感知机网络模型

文章提出了一种利用人工神经元网络方法-感知机网络实现设计并训练一个印刷字符分类器，程序采用MATLAB5.3实现。     

PON突发式光接收模块的指标及其测试系统

基于ＴＤＭＡ 的无源光纤接入网（ＰＯＮ），具体分析了其关键部件——突发模式光接收模块的性能特点，提出了描述该模块的几项重要指标，设计制作了一具体的指标测量系统并说明了测量步骤．     

宁夏南部黄土高原地区土地适宜性评价研究

根据联合国粮农组织（ＦＡＯ）土地评价纲要的分类体系，采用定性与定量相结合的方法，对宁夏南部黄土高原地区的土地进行了适宜性评价，并给出了该地区的土地适宜性能、质量等级、数量分布及亚级的数量和分布特征．     

鲤鱼胶原蛋白的过敏原性研究

以鲤鱼鱼皮为研究对象,通过碱溶、酸溶、NaCl盐析等方法从鱼皮中分离纯化得到了胶原蛋白.SDS-PAGE分析显示,鲤鱼胶原蛋白由分子质量约为120 ku和115 ku的2条α链（α1与α2）、分子质量约为250 ku的β链以及大分子质量的γ链组成.分析比较鲤鱼胶原蛋白与鲢鱼小清蛋白的基本性质,结果显示：2种蛋白质的pH...     

Development of NiTiNb in-situ composite with high damping capacity and high yield strength

The shape memory alloys are well known to exhibit high damping capacity in martensite state,but possess low yield strength because of the reorientation or de-twining of the martensite variants.The high damping mechanism of shape memory alloys was introduced.The NiTiNb alloys with high yield strength and high damping capacity were designed and prepared.The microstructure evolution,martensitic transformation behavior,damping capacity and mechanical properties of series NiTiNb alloys were investigated.In vi...     

Effects of particle size on the mechanical properties of particle-reinforced Sn-Ag composite solder joint

Particulate size has significant influenced on the mechanical properties of particle-reinforced composite solder joints.In this current research,Cu or Ni reinforcement particles were mechanically added to the Sn-3.5Ag eutectic solder,and the effects of the particle size on the mechanical properties of particle-reinforced composite solder joint were systematically studied. This investigation touched on how mechanical properties of the solder joints are affected by particles size.A quantitative formula was se...     

市场经济下空车流调整问题

分析了现行空车调整方法存在的缺陷 ,提出以运输距离、运输时间、运输费用和换算当量为目标的空车流网络调整方法 ,以及在现行运行机制下改进空车流组织的建议 .进一步从理论上作了较深入的探讨 ,提出市场经济下空车运送机制的新概念和基本要求 .     

A new 3-D Gd–Cu heterometallic polymer [Gd_2Cu_3(bpy)_2-(ip)_6]·6H_2O with a non-interpenetrated α-Po net

A new 3-D porous Gd-Cu heterometallic polymer [Gd2Cu3(bpy)2(ip)6]·6H2O (1) (bpy = 2,2'-bipyridine, H2ip = isophthalic acid) has been hydrothermally synthesized and structurally characterized. Compound 1 crystallizes in the triclinic space group P1and displays a 3-D non-interpenetrated α-Po network with 1-D channels filled transversely by the hexa-nuclear chain-like (H2O)6. The EPR and thermal stability of 1 were investigated.     

Numerical Simulation of the Morphology and Moving Velocity for Electrospun Stable Jet

GAMBIT,POLYFLOW and FLUENT POST were used to simulate the morphology and the velocity of electrospun stable jet.Simulation results shows that jet diameter decreases with the increased draw force acted on the stable jet.But too great draw force would lead to thick knots appearing along the jet or stable jet disappearing during electrospinning.There is a linear relationship between the velocity and the moving distance.But the linear relationship does not exist under great draw force.     

“人文精神”教育下的体育教师角色探析

新世纪的教育以其鲜明的教育理想和浓郁的时代创新气息,呼唤着体育教师角色的转换。体育教师角色的转换正是体育教育在回归"人性"的基础上,在人文关怀的关爱下,以增强体质、增进健康为本质,激发学生的生命热情,发掘学生的精神资源,带着激情,踏着理性的教育。