我国劳动力转移就业空间特点的经济问题分析

我国农村刺余劳动力转移就业形式，反映了我国的劳动力要素配置方式和效率，也影响各地区的城市化进程。从空间上看，我国劳动力转移就业存在区域差异性、空间流动性、乡村城市不连续性．对我国农业有不利影响，也使劳动力要素配置效率低下，农民工利益流失，城市化推进困难。应采取4个方面的对策，缩小区域差距，促进劳动力合理转移与与城市化水平提高。     

抗美援朝战争与我党对台政策

解放台湾,实现统一,是中共一直坚持的目标。从新中国成立到抗美援朝战争,中共坚持以武力歼灭国民党残余力量,解放台湾。然而,抗美援朝战争使中共中央面临的局势发生重大变化,中共中央被迫暂缓武力解放台湾的步伐。抗美援朝战争结束后,中共中央根据形势的变化,逐渐提出以和平的方式实现统一。     

未经训练成年男性急性运动性疲劳的电刺激研究

运用电刺激的方法研究未经训练成年男性的急性运动性疲劳机制。结果表明:在疲劳性伸膝运动后,最大随意收缩力下降17±15%(p<0.001),中枢激活水平从88±7%下降到84±6%(p=0.001),M波波幅基本不变,但电刺激诱发的最大颤搐张力和最大张力上升速度明显降低,半舒张时间延长,激活后增强效应(postactivation potentiation)下降19%(p<0.001)。疲劳过程中平均肌电图-力矩比值升高。结论:在未经训练成年男性间歇性大负荷运动导致疲劳过程中,中枢神经系统及肌肉本身均参与了运动性疲劳的形成,肌肉的兴奋性未发生明显变化,但收缩能力减弱。     

创造教育是学校体育教学改革的永恒主题

学校体育教学改革正面临从技术教学向健身教育转化，本文以创造教育的理论，以创造、发展的观点，对深化学校体育改革问题试作分析和探讨。     

利用一种新的势能函数精确计算双原子的光谱参数

A novel scheme for potential energy functions of diatomic molecules is derived using a function with phase factors. Six kinds of potential curves of common shapes are obtained by adjusting the phase factors. Spectroscopic parameters of the ground states for ten kinds of molecules are calculated using the potential energy functions. The results agree well with experimental data.     

浅析武术散打运动员爆发力及其训练

爆发力在武术散打中的作用非常重要,是武术散打技击训练的基础。武术散打实战中,通常都是以快速击打、快速闪躲等肌肉快速活动完成技术动作的,没有柔韧,就没有速度,没有速度的力量,就产生不了爆发力。文章采用文献资料法并结合运动训练中爆发力的实际,论述了爆发力的训练方法。     

教育投资效益流失与教育成本补偿

当前,在我国东西部发展严重不平衡,劳动力市场严重分割,市场经济份额越来越大,劳动力流动限制越来越少的条件下,我国劳动力的流动基本上呈现出一种单向流动的特点,即从农村流向城市,从西部流向东部。这种流动态势造成了西部及广大农村地区教育投资效益的流失,拉大了城乡之间和东西部之间的差距,所以必须给这些地区以成本补偿。     

羽毛球正手发球运用"发力法"教学的实验研究

通过对羽毛球正手发球运用“发力法”教学进行实验研究,结果表明,“发力法”教学与常规教学相比,能有效提高发球质量,达到增强学习兴趣及提高课堂教学效果的目的。     

划艇运动力学参数检测与分析

研制了一种集划桨力、划桨过程中桨的偏转角度、艇的俯仰角度和倾覆角度、艇速等多个运动力学参数为一体的新型划艇测试评价系统，实现了对这些参数的同步采集。系统通过传感器（力传感器、角度传感器和速度传感器）将采集到的数据无线传输至计算机，利用自行开发研制的软件系统，教练员可以实时地掌握运动员划船过程中的运动状态。整个系统的重量比较轻，并且数据的主要传输采用无线形式，既保证了教练员实时的了解以往单凭眼睛观测和经验判断而很难得到的一些划桨技术细节信息，同时不会对运动员的正常划船技术动作的产生过多的干扰。     

Perform kicking with or without jumping: joint coordination and kinetic differences between Taekwondo back kicks and jumping back kicks

We investigated joint coordination differences between Taekwondo back kicks and jumping back kicks, and how jumping (in performing the latter) would alter engaging ground reaction forces (GRF) in executing kicking. Ten skilful athletes volunteered to perform both kinds of kicking within the shortest time for three successful trials. Three high-speed cameras and two force platforms were used for data collection, and the trial with the shortest execution time was selected for analysis. Movements were divided into the rotation and attack phases. With comparable execution time and maximum joint linear/angular speeds, back kicks and jumping back kicks differ mainly in larger GRF in the latter, and in greater target acceleration in the former probably because the support leg prevented athletes’ rebounding after impact. In addition, more prominent antiphase and in-phase coordination between the shoulder segment and knee joint, and elongated rotation phase were found in jumping back kicks. Larger GRF values in jumping back kicks were generated for jump take-off rather than for a more powerful attack. In back kicks although the support leg remained ground contact, greatly decreased GRF in the attack phase suggested that the support leg mainly served as a rotation axis.