模拟月壤在不同堆积状态下的紧实度研究

月球表面覆盖着一层细颗粒粉末状的松散月壤,这必将对月球探测车辆的行驶性能带来影响。研究用于月面力学试验的模拟月壤紧实度,对保证月球探测车辆的正常工作具有重要意义。圆锥指数和容重都可以表征模拟月壤的紧实度,通过不同的分析方法对模拟月壤进行整备,从而得出模拟月壤在不同堆积状态下圆锥指数和容重的变化规律,并且将其结果与真实月壤进行比较,其结果为月球车内场试验提供了标准和依据。     

材料力学教学方法探讨

文章针对二本院校《材料力学》课程教学过程中出现的问题,总结出了提高教学效果的教学方法,即合理删减教学内容、理论结合实际调动学生的积极性、运用比较学习方法、强调数学基本功。     

冲击碾压补强施工工艺在二广高速公路高液限土路基填筑中的应用

结合二广高速公路的高液性土路基填筑施工，通过现场冲击碾压补强实验，对冲击碾压补强施工前后的试验路段进行了沉降量、压实度以及CDP的检测，试验数据表明经过冲击碾压补强后的高液性土是可以用于高速公路93区的路基填筑，且有利于降低工程建设成本。     

面向电力的《工程力学》精品课程建设介绍

本文基于对当前我国《工程力学》内容与体系的现状、国内院校教改的经验及本校的教改体会,结合电类高校专业的特点,探讨了工程力学课程的改革方向,并构造了《工程力学》课程的内容体系框架。     

Landcare and Livelihoods: The Promotion and Adoption of Conservation Farming Systems in the Philippine Uplands

Slow adoption of conservation farming systems in the Philippine uplands is a major problem. To address this, the landcare approach, based on community landcare groups, is being piloted in several locations. The results of a study to evaluate the impact of the Landcare Program in Barangay Ned in Southern Mindanao are presented. The sustainable rural livelihoods approach was used as a framework for the evaluation. The study focused on two impacts, the adoption of conservation practices and the formation and development of landcare groups, drawing on four data sources—project reports, key informants, a questionnaire survey, and case studies of landcare groups. The Ned Landcare Program has been associated with rapid adoption of conservation farming practices and the rapid formation of landcare groups linked in an association. The main effect of the Program was to enhance human capital through practical, farmer-led training and extension, enabling farmers to incorporate soil conservation and agroforestry technologies in their farming systems, with desirable outcomes for livelihood security and environmental sustainability. The social capital formed, especially through the landcare association, was crucial to these outcomes. Ongoing partnerships with adequately resourced facilitating agencies were required to maintain the Landcare Program in the long term.     

东北地区土壤活性有机碳对水热梯度变化的反映S152.4+2S153.6

基于样区20年气象资料统计结果和2006年土壤有机碳实测值,分析了东北样区内土壤活性有机碳各组分的空间分布格局及其与年均温(t)、降雨量(p)、有效积温和p/t(降雨量/年均温)之间的关系。结果表明:样区内土壤活性有机碳各组分沿纬度呈现出南低北高的分布趋势;活性有机碳各组分与土壤有机之间具有显著的正相关性;活性有机碳组分之间具有较强的相关性;活性有机碳各组分与气候因素之间存在良好的相关性。活性有机碳各组分与年均温之间的相关性大于活性有机碳各组分与降雨量之间的相关性。     

工程力学课程探究式教学法研究与实践

工程力学是工科类专业一门重要的技术基础课程,是学生学习其他相关后续课程的必要基础。通过阐述探究式教学方法的内涵与特点,并以"点的合成运动"的教学为例,介绍了探究式教学法的实施过程及实施原则。实践证明,探究式教学法是提高教学质量,培养创新型人才的有效途径。     

大面积垃圾填埋区深基坑工程施工与设计特点

青岛北客站交通枢纽选址为青岛老填海垃圾填埋场,对老垃圾填埋场占地从新利用,进行地下工程建设,国内尚属首例。其基坑开挖部分包括2~3m的建筑垃圾和2~12m的生活垃圾,在垃圾土环境中进行基坑开挖,其设计和施工应考虑垃圾土的影响。     

高速公路不良土质路基填料施工研究——以洞新高速公路为例

本文作者通过洞新高速公路第三合同段的不良土质路基填料的研究,结合实际情况,从质量与效益综合考虑,采取有效措施,解决此类不良土质在用于路基施工时难以压实、不能满足强度要求的难题。