The research applies the study methods of observing students " behavior , correlation method , individual interview and investigation question to evaluate the teaching effect . we analyze and interpret material of students " action and experiment report 实验研究采用对照、活动分析、问卷调查、个人访谈等方法,诊断被试关于“质量守恒定律”的化学6u科学概念,通过分析被试在课堂上的表现、实验报告、后测调查问卷等材料,判断被试前科学概念的转变情况。
For the issue of blind parameter estimation of dsss / bpsk signal damaged by strong additive white gaussian noise ( awgn ) , this dissertation mainly researches on carrier doubler method ( cdm ) , auto - correlation method ( acm ) , delay - and - multiply ( dm ) method and fourth - order cumulant 2 - d slice method 针对受强高斯噪声污染的dsss / bpsk信号对抗技术中的盲参数估计问题,本文着重研究了平方倍频法、时域自相关法、延迟相乘法三种常规的单参数估计法以及四阶累积量2 - d切片多参数估计法。
Authors used auto - correlation method and took longhua area , shenzhen city , as working area to study the spatial structure characteristics of landscape pattern and their contributing factors . the results indicated that all the landscape structure variables , which were used in the analysis process , expressed good structure features . it means that the landscape pattern of working area was formed by some kinds of driving forces which could not only cover the whole area , but also had good continuity . detailed analysis resulted that the elevation differences were only the background impact factor of the landscape spatial pattern , but the intensive artificial landscape reforming of the fast urbanization process was the main contributing factor , which made the significant differences of landscape structure between 1988 and 1996 . since 1990 , the landscape of working area has gradually changed to a landscape dominated by human impact 利用空间自相关分析方法,以深圳市华地区为例,对快速城市化景观的空间结构特征及其成因进行了研究。参与分析的景观结构变量均表现出较好的结构性,表明该地区景观是在一种既可以覆盖全区,又具有良好连续性的驱动机制作用下形成的。进一步详细分析结果表明,工作区内的地形条件差异是景观空间分布格局成因的背景性因素,而快速城市化过程中人类活动的强烈改造作用,是导致1988年和1996年景观结构特征发生显著差异的根本性影响因素。
In the study , fft and digital filtering calculations are employed to assure measurement precision . experimental studies from industrial systems demonstrated that , fluctuation and correlation methods can be applied on non - spherical opaque particles , the precision are are within 10 % and 8 % respectively 多处工业现场和自制两相流试验系统的测量结果表明,测量颗粒浓度和粒径的精度在10以内,速度测量精度在8以内,证明这种技术可以用于非球形、不透明颗粒的测量。
The shortcoming of spectral detection is its complexity and in need of long time to compute . a simple and powerful approach is cepstrum detection method , which can estimate pn sequence ’ s time period . using this parameter and the pn chip rate estimated by spectral correlation method , we can get another parameter , length of the pn sequence 另外,本文还尝试利用cdma信号的相位重复特性,解决各用户pn序列的分离问题;但这种方法只能在有一定先验知识的条件下,对包含较少用户的ds / cdma信号有较好效果,能够简单快速的实现用户pn序列的分离与估计。
Fourthly , respectively using cross correlation method for estimation of time delay , phase spectrum method for estimation of time delay and high order spectrum method for estimation of time delay , this paper measures time delay estimation of the data obtained because time delay between two signals has big importance on the testing result . through comparing three results , accurate time delay is obtained under their own different circumstances 再次,由于两信号的时间延迟对测量结果有很大的影响,因而研究了用互相关时间延迟估计、相位谱时间延迟估计和高阶谱时间延迟估计的方法对测量数据进行了时间延迟估计,结果表明,三种时间延迟估计方法在各自适应的环境下使用,都能得到比较准确的时间延迟估计值。
Regarding pi1 - 2 oil bearing group in the polymer flooding well pattern in the north part of the north section in lamodian oil field , as the target pay zone , this paper has firstly drawn the sedimentary microfacies maps of each time unit by means of the principle of architecture - element analysis and correlation method of sand member in fluvial - delta depositional system . lt gives a sound geological foundation for classification of plane flow unit . at the same time , this paper has classified vertical flow unit 首先,本文以喇嘛甸油田北北块聚合物驱井网葡i1 - 2砂岩组为研究目的层,应用储层建筑结构解剖的知识和河流-三角洲相油层对比方法,绘制了各沉积单元的沉积相带图,为平面流动单元的划分提供了地质基础,同时,划分了垂向流动单元。
The patent application acceptance and awarding of university was studied in this paper , including patent , utility model and industrial design between 1986 and 2001 , and the comparative studies with other trades have been carried out ; investigations were done on the relationship between university patent applications , the number of researchers and inventors , application of r & d advances , number of technical service personnel , investment of scientific research funds , patent transfer , number of research and development projects , and number of scientific and technological achievement awards in universities ; 547 staff members of the central south university completed the questionnaire ( 32 questions ) regarding the intellectual property right , knowledge of patents , awareness of patent protection and patent - related behaviors , those people were distributed in the departments of teaching , research , administration and management , and teaching support ; one - way anova , multivariate analysis of variance manova and linear correlation methods were used in the analysis of research - related factors concerning central south university staff members and their understanding of intellectual property right , knowledge of patent , awareness of patent protection and patent - related behaviors , the major factors affecting university patent application , awarding and transfer were identified ; countermeasures to promote university patent development in china were also proposed 本研究旨在通过对1986年? 2001年我国高校发明专利、实用新型、外观设计的申请受理与授权情况的分析,并且与其他行业的比较;通过研究我国高校专利申请与高校研发人员数、 r & d成果应用及科技服务人员数、科研经费投入、高校专利转让、研究与发展课题数、科技成果获奖数的关系;通过对中南大学547名教学、科研、党政管理、教辅人员的产权知识、专利知识、专利意识、专利行为的问卷调查(共32题) ,并用单因素分析法、多元逐步回归分析法和线性相关分析法,对中南大学在职人员各研究因素与产权知识、专利知识、专利意识、专利行为的统计分析,寻找出制约我国高校专利申请、授权、成果转让的因素,提出加速发展我国高校专利工作步伐的对策。
Because the signals of the target reflections are coherent , the reconstructing matrix algorithm which uses the time - shift correlation method is studied . not only has it the good ability to solve the coherence problem , but it also reduces the computation because of the time - shift correlation instead of the eigenvalue decomposition 由于雷达系统中目标回波具有相关性,必须考虑解相干处理,所以研究了利用时移相关去噪的矩阵重构算法,该算法具有较好的解相干能力,且用时移相关去噪免去了特征分解去噪过程,可直接使用esprit算法求解旋转不变关系,简化了过程,减小了计算量。