条件下路堑结构、隧道结构和排水设施在稳定渗流情况下的水位和流量计算理论公式；按地下水类型、公路结构型式、排水设施型式、是否进行衬砌或支护、组合方式和布置方案构建了公路工程地下水稳定渗流模型。

The architecture of the workflow management system is presented, in which Agent is the kernel technology and makes it the cornerstone of constructing the workflow management system.2 This workflow management system uses Agent development platform Aglets based on Java.

使用基于Java的Agent平台Aglets构造了体系中的多个智能Agent，并设计、提出体系中多个Agent的合作构造。 3、针对传统的工作流建模方式中存在的不足，结合工作流元模型，选用XPDL入行工作流建模，给出工作流模型实例。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。