两种组间练习负荷量设计的上肢力量练习效果对比研究

为揭示上肢力量训练的组间练习负荷量不同设计的练习效果差异,在文献研究的基础上,选取65名男大学生进行实验研究。将被试者分为实验组和对照组,实验组组间练习负荷量参照正态分布曲线变化设计,对照组组间练习负荷量按不变设计,实验时间共18周,每周3次,每次3组。结果显示:被试者俯卧撑、引体向上在练习12、14周后开始呈现明显差异,实验组的练习效果优于对照组。结果说明组间练习负荷量参照正态分布曲线变化设计,对提高男大学生上肢力量更为有效。

Group scheduling with general position-dependent effect

In order to investigate more realistic group scheduling problems with position-dependent effects,the model of general position-dependent group scheduling is proposed,where the actual group setup times and actual processing times are described by general functions of the normal group setup time and position in the sequence.These general functions are not assumed to have specific function structures,and are not restricted to be monotone.By mathematical analysis and proof,each considered problem is decomposed into a group scheduling process and a job scheduling process,and each scheduling process is transferred into the classic assignment problem or the classic single-machine sequence problem,and then the computational complexity to solve the considered problem is analyzed.Analysis results show that,even with general position-dependent job processing times,both the single machine makespan minimization group scheduling problems and the parallel-machine total load minimization group scheduling problems remain polynomially solvable.

关于固网运营商LSTP优化交换机路由选择域和链路选择域设置的探讨

文章介绍了涉及电话通信的重要组成部分——交换网络的日常维护工作中累积的维护技术。同时介绍了关于链路选择域及路由选择域的相关知识。