一种改进的程序分频器

对铷频标中的频率合成器内的程序分频器进行了设计，并介绍了改进后的程序分频器。实验结果表明，该程序分频器用于铷频标的频综器中性能指标满足要求。     

短时距加工方式实验研究

采用Ｈａｓｈｅｒ＆Ｚａｃｋｓ提出的时间信息自动加工不受任务干扰的标准，要求被试在一种干扰任务（数字判断）和两种干扰任务（数字判断与语词复述），这两种处理下对５个短时距进行比较，探讨短时距（小于５ｓ）认知的加工方式．研究结果表明，短时矩的信息加工是一种需要注意参与的控制加工     

温度场对自蔓延高温合成致密化的影响

在自蔓延高温合成（SHS）致密化工艺中，准确确定施压滞后时间是工艺控制的关键．施压滞后时间的上限值一般是根据SHS过程的坯块表面温度与时间关系曲线获得，难以真实地反映坯块内的温度变化．作者以传热学理论为基础，针对SHS－准热等静压过程，建立了燃烧产物内的温度分布方程，并以此解释了最终产物内密度分布存在差异和形状变化的原因．     

Studies on a series complexes of copper (II), zinc (II), cobalt (III) with Schiff base derived fromd-glucosamine and salicylaldehyde

Copper (II) zinc (II) cobalt (III) complexes with the Schiff base derived from salicylaldehyde andd-glucosamine were synthesized. These compounds abbreviated as SG, CuSG, ZnSG, CoSG were characterized by elemental analyses, IR, UV-Vis,¹H NMR and MS spectrum. ESR spectrum, magnetic susceptibility measured by Evans method for CuSG had also been done. It is suggested that the complexes in solution have pseudotetrahedral structure. It was found that SG would occur a photochemical reaction if a beach of 355 nm ultravisible light shone on its aqueous solution. The reaction was in further research. Supported by the National Natural Science Foundation of China Ye Yong: born in 1970, Ph. D graduate student     

The strong cooperativity of dioxygen binding by dicobalt (II) diporphyrin compounds in nonaqueous solution at room temperature

Thermodynamic data were determined for the reversible binding of O₂ to two compounds of dicobalt(II) di(meso-tetra-phenyl)porphyrin derivatives with different lengths of diamidoaliphatic bridge (abbreviated to Co₂PP₈ and Co₂PP₄) in N,N-dimethylformamide at room temperature. The partial pressure of dioxygen necessary for half-oxygenation (P _1/2) and hill coefficient (n) at 298 K were determined as follows:P _1/2=54.2 kPa,n=2.0 for Co₂PP₈ andP _1/2=6.8 kPa,n=1.8 for Co₂PP₄, respectively. The rate equations of reversible oxygen binding by Co₂PP₈ were determined and the reaction path was proposed. The results of ther-modynamic and kinetic studies indicate that there exists strong cooperative effect during oxygenation of the compounds. The ESR observation reveals that the dioxygen complexes formed in the solutions are of superoxo (Co-O ₂ ⁻ ) type. Supported by the Research Foundation of the State Education Commission of China Zhou Xiaohai: born in 1962, Ph.D. Associate professor     

Studies on syntheses of biscrown ether compounds

Multi-ester type biscrown ether compound(I) was prepared by the reaction of 6-bromoacetacetic ester dibenzo-16-crown-5(7) with phenyl-methyl ether-2,6-diformic acid potassium salt in anhydrous DMF at refluxed temperature, and color biscrown ether compound(II) was prepared by the reaction of 4′-aminobenzo-15-crown-5(12) with 2,2′(O-formoyl naphthyl)ethyl ether (9) in anhydrous ethanol at 40 C under N₂. New compounds(I, II) were characterized by IR,¹H NMR, MS and elemental analysis. Supported by the National Natural Science Foundation of China Niu Changrong: born in December, 12, 1938, Professor     

SYNTHESIS AND PURIFICATION OF N,N''''-E1S(P-CARBOMETHOXYBENZOYL)BUTANEDIAMINE(T4T-DIMETHYL)

T4T-dimethyl is commonly employed as hard segment when polyesteramide is produced. Polyesteramide is one of thermoplastic elastomers, like polyurethane which is composed of two different types of segments, usually referred to as soft and hard segments. The characters of hard segment have much influence on the properties of the polymer. To get the polyesteramide with high order, it is desirable to make T4T-dimethyl pure. In this paper, how to synthesize, to purify as well as to detect the purity of T4T-dimethyl are described in detail.     

1,4,6,9—四硝基—1,4,6,9—四氮杂双环[4,4,0]癸烷合成工艺改进

以乙二胺和乙二醛为原料，合成了１，４，６，９－四氮杂双环（４，４，０）癸烷（１），反应得率为７７．５％，母体化合物（１）在硝酸－乙酐体系中硝化，制得１，４，６，９－四硝基－１，４，６，９－四氮杂双环（４，４，０）癸烷（２），文中研究了合成母体化合物（１）的缩合总得率高达６４．０％，熔点为２２４￣２３０℃，文中研究了合成母体化合物（１）的缩合反应的机理和影响因素，讨论了母体化合物（１）硝化反应的影响     

Automatic Structural Synthesis for Planar Kinematic Chains Containing Higher Pairs

ＡｕｔｏｍａｔｉｃＳｔｒｕｃｔｕｒａｌＳｙｎｔｈｅｓｉｓｆｏｒＰｌａｎａｒＫｉｎｅｍａｔｉｃＣｈａｉｎｓＣｏｎｔａｉｎｉｎｇＨｉｇｈｅｒＰａｉｒｓＺｈａｎｇＰｅｉｙｕ（张培玉），ＪｉｎＤｅｗｅｎ（金德闻），ＬｉＧｕｉｘｉａｎ（李瑰贤）＋，ＨｕａｎｇＣ...     

逻辑功能与逻辑体制

对同一逻辑门电路，既可采用正逻辑体制，亦可采用负逻辑体制，还可采秀混和逻辑体制，选用何种逻辑体制，应视分析和设计逻辑电路的方便与否而定。