饱和标准电池电动势-温度系数的精确测定

通过精确测试,本文提出了一个在0—40℃范围内适用的饱和标准电池电动势-温度公式. E_t=E₂₀-[39.94(t-20)+ 0.929(t-20)² -0.0090(t-20)³+0.00006(t-20)⁴]×10^-6伏.由于试验电池比国外同类的试验电池多。得到的α值的极差小,所以准确度比国外得到的系数要高.     

Nanoscopic surface patterns of diblock copolymer thin films

The surface topography of thin diblock copolymer films is studied by atomic force microscopy (AFM). With AFM an island-to-ribbon transition is observed for symmetric polystyrene-b-poly (4-vinylpyridine) (PS-b-P4VP) on mica with increasing solution concentration. Our study also demonstrates how the formation of the pattern strongly depends on the copolymer composition based on the volume fraction. The substrate and solvent used both have great effects on the morphology of the thin films. Only by using highly polar substrate (mica), can we gain regular pattern. The reason why the regular islands cannot be obtained with symmetric PS-b-P4VP on graphite is also explained. On mica using nonselective and selective solvents, a rather regular pattern can be obtained. The difference is only in the solution concentration for forming regular patterns.     

Design, Fabrication and Measurement of Ni/Ti Multilayer Used for Neutron Monochromator

Ni/Ti multilayers, which can be used for neutron monochromators, are designed, fabricated and measured. Firstly, their reflectivities are simulated based on the Nevot-Croce model. Reflectivities of two Ni/Ti multilayer mirrors with periods d = 10.3 nm （M1） and d = 7.8 nm （M2） are calculated. In the calculation, the reflectivity of the Ni/Ti multilayer is taken as a function of the gazing angle with different roughness factors δ =1.0 nm and = 1.5 nm. Secondly, these two multilayers are fabricated by the direct current magnetron sputtering technology. Thirdly their structures are characterized by small-angle x-ray diffraction. The roughness factors are fitted to be 0.68 nm and 1.16nm for M1 and M2, respectively. Finally their reflective performances are measured on the V14 neutron beam line at the Berlin Neutron Scattering Centre （BENSC）, Germany. The experimental data show that the grazing angle of the reflected neutron intensity peak increases, but the reflected neutron intensity decreases, with the decreasing periods of the multilayers.     

数字光处理背投电视色度学特性的研究

以色度学的基本理论为基础,结合数字光处理光学引擎的工作原理,探讨了单片式数字光处理光学引擎的彩色显示原理和色温调节原理.提出了单片式数字光处理光学引擎色度学特性的理论计算公式,并利用该公式对夏新DL52HWT型投影电视光学引擎的显示三原色色度坐标、白场平衡的色度坐标和相关色温以及颜色复现误差等色度学特性进行了计算和分析,并对理论计算公式进行了验证.     

用PAR作显色剂光度法研究铼（Ⅶ）在双水相萃取体系（聚乙二醇2000-硫酸铵）中的分配行为

以4-（2-吡啶偶氮）-间苯二酚（PAR）为显色剂,用光度法研究了铼（Ⅶ）在聚乙二醇2000（PEG）-硫酸铵双水相萃取体系中的分配行为。萃取系在有一定量铼标准溶液存在,且含有300g·L~（-1）聚乙二醇2000溶液及300g·L~（-1）硫酸铵溶液各3mL及1g·L~（-1）PAR溶液1mL,并用磷酸盐缓冲溶液控制...     

二次域Q（√7）的单位给出的三角数及相关的不定方程问题

研究了二次域Q（√7）中单位Vn＋Un√7）=（8＋3√7）n所给出的两个递归数列{Vn},{Un}中的三角数问题,找到了{Vn},{Un}中的所有的三角数.作为应用,给出了与其相关的两个不定方程的整数解.     

立体影像显示原理及其技术发展

阐述了立体显示的原理,着重介绍了处于研究热点的光学板遮挡、体积型立体显示和电子全息立体显示技术的原理及其技术发展状况.     

集值映射的广义重心选择

给出了广义重心选择的一些结论.对任意r∈R+我们给出了具有紧凸像的映射F的一个选择.并且如果F的像不是凸集我们同样给出了一个选择.     

k紧优双环网的无限族的构造

双环网是计算机互连网络和通讯系统的一类重要拓扑结构,已广泛应用于计算机互连网络拓扑结构的设计中.利用L形瓦理论,结合中国剩余定理和二次同余方程的性质,给出了不同于参考文献中的任意k紧优双环网的无限族的构造方法,证明了对任意正整数k,若n(t)=3t2 At B,A=1,3,5,对于一定的B＞(k 1)2,均存在正整数t,使得{G(n(t);s(t))}是k紧优双环网的无限族,而且这样的无限族有无穷多类.作为定理的应用,给出了多类新的k紧优双环网的无限族.