土基上垃圾堆山的山体稳定问题

通过对天津市某垃圾堆山工程的研究,阐明土基上垃圾堆山的山坡稳定分析,山体稳定计算,地基稳定和沉降计算等山体稳定问题。     

地质体的二维数值剖分

本文通过对５种最基本的地质模型的建立及对角度不整合模式的剖分,详细探讨了对三维地质体进行二维（剖面）数值剖分的算法,建立起地质体和油气储层从建模到量化全过程的工作方法和思路。     

宝钢1号高炉改进性大修的设计

介绍了宝钢１号高炉改造大修设计的主要内容,着重论述了高炉一代炉役设计寿命由８年提高到１２年并争取达到１５年时在炉体各部位结构设计中,如炉体耐材砌筑、冷却结构、冷却水系统、炉体检测及炉体辅助设备等方面采取的一些改进措施。     

Better Sintering through Green-State Deformation Processing

Aqueous colloidal suspensions of alumina were processed in the dispersed state and the flocculated state by controlling the double-layer interactions between the particles. Repulsive particle forces led to high packing densities but the green bodies were mechanically so weak that they were unable to retain their shape (the dispersed case). Attractive forces led to good green strength but the packing density was low and the particles were agglomerated (the flocculated case). The agglomerated structure of the flocced specimens could be fragmented by mechanical deformation of the green compact; the deformation was carried out under a superimposed hydrostatic pressure of less than 1 MPa. The flow stess of the flocculated structures depended on the deformation rate, and on the magnitude of the superimposed hydrostatic pressure. The flow stress was 2.5 kPa at a strain rate of 0.1 s⁻¹. Deformation processing of the flocced structures increased the green (relative) density from 0.51 to 0.62. The sintering behavior of underformed and deformation-processed flocced structures was studied. Deformation-processed green bodies sintered more rapidly and yielded a final grain size that was smaller and more uniform than that obtained from the undeformed specimens. The ability to homogenize and densify the packing of flocculated structures by deformation processing suggests new opportunities in green-state processing, for example (i) uniform mixing of more than one kind of particle or particles and fibers, and (ii) net shape forming by injection molding or extrusion, without the use of organic binders.     

Toxicokinetics of 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA) in the European corn borer,Ostrinia nubilalis (Hübner)

2,4-Dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA), the major hydroxamic acid present in corn, and its tritiated derivative, were prepared synthetically for use in the determination of the toxicokinetics of this insect deterrent in the European corn borer (ECB),Ostrinia nubilalis. In growth studies with DIMBOA (0, 0.05, 0.2, and 0.5 mg/g diet), the mean time to pupation and adult emergence were significantly lengthened by an increase in concentration. Pupal and adult weights, for both female and male, decreased with an increase in concentration. Increased larval and pupal mortality occurred at the highest concentration of DIMBOA. DIMBOA, at concentrations of 0.2 and 0.5 mg/g diet, resulted in a decrease in the number of egg masses produced per female, and at 0.5 mg/g diet, in a decrease in the number of eggs per egg mass. Larvae fed from the neonate stage on a diet containing 0.2 mg [³H]- + [¹H]DIMBOA/g diet showed an increase in the content of label from fourth to fifth instar, but levels declined at pupation and emergence. A large amount of the labeled compounds was excreted by the insect in the pupal case. In dose-related studies, both uptake and excretion increased with an increase in concentration of DIMBOA (0.05, 0.2, 0.4 mg/g diet), while a body burden (concentration in the tissues/concentration in the frass) of approximately 0.25 was maintained for all concentrations. At the highest dose of DIMBOA (0.4 mg/g), the ECB increased consumption, possibly to compensate for the toxic effects of the compound. In topical application studies, elimination of the labeled compound in the frass was rapid, reaching 65% by 4 hr and 88% by 48 hr. Accumulation of label in tissues other than hemolymph was low. The results show that the ECB does possess adaptive mechanisms to deal with the effects of this host-derived compound.     

Dynamic model for landsliding monitoring under rigid body assumption

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Effects of different simulated fluids on anticorrosion biometallic materials

1　ＩＮＴＲＯＤＵＣＴＩＯＮＣｏｒｒｏｓｉｏｎｉｓｏｎｅｏｆｔｈｅｍｏｓｔｉｍｐｏｒｔａｎｔｒｅａｓｏｎｓｆｏｒｔｈｅｆａｉｌｕｒｅｏｆｍｅｔａｌｌｉｃｂｉｏｍａｔｅｒｉａｌｓｉｍｐｌａｎｔｅｄｉｎｈｕｍａｎｂｏｄｙ .Ｒｅｓｅａｒｃｈｉｎｇｔｈｅｉｍｐｌａｎｔｅｄｍｅｔａｌｓ’ｃｏｒ ｒｏｓｉｏｎｓｈｏｕｌｄｃｏｎｓｉｄｅｒｍａｎｙｆａｃｔｏｒｓ ,ｓｕｃｈａｓｔｈｅｐｒｏｐｅｒｔｉｅｓｏｆｔｈｅｍａｔｅｒｉａｌｓ ,ｔｈｅｃｏｍｐｏｓｉｔｉｏｎｏｆｔｈｅｂｏｄｙｆｌｕｉｄｓ ,ｔｈｅｃｈａｎｇｅｏｆｐ…     

轿车铝合金油泵壳体液态挤压工艺

采用液态挤压代替压力铸造及热模锻生产轿车铝合金油泵壳体,不仅克服了压铸件内部容易形成气孔和氧化夹杂的缺陷,而且减少了热模锻的投资及提高了材料利用率。本文介绍了铝合金油泵壳体液态挤压的模具结构及设计参数、技术经济分析。     

球面瓦铸造工艺

本工艺以2＃锡基轴承合金（ZchSnSb11-6）为例,从球面瓦的结构入手,全面阐述了球面瓦的铸造工艺,从根本上解决了球面瓦的铸造质量。