Browsing by Issue Date, starting with "1971-04"

Now showing 1 - 20 of 95540

Statistical Mechanics of "2*2*2" Ising Model
(交大學刊編輯委員會, 1971-04)
王家玉
;
張坤樹
;
Wang Chia-Yu
;
Kun Shu Chang
The partition function of 2*2*2 Ising lattice with external magnetic field was calculated by elementary enumeration of of complexions. The zeros of the partition function in the complex temperature and in the complex magnetic field plane were obtained. The internal energy , specific heat, magnetic susceptibility in the absence of magnetic field, and the magnetization with external magnetic field were also calculated. The estimated critical temperatures from the zeros near the positive real axis and from the maximum of specific heat curve are compared with that obtained from the Pade' approximation for the infinite lattice system. It is shown that the zeros of partition function of ferromagnet lie on the unit circle, and those of antiferromagnet distribute on the negative real axis in the complex fugacity plane.
Charge Transport and Storage Effect of Gold Ion Implanted Silicon Dioxide MOS Structure
(交大學刊編輯委員會, 1971-04)
陳龍英
;
施敏
;
L.I.Chen
;
S.M.Sze
When gold ions of sufficiently high dose (~10^14 ions/cm^2) are implanted into thermally grown silicon dioxide MOS structure, novel charge transport and memory effect have been observed. For a typical structure with 800Å SiO2 and a projected ion range of 400Å, most of the induced interface states can be annealed out at 400℃. The charge transport in the implanted oxide is found to follow the Frenkel-Poole emission process with trapping energy level at 1.21 eV from the conduction band. Since the charge transport in the inner part of the oxide is by the Fowler-Nordheim tunneling mechanism, the MOS structure is equivalent to a double -layer memory device in which charges can be stored at the trapping centers inside the oxide when voltages are applied . Effects of oxide thickness, ion dose level, annealing temperature, and measurment temperature have been studied. Good agreements have been obtained between experimental results and theoretical predictions.
Microwave Avalanche Diodes__Invited Paper
(交大學刊編輯委員會, 1971-04)
施敏
;
S.M.Sze
;
R.M. Ryder
Microwave avalanche diodes of various types (Impatt, Trapatt, etc.)can generate power sufficient for microwave receivers and some transmitters. This brief review summarizes mechanisms of operation, power output, efficiency, noise,and some important features of design and fabrication .
Informatics and Modern Society__Invited Paper
(交大學刊編輯委員會, 1971-04)
竇祖烈
;
Julius T.Tou
On the basis of Parametric Amplification
(交大學刊編輯委員會, 1971-04)
許祿寶
;
陸永平
;
Lu-Pao Hsu
;
Yung-Ping Loh
A quantitative analysis parametic amplification vas usually made from the viewpoint of voltage or power . This paper adopted electric charge as the quantity to be analyzed , since it reveals the physical insight of parametric amplification fully. The charge generation mechanism and the charge oscillation criteria have been established and discussed in depth. The simple case of pulsive pumping has been considered thoroughly, and the obtained results may be applied to wave propagation in time-variant media and to light refiection in periodic optical resonators. The approach developed here can be extended to more general cases such as linear pumping and sinusoidal pumping.
A New FORTRAN Processing Program-FORTRAN Processor(19000)-for the IBM-1620 Computer
(交大學刊編輯委員會, 1971-04)
蔡中川
;
Jong-Chuang Tsay
The existing FORTRAN processor of IBM 1620 digital computer at National Chiao Tung University uses a two-stage translation process to execute a FORTRAN program. Considerable time and paper tape are wasted in this process. This paper describes an one-stage translation process that avoids these disadvantages. This new translation program called FORTRAN processor (19000) is now used in the computer center of National Chiao Tung University.
A Study on the Range and Accuracy of Long-Rang Ballistic Missiles
(交大學刊編輯委員會, 1971-04)
陳煦
;
Hsu Chen
The flight of a ballistic missile is idealized by the assumptions that the speed is acquired impulsively at sea level and that drag is absent. With practical long-range rockets the distance traversed under power is usually 5-10% of the total range, and the length of re-entry path in which drag is significant is even smaller. Consequently the impulsive assumption gives a good first approximation both for the range and for the impact errors of long-range rockets.
An Extension of the Dieudonne's Mean Value Theorem
(交大學刊編輯委員會, 1971-04)
鄭希灝
;
Shi-Haw Cheng
In this paper we extend the Dieudonne's mean value theorem to the f(x) which is a mapping of 〔a,b〕into a topological linear space and the Ø(x) which is a continuous realvalued function on 〔a,b〕. One of the sufficient conditions is the existence of the right derivative of f. Particulary, if f(x) is a mapping of 〔a,b〕into〔c,d〕, the sufficient condition can be relaxed to the existence of the Dini derivative.
Temperature Dependence of Ionization Rates in Ge
(交大學刊編輯委員會, 1971-04)
戴寶通
;
張俊彥
;
B.T.Dai
;
C.Y.Chang
The ionization rates of eletron and hole in germanium have been measured from 200°K to 300°K and were fit to the modified Baraff theory, in which the optical phononmean free path is temperature dependent and can be fit to the formula:λ=λ0 tanhEp/2KT, where Ep is the average optical phonon energy. The asymptotic optical phonon mean free paths wherin deduced from experiments are λ=73±4Å and λoh=84±4Å for electron and hole respectively which are in good agreement with that of Miller's data obtained at room temperature. A simplified approach to calculate the ionization rates from the photomultiplication data has also been deduced for the one sided abrupt junction.
On a Grillage Supported at Four Corners
(交大學刊編輯委員會, 1971-04)
馬爾傑
;
Er-Chieh Ma
A matrix analysis of a grillage simply supported at four corners under joint loadings is presented with a new approach. The beams of the grillage may be of variable stiffness with unequal spacing, and their intersections need not be orthogonal. However, the stiffness of all transverse or longitudinal beams must be the same. The joints of the grillage are assumed to transmit only compression and tension. The matrix equation of the grillage leads to the form AX+XB=E, in which matrices A and B may be singular, and the unknown matrix X is rectangular. A method of solution is developed and illustrated by a numerical example.
An Application of Vector Space to Sampling Theorem
(交大學刊編輯委員會, 1971-04)
林坤洲
;
K.C.Lin
There are some important concepts in communication theory which are purely of a vector space nature. One of them is the sampling theorem, which says that in a certain class of signals a particular signal is completely determined by its values(samples) at an equally spaced set of times extending forever.
Temperature Dependence of Breakdown Voltage in Silicon Abrupt p-n Junctions
(交大學刊編輯委員會, 1971-04)
張俊彥
;
邱勝雄
;
許祿寶
;
C.Y.Chang
;
S.S.Chiu
Temperature dependence of breakdowm voltage in silicon abrupt p+n junction has been calculated using a modified Baraff theory and measured experimentally from 77°K to 500°K, and with the substrate doping from 10^15 cm^-3 to 10^18 cm^-3. Experimental data are in good agreement with the results of the theoretical calculations. These results strongly substantiate the validity of the modified Baraff theory which has been pointed out by Sze and Cowwell.
管管朱陵
(1971-05-01)
管管
為管管畫像
(1971-11-01)
朱星鶴
龍穴
(1972)
楊英風
此作係一九七二年創作，一九八四年以水泥放大置於彰化吳聰其先生住宅大門前。一九八三年開始楊英風為彰化吳宅作庭院及景觀設計，〔龍穴〕即是其中之一。據楊英風自述創作理念：「大地是充滿生命的有機體，其氣與眾生相通，充滿靈氣之地，可化育人傑，興旺家族，具有豐沛的生命力，如巨龍猛虎的生命脈動，可綿延不絕，代代興盛。此作便以地靈人傑之「龍穴」為創作泉源，以有力呈現深達地底的脈動氣息，傳達眾生與大地不可分割的緊密性。」
管管作品十二首
(1972-01-01)
管管
新加坡連氏大廈〔龍躍〕設置案（1972-1973）
(1972)
不詳
楊英風在星洲所作雕塑作品皆大量運用了怡保地區的白色大理石，〔龍躍〕為其中之一作品，預定設置在連氏大廈正廳。
Second Harmonic Generation in Piezoelectric Semiconductors
(交大學刊編輯委員會, 1972-01)
吳啟宗
;
C.C.Wu
The second harmonic generations in piezoelectric semiconductorts are investigated by assuming a parabolic band structure. The second harmonic generation can be found to be expressed in terms of the fundamental. It is shown that the amplitude of second harmonic generation is proportional to the quadratic of the fundamental and depends upon the sound frequency for parabolic band structure in n-type InSb. Therefore the intensity of the second harmonic generation is proportional to the quadratic of the intensity of the fundamental.
新加坡連氏大廈〔龍躍〕設置案（1972-1973）
(1972)
不詳
楊英風在星洲所作雕塑作品皆大量運用了怡保地區的白色大理石，〔龍躍〕為其中之一作品，預定設置在連氏大廈正廳。
陳故副總統銅像紀念公園景觀雕塑設計模型（1967-1972）
(1972)
不詳
楊英風設計陳故副總統紀念公園不僅包括銅像、紀念碑與浮雕製作，也計畫以公園形式建立一座陳故副總統紀念廣場。圖為紀念館懸樑、頂層樓板及銅像筋樑配置圖。