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大约有 49 项符合 Two+Section+method 相关的结果,搜索耗时1.629秒

Study of ultra-wideband radar signals-generated technology using two-channel signal generator

<正>Synthesis of ultra-wideband (UWB) linear frequency modulation radar signals is a very important technology for microwave imaging, target identification and detection of low radar-cross-section (RCS) targets. A new method of UWB radar signals gene


来源:系统工程与电子技术:英文版      作者:Wan Yonglun,Lu Youxin,Si Qiang     发表于: 2007年4期     

Offset quantum-well method for tunable distributed Bragg reflector lasers and electro-absorption mod

A two-section offset quantum-well structure tunable laser with a tuning range of 7 nm was fabricated using offset quantum-well method. The distributed Bragg reflector (DBR) was realized just by selectively wet etching the multiquantum-well (MQW) layer abo


来源:中国光学快报:英文版      作者:阚强,丁颖,赵玲娟,朱洪亮,周帆,王鲁峰,王宝军,王圩     发表于: 2005年8期     

Equivalent bending stiffness of simply supported preflex beam bridge with variable cross-section

In order to understand mechanical characters and find out a calculating method for preflex beams used in particular bridge engineering projects, two types of simply supported preflex beams with variable cross-section, preflex beam with alterative web dept


来源:哈尔滨工业大学学报:英文版      作者:杨明,黄侨,王德军     发表于: 2010年1期     

Algorithm of Vertical Profiles of Radar Echoes between Any Two Points Based on Webpage and Its Appli

Based on the puzzle data of radar reflectivity in and around Jiangxi Province,the slope profile method and the polar coordinate method were used to display the vertical profiles of radar echoes between any two points.The technical route of extracting rada


来源:气象与环境研究:英文版      作者:Lei LI,Haibo ZOU,Zhiming HE     发表于: 2020年1期     

Measurement of 85Rb(n,2n)84Rb reaction cross-section from 12 MeV up to 19.8 MeV

The cross-section data of the 85Rb(n,2 n)84Rb reaction have been measured with the neutron energies of 12 MeV to 19.8 MeV using the activation technique and the relative method.The 85Rb samples were irradiated on the surface of a two-ring orientation asse


来源:中国物理C:英文版      作者:朱传新,王佳,蒋励,郑普     发表于: 2020年3期     

基于修正的两段法对某电站水库松散堆积体岸坡塌岸预测

水库塌岸是影响水电站库区移民工程的重要地质灾害问题,研究其塌岸模式、预测方法并预测最终塌岸宽度是十分必要的。通过对某水电站库区重点库段塌岸进行调查分析,该水电站库区塌岸模式以冲蚀磨蚀型和坍塌型为主;分析几种常用的塌岸预测方法,确定采用修正后的两段法预测该库区塌岸最终宽度;采用现场工程地质调查法、工程类比法等手段确定了库区塌岸预测参数,并对该水电站库区塌岸进行了预测,预测结果表明库区塌岸总长30.5km,塌岸预测最终宽度为5~50m。该研究可为库区移民工程提供重要依据。


来源:安全与环境工程      作者:贾建红,周传波,侯炳绅,曹伟轩,吴和平     发表于: 2016年5期     

A Correlation Potential Method for Electron Scattering Total Cross Section Calculations on Several D

A complex optical model potential correlated by the concept of bonded atom, which considers the overlapping effect of electron clouds between two atoms in a molecule, is firstly employed to calculate the total cross sections for electron scattering on sev


来源:理论物理通讯:英文版      作者:LIUYu-Fang,SHIDe-Heng,SUNJin-F     发表于: 2005年2期     

A Modified Potential Method for Electrons Scattering Total Cross Section Calculations on Several Mol

<正> A complex optical model potential modified by the concept of bonded atom,which takes into considerationthe overlapping effect of electron clouds between two atoms in a molecule,is employed to calculate the total cross sections(TCSs)for electrons


来源:理论物理通讯:英文版      作者:MA Heng,SHI De-Heng,SUN Jin-Fe     发表于: 2006年4期     

Pull Breech out versus Push Impacted Head up in Emergency Cesarean Section: A Comparative Study

Objective: To compare maternal and fetal outcome associated with two methods Reverse breech extraction versus Head pushing to deliver the impacted fetal head in advanced labor requiring emergency Cesarean section. Method: A prospective comparative study w


来源:妇产科期刊(英文)      作者:Hend S. Saleh,Gamal A. Kassem,     发表于: 2014年6期     

Segregation during crystal growth from melt and absorption cross section determination by optical ab

Segregation during crystal growth from melt under two conditions is studied by using crystal mass,which can be measured easily,as an independent variable,and a method to determine the effective segregation coefficient and absorption cross section of optic


来源:中国科学:物理学、力学、天文学英文版      作者:QingLi Zhang (1), ShaoTang Y     发表于: 2008年5期     

基于DEM的“两段法”水库塌岸预测研究

根据“两段法”进行塌岸预测的基本原理,本文基于Microsoft Visual Studio编程平台和ArcGIS Engine地理信息系统二次开发组件完成“两段法”塌岸预测程序的实现,将“两段法”的应用范围由二维空间拓展到三维空间,实现了塌岸宽度和体积计算的参数化和自动化,通过简单的人机交互,即可完成塌岸预测,提高了塌岸预测效率;塌岸预测前后岸坡形态的三维可视化对比展示,也为库岸防护工程的实施提供了更可靠的数据支持和决策依据.在程序的实现过程中,塌岸预测参数获取主要通过3个途径(1)通过野外调查实测数据


来源:工程地质学报      作者:王小东,戴福初,黄志全     发表于: 2016年1期     

Variation Analysis and Stability Control for Measurement Process

Based on a two-section measuring method, a data collection sheet is formed. According to the data collected, the variation sources of a measurement process are analyzed and general guidelines for variation diagnosis are suggested. In our previous study, a


来源:系统科学与系统工程学报(英文版)          发表于: 2002年3期     

Elastic scattering of two ground-state N atoms

An interaction potential for an N 2 (X 1 Σg+) molecule is constructed by using the highly accurate valence internally contracted multireference configuration interaction method and the largest basis set, aug-cc-pV6Z, in the valence range. The potential is


来源:中国物理B:英文版      作者:施德恒,张小妞,刘慧,朱遵略,孙金锋     发表于: 2010年1期     

一种基于两点线性校正的改进算法

针对传统的两点校正法准确度不高的缺点,提出一种二点多段线性校正的改进算法。这种算法对增益系数和偏移系数重新进行推导,弥补了两点多段校正法中由于校正因子推导带来结果值偏大的不足,并对算法进行了仿真。


来源:科学技术与工程      作者:朱建,刘贵喜     发表于: 2007年6期     

混合整数线性规划近优解的一种解法

所提出的混合整数线性规划的解法是利用目标娅建立等值切割面,综合使用分支定界法、割平面渚儿枚举法,并在求给 整数线性规划相应的线性规划问题时,运用两演段方法,它了上述方法各自单独使用在计算上的某些困难和不足,加速求解过程。


来源:武汉冶金科技大学学报      作者:胡明琼     发表于: 1998年1期     

舰船湍流尾迹的数值模拟及其单站RCS计算

基于舰船湍流尾迹的半经验公式和双线性叠加方法,分别模拟船尾射流尾迹和船侧涡流对尾迹,与湍流实验结论比较,验证了模拟结果的准确性以及方法的有效性.提出一种用双尺度模型结合物理光学法(Physical Optics,PO)计算粗糙面电磁散射的方法,应用该方法计算风驱海面杂波雷达散射截面(Radar Cross-Section,RCS)并与双尺度方法(Two Scale Method,TSM)的计算结果和实测数据比较,吻合得较好,验证了该方法的正确性.应用该方法计算湍流尾迹的雷达散射截面,为数值模拟舰船尾迹的合


来源:电波科学学报      作者:任维君,丁娟娟,刘鹏     发表于: 2016年3期     

居民储蓄存款余额的简便预测法

本文用时序均分法对居民储蓄存款余额进行了简例预测。并通过数学模型和实例说明了该方法比最小二乘法的优越性。


来源:渤海大学学报:自然科学版      作者:李可用,汤明洁,杨天秀     发表于: 1998年3期     

Electron capture in collisions of Li^3+ions with ground and excited states of Li atoms

The electron capture processes in collisions of Li3+ion with Li(1s22s)and Li(1s22p0,1)are investigated by using the two-center atomic orbital close-coupling method in the energy range from 0.1 keV/u to 300 keV/u.The interaction of the active electrons wit


来源:中国物理B:英文版      作者:马茗萱,寇博珩,刘玲,吴勇,王建国     发表于: 2020年1期     

A method of reconstructing 3D model from 2D geological cross-section based on self-adaptive spatial

An orthogonal 2D training image is constructed from the geological analysis results of well logs and sedimentary facies;the 2 D probabilities in three directions are obtained through linear pooling method and then aggregated by the logarithmic linear pool


来源:石油勘探与开发:英文版      作者:WANG Lixin,YIN Yanshu,WANG Hui,ZHANG Changmin,FENG Wenjie,LIU Zhenkun,WANG Pangen,CHENG Lifang,LIU Jiong     发表于: 2021年2期     

Simulation method for measurement of the cross-section of the^(14)N(n,a)^(11)B reaction using a grid

A simulation method for measurement of the cross-section of the14N(n,a)11B reaction with gas and solid samples using a gridded ionization chamber(GIC)has been established.Using the simulation,the experimental spectra of both14
来源:核技术:英文版      作者:Yi-Wei Hu,Hao-Yu Jiang,Zeng-Qi Cui,Jie Liu,Hao-Fan Bai,Huai-Yong Bai,Jin-Xiang Chen,Guo-Hui Zhang     发表于: 2021年8期     

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