Influence of unit operations on the levels of polyacetylenes in minimally processed carrots and parsnips: An industrial trial

Carrots and parsnips are often consumed as minimally processed ready-to-eat convenient foods and contain in minor quantities, bioactive aliphatic C17-polyacetylenes (falcarinol, falcarindiol, falcarindiol-3-acetate). Their retention during minimal processing in an industrial trial was evaluated. Carrot and parsnips were prepared in four different forms (disc cutting, baton cutting, cubing and shredding) and samples were taken in every point of their processing line. The unit operations were: peeling, cutting and washing with chlorinated water and also retention during 7 days storage was evaluated. The results showed that the initial unit operations (mainly peeling) influence the polyacetylene retention. This was attributed to the high polyacetylene content of their peels. In most cases, when washing was performed after cutting, less retention was observed possibly due to leakage during tissue damage occurred in the cutting step. The relatively high retention during storage indicates high plant matrix stability. Comparing the behaviour of polyacetylenes in the two vegetables during storage, the results showed that they were slightly more retained in parsnips than in carrots. Unit operations and especially abrasive peeling might need further optimisation to make them gentler and minimise bioactive losses.     

Hybrid Taguchi-Immune Algorithm for the thermal unit commitment

In this paper, a Hybrid Taguchi-Immune Algorithm (HTIA) is presented to deal with the unit commitment problem. HTIA integrates the Taguchi method and the Traditional Immune Algorithm (TIA), providing a powerful global exploration capability. The Taguchi method (TM) is incorporated in the crossover operations in order to select the better gene for achieving crossover consequently, enhancing the TIA. It has been widely used in experimental designs for problems with multiple parameters. The effectiveness and efficiency of HTIA are demonstrated by presenting several cases, and the results are compared with previous publications. Our results show that the proposed method is feasible, robust, and more effective than many other previously developed computation algorithms.     

膜分离和吸附技术的教学改革与思考

本文阐述了吸附和膜分离技术在化工原理教学中的重要性,以材料科学的发展成就作为吸附和膜分离技术教学的内容,对化工原理中这两个新的单元操作进行了阐述。学生们通过学习可以掌握最新的单元操作的进展和发展方向。     

福州城市住宅户型模式发展趋势研究

回顾福州城市住宅户型的发展历程,针对福州城市住宅户型空间模式的发展现状,指出当前福州城市住宅户型发展中存在的一些问题。并结合当前政策调控的形势下,提出福州城市住宅户型模式发展的方向和策略,以期对未来一定时期内福州城市住宅户型空间模式的健康、稳定发展有所裨益。     

单位型住区邻里生活院落户外生活行为与空间研究

邻里生活院落是承载居民日常生活的重要场所,与居民生活密切相关.该文以单位型住区的邻里生活院落为对象,通过对院落中居民生活行为的观察和记录,从户外活动的主体、场地的使用、院落空间与邻里关系、底层小院的复合性等四个方面剖析了邻里生活院落与居民户外生活行为之间的关系,指出居民的邻里生活行为需求体现在院落空间的归属性、居民的户...     

GPS/INS技术在城市测绘中的试验

航空摄影测量是城市测绘的重要手段和先进方法,随着GPS/INS技术的出现,推进了航空摄影测量长足发展,为快速实施城市测绘提供了有力的技术保障。本文通过对陕西省铜川市试验区在数码相机同高精度的GPS/INS系统联结下,墩外业像控布点区域网的大小、GPS/INS直接定向的精度、GPS辅助空三和GPS/INS辅助空三的精度对比等方面进行分析总结,具有一定的科学性和实用性。     

混凝土配合比设计的教学模块探讨

针对培养水利职业技术人员为目的,以混凝土配合比设计的模块教学为研究对象,阐述了混凝土配合比设计模块教学的主要内容,并对课堂讲授和实践两模块的单元教学方法进行了探讨.     

兼容MCS-96指令集的ALU设计

设计了一款能够完全兼容MCS-96系列单片机指令集的ALU。在设计中使用了经过逻辑简化的运算单元和改进的T型进位链,有效缩短了关键路径的延迟。采用硬件资源共享的策略进行运算单元和移位单元的结构组织设计,在不增加指令执行周期的前提下,最大限度地减小了电路面积。     

数据流优化匹配在数字海洋中的应用

提出一种利用图形处理单元(GPU)协同CPU的实时数据流分析匹配机制,将海洋实时数据流与国家标准数据进行比对,分析水质是否异常.该方法将存储到分布式基站上的数据分类规整并阶段化存储,接受数据流匹配请求后,在实时数据流匹配分析系统中利用GPU进行匹配分析处理,并自动生成分析结果.实验结果表明,该方法可以缩短海洋监测的检测...     

基于OpenCL的MD5破解算法

在基于GPU的异构平台上,采用开放计算语言(OpenCL)实现破解算法,利用分轮生成攻击密码、图形渲染管线加速存取以及多密码并行等方法对算法进行优化,在Intel四核CPU Q8230(2.3 GHz)和一片NVIDIA GT200组成的平台上进行实验。实验结果表明,在相同CPU平台上该算法能够获得高于破解软件John the ripper 17倍的破解速度。