MX—NX2和MX—NX3电解质水溶液的热力学研究

本文用Pitzer方程研究相同阴离子的非对称性混合电解质溶液的热力学性质,讨论了高次静电项(~Eθ_(ij)、~Eθ′_(ij))所产生的效应。引入混合参数(θ_(ij))和离子强度(Ⅰ)的关系式,估算了25℃时MX-NX_2和MX-NX_3电解质水溶液的Pitzer混合参数~Sθ_(ij)~(0)、~Sθ_(ij0~(1)和φ_(ij)k,其计算值和文献值吻合。     

从祝由看古代巫术的医疗作用

医史学界对古代的巫术普遍地采取了全盘否定的态度，但从巫医采用最多的祝由术来看，却有心理疗法、体育疗法、气功疗法的科学内涵，并逐渐发展为医学的辅佐。在医学水平十分低下的古代，巫术为人类的健康作出过一定的贡献。     

探索中小套型住宅设计的方向

本文通过分析我国中小套型住宅需求状况,针对设计中的主要误区,提出进行合理规划设计构想,并对发展趋势进行展望.     

热烈庆祝平顶山学院建校三十周年

群贤毕至，锦云天章；宾朋济济，共襄盛典。2007年12月28日，平顶山学院隆重庆祝30周年华诞。在此，我们向长期以来关心、支持学校建设与发展的各级领导、各界朋友和海内外广大校友致以诚挚的问候和崇高的敬意。三十春秋显身手，中兴盛世求创新。平顶山学院经过30年的砥砺奋进，从1977年建立平顶山师范大专班，到1984年成立平顶山师范专科学校，1992年更名为平顶山师范高等专科学校，再到2004年建立平顶山学院，已发展成为一所全日制综合性普通本科高校。学校现占地面积2145．7亩，建筑面积40万余平方米，馆藏图书81万册，电子图书16万种。…     

Temperature－Dependent Photoluminescence of ZnTe Films Grown on Si Substrates

ZnTe films have been prepared on Si substrates by metal-organic chemical vapour deposition (MOCVD), and the temperature-dependent photoluminescence (PL) properties were investigated. The near-band-edge (NBE) emission of the ZnTe sample at 83K shows an asymmetry line shape, which can be decomposed into two Gaus-siam lines labelled by FE and BE. Temperature-dependent PL intensity of the NBE peak shows two variation regions, and an expression with two dissociation channels fits well to the experimental data. The results of the temperature-dependent full width at half maximum (FWHM) and peak energy were well understood under the framework of the two-dissociation-channel model. That is, at low temperature, the emission from bound excitons governs the NBE peak, while above 157K, the free exciton emission becomes dominant gradually. A simple model with three energy levels was employed to describe the variation in emission intensity of BE and FE with temperature.     

Finite Mixture Normal Models, with Application to Dose-Response Studies

In this paper, we consider the risk assessment problem under multi-levels and multiple mixture subpopulations. Our result is the generalization of the results of [1-5].1 Finite Mixture Normal ModelsIn dose-response studies, a class of phenomena that frequently occur are that experimental subjects (e.g., mice) may have different responses like 'none, mild, severe' after a toxicant experiment, or 'getting worse, no change, getting better' after a medical treatment, etc. These phenomena have attracted the attention of many researchers in recent years. Finite     

位圆上的Hankel和Toeplitz型算子

令D是复平面上的单位圆, 为其加权的测度, 则 为正交直和分解. 定义了一类Hankel和Toeplitz型的算子, 研究了它们的有界性、紧性和Sp准则.