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61.
随着高校扩大招生,管理越来越庞杂,向数字化信息化发展是必然趋势,如何将散乱的"信息孤岛"有机地整合起来,以Philips公司的MF1S50非接触式IC卡和RC500模块为基础,并对RC500模块驱动程序进行设计和解析,实现将高校机房管理纳入校园IC卡一卡通管理范畴,提高管理效率。 相似文献
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A methodology for the concentration, detection and enumeration of Salmonella from drinking water by membrane filter technique is described. A single step filtration methodology for enteroviruses and Salmonella was not possible, due to the inactivation of Salmonella at conditions necessary for concentration of enteroviruses, i.e. pH 3.5 and 9.5. Enrichment in selenite cystine broth and incubation at 37°C followed by plating on brilliant green agar provided maximum recovery of Salmonella. Out of 21 drinking water samples in Delhi, India examined during March to May 1991, three were positive for Salmonella. 相似文献
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Siti Hajar Khairuddin Mohd Hilmi Hasan Emilia Akashah P. Akhir Manzoor Ahmed Hashmani 《计算机、材料和连续体(英文)》2022,71(1):717-734
Fuzzy inference system (FIS) is a process of fuzzy logic reasoning to produce the output based on fuzzified inputs. The system starts with identifying input from data, applying the fuzziness to input using membership functions (MF), generating fuzzy rules for the fuzzy sets and obtaining the output. There are several types of input MFs which can be introduced in FIS, commonly chosen based on the type of real data, sensitivity of certain rule implied and computational limits. This paper focuses on the construction of interval type 2 (IT2) trapezoidal shape MF from fuzzy C Means (FCM) that is used for fuzzification process of mamdani FIS. In the process, upper MF (UMF) and lower MF (LMF) of the MF need to be identified to get the range of the footprint of uncertainty (FOU). This paper proposes Genetic tuning process, which is a part of genetic algorithm (GA), to adjust parameters in order to improve the behavior of existing system, especially to enhance the accuracy of the system model. This novel process is a hybrid approach which produces Genetic Fuzzy System (GFS) that helps to enhance fuzzy classification problems and performance. The approach provides a new method for the construction and tuning process of the IT2 MF, based on the FCM outcomes. The result is compared to Gaussian shape IT2 MF and trapezoid IT2 MF generated by the classic GA method. It is shown that the proposed approach is able to outperform the mentioned benchmarked approaches. The work implies a wider range of IT2 MF types, constructed based on FCM outcomes, and an optimum generation of the FOU so that it can be implemented in practical applications such as prediction, analytics and rule-based solutions. 相似文献
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In this study, nine flat-sheet commercially available hydrophobic PTFE membranes were used in desalination by direct contact membrane distillation and their characteristics were investigated under different operating conditions including feed temperature, feed flow rate, cold stream flow rate, and feed concentration. Membrane properties, i.e. pore size, thickness, support layer, and salt rejection were also studied. Moreover, membrane module designs including flow arrangements (co-current, counter-current and tangential) for process liquid and depth both on hot and cold sides were tested experimentally. Finally, the long-term performance of the selected membranes for direct contact membrane distillation as a stand-alone desalination process was investigated. The results indicated that increasing feed temperature, hot feed flow rate, and module depth on the cold side led to increase permeate flux. On the other hand, increasing membrane thickness and module depth on the hot side (at constant flow rate) had negative effects on the flux. The highest permeation flux and salt rejection was achieved when the membranes with a pore size of 0.22 μm were used in the cross-current follow arrangement of hot and cold streams. In addition, the requirements for support layer for a successful DCMD process has been extensively discussed. 相似文献
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膜分离技术处理放射性废水 总被引:2,自引:0,他引:2
介绍了膜技术在中、低浓度放射性废水处理中的研究和应用进展.膜组合技术处理放射性废水净化率可达98%~99.9%、净化因子可达100~1000.指出反渗透、纳滤、超滤、微滤和电渗析是目前应用的主流膜技术,并对其工艺特点作了评述.今后膜技术在核工业放射性废水处理中将获得更广泛的应用. 相似文献
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针对广州国际生物岛再生水工程水质要求高的特点,设计采用CASS与CMF(连续式微滤膜)串联组合工艺,工程规模为1.0×10~4m~3/d.出水执行<城镇污水处理厂污染物排放标准>(GB 18918-2002)的一级A标准和<城市污水再生利用景观环境用水水质>(GB/T 18921-2002)标准.该工程为全地下式设计,介绍了各工艺单元的设计、设备布置及工艺特点. 相似文献
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为了实现定向中波天线阵的小型化,采用现代专业电磁仿真软件FEKO,对常规的中波T型天线进行改进和优化设计使其达到小型化,并以此为天线单元,进行三单元组阵,采用不等幅、不同相馈电技术,从而实现定向中波天线阵的小型化设计,具有一定的工程应用前景。 相似文献