The Shanghai composite briefly fell below 1,000 and many thought its pulse would stop soon afterwards. 上证综合指数一度跌破1000点,许多人曾认为,这一市场很快将走到尽头。
Polyaniline-tungsten trioxide ( PANI-WO_3) composite film was synthesized on the surface of titanium electrode by pulse potentiostatic method. 采用脉冲电位法在钛电极表面合成了聚苯胺-三氧化钨(PANI-WO3)复合膜。
Theory and experiments show that the decoupling sequences. NEW-16 and NEW-32, which are incorporated by the new composite pulse, have about 30% wider decoupling bandwidth than the sequences: MLEV-16 and WALTZ-16, which are usually used for broadband decoupling. 理论和实验表明,由此组合脉冲组成的去耦序列:NEW16、NEW32,去耦谱宽比常用的去耦序列:MLEV16、WALTZ16的去耦谱宽增加约30%。
Aluminizing and aluminizing dispersed Y 2O 3 composite coatings were prepared on 20 steel specimens by pulse spark technique, which exhibited a micro crystallized structure with grain size in the range of several tens to several hundred nanometers. 采用电脉冲沉积技术在20碳钢表面上获得了冶金结合的晶粒尺寸约为几十到几百纳米的铝化物和铝化物+弥散Y2O3复合微晶涂层。
Morphology and Tribological Behavior of Ni/ n SiO_2 Composite Coating Prepared by Pulse Current Brush Plating 镍基纳米陶瓷颗粒脉冲电刷镀复合层的形貌及磨损性能
A Research on Microhardness of Ni-ZrO_2 Nano Composite Deposits Electroformed under Direct and Pulse Currents 直流和脉冲Ni-ZrO2纳米复合电铸层显微硬度的研究
Composite pulse NMR with phase alternation 相位交替组合脉冲NMR
In this article we describe the composite π pulse sequence NMR with phase distortion and give a theoretical analysis. 描述了相位变形组合π脉冲序列核磁共振,进行了理论分析。
The Ni/ nano-SiC composite coating with smooth surface was obtained by the fast pulse plating on the stainless steel board. 采用高频脉冲电源,在不锈钢板上制得镍基纳米SiC复合镀层,镀层表面光洁平整、SiC含量较高。
Effects of Trapping Parameters of Composite Materials on Its Surface Flashover Under High-Voltage Pulse in Vacuum 复合材料的陷阱参数对其在真空中高压脉冲下沿面闪络特性的影响
In Chapter II, nonlinear dynamic buckling of symmetrically laminated composite shallow spherical shells under uniform rectangular pulse is investigated. 第二章研究了均布矩形脉冲和爆炸冲击两种冲击荷载作用下的复合材料层合扁球壳非线性轴对称冲击动力屈曲问题。
In this paper, the formation mechanism of nanocrystalline in electrodepositing was analyzed, and some effect factors on refining grain, such as process parameter, composite electrodeposition, pulse electrodeposition, organic addition agent and other means were discussed. 本文分析了在电沉积过程中纳米晶形成的机理,探讨了工艺参数、复合电沉积和脉冲电沉积、有机添加剂以及采用其它工艺措施对晶粒细化过程的影响。
In composite brush plating process, the existence of nano particles and pulse reverse current increase the nucleation rate and restrain the grain growth, which results in the refinement of nanocrystalline. 复合电刷镀过程中纳米颗粒的作用及脉冲换向电流,能进一步提高镀层的形核率及抑制晶粒的生长,从而减小纳米晶的尺寸。
A circuit is suggested for a practical implementation of most composite pulse decoupling sequences with the Varian XL-200 NMR spectrometer. 本文还提出了一种电路,使现已提出的大多数组合脉冲去耦序列,能在VarianXL&200NMB谱仪上实现。
The experimental results show that the ply sequences play a significant role in laminated composite material properties and delaminations have a significantly effect on dynamic pulse response of laminated beams. 实验结果表明铺层角度是决定材料性能的主要原因,脱层损伤的存在及大小对动力响应和发生动力屈曲有重要影响。
A Study of the Technology of ( Ni-P)-nanometer SiO_2 Composite Pulse Electroplating 脉冲复合电镀(Ni-P)-纳米微粒SiO2工艺
On-line Detecting System for Composite Insulators Based on Pulse Current Method 基于脉冲电流法的合成绝缘子在线检测系统
A Composite 180 ° pulse ( Indicated by Rx ( 180)) for the population inversion in solid state NMR systems is presented. 本文提出了一个固态NMR体系中的组合180°脉冲Rx(180°),用于宽带布居数反转。
Pulse laser was used to weld SiCw/ 6061A1 composite in this paper. The effects of parameters such as output power, pulse frequency and surface treatment condition on strength of welded joint were studied. 采用脉冲激光进行诱导焊接SiCw/6061A1铝基复合材料,研究了激光功率、脉冲频率、表面处理状态等工艺参数对接头强度的影响。
For a long laminated composite cylindrical shell subjected to uniform radial impulse, the pulse buckling equations including transverse shears and rotatory inertia are derived by using Lagrange equation. 针对无限长复合材料层合圆柱壳或圆环受均匀径向脉冲冲击作用下的动力屈曲,采用Lagrange方程导出包含横向剪切变形和转动惯量的屈曲控制方程;
Through considering the practical composite mechanism of carrier in amplifier, the time domain distribution of the pulse after the pulse data stream passing through the amplifier is simulated by a numerical method and is compared with the results obtained with constant carrier lifetime approximation. 通过考虑放大器中载流子的实际复合机制,数值模拟了脉冲数据流通过放大器后脉冲的时域分布,并与采用常数载流子寿命近似所得的结果进行了比较。
Study on the preparation of Ni-PAN composite electrode with double pulse electroplating and its hydrogen evolution property 双脉冲电沉积制备Ni-聚苯胺复合电极及其析氢性能的研究
Analysis of impact buckling of laminated composite shallow spherical shells subjected to rectangular pulse 矩形脉冲作用下复合材料层合扁球壳的冲击屈曲分析
This paper mainly content to have the following several parts: ( 1) The Lead-acid battery restoration theory is introduced, and put forth the composite pulse restore methods. ( 2) The electrical energy transform circuit is designed. 本文主要内容有以下几个部分:(1)对铅酸蓄电池的修复理论进行了介绍,提出了采用复合脉冲进行修复的法法。(2)设计了电能变换电路。
The current research status of Ni-B, Ni-W, Ni-W-B composite coatings at home and in abroad is discussed in this thesis, and the author puts forward a new method to obtain RE-Ni-W-B multifunctional composite coatings by means of pulse electrodeposition. 本文阐述了目前国内外Ni-B、Ni-W、Ni-W-B等复合镀层研究现状,在此基础上,作者提出了一种利用脉冲电沉积来制取RE-Ni-W-B复合镀层的新方法。
A selective-excitation RF pulse that uses hard pulses composed of a sequence of composite pulses with positive and negative phases ( P/ N pulse) was proposed herein. It can be used for imaging studies to improve the efficiency of amplification at the lowest cost. 为提高射频功率放大器的效率,降低仪器的成本,我们提出了正负相位组合(P/N)选择性激发脉冲。
In shot process, Composite barrel comes under propellant gas with high temperature and high pressure pulse style high speed impact, the projectile packed into action, cartridge belt guiding turns action, and axial tension action of the recoil mechanism. 复合材料身管在使用过程中,受到高温、高压火药燃气脉冲式高速冲击作用,弹丸的挤进作用,弹带的导转作用,以及反后坐装置的轴向拉伸作用。
The suspended amount of nano TiN composite particle, ultrasonic power and pulse current density is several main parameters, which influence on the property of composite electroforming layer and the proportion of composite particle. n-TiN粒子的悬浮量、超声波功率和脉冲电流密度是影响复合铸层中复合粒子含量和性能主要因素。
With the popularization of personal computers, a PC-based composite noninvasive testing sensor for cardiogram and pulse wave for real-time monitoring of the family is the main work of this paper. 随着个人计算机的普及,研制一种基于个人计算机的集约化复合型心脉无创检测传感器,适用于家庭的实时病理监测是本文的主要工作。
Combined the pulse wave signals of the patients with gestational hypertension syndrome, the research how to produce composite pulse by the single-factor pulse had been done. 结合通常表现为数滑复合脉象的妊娠期高血压综合症患者的脉搏波信号,研究了将单因素脉象叠加产生复合脉。