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code
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  128条码
     An Encoding Analysis and a Recognition Algorithm of the Bar Code 128
     128条码的编码分析和识别算法
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  相似匹配句对
     M and 128 ?
     M、128 ?
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     128,No.
     128、No.
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     Histone Code
     组蛋白密码
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     On Hammurabi Code
     《汉穆拉比法典》评析
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     An Encoding Analysis and a Recognition Algorithm of the Bar Code 128
     128条码的编码分析和识别算法
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The investigation of the properties of loess constitutes a highly specialized branch of soil engineering. The design and construction of foundations and earthwork in this soil involve many uncertainties that have not been solved. Among all uncertainties the following are considered the most important items:(1) the changes of bearing capacities caused by variations in the strength of the cohesive bond due to changes in its moisture content, and(2) the methods of ascertaining the amount of its settlement under...

The investigation of the properties of loess constitutes a highly specialized branch of soil engineering. The design and construction of foundations and earthwork in this soil involve many uncertainties that have not been solved. Among all uncertainties the following are considered the most important items:(1) the changes of bearing capacities caused by variations in the strength of the cohesive bond due to changes in its moisture content, and(2) the methods of ascertaining the amount of its settlement under the combined action of foundation loads and of percolating water.In order to prevent foundations against settlement the "Provisional Code for the Design of Natural Foundations" gives a set of rules of precautions for designers to observe, which include the prevention of water from getting into the foundations, artificial strengthening of the soil and the designing of superstructures in such a way that they will adjust themselves to settlement. Before the adoption of any of such precautions could be decided, the accuracy in evaluating the amount of possible settlement of the soil is a problem of prime importance, which unfortunately cannot be satisfactorily obtained.This paper attempts to give some predominent characteristics of loess, the points of contradiction between the assumptions made in the old designing code and the results derived from actual work, a comparison of the salient features of the old code with the new code of ordinance of the U. S. S. R., 1955, and some suggestions regarding further developments of this branch of soil engineering. Several cases of actual construction work in loess in recent years are also cited which, owing to our incomplete knowledge of the soils, nature, have inevitably either caused unnecessary expenses to the works, or brought about results detrimental to the stability of structures.In this branch of soil engineering have, therefore, many difficulties yet to be contended with. It is hoped that this paper could be of some reference value to research engineers in this line and the knowledge of loess be further developed in view of the increasing pressure of necessity in our present construction work.

黄土工程特性的研究,是目前土壤力学一个重要部門。有关黄土区的地基与土工工作、我們經常根据“天然地基設計暫行規范”上条文来設計,但对於基土沉陷量的估計,往往不易准确,而造成工程上的困难与事故。这是現时没有得到解决的問題。本文闡述黄土的若干特性,旧規范条文上的缺点,苏联1955年批准的“建筑法規”内改善黄土部分条文的意义,以及目前国内研究与發展的方向。其中主要說明黄土由於荷載及含水量兩項的綜合影响对其沉陷性能上所發生的变化,以及估計这項变化较合理的方法,以期在研究工作上作进一步的認識。

By an analysis of local temperature change on different isobaric surfaces,it is pointed out inthis study that a three parameter model is often neccessary for prediction of major weather deve-lopment.A case of the formation of blocking situation west of Ural is studied.The tendencycomputed with a three parameter model is in good agreement with the observed tendencyduring the critical moment of the formation of the blocking over that area,which is not fore-casted by a one or two parameter model.A forecasting rule...

By an analysis of local temperature change on different isobaric surfaces,it is pointed out inthis study that a three parameter model is often neccessary for prediction of major weather deve-lopment.A case of the formation of blocking situation west of Ural is studied.The tendencycomputed with a three parameter model is in good agreement with the observed tendencyduring the critical moment of the formation of the blocking over that area,which is not fore-casted by a one or two parameter model.A forecasting rule is found by solving the equations for the three parameter model appro-ximately.It states that the height of an isobaric surface rises when cold(warm)advectionincreases(decreases)upward,and falls when the cold(warm)advection decreases(increases)upward.The neccessity and difficulty for higher approximation,to the true wind is discussed.It isfound that the available wind data given in the present code is not sufficiently accurate for thedirect evaluation of the wind divergence.In solving Poisson equation a pattern of group relaxation is designed.

作者首先根据温度局地变化的分析说明三层模式常常是必要的。然后作者用较普遍的准地转三层模式,试算了大范围高空温压场的倾向。所计算的是乌拉尔阻塞流型发展关键时刻的例子。作者的计算结果说明这种阻塞流型形成的预报必须使用三层模式,主要是因为与阻塞流型中高、低压切断有关的负变高,只有使用三层模式才报得好。根据三层模式的公式,作者并求出大范围天气系统发展的规则:即冷(暖)平流向上增强(减弱),那末等压面的位势高度升高(低槽减弱、高压脊加强);冷(暖)平流向上减弱(增强),那末等压面的位势高度降低(低槽加强、高压脊减弱)。也就是说,—舵所接受的暖平流使脊加强,冷平流使槽加深这规则是有条件的。作者还指出风场的逼近的需要和困难。特则是现有高空风观测和电码难以直接用来计算辐散。在计算方面作者给出了一个对 Poisson 方程适用的成群放松的格式。

In this paper some major contents and peculiarities of the new Soviet code of steel structural design are at first presented, and then some explanation and discussion on the design formulas of buckling problems are also included.

本文首先介绍新的苏联钢结构设计规范(НИТУ 121-55)的主要内容及其特点,然后对于规范中结构设计的计算部份,特别是关于结构稳定方面,作一些说明和讨论。

 
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