试论西部大开发战略

实施西部大开发战略，加快中西部地区的发展，是江泽民对邓小平“两个大局”思想的具体运用，也是对邓小平“两个大局”思想的丰富和发展。实施西部大开发战略，有利于改善我国的生态环境，维护社会安定、民族团结及边疆安全，增强国际竞争力。因此，运用新思路、新方法、新机制加快西部大开发，已成为我国的当务之争，重中之重。     

基于改进遗传算法的图像相关匹配

针对图像匹配的数学特点,设计一种新的改进遗传算法用于相关图像匹配。根据基因位的影响和参数调整策略,采用半确定性和大变异结合,汉明距离控制的方法。仿真结果表明,新算法在收敛性能上大大优于简单遗传算法和经典序列猜测算法。     

论实施混合教学模式的必要性和现实性

教学过程信息化改革是教育信息化的核心构成,高校扩招引发的新问题新挑战使这一改革更形迫切。整合了传统教学模式和网络教学模式的整体优势的″双轨″式教学模式,成为稳步推进教学信息化进程中一个具有现实性和必要性的选择与过程。     

建筑风景画的美学品格与文法范式

建筑风景绘画样式除了各种表现策略外,还有自身的文法范式及构成它自身的表意元素.学习和掌握建筑风景画,有利于提高建筑表现图画的专业表达能力;通过准确反映甚至强化建筑设计意图,增强对建筑、自然的了解,可为建筑设计积累专业素材和专业养分.在绘画表现中,真正掌握建筑风景画的文法范式,对提高建筑风景的审美品格与价值有着十分重要的现实意义.     

Effect of gender on trunk and pelvis control during lateral movements with perturbed landing

In lateral reactive movements, core stability may influence knee and hip joint kinematics and kinetics. Insufficient core stabilisation is discussed as a major risk factor for anterior cruciate ligament (ACL) injuries. Due to the higher probability of ACL injuries in women, this study concentrates on how gender influences trunk, pelvis and leg kinematics during lateral reactive jumps (LRJs). Perturbations were investigated in 12 men and 12 women performing LRJs under three different landing conditions: a movable landing platform was programmed to slide, resist or counteract upon landing. Potential group effects on three-dimensional trunk, pelvic, hip and knee kinematics were analysed for initial contact (IC) and the time of peak pelvic medial tilt (PPT). Regardless of landing conditions, the joint excursions in the entire lower limb joints were gender-specific. Women exhibited higher trunk left axial rotation at PPT (women: 4.0 ± 7.5°, men: ?3.1 ± 8.2°; p = 0.011) and higher hip external rotation at both IC and PPT (p < 0.01). But women demonstrated higher knee abduction compared to men. Men demonstrated more medial pelvic tilt at IC and especially PPT (men: –5.8 ± 4.9°, women: 0.3 ± 6.3°; p = 0.015). Strategies for maintaining trunk, pelvis and lower limb alignment during lateral reactive movements were gender-specific; the trunk and hip rotations displayed by the women were associated with the higher knee abduction amplitudes and therefore might reflect a movement strategy which is associated with higher injury risk. However, training interventions are needed to fully understand how gender-specific core stability strategies are related to performance and knee injury.     

关于熵的几点注记

对熵概念的泛化进行了诠释.     

校本课程评价研究综述

我国的校本课程评价研究存在着对实践问题关注不够、独创性不高、研究不够深入以及忽略不同类型校本课程之间的区别等问题。为此,需要采取课程研究模式向课程实践转变、课程评价理论由引进向转化和创生转变、研究中坚持全面、整合的课程价值观等相应之策略。     

自力式流量控制器在热网中的应用

开滦荆各庄热水采暖系统98年以前采用普通阀门调节流量，定量困难，由于在检修过程中频繁开关，导致调节功能失效，供暖用户冷热不均。自98年后逐步改用了自力式流量控制器进行流量控制，改后，在使用过程中解决了以往存在的各种问题，实现了节能节水的效果。     

小学数学课堂练习设计的策略

在小学数学教学中,练习课约占总教时的一半多,几乎没有一节课是只讲不练的。古人云:"拳不离手,曲不离口"。可见练习的重要性,如何探索新课程理念下的课堂练习设计,是广大教师共同关注的课题。教师可根据教学内容,紧扣教学目标,设计有"坡度"、"难度"、"密度"的练习,加大知识"跨度,"变换练习角度,提高练习设计的有效性。     

制冷机组的能量调节策略分析

冷冻站设备中制冷机组的电耗是影响制冷效率高低的重要因素，提高制冷机组的制冷效率是节能的关键环节。根据制冷机组的运行特性，可以通过制冷机组的台数控制达到节能的目的。而提高温度传感器和流量传感器的测量精度，对冷冻水温进行再设控制是群控的两种重要策略。