基于模糊包含的粗糙集模型与模糊信任测度

提出基于模糊包含的模糊粗糙集模型,并给出其相关性质。讨论由模糊粗糙集的下、上近似所决定的模糊信任测度、模糊似然测度的性质并将之应用到随机模糊信息系统的属性约简中。     

在役21/4Cr-1Mo钢制加氢反应器回火脆化试验研究

通过对加氢精制反应器中放置了14年的挂块进行母材化学成分分析、堆焊层铁素体含量测定、母材和焊缝拉伸试验及冲击试验并在扫描电镜下对冲击断口进行微观观察与分析。同时把本次试验结果与在加氢裂化反应器中放置4年的挂块分析数据进行比较,分析挂块的脆化状况,进而研究获得该钢材的脆化规律,评定该反应器的使用状况。     

FA224型梳棉机工艺配置的体会

为了研究FA224型梳棉机工艺配置,介绍了FA224型梳棉机纺不同品种时,根据原棉性能确定的最佳工艺配置,试验分析了前后棉网清洁器工艺效果的差异,并就盖板反转相关工艺配置进行了分析,认为一般情况下前棉网清洁器的隔距偏小掌握,后棉网清洁器的隔距偏大掌握,且盖板反转工艺要把握好分梳强度和盖板花量两者之间的关系.     

新型梳棉机自调匀整装置的设计与开发

设计并研制了一种新型梳棉机自调匀整装置,该装置可在喂棉和出棉口两处进行检测,并控制喂棉罗拉速度和道夫速度,结构设计独特.针对梳棉机纤维梳理规律复杂、难以精确建立模型的特点,设计了基于现场调试经验的智能控制算法.新型自调匀整装置安装应用于JE226型高速梳棉机的实践证明能有效控制生条的重量偏差和不匀率.现场试运行情况表明,该控制方案最小匀整片段小于0.05 m,5 m生条重量不匀率小于1.5%,实现了科研成果的产业化推广.     

蔗渣纤维制备高取代度羧甲基纤维素

采用三次醚化法 ,并加入双氧水活化 ,由甘蔗渣纤维在乙醇溶液中制备了取代度 ( DS)可达 1 .3的羧甲基纤维素( CMC) ,考察了各种因素对取代度的影响。     

合成法甘露醇纯度的旋光测定

提出了在测定甘露醇纯度中增加比旋度测定的观点 ,论述了甘露醇纯度中比旋度与甘露醇的含量、熔点之间的关系 ,力求使其纯度测定更为准确。     

Modelling changes to electricity demand load duration curves as a consequence of predicted climate change for Australia

In this paper, we describe a method for constructing regional electricity demand data sets at 30 min intervals, which are consistent with climate change scenarios. Specifically, we modify a commonly used linear regression model between regional electricity demand and climate to also describe intraday variability in demand so that regional load duration curves (LDCs) can be predicted. The model is evaluated for four different Australian states that are participants in the Australian National Electricity Market (NEM) and the resultant data sets are found to reproduce each state's LDCs with reasonable accuracy. We also apply the demand model to CSIRO's Mk 3 global climate model data sets that have been downscaled to 60 km resolution using CSIRO's conformal-cubic atmospheric model to estimate how LDCs change as a consequence of a 1 °C increase in the average temperature of Australian state capital cities. These regional electricity demand data sets are then useful for economic modelling of electricity markets such as the NEM.     

支持QoS的覆盖组播分布式动态路由研究

研究了带度和延时约束的覆盖组播动态路由问题,提出了动态适应性覆盖组播路由协议OMP,给出了一个基于分布式触发重组的组播路由算法——动态覆盖组播路由算法(DDCOMR),最后对该算法的复杂度进行了推证,对协议和算法的有效性进行了网络模拟。     

Asymptotic homogenisation in linear elasticity. Part II: Finite element procedures and multiscale applications

The asymptotic expansion homogenisation (AEH) method can be used to solve problems involving physical phenomena on continuous media with periodic microstructures. In particular, the AEH is a useful technique to study of the behaviour of structural components built with composite materials. The main advantages of this approach lie on the fact that (i) it allows a significant reduction of the problem size and (ii) it has the capability to characterise stress and deformation microfields. In fact, specific equations can be developed to define these fields, in a process designated by localisation and not found on typical homogenisation methods. In the AEH methodology, overall material properties can be derived from the mechanical behaviour of selected periodic microscale representative volumes (also known as representative unit-cells, RUC). Nevertheless, unit-cell based modelling requires the control of some parameters, such as reinforcement volume fraction, geometry and distribution within the matrix material. The need for variety and flexibility leads to the development of automatic geometry generation algorithms. Additionally, the unstructured finite element meshes required by these RUC are usually non-periodic and involve the control of specific periodic boundary conditions. This work presents some numerical procedures developed in order to support finite element AEH implementations, rendering them more efficient and less user-dependent. The authors also present a numerical study of the influence of the reinforcement volume fraction on the overall material properties for a metal matrix composite (MMC) reinforced with spherical ceramic particles. A general multiscale application is shown, with both the homogenisation and localisation procedures.     

1515—75型织机飞梭伤人事故的FT分析

事故树分析(英文缩写FTA)是安全系统工程的一个重要工具,用FTA方法对1515—75型织机飞梭伤人事故作了定性和定量分析,并根据分析结果提出了减少飞梭伤人事故的有效措施,以确保纺织工人的人身安全。