大跨度公路隧道软弱地质浅埋偏压段施工技术     

栾兆增 《石家庄铁路工程职业技术学院学报》2014,(2):46-49

针对高速公路大跨度隧道在软弱地质、富水、浅埋、偏压等复杂情况下,系统地讨论进洞、开挖施工方法,介绍具有针对性的施工技术方案和具体的施工参数。  相似文献   

Interferential therapy effect on mechanical pain threshold and isometric torque after delayed onset muscle soreness induction in human hamstrings     

Clarice S. Rocha  Fábio J. Lanferdini  Carolina Kolberg  Marcelo F. Silva  Marco A. Vaz  Wania A. Partata 《Journal of sports sciences》2013,31(8):733-742

Abstract

This study was undertaken to examine the acute effect of interferential current on mechanical pain threshold and isometric peak torque after delayed onset muscle soreness induction in human hamstrings. Forty-one physically active healthy male volunteers aged 18?33 years were randomly assigned to one of two experimental groups: interferential current group (n = 21) or placebo group (n = 20). Both groups performed a bout of 100 isokinetic eccentric maximal voluntary contractions (10 sets of 10 repetitions) at an angular velocity of 1.05 rad · s^?1 (60° · s^?1) to induce muscle soreness. On the next day, volunteers received either an interferential current or a placebo application. Treatment was applied for 30 minutes (4 kHz frequency; 125 μs pulse duration; 80?150 Hz bursts). Mechanical pain threshold and isometric peak torque were measured at four different time intervals: prior to induction of muscle soreness, immediately following muscle soreness induction, on the next day after muscle soreness induction, and immediately after the interferential current and placebo application. Both groups showed a reduction in isometric torque (P < 0.001) and pain threshold (P < 0.001) after the eccentric exercise. After treatment, only the interferential current group showed a significant increase in pain threshold (P = 0.002) with no changes in isometric torque. The results indicate that interferential current was effective in increasing hamstrings mechanical pain threshold after eccentric exercise, with no effect on isometric peak torque after treatment.  相似文献   

钟嵘《诗品》鲍照条疏证     

侯琼 《许昌学院学报》2012,31(3):22-25

钟嵘认为鲍照诗源出于二张,其原因主要在于诗歌的感情基调和描写技巧两个方面。鲍诗擅于描摹物象,诗歌艺术在前人的基础上增强了个人特色。由于评价标准的不同,对钟嵘认定鲍照的诗歌成就产生了一定的影响。  相似文献