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strain
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     The strain of B.N.
     N .
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     STRAIN ADJUSTMENT
     应变平差
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  strain
An antibiotic producing strain Streptomyces violaceusniger was isolated from soil sample, characterized and studied for antibacterial and antifungal activity profile.
      
However compounds 23-27 possess potent activity against Klebsiella pneumonia, a Gram-negative bacterial strain, compared to the standard drug used, ciprofloxacin.
      
A white-light interferometric fiber-optic sensing network based on the double-ring topology is demonstrated, which can be applied to the measurements of quasi-distributed strain and temperature in a smart structure.
      
Interface transferring mechanism and error modification of embedded FBG strain sensors
      
As the strain sensing element of a structural health monitoring, the study and the application of the fibre-optic bragg grating (FBG) have been widely accepted.
      
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This paper investigates the general and complete form of slope-deflection equations used in structural analysis. The word "complete" indicates that all the possible deformations (deflections and rotations) and all the strain energies (due to shear, direct stress and flexure) are included in the equations. The definitions, numbers, and relations of member constants are then discussed and the general equations for computing these constants are given. By neglecting the factors of minor importance, the general...

This paper investigates the general and complete form of slope-deflection equations used in structural analysis. The word "complete" indicates that all the possible deformations (deflections and rotations) and all the strain energies (due to shear, direct stress and flexure) are included in the equations. The definitions, numbers, and relations of member constants are then discussed and the general equations for computing these constants are given. By neglecting the factors of minor importance, the general form is reduced to the usual slope-deflection equations. Some special forms of such equations which are useful in certain practical problems are also discussed briefly, such as the slope-deflection equations including the effect of direct stress on flexure and the slope-deflection equations of semi-rigid frames. Slope deflection equations for trussed bents are also presented.

本文旨在:(1)提出完全的角变位移方程,使可精确的解算任何形式的平面刚构,只要其能视为由若干桿件组成即可。这里的所谓“完全”,系指方程中已包括一切可能的形变值在内,而且包括轴向应力及剪应力之影响。(2)全面的讨论桿件常数的定义、数量和相互关系,并供给计算各常数的最一般性公式。(3)将上述全面的和精确的公式逐步简化,以便与目前常用的公式比较。(4)讨论某些特殊情况。

By means of Friedel-Crafts reaction, the following compounds were prepared from 4-methyl- imidazolone-2 and four different ω-carbethoxy acyl halides: 4-methyl-5-(δ-carbethoxy-γ-methyl- butyryl)-imidazolone-2, 4-methyl-5-(δ-carbethoxy-γ, γ-dimethylbutyryl)-imidazolone-2, 4-methyl- 5-(ω-carbethoxy-n-nonanoyl)-imidflzolone-2, and 4-methyl-5-(ω-carbethoxy-n-heptadecanoyl)- imidazolone-2. With PtO_2 as catalyst, they were readily reduced to the four corresponding imidazolidone compounds. These compounds were hydrolyzed...

By means of Friedel-Crafts reaction, the following compounds were prepared from 4-methyl- imidazolone-2 and four different ω-carbethoxy acyl halides: 4-methyl-5-(δ-carbethoxy-γ-methyl- butyryl)-imidazolone-2, 4-methyl-5-(δ-carbethoxy-γ, γ-dimethylbutyryl)-imidazolone-2, 4-methyl- 5-(ω-carbethoxy-n-nonanoyl)-imidflzolone-2, and 4-methyl-5-(ω-carbethoxy-n-heptadecanoyl)- imidazolone-2. With PtO_2 as catalyst, they were readily reduced to the four corresponding imidazolidone compounds. These compounds were hydrolyzed with 1 N NaOH and then followed by acidification to give the following acids: 4-methyl-5-(δ-carboxy-y-methylbutyl)- imidazolidone-2, 4-methyl-5-(δ-carboxy-γ, γ-dimethylbutyl)-imidazolidone-2, 4-methyl-5-(ω-car-boxy-n-nonanyl)- imidazolidone-2, and 4-methyl-5-(ω-carboxy-n-heptadecanyl)-imidazolidone-2. Microbiological tests indicated that the first three acids are good anti-biotins towards lactobacillus casei and saccharomyces cerevisiae strain No. 139. Due to its extreme insolubility in water, the last compound has not yet been tested for its microbiological activity.

(1)利用Friedel-Crafts反應,由4-甲基-2-氧代-二氫化咪唑及四個不同的醯氯羧酸酯,得到下列四個化合物:4-甲基-5-(δ-乙氧羰基-γ-甲基丁醯)-2-氧代-二氫化咪唑,4-甲基-5-(δ-乙氧羰基-γ,γ-二甲基丁醯)-2-氧代-二氫化咪唑,4-甲基-5-(ω-乙氧羰基-正壬醯)-2-氧代-二氫化咪唑及4-甲基-5-(ω-乙氧羰基-正十七醯)-2-氧代-二氫化咪唑。 (2)用Cr_(2)O_3精製過的乙酸爲溶劑,PtO_2爲觸媒,這四個4-甲基-2-氧代-二氫化咪唑的衍生物,很順利的吸收相當於3分子的氫,還原為相對應的4-甲基-2-氧代-四氫化咪唑的衍生物,水解後得到下列四個酸:4-甲基-5-(δ-羧基-γ-甲基丁基)-2-氧代-四氫化咪唑,4-甲基-5-(δ-羧基-γ,γ-二甲基丁基)-2-氧代-四氫化咪唑,4-甲基-5-(ω-羧基-正壬基)-2-氧代-四氫化咪唑及4-甲基-5-(ω-羧基-正十七基)-2-氧代-四氫化咪唑。前三者已作過初步的微生物效應試驗,對於lactobacillus casei及saccharomyces cerevisiae都有顯著的反促生素效應。第四個化合物因為...

(1)利用Friedel-Crafts反應,由4-甲基-2-氧代-二氫化咪唑及四個不同的醯氯羧酸酯,得到下列四個化合物:4-甲基-5-(δ-乙氧羰基-γ-甲基丁醯)-2-氧代-二氫化咪唑,4-甲基-5-(δ-乙氧羰基-γ,γ-二甲基丁醯)-2-氧代-二氫化咪唑,4-甲基-5-(ω-乙氧羰基-正壬醯)-2-氧代-二氫化咪唑及4-甲基-5-(ω-乙氧羰基-正十七醯)-2-氧代-二氫化咪唑。 (2)用Cr_(2)O_3精製過的乙酸爲溶劑,PtO_2爲觸媒,這四個4-甲基-2-氧代-二氫化咪唑的衍生物,很順利的吸收相當於3分子的氫,還原為相對應的4-甲基-2-氧代-四氫化咪唑的衍生物,水解後得到下列四個酸:4-甲基-5-(δ-羧基-γ-甲基丁基)-2-氧代-四氫化咪唑,4-甲基-5-(δ-羧基-γ,γ-二甲基丁基)-2-氧代-四氫化咪唑,4-甲基-5-(ω-羧基-正壬基)-2-氧代-四氫化咪唑及4-甲基-5-(ω-羧基-正十七基)-2-氧代-四氫化咪唑。前三者已作過初步的微生物效應試驗,對於lactobacillus casei及saccharomyces cerevisiae都有顯著的反促生素效應。第四個化合物因為在水中溶度太低,故尚未能作它的微生物效應試驗。

The present paper treats the compression of a rectangular block between two parallel rough plates as a problem in the theory of plane strain for perfectly plastic-rigid materials.At first, the plastic-rigid theory of plane strain was outlined, then, the solution to the present problem is briefly surveyed. In section 4, the case that is left out in the present literature, viz. when the width-height ratio lies between 1 and 3.64 for partially rough plates is solved. In this treatment, the coefficient...

The present paper treats the compression of a rectangular block between two parallel rough plates as a problem in the theory of plane strain for perfectly plastic-rigid materials.At first, the plastic-rigid theory of plane strain was outlined, then, the solution to the present problem is briefly surveyed. In section 4, the case that is left out in the present literature, viz. when the width-height ratio lies between 1 and 3.64 for partially rough plates is solved. In this treatment, the coefficient of friction ν is considered as constant along the contact surfaces. For eachμ, a critical value of the ratio w0/h is given. When w/h

本文将平行刚性压板间的塑性流动问题作为理想刚塑性的平面应变问题处理;先简单的复习理想刚塑性的平面应变问题,然后对本问题已做的部分作简短的介绍,再处理了现在还未解决的情形,那就是:当1

 
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