杭州湾南岸滩涂沉积物中HCHs与DDTs污染特征分析

摘 要：目的 了解六六六（hexachlorocyclohexanes,HCHs）与滴滴涕(dichloro diphenyl trichloroethanes,DDTs)在杭州湾南岸滩涂沉积物中的污染现状。方法 于2018年4月，采集杭州湾南岸地区4个采样点不同深度（0~80 cm）滩涂沉积物，利用气相色谱-串联质谱法（gas chromatography tandem mass spectrometry, GC-MS/MS）测定了该区域中HCHs与DDTs的含量，对其分布规律进行分析，使用共识沉积物质量基准法对其生态学风险进行了评估。结果 所有样品中均检出，HCHs与DDTs含量分别为4.20~6.24 μg/kg与3.37~4.73 μg/kg，主要以β-HCH、δ-HCH以及DDE为主，其污染主要来源于历史性工业品，整体污染处于较低水平；20.3%的沉积物样品中DDEs含量以及28.1%的样品DDTs总量介于阈值效应浓度(threshold concentration, TECs) 和可能效应浓度(probable effect concentration, PECs)之间。结论 杭州湾南岸沉积物中HCHs与DDTs的污染处于较低水平，具有较小的生态学风险。     

山重水碧桃花源——杭州绿城·桃花源生态休闲居住区规划

杭州绿城·桃花源生态休闲居住区是一个集居住、游憩及生态环境于一体的低密度住宅园区。作者介绍了该项目的规划构思和规划内容,指出项目规划由风景园林为主多专业合作的优势,对发展中的城郊居住区规划具有参考价值。     

添加微量铝对TS-2合成及苯酚羟基化的影响

以硅溶胶为硅源合成分子筛TS 2时 ,在溶胶制备过程中添加微量的铝 ,可以降低模板剂氢氧化四丁基铵 (TBAOH)的用量 ,当TBAOH/SiO2 降低到 0 .1以下时 ,仍然合成了性能优良的TS 2 ,而且用于苯酚过氧化氢羟基化反应过程中催化活性也大大提高。所得催化剂用XRD ,IR ,ICP进行了表征     

杭州湾跨海大桥钢管桩的涂层防护

杭州湾跨海大桥采用钢管桩沉桩基础。钢管桩的腐蚀问题采用涂层加阴极保护的防护体系,其中涂层部分采用单层/双层/三层重防腐环氧粉末喷涂防护方案解决。介绍了三种涂层结构及其用途。     

杭州市城西地区洪水出路研究

杭州市城西地区地势低洼,上承山水,下受杭嘉湖平原河流水位顶托,为易受洪涝灾害地区。以抵挡2007年"罗莎"台风洪水为目标,根据城西地区水系分布、城市布局,初步提出了洪水外排、湿地调蓄、建圩挡水的排涝布局及10种洪水出路方案。对10个方案从水位、水量、工程投资、对周边地区影响、政策处理等方面进行比较,最终提出以建设西溪湿地至钱塘江的地下排水通道、西溪湿地内部调蓄、分区建圩的组合方案为推荐方案。经分析认为,推荐方案可有效减轻杭州市城西地区的洪涝问题。     

Call for papers The 34th Chinese Control Conference & SICE Annual Conference 2015

正The 34th Chinese Control Conference and SICE Annual Conference 2015(CCCSICE2015)is organized by the Technical Committee on Control Theory(TCCT)of Chinese Association of Automation(CAA)and the Society of Instrument and Control Engineers(SICE)of Japan,and locally organized by Hangzhou Dianzi University(HDU).     

杭州湾跨海大桥与宁波工业设计产业的发展

杭州湾跨海大桥的建成通车,使宁波到上海由原来的绕行杭州湾变成直达,宁波由一个交通末梢变成枢纽。大桥给宁波各个行业带来深远的影响,工业设计也不例外。近几年,宁波政府和企业都非常重视工业设计,并采取了许多积极措施。我们要充分利用大桥带来的积极因素,又好又快地发展宁波工业设计产业。     

浅谈色彩体系的规划对城市品牌形象建设的影响——以杭州市为例

色彩设计是品牌战略中一个重要的砝码,城市色彩设计体系的规划对城市文化氛围的营造和城市整体形象的提升有着至关重要的意义,它是在城市特有的地域历史文化的基础上建立起来的,在城市品牌形象的宣传推广中是一个十分重要的设计元素。文章以杭州市城市品牌的打造为落脚点,在讨论杭州市色彩设计体系规划的基础上进一步探讨色彩设计体系规划对城市品牌形象塑造的影响。     

Suitability evaluation of urban construction land based on geo-environmental factors of Hangzhou, China

Suitability evaluation of urban construction land based on geo-environmental factors is the process of determining the fitness of a given tract of land for construction. This process involves a consideration of the geomorphology, geology, engineering geology, geological hazards, and other geological factors and is the basis of urban construction land planning and management. With the support of Geographic Information Systems (GIS), grid analysis, and geo-spatial analysis techniques, four factor groups comprising nine separate subfactors of geo-environmental attributes were selected to be used in the evaluation of the suitability level for construction land in Hangzhou. This was based on K-means clustering and back-propagation (BP) neural network methods due to their advantages in fast computing, unique adaptive capacity, and self-organization. Simultaneously, the evaluation results based on K-means clustering and BP neural network were compared and analyzed, and the accuracy evaluation was set. The results showed that the geo-environmental suitability evaluation results of construction land based on K-means clustering and BP neural network were similar in terms of the distribution and scale of construction land suitability level. At the same time, the results of the two evaluation methods were consistent with the variability in suitability level, engineering geology, and hydrogeology of Hangzhou. The results also showed that the real advantage of the methods proposed in this paper lies in their capacity to streamline the mapping process and to ensure that the results are consistent throughout. The suitability level of the urban construction land based on the geo-environment in Hangzhou was divided into four construction sites: land for building super high-rise and high-rise buildings, land for building multistorey buildings, land for low-rise buildings, and nonbuilding land. The results of the suitability evaluation for each category will provide a scientific basis for decision-making in urban development in Hangzhou.     

80 t UHP DC EAF-LF-CC工艺生产Q390B低合金高强度钢的实践

杭钢用80 t UHP DC电弧炉-钢包炉(LF)-200 mm×200 mm连铸及700×1/650×3轧机轧制,生产直径75 mm的Q390B低合金高强度圆钢.LF精炼时控制(%)0.16～0.19C,1.35～1.52Mn,0.03～0.05V,≤0.025S,≤0.025P,喂CaSi线并全程吹氩,连铸采用长水口保护浇注.检验结果表明,钢材具有良好的表面质量、低倍组织,夹杂物≤2.0级,钢的σs 380～465 MPa,σb 545～625 MPa,δ 22.0%～28.5%,AK 98～210 J.