结构性土二元介质模型的有限元模拟

针对土的结构性对边坡稳定性的影响,结构性土二元介质模型将胶结元看成理想弹脆性材料,摩擦元看成硬化型弹塑性材料。基于该模型建立考虑结构性土的强度准则,编制相应有限元程序用于Biot固结的有限元模拟。通过对比初始各向同性和初始应力各向异性结构性土的天然边坡算例计算结果,发现初始应力各向异性天然边坡的安全系数要高于初始均质天然边坡;嵌入初始应力各向异性结构性土的强度准则后可以观察计算过程中边坡破坏区的发展,为采用破坏区贯通作为边坡的破坏标准的天然边坡的稳定性分析提供了一种新的思路且具有良好的工程适用性。     

内燃法整体热处理工艺在压力容器上的应用

介绍了粘油氧化反应器的内燃法整体热处理以及易出现的问题和对策.     

Study on Sintered Synthetic Hercynite Clinker

Special grade bauxite and roll scale were used as raw materials to investigate the influences of reducing atmosphere and firing temperature on sintering clinker. The results showed that: 1) The mixture of the materials could be sintered enough to synthesise hercynite under reducing atmosphere by adding reducing reagent ; 2) The hercynite dinker could be sintered to high density and the content of FeAl2O4 may attain 80～90% under the firing tempera-ture of 1550℃.     

Learning high-dimensional correspondence via manifold learning and local approximation

The recent years have witnessed a surge of interests of learning high-dimensional correspondence, which is important for both machine learning and neural computation community. Manifold learning–based researches have been considered as one of the most promising directions. In this paper, by analyzing traditional methods, we summarized a new framework for high-dimensional correspondence learning. Within this framework, we also presented a new approach, Local Approximation Maximum Variance Unfolding. Compared with other machine learning–based methods, it could achieve higher accuracy. Besides, we also introduce how to use the proposed framework and methods in a concrete application, cross-system personalization (CSP). Promising experimental results on image alignment and CSP applications are proposed for demonstration.     

2，6－二氯－4－硝基苯胺的合成

以盐酸－过氧化氢为氯代试剂，由对硝基苯胺制备了２，６－二氯－４－硝基苯胺。结果表明，过氧化氢的比例、反应温度对收率有较大的影响。过氧化氢过量，反应温度在５０℃时，可缩短反应时间，提高收率。     

提高科技创新实力实现我国炼油工业的持续发展

分析了21世纪我国炼油工业要持续发展，国际竞争能力要大力提高，涉及到的原油资源战略、现代化企业管理、行业体制和机制、企业机构调整、人才机制及科技创新等多方面问题，并就产品质量、深度加工、油化一体化、信息技术和运输燃料替代技术，以及如何提高科技创新能力、加强科技开发等技术发展战略，提出了一些对策和建议。     

多孔羟基磷灰石生物陶瓷的进展

多孔羟基磷灰石生物陶瓷是一种性能优异的人体硬组织修复材料，在植入界面后它具生物降解性，置入体内能逐步参与代谢以至最终与人体骨结合成一体。本文在综合大量国内外文献的基础上，阐述了多孔羟基磷灰石生物陶瓷的性质、研究和发展。     

Seasonal evolution of the interannual variability of chlorophyll-a concentration and its forcing factors in the northwestern Pacific from 1998 to 2010

The northwestern Pacific Ocean is a complex region with significant biological spatial variations on a seasonal timescale. To investigate the joint variation patterns on both seasonal and interannual timescales, a season-reliant empirical orthogonal function (S-EOF) analysis was applied to seasonal mean chlorophyll-a concentration (chl-a) anomalies in the northwestern Pacific Ocean during the period 1998–2010. The first two dominant modes accounted for nearly 31% of the total interannual variance, with the second S-EOF mode (S-EOF2) lagging behind the first S-EOF mode (S-EOF1) by one year. S-EOF1 featured a strong variation pattern to the north of 30° N, with maximum chl-a in winter and minimum chl-a in summer. However, S-EOF2 indicated an opposite seasonally evolving pattern compared with S-EOF1, with chl-a increasing along the Kuroshio and extension current from boreal winter to autumn. Both these modes revealed significant relationships with climate-related indices. The two modes corresponded to the central Pacific (CP) La Niña developing episodes and the turnaround from eastern Pacific (EP) La Niña to CP El Niño, respectively. Both modes were associated with the cold phase of the Pacific Decadal Oscillation, which played an important role in prolonging the impact of the El Niño/Southern Oscillation on chl-a seasonal evolution from 1998 to 2010. In addition, we discuss the possible factors dominating chl-a seasonal variation, in terms of the subregions of the northwestern Pacific Ocean. In the subtropical northwestern Pacific Ocean (15° N – 30° N), the chl-a growth was primarily nutrient-limited, whereas in the mid-latitude northwestern Pacific Ocean (35° N – 50° N), the chl-a growth was mainly light-limited.     

基体韧性对PS改性PVC体系性能的影响

研究了PS对未增韧PVC体系及用CPE预增韧PVC体系韧性的影响,发现在用CPE预增韧PVC基体后,PS的增韧效果更为显著,但增韧机理井无改变,仍可用"空穴增韧"的机理来解释。     

表面处理对木粉增强PVC发泡复合板材性能的影响

研究表面处理的木粉对发泡聚氯乙烯(PVC)板材的增强改性效果。使用铝酸酯偶联剂、丙烯酸丁酯预聚物对木粉进行表面处理，将其混合到聚氯乙烯发泡板材配料中进行板材加工生产，结果表明，经处理的木粉能提高发泡PVC板材的拉伸强度和冲击强度。用铝酸酯偶联剂处理木粉的发泡板材力学性能好于用丙烯酸丁酯预聚物处理的板材；而用丙烯酸丁酯预聚物处理木粉的复合材料在流变加工性能优于用铝酸酯处理木粉的复合材料。