一种使用最小包容区域法基于旋转变换求解平面度误差的方法

此方法是基于旋转变换求解平面度的。它克服了以往计算方法准确度低、无法处理复杂数据的缺点 ,能够快速、准确地处理任意布点方案下测得的数据。     

SURE模型中参数估计的若干结果

综合报导有关ＳＵＲＥ模型中参数估计及其优良性的一些近期研究成果，主要包括回归系数β以及协方差矩阵Ｖ的各种估计和它们的优良性．     

奇异积分的最小二乘求积公式

引进最小二乘多项式簇｛ Ｑｎ（ｘ）｝ ，由Ｑｎ（ｘ） 的零点出发作插值多项式，得到了奇异积分的一类求积公式，它的特殊形式为Ｇａｕｓｓ 型求积公式．     

将军饮马与最小二乘法——谈数形结合的思想方法

本文介绍体现数形结合思想方法重要性的两个十分精彩的例子.     

微系统快速生物制造的可行性

微系统的制造工艺是一个重要研究方向.制造工艺限制了微系统的尺度.增强对微米、纳米或更小尺度材料单元的操纵能力将进一步缩小微机械的尺度.阐述了生物制造的涵义.将RPM设计学原理和微生物学结合起来,提出了快速生物制造的原理及其实现方法的可行性.     

C语言在热敏电阻温度特性实验中的应用

热敏电阻温度特性实验中，由于电阻与温度之间的关系为指数关系，使得实验数据的处理变得非常复杂。本文提供了用C语言编制的一个通用程序，对热敏电阻温度特性实验数据进行处理，避免了传统方法的弊端，C语言的绘图功能也可以更加直观地反映实验结果。     

Application of NIR spectroscopy for firmness evaluation of peaches

The use of near infrared （NIR） spectroscopy was proved to be a useful tool for quality analysis of fruits. A bifurcated fiber type NIR spectrometer, with a detection range of 800-2500 nm by InGaAs detector, was used to evaluate the firmness of peaches. Anisotropy of NIR spectra and firmness of peaches in relation to detecting positions of different parts （including three latitudes and three longitudes） were investigated. Both spectra absorbency and firmness of peach were influenced by longitudes （i, ii, iii） and latitudes （A, B, C）. For modeling, two thirds of the samples were used as the calibration set and the remaining one third were used as the validation or prediction set. Partial least square regression （PLSR） models for different longitude and latitude spectra and for the whole fruit show that collecting several NIR spectra from different longitudes and latitudes of a fruit for NIR calibration modeling can improve the modeling performance. In addition, proper spectra pretreatments like scattering correction or derivative also can enhance the modeling performance. The best results obtained in this study were from the holistic model with multiplicative scattering correction （MSC） pretreatment, with correlation coefficient of cross-validation γcv=0.864, root mean square error of cross-validation RMSECV=6.71 N, correlation coefficient of calibration r=0.948, root mean square error of calibration RMSEC=4.21 N and root mean square error of prediction RMSEP=5.42 N. The results of this study are useful for further research and application that when applying NIR spectroscopy for objectives with anisotropic differences, spectra and quality indices are necessarily measured from several parts of each object to improve the modeling performance.     

省力原则与语言的选择

本文旨在研究"省力"本能是如何影响语言选择的,同时表明情况的紧急性使我们只能以最小的努力来说话.这种在紧急压力下依据"省力"来有效表达语言的倾向,虽然压缩了语言,但也导致了话语不连贯问题的出现.使话语连贯的最好办法就是借助共有知识.     

Influences of NMMO Content in Coagulation Bath on Mechanical Proper-ties of Lyocell Fibers

The influences of the coagulation bath concentration in N-Methyl-Morpholine-N-oxide(NMMO)processon the maximum spinning speed and the mechanicalproperties(the modulus,the tenacity and the extensionat break)of Lyocell flbers are investigated.The resultsshow that the maximum spinning speeds decrease withthe increasing coagulation bath concentration.When theconcentration of coagulation bath is 10％(wt％),the te-nacity and modulus of the obtained Lyocell fibers reachmaximum and the extension at break of the fibers reach-es minimum.