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The orthogonal Latin hypercube design and its relaxation,and column-orthogonal design,are two kinds of orthogonal design......
A conception of exposure degree is used in this article to account for the hiding and exposure mechanism of nonuniform s......
Studies on the identification and synthesis of insect pheromone——ⅩⅪⅤ.Synthesis of(7R,8S)-(+)-and(7S,
Condensation of the epoxy aldehyde 2 or 2’ prepared by Sharpless asymmetric epoxyda-tion in 96—97% yield,with trimeth......
The LaNi_2Si_2 alloy was prepared in a water-cooled copper crucible in an are melting furnace With a non-self-consume W......
The virtual machine of code mechanism (VMCM) as a new concept for code mechanical solidification and verification is pro......
Stability of soil organic carbon changes in successive rotations of Chinese fir(Cunninghamia lanceol
The importance of soil organic carbon(SOC) under forests in the global carbon cycle depends on the stability of the soil......
Propagation properties of electromagnetic fields in elliptic dielectric hollow fibres and their appl
We numerically calculate and analyse the electromagnetic fields,optical intensity distributions,polarization states and ......
A novel random walk coefficient(RWC) model of the interferometric fiber optic gyroscope(IFOG) to decompose fundamental n......
Rotating flow systems are often used to study stability phenomena and structure developments. The closed spherical gap p......
Effects of blade bowing on the performance of a high pressure-ratio turbocharger centrifugal compres
The effects of blade bowing on the performance of a high pressure-ratio turbocharger centrifugal compressor were studied......
The dynamics of a supersonic missile with a deflectable nose are studied. To describe the effects of nose deflection on ......
LOCATED in the heart of Beijing, Zhihua Temple is an oasis of tranquility in this busy metropolis. It is not only the la......
A new triterpenoid,possessing a lanost-9(11)-3-one skeleton,was isolated from the roots of Kadsura coccinea,based on the......
We use the Centroid Moment Tensor(CMT) solution of the earthquakes occurred in Chile subduction to analyze the character......
Resonance-enhanced multiphoton ionization (REMPI) spectra of N32S and N34S have been recorded in the range of 35700―402......
This paper summarizes the modeling methods, open-loop control and closed-loop control techniques of various forms of cra......
Aiming at the problem of reverse-design of mechanism, a method based on the matching of trajectory code-chains is presen......
By solution culture experiment, three wheat genotypes (Ttiticum aestivum L.) and two oilseed rape genotypes (Brassica na......
The theory of barotropic, shallow-sea ocean currents and storm surges considered from the viewpoint of air-sea interact......
The earth system discussed in this paper is composed of two secondary particle systems: a water body and a base body. T......
Data sets of the changes of the length of day, the sea surface temperature in the eastern Pacific and of the sea level ......
The vertical thermohaline structure in the western equatorial Pacific is examined with a Gravest Empirical Mode(GEM)diag......
With the T-C recognition task in BP neural network finished, the final distributions of weights between input and hidde......
This paper intends to introduce the active vision system with autonomous robot competition in the background. It presen......
The rotation resistance coefficient is an important operating parameter for the vehicle bogie,which influences upon the ......
Application of Lie algebraic method to the calculation of rotational spectra for linear triatomic mo
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
目的:分析颈椎中段失稳诱发颈性眩晕及观察旋牵手法治疗的疗效.方法:收集整理入住我院的80例颈性眩晕患者的临床资料,分析排除引起......
在对机床进行故障诊断过程中，对齿轮箱的检测至关重要。综合分析齿轮箱的振动频谱可以快速、准确地确定故障产生的原因以及故障位置......
在用机器视觉在线自动测量大尺寸零件的直线轮廓尺寸时，为了消除序列图像拼接中的旋转偏差，提出了一种基于链码搜索的新算法．将序列图......
水轮发电机组作为发电环节中的重要组成设备之一,发挥着十分重要的作用,直接影响着发电工作的稳定性和可靠性。基于此,本文依照水......
作物株高是体现作物长势的重要指标。为此,针对现有基于图像分析测量方法需设置标定物、图像分割困难、精度不高的问题,提出一种基......
转动矩阵在角动量理论中起着非常基本和重要的作用,它已经被推导通过使用各种方法.提出一个新的方法研究角动量算符的本征态和转动......
为了方便票据和证件的存取，运用数控传动和控制的原理，采用三维操作方法，设计制作了票据证件管理柜，可有效节省储存空间，并提高工作效率......
针对一种永磁悬浮回转系统的回转特性进行分析。介绍了永磁悬浮回转系统的结构和铁球的回转原理,并在此基础上用实验验证回转的盘......
交流采样在一类旋转机械设备的状态信息监测过程应用广泛,它的算法和方法很多,但是频率参数总是直接或间接地对其它系统参数的准确......
目的应用高频超声结合二维斑点跟踪成像技术对犬生理状态下左心室前壁局部心肌旋转运动进行力学分析,结合病理技术,探讨局部心肌旋......
针对工业缝纫机伺服系统的技术指标：电机转速响应时间、停车性能的测量方法进行研究。对伺服控制系统引出的正交编码器A,B信号和停......
介绍了一个在线监测系统的ORACLE数据库开发,给出了数据库的概念设计和逻辑设计的过程和实现,概述了数据库物理设计的原则和几点实......
理论分析了单电子白旋与碳纳米管机械谐振器之间的耦合对系统动力学行为的影响。用一个主方程，通过半经典的方法具体研究了系统在有......
目的：观察不同体位下急性肺损伤（ALI）肺的氧合功能、呼吸力学、肺CT等的变化，探讨不同体位的效应和机制。方法：采用油酸型ALI兔模型，分为......
通过仿真实验对鱼眼图像匹配扩散过程中的三种模型进行量化的比较，从而得出鱼眼图像在不同的情况下更适合用何种模型来进行匹配扩散......
在研究经典Ｍ－集构造方法的基础上，进一步将复多项式虚实部互换构造广义高阶Ｍ－集并对Ｍ－集的特征进行了分析研究，根据作者提出的旋转逃逸时间......
文中对文献[1]的算法进行了分析,解决了其中一些步骤的重复计算的问题,并且,通过采用 FFT 来优化 Chirp Z 变换的计算,在此基础上......
在详细分析频率步进雷达旋转微动点目标回波特征和一维距离像特点后,利用不同帧之间构成的慢时间一维距离像组的相关性,合成得到时......
目前，混沌在各学科中被广泛应用。许多数学家构造出具有不同性质的混沌集，这为其他学科对混沌的应用打下了良好的基础。以圆盘上特殊......
水轮发电机组振动因素很多,为分析解决水轮发电机组常见振动故障,从水力、机械、电气方面分析水轮发电机组的常见振动原因,并详细......
对FFT变换进行了模型分析,用移位寄存器存储旋转因子的方法,设计实现了基于FPGA的FFT算法,并以16位长数据,64点FFT为例,在Quartus......
为了抑制高动态环境下捷联惯导姿态解算时的误差,对五子样等效旋转矢量算法进行了推导;并在锥运动环境下进行了仿真验证.通过与四......
滑动轴承支承的旋转机械支座松动故障的转子振动信号特征易与转子不对中、裂纹、碰磨等故障特征混叠,从而造成误诊。针对此问题,从......
对不同电导率基底的旋波介质进行测量,给出一种在自由空间测量旋波介质手性参量的方法.通过测量两次复反射系数、透射偏转角和椭偏......
