7,132 research outputs found
Stability analysis of grey compromise programming and its application to watershed land-use planning
No full text[[abstract]]Multiple conflicting objectives characterize the current water resources management systems. In particular, the conflict between environmental protection of reservoir water quality and economic development by different uses of land within the reservoir watershed is a problem that receives wide attention in many developing countries. The optimal balance between carrying capacity of watershed land-use and assimilative capacity of reservoir water quality remains unclear. However, the inherent uncertainties of both environmental and economic goals and parameter values may result in additional difficulties in public decision making. This paper presents a new methodology-the grey compromise programming (GCP) method-in which the parameter uncertainties in the optimization process are specifically considered as interval numbers and the related stability theory is proved as well. The case study is drawn from the optimal planning of land-use programme in the Tweng-Wen reservoir watershed in Taiwan.[[note]]SC
Design and Development of SC-cut Quartz Crystal Microbalance with Enabled Electrochemistry Detection Capability
No full text本研究結合研究團隊所提出之新式電化學交流檢測技術，並且結合石英微天平振盪器，與SC-cut石英晶體切片之技術，成功發展出SC-EQCM，因此取得同時量測電化學(電流、血糖濃度)、SC-cut B模態量取樣本溫度變化、SC-cut C模態量取樣本黏滯性與質量特性等三種主要參數的量測能力。於電化學方面，本論文成功証明了於QCM上可以使用弦波交流供電或直流供電來做電化學反應，而此反應又不會影響到QCM的量測。而在QCM量測上更發展出一種新系統，利用SC- cut 石英晶體之特性，可不用外加溫度感測器來量取自我溫度，在實驗中更建立了SC-cut B模態溫度曲線資料庫，並且利用簡單的酸鹼中和實驗驗証了系統的多變數量測能力。
最後在整合SC-EQCM量測系統中，設計出兩種不同的白金電極探針(流道式與滴定式)，並且利用LabVIEW的程式成功設計出可以同量測三種參數的人機介面，在電化學方面確認出電流與不同濃度葡萄糖呈現線性關係，而B 模態在不同濃度中可以檢測出氧化還原現象，而C模態則可以量測到黏滯性的關係。A SC-EQCM has been developed in this thesis by integrating a dual-mode SC-quartz and a Electrochemistry detection capabilities. The SC-EQCM depicts that SC-quartz can use B-mode signals as a self- temperature sensor to achieve a - 550HzΔf/°C linearity, and can use C-mode signals as a mass (viscosity..) sensor. In addition, the Electrochemistry sub-system, which was demonstrated to integrate well with the QCM as its input AC or AC ride on DC signals will not influence QCM signals, provides the newly developed system with many new found biochemistry detection capabilities.
In SC-EQCM experiment, what was equipped with two platinum electrode, used LabVIEW to measure the B-mode and the C-mode frequency and electric current simultaneously. Experimental results indicated that the current is linearly proportional the concentration of glucose, the B-mode frequency can measure the redox phenomenon, and the C-mode frequency can detect the viscosity variations.致謝 …………………i
中文摘要 …………………ii
Abstract …………………iii
第1章 研究背景 1
1.1研究動機 1
1.2文獻回顧 2
1.3論文架構 6
第2章 QCM石英微天平震盪器之原理與設計 7
2.1 壓電石英晶體 7
2.1.1壓電效應與壓電性 7
2.1.2石英晶體特性 7
2.2壓電晶片的切型和定向 8
2.3壓電晶片的溫度特性 10
2.3.1壓電晶片的溫度特性方程式 10
2.3.2零溫度係數的切型 11
2.4 AT cut 介紹 13
2.4.1 AT cut 的優缺點 13
2.4.2 Beat frequency 14
2.5 SC cut 介紹 16
2.5.1 SC cut優缺點及切型 16
2.5.2 SC cut 模態特性之介紹 19
2.6 QCM理論模型 22
2.6.1石英晶體的振動型式 22
2.6.2 Sauerbrey及Kanazawa方程式 24
2.6.3振盪電路 28
2.6.4溫度補償振盪電路 30
2.6.5等效電路 33
2.6.6壓電振子的振子參數 36
2.8 EQCM 原理 39
2.8.1基本電化學原理 39
2.8.2 質傳效應 (mass transfer effects ) 40
2.8.3計時安培測定法 41
2.7 ANSYS 44
第3章 實驗架構與實驗步驟 45
3.1實驗儀器與QCM機構 45
3.3實驗藥品 47
3.2 SC cut 溫度曲線 48
3.2.1A B C 三種模態 48
3.2.2建立SC-cut溫度曲線 49
3.2酸鹼中和 51
3.3 EQCM 實驗架構 53
3.3.1 LabVIEW人機介面 53
3.3.2 白金電極 54
3.3.3 EQCM 完整實驗架構 56
3.3.4 EQCM實驗步驟 57
第4章 實驗結果 58
4.1 SC-cut頻率溫度曲線 58
4.2溫度效應與質量效應於B、C模態上 63
4.2酸鹼中和實驗 64
4.3 SC-EQCM 69
第5章 結論與未來展望 74
5-1結論 74
5-2未來展望 75
參考文獻 …………………76
附錄 …………………7
Synthesis of the N(CH2CH2N=CH(o-C6H4)PPh2)(3) ligand and its complexation with tungsten carbonyls to form a 47-membered cryptand-like metallatricycle
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SC author and illustrator Kate Salley Palmer signing book
No full textPhotograph of SC author and illustrator Kate Salley Palmer signing boo
Book signing by SC author and illustrator Kate Salley Palmer
No full textPhotograph of Book signing by SC author and illustrator Kate Salley Palme
High-resolution clean-sc
No full textIn this paper a high-resolution extension of CLEAN-SC is proposed: HR-CLEAN-SC. Where CLEAN-SC uses peak sources in “dirty maps” to define so-called source components, HR-CLEAN-SC takes advantage of the fact that source components can likewise be derived from points at some distance from the peak, as long as these “source markers” are on the main lobe of the Point Spread Function (PSF). This is very useful when sources are closely spaced together, such that their PSFs interfere. Then, alternative markers can be sought in which the relative influence by PSFs of other source positions is minimised. For those markers the source components better agree with the actual sources, which allows for better estimation of their locations and strengths. This paper outlines the theory needed to understand this approach and discusses applications to 2D and 3D microphone array simulations with closely spaced sources
A practical authentication protocol with anonymity for wireless access networks
No full text[[abstract]]The use of anonymous channel tickets was proposed for authentication in wireless environments to provide user anonymity and to probably reduce the overhead of re-authentications. Recently, Yang et al. proposed a secure and efficient authentication protocol for anonymous channel in wireless systems without employing asymmetric cryptosystems. In this paper, we will show that Yang et al.'s scheme is vulnerable to guessing attacks performed by malicious visited networks, which can easily obtain the secret keys of the users. We propose a new practical authentication scheme not only reserving the merits of Yang et al.'s scheme, but also extending some additional merits including: no verification table in the home network, free of time synchronization between mobile stations and visited networks, and without obsolete anonymous tickets left in visited networks. The proposed scheme is developed based on a secure one-way hash function and simple operations, a feature which is extremely fit for mobile devices. We provide the soundness of the authentication protocol by using VO logic. Copyright (C) 2010 John Wiley & Sons, Ltd.[[note]]SC
SC author and illustrator Kate Salley Palmer talking to event attendees
No full textPhotograph of SC author and illustrator Kate Salley Palmer talking to Rita Lewi
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