瞬变电磁测深曲线微分参数解释方法

对于各种深度范围内的多层断面,可以用位于不同深度h_τ,纵向电导值为S_τ的导电薄层加以等效.S_τ,h_τ的表达式可以使用感应电压衰减曲线的微分值等参数换算得到.文中介绍了各种断面类型的S_(?)曲线特征及解释方法,表明S_τ比ρ_τ参数对地层具有更高的探测能力.     

颗粒-流体系统表观粘度和粒子群曳力系数的研究

利用RV20-M型转子粘度仪测定了玻璃珠-甘油体系的表观粘度,提出了体系表观粘度的关联式。并对单颗粒-流体系统的Re数和粒子的曳力系数进行修正,给出了一个适用于Re_m<2×10~5的多颗粒-液体系统中粒子曳力系数的关系式。     

AN/PU复合材料基体的共混改性研究

该文对AN/PU复合材料基体的共混改性进行了理论和实验研究。通过表观交联度等参数表征HTPB-ITPU共混体系的改性效果,并用SEM、DSC和IR等现代分析手段对多相体系的界面相互作用进行了探讨。结果表明,基体的共混改性是提高AN/PU复合材料力学性能的重要途径。     

表面包覆对TiO_2超微粒光学性质的影响

制备了一系列表面包覆油酸的TiO_2超微粒.结果表明,表面包覆油酸的TiO_2超微粒的表观光学带隙(E_s)随着超微粒粒径减小变小;相同粒径表面包覆油酸的TiO_2超微粒的表观光学带隙与表面包覆硬脂酸的TiO_2超微粒几乎相同,但比表面包覆十二烷基苯磺酸的TiO_2超微粒大.     

无机沉淀物气浮表观活化能影响因素的研究

选取Ｎｉ２＋，Ｐｈ２＋，Ｚｎ２＋，Ｂｉ３＋，Ｃｒ３＋，Ｆｅ３＋，Ｃｅ４＋等重金属离子生成氢氧化物、硫化物及磷酸盐沉淀作试验．研究了沉淀物的种类和形态、沉淀物与气浮剂的吸附形态、不同的气浮剂及气浮方式等对气浮表现活化能的影响．     

14C measurement of forest soils in Dinghushan Biosphere Reserve

Organic carbon in forest soils of Qingyunsi and Wukesong profiles can be divided into fast and slow components. Δ 14C values of these profiles decrease with increasing of depth. The Δ 14C values in 30-40 cm depth interval of Wukesong profile are decreasing sharply until a very low value, showing that a strong geological environment change occurred about 1 560 years ago. The 14C apparent ages of Wukesong profile show that the coniferous and broad-leaf mixed forests around Wukesong profile have been developing since 425 a BP, which is consistent with historical documents. The penetrating depths of "bomb 14C" in Qingyunsi and Wukesong profiles are 10 and 20 cm, respectively.     

Phylogenetic position of Schnabelia, a genus endemic to China： Evidence from sequences of cpDNA matK gene and nrDNA ITS regions

The chloroplast gene matK and the internal transcribed spacers (ITS) of the nuclear ribosomal DNA from Schnabelia, a genus endemic to China, and 6 genera of Verbenaceae and 13 genera of Lamiaceae were sequenced. The phylogenetic signal and validity outgroups were measured and evaluated by means of the relatively apparent synapomorphy analysis (RASA). Independent and combined phylogenetic analyses for the matK and ITS sequences were performed using the maximum parsimony (MP), neighbor-joining (NJ) and maximum likelihood (ML) methods, indicating that Schnabelia oligophylla and Caryopteris terniflora form a sister-group relationship. The Caryopteris complex is not shown to be a monophyly because Trichostema, C. paniculata and C. forrestii are paraphyletic to the clade containing the remaining members of the complex. A monophyly of Ajugoideae proposed by Cantino et al., including 8 genera in this study, is strongly supported and the closest relatives of Schnabelia are in the Ajugoideae (Lamiaceae), especially near Caryopteris terniflora. The polygenetic analyses also showed that the genera of Lamiaceae and Verbenaceae sampled in this tudy are phylogenetically mixed and the genus Avicennia is distant to other genera of Verbenaceae. RASA and combined analysis can be used as effective approaches to determining the relationships among phylogenetically complex groups.     

初始排污权分配的优化模型

总量控制目标的实现与排污权交易政策的顺利展开,首先要解决的一个关键问题是初始排污权的合理分配.在给定排污总量上限的前提下,从分配时兼顾经济最优和公平性出发,同时考虑各地经济、环境、社会发展等综合因素构建了初始排污权分配的极大极小模型,分析了解存在的KKT条件,讨论了模型的解法.此外,该模型考虑到了效用函数不可微的情况,并且能够根据政府的偏好对社会效用和公平性进行权衡.     

矿井地应力的分析与应用

以寺河矿西区为例,根据地应力现场实测数据,分析得出了最大主应力与深度之间的变化规律,判断了矿区的应力量级,确定了最大主应力的方向,判别了矿区应力场类型,从而为寺河矿的高产高效矿井建设提供重要的参考资料。     

用光散射法测表面活性剂胶束的表观摩尔质量

介绍了光散射法测量胶束表观摩尔质量的方法，以Ｒａｙｌｅｉｇｈ散射公式为理论基础，设计并调度了实验装置，用ＣＣＤ摄像机系统对激光通过试液所产生的散射光进行采样，并由计算机进行运算处理，由此测定了表面活性剂溶液中胶束的表观摩尔质量。结果表明，随体系中添加物质的不同，因胶束界面吸附及增溶作用，表观摩尔质量随之发生变化。