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positive gradient
相关语句
  正梯度
     The vertical distribution of temperature and salinity can approximately be said in three categories: homogeneity, positive gradient and negative gradient.
     温、盐度的垂直分布大致分均匀型、正梯度型和负梯度型三类。
短句来源
     In deep ocean, the profile of sound velocity near the ocean surface often turns from weak positive gradient to weak negative gradient in a short time, this may exert an enormous influence on the acoustic propagation near the surface.
     在我国部分海域,表面声速常常在较短的时间内从弱正梯度变为弱负梯度,这将对表面附近的声传播产生巨大影响。
短句来源
  正向梯度
     Fluorescent ternary diagram and synchronous fluorescence spectrum can properly indicate the direction of the micro migration :from deep strata to surface,R 320 increases,λ 360 nm decreases and every wave band possesses positive gradient with the exception of λ 430 nm
     荧光光谱三元图和同步荧光图谱能较好地指示微运移的方向 :自深层到地表 ,λ32 0nm增加 ,λ36 0nm减小 ; 除λ430nm外 ,各波段均具正向梯度
短句来源
  “positive gradient”译为未确定词的双语例句
     It is w ell-known that the solution for this problem w ithout the gradient term in the equation becom es extinctin finite tim e ifand only if0 < α< 1 . The aim ofthis paper is to study w hether or not the positive gradient term on the right hand side of the equation will affect the extinction properties of the solution.
     众所周知,若方程不带梯度项,上述问题的解当且仅当0 < α< 1 时在有限时间内耗竭. 本文的目的是研究方程右边正的梯度项是否会影响解的耗竭性.
短句来源
     The positive gradient variation and the upward light taxis constructional gradient reflect that the vertical micromigration objectively exists, and reflect the tomography and constructional differentiation during hydrocarbon's migration.
     横向联井剖面的指标浓度(或强度)及变化梯度均显示出边缘井远大于油井、油井大于干井的分布特征,反映了运移效应在油藏外围处微弱而油水边缘处最强。
短句来源
  相似匹配句对
     From "Negative" to "Positive"
     从消极走向积极
短句来源
     weak positive;
     弱阳性(+),积分1一4分;
短句来源
     Gradient of the Text
     文本的梯度
短句来源
     Gradient Elution
     梯度洗脱
短句来源
     A series of electromigration tests were performed at positive and negative temperature gradient.
     不同温度梯度和无温度梯度条件下的实验结果表明,逆向温度梯度能显著提高金属化电徙动失效时间,这可以从温度梯度驱动的热扩散离子流作用得到解释。
短句来源
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  positive gradient
In the former the Lüders bands tend to move into a negative strain gradient, while in the latter they move into a positive gradient.
      
The consequent positive gradient means there is a possibility of wave generation, production of type III radio bursts, and energy redistribution of the electron beam.
      
The first code is one-dimensional (with three components of velocity and magnetic field) which is used to follow a slow shock that propagates into a positive gradient of density versus distance.
      
The event is seen simply as a pulse moving outward from the Sun after a cosmic-ray burst with a negative density-gradient in front of it and a positive gradient behind.
      
Benoxaprofen inhibited both FMLP-induced chemotaxis and chemokinesis but did not affect the binding of radiolabelled FMLP to PMNL or orientation of the cells in a positive gradient of the leucoattractant.
      
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Distribution of water temperature and salinity varies with monsoons in north central Taiwan strait. At the period of northeast wind (From Oct. to next May), when the Zhemin coastal current (low temperature and low salinity) flows southward along the west coast, the current branch outside Haitan Island expands southeastward, varying in range with the intensity of the Zhemin coastal current. In the area 24°30′N, 119°30′E, a strait Warm current (high temperature and high salinity) stretches northward under the...

Distribution of water temperature and salinity varies with monsoons in north central Taiwan strait. At the period of northeast wind (From Oct. to next May), when the Zhemin coastal current (low temperature and low salinity) flows southward along the west coast, the current branch outside Haitan Island expands southeastward, varying in range with the intensity of the Zhemin coastal current. In the area 24°30′N, 119°30′E, a strait Warm current (high temperature and high salinity) stretches northward under the influence of southwest wind. Its temperature and salinity increase from northwest to southeast. At the period of southwest wind (from June to Sept.) the Surveyed area are essentially dominated bythe strait's warm current. From June to August an upwelling occurs at the waters of west coast, its centure being in the vicinity of Haitan Island. The salinity of this waters reduces, yet its temperature rises, from northwest to southeast.The vertical distribution of temperature and salinity can approximately be said in three categories: homogeneity, positive gradient and negative gradient.

台湾海峡中、北部海域海水温、盐度分布随季风进退而异。东北季风期(10月—翌年5月),进入调查海域的浙闽沿岸水(低温、低盐)顺海域西岸海区南下的同时,在海坛岛外有一分支向东南扩展,其扩展范围随浙闽沿岸水强弱而异,而且在24°30′N,119°30′E附近有海峡暖流水(高温、高盐)向北伸展,它随西南风增强而向北推移。海域温、盐度值自西北向东南递增。西南季风期(6—9月),调查海域基本上为海峡暖流水所控制。在6—8月,海域西岸海区有上升流产生,上升流中心在海坛岛附近。海域盐度值自西北向东南递增,而温度分布趋势与盐度分布相反。 温、盐度的垂直分布大致分均匀型、正梯度型和负梯度型三类。

Characteristics of vertical structure of tea plantation's ecoboundary layer and its variation with time and weather conditions are discussed in this paper. Twigs and leaves are very closely arranged in a tea canopy. Inversion and positive gradients of vertical distributions of temperature and humidity occur within the canopy owing to the influence of plant physiological activities on a clear day. The maxima of temperature and humidity appear near the leaf layer, where from, they decrease downward and upward....

Characteristics of vertical structure of tea plantation's ecoboundary layer and its variation with time and weather conditions are discussed in this paper. Twigs and leaves are very closely arranged in a tea canopy. Inversion and positive gradients of vertical distributions of temperature and humidity occur within the canopy owing to the influence of plant physiological activities on a clear day. The maxima of temperature and humidity appear near the leaf layer, where from, they decrease downward and upward. The features of vertical structure vary with time and weather conditions. The crown canopy of tea ecosystem, including concentrated leaves and branchlets and their environments, should be recognized as an ecobody because the interactions between" organisms and their environments within the crown are so strong that they could not be separated from each other and be characterized by a special ecological function. On larger scales, ecobody plays a special role in the exehanges of material, energy and information between canopy and its environment.

对茶园生态边界层的垂直结构特征及其变化规律的研究表明,茶园冠层的枝叶密集,叶片垂直分布集中。在晴天,由于茶树生理活动的影响,使得温度和湿度垂直分布形成明显的逆温层和正的湿度梯度,在叶片分布层附近达到最大值,向上向下减小,并随天气条件和时间变化而有所不同。生态实体是叶片分布层中生物体与环境之间相互作用而形成的具有特殊生态功能的实体,在较大的尺度上,以独特的生态功能与其周围环境进行物能交换和信息传递。

The sliding contacts of gradient layers,sandwich layers and ordinary multi-layers coatings subjected to the same surface load have been investigated under elastic-plastic deformation in this paper. The result shows that the positive gradient layers coating, in which the elastic modulus reduced gradually from the top layer to the substrate, can improve the strain and stress fields near the layer-substrate boundary greatly and its stress contour in the vertical direction is very smooth. Also its stress is...

The sliding contacts of gradient layers,sandwich layers and ordinary multi-layers coatings subjected to the same surface load have been investigated under elastic-plastic deformation in this paper. The result shows that the positive gradient layers coating, in which the elastic modulus reduced gradually from the top layer to the substrate, can improve the strain and stress fields near the layer-substrate boundary greatly and its stress contour in the vertical direction is very smooth. Also its stress is small on the layer-substrate interface and in the substrate. The sandwich layers coating can reduce the maximum shear stress greatly on the interface of the layer-substrate and the stress at the crack tip is minimum, but the stress and the strain gradients near the interfate is very large. The stress and strain distributions of the common multi-layer have not distinctly improved compared to those of single layer. Known from the analysis of the stress and strain distributions and the crack stress fields for the four kinds of coatings, the gradient layers coating has more advantages in these aspects. Each of the three other coatings has its own excellent performance in some respect but also exists its obvious shortages. The results of this paper can offer the reference for the selection and design of coatings.

本文研究梯度层、三明治层及普通多层膜覆层体受相同表面载荷滑动接触作用下的弹塑性变形情况。结果表明从表层至基体弹性模量逐渐降低的正梯度硬覆层体,能显著改善膜层与基体界面附近的应变分布,沿纵向的应力分布曲线非常平滑,在膜层与基体界面间及基体中的应力较小;三明治覆层能显著降低膜层与基体界面处的最大剪应力,且裂纹尖端的应力值最小,但在界面附近的应力值和应变梯度很大;普通多层膜与单层膜相比,应力、应变分布没有明显的改进。通过对上述四种覆层体在应变、应力分布及裂纹应力场的分析可知,梯度层在这几方面都有较明显的优点,其它三种覆层体虽在某一方面有最突出的优点,但却在其它方面存在最明显的缺点。本文研究结果可为选择及设计覆层膜提供参考。

 
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