藏灵菇源酵母菌和乳酸菌降胆固醇蛋乳发酵饮料的研制

利用藏灵菇中筛选的马克斯克鲁维酵母菌(Kluyveromyces marxianus) M3、干酪乳杆菌(Lactobacillus casei) KL1、嗜热链球菌(Streptococcus thermoptilus) Tx、乳酸乳球菌乳酸亚种(Lactococcus lactis sub sp.lactis) KS4混合发酵,以鸡蛋和牛奶为原料,研制降胆固醇蛋乳发酵饮料.利用KL1、Tx、KS4这3株乳酸菌进行一次发酵,再利用酵母菌进行二次发酵.采用3因素3水平正交试验优化发酵条件为发酵温度34℃,接种量1％,发酵时间24h.在优化条件下,蛋乳发酵饮料的降低胆固醇率为74.99％,显示藏灵菇源酵母菌M3菌株具有良好的降胆固醇作用.     

Space on Earth: A Virtual Portal Between the Earth and Outer Space

Every time you text or call from your mobile phone, you may be unknowingly providing essential data that is being captured for public or commercial research. Valentina Croci describes how The Senseable City Lab at MIT and the Estonian group Positium LBS with the Department of Geography at the University of Tartu have been developing projects that enable us to sense the city, dynamically mapping social movement. Copyright © 2008 John Wiley & Sons, Ltd.     

Natural Methods of Interaction Or Natural Interaction in the Everyday Digital World

Computers, mobiles and automatised machines are so omnipresent that the means by which we interact with digital devices is now generally regarded as a given. Italian practice iO Agency, though, questions our use of mechanised interfaces and the language that they require us to learn. Valentina Croci explains how iO Agency has developed more natural ways for people to interact with digital environments through physical or tactile ‘triggers’. Copyright © 2008 John Wiley & Sons, Ltd.     

软土中大直径超长群桩位移的实用计算方法

从单桩m法入手,提出了软土中大直径超长群桩位移计算的方法。将单桩分析与承台以及群桩分析结合起来,考虑了底部转角、有效桩长的作用,以及大直径超长群桩受水平力转动所引起的弯曲和压缩的影响。利用Matlab软件,对所推得的公式进行编程,计算验证,讨论了不同桩距和不同桩径时的各种情况。将计算结果代回单桩公式中,可得桩身的位移和应力曲线,整个计算方法成为一个闭合循环的求解过程。以安徽省某长江大桥锚碇基础的群桩为例,选用实际数据进行分析计算,并与三维有限差分法的计算结果进行对比,发现该方法具有较高的实用价值。     

一种新的基于可逆矩阵的具有完整性检验能力的图像加密方案

为了保护图像信息的安全,论文利用组合理论知识,提出一种新的基于可 逆整数矩阵的、具有完整性检验能力的图像加密方案。应用该方案将一个灰度图像加密生成 一个脆弱的噪声密图,解密过程是加密的简单逆过程。密图的完整性可以凭借人类视觉系统 进行检验,不需要任何复杂的计算。当密图遭受恶意篡改时,解密得到一个噪声图,无法得 到原始图像的任何信息。论文加密方案的密钥简单,且密钥空间足够大。理论分析和实验结 果证明了,该方案为图像加密提供了一种高安全性和有效的机制。     

煤炭单位使用智能卡的安全防范

随着信息化高速的发展,各个煤炭单位中一卡通系统应用越来越多,现在许多一卡通系统用的是具有加密RFID芯片的智能卡。但是,随着2008年德国研究员Henry Plotz成功破解了NXP的Mifare经典芯片(非接触智能卡,即平常所说的M1卡)的安全算法。具有加密RFID芯片的智能卡没有原先预想得那么安全。因此,如何应对是今后网络规划师和系统分析人员工作的重点。文章就智能卡的安全问题做一简要阐述。     

基于M2M平台的感知矿山物联网系统构建设想

针对煤矿综合自动化系统存在的问题,提出基于M2M(Machine to Mobile/Man)平台的感知矿山物联网系统设计模型,探讨感知矿山物联网建设的核心问题。建立统一的数据描述标准是感知矿山物联网建设必须解决的问题。     

基于Pro/E的矿用多功能水泵联动阀的设计分析

根据现代矿井自动排水需要,设计一种兼具电动阀、逆止阀和水锤消除器3种功能的矿用多功能水泵联动阀,应用三维软件Pro/Engineer建立矿用多功能水泵联动阀的简化模型,并应用Pro/E Mechanica(M)组件重点对所设计的多功能水泵联动阀阀芯进行静力学分析,为在实验室设计出性能更佳的多功能水泵联动阀提供了参考方法和依据,这对于研究工矿企业排水阀门设备具有重要的指导意义。     

基于GPRS的热量表无线抄表系统设计

介绍了基于GPRS的热量表无线抄表系统,论述了热量表远程抄表系统的组成、功能、特点,这种基于BENQ公司M23模块和Winbond公司W77E58单片机的热量表无线抄表系统成本低廉,性能稳定可靠。     

M (Co,Ni), N and S tridoped carbon nanoplates as multifunctional catalysts for rechargeable Zn-air batteries and water electrolyzers

Exploration of multifunctional non-precious metal catalysts towards oxygen reduction reaction (ORR), oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is very important for many clean energy technologies. Here, two trifunctional catalysts based on M (Co, Ni), N and S tridoped carbon nanoplates (Co/N/S-CNPs and Ni/N/S-CNPs) are reported. Due to the relatively higher catalytic site content, graphitization degree and smaller charge-transfer resistance, the Co/N/S-CNPs catalyst shows higher activity and stability for ORR (onset potential of 0.99 V and half-wave potential of 0.87 V vs. RHE (reversible hydrogen electrode)), OER (overpotential at 10 mA cm^?2 of 0.37 V) and HER than the Ni/N/S-CNPs catalyst. Furthermore, when constructed with the Co/N/S-CNPs and commercial 20 wt% Pt/C + Ir/C cathodes, respectively, Zn-air battery (ZnAB) based on the Co/N/S-CNPs cathode displays better performance, including a higher power density of 96.0 mW cm^?2 and cycling stability at 5 mA cm^?2. In addition, an alkaline electrolyzer assembled with the Co/N/S-CNPs catalyst as a bifunctional catalyst can reach 10 mA cm^?2 at 1.65 V for overall water splitting and maintain excellent stability even after cycling for 12 h. The present work proves the potential of the Co/N/S-CNPs catalyst for many clean energy devices.