用最大熵法进行沥青路面工程实例的结构可靠性分析

结合工程实例以蒙特卡罗分析法为基本出发点,首先通过计算机根据弯沉和弯拉应力的功能函数来生成1000个功能函数的一个随机抽样,然后用大熵法拟合沥青路面的弯沉功能函数的密度函数,求出两种失效模式的失效概率。同时,把整个路段看作是一个由弯沉失效和弯拉应力失效的两种失效模式串联组成的网络系统,对整个系统进行了可靠性评估。     

基于鸡西市第一中学新校区规划建设的思考

在鸡西市第一中学建设新校区的规划设计中,通过对总体布局、交通组织、场区竖向、运动场地及校园绿化等方面做详细的设计思考后再进行规划设计,使其设计效果和使用功能都达到了国家级示范高中的标准,推动了教育改革向更深层次发展。     

Soil conservation on road embankments using palm‐mat geotextiles: field studies in Lithuania

The application of geotextile mats constructed from the palm leaves of Borassus aethiopum (Borassus) and Mauritia flexuosa (Buriti) was investigated in field experiments. The use of geotextiles caused improved soil moisture storage during dry summer periods on a steep (21–25°) roadside slope in Lithuania. The enhanced soil moisture under the Borassus and Buriti mats encouraged better root development of perennial grasses, increased the number and weight of earthworms and increased the dry biomass of perennial grasses by 50.5 and 18.2%, respectively, compared with a grassland control. The mean rate of water erosion from bare soil during the study period from 17/04/2007 to 11/12/2008 was 33.21 Mg/ha. The cover of palm‐mat geotextiles decreased soil losses from bare fallow soil by 94.8–91.1%. An erosion rate of 0.85 Mg/ha over this 21‐month period was measured on the slope under perennial grasses without geotextile cover. Application of geotextile cover on perennial grasses completely prevented soil erosion by water. Therefore, use of geotextiles has clear soil and water conservation benefits on industrial slopes susceptible to erosion. The use of geotextiles has multiple benefits including soil conservation, the improvement of plant growth conditions and the encouragement of earthworm populations.     

辽阳县城市道路绿化建设与发展对策

本文介绍了辽阳县城市道路绿化的现状和主要做法,分析了城市道路绿化存在的问题,从绿地规划、树立节约型绿化理念、科学植绿、依法治绿方面提出了城市道路绿化的发展对策。     

绿视率在城市道路绿地设计中的应用

分析城市道路绿地的界定及城市道路绿地在城市中发挥的作用；结合绿视率及其相关理论，论述绿视率的基本特征，结合沈阳市城市道路绿地设计，从城市道路绿地设计的角度阐述绿视率在实际工作中的应用。     

提高玉米产量的“四防六技巧”

玉米在生长过程中如果管理不善，容易出现早衰、空秆、缺粒、倒伏等现象，这样就会严重影响到玉米品质和产量。如何防止这种现象发生，应着重做好“四防”。玉米生长的前期如何做到“促下控上”，中后期为授粉结实创造良好的生长环境，提高光合效率，延长根和叶的生理活性，达到粒重饱满高产的目的，应做好“六技巧”。     

浅谈互通立交连接部出入口设计

互通式立交端部设计是整个立交设计的重要部分,通过对端部出入口设计要点的分析研究,结合单、多车道出入口不同的设计要求,提出合理建议,以期更好的完善立交端部设计。     

南昌市道路绿化树种调查分析与建议

通过对南昌市道路主要绿化树种种类、使用频率及长势进行调查,并对存在的问题进行分析与探讨,同时根据南昌市的实际情况,提出了几点建议和措施。     

Tyrosine Ameliorates Some of the Clinical,Biochemical and Haematological Effects of Acute Stress Associated with Transportation of Desert Sheep

We studied some clinical, biochemical and haematological variables in Desert (Najdi) sheep acutely stressed in the course of individual road transportation, and the influence thereon of pretreatment with tyrosine. Transportation for 30 min resulted in variable but statistically insignificant increases in heart, pulse and respiratory rates. It also caused significant increases in the plasma concentration of cortisol (from 43.5 to 101.7 mmol/L) and glucose (from 3.1 to 4.5 mmol/L), and a decrease in that of magnesium (from 0.85 to 0.72 mmol/L). The endogenous thiocyanate level was unaffected. The transportation stress also decreased the haematocrit (PCV) and the number of lymphocytes, and increased the concentration of haemoglobin. Pretreatment of sheep with tyrosine at a dose of 100 mg/kg by the intravenous route significantly ameliorated the stress-induced clinical, biochemical and haematological changes. The treatment caused no overt adverse effects.     

塔克拉玛干沙漠公路沿线植被及特点

本文以塔克拉玛干浙江省公路为主线，调查由沙漠北缘至腹地自然概况，植物组成及分布特点，植被类型等，结果表明，塔克拉玛干沙漠公路沿线植物组成非常贫乏，仅１８种；生态学特性则以中生，耐盐的高位芽植物占主导地位；大多数植物以根蘖为主要繁殖形式；植被类型简单、隐域性盐化草甸植被占有一定的地位。