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经验方程
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     Empirical equation of states
     经验性状态方程
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     On the Raigleigh's Curve Empiric Formula
     里莱曲线经验方程的探讨
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     dinger equation with harmonic potential.
     dinger方程.
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     dinger equation of nonlocal optical solitons, originating from photorefraction effect in undoped nematic liquid crystals applied dc bias-voltage.
     dinger方程
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     and b was empirical parameter.
     b为经验常数。
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In this article it is pointed out that the semi-empirical van der Waals' equation of state for gases is particularly unsatisfactory in the neighborhood of the critical point, as indicated by the fact that the experimental values of the critical ratio (?) seldom agree with the theoretical constant value 8/3. It is also noted that this τ value may serve as a satisfactory measure (at least to a first approximation) of the deviation of the law of corresponding states when applied to gases at high densities. We have...

In this article it is pointed out that the semi-empirical van der Waals' equation of state for gases is particularly unsatisfactory in the neighborhood of the critical point, as indicated by the fact that the experimental values of the critical ratio (?) seldom agree with the theoretical constant value 8/3. It is also noted that this τ value may serve as a satisfactory measure (at least to a first approximation) of the deviation of the law of corresponding states when applied to gases at high densities. We have therefore proposed in this communication a rather straightforward modification of the van der Waals' equation which leads to an empirical three-constant equation of state for gases involving this τ value as an adjustable parameter and thus requiring only critical data for the determination of the three constants. This equation is made to fit the p-V-T data at the critical point, but reduces itself to the simpler forms of the van der Waals' equation and the ideal gas equation for lower values of gas densities. Numerical calculations made for gases of widely different τ values show that this rather simple equation of state is fairly satisfactory even at high densities. The plausibility of using the τ value as an adjustable parameter both for the equation of state and for the law of corresponding states is also briefly discussed.

本文指出任何僅含兩個常數的氣態方程,在臨界點附近的缺點是特別顯著的。同時也指出,對應態定律應用到高密度氣體的偏差,可以相當滿意地用臨界係數(?)來衡量。因此我們建議將van der Waals方程,修改爲三常數的經驗方程,它的優點是這三個常數可以直接從氣體的臨界點數據計算出來;而且實例計算(包括極性很強和τ值很大的甲醇)說明它在相當大的温度和密度範圍內可以適用。將這個經驗式,寫成對比方程顯然含有臨界係數τ,就離開臨界點不太遠的氣體來說,這個函數關係可以相當满意地用本文方程總結出來。

The rate of formation of carbonaceous deposits on cadmium-calcium-phosphate catalysts was determined by metns of a quartz spring balance, and the results were interpreted.

为了探讨结焦因素对乙炔水合磷酸镉钙催化剂稳定性的影响,本文应用石英弹簧秤在常压微分流动体系中,于300-420℃和250-450℃的温度范围内分别研究了乙炔和乙醛在这种催化剂上的结焦动力学行为.找出抛物线经验方程表达了乙炔的结焦动力学.认为过程吸附平衡迅速建立,吸附层的结焦分解为其控制步骤,并以多层沉积的焦上结焦机理和由于焦层扩散阻滞的影响而使结焦速度同焦量成反比的假设,讨论了经验方程式的物理意义.实验表明,乙炔催化水合伴随有强烈的乙炔和乙醛在催化剂上的焦化作用.乙醛缩聚的沉积物发现有进一步的脱羧分解过程.催化剂表面吸附的水分子能显著抑制催化剂的焦化作用.乙炔结焦活化能比水合活化能大约低10Kcal/mol的数量级.

The empirical equation of adsorption thickness for water vapor are given. The data intabular form for the calculation of pore distribution by both equivalent model method andmodelless method as well as the converting table for the data of the two methods are alsogiven. The authors suggest a general method for pore structure analysis by water vaporadsorption.

本文:(1)给出了水蒸气在固体表面的吸附层厚的经验方程;(2)给出了等效模型法和无模型法计算孔分布以及两者相互换算的常用数据表;(3)提供了由水蒸气吸附进行固体孔结构分析的一般方法。

 
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