因子模型

PARTⅡCharacteristic of MMP-9 Activation in Microglia and itsCytokines Secretion after HSV-1 infectedObjective: To investigate the characteristic of MMP-9 activation in microglia and itscytokines secretion.Methods: Balb/c mice were injected intracerebrally with herpes simplex virus type 1(HSV-1) to form herpes simplex encephalitis.

第二部分HSV-1感染小胶质细胞后MMP-9及炎性因子分泌特点研究目的：研究单纯疱疹病毒(HSV-1)感染小胶质细胞系BV2后炎性因子的表达特点，探讨BV2细胞可否作为小鼠单纯疱疹病毒性脑炎模型的替代研究对象。

Kier s molecular shape indices(~1 K,~2 K)are calculated for 165 nonionic organic compound s.

通过分子形状指数及苯环因子建立有机物生物富集因子B_(CF的良好QSAR模型，计算了165种非离子性有机物的分子形状指数(~1K、~2K)。

Based on fouling monitoring of boiler,this papers studied on method based on minimal cleanliness factor to determine sootblowing opportunity, method based on best frequency to calculate critical cleanliness,method base on the principle of maximal heat income caused by sootblowing to determine sootblowing period, method based on the principle of safety first to determine sootblowing schedule. All the above methods together can determine the correct schedule to sootblowing system.

基于锅炉各受热面的实时监测模型，本文在保证设备安全运行的前提下，从经济性出发，提出了基于临界清洁因子确定最佳吹灰时机和根据吹灰收益最大原则确定最佳吹灰周期，并给出基于吹灰最佳频率确定临界清洁因子的方法，给出制定合理的吹灰方案的步骤。

The method can reduce the dimensions of the data and the complexity, and raise the efficiency of training and the accuracy of prediction. The effect extent to the earthquake-resistance performance of these factors can be obtained in the model.

该模型不但能有效降低建筑物震害影响因子数据维数及支持向量机的复杂程度，提高训练速度和分类精度，而且还能对各因子的影响程度进行排序。

Sample data were selected by standard deviation law and factor variables were selected by the method of principal components analysis, stepwise and enter regression analysis. The forecast precision of the model is 87.35%.

样本数据筛选采用标准差法，因子变量筛选采用主成分因子分析法、多元线性回归的逐步回归和强行进入法等方法，建立的多元回归模型预测总体精度达到87.35%。

At last, through the analysis of the T-stress, it is concluded that the T-stress plays an important role for the oriented microcrack cases. It is necessary to consider the effect of the T-stress in determining the shielding or amplification effect of the oriented microcracks.

最后，本文采用离散模型研究了各向异性材料主微裂纹干涉问题中T应力对主裂尖应力强度因子的影响：T应力对主裂尖应力强度因子的影响是不能被忽视的，这种影响不但与微裂纹的几何分布有关，而且还与T应力的大小和符号有关。

Our purpose is to try to understand some long-standingproblems in light baryon which include (1) The energy level or-der between the positive- and negative- parity partner states,in particular, Roper resonance puzzle;(2)The baryon spin-orbitstructure puzzle-the absence of spin-orbit effects in baryon spec-trum;(3)The calculated amplitudes of nucleon form factors droptoo fast and the uncertainty of the multipole strength in thetransition process of rN →△.

我们的目的是试图解决以往组分夸克模型在轻重子系统的研究中存在的几个问题：(1)重子谱中正负宇称配对态的能级次序，特别是Roper共振之谜；(2)重子谱中自旋轨道看不见之谜；(3)核子形状因子随转移动量增大而下降过快及核子到其共振态光和电生过程中多极子强度和形状因子的不确定性。

A method is proposed in order to accelerate the convergence of artifcial neural network modeling of chemical process,in which the principal components analysis is applied in the data processing in training sets.

文摘：达到提出应用主成分分析法对样本进行预处理，减少网络的输入因子数，消除输入因子间的相关性并简化网络结构，达到提高网络学习速率的目的，得到的人工神经网络模型能达到所要求的精度。

It is antinomy to analysis factor effects according to first and second order term index of quadratic polynomial,so this paper put forward a new method to explain and evaluate factor effect by F test based on partial regression sum of squares.

传统的二次多项式回归方程在依系数正负、大小解释各因子效应时，常出现一次项与二次项结果相互矛盾的情形，而一般的SVR模型又不具解释性；本文从偏回归分析定义出发，建立了基于SVR以F测验解释、评价各因子相对重要性的方法。

In this paper, we use approximate distribution comes from probability generating function in estimating credit VaR. Further, we perform the credit VaR sensitive analysis for multi-sector factors based on different sector correlation assumption.

本文在信用风险加成模型之下，利用机率产生函数的近似分配计算信用风险值，并在多个部门因子中，在不同相关性部门因子分配假设下，比较信用风险值之敏感度分析。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失