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In this paper, the spatial distribution of soil erosion intensity on a long and straight cultivated slope was studied using 137Cs measurement and wavelet analysis. The results showed that there existed an fluctuant period of soil erosion intensity with 142m along 4 transects downslope, which suggested that the intensity of soil transporting changes between weak and strong alternately downslope during the impact of long-term erosive rainfall.

本研究通过采集开垦近100年的黑土直型坡耕地的土壤样品,利用137Cs示踪技术,结合小波分析方法,研究了长坡长直型坡耕地50多年来土壤侵蚀强度的空间变化规律,结果显示4个断面顺坡方向上的坡面侵蚀强度均存在着坡长为142 m的强弱交替变化的波动周期,这反映了长坡长直型坡土壤在长期的降雨侵蚀过程中,泥沙沿坡面输移的强弱交替变化。

And it is proved that a semiring S in ■°■l is a subdirect product of a member of ■° and a member of ■l if and only if the multiplicative reduct of S is a subdirect product of a group and a semilattice by using the concept of sturdy frame of type(2,2) algebras.

O∩■°■B和■∩■°■中成员的次直积分解,并利用&(2,2)型代数的坚固构架&的概念,证明了半环S∈■°■l是■与■l中成员的次直积当且仅当S的乘法半群是群与半格的次直积。

In the optical system of DVD pickup, the collimating system has very important function, and its performance has large effect on design of objective lens. The collimating system of optical pickup was designed and implemented; the performance of collimating system is very good proved by experimental result.

在DVD光学读取头中,准直系统具有非常重要的作用,它的性能直接关系到整个DVD读取头的效率和物镜设计的难度,作者设计并制作了准直系统,理论分析和试验表明,准直系统具有良好的性能。

Because of simple structure and easy fabricating, the cylindrical lenses have been used in many practical applications for beam collimating of LDs.

柱透镜因其结构简单、材料便宜以及加工容易而在半导体激光束准直领域获得较多的应用,但普通的圆柱透镜其准直能力非常有限,为了提高柱透镜的光束准直能力,设计出更加合理和可行的结构是目前在这方面研究的主要方向之一。

Direct-action is through direct manipulation of the spring force; Pilot is a good pre-adjust the air pressure regulator instead of direct-action spring to surge, and the general flow characteristics of pilot-valve direct-acting type than good.

直动式是借助弹簧力直接操纵的;先导式是用预先调整好的气压来代替直动式调压弹簧进行调压的,一般先导式减压阀的流量特性比直动式的好。

The results of pressure drop characteristics experiments indicate that the new type cyclone tube's pressure drop reduction extent is directly related to the sticks'number, length and the radial position of the straight stick pressure drop reduction frame; is directly related to the length, width and number of grid pressure drop reduction frame installed under the split flow core tube.

安装在排气芯管内的直杆减阻框、栅格减阻框使旋风管的压降有不同程度的降低,减阻幅度与直杆减阻框杆数和长度成正比;与直杆的径向位置大小成反比;与安装位置、绕流截面形状有一定的关系;并与栅格减阻框的长度、宽度和片数成反比。

Direct drinking water industry is now ushering in the Chinese market the best period of rapid development, the German-owned Bank of Nanjing Water Corporation Baokang foreseen its broad market prospects, a large capital investment in the establishment of subsidiaries across the country are now looking for Drinking Water industry confidence in the future, interested in drinking water industry in the direct access to career success Friend join our team.

直饮水产业现在正迎来中国市场飞速发展的最佳时期,德国独资世保康水务南京总公司预见了其广泛的市场前景,投入大量的资金在全国范围内成立子公司,现诚征对直饮水行业前景充满信心,有志于在直饮水行业获得事业上的成就的朋友加入我们团队。

The analyses of the relationship between drilling parameter and rate of penetration was done,and the principle of coupled driven drilling by improving rotary speed of bit was revealed to increase bit rock-breaking energy to improve penetration rate.

分析了钻井参数与钻速的关系,揭示了复合钻井通过提高钻头转速,从而增加钻头破岩能量来提高机械钻速的机理;在分析井斜原因和钟摆钻具防斜打直原理的基础上,分析了直螺杆钻具和弯外壳螺杆钻具组合的防斜机理以及两者的联系与区别,指出在地层倾角较小时采用直螺杆钻具组合,地层倾角较大时采用弯外壳螺杆钻具组合,以达到防斜打快的目的。

Analysed a kind of specific straight carry model supply chain order goods politic cooperative model, straight carry supplying chain is to point to network of the supplier that is in upper reaches by and the supply that a certain number of downstream straight carry divide the composition that sell business, sale.

分析了一类特定的直运型供应链的订货策略的合作模型,直运型供应链是指由一个处于上游的供应商和若干下游的直运分销商组成的供应、销售网络。

Considering the problems of spurgear precise plastic forming, such as high deformation resistance, poor flowability and especial hardness to fill cant of gear, technological plan was developed based on precise plastic forming technique, successive control principle and consecutive local deformation theory. Moreover, structures of the rolling preform die and the die with up and down wellrounded forcer for stamping-extrusion and bulge-extrusion combining forming were designed too.

因此本文的主要研究内容和结果如下:本文以某种直齿轮:模数m=2,齿数z=20,压力角α=200,变位系数x=0为对象,针对直齿轮精密塑性成形变形抗力大,流动性差,特别是成形中齿轮角隅部分更加难以充满问题,基于精密塑性成形技术、逐次控制原理以及连续局部变形原理提出了&直齿轮滚轧制坯-镦挤、胀挤复合精成形&的工艺方案,设计了滚轧制坯的模具结构和上下冲头带圆角的镦挤、胀挤复合精成形的模具结构。

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And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47:5 法老对约瑟说,你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

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Hey Big Raven, The individual lies dont matter anymore - its ALL a tissue of lies in support of...

嘿大乌鸦,个别谎言的事不要再-其所有的组织的谎言,在支持。