收缩因子

基于粒子群收缩因子算法的BP网络径流预测模型

Back Propagation Networks Runoff Forecasting Model Based on Constriction Factor PSO

PSO-CF算法初始时在积分区域内随机选取一定的分割点，粒子的速度采用收缩因子进行更新，粒子将朝着更好的位置移动。

PSO-CF algorithm selected some initial partition points randomly in the domain , and used the constriction factor to update the velocity , then the particles would move towards better position .

带收缩因子的PSO算法在齿轮箱故障诊断中的应用

Application of PSO Algorithm with Compression Factor in Gear-box Faults Diagnosis

冠脉病变程度与内皮依赖性舒张功能损害有显著相关性（P＜0.01）（3）肱动脉内皮依赖性舒张功能与血管内皮源性舒张因子及收缩因子含量有显著相关性（P＜0.01）；

The degree of coronary artery lesion significantly correlated with endothelium dependent dilation ( P < 0.01 ); ( 3 ) The endothelium dependent dilation in brachial artery was related to the levels of plasma ET , NO and vWF ( P < 0.01 );

近年来，神经递质5-羟色胺（5-HT，一种强效的血管收缩因子）被认为在偏头痛的发病机制中起着主要作用。

In recent years , the neurotransmitter serotonin ( 5-HT , a potent vasoconstrictor factor ) is considered to play a major role in the pathogenesis of migraine .

结果表明，脑血流内皮舒张因子和内皮收缩因子之间的平衡紊乱是SAH后脑血管痉挛发生的机制之一。

It indicated that the imbalance of endothelium derived relaxing factor ( NO ) and the endothelium derived constricting factor ( ET ) was a major cause of vasospasm after SAH .

肝素对内皮细胞增殖和收缩因子释放的影响

The influence of heparin on proliferation of endothelial cell and release of contractile

提出了一种带收缩因子的混合蛙跳算法。

The Shuffled Frog Leaping Algorithm with a Contraction Factor ( SFLACF ) is proposed .

污泥的收缩因子随着初始干基含水率的降低而逐渐减小。

The shrinkage factor gradually diminishes with the decrease of initial moisture content of drying base .

折流板脉冲萃取柱的结构参数对孔收缩因子的影响

Study on the Effect of Structure Parameters of Discs and Doughnuts Pulsed Extraction Column on Orifice Coefficient

损伤的内皮细胞其血管舒张因子水平明显降低，同时收缩因子水平升高；

When EC were injured , the content of diastolic factor reduced significantly and the content of contracted factor enhanced ;

首先在小波域上对模糊图像去噪，提出按照贝叶斯公式估计出小波系数的收缩因子，恢复出模糊图像的小波系数值。

First , the wavelet coefficients of the corrupted image shrink with the coefficients that are estimated by bayes equation .

观察3组研究对象用药前后血管收缩因子、血管舒张因子的变化。

Changes of vasoconstriction and vasodilatation factors before and after administration in the subjects of the three groups were observed .

数值仿真结果表明，选取合适的尺度收缩因子，能有效提高系统输出的信噪比。

The result of the simulation showed that the equal scale contraction factor can improve the SNR of the system effectively .

收缩因子粒子群优化算法容易陷入局部最优并出现早熟收敛的现象。

The constriction factor Particle Swarm Optimization ( PSO ) algorithm is easily trapped in the local optimum and appeared premature convergence .

该算法引入了收缩因子，对不同频率部分的系数给予不同程度的收缩，不仅保证了对有色噪声压制效果，还最大限度地保留了图像信息。

Introducing the shrinkage factor , the algorithm shrinks every frequency coefficient respectively so as to retain image information while compressing noise .

其发生机制可能与内皮素、内皮衍生收缩因子、内皮衍生舒张因子和一氧化氮等因子有关。

The mechanism of the cerebral vasospasm may be related to endothelin , endothelin-derived constricting factor , endothelin-derived relaxating factor and nitric oxide .

本实验初步证实，急性缺氧可使大鼠肺动脉产生内皮衍生收缩因子，并对其性质作了初步探讨。

This experiment was designed to investigate the secretion and action of acute hypoxia-in-duced endothelium-derived contracting factor ( EDCF ) in rat pulmonary artery .

基于收缩因子改进的粒子群算法可以保证算法的收敛性，同时使得速度的限制放松。

The improved particle swarm algorithm based on constriction factors can guarantee the constringency of the algorithm , while the restriction of velocity can be released .

通过对并合体系的收缩因子、纵横比率计算，以及体系构型的跟踪记录，揭示了团簇的初始温度和团簇的尺寸对并合过程影响的一般规律。

The influences of initial temperatures and the sizes of clusters on the coalescence were revealed by calculating the shrinkages and aspect ratios and by tracking the snapshots of the system configures .

结果：内皮细胞损伤后舒张因子水平降低而收缩因子表达明显增加，救心胶囊可以调节血管舒缩因子的失衡状态。

Results : The results showed the stretch cytokine expression of EC after being treated by LDL decreased , however shrink cytokine expression increased , Jiuxin capsule can improve the unbalance state .

利用噪声图像小波系数的统计特征和小波变换的多尺度特性构造收缩因子，通过收缩因子对图片中的噪声和边缘区别对待。

Using statistical characteristic of contaminated aerial image 's wavelet coefficients and multi resolution decomposition of wavelet transform , shrinkage factors are constructed and used for treating the edge or noise separately .

考虑到∧超子在超核中的类胶作用会使芯集团更加紧密，在自由~9be核的密度矩阵中引进了收缩因子s，调整s使重现∧~（10）be结合能的实验值。

Taking into account the glue-like role of ∧ - hyperon in the hypernucleus , a contraction factor S is introduced into the density matrix of ~ 9Be . The eigenvalues E_ (?)

该方法把线性小波变换后得到的3个高频分量通过球坐标变换后，得到球坐标下3个分量，然后在球坐标中根据图像统计特性设定的收缩因子处理小波收缩去噪。

Three high frequency parts from wavelet transforms are turned into spherical coordinate , in which it applies the method to image de noising by the wavelet shrinkage parameters based on statistical characteristics .

进而设计了带惯性因子和收缩因子的粒子群求解算法对所建模型进行求解，并与常用的求解算法&遗传算法进行对比分析，验证了粒子群算法应用于此类问题的可行性。

At last , a new PSO algorithm with inertia and contraction factors is designed to solve the proposed model and comparative analysis with commonly-used genetic algorithm is given to verify the feasibility of the PSO applied to such issues .

同时利用一个收缩因子来控制代表点的数据分布，这一方法能有效的表示不规则的数据分布，同时对异常数据点也有很好的适应性。

It uses a shrinkage factor to control the data distribution of representative points at the same time . This method is effective to represent irregular data distributions , and have a good adaptability to anomaly point data at the same time .

描述粒子群优化算法，阐述了基本粒子群算法及其改进版本，包括带惯性权重的算法和带收缩因子的算法，并进行了代数分析和解析分析。

The particle swarm optimization algorithm was described , the basic particle swarm algorithm and the improved versions were elaborated , including the algorithm with inertia weight and the algorithm with shrinkage factor , and the algebraic analysis and analytical analysis were performed . 4 .

利用控制理论对基本微粒群算法、标准微粒群算法及带有收缩因子的微粒群算法进行了详细的分析，结果表明它们或为一个积分环节与两个惯性环节组成的系统；

Using control theory , three different particle swarm optimization ( PSO ), such as basic PSO , standard PSO and PSO with constriction factor were analyzed in detail , the results showed that the evolution equations were composed of both integral elements and inertia elements or inertia elements only .

所得的结果是，整体封闭系统的运动热量收缩的收缩因子恰与P-E学派完全一致。

The result is that contraction factor of the motion quantity of heat of closed global system is evaluated ; it is exactly consistent with that of Planck-Einstein school .

进一步得出，运动温度相对固有温度要发生收缩，且温度的收缩因子只与子系统的速度有关而与加速度无关。

We concluded that motion temperature is contractive , and the contraction factor of temperature only relative to the velocity of subsystem , nor to acceleration .