覆冰输电塔-线体系风致动力响应分析

依据流体诱发振动原理,结合已有覆冰计算模型,考虑降雨的分类,模拟了输电塔-线体系不同高度导线的覆冰和风荷载。以东北地区某输电塔为例,对覆冰输电塔-线体系在稳定风速激励下的动力响应进行分析,并与不考虑塔线耦联的导线舞动分析结果及覆冰塔线拟静力的分析结果进行对比,对塔位移、输电线位移、钢材应力进行了分析。研究结果表明:塔-线耦联体系对覆冰导线风振有很大影响,覆冰输电塔抗风设计安全度需要进一步提高。     

再论灾害研究的理论与实践

本文在作者１９９１年发表的“研究的现状与实践”一文基础上，全面分析了当前国外灾害理论研究的进展，对灾害理论研究中的２灾因子论，孕灾环境论，承灾体论进行了评述，并系统地阐述了区域灾害系统论的主要内容，即在综合分析组成区域灾害系统的致灾因子，孕灾环境，承灾体的基础上，通过对致灾因子的风险性评估，孕灾环境稳定性的分析，承灾体易损性的评价，揭示区域致灾与成灾过程中灾 情纬傻亩ρЩ?     

利用下水管网系统净化城市污水的中试研究

采用充纯氧及固定化细胞技术在２７５．５ｍ市政下水管网系统中进行了日处理１５００ｍ＾３污水的中试。对单纯充氧、充氧加固定化细胞二种工艺及不同 氧量刊物了比较研究。结果表明,在加固定化细胞条件下,充纯氧（Ｖ（Ｏ２）：Ｖ（Ｈ２Ｏ）＝０．０７８：１）可使流过此段管道的污水的污染物去除６５％以上,基本达到国家污水综合排放二级标准。     

松嫩盆地资源环境信息系统空间数据库的设计与开发

文章介绍了松嫩盆地资源环境信息系统空间数据库的设计思路,总体目标、构成及功能以及系统建立的关键技术。该系统的建立,使得对松嫩盆地资源开发管理和相关信息的查询、检索更方便,同时对松嫩盆地资源合理开发利用和管理决策提供了科学依据。     

思茅市三家村农户庭园系统的能流和经济流研究

通过对三家村 6种农户庭园模式进行能流和经济流的系统研究 ,得出三家村 6种农户庭园系统的能量投入为 (98.4 8～ 174 .4 5 )× 10 10 J·hm-2 ,能量产出为 (10 1.6 6～ 15 8.5 2 )× 10 10 J·hm-2 ,能量产投比为(0 .88～ 1.4 1)∶1,并且以种植业为主的农户庭园 (模式Ⅰ、Ⅱ )的能量产投比高于以养殖业和副业为主的农户庭园系统 (模式Ⅵ、Ⅶ、Ⅸ ) ;三家村 6种农户庭园模式的经济产投比为 (1.0 0～ 1.35 )∶1,其高低次序是Ⅵ >Ⅶ >Ⅰ >Ⅱ >Ⅴ >Ⅸ ,6种农户庭园模式的经济产出为 2 32 7.9～ 980 3.4元。因此 ,三家村农户庭园系统是一个能量和经济的高投入高产出的人工生态系统     

GIS在城市给水排水中的应用

阐述了GIS在城市给水排水领域的应用和发展趋势，包括水资源管理与分析、给水排水管网设计与管理、城市污水处理厂设计与管理、管网应急预警系统分析、水质污染状况和趋势分析等，并以大庆市给水排水管网信息管理系统实例，证明GIS可以及时准确完整的提供所需信息，更好的为市政管理者辅助决策提供依据。     

Multi-factor principle for electrolyte additive molecule design for facilitating the development of electrolyte chemistry

When I read the paper"Electrolytes enriched by potassium perfluorinated sulfonates for lithium metal batteries"from Prof. Jianmin Ma's group, which was published in Science Bulletin (doi.org/10.1016/j.scib.2020.09.018), I felt excited as presented a multi-factor principle for applying potassium perfluorinated sulfonates to suppress the dendrite growth and protect the cathode from the viewpoint of electrolyte additives. The effects of these additives are revealed through experimental results, molecular dynamics simulations and first-principle calculations. Specifically, it involves the influence of additives on Li+ solvation structure, solid electrolyte interphase (SEI), Li growth and nucleation. Following the guidance of the multi-factor principle, every part of the additive molecule should be utilized to regulate electrolytes. This multi-factor principle for electrolyte additive molecule design (EAMD) offers a unique insight on understanding the electrochemical behavior of ion-type electrolyte additives on both the Li metal anode and high-voltage cathode. In these regards, I would be delighted to write a highlight for this innovative work and, hopefully, it may raise more interest in the areas of electrolyte additives.     

Prenatal diagnosis of NADH:ubiquinone oxidoreductase deficiency

NADH:ubiquinone oxidoreductase (complex I of the mitochondrial respiratory chain) deficiency is a severe disorder with an often early fatal outcome. Prenatal diagnosis for complex I defects currently relies mainly on biochemical assays of complex I in fetal tissues such as chorionic villi (CV), and is only in a minority of cases possible by means of mutational analysis of nuclear-encoded genes of complex I. We report on our experience to date with prenatal diagnosis in pregnancies at risk for complex I deficiency. We measured complex I activity in native CV and/or cultured CV in 23 pregnancies in 15 families. In accordance with the results of the investigations in CV, 15 children were born clinically unaffected. Two prenatally diagnosed unaffected fetuses and two prenatally diagnosed affected fetuses were lost prematurely with spontaneous or provoked abortions, respectively. Two affected children were born (prenatally found to be affected). In two pregnancies a discrepancy between native and cultured cells was found. We conclude that prenatal diagnosis for complex I deficiency can be reliably performed. Pitfalls were encountered in using cultured CV as a result of maternal cell contamination (MCC). Future research on pathogenic nuclear mutations underlying complex I deficiency will extend the possibilities for prenatal diagnosis at the molecular level. Copyright © 2001 John Wiley & Sons, Ltd.     

典型农牧交错带山水林田湖草生态保护修复——以内蒙古岱海流域为例

典型的农牧交错带——岱海流域是我国“两屏三带”生态安全战略格局中北方防沙带的重要组成部分,也是京津冀地区生态屏障的重要组成部分,其生态环境保护意义重大。针对岱海流域独特的地理特征和生境状况,围绕着水量减小和生态退化两大核心问题,梳理了其水量、水质、水生态等方面的优先问题清单;以保障岱海流域生态安全为核心目标,按照优化生态空间管控与分区分类精准修复相结合的思路,构建了“一湖三区”的国土空间管控体系和“两增、两减、三平衡”的山水林田湖草生态保护修复工程体系,以期增强岱海流域生态服务功能,促进农牧交错带生态脆弱区域经济社会发展。     

福建省林权改革环境影响农户调查研究—以三明市和永安市为例

福建是全国第一个开展林权制度改革的省份。本文通过在福建省三明市和永安市实地调研的基础上,探讨福建省森林资源经营的改变对环境的影响。研究发现,林区的绝大部分林农对林权改革持满意的态度,认为林权改革前后对环境的影响有变化。数据分析显示,林改后,对林业的投入对于森林旅游的影响成正比;家庭年均收入对空气质量的影响成负相关。研究建议,继续加大对林业的投入,科学编制森林经营规划和经营方案,促进生态环境改善和林农的增收。