三取代钨锗杂多化合物的导电性

合成了3A金属取代的钨错杂多化合物：α－GeW9M3（M＝A1，Ga，In）。通过元素分析、红外、紫外、183WNMR以及热分析手段进行了表征。测定了电导率。结果表明：所合成的杂多化合物热稳定范围宽，不易失水，将是一类新型固体电解质。     

面向动态精密测微的误差修正技术

本文阐述在精密测微时，对采样数据进行误差修正，可减小或消除随机误差影响，提高测量精度。     

论供求调整下的价格歧视

价格歧视是日常生活中常见的经济现象。实行有效的价格歧视的过程是一个内生的、动态的过程,它要受多方面因素的制约。生产者应根据不同的市场状况适时调整产品价格组合,引导消费者的选择,满足市场需要。     

电荷转移型导电配位化合物的研究现状及热点

简述了电荷转移型导电配位化合物的产生、发展、导电机理、研究现状、热点及其发展趋势。     

High-performance flexural fatigue of carbon nanotube yarns

Carbon nanotube yarns （CNTY） possess good specific strength and specific conductivity. As such, their potential for commercial applications is significant. Fatigue performance is a significant consideration in yarn/wire applications. In this study, the flexural fatigue performance of CNTY spun from super-aligned carbon nanotube arrays was investigated using a reversed bending test. The results showed that CNTY exhibited excellent resistance to pure flexural fatigue, significantly outperforming stainless steel wire; CNTY failed where a combination of flexural fatigue and tension-tension fatigue had special hollow fracture morphology, and CNTY resistance remained fundamentally unchanged in the combination fatigue process.     

Microstructure and properties of in-situ synthesized Cu-1 wt%TiC alloy followed by ECAP and post-annealing

A dispersion-strengthened copper alloy with 1 wt% TiC for commercial electrical-contact wires was prepared by in-situ reaction casting, grain-ultrafining by equal-channel angular pressing (ECAP) and subsequent annealing with aim to obtain excellent comprehensive performance. The results showed that fine TiC particles were in-situ synthesized in the as-cast Cu matrix and aggregated in clusters, and thus mechanical properties of the as-cast alloy deemed insufficient. Continued ECAP at 473 K significantly refined the grains of the as-cast alloy and improved the distribution of TiC particles. Due to multiple strengthening mechanisms, the ECAP-processed alloys maintained good conductivity with obviously enhanced tensile strength and hardness values. After post-ECAP annealing, the elongation and conductivity of the fine-grained copper alloy increased with the adequate tensile strength. The novel combined process endows the alloy appropriate performance to serve current high-frequency electrification railway systems.     

基于EKC假说的经济发展与自然保护区关系分析

 利用计量经济学模型对我国各省的自然保护区面积与经济发展、人口密度的关系进行了分析。结果表明,我国自然保护区的发展符合环境库兹涅茨曲线假说,变化的拐点处于人均GDP为2.5万~3.2万元之间。仅北京、天津、上海、浙江与江苏已越过拐点,广东、山东、辽宁、内蒙古和福建处于拐点区间内,甘肃、四川、青海与吉林虽然没有越过拐点,但自然保护区建设情况较好,而海南,贵州的自然保护区面积偏低。     

非简谐振动对二维系统玻意耳线的影响

利用Collins模型,以氩为例,计算了在各种不同条件下二维系统的热力学函数.研究了二维系统在存在空位的情况下,原子不动、或平动、或作非简谐振动等情况的临界温度、玻意耳温度和玻意耳线等.所得的结果同由经验方程求得的结果相类似,与实际系统的实验值相近.     

不完全寿命数据威布尔分布三参数估计法

提出一种不完全寿命数据成布尔分布三参数的估计方法，并对此方法进行了大量ＭｏｎｔｅＣａｒｌｏ模拟检验，结果表明其估计值与母体真值符合较好。     

以谱带比作二组份体系红外光谱自动定量分析

通过甲苯、甲乙酮二组份体系的红外光谱定量分析，编制了进行二组份体系自动定量分析的ＯＢＥＹ程序．该程序通过非线性曲线拟合，两次回归分析确定出标准方程，并利用此程序测量了甲苯、乙苯这一体系的含量，结果较好。