南极菌Pseudoalteromonas sp．S-15-13产胞外多糖的研究及其分子鉴定

本文对影响南极细菌S-15-13生长和胞外多糖产量的主要环境因子进行了研究,同时采用16S rDNA序列分析及系统发育分析方法对其进行了分子鉴定。结果表明：菌株S-15-13最佳产糖条件为：培养时间,56h；培养温度,8℃；碳源,1．0%葡萄糖；NaCl浓度,3．0%；pH,6．0-7．0。16S rDNA序列分析和系统发育分析表明,菌株S-15-13属于假交替单胞菌属(Pseudoaltero- monas)。     

Traction image method for irregular free surface boundaries in finite difference seismic wave simulation

In this study, we propose a new numerical method, named as Traction Image method, to accurately and efficiently implement the traction-free boundary conditions in finite difference simulation in the presence of surface topography. In this algorithm, the computational domain is discretized by boundary-conforming grids, in which the irregular surface is transformed into a 'flat' surface in computational space. Thus, the artefact of staircase approximation to arbitrarily irregular surface can be avoided. Such boundary-conforming gridding is equivalent to a curvilinear coordinate system, in which the first-order partial differential velocity-stress equations are numerically updated by an optimized high-order non-staggered finite difference scheme, that is, DRP/opt MacCormack scheme. To satisfy the free surface boundary conditions, we extend the Stress Image method for planar surface to Traction Image method for arbitrarily irregular surface by antisymmetrically setting the values of normal traction on the grid points above the free surface. This Traction Image method can be efficiently implemented. To validate this new method, we perform numerical tests to several complex models by comparing our results with those computed by other independent accurate methods. Although some of the testing examples have extremely sloped topography, all tested results show an excellent agreement between our results and those from the reference solutions, confirming the validity of our method for modelling seismic waves in the heterogeneous media with arbitrary shape topography. Numerical tests also demonstrate the efficiency of this method. We find about 10 grid points per shortest wavelength is enough to maintain the global accuracy of the simulation. Although the current study is for 2-D P-SV problem, it can be easily extended to 3-D problem.     

推进煤矸石资源化利用的对策建议

煤矸石是我国排放量和堆存量最大的工业固体废弃物之一，但又是可以利用的资源，只要加以资源化利用，就能会变废为宝。在研究我国煤矸石综合利用现状的基础上，指出了煤矸石综合利用中存在的主要问题，从制定规划、完善经济政策、加强法制建设等方面提出了加快推进煤矸石资源化利用的建议。     

福建省大田县广平含煤区推覆构造特征及找煤预测

通过对区内推覆构造及地层等的研究，认为广平含煤区推覆体下蕴藏着丰富的煤炭资源，童子岩组煤系地层埋藏深度主要受发育于童子岩组上部的F1、F2推覆断层控制，并圈定出煤炭资源预测前景较好的3个区作为煤炭勘查后备基地。     

地质单位财务管理咨询刍议

地质单位对自身无力解决的重要财务管理问题应该寻求外部咨询机构的有效帮助，针对地质单位财务管理中存在的主要问题提出需要咨询课题，而咨询机构通过对地质单位的财务状况进行调查分析后，提出科学、合理有效的财务管理改善方案和指导实施方案。     

Toxicities of p-nitrotoluenes and their effects on blood corpuscles and ovaries in Crusian carps (Carassius auratus)

p-nitrotoluene is an important organic intermediate widely used in pesticide, foamed plastics, dyestuff and medicine industries. In this paper, Crusian carps (Carassius auratus) were exposed to dilute p-nitrotoluene solutions with different concentrations of 0, 20, 40, 80, 120, 160, 240 and 320 μg/L; the subsequent physiological responses to the chemical were observed, and the variation characteristics of blood corpuscles, ovaries and oocytes were studied by bio-microscopy. Results showed that even very low concentrations of p-nitrotoluene would lead to toxicosis and even the death of Carassius auratus. The bio-microscopic structures revealed that, compared with the compartment of Carassius auratus growing in the p-nitrotoluene-free water (the control group), the lower concentrations of p-nitrotoluene (for example no more than 80 μg/L) would result in the faster disintegration of erythrocytes and the significant enlargement of oocytes, while the higher contents of p-nitrotoluene (no less than 240 μg/L in this case) would inhibit the division of cells and their further growth, even degenerate blood corpuscles and ovaries, suggesting stronger estrogenic activities. The study is financially supported by the Development Foundation of Science and Technology under Shandong Provincial Education Department (No. J05D51).     

酶法催化餐饮废油制备生物柴油的研究

以废物资源转化为宗旨,利用固定化脂肪酶催化餐饮废油与乙醇反应制备生物柴油,通过实验获得最佳酯化反应条件:反应温度47℃、有机溶剂为正己烷、醇油比3∶1,5次投加乙醇,酶用量为0.3g,反应时间32h时,生物柴油产率可达81%。     

基于asp的宏观前兆信息在线管理系统

本文经过对宏观前兆信息的报送、管理等有关事项的考察和分析,确立了宏观前兆信息管理系统的具体实现功能。并阐述了系统的体系结构和功能模块的设计,实现宏观前兆信息的在线添加和系统的在线管理。经过授权的用户可以通过Web浏览器,以人机交互式的客户端程序,实现对宏观前兆信息的在线添加、管理、查询和统计等功能。     

用BP神经网络预测土抗剪强度指标c、ψ

提出了应用BP神经网络来预测土抗剪强度指标c、ψ.结合工程实例,详细介绍了该方法的建模过程,结果表明预测结果和实测结果很接近,神经网络在土性参数方面应用前景很广阔.