AT1200型斜天井钻机的研制与改进

为了解决倾斜矿体开采中斜天井掘进问题，我院新开发了我国第一代斜天井钻机产品。本文较详细地介绍了其设计思想，并对工业试验情况进行了分析。经过三个阶段的反复试验和改进后，使该设备具有优良的技术性能和使用效果。     

影响砂金矿资源可靠性的因素及改进措施

近些年砂金生产企业相继出现重大投资失误，造成严重经济损失，这都是因为地质资源不可靠所造成的。造成地质资源不可靠的原因既有技术方面的，也有人为方面的．对这两方面的原因进行了分析、阐述，并针对性地提出了改进措施：修改现行砂金矿勘探技术规范、实行小规模试验性开采、业主提前介入监督。     

Preparation and characterization of porous PDMS beads for oil and organic solvent sorption

In this article, poly (dimethyl siloxane) (PDMS) porous beads were prepared by suspension polymerization method using n‐octane and carbon tetrachloride (CCl₄) as diluents and pore formation agents. The apparent density, porosity and other characteristics were characterized. The absorption experiments showed that the porous PDMS beads exhibited more absorption capacity and faster absorption rate toward oils than the nonporous or oligoporous PDMS beads did, moreover they are of remarkable stability and recyclability, which could provide a path to absorb the oils floating on water. POLYM. ENG. SCI., 54:2965–2969, 2014. © 2014 Society of Plastics Engineers     

A Moisture Transfer Model for Isothermal Drying of Plant Cellular Materials Based on the Pore Network Approach

Plant materials with cellular structure, like fruits and vegetables, are often viewed as porous media in terms of model building of the drying process, on the basis of a hypothesis that all of the moisture of a plant tissue is trapped in a continuous and connected pore network system. However, most of the moisture in the plant tissue is contained naturally in enclosed cells. In the course of drying, the trapped moisture has to cross the cell membranes and then migrates in the extracellular space. Based on this concept, a pore network model for isothermal drying of plant materials was developed in which two stages of moisture movement—transmembrane transfer and extracellular transfer in the pore network—were considered. Finally, the isothermal convective air-drying processes of a potato slice were simulated. The calculated results were validated by the experiments conducted under the simulation conditions.     

锅炉点火系统故障分析与处理

我厂有两台循环流化床锅炉,各有一套独立的自动点火系统。两套点火系统均使用天然气作为燃料,自投用以来经历了无数次的点火,其过程中也出现了许多问题,本文将对其中的典型故障进行分析和探讨。     

Dearomatization of Indole Derivatives via Palladium‐Catalyzed C?H Bond Functionalization of Pyrroles: Convenient Construction of Spiroindolenines

An intramolecular palladium(II)‐catalyzed dearomative arylation reaction of indoles via C H bond functionalization was developed, providing access to structurally novel spiroindolenines with moderate to good yields. A one‐pot process for the synthesis of spiroindoline derivatives was also realized.

     

Enantioselective One‐Pot Reaction: Organocatalyzed Synthesis of Fully Functionalized Oxabicyclo[2.2.2]octanes with Seven Contiguous Stereocenters

An enantioselective one‐pot Michael/Michael/Henry/hemiacetalization reaction between α,β‐unsaturated aldehydes, α‐ketoamides, and nitroalkenes under mild conditions catalyzed by a diarylprolinol silyl ether has been developed. The sequential methodology provides a direct approach to a wide range of fully substituted chiral oxabicyclo[2.2.2]octanes with seven contiguous stereocenters in moderate to excellent yields (up to 99%), high to excellent diastereoselectivities (up to >25:1 dr), and high to excellent enantioselectivities (up to 99% ee).

     

Production of glass-ceramics using Municipal solid waste incineration fly ash

Municipal solid waste incineration(MSWI) fly ash is a by-product from municipal waste incineration.According to incomplete statistics, each year more than one million tons MSWI fly ash was produced in China. Owing to high heavy elements content, widely used disposal methods of landfill are not suitable for MSWI fly ash treatment. In this study, by using MSWI fly ash as raw materials, glassceramics was synthesized for the solidification of heavy metals and waste recycle. Process parameters, including composition, heat treatment temperature and time, were studied and optimized. Under optimizing conditions, the product has good properties of density of 3.42 g·cm~(-3) and Vickers hardness of 6.91 GPa. Moreover, the leaching concentration of heavy metal elements meets allowable values of toxicity characteristic leaching procedure(TCLP).This study offers an alternative for MSWI fly ash recycle.     

基于包容性的城市慢行交通综合导视交互设计研究

针对城市慢行交通系统的导视进行了研究,提出了基于包容性理念的综合导视系统的设计概念,设计过程包括了原型测试、行人动线研究、互动导视系统的设计等内容。     

浅谈古建筑工程施工监理的工作

近年来,建筑业发展飞速。古建筑作为文物保护工作的关键,监理工作决定了文物保护的最终结果。本文根据实际监理工作对其进行了分析,并且针对监理工作中的问题,提出了古建筑工程施工中需要注意的内容。