用蒸压法制备新型粉煤灰水泥的研究

以粉煤灰、石灰为主要原料，经混合料制备、成型、蒸压、低温焙烧、粉磨工艺制备的新型水泥既具有普通水泥的胶凝特性，又同时具有水化热低、后期强度高的特点，对过程工艺参数、物料配比对新型水泥的质量影响进行了研究，该工艺有望为粉煤灰在水泥行业的规模化利用提供技术支持。     

我国资源与环境信息系统建立与应用

资源与环境信息系统是研究人口、资源与环境的重要工具。本文论述了其定义和意义,说明其在我国发展的情况,以及应用上的特点,提出其建立与应用的广阔前景。     

云南剑川粗面斑岩-正长岩杂岩体的岩石学特征

分布在剑川县城西侧的一系列碱性浅成斑岩-深成岩体,不是彼此孤立而是一个具有成因联系的杂岩体.该杂岩体可分为四次岩浆侵入,其中第Ⅱ次剑川粗面斑岩并不是过去认为的粗面岩,而是一个超浅成侵入体,从中心到边部可分为两个岩相带,岩石以碱性系列为主,岩浆是深熔作用形成的.     

湖北省城镇化发展质量评价与空间关联性分析

城镇化发展质量是衡量一个国家或地区社会经济发展水平的重要指标。从人口、土地、社会、经济和城乡协调发展5个方面，构建了一套城镇化发展质量评价指标体系，采用熵值法和空间自相关分析法，对2009和2017年湖北省县域城镇化发展质量进行综合评价，并分析不同县域单元城镇化发展水平在空间上的关联特征。研究结果表明：（1）2009～2017年湖北省城镇化发展质量在整体上呈上升趋势，且各地区的提升速度较快；（2）城镇化发展质量呈现出显著的空间正相关，城镇化发展质量较低县域的集聚程度要高于较高地区；（3）低质量的县域主要位于西部地区，中部地区如宜昌市的集聚程度逐渐增强，高质量县域主要集中在武汉市辖区。通过该分析研究以期为湖北省推进高质量城镇化发展提供决策思考。     

"数字石羊河"建立及其在沙尘暴防治中的应用

由于上游超量用水,导致石羊河下游的民勤县绿洲无水可用,生态环境严重恶化,成为我国的第四大沙尘暴策源地.本文提出了建立"数字石羊河"的概念,认为石羊河流域要建立公平的用水机制,在技术上要建立"数字石羊河",最后对"数字石羊河"在沙尘暴防治中的应用作了分析.     

Incidence rates and risk factors for injury events in high school students in Lijin County, China

PROBLEM: Most investigations of injuries among Chinese populations are focused on urban or better developed areas, fewer on rural or poor areas. METHODS: From September 21 to 27, 2002, an epidemiological investigation of eight kinds of injury-related events was carried out among 1,944 students in 39 classes randomly sampled from middle schools in Lijin County, a rural area. The eight kinds of events were: (a) traffic accidents, (b) poisoning, (c) fall, (d) burn or scald, (e) blunt or sharp tools contact, (f) electrical contact, (g) animal or insect bites, and (h) non-fatal drowning. RESULTS: The total incidence rate of eight kinds of injuries in the previous year was 21.1%. The incidence rate among boys was 24.2%, while that among girls was 17.4%, which was significant (chi-square=13.4, P<0.05). The incidence rate among junior high school students was 23.1%, while that among senior high school students was 15.5%, which was also significant (chi-square=13.2, P<0.05). A case-control study of 410 students with at least one of eight kinds of injury events indicated that students' gender and their mothers' health status were related to their injuries. CONCLUSION: The injury incidence rate in a rural area was less than other results in urban or developed areas. Students' gender and mothers' health status were important factors associated with the occurrence of injury. IMPACT ON INDUSTRY: In order to improve the surroundings of the growing population of adolescents, some preventive measures should be put forward, especially to the high-risk students of injury.     

Investigation on road traffic safety of the mountain areas in southwest China based on Wulong County, Chongqing Municipality

OBJECTIVE: To study the present situation, characteristics, and main problems of the traffic safety in the mountain areas of Southwest China. METHODS: A study was done on the traffic status of Wulong County, Chongqing Municipality, by means of document review, field investigation, and inquiry. RESULTS: The traffic crashes and deaths in Wulong County were increasing since 1999. From 1997 to 2001, there occurred 126 severe and very severe traffic crashes resulting in 175 deaths and 411 serious injuries, which accounted for 9.4% of total crashes, 96.1% of total deaths, and 48.4% of total serious injuries, respectively. The severe and very severe traffic crashes were highest in 2000. One part for 83 km in length accounting for 3.0% of No. 319 National Highway was responsible for 54.5% of very severe traffic crashes, which closely related to conditions of the road itself and its environment and defective execution of traffic laws. CONCLUSIONS: Wulong County, one of the mountain counties in Southwest China, is now facing a complex and serious road traffic situation and serious traffic safety, with a high incidence of severe and very severe road traffic crashes. The crashes closely relate to imperfect road design, defective execution of traffic laws, imperfect management, and environmental factors.     

城市排水系统提质增效关键技术研究 ——以马鞍山市为例

长江中下游城市普遍存在排水系统提质增效问题,成为制约城市水环境长效改善的关键瓶颈.结合长江生态环境保护修复马鞍山驻点城市需求,围绕精准控源截污和雨天排放污染控制,以马鞍山市主要城市内河——慈湖河水系水质改善为案例,开展了4项关键技术研究:1)基于河流网格化水量水质监测的排污口溯源方法,结合反问题方法,确定慈湖河干流污染...     

水质监测中常见技术问题与对策

为确保水质监测工作的有效开展,指出了水质监测中存在的问题,包括样品采集、实验室环节、测试环节、仪器和试剂、数据处理、人员专业能力等方面,并提出了改进措施:重视样品采集,积极完成实验室准备工作,有效对样品展开分析,加强数据处理,加强对水质监测人员的培训.展望了水质监测的发展趋势,应与信息管理技术相结合,对数据进行综合性分...