世构体系框架结构模型振动台试验研究

为了研究预制预应力混凝土装配整体式框架结构(世构体系)抗震性能,以某实际工程世构体系框架结构为原型,对其底部两层进行缩尺模型振动台试验研究。观察试验模型在不同振动工况下的损伤及破坏情况,对模型在各水准地震作用下的动力特性、加速度、位移、应变及扭转反应进行分析,并根据试验现象与试验结果,对世构体系框架整体进行抗震性能的综合评价。结果表明：该预制装配框架体系在多遇地震作用下未出现明显损伤,在罕遇地震作用下节点核心区未出现裂缝,模型仍能保持较好的整体性,抗震性能良好;试验模型结构布置合理,地震作用下主要运动形式为平动;罕遇地震作用下,模型自振频率最大降幅为21.89%,最大层间位移角为1/122;虽然模型存在一定程度的损伤,但其弹塑性层间位移角均小于GB 50011—2010《建筑抗震设计规范》中的限值,满足我国“小震不坏”、“大震不倒”的抗震设防目标。     

Monotonic torsional resistance and fatigue resistance of novel SCOPE RS instruments

To evaluate monotonic torsional resistance and fatigue resistance of novel SCOPE RS instruments and to compare ROTATE, Hyflex CM, OneCurve, and ProTaper Next instruments as a counterpart. The instrument groups were as follows: SCOPE RS; ROTATE; HyflexCM; OneCurve; ProTaperNext. The cyclic fatigue resistance of unused instruments was tested at both room and body temperatures (n = 10). The time to fracture, the mean number of cycles until failure, and the length of the fractured fragments were analyzed. The monotonic torsional resistance of new instruments was measured in accordingly American National Standards/American Dental Association No. 28 and International Organization for Standardization 3630–1:2008 specifications (n = 10). The maximum torque and angular deflection at break were recorded. The fractographic examination was performed by scanning electron microscope. Energy‐dispersive X‐ray spectroscopy was used to investigate the microstructure of NiTi instruments. One‐way ANOVA with Games‐Howell Post Hoc multiple comparisons tests were used (p < .05). The ROTATE had superior cyclic fatigue resistance than other groups in both temperature conditions (p < .01). However, it exhibited lower torsional resistance than SCOPE RS (p < .01). SCOPE RS had superior torsional resistance than other groups (p < .01). Micrographs revealed typical features of fatigue behaviors in all groups. Weight percentages of the Ni and Ti revealed similarity for all instruments. The novel SCOPE RS instruments presented superior monotonic torsional resistance but failed to show any improvement in the cyclic fatigue resistance compared with its counterparts, ROTATE, HyflexCM, and OneCurve.     

新一代炼焦技术(SCOPE21)的开发

日本煤综合利用中心和日本钢铁联盟于1994年至2003年共同进行了长达10年之久的新一代炼焦工艺--SCOPE21(21世纪高生产率环保型超级炼焦炉)的开发研究.半工业性工厂至2003年3月按计划已成功操作大约1年时间.同时,SCOPE21工艺的设计概念已得到验证,取得了用于工业化生产设备设计所需的工艺技术数据.而且,根据取得的结果,完成了项目的可行性研究.     

从最近日本高炉操作看对焦炭质量的期待

根据以往有关焦炭质量和高炉操作之间关系的研究，对大型高炉今后在高生产率、低焦比条件下稳定操作所要求的焦炭质量进行了分析，同时对新一代炼焦工艺(SCOPE212)的期待及其所具有的能满足上述大型高炉操作所要求的焦炭质量和特征进行了介绍。     

SCOPE21的研发与工业应用现状

简述了新一代炼焦技术SCOPE21的研发背景。介绍了SCOPE21的工艺流程和三个研发阶段,并对比分析了SCOPE21的试验装置、可行性研究装置与实际工业化应用的各项技术经济指标。阐述了SCOPE21的技术优势。     

基于LabVIEW的超声测量系统

介绍了最具代表性的图形化编程开发平台LabVIEW。以NI 5122数据采集卡和C架等为硬件,以LabVIEW2015软件作为开发平台,将NI Scope和VISA结合起来,搭建了超声测量平台系统。NI SCOPE实现数据采集和波形图显示,VISA实现串口通信。该系统可以实现C架的控制,并实现连续测量和定点测量,可以根据需要改变C架的速度和最远位置,同时也能改变最小采样长度和最小分辨率。该系统用户界面良好,使用方便。     

非参数统计分析方法在冷凝试验不确定度分析中的应用

SCOPE试验的核心目标是在CAP1400非能动安全壳冷却系统运行参数范围内验证蒸汽/空气混合气体冷凝现象的目标关系式,为安全壳响应分析提供输入。试验结果不确定度分析是试验数据分析的必要步骤,对于评价试验结果的品质具有重要意义。本文采用随机抽样加WILKS公式非参数统计分析方法确定SCOPE试验Sherwood数不确定度区间,为冷凝试验不确定度分析提供了简洁的理论方法。文中介绍的不确定度分析方法可方便地拓展到其他试验数据分析处理中,具有重要的工程应用价值。     

SCOPE21炼焦技术的研发与实用

介绍了SCOPE21炼焦技术的研发过程及实用情况，通过对研发及实用的比较与分析，可看到SCOPE21炼焦技术研发的预期与实用后的情况所存在的差异。SCOPE21的工业装置与单孔试验装置的不同点主要表现在：热压型煤温度由350～400℃降至165℃；原料煤入炉温度由350—400℃降至250℃；焦饼温度由750—850℃提高至1000℃；结焦时间由7．4h延长至13h。从实际操作情况看，SCOPE21工业装置的实践效果与单孔试验装置的预期效果存在一定差异。     

Improvement of the SPH Method for Pin-by-Pin Core Calculations

In this paper, improvement of the SPH method (the improved SPH method) is proposed. The SPH method is commonly used in pin-by-pin mesh core calculations to reduce cell-homogenization error. The investigation revealed that the normalization condition of the SPH factor in the conventional SPH method is not appropriate for multi-assembly calculations in which different assembly types are adjacent. Since the conventional normalization condition does not incorporate flux discontinuity between assemblies, cell homogenization error in assembly peripheral region becomes larger. In the improved SPH method, the SPH factor is divided by an averaged “cell-level” discontinuity factor obtained in each fuel assembly. Though the SPH factor is somewhat modified from the conventional value, no additional homogenization parameters (e.g. discontinuity factor) is necessary in core calculations. Test calculations were carried out in a simplified one-dimensional slab and two-dimensional PWR colorset geometries that simulate part of actual core geometry. The calculation results showed that the improved SPH method effectively reduce the cell-level homogenization error especially in assembly peripheral region. Since we can easily implement the improved SPH method by slight code modifications, it can be a promising candidate of the cell-homogenization method for pin-by-pin core calculations.     

统一监控、诊断、分析PROFIBUS、PROFINET和工业以太陬

一个安全、可靠的工业网络可保证工业系统正常无误运行,从而为工厂自动化不间断生产保驾护航。因此,能够实现工业网络的统一化监控和诊断是每一个用户的愿望。本文介绍了一个基于THSCOPE（软件）＋THLINK（硬件）的网络监控解决方案,让PROFIBUS、PROFINET和工业以太网的统一化监控、诊断和分析变为了现实。