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Implementation of BOC Signal Acquisition Using a DSP/FPGA Board
Yu-Hsuan Chen,Jyh-Ching Juang,Tsai-Ling Kao 한국항해항만학회 2006 한국항해항만학회 학술대회논문집 Vol.2 No.-
Future GNSS signal using BOC modulation brings the advantages of positioning accuracy and multipath rejection. However, the BOC signal has an ambiguous autocorrelation function that complicates the process of acquisition. Three techniques that solve the ambiguous problem are BPSK-like, Sub Carrier Phase Cancellation, and Bump Jumping. In this paper, these methods are implemented by means of a DSP/FPGA board. Moreover, an experiment is conducted to examine and compare the performance of these techniques.
Hsuan Franziska Wu,Tamara G. Amstislavskaya,Pin-Hsuan Chen,Ting-Feng Wu,Yu-Hung Chen,Chun-Ping Jen 한국바이오칩학회 2016 BioChip Journal Vol.10 No.3
Sample preconcentration is an important step that increases the accuracy of subsequent detection, especially for samples with extremely low concentrations. Due to the overlap of electrical double layers in a nanofluidic channel, the concentration polarization effect can be generated by applying an electric field. A nonlinear electrokinetic flow is induced, which results in the fast accumulation of proteins in front of the induced ionic depletion zone, the so-called exclusion- enrichment effect. In this way, a protein sample can be driven by electroosmotic flow and accumulated at a specific location. In the present study, a nanofluidic preconcentrator fabricated with the help of junction gap electric breakdown was integrated with microelectrodes for immunoassay. The preconcentration chip for proteins was fabricated using simple standard soft lithography with a polydimethylsiloxane replica. Human galectin-1 proteins from the cell lysate of T24 cells were concentrated and immunoassayed in the proposed microchip. The capability of the proposed microchip for concentrating multiple proteins from cell lysates and immunoassays after preconcentration was demonstrated. Immunosensing was evaluated by measurements of both fluorescence intensities and impedance, which proved the enhancement of preconcentration for immunoassay.
Design of disk cam mechanisms with a translating follower having symmetrical double-concave faces
Yu-Hsuan Chuang,Kuan-Lun Hsu,Wen-Tung Chang 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.8
This paper presents an analytical approach for designing disk cam mechanisms with an improved translating follower having symmetrical double-concave faces. The doubleconcave faces of such a follower can increase the actual contact area between the cam and the follower. Additionally, during the dwell periods of the follower motion, both the concave faces of the follower can simultaneously contact the cam profile so as to share the carried loading. Such beneficial characteristics can result in a lower level of contact stress between the cam and the follower. Numerical examples are provided to illustrate the nature and the advantage of this improved follower.
Yu-Hsuan Lu,Dan Chen,Sheng-Fu Hsiao,Ching-Jan Chen,Hung-Shou Nien 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
In recent years, the ripple-based constant on-time (RBCOT) control scheme for voltage regulators has been adopted in many applications because of its high efficiency feature under light-load conditions. However, a RBCOT control suffers from output-voltage offset problem. Therefore, an offset correction circuit (OC) is often added to the basic RBCOT scheme to correct the problem. In the OC circuit, there is a RC filter. The size of this RC filter not only affects the circuit stability and converter transient responses but also directly affects the controller chip size/cost. The main focus of the present paper is to investigate the relationship between the RC filter value and the feedback stability so that RC value can be minimized while avoiding circuit instability. A time-domain analysis approach is proposed to model OCRBCOT scheme for a buck converter configuration. Experimental and simulation results are given for verification.
Yu-Li Chen,Kung-Liahng Wang,Min-Yu Chen,Mu-Hsien Yu,Chen-Hsuan Wu,Yu-Min Ke,Yi-Jen Chen,Yin-Yi Chang,Keng-Fu Hsu,Ming-Shyen Yen 대한부인종양학회 2013 Journal of Gynecologic Oncology Vol.24 No.1
Objective: To evaluate the clinical outcome and parameters related to coexisting endometrial carcinoma in women with tissuediagnosed endometrial hyperplasia. Methods: Between January 1991 and December 2009, three hundred and eighty-six patients with the presumptive diagnosis of endometrial hyperplasia were retrieved. Among these, one hundred and twenty-five patients were identified as having coexisting endometrial carcinoma in hysterectomy specimens. The three hundred and eighty-six patients were divided into two groups: the hyperplasia-benign group (261 cases) and the hyperplasia-malignant group (125 cases). Several clinical parameters including age, menopausal status, history of abnormal uterine bleeding, obstetrical history, medical history of diabetes and hypertension, BMI, and preoperative pathologic results were investigated. Results: Age ≥53 (odds ratio [OR], 2.40; 95% confidence interval [CI], 1.26 to 4.57), menopausal status (OR, 2.07; 95% CI, 1.14to 3.76), diabetes history (OR, 7.33; 95% CI, 2.79 to 19.26), abnormal uterine bleeding (OR, 3.99; 95% CI, 1.22 to 13.02), atypical endometrial hyperplasia (OR, 7.38; 95% CI, 4.03 to 13.49), and body mass index ≥27 (OR, 3.24; 95% CI, 1.76 to 5.97) were independent risk factors for prediction of endometrial hyperplasia coexisting with endometrial carcinoma. The diagnostic efficacy of atypical endometrial hyperplasia to predict the endometrial hyperplasia coexisting with endometrial carcinoma was better than or similar to those of other independent factors and combinations of these factors. Conclusion: Coexisting malignancy should be considered when examining endometrial hyperplasia patients with the related risk factors, especially atypical endometrial hyperplasia.
The Influence of Reciprocity on Individual Decisions in a Climate Coalition Experiment
Yu-Hsuan LIN 한국유통과학회 2020 Asian Journal of Business Environment (AJBE) Vol.10 No.2
Purpose: This study examines the impact of individual reciprocal preferences on coalition formation. The reciprocal model considers a player’s own payoff, the player’s perception of others’ payoffs, and others’ perceptions of the player’s payoff. Research design, data and methodology: A reciprocal model is built to illustrate how reciprocity influences individual decisions in a coalition game and its formation. The prediction is examined with experimental evidences from a dictator game and a membership game. Results: The theoretical result suggests that the coalition formation could be unstable due to negative reciprocal kindness. The experimental findings support that negative reciprocal kindness could lead players participating in a coalition, no matter their dominant strategies are. When subjects were essential to make contributions to a coalition, they were more likely to cooperate if they were treated badly. In contrast, when subjects were unnecessary, the reciprocal kindness could enhance cooperative tendencies. Conclusions: This study reveals that the reciprocal behavior could influence individual decisions and reshape the coalition formation. In terms of policy implications, this study has shown that coalition formation could be reshaped by reciprocal prefe rences. Due to the strategic and complicated decision process in an interactive environment, a comprehensive investigation of factors would be required in a climate coalition in practice.
Sustainability and International Environmental Agreements
( Yu Hsuan Lin ) 한국환경경제학회·한국자원경제학회(구 한국환경경제학회) 2015 자원·환경경제연구 Vol.24 No.2
This paper examines the perceptions of sustainability, which is conceptualised as cross-generational social preferences, on the formation of international environmental agreements (IEAs) in a two-stage game in two periods. There are two scenarios are considered: myopic and sustainable development scenarios. The myopic scenario assumes the decision makers only concern the present welfare. Whilst the scenario of sustainable development has two characters: cross-generational fairness and altruism. When both are taken into account, a coalition will be expanded. The numerical example indicates that the marginal cost of the total emissions is the crucial factor for the formation of IEAs. Only when the marginal cost is low, a sustainable system can be succeeded. While, the technological advancement may lead to a more efficient production per unit of emissions, it also encourages countries to emit more in total and have a lower level of welfare. The results confirm the importance of sustainability to IEAs. The lesson learnt from this study is: when decision makers are myopic, the system is unsustainable even if an IEA is formed. Only when the perception of sustainability is considered, the system could be sustainable. Regardless of the existence of IEAs, international environmental conventions shall not neglect the fundamental goal to pursue sustainable development.