水溶液中非离子氨百分比的计算

根据平衡常数与温度的关系，求出非离子氨百分比α（ｐＨ，ｔ）的表达式，运用公式计算可以提高数据的准确性和批量计算的工作效率。     

酸雨对种子萌发影响的实验研究

采用ＰＨ值２．５、３．０、３．５、４．５的酸雨处理小麦种子，观察种子的萌发率、平均萌发天数和萌发势。结果表明：酸雨对种子的萌发率和平均萌发无显著影响，但对种子萌发势有显著影响。     

超声波探伤技术中的波高百分比法的认识

对波高百分比探伤方法的认识,本文将该方法的基本理论、标准规定波幅关系以及在超声探伤中该方法的技术做一概略介绍。     

Screening of factors influencing Cu(II) extraction by soybean oil-based organic solvents using fractional factorial design

This study aimed to identify the significant factors that give large effects on the efficiency of Cu(II) extraction from aqueous solutions by soybean oil-based organic solvents using fractional factorial design. Six factors (mixing time (t), di-2-ethylhexylphosphoric acid concentration ([D2EHPA]), organic to aqueous phase ratio (O:A), sodium sulfate concentration ([Na(2)SO(4)]), equilibrium pH (pH(eq)) and tributylphosphate concentration ([TBP])) affecting the percentage extraction (%E) of Cu(II) were investigated. A 2(6-1) fractional factorial design was applied and the results were analyzed statistically. The results show that only [D2EHPA], pH(eq) and their second-order interaction ([D2EHPA] × pH(eq)) influenced the %E significantly. Regression models for %E were developed and the adequacy of the reduced model was examined. The results of this study indicate that fractional factorial design is a useful tool for screening a large number of variables and reducing the number of experiments.     

江苏省南通市区酸雨组分分析

简要介绍了2001年-2007年南通市区降水中硫酸根占比44．21％,硝酸根占比15．74％,氟离子占比7．89％;铵离子占比12．26％,钙离子占比11．51%,钠离子占比3．85％;多年阴、阳离子平均占比呈双曲线对称管道,1～4月管道中酸雨频率由高向低,5～9月管道中酸雨频率波动不大,10～12月管道中酸雨频率由低向高;同时酸雨频率由2001年升高到2007年的程度,与阳离子占比下降6．9个百分点,阴离子占比上升6．9个百分点相关。     

上海市中心城区地表温度与绿地覆盖率相关性研究

利用卫星遥感提取的外环线以内绿地信息和由热红外波段资料反演的地表温度。对绿地覆盖率和中心城区地表温度进行相关分析。结果表明：在上海市外环线以内的大范围内。在有损估计的条件下。地表温度(T）和绿地覆盖率(S)之间满足线性关系；T=33.2132-4.6915S(r^2=1.000),即对整个外环线范围地区。绿地覆盖率每增加1％。地表平均温度将下降0．047℃；绿地对热岛效应的减缓作用。在斑块水平上体现明显，在绿地斑块水平上，地表温度(T)和绿地覆盖率(S)之间满足非线性关系：T=32.733 0.0121S-0.0011S^2 0.0000074S^2 (r^2=0.985)。用延安中路绿地作为检验表明,绿地建成后,地表平均温度降低了0．87～1．29℃。     

材料性能试验总延伸率的可比性

金属材料的总延伸率δ是很重要的性能参数.但在单向拉伸试验中,由于试样原始标距不同,所获得的总延我早率也不同.此文讨论了不同原始标距时,总延伸率δ的可比性问题,推导出了理论换算公式,并以实验结果加以验证.     

燃煤烟气脱硫石膏在新疆盐碱土壤改良中的应用研究

以燃煤烟气脱硫石膏作为化学改良剂,在新疆克拉玛依地区进行碱化土壤改良,土壤改良后种植新疆杨（Populus bolleana Lauche）、白榆（Ulmus pumila L.）、沙棘（Hippohgae rhamnoides L）。分析了烟气脱硫石膏对盐碱地土壤理化性质和树木生长状况的影响。结果表明：处理区土壤的pH值和全盐量比对照区有明显降低,处理区的原始碱化度越高,改良后碱化度的下降幅度越大,而且表层土壤中碱化度的下降最为明显,从29.9%下降到1.43%。改良后树木的平均成活率为71%,比对照区树木的成活率高41%,用燃煤烟气脱硫石膏改良新疆克拉玛依地区碱化土壤种植树木具有极大的推广应用价值。     

重庆市污染源结构对大气SO_2浓度贡献的数值分析

运用三维欧拉传输、转换、迁移模式对重庆城区各种大气污染源对大气ＳＯ２浓度的贡献数值进行模拟，分析重庆城区ＳＯ２污染形成的原因。结果表明，民用源和低矮工业源对地面ＳＯ２污染浓度贡献最大，而中高架源则主要影响高层大气，是高空大气污染及酸雨形成的重要原因。     

The use of virtual environments for percentage view analysis

It is recognised that Visual Impact Assessment (VIA), unlike many other aspects of Environmental Impact Assessments (EIA), relies less upon measurement than upon experience and judgement. Hence, it is necessary for a more structured and consistent approach towards VIA, reducing the amount of bias and subjectivity. For proposed developments, there are very few quantitative techniques for the evaluation of visibility, and these existing methods can be highly inaccurate and time consuming. Percentage view changes are one of the few quantitative techniques, and the use of computer technology can reduce the inaccuracy and the time spent evaluating the visibility of either existing or proposed developments. For over 10 years, research work undertaken by the authors at the University of Nottingham has employed Computer Graphics (CG) and Virtual Reality (VR) in civilian and industrial contexts for environmental planning, design visualisation, accident reconstruction, risk analysis, data visualisation and training simulators. This paper describes a method to quantitatively assess the visual impact of proposed developments on the landscape using CG techniques. This method allows the determination of accurate percentage view changes with the use of a computer-generated model of the environment and the application of specialist software that has been developed at the University of Nottingham. The principles are easy to understand and therefore planners, authorisation agencies and members of the public can use and understand the results. A case study is shown to demonstrate the application and the capabilities of the technology.