环境的感悟--江苏省建湖县建湖会议中心设计

在建湖会议中心的设计中，以环境艺术为出发点，着眼于总体的和谐关系去完成艺术环境的塑造，并将建筑艺术与其功能结构以及建湖地域文化特质有机地结合，营造具有建湖地域文化氛围的会展空间。     

新形势、新条件下金工实习教学改革

本文讲述了新形势、新条件下金工实习的性质、目的和教学的基本要求。分析了职教金工实习的教学现状。并从金工实习的顺序、教学模式、教学计划、教学内容等多方面讲述了如何适应新的人才培养方案,改革金工实习教学模式。如何加强教学管理,提高实习效果。最后讲述了改革金工实习教学管理模式,提高师资队伍人员素质的方法。     

基于环投影特征的汽车轮毂定位与识别

为了实现汽车轮毂在辊道上随机混流状态下的型号自动识别,提出一种基于环投影特征的轮毂识别算法。该算法不受轮毂的角度和位置变化的影响。首先提取每种型号轮毂的半径及其环投影特征作为模板,然后求取待匹配图像的重心来近似轮毂的圆心,并在其附近分析每一点的环投影值来确定真正的圆心坐标与半径。利用轮毂的半径和环投影与模板进行粗匹配,筛选掉不匹配的型号。最后通过比较径向投影,返回相似度得分最高的型号。实验结果表明:该算法具有较高的稳定性和实时性,识别速度为1个/2 s。     

新建福厦铁路FX-8标BIM技术应用

本文以福厦铁路FX-8标为例,建立起全标段BIM模型,进行重点工点的方案深化、模拟分析,综合运用CAD、卫星地图、航拍及倾斜摄影模型实现施工前期红线确界、施工干扰调查、前期规划,还开展了隧道三维激光扫描开挖质量控制、喷淋养护、存梁路径优化、运梁模拟、工装设计等方面的应用。针对桥隧的特殊情况开发了形象进度管理和4D模拟模块,研发了建管平台,实现集成管理,提高管理效率,开发了施工监控和拆迁管理等模块,最终集成到智控中心统一维护管理,形成长距离带状工程BIM应用的解决方案。     

Operation of the IR-8 reactor with IRT-3M type fuel assemblies

The main features of the IR-8 reactor developed at the Russian Research Center ‘Kurchatov Institute' for investigations in nuclear physics, solid state physics, radiation chemistry, radiobiology as well as for radioisotopes production are described. The features of the IRT-3M type fuel assemblies (FAs) used in the IR-8 and other reactors are described. Data on the IRT-3M type FAs operation experience, confirming their high reliability up to average (by FA volume) burnup of uranium-235 (U-235) as >60%, are adduced.     

Thermal efficiency of solid electrolyte fuel cells with mixed conduction

The effect of mixed anionic and n-type electronic conduction in solid electrolytes on the thermal efficiency of a fuel cell system was analyzed quantitatively. The mixed conduction observed when electrolytes based on ceria are used in H₂/air fuel cell applications lowers the maximum attainable cell thermal efficiency to below 40%. Neither the zirconia nor the ceria based solid oxide electrolytes studied to date can be used in a low temperature (700 °C) system that meets simultaneously the requirements of power density and thermal efficiency for electric utility power plants. The material properties required for an advanced fuel cell power plant solid electrolyte were derived in terms of the ionic conductivity and the Schmalzried parameters P⊕ and P? : σ_ion > 0.033 (ω-cm)^?1, P⊕ > 10³ atm., P? < 10^?23 atm. at 700 °C.     

The cyclic voltammetry of carbon steel in concentrated sodium hydroxide solution

The potentiodynamic behaviour of carbon steel in 1.0 M, 2.5 M and 5.0 M NaOH at 20 ± 2°C is reported. The peak potentials and currents were found to vary linearly with the square root of the potential sweep-rate. It is shown that the “pore resistance” model cannot account quantitatively for the cyclic voltammetric behaviour of iron in sodium hydroxide solution. However, the sweep-rate dependencies of i_p and E_p suggest that the growth of the film on the surface occurs via an essentially resistive mechanism, which possibly involves the low field migration of ions through an oxide/hydroxide lattice.     

Key Recovery – Möglichkeiten und Risiken

Zusammenfassung   Dieser Beitrag untersucht verschiedene M?glichkeiten zur Wiederherstellung verschlüsselter Daten, ohne da? ein direkter Zugriff auf den vom intendierten Nutzer zur Entschlüsselung verwendeten Schlüssel besteht, und vergleicht sie hinsichtlich ihrer sicherheitstechnischen Eigenschaften. Eingegangen am 26.04.1998