交大學刊;;Science Bulletin National Chiao-Tung University

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Investigation of He-Ne Lasers
(交大學刊編輯委員會, 1966-04)
溫鼎勳
;
王興宗
;
T.S.Wen
;
S.C.Wang
To facilitate laser research at Chiao Tung, a laser plasma tube fabrication process using simple equipment has been developed. Consequently, tubes containing mixtures of He and Ne gases were made of different diameters and lengths, and their operation properties investigated. In this paper, the fabrication process is described and some characteristics of He-Ne gas lasers pertaining to the relations between output power and reflectig mirrors,exciting current,etc.,are presented.
蒙特卡羅法之應用
(交大學刊編輯委員會, 1966-04)
陳雲宗
;
顏守謙
;
葛必昭
本文敘述交通部電波研究所用於計算臺北上空電離層實高之方法，判讀數據之方法，以及試算結果。理論上假設電子密度之高度變化為單調增加，並考慮地球磁場之影響，將虛高之積分式變換為便於數值計算之矩陣形式，並導出係數方陣因素，實高，最大電子密度，層厚等之計算公式。實際方面，由虛高對頻率之觀測數據，判讀整理實高計算用數據，利用電子計算機計算實高及其他有關特性。計算結果與美國國家標準局所計算者一致。
On a General Optimization Principle for Discrete Systems
(交大學刊編輯委員會, 1966-04)
曾逢益
;
鄭鈞
;
Fung-I Tseng
;
David K. Cheng
A general theorem about a function of a matrix vector is presented and proved. It is shown that this theorem forms the basis of a general optimization principle for certain performance index in a discrete system. With this principle, it is possible to determine both the optimum(maximum or minimum) value of the performance index and the parameters of the syatem in order to achieve the optimum condition. An example is given which illustrates the optimization procedure as well as demonstrates the versatility of the principle.
The Study of Reflex Klystron
(交大學刊編輯委員會, 1966-04)
郭双發
;
S.F.Guo
In the fabrication of the modern silicon semiconductor device, such as the passivated planar transistor or the monolithic intergrated circuit, the p-n junction is formed by impurity diffusion through a finite diffusion mask opening. The diffusion mask is a layer of silicon dioxide thermally grown by steam oxidation technique. The diffusion opening may be a rectangular stripe or circular dot precisely revealed by photolithographic technique. The impurity atom distribution can not be approximated by an elementary one-dimensional diffusion process. Instead, this distribution must be determined from a detailed solution of a boundary value problem for the structure under consideration. The purpose of this paper is to present a full three-dimensional soution of diffusion problem by integral transform method. The solution is based upon an instantaneous source diffusion process. Two different diffusion openings are considered in the analysis. The rectangular coordinates and the multiple Fourier transform are used for the rectangular geometry. The cylindrical coordinates and the multiple Fourier-Bessel transform are used for the circular geometry.
Occurrence of Es over Taipei
(交大學刊編輯委員會, 1966-04)
黃胤年
;
Yinn-Nien Huang
Using the foEs data in the period March 1960-August 1964, the diurnal, seasonal, and solar cycle variations of the percent occurrence of foEs greater than 5 Mc/s over Taipei were studied. The results were about the same as those of the other Asian stations ever reported. The correlations between P and R as well as between P and Ap were also studied. The results show slight negative correlations. No significant correlation was found between the daily geomagnetic activity and daily occurrence of Es. Comparing the present results with those obtained for another epoch of the solar cycle, it seems to conclude that the correlation of P on R and that of daily geomagnetic activity on daily occurrence of Es are different epoch of the solar cycle.
Analysis of H-type Waveguide
(交大學刊編輯委員會, 1966-04)
劉浩春
;
Hao-Chun Liu
This report presents a theoretical investigation and the experimental results of a special kind of waveguide, H-guide. Physically, the guide consists of a dielectric strip sandwiched between two parallel metal plates. Electrically it is excited in a mode having no longitudinal current flowing in the metal and most energy is located in the dielectric. The fields in the air decay exponentially as the distance from the dielectric surface increases. The basic formulas which describe the behavior of H-guide are derived. Expressions which are used for the determination of the cut-off frequency, rate of field decay in the air and attenuation due to
臺北上空電離層實高及有關特性之計算
(交大學刊編輯委員會, 1966-04)
黃鐘洺
;
李宏洋
The Applications of Monte Carlo Method
(交大學刊編輯委員會, 1966-04)
本文之目的在於介紹蒙特卡羅法之原理及其在計算機方面之應用。先以求π及求定積分為例，說明蒙特卡羅法模擬問題之原理，步驟及其性質，次以解或然率問題而示其優點。最後對長龍問題做有系統之研究，文中各例題均寫成計算機程序計劃並用交大計算機中心之IBM1620電子計算機加以計算。
Analysis and Design of Control Systems for Aircraft and Missiles
(交大學刊編輯委員會, 1966-04)
韓光渭
;
K. W. Han
In this paper, control systems for aircraft and missiles are analyzed and designed using a "stability curve" method which is particularily suitable for testing stability and adjusting parameters for complex control systems. Design procedures are given along with examples.
On the Synthesis of a Special Class of the Communication Network
(交大學刊編輯委員會, 1966-10)
汪中磊
;
C.L.Wang
The highway system is a special kind of communication network. In this paper three problems related to the mathematical model of the highway system is discussed and solved.
Analysis of Sampled-Data Systems in the W-plane
(交大學刊編輯委員會, 1966-10)
韓光渭
;
孫志凱
;
K.W.Han
;
C.K.Sun
A computer program for doing bilinear transformation is presented, and the relations between z-plane and w-plane are investigated. Various methods for analyzing sampled-data control systems in the w-plane are considered.
Analysis of Nonlinear Sampled-Data System Using Z-Transform Method
(交大學刊編輯委員會, 1966-10)
陳英亮
;
韓光渭
;
Y.L.Chen
;
K.W.Han
A method of testing stability of sampled-data systems with a relay-type nonlinearity is presented. In the z-domain, a linear sampled-data system which is equivalent to a nonlinear system under steady state condition can be found, and the existence as well as the stability characteristics of the limit cycle can be defined.
Susceptance of Circular Apertures in Wave Guides
(交大學刊編輯委員會, 1966-10)
張丹
;
Tan Chang
A brief description of the general principles and methods of finding the aperture susceptance of circular apertures in the transverse plane of wave guide is presented. The standing wave method and equivalent magnetic wall method apply only to smaller apertures. For large apertures the variational method is used to extend it to the case of circular wave guide. The results obtained from these methods are found to be compatible.
蒙特卡羅法之應用（續）（二）數學問題之計算
(交大學刊編輯委員會, 1966-10)
顏守謙
;
葛必昭
本文之目的在於介紹蒙特卡羅法在數學方面之應用。先求重積分，以示蒙特卡羅法之優點，再研究反矩陣及偏微分方程式，以示各種數學問題均可以蒙特卡羅法求其解答。文中各例題均寫成計算機程序計劃，並用交大計算機IBM-1620電子計算機加以計算。
Radiation,Temperature and Gain in n-p-n Planar Transistor
(交大學刊編輯委員會, 1966-10)
張俊彥
;
郭双發
;
C.Y.Chang
;
S.F.Guo
The dependence of current amplification factor on emitter current, temperature, resistivities, surface treatments as well as on the radiation effects are investigated. The experiments show that the current amplification factor is more dependent on recombination and scattering mechanism than the other effects. Temperature effect is profound also, high temperature causes high gain(400% at 200℃), low temperature causes very low gain (5% at liquid oxygen). Both the neutron and the Υ-ray irradiation cause the Frenkel defect in the crystal and thus also decrease the current gain preatly. Recovery of gain is obtained by heating at 300℃, 150℃ etc. in dry nitrogen atmosphere and then followed by quick annealing.
Operational Solution of Inhomogeneous Wave Equation
(交大學刊編輯委員會, 1966-10)
陳俊雄
;
C.H.Chen
The Laplace transformation, the three-dimensional Fourier transformation, and the convolution theorem are used to solve the inhomogeneous scalar wave equation in unbounded space. The solutions obtained consist of retarded potential and a function which is expressed as a superposition of the plane wave solutions. The retarded potential solution contains a unit step function which makes the physical explanation of the result more obvious. Some comments on the four-dimensional Fourier transformation method of approach are also included.
The Metal-Oxide-Semiconductor(MOS)Field-Effect Transistors
(交大學刊編輯委員會, 1966-10)
陳龍英
;
L.I.Chen
The operation theory of MOS field-effect transistors based on some simplifying assumptions are analyzed. Then a simple method is presented to determine the effective surface carrier mobility, the parasitic resistance in the source region, and the transconductance in the saturation region. Some curves which are necessary in the method are plotted. The saturation drain current and gate voltage of these curves are normalized to the zero bias saturation drain current and pinch-off voltage respectively, thus this method is valid for different kinds of MOS transistors. The curves show that the parasitic resistance may be neglected for most of the practical MOS transistors.
Group Velocity and Energy Velocity In Lossless,Isotropic and Homogeneous Dielectric Slab Guide
(交大學刊編輯委員會, 1967-04)
李修仁
;
Hsiu Jen Lee
When a uniform E.M. Plane wave travels in a dense perfect dieletric incident on the boundary of a less dense perfect dielectric, total reflection will occur, if the incident angle is greater than the critical angle. If both dielectrics are lossless, isotropic, and homogeneous, then the reflected plane wave in the denser medium will still be uniform and the transmitted wave in the less dense material will be nonuniform. Let us consider a slab guide immersed in air. The geometry of the slab is assumed to be infinitely wide, but with finite thickness. The dielectric in the slab is lossless, isotropic, and homogeneous where its permittivity is larger than that in air and its permeability is not less than that in air. Thus the uniform plane waves propagating in the slab possess the property of total reflection as stated in the preceeding paragraph. The investigations of dielectric slab guide have been largely based on the graphical method while in this paper, the analytic method is adopted. The field distribution is describedfirst, and then the phase, group and energy velocity are derived, finally the relationship among them is established.
High Frequency Amplifier Design Using h-Parameters
(交大學刊編輯委員會, 1967-04)
張德驊
;
Teh Hua Chang
Frequency Control By Passive Microwave Atomic Resonance
(交大學刊編輯委員會, 1967-04)
陳德勝
;
T.S.Chen
This article is a study of the Cesium beam resonant response and gives a servo analysis of its application to precision frequency control system.