福建大樟溪流域综合规划的环境影响研究

从流域和区域对水资源需求及环境保护要求出发,提出了在大樟溪干流刘岐、岩前和莒口增设鱼道、取消船闸和航运的建议;从流域环境保护要求提出了主要水库的最小下泄流量;根据大樟溪流域人口、经济及土地资源的状况,提出了从泉州、莆田和福州等水资源受益区安置移民缓解土地资源紧张的模式来提高龙湘水库的调节库容,以提高流域及区域对水资源需求与调配能力,确保河道生态安全、生产生活用水安全等流域规划的新思路、新理念。     

调节剂对烷基水杨醛肟萃取铜铁的影响

烷基水杨醛肟虽然是一种高选择性的铜萃取剂，但单独使用时，萃取相易出现沉淀；反萃时，再生有机相出现乳化物，而且两相分离时间较长．将月桂醇、仲辛醇、壬基酚三种调节剂分别加入到萃取剂中，研究其对烷基水杨醛肟萃取及反萃行为的影响．结果表明，三种调节剂均可以解决上述问题，只是使萃取能力略有降低；壬基酚加入到烷基水杨醛肟中有助于提高铜铁分离系数，可达647．     

影响硼酸结晶形状的因素

从硼酸的结晶机理入手,探讨了影响硼酸结晶形状及大小的因素,在合理地控制操作条件的同时,加入合适的晶习改性剂,可以加大硼酸结晶体的粒状比例。     

应用摩擦改进剂提高燃料经济性

介绍了摩擦改进剂的类型及作用机理，比较了不同类型的摩擦改进剂。阐述了应用摩擦改进剂减少边界润滑和混合润滑状态下的摩擦损失，从而提高燃料经济性。     

Psychological impact of colorectal cancer screening.

This article examines the psychological impact of participating in sigmoidoscopy screening for colorectal cancer prevention. The 1st study examined psychological well-being at 3 months, in relation to screening outcome, in 4,153 individuals. The 2nd study used longitudinal data to examine changes in psychological functioning from before to after screening in relation both to screening outcome and baseline indicators of vulnerability. There were few psychological differences between those who had received negative results or had polyps detected. These findings were confirmed in the longitudinal study, which also found no evidence for vulnerability to adverse effects among those who were initially most anxious or who perceived their risk of cancer to be higher. The longitudinal data suggested that screening might produce transient positive effects. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Economic Model to Optimize Underground Utility Protection

The need for better protecting our vital infrastructure from being damaged or destroyed has received increased attention since the terrorist attacks on September 11, 2001. The tragedy of having thousands of innocent people die before the eyes of an entire nation awakened people to the reality of “managed” attacks of unthinkable magnitudes. However, tragedies of a smaller scale are a daily occurrence but accepted as “collateral damage” of work in an unsafe environment. This paper presents a cost-benefit analysis to address the question of how much money should be spent in protecting underground utilities from damage. During the study of an actual incident it was found that the total costs of such accidents are vastly underreported because only costs for emergency responses and repair are tallied up. This paper makes the case that a comprehensive approach for assessing the total economic impact of such incidents on the public, business, and government is the critical stepping stone to a mathematical optimization of expenditure for damage prevention. In addition, the reader will quickly realize that the use of the presented optimization model provides theoretical underpinning for the engineering profession in its effort to better protect our critical infrastructure from terrorist attacks.     

Correlation between quasi-static and dynamic crack resistance curves

The correlation between the crack resistance measured from dynamic and quasi-static J-R tests has been investigated based on test data from instrumented Charpy impact tests and quasi-static single edge notched bend (SENB) J-R tests.The method originally proposed by Aurich et al. [Analyse und Weiterentwicklung Bruchmechanischer versagenskonzepte--Lokales Risswachstum, Ermittlung des Risswiderstandsverhaltens aus der Kerbslagarbeit. BAM Forschungsbericht 192, Berlin 1993, ISBN 3-89429-329-2], to develop a correlation coefficient between the net fracture resistance of Charpy V-notch (ISO) and quasi-static compact tension tests, was extended to establish correlations between so-called ductile-brittle transition fracture resistance curves obtained from instrumented Charpy V-notched (ISO) and fatigue precracked impact tests and quasi-static SENB J-R fracture resistance tests.The correlation between the dynamic and quasi-static crack resistance with regard to practical application to fracture assessments appears to be reasonably consistent, bearing in mind the inherent scatter in crack resistance data in general. The findings of the present research project from testing of ship grade NVE 36 and pressure vessel steel to ASTM A516 Gr. 70 as well as two weldments in the NVE 36 steel, are in excellent agreement with the results of the research conducted by Aurich et al. [Analyse und Weiterentwicklung Bruchmechanischer versagenskonzepte--Lokales Risswachstum, Ermittlung des Risswiderstandsverhaltens aus der Kerbslagarbeit. BAM Forschungsbericht 192, Berlin 1993, ISBN 3-89429-329-2] for structural and pressure vessel steels to the German DIN standard steels including St 52-3, StE 355 and StE 460.     

咪唑封端扩链脲改性环氧树脂E-51/酸酐MTHPA体系性能研究

以端羟基聚环氧丙烷1000，甲苯二异氰酸酯（TDI），2－甲基咪唑为原料，合成了扩链脲TI，利用DSC，动态热机械分析仪DMA，冲击试验机及扫描电镜（SEM）等手段对TI改性的环氧树脂E－51／甲基四氢化邻苯二甲酸酐（MTHPA）固化体系的反应活性，动态力学行为，冲击性能，断裂面形态结构进行了系统研究，结果表明，改性后的E－51／MTHPA体系反应活性明显提高，固化反应峰顶温度较未改性体系降低160℃－200℃，固化反应的表观活化能由未改性体系的160．3kJ/mol降至63kJ/mol-87kJ/mol，同时与未改性体系相比，经过改性的环氧树脂固化体系冲击强度有较大的提高，在TI含量为5％时体系的玻璃化转变温度Ts达到最高，各改性体系冲击断面呈韧性断裂。     

鸡冠咀金矿废水污染预测及控制标准的探讨

本文以鸡冠咀金矿废水污染为例,论述了复杂水环境的预测模式选择和参数确定;并对水质标准进行了探讨;提出了鸡冠咀金矿废水排放的控制标准。