带吊车门式刚架轻型钢结构厂房的设计与分析

以实际工程为背景，采用门式刚架轻型房屋钢结构设计规程，对带吊车门式刚架、吊车梁、抗风柱及基础的受力特点、设计方法进行分析，解决了设计中所遇到的问题。     

Ornament and function

The architects and builders in the past lacked our knowledge concerning fluid dynamics, but they exhibited a deep rooted ability to observe and reflect - thus, different cultures have developed by trial and error. The authors have produced a stimulating analysis which couples the science of fluid dynamics and a sensitive understanding of past cultures. The paper is recommended reading.     

冷库地坪防冻臌机械通风的传热计算

设计手册中关于使用机械通风防止冷库地坪冻臌的参数（风道直径、间距及长度）仅是推荐值，它忽略了地坪结构、土壤温度和外界空气温度对通风系统节能的影响，因而造成地基土壤的热损失和冷库负荷的增大。从冷库节能和冷库建筑安全使用出发，对采用机械通风防止地坪冻臌进行了传热分析，提出了在传热计算中参数的合理选择和通风系统的设计方法。     

MIM隧道结的电子输运特性和发光研究

论述作为一种新型发光器件的ＭＩＭ隧道结的发光机理，报告了该器件的发光现象和Ｉ－Ｖ特性曲线中负阻现象的实验观察。数据显示，结中表面等离极化激元（ＳＰＰ）与粗糙度的耦合是引起光发射的主要方面，ＳＰＰ对隧穿电子的阻塞作用导致了电子输运中的负阻现象。此外，还观察到了直接辐射的紫外峰。     

陕西省引红济石调水工程1#支洞塌方原因分析及对策

塌方是隧洞施工过程中经常遇到的难题,本文针对引红济石工程1#支洞在施工过程中出现的两次塌方原因进行分析,总结出隧洞施工过程中避免塌方的主要方法和策略,具有普遍的借鉴意义。     

东津水电站引水隧洞进口不良地质段施工

东津水电站引水隧洞进口段工程地质条件恶劣，施工干扰大，渡汛工期紧。采用喷锚支护洞脸边坡，洞口明挖３ｍ浇筑钢筋混凝土明拱和Ｌ形护坡墙；洞身段采用新奥法施工，先打通上导洞；进口４０ｍ分段开挖，分段衬砌；进水塔压板混凝土模板采用门字框架钢支撑；排除了施工干扰，防止了洞口滑塌，进口段塌方的恶性事故发生，保证了引水隧洞工程的顺利施工。     

矿区复杂地质条件下隧洞围岩塌方处理

主要介绍金堆城东川河改道工程隧洞施工过程中出现的一次较大塌方治理，塌方体松散并含孤石，传统方法无法处理，根据塌方体的特点，有针对性地采取自钻式锚杆、固结灌浆等施工工艺，并获得成功；对隧洞衬砌、地表陷坑进行了处理，确保了工程安全、质量。同时根据矿区隧洞围岩复杂多变的特点，对后期隧洞施工提出了建议。     

房屋基础因地道塌陷的加固处理

本文通过对房屋基础因地道塌陷事故的处理，提出一种结构受力合理、施工便利、经济性好的基础加固新方法，供今后实际工程事故处理时参考。     

Excavation of Inlet Tunnels at Geheyan Power Station

1　ＯｖｅｒｖｉｅｗＴｈｅＧｅｈｅｙａｎＰｏｗｅｒＳｔａｔｉｏｎｈａｓｆｏｕｒｃｉｒｃｕｌａｒｉｎｌｅｔｔｕｎ ｎｅｌｓ，ｏｎｔｈｅｒｉｇｈｔｂａｎｋｏｆｄａｍｓｉｔｅ，ｗｉｔｈｔｈｅｉｒｅｘｃａｖａｔｉｏｎｄｉ ａｍｅｔｅｒｏｆ 11．3ｍｔｏ 12．5ｍ，ａｆｔｅｒ ｌｉｎｉｎｇｄｉａｍｅｔｅｒｏｆ 9．5ｍ，ａｘｉｓ ｔｏ ａｘｉｓｓｐａｃｉｎｇｏｆ2 4ｍ．Ｔｈｅｔｈｉｃｋｎｅｓｓｏｆｐｉｌｌａｒｓａｒｅｅｑｕａｌｔｏｔｈｅｔｕｎｎｅｌｄｉａｍｅｔｅｒ．Ｔｈｅｉｎｔａｋｅｃｅｎｔｅｒｉｓａｔｅｌｅｖａ ｔｉ…     

Radiation effects on insulators for superconducting fusion magnets

Fibre-reinforced plastics (FRPs) are candidate materials for the insulation of superconducting magnet coils in future fusion reactors. This paper reports on a test programme performed to assess the mechanical properties of these materials and to obtain information on the damage and fracture mechanisms. Different types of FRPs (epoxies and poly- and bismaleimides as resins; two- and three-dimensional E-, S- or T-glass fabrics as reinforcements) were irradiated at room temperature by 2 MeV electrons and ⁶⁰Co-gamma rays up to 1.8 × 10⁸ Gy and by different reactor spectra up to a neutron fluence of 1 × 10²³ m⁻² (E > 0.1 MeV) at room temperature, 80 K or 5 K. Mechanical tests in tension as well as in the intralaminar crack opening and shear mode were carried out on the irradiated samples at 77 K. After low temperature irradiation, half of the samples were subjected to a warm-up cycle to room temperature before testing at 77 K. Results on the influence of different radiation sources and annealing cycles on the mechanical properties of these materials will be discussed.