包覆状态下的大块Pb晶体的动力学过热

研究了非自由表面大块晶体Pb的过垫热，主要介绍通过有效的方法制得试样，然后，用DSC-7准确测量大块晶体Pb在不同加热速度条件下的过热度，从而得出大块晶体Pb能够产生动力学过热。     

低温Al2O3悬浮电解新工艺的研究

A new process of low temperature Al2O3 suspension electrolysis for produc-ing aluminum in low melting point fluo-chloride system was investigated. Current efficiency (η) expres-sion deduced from experiments on 20～80A electrolysis cell showed that main effects on η are the cell current and the surface of aluminum produced．Increasing cell current and diminishing aluminum surface can both make η increase. On an electrolysis cell of about 100A capacity with the fine γγ-Al2O3 (media diam.1.22μm) and the mixture in which F－/C1－molar ratio was 1 at 750℃，aluminum metal was obtained with 86.3% current efficiency and 11.73kWh specific energy consumption.     

微分中值定理在n维欧氏空间中的推广

本文将微积分中关于一元函数的微分中值定理，即Ｒｏｌｌｅ定理，Ｌａｇｒａｎｇｅ定理，Ｃａｕｃｈｙ定理，推广到了多元函数及向量值函数。     

MoSi2对二硼化钛惰性阴极材料性能的影响

用冷压烧结法制造了二硼化钛惰性阴极，研究了MoSi     

含酰胺基团氯化稀土配合物的合成和表征

合成了未见文献报道的氯化稀土丙烯胺配合物（ＬｎＣｌ３·３ＰＡ），剖析了ＬｎＣｌ３·３ＰＡ和聚（苯乙烯－丙烯酰胺）负勒氯化稀土配合物（ＳＡＡ·ＬｎＣｌ３）的红外光谱和电子能谱。结果表明，含酰胺基团的配体均通过与羰基氧与稀土离子配位。     

2种制造/安装偏差对高速车辆方向稳定性的影响

为改善高速车辆的方向稳定性,研究了左右轴距不等及车身纵轴线与前后车轴中点连线不重合的2种制造/安装偏差,及其导致车辆高速行驶时出现跑偏现象的机理及相关影响.建立了这2种制造/安装偏差导致高速车辆发生跑偏运动的动力学模型,推导出其状态方程,并通过数值仿真定量解析了这2种制造/安装偏差对车辆高速方向稳定性的影响.研究结果表...     

Distributed modeling of the beginning and ending dates and durations of limited temperatures over the rugged terrain of Chongqing

A physically based empirical model was established for the beginning and ending dates (BED) of limited temperatures.Data used were daily mean temperatures from 34 conventional stations in the Chongqing region,measured from 1961 to 2000.Using this model in combination with the distributed modeling results of monthly mean temperatures,we developed a method for creating a distributed simulation of the BED and durations of limited temperatures in the rugged terrain of Chongqing.Spatial distribution maps were generated at a resolution of 100×100 m for the BED and durations of the limited temperatures of 0,10,15 and 20.Simulations suggest that the distributed model is able to successfully reveal the macroscopic trends and local distributions.For the modeled BED,the mean absolute bias error is 0.6-2.4 d.Cross-validation and case-year tests show mean absolute bias errors of 1.3-2.8 d and 0.7-2.5 d,respectively.Comparison shows that the simulation results are consistent with the field investigations.This implies that the simulations are as good as observations,thus providing a viable technique for simulating mountainous heat resources using conventional meteorological data.     

我国客运专线牵引供电系统研究

文章主要对客运专线牵引供电国内外方式和变压器接线形式进行了分析,提出了我国客运专线牵引供电系统的供电方式和变压器接线形式可能采用的方式,为我国客运专线的设计提供一点参考性建议.     

PI—B型感光材料分辨率测定仪

阐述了一种新型感光材料分辨率测定仪的原理，重点讨论了仪器参数的选择和控制显示系统的原理和组成，并给出了装调结果，该仪器光学分辨率高，检测速度快，自动化程度高，新型的液晶汉字显示使各种操作完全并幕菜单选择完成。