N型GaP单晶范德堡测试法的最佳条件

介绍了测试Ｓｉ、Ｇｅ、ＧａＡＳ等单晶材料性能参数的一种方法—Ｖａｎｄｅｐａｕｗ法，通过实验和分析，得到了测试过程中电极的制作和测试的最佳条件．     

The international electrical units: a failure in standardisation?

The ‘international’ electrical units, initially defined by the International Electrical Congress of Chicago in 1893, represented a major step forward in international electrical standardisation. Yet they were flawed both theoretically and technically, were adopted inconsistently in different countries and were soon subject to criticism and revision. This paper addresses the extent to which the international units—notwithstanding their flaws—were in fact adequate for the needs of engineering, commerce and science at the time, and concludes that the practical position was actually very satisfactory. It also addresses how the international electrical units came in to being, in the context of alternative philosophies of the nature of the standardisation process—that it can be essentially central or local. The central influence on the international units was the series of international electrical congresses of the late nineteenth century, which I conclude were a highly unsatisfactory mechanism, responsible for many of the weaknesses in the resulting standards. In contrast, I argue that it was local influences, the networks of scientists and standards laboratories that defined and maintained the standards, which gave them their strength.     

欧姆定律微分形式微小误差研究

以稳恒载流园直导线为例,根据保证稳恒电流的电荷分布特点,指出欧姆安律微小形式中的电场强度E^→应是总电场的电流方向的分量,同时又指出一般情况下这一分量与总电场方向偏差很小,量值基本相等。     

传输线第三类格林函数的一种解法

提出一种求解传输线第三类格林函数的方法。首先，用欧姆－瑞利法求出辐射条件下传输线的格林函数；继之，根据参数不同的两对传输线连结处的边界条件，求出波的反射与透入系数；最后，用散射叠加法求得传输线的第三类格林函数。     

欧姆定律的使用条件

从欧姆定律的微分形式出发,讨论了欧姆定律的应用条件,阐述了欧姆定律在金属、液体和气体中的应用条件.     

金属导体直流电能的输运过程研究

提出了不同于传统电动力学的直流电能流输运过程解释,指出坡印廷能流的定义不能简单推广到直流电.通过对含欧姆定律的麦克斯韦方程组进行分析,证明了直流电的能流输运过程受扩散方程支配,与波动方程无关;发现经典坡印廷能流的推导过程存在隐含的物理学限制,导致其不适用于金属导体内电磁纵场的做功过程.研究表明,金属导体直流电能的输运过程及其支配方程均与洛伦茨力有关,与坡印廷矢量无关.研究结论可以推广至低频似稳态,从而为电工学和近场电磁学的研究带来广阔的前景.     

对欧姆定律微分形式微小误差的研究

以稳恒载流圆直导线为例，根据保证稳恒电流的电荷分布特点，指出欧姆定律微分形式中的电场强度Ｅ应是总电场在电流方向的分量。同时又指出一般情况下这一分量与总电场方向偏差很小，量值基本相等。     

From successful measurement to the birth of a law: Disentangling coordination in Ohm's scientific practice

In this paper, I argue for a distinction between two scales of coordination in scientific inquiry, through which I reassess Georg Simon Ohm's work on conductivity and resistance. Firstly, I propose to distinguish between measurement coordination, which refers to the specific problem of how to justify the attribution of values to a quantity by using a certain measurement procedure, and general coordination, which refers to the broader issue of justifying the representation of an empirical regularity by means of abstract mathematical tools. Secondly, I argue that the development of Ohm's measurement practice between the first and the second experimental phase of his work involved the change of the measurement coordination on which he relied to express his empirical results. By showing how Ohm relied on different calibration assumptions and practices across the two phases, I demonstrate that the concurrent change of both Ohm's experimental apparatus and the variable that Ohm measured should be viewed based on the different form of measurement coordination. Finally, I argue that Ohm's assumption that tension is equally distributed in the circuit is best understood as part of the general coordination between Ohm's law and the empirical regularity that it expresses, rather than measurement coordination.