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Compounds IaIh were hydrogenated with PdC to give IIaIIh, and their hypoglycemic activity was evaluated with a glucose oxidase kit and insulin load test on normal mice.


A complex load shading parameter is set up to describe various load shading schemes.


The imaginary part of the load shading parameter describes the states of switches of load shading schemes while the real part is the corresponding amount of shaded load.


The procedure to search the operation with the least amount of shaded load for a feeder and a connected domain are detailed.


Results of analysis show that the direct load shading scheme under the most balanced topology is not always the optimal scheme.

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 The problem of large deflection of a clamped circular plate under uniform pressure is studied by the method of successive approximation in terms of the parameter representing the ratio of the center deflection to the thickness. The tedious numerical computations, involved in Way's power series solution are thus avoided. The yielding condition at the edge checks very well with the experimental results given by McPherson, Ramberg and Levy. The method may be easily extended to any other boundary conditions and... The problem of large deflection of a clamped circular plate under uniform pressure is studied by the method of successive approximation in terms of the parameter representing the ratio of the center deflection to the thickness. The tedious numerical computations, involved in Way's power series solution are thus avoided. The yielding condition at the edge checks very well with the experimental results given by McPherson, Ramberg and Levy. The method may be easily extended to any other boundary conditions and loading details.  本文所研究者,为一周缘夹紧之圆板,在匀布之侧向重压下所生之巨大挠曲。本文用圆板中点之挠曲距离与板厚之比率为参数,逐步求得本题之近似解答,藉此避免前人Way氏之幂级数法中繁重之数字计算。圆板周缘呈现委屈现象之条件,亦可求得,其结果与McPherson,Ramberg及Levy诸氏之实验,完全吻合。本法亦可适用于一圆板在其它周缘条件及其它荷重情况下之诸问题。  A spectrographic procedure for determining copper in concentrated iron ores has been worked out for routine analysis. The powder method is found to be satisfactory with a medium quartz spectrograph and an activated a. c. arc between carbon electrodes as light source. In order to minimize erratic burning of the sample, the electrodes are preburned for one minute and then loaded with a mixture of equal weight of the ore sample and carbon powder. The analysis pair of lines chosen are: Cu 2824.369 Fe 2824.67... A spectrographic procedure for determining copper in concentrated iron ores has been worked out for routine analysis. The powder method is found to be satisfactory with a medium quartz spectrograph and an activated a. c. arc between carbon electrodes as light source. In order to minimize erratic burning of the sample, the electrodes are preburned for one minute and then loaded with a mixture of equal weight of the ore sample and carbon powder. The analysis pair of lines chosen are: Cu 2824.369 Fe 2824.67 for copper contents ranging from 0.05 to 0.3%, and Cu 2824369 Fe 2828.813 for those between 0.3 and 1.0%. The results obtained spectrographically have been checked by wet chemical analysis, amongst 110 samples 80% of which the two methods checked within 0.02%.  我们尝试用光谱的方法协助解决分析大量铁矿精矿试样中微量铜(O.050.1％)的问题。采用了交流电弧碳电极粉末法,应用现有的设备(中型光谱仪、不纯碳电极、质量低的照相板)进行试验,找出了比较适当的激发条件和分析线对。把空白碳电极加以预燃并在铁矿试样中搀入适当分量的碳粉,可以基本上消减样品在燃烧中的喷爆现象。根据样品的燃烧曲线的研究,选择了适当的曝光时间,使分析的结果不受样品所含铜的化学组成状态的影响。 所选定的分析线对当含铜量在0.050.3％的范围内时是Cu2824.369Fe2824.67,当含铜量在0.31.0％的范围内时是Cu2824.369Fe2828.813。根据所得的两条定标曲线作了110个样品的分析,光谱分析结果与化学分析结果的差值在0.02％以下的约占分析样品总数的80％左右。关于含铜量为0.050.3％的样品,光谱分析已经可以代替化学分析,并节省大量的人力和物资。  The purpose of this paper is to discuss Prof. method of analyzing twoway reinforced concrete slab. This method is based upon the equilibrium of forces under ultimate loading, and consequently the effect of plasticity of the material is included in consideration. If we use this method to design two way reinforced concrete slab, We should not only have much saving of steel, but also a saving of labour in computation. No matter that the slab is continuous over how many spans of unequal lengths, it can be... The purpose of this paper is to discuss Prof. method of analyzing twoway reinforced concrete slab. This method is based upon the equilibrium of forces under ultimate loading, and consequently the effect of plasticity of the material is included in consideration. If we use this method to design two way reinforced concrete slab, We should not only have much saving of steel, but also a saving of labour in computation. No matter that the slab is continuous over how many spans of unequal lengths, it can be easily analyzed, one by one, as a single span slab.  本文的目的是介紹蘇聯格娃斯捷夫教授的計算双向板的公式。這個公式是考慮板在極限平衡狀態,考慮了材料的塑性。用此方法計算雙向板,不但鋼筋經济而計算簡便。無論是多跨的板或不等跨的板,都可以视為單跨板來考虑,本文討論了格娃斯捷夫公式的基本理論,並将此理論应用到不規则形狀板的计算方面。   << 更多相关文摘 
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