查询词典 flow direction

When the direction of centrifugal force as same as the velocity of flow, there is a circumfluence of anti-clockwise.

当离心力的方向与流速方向相同时，流场有一个逆时针方向的回流区。

1Niche construction can lead to stable coexistence of diverse genotypes in spatially structured population, which supports a stable polymorphism even without heterozygote superiority.(2)With habitat deterioration, niche construction accelerates the formation of steady polymorphism and hence impedes the harmful influences of environment on the population, which might embody a life-history strategy of organism under the unfavorable environment.(3)Niche construction results in the coexistence with alternative polymorphism through genotype-environment feedback and limited gene flow.(4)The niche-constructing organism is an active force to alter its environment and hence the direction of natural selection in order to better survival.(5)Spatial dynamics and distribution pattern of metapopulation are profoundly influenced by time-lagged niche construction.(6)Metapopulation size can reach a fixed level in the recency effect and equal weighting of time lag but is statistical stability in primacy effect, which implies the primacy effect is most remarkable.(7)The increment in the relative weightingof each generation\' niche construction and the length of time lag are significant factors for system destabilization.(8)Moderate capacity of positive niche construction benefits the metapopulation persistence.(9)The narrowing of niche breadth can decrease the metapopulation size and thereby increase the extinction risk.(10)The coupled function of time lag and niche construction make the system oscillation and generate the spiral wave, spiral-broken and circular wave in heterogeneous habitat.The spatial distributions of metapopulation and resource content are complementary due to a phase lag of their both frequencies.(12)Metapopulation persistence with niche construction depends not only on the balance between colonization and extinction, but also on the balance between the ability of niche construction and natural dissipation of habitat.(13)Metapopula-tion can survive under certain condition when the percent of suitable patches in habitat is lower than the ration of extinction to colonization.(14)Two thresholds exist in the process of transition of habitat quality dynamics from unsuitable to suitable, which include the intensity of niche construction and the initial condition of system.(15)Metapopulation size is positive correlated with the ability of positive niche construction, which means that organism or population who has strongly positive influences on their environment plays an important role to maintain the available habitat.

通过上述几个方面的研究，主要得出以下15条结论：(1)生态位构建可使空间结构种群，甚至是在没有杂合子优势的条件下，形成多种可能的稳定基因型分布模式；(2)随着环境的破坏与恶化，种群的生态位构建作用加速其较早形成稳定多态以阻碍环境对种群的不利影响，解释了有机体在不利环境下的一种生活史对策；(3)生态位构建作用通过基因型—环境反馈机制及有限的基因交流导致基因型多态的稳定共存；(4)有机体的生态位构建作用是一种积极的动力改变环境进而改变其自然选择的方向；(5)生态位构建的时滞作用对集合种群动态和空间分布产生深刻影响；(6)集合种群大小在时滞的崭新效应和等权重效应下达到一固定值，而在首位效应下达到统计稳定，表明首位效应的影响最显著；(7)首位效应下生态位构建相对权重的增量和时滞的长度是影响系统不稳定性动态的关键因素；(8)适中的生态位构建强度有利于集合种群的续存；(9)生态位宽度变窄会减少集合种群的数量从而增加其灭绝风险；(10)时滞和生态位构建的双重作用使系统产生周期振荡，并在异质性环境中产生稳定的螺旋波，破碎的螺旋波和环形波三种分布模式；(11)集合种群与资源含量的空间分布因为相滞而互补；(12)具有生态位构建的集合种群续存不仅取决于侵占率与灭绝率之间的平衡，而且依赖于生态位构建能力同其生境的自然消耗速率之间的妥协；(13)当生境中适合侵占的斑块比例小于其侵占率与灭绝率之比时，生态位构建作用促使集合种群在一定条件下续存：(14)生境斑块的状态从不适合到适合转变过程中存在生态位构建强度和系统初始条件这两个阈值；(15)集合种群的大小同正生态位构建能力正相关，意味着对环境具有较强正作用的有机体对维持有效生境起积极作用。

A vertical fractured well can bring out two-dimensional flow in the direction of normals of developing ellipse — conjugate ellipse isobar and hyperbola streamline bunches with the two ends of the fracture as their focuses.

垂直裂缝井采液时诱发地层中的平面二维椭圆渗流，形成以裂缝端点为焦点的共轭等压椭圆和双曲线流线族。

Furthermore, electroviscous effect on flow in the contractive direction is a little greater than that in

微通道截面扩张方向下降，而且在微扩散管不同方向的流动阻力也不同。

First, the thesis analyzed the specialties and the existing problems of the controlment of the flow industry producing, and then reviewed the developments and the actual state of the research on the subject of production direction. Based on these above and in accordance with the ongoing systems' bugs and the production data's characteristics, through clustering statistics and relativity analysis, a statistics model was brought forward, then I present the model for production prediction.

本文首先分析了流程工业生产调度的特点和现存问题，回顾了生产调度研究的发展和现状，在此基础上结合球团厂现有生产调度的缺陷和生产数据的特点，并根据球团工艺，通过聚类统计和相关性分析提出了数据挖掘的对象即产量与原料用量和质量间的关系。

The number and size of flow jets can be varied to optimize the creation of a mixing vortex, and the direction angle can be varied in the same manner, and/or optimized for Coriolis efficiency (counter clockwise in the Northern Hemisphere, and clockwise in the Southern Hemisphere).

的数量和规模的流动战斗机可以多种多样，优化建立一个混合涡和方向不同的角度可以以同样的方式，和/或优化的科里奥利效率（反顺时针在北半球，并顺时针方向的南半球）。

Around the dark core of an optical vortex, the energy flow carried by the light beam is like a spiral staircase, flowing in a clockwise or counterclockwise direction.

绕着光涡旋的黑暗中心，光束携带的能量流就像螺旋梯，沿着顺时针或者逆时针方向流动。

The direction of conventional current flow is counterclockwise.

传统的电流方向是逆时针方向。

One is to utilize ships and special meshwork to draw or push away the sea-ice on the sea, and the other is to set up some barriers made up of several pillars at coast, which is vertical to the main direction of sea-ice movements, and to centralize the moving sea-ice along the bar according to the characteristic that sea-ice moves with wind and sea-flow, which is easy to carry and debark the ice.

一是利用船舶和特殊网具在海上拉冰；二是在海岸边建一个与海冰主运动方向相垂直的由若干个柱子组成栅栏，利用海冰沿按风和流的运动方向而移动的特点，将运动的海冰集聚在栅栏前，便于把冰搬运上岸。

The first one is to build a slope of certain gradient and length according to the main direction of sea-ice movements at coast, to make the sea-ice assembling under the slope climb along the slope by virtue of environmental driving force of wind and flow, and then to take out sea-ice cubes to desalinize after sea-ice falling into the ice-storing section when it reaches the top of the slope.

一是在岸边按海冰运动的主方向修建有一定坡度和长度的斜坡，利用环境驱动力的作用，使聚集在斜坡下的海冰沿着斜坡向上爬升，上升到坡顶后跌入贮冰区内，再从贮冰区中取出海冰块进行淡化。

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。