The impact of roasting on the ochratoxin A content of coffee

Roasting coffee led to a drop in the ochratoxin A (OTA) concentration, as measured by the reference method, especially for dark type roasts. The way the beverage was prepared also affected the OTA content, which could paradoxically be higher than that of the initial roasted coffee. Assays on the thermal stability of pure OTA showed that it ought to be found in larger quantities in roasted coffee. This suggested that OTA was masked by reactions with the substrate during roasting. The absence of OTA in green coffee is therefore the best guarantee of safety.     

集成电路密封用高纯邻甲酚醛环氧树脂的制备

ECN树脂中的可水解氯含量是决定树脂质量的—个重要指标。本文研究了反应温度、ECH/OCN配比、反应时间和碱用量等因素的影响,取得了规律性的认识,并获得最佳配方,制备出高纯度的ECN树脂系列产品。     

基于嵌入式系统开发平台的设计与实现

本文首先介绍了EVB2107评估板、评估板的系统开发工具和集成开发环境,然后对扩展板上各模块都从原理入手结合该模块要实现的功能说明其设计思想和实现原理,并就各模块驱动程序的编程思想及流程进行了论述。     

临安市城乡供水一体化的供水能力确定

文章采用分项定额法，单位人口综合用水量指标法和基准年法分别计算，确定城乡供水的供水能力。     

整体经济效益最优控制方法

本文提出了整体经济效益最优的动静态耦合的优化控制一体化方法，它在传统的两级优化控制结构中加入一层协调级，能有效地克服以往优化级撇开控制能量代价不计的缺陷。特别是一体化系统通过调级从控制层向优化层引入反馈，使得由于过程自身动态因素对操作点的制约，能有效地通知到优化层，避免了优化的盲目性和片面性。各个层次之间通过公用数据库交换数据，使它们的决策与目前生产过程的实际情况密切联系。     

Integrated solid-state nanopore devices for third generation DNA sequencing

Third generation DNA sequencing relies on monitoring the ionic current blockage during the DNA molecule’s threading through a nanoscale pore.It is still really tough to attain the single base discrimination on a DNA strand by merely analyzing the ionic current due to speedy DNA translocation and low spatial resolution.More integrated configurations are pursued to present versatile comparative dissimilarities of the four bases by enhancing the spatial resolution within a DNA molecule translocation event,such as transverse tunneling current,local potential change,and capacitance oriented voltage resonance.In this mini review,the insight is provided into the status quo on several functionalized techniques and methodologies for DNA sequencing and furthermore concluding remark and outlook are presented.     

超高层综合楼消防自控设计探析

讨论了超高层综合楼消防自控设计的必要性、可能性和具体的设计方法.     

交流电弧炉智能集成计算机控制系统

系统以工控机为中心,配以高性能的模块化外设组成一体化的计算机控制系统。采用温度控制外环和电流平衡控制内环的双环路结构来具体实现交流电弧炉温度和三相电流平衡的智能集成控制。外环采用模糊、神经网络和优化决策共同控制,内环则采用模糊专家解耦控制。系统能实时自适应炉况状态的变化,提高生产效率,降低电能及电极消耗。实际运行证明该系统具有良好的鲁棒性和实时性。     

一种新型的简易测温系统电路

介绍一种新型的简易测温系统电路。测温系统采用一种新的电流／脉宽转换电路,与常用的测温系统比较,具有测量范围广、精度高、构成简单、成本低廉等优点。