共查询到20条相似文献，搜索用时 343 毫秒
1.
Ghulam Qasim Mehboob ur Rehman A. Kareem . School of Communication Information Engineering Shanghai University Shanghai China . Gomal University D.I.Kham Pakistan 《上海大学学报(英文版)》2000,4(1):27-30
1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ａｎｕｍｂｅｒｏｆｆｕｌｌｗａｖｅａｎａｌｙｓｅｓｈａｖｅｂｅｅｎｐｒｏｐｏｓｅｄｉｎｔｈｅｐａｓｔｔｗｏｄｅｃａｄｅｓ[1～3].Ｔｈｅｓｅａｌｌｐｒｅｄｉｃｔｔｈｅｃｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆｍｉｃｒｏｓｔｒｉｐａｎｔｅｎｎａｓｒｉｇｏｒｏｕｓｌｙａｔｈｉｇｈｅｒｆｒｅｑｕｅｎｃｉｅｓ.Ｔｈｅｓｐｅｃｔｒａｌｄｏｍａｉｎｍｅｔｈｏｄｏｆｍｏｍｅｎｔｓ[3],ｕｓｉｎｇｓｉｍｐｌｅｂａｓｉｓｆｕｎｃｔｉｏｎｓｒｅｑｕｉｒｅｓａｌａｒｇｅｓｉｚｅｍａｔｒｉｘｓｕｃｈａｓ(… 相似文献
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1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｔｈｅｄｅｓｔｒｕｃｔｉｏｎｏｆｒｏｃｋｗａｓａｌｗａｙｓｒｅｌｅｖａｎｔｔｏｔｈｅｔｉｍｅｆａｃｔｏｒ,ｗｈｉｃｈｗａｓｔｙｐｉｃａｌｌｙｍａｎｉｆｅｓｔｅｄａｓｔｈｅｔｉｍｅｄｅｐｅｎｄｅｎｔｇｒａｄｕａｌｂｒｅａｋｉｎｇｐｒｏｃｅｓｓ.Ｔｈｅｄｏｍｉｎａｎｔｆａｃｔｏｒｄｕｒｉｎｇｔｈｅｄｅｓｔｒｕｃｔｉｖｅｐｒｏｃｅｓｓｗａｓｅｘｔｅｎｓｉｏｎｏｆｍａｃｒｏｃｒａｃｋｓ,ｗｈｉｃｈｈａｄｂｅｅｎｔｅｓｔｅｄｏｕｔｂｙｓｉｔｅｓｕｒｖｅｙｉｎＴｈｒｅｅＧｏｒｇｅｓ… 相似文献
3.
李树 《教学月刊(小学版)》2002,(11)
Ｔｈｅｍｅ：ＴｈｅＢｏｄｙＰａｒｔｓＦｕｎｃｔｉｏｎ：ＩｎｔｒｏｄｕｃｉｎｇｔｈｅｂｏｄｙｐａｒｔｓＳｔｒｕｃｔｕｒｅ：ＴｈｅＩｍｐｅｒａｔｉｖｅＳｅｎｔｅｎｃｅ(ｖｅｒｂ +ｔｈｅｏｂｊｅｃｔ)Ｖｏｃａｂｕｌａｒｙ：ｆｉｎｇｅｒ／ｌｅｇ／ｂｏｄｙ／ａｒｍ／ｆｏｏｔ／ｈａｎｄＴｅａｃｈｉｎｇａｉｄｓ：ｍｕｌｔｉｍｅｄｉａ／ｓｏｍｅｗｏｒｄｃａｒｄｓｗｉｔｈｔｈｅｓｉｘｎｅｗｗｏｒｄｓＳｔｅｐＩ：Ｗａｒｍ -ｕｐ１．ＦｒｅｅＴａｌｋ：Ｇｅｔｔｏｋｎｏｗｅａｃｈｏｔｈｅｒ．Ｔ：Ｈｅｌｌｏ，Ｋｉｄｓ．Ｎｉｃ… 相似文献
4.
DING You dong School of Computer Engineering Science Shanghai University Shanghai China 《上海大学学报(英文版)》2001,(1)
1 Ｉｎｔｒｏｄｕｃｔｉｏｎ ＴｈｅｓｔｕｄｙｏｆＢ啨ｚｉｅｒｓｕｒｆａｃｅｓ’ｃｏｎｖｅｘｉｔｙｉｓｕｓｅｆｕｌｉｎＣＡＧＤ (ｃｏｍｐｕｔｅｒａｉｄｅｄｇｅｏｍｅｔｒｉｃｄｅｓｉｇｎ)ａｎｄｔｈｅｒｅｈａｖｅｂｅｅｎｍａｎｙｄｉｓｃｕｓｓｉｏｎｓａｎｄｒｅｓｕｌｔｓｆｏｒｔｈｅｃｏｎ ｖｅｘｉｔｙｏｆｔｈｅＢ啨ｚｉｅｒｓｕｒｆａｃｅｏｖｅｒａｔｒｉａｎｇｌｅ[1～ 6] .ＢｕｔｆｏｒｔｈｅｃｏｎｖｅｘｉｔｙｏｆｔｈｅＢ啨ｚｉｅｒｓｕｒｆａｃｅｏｖｅｒａｒｅｃｔａｎ ｇｌｅ ,ｗｈａｔｗｅｋｎｅｗｉｓｌｉ… 相似文献
5.
EFFECT OF CORROSION ON BOND BEHAVIOR AND BENDING STRENGTH OF REINFORCED CONCRETE BEAMS 总被引：1，自引：0，他引：1
ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｒｅｉｓｇｒｏｗｉｎｇｃｏｎｃｅｒｎｆｏｒｃｏｒｒｏｓｉｏｎｄａｍ ａｇｅｉｎｒｅｉｎｆｏｒｃｅｄｃｏｎｃｒｅｔｅ (ＲＣ)ｓｔｒｕｃｔｕｒｅｓｗｉｔｈｓｅｖｅｒａｌｄｅｃａｄｅｓ’ｓｅｒｖｉｃｅ.Ｔｈｅｒｅｉｎｆｏｒｃｅｍｅｎｔｃｏｒ ｒｏｓｉｏｎｏｆＲＣｃｏｎｓｔｒｕｃｔｉｏｎｓｐｒｏｂａｂｌｙｉｓｔｈｅｍｏｓｔｓｉｇｎｉｆｉｃａｎｔｐｒｏｂｌｅｍａｎｄｏｕｔｗｅｉｇｈｓｏｔｈｅｒｆｏｒｍｓｏｆｄｅｔｅｒｉｏｒａｔｉｏｎ .ＳｔｕｄｉｅｓｂｙＰｅａｔｔｉｅｅｔａｌ.( 1 9… 相似文献
6.
1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｔｈｅｓｕｒｆａｃｅｔｅｘｔｕｒｅｓｔｅｅｌｓｈｅｅｔｓｈａｖｅｂｅｅｎｅｘｔｅｎｓｉｖｅｌｙｕｓｅｄｉｎａｕｔｏｍｏｂｉｌｅｉｎｄｕｓｔｒｙｆｏｒｔｈｅｉｒｇｏｏｄｆｏｒｍａｂｉｌｉｔｙａｎｄｐａｉｎｔｉｎｇｐｅｒｆｏｒｍａｎｃｅ.Ａｓｋｎｏｗｎ,ｔｈｅｒｅｅｘｉｓｔｅｓｆｒｉｃｔｉｏｎｂｅｔｗｅｅｎｔｈｅｓｈｅｅｔａｎｄｍｏｄｅｌｄｕｒｉｎｇｓｔａｍｐｉｎｇ.Ｗｈｅｎｔｈｅｓｈｅｅｔｉｓｄｅｆｏｒｍｅｄｉｎｔｏａｗｏｒｋｐｉｅｃｅ,ｔｈｅｐｒｏｃｅｓｓｏｆｓｈｅｅｔ… 相似文献
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１ Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｔｈｅｓｍａｌｌｓｉｚｅ（ｄｉａｍｅｔｅｒ＜１００ｎｍ）ｏｆｕｌｔｒａｆｉｎｅｐａｒｔｉｃｌｅｓｅｎｄｏｗｓｔｈｅｍｗｉｔｈｕｎｕｓｕａｌｓｔｒｕｃｔｕｒｅ,ｅｌｅｃｔｒｏｎｉｃ,ｏｐｔｉｃａｌ,ｍａｇｎｅｔｉｃａｎｄｃｈｅｍｉｃａｌｐｒｏｐｅｒｔｉｅｓ,ｌｅａｄｉｎｇｔｏｍａｎｙｉｍｐｏｒｔａｎｔａｐｐｌｉｃａｔｉｏｎｓｓｕｃｈａｓｃａｔａｌｙｓｔｓ,ｅｌｅｃｔｒｏｏｐｔｉｃａｌｄｅｖｉｃｅｓａｎｄｆｉｎｅｃｅｒａｍｉｃｓ［１］．Ａｓｏｎｅｏｆｓｐｅｃｉａｌｆ… 相似文献
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9.
Ye Zhiming 《上海大学学报(英文版)》1999,(1)
１ Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｔｈｅｓｏｌｕｔｉｏｎｓｏｆｔｅｍｐｅｒａｔｕｒｅａｎｄｄｉｓｐｌａｃｅｍｅｎｔｆｉｅｌｄｓｏｆｄａｍｓａｒｅｏｆｉｎｔｅｒｅｓｔｔｏｍａｎｙｒｅｓｅａｒｃｈｅｒｓｉｎｈｙｄｒｏｐｏｗｅｒｉｎｄｕｓｔｒｙａｎｄｏｔｈｅｒｓｆｏｒｙｅａｒｓ,ｂｅｃａｕｓｅｏｆｔｈｅｉｒｉｍｐｏｒｔａｎｃｅｉｎｔｈｅｓａｆｅｔｙｏｆｄａｍｓ．Ｇｅｎｅｒａｌｌｙｓｐｅａｋｉｎｇ,ｎｕｍｅｒｉｃａｌｓｏｌｕｔｉｏｎｓｗｅｒｅｄｅｖｅｌｏｐｅｄｔｏｕｎｄｅｒｓｔａｎｄｔｈｅｄｉｓｐｌａｃｅ… 相似文献
10.
1 Ｉｎｔｒｏｃｕｄｉｏｎ Ｔｈｅｆｉｎｉｔｅ ｄｉｆｆｅｒｅｎｃｅｔｉｍｅ ｄｏｍａｉｎ (ＦＤＴＤ)ｍｅｔｈｏｄｈａｓｂｅｅｎｅｘｔｅｎｓｉｖｅｌｙｕｓｅｄｔｏｓｉｍｕｌａｔｅｔｉｍｅｄｏｍａｉｎｅｌｅｃ ｔｒｏｍａｇｎｅｔｉｃｆｉｅｌｄｓｗｉｔｈｉｎｖａｒｉｏｕｓ ｇｕｉｄｅｄｗａｖｅｓｔｒｕｃ ｔｕｒｅｓ,ａｎｄｉｎｔｈｅｏｐｅｎａｉｒ[1 ,2 ].Ｔｈｅｉｎｆｏｒｍａｔｉｏｎｆｏｒｔｈｅｂｒｏａｄｂａｎｄｆｒｅｑｕｅｎｃｙｃａｎｂｅｐｒｏｖｉｄｅｄｉｎａｓｉｎｇｌｅｓｉｍｕｌａ ｔｉｏｎ .Ｔｈｅｓｔａ… 相似文献
11.
针对基于模拟电荷法的数值保角变换计算法在复杂边界求解模拟电荷点电荷量时不精确及不稳定问题,提出一种基于（k,j）-Padé 迭代法改进的SSOR方法并用于求解电荷点电荷量。首先通过模拟电荷法将数值保角变换的逼近问题转换为理论上较为成熟的共轭调和函数逼近问题;然后根据边界条件、正则化条件、约束条件和柯西条件构造出约束方程组,使用改进算法计算电荷点电荷量;最后利用电荷点电荷量计算出数值保角变换函数。实验结果表明, 该方法能很好地保持映射前后角度之间的关系。与原方法相比,在橙形区域中最大精度提升率约为11.2%, 在椭圆区域中最大精度提升率为5.4%,且比原方法稳定性高。 相似文献
12.
GIS-Based Simulation of Engineering Construction Schedule 总被引：1，自引：0，他引：1
For its complexity, engineering construction schedule design is limited by various factors. Simulation-based engineering construction schedule takes critical path method （ CPM ） network as frame and calls complex cyclic operation network （CYCLONE） simulation model enclosed in advance for its simulation nodes. CYCLONE simulation model takes charge of simulating stochastic duration of activity and efficiency of resources, while CPM model performs project scheduling. This combination avoids the shortcomings of both models. Furthermore. geographic information system （ GIS ） technique is utilized to visualize the construction processes which are otherwise difficult to be understood by static results described. Application in practical project verifies the feasibility and advantage of the technique. 相似文献
13.
镜像法和分离变量法是电动力学教学中的重要内容之一．学生通过学习,掌握镜像法和分离变量法对后续课程的学习有很大的帮助．文章用镜像法和分离变量法给出了位于介质锥公共顶点处电荷场的势。 相似文献
14.
Battery models are of great importance to develop portable computing systems, for whether the design of low power hardware architecture or the design of battery-aware scheduling policies. In this paper, we present a physically justified iterative computing method to illustrate the discharge, recovery and charge process of Li/Li-ion batteries. The discharge and recovery processes correspond well to an existing accurate analytical battery model： R-V-W＇s analytical model, and thus interpret this model algorithmically. Our method can also extend R-V-W＇s model easily to accommodate the charge process, The work will help the system designers to grasp the characteristics of R-V-W＇s battery model and also, enable to predict the battery behavior in the charge process in a uniform way as the discharge process and the recovery process. Experiments are performed to show the accuracy of the extended model by comparing the predicted charge times with those derived from the DUALFOIL simulations. Various profiles with different combinations of battery modes were tested, The experimental results show that the extended battery model preserves high accuracy in predicting the charge behavior. 相似文献
15.
电像法的实质是用假想的不存在的点电荷去代替未知的边界面(或介质交界面)上的真实电荷(如感生电荷或极化电荷).由唯一性定理知,代替的条件是不改变所求问题中的方程、边值关系和边界条件,并且由这些条件得出假设电荷(电像)的个数、电量及位置. 相似文献
16.
In order to achieve a modulator with broad bandwidth and perfect impedance match,a novel electro-optical modulator based on GeO2-doped silica waveguides on silicon substrate is designed.The finite element model of the whole electro-optical modulator is established by means of ANSYS.With the finite element method analysis,the performance of the novel modulator is predicted.The simulation reveals that the designed modulator operates with a product of 3 dB optical bandwidth and modulating length of 226.59 GHz-cm,and a characteristic impedance of 51.6 Ω at 1 550 nm wavelength.Moreover,the calculated electrical reflected power of coplanar waveguide electrode is below -20 dB in the frequency ranging from 45 MHz to 65 GHz.Therefore,the designed modulator has wide modulation bandwidth and perfect impedance match. 相似文献
17.
运用解析法推证了物理学中静电场电势零点选取的通用原则,提出并证明了场源电荷分布在无限空间时也可以选无限远为电势零点的条件。 相似文献
18.
圆弧形曲梁的传递函数方法 总被引：1，自引：0，他引：1
应用传递函数方法求解圆弧曲梁,将复杂的曲梁分成若干一维子系统,轴力作为子系统的参数,通过引入状态变量,将曲梁的控制方程及边界条件改写成状态空间形式,再借鉴有限元的拼接方法,得到梁的变形解.文中的数值算例显示了此方法的可行性. 相似文献
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20.
Ionizationconstantsofpolyproticweakacidsarebasicthermodynamicsdata .Undermanycircumstances ,measurementsofionizationconstantsofpolyproticweakacidsareroutinelynecessary ,e .g .,fornewcompounds ,forwell establishedcompoundsatagiventemperaturewherepreviousdataareunavailable,andindifferentsol ventsystems.ThemainmethodsfordeterminationofionizationconstantsreportedinRefs.[1]— [4 ]arecon ductometricmethod ,potentiometrictitrationmethod ,NMRmethodandspectrophotometricmethod .Inthispaper,anewmethodf… 相似文献