大型会议展览中心的若干设计问题──厦门国际会议展览中心方案设计心得

１９９７年我们有幸参加了厦门国际会议展览中心的设计竞赛。该项赛事包括：国际会议展览中心区城市设计和会议展览中心个体设计两部分。本文重点就个体设计中的几个问题，参照近几年国际上几个新落成的大型会议展览中心进行探讨，以期对今后的设计实践提供一些有益的参考。一、概况１．厦门国际会议展览中心为了加强大陆与台湾的经贸往来，促进祖国统一，迎接新世纪的到来。厦门市政府拟在厦门市本岛东北部分区的东南隅，与小金门隔海相望的前埔区，开发一片８６．７公顷的用地。其中厦门国际会议展览中心将成为该区的龙头项目（图１）。２…     

新桥硫铁矿一期坑采接替延伸工程开工建设

铜陵化学工业集团有限公司新桥硫铁矿一期坑采 6 0万ｔ/ａ硫铁矿工程的接替延伸工程于 7月 8日正式开工建设。该工程总投资 80 0 0万元 ,预计可采工业储量2 10 0万ｔ ,按年采 6 0万ｔ规模计算 ,服务年限 35年左右。该工程采用主副井原位延伸法 ,将原一期坑采的 - 2 30ｍ中段分别下延至 - 2 70ｍ、 -330ｍ、- 330ｍ三个中段 ,基建期预计为两年半。此项工程的设计方案于 1998年 11月 30日通过专家审查 ,今年 2月对其中的部分工程进行了招标 ,安徽省中煤三建第三十工程处中标承建其中的主井井筒掘、砌等工程。该项工程的开工建设将为新桥矿调整…     

Hi-tech Researches Speed up Scientific and Technological Innovations of CNOOC

The scientific and technological development of CNOOC Limited entered a new stage during the Tenth Five-Year Plan period. High-tech researches in the company have catalyzed the technological innovation of the offshore petroleum industry. By undertaking 11 key projects concerning key technologies for exploration and development of giant Bohai oil field under China＇s National 863 Program, 24 sub-projects of CNOOC＇s projects matching with China＇s National 863 Program, and 10 sub-projects of National Key S ＆ T Special Projects through cooperation with Chinese Academy of Sciences, the company developed 10 technology series with intellectual property rights.     

Chinese Oil Industry Faces New Challenges

Chinese petrochemical companies should gird for new challenges in three years, triggered by cost-competitive products flooding in from overseas, especially the Middle East countries. This advice was highlighted by company executives and association leaders during a discussion on the sidelines of a petrochemical conference organized by the China Petroleum and Chemical Industry Association in early April.[第一段]     

固溶及高温时效对Al-0.2Sc-0.04Zr、Al-0.15Sc-0.07Zr、Al-0.1Sc-0.05Zr合金力学性能的影响

通过硬度测试、电导率测定、金相显微镜观察等方法,确定合金的固溶工艺为600℃×24h水淬。经过高温时效处理后发现Al-0.2Sc-0.04Zr、Al-0.15Sc-0.07Zr、Al-0.1Sc-0.05Zr三组合金在300℃时时效465min后强化效果最佳。通过对比高温时效处理后不同Sc-Zr含量的Al-Sc-Zr合金的力学性能发现:Sc的添加,可以有效的增加合金的强度,在一定范围内,Sc含量越多,强度提升越明显。微量Zr元素能够有效抑制初生Al3Sc沉淀粒子的形成,从而使合金延伸率上升。综合结果表明,时效处理后Al-0.2Sc-0.04Zr的力学性能较好,其抗拉强度、屈服强度、延伸率分别为229.626MPa、97.707MPa、11.8%。     

突发疫情下健康防疫住宅小区出入口设计思考

2020年春节,突如其来的新冠疫情席卷神州大地.举国上下齐心协力直面疫情,并取得重大胜利.新冠病毒的特殊性以及国外疫情持续蔓延,导致国内进入"内防扩散,外防输入"常态期,社区成为防疫的主战场.基于多年住宅小区设计经验,在社区防疫的大背景下,研究健康防疫住宅小区的四重结构体系,并根据现有小区大门在特殊期、常态期的管理模式,描绘出小区大门的功能与结构,并形成标准化模块,可为后疫情时期住宅小区出入口设计提供参考.     

Preparation of an adhesive in emulsion for maxillofacial prosthetic

Maxillofacial prostheses is a dental medicine specialty aimed at restoring anatomical facial defects caused by cancer, trauma or congenital malformations through an artificial device, which is commonly attached to the skin with the help of an adhesive. The purpose of our research was to develop a pressure-sensitive adhesive (PSA) based on acrylic monomers, characterizing and determining its drying kinetics, that is to say the time it takes to lose 50 to 90% of its moisture. The adhesive synthesis was realized by means of emulsion polymerization; the composition of formulations was: (AA-MMA-EA) and (AA-MMA-2EHA) with different molar ratios. The formulation based on (AA-MMA-2EHA) with 50 w% of solids, presented good adhesive properties such as tack, bond strength, and short drying time. We propose this formulation as a PSA, because it offers an alternative for systemically compromised patients, by less irritation compared to organic solvent-based adhesives.     

Changes in soil sealing in Guadalajara (Spain): cartography with LANDSAT images

The great urban and industrial development of the towns surrounding Madrid has caused an irreversible and rapid soil loss. In this paper, soil sealed evolution in Guadalajara province during the past 15 years, mainly in the capital, industrial district and small municipalities near Madrid, has been studied. This province has experimented a sharp reduction of the most fertile soils, located on the Henares valley, due to the action of new models of local and regional development. The main goal of this paper is the mapping of the covered soils in a pilot area of Spain. Supervised classification of Landsat images from 1989 to 2002 has been carried out. Geo-referred image analysis allows us to detect precisely the amount of covered soils and where this phenomenon has taken place.     

Assessment of olive cake as soil amendment for the controlled release of triazine herbicides

Organic matter-rich agricultural by-products are being produced in huge quantities and can be applied to soil as a disposal strategy. The application of two different rates (2 and 8% w/w) of olive cake to a Mediterranean calcareous soil resulted in an increased sorption of four triazine herbicides, which was higher for the more hydrophobic compounds (terbuthylazine and prometryn) and lower for the more polar ones (simazine and cyanazine). However, when the sorption coefficients were normalised to the total soil organic carbon (K(oc)), the results did not significantly differ between simazine and cyanazine which is an indication that the olive cake did not exert different sorption capacity for both compounds. On the contrary, K(oc) values for terbuthylazine and prometryn increased in the amended soils. Our results from experiments using mixtures of several pesticides suggest that competition for sorption sites resulted in a decrease of herbicide sorption. Desorption was hysteretical both for the amended and unamended soils, but the addition of olive cake at the highest dose diminished desorption of most of the herbicides. In conclusion, the addition of olive cake behaves as a promising method for reducing the risk of groundwater pollution by pesticides.