The Electronic Absorption Spectra of Binuclear Complexes,[Cu(o-phen) (sal)No3 and [Cu2 (sacch)4(im)4] Crystal

The electronic absorption spectra of crystals of the title componds were recorded and the experimental results were explained quantitatively with the ligand field theory and the radial wave function of bound Cu(II) cation. With these spactra, the range of magnetic interactions between two Cu(II) ions of the title compounds are discussed.     

Spectra Studies of Complexes Between Palladium (II), Nickel (II) and Amino Acids

The complexes of Ni (His) 2·H2O, Ni (Gly) 2·2H2O, Pd (His)Cl2·H2O and Pd(Gly) 2·2H2O were synthesized. And the IR, electronic absorption and photoacoustic spectra of these complexes were measured in solid state. The nature of the metal-carboxylate coordinate bond were deduced from the variation in the carboxyl stretching frequencies. And the d-d transition absorptions of these complexes were interpreted quantitatively with the 3d scaling radial theory. Therefore, the structural characterizations were also discussed with their spectral behaviors.     

Physico-Chemical Characterization of Yu Guo Beads(1100-771 B. C. ) in China

When was the earliest glass produced in China? This has still been a question so far. Some archaeologists have thought that Yu Guo beads are real glass, the earliest glass(1100-771 B. C. ) in China. However, more details of scientific investigations in this paper show that Yu Guo beads are mainly made of clastic quartz (>95%) with a small amount of clay and sintered under the low temperature(500-600℃). It is not a glassy body, but a kind of polycrystal ornaments.     

一次引爆型固相FAE云雾爆轰半径的研究

研究了氧平衡及爆炸下极限条件对燃料空气炸药（Fuel Air Explosive,FAE）云雾爆轰半径的影响。由固相FAE燃料的氧平衡及爆炸下极限条件,导出一次引爆型固相FAE云雾爆轰半径计算公式,并从理论上给出了FAE云雾爆轰半径的范围。通过对FAE爆炸场超压的测量及对FAE爆炸过程高速摄像分幅照片的定量分析,得到一次引爆型固相FAE的云雾爆轰半径,并将其与计算的云雾爆轰半径进行了对比,计算的云雾爆轰半径与试验值是一致的。研究结果表明,FAE燃料负氧越多,对应的云雾爆轰半径值越大;燃料爆炸下极限值越小,对应的云雾爆轰半径值越大,且固相FAE的爆轰半径不超过爆炸下极限条件爆轰半径。FAE中的高效燃料可以通过氧平衡以及爆炸下极限条件来选择,以此提高FAE的功率。     

煤粉起动速度与粒径及湿度的关系

在煤码头和车站的煤堆积场上,煤粉的扬起是污染环境的主要原因之一.作者根据力学的基本原理,考虑颗粒和液滴重力、煤粉颗粒尺寸和湿度的影响,利用煤粉颗粒起动时的力平衡条件,推导出在风的作用下,具有一定湿度的煤粉颗粒开始扬起的起动风速的理论表达式.最后.根据煤粉起动速度与煤粉颗粒粒径及湿度的关系,将理论公式和风洞实验结果进行了比较,理论和实验结果符合得相当好.     

密相两相流基本方程组的封闭性和分散相在壁面处的剪应力

本文对将连续相和分散相分别作连续介质考虑的两相流基本方程组,通过分析密相下两相流动的物理机制,提出了分散相的应力满足宾汉流体的本构方程,并用分散相在壁面处剪应力作为分散相的一个边界条件,从而得到了一个封闭的处理密相系统的两相流数学模型.最后,还讨论了分散相在壁面处剪切力的表达式.     

The relation of the threshold velocity of coal dust to its size and humidity

On the ground of wharf and a station where coal is piled up,the sources polluting theatmosphere are mainly the raised coal dust.According to the principle of mechanics,withthe consideration of the gravities of coal dust particles and liquid droplets,coal dust size andhumidity,under the condition of force balance when the coal dust was raised,the authorsobtained a theoretical formula for the threshold velocity of coal dust with humidity.Finally,the theoretical values from the formula gave a good agreement with the experimental datafrom some wind tunnels.     

三涡旋模式理论中小涡旋的二元和三元速度关联函数和网格湍流的衰变*

在三种涡旋分开考虑的湍流模式[1,2]里,我们用到了小涡旋的二元和三元速度关联函数。本文对小涡旋的二元和三元速度关联函数进行了讨论,并且对它们展开式的头几项中常用到的系数给出了表达式,最后,用它们讨论了网格湍流的衰减问题.计算结果与G.K.Batchelor和A.A.Townsend的实验[3]相符合得很好.     

Pressure measurements on cone surface in 3-D shock reflection processes

In a shock tube the pressure distribution was measured on a cone with an angle of attack when a shock wave passed the cone. The cone has a semi-apex angle of 35°, the angle of attack varied from 0° to 25° and the shock Mach numbers from 1.05 to 3.0. A series of pressure distributions on the cone circumference are given. Received 17 November 1997 / Accepted 5 December 1997     

A penalty-equilibrating hybrid stress 3-D element

This paper presents a theory about penalty-equilibrating(PEQ) hybrid element of three dimensions (3-D), and generates a model for the PEQ hybrid stress 3-D element. By the PEQ approach, the false stress is avoided and the precision in calculation is raised to a large extent under the mesh distortion condition without another additional degree of freedom. In the results of numerical examples, the present element is compared with the 8-node hexahedron element and the optimized hybrid element, and it is proved that our conclusion is correct. In addition, the penalty-equilibrating hybrid 3-D element is taken as a trial to calculate problems of square plate bending and incompressibility. The results obtained are satisfactory.