宜万铁路堡镇隧道右线穿过极高地应力地段

经过中铁五局集团500多名参战职工精心组织、顽强拼搏，宜万铁路堡镇隧道右线于日前安全穿过了1100mV级围岩（炭质页岩）极高地应力地段。     

东安汽发的进取心

哈尔滨东安汽车发动机制造有限公司虽然成立仅有十几年，但是它利用本身的优势，通过与三菱以合资合作形式引进技术和产品项目，并严格要求自己，以“四化”、“六力”理念为标准。在不断的学习中一步步成长、一天天强大起来。     

等粒径球体三维体心立方堆积体接触力传递模型研究

基于等粒径球体三维体心立方堆积体的排列特点,提出了力均匀传递分配等五条基本假设,建立了竖向均布荷载作用下,等粒径球体三维体心立方堆积体中接触力竖向分量的计算模型,并利用该模型计算了相应堆积体中不同位置处的球体的接触力竖向分量,分析了堆积体内部接触力的理论分布规律。     

我们是如何做好2008年奥运卫生保障工作的

为做好北京奥运会和残奥会的卫生保障工作，济南铁路局高度重视，按照铁道部的要求，精心组织，细致筹划，努力工作，确保了奥运期间管内无突发公共卫生事件发生，保证了铁路安全生产和广大旅客及职工的身体健康。具体措施如下：     

关于装用转K2型转向架旁承调整的方法介绍

通过对现场的调查研究,提出了有关装用转K2型转向架旁承调整的方法     

Nitroglycerin reduces augmentation index and central blood pressure independent of effects on cardiac preload

Objective To determine whether reduction In central pressure augmentation and central systolic blood pressure by nitroglycerine (NTG) results from effects on pre-lead or is due to arterial dilation. Methods We compared effects of NTG with these of lower body negative pressure (LBNP). Hemodyunmic measurements were made at rest, during LBNP (10, 20 and 30 mmHg, each for 15 min) and after NTG (10, 30 and 100μg/min, each dose for 15 min) in ten healthy volunteers. Cardiac pre-lead, stroke volume and cardiac output were assessed by echacardiography. Central pressure an mnentation and central systolic pressure were obtained by radial tonometry using a transfer function. Results LBNP (20 mmHg) and NTG (30μg/min) reduced pre-lead (as measured by the peak velocity of the S wave in the superior vena eava) to a similar degree [by (26. 8 ± 3.8) % and (23.9 ± 3. 4) %, respectively]. Compared to LBNP, NTG reduced systemic vascular resistance [by (32. 9 ± 7.5) %, p< 0. 01], decreased peripheral and central pressure augmentation [by (20. 8 ± 3. 4)% units and (12. 9±2. 9)% units, respectively, each P< 0. 01]. Conclusion These results suggest that a reduction in pre-load does not explain reduction in pressure augmentation and central systolic blood pressure by NTG and that these effects are mediated through arterial dilation.     

公路绿化养护中椰心叶甲虫害的防治方法

就养护大王椰子时如何防治椰心叶甲的问题,通过分析其生物学特性和传播途径提出了相应的防治方法,为公路部门加强棕榈科植物的管养提供借鉴。     

调身不如调心

随着汽车保有量的增加,城市饱受交通恶化的折磨,道路交通事故数字居高不下。面对这样的环境我们不可能立即改变,不如把健康、平衡的心态放在第一位。古人云＂养形不如养神,调身不如调心。＂调整好人的心态,有了好心情才有了健康身体的基础,维护健康的交通环境也如是。