室内培养底栖端足类日本大螯蜚饵料研究

本文在实验条件下探讨了５种饵料对海洋底栖端足类日本大螯蜚的培养效果。实验指标为存活率，生长速度，日增长率和发育状况。结果表明，青岛大扁藻与新月菱形藻１：１混合液的培养效果最佳，合成饲料是较好的补充饵料，螺旋藻粉不宜作为日本大螯蜚的培养饵料。动物性饵料培养效果不如植物性饵料，但对日本大螯蜚的早期快速成长具有一定的促进作用。     

方轧件在椭圆孔型中轧制温度场的三维有限元分析

应用MARC/autoforge有限元软件对方轧件在椭圆孔型中的轧制温度场进行了热力耦合模拟.研究了模拟过程中的传热边界条件,分析了轧制前和轧制过程中轧件中温度场的分布和变化规律.模拟计算结果和实验结果的比较说明二者基本是相符的.     

葫芦岛市可持续发展能力评价

为实现葫芦岛市社会、经济和环境的可持续发展，将可持续发展变成现实的可操作的管理模式．运用层次分析方法对葫芦岛可持续发展能力进行研究，评价葫芦岛市现有可持续发展水平，分析影响可持续发展的原因并提出相应的解决方法。     

地震灾害与地震预报——写在邢台地震40周年之际

本文分析了我国的地震灾害，阐述了近代地震灾害的特点和发展趋势，指出地震预报既是强烈的社会需求，也是全球性的科学难题，最后较为全面地介绍了我国地震预报的主要进展。     

On-line optical determination of floc size of Fe(Ⅲ) coagulants

This study investigated the floc aggregation, average floc size, floc size variance and floc growth velocity when ferric chloride （FeCl3） and polyferric chloride （PFC） were used to treat the simulated water samples. The factors including coagulant dose, ionic strength and solution pH, which affect the floc aggregation, were studied. Experiments were carried out in a bench-scale reactor using photometric dispersion analyzer （ PDA）. Results showed that there were great differences between the floc aggregation of PFC and FeCl3. The average floc size and fioc growth velocity of PFC were much larger than those of FeCl3. Compared with FeCl3, PFC gave a better coagulation performance in wider range of pH, dosage and ionic strength. It was also found that the coagulation efficiency of PFC did not depend on average floc size but on floc growth velocity.     

Simulating dairy liquid waste management options as a nitrogen source for crops

Large scale dairy operations are common. In many cases the manure is deposited on a paved surface and then removed with a flushing system, after which the solids are separated, the liquid stored in ponds, and eventually the liquid applied on adjacent crop land. Management of liquid manure to maximize the fertilizer value and minimize water quality degradation requires knowledge of the interactive effects of mineralization of organic N (ON) to NH₄⁺, crop uptake of mineral N, and leaching of NO₃⁻ on a temporal basis. The purpose of the research was to use the ENVIRO-GRO model to simulate how the amount of applied N, timing of N application, ON mineralization rates, chemical form of N applied, and irrigation uniformity affected (1) yields of corn (Zea mays) in summer and a forage grass in winter in a Mediterranean climate and (2) the amount of NO₃⁻ leached below the root zone. This management practice is typical for dairies in the San Joaquin Valley of California. The simulations were conducted for a 10-year period. Steady state conditions, whereby an equivalent amount of N applied in the organic form will be mineralized in a given year, are achieved more rapidly for materials with high mineralization rates. Both timing and total quantity of N application are important in affecting crop yield and potential N leaching. Major conclusions from the simulations are as follows. Frequent low applications are preferred to less frequent higher applications. Increasing the amount of N application increased both the crop yield and the amount of NO₃⁻ leached. Increasing irrigation uniformity increased crop yields but had variable effects on the amount of NO₃⁻ leached. A winter forage crop following a summer corn crop effectively reduced the leaching of residual soil N following the corn crop.     

石化企业的节水与废水资源化问题

讨论了石化企业如何充分利用水资源，不断提高节水意识。并结合石化企业的具体情况，用系统工程的分析方法，深入研究节水和水资源化的方法和途径。对这些问题，提出一些看法供大家参考。     

复合催化氧化技术对油气田压裂返排液的处理研究

酸化压裂作业废水是石油天然气生产过程中的主要污染源,它的污染成份复杂,有害物质浓度高,特别是含有胍胶和表面活性剂等高分子物质,具有高COD、高稳定度、高粘度的特点.本文通过对压裂液的来源、水质特征、治理现状等常用方法的分析,确定了物理化学脱稳,过滤、O3/H2O2复合催化氧化、深度氧化的达标治理工艺路线.经过处理后的压裂液澄清透明,达到国家二级排放标准(GB8978-96).     

建筑行业环境保护与绿色施工

本文对建筑施工造成的环境污染及其危害性进行了分析,提出切实可行的文明施工、防止污染、新科技环保等综合措施,坚持可持续发展的科学发展观,发展文明施工、绿色施工.     

水体中苯及其衍生物降解途径研究进展

介绍了苯及其衍生物对水环境所造成的污染和危害,并对水体中该类污染物降解技术研究进展进行了综述.着重介绍了光化学及光催化技术、生物降解和超声波降解等技术在该领域的有关研究.