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Scattering Phase Correction for Semiclassical Quantization Rules in multi-Dimensional Quantum Systems

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Communications in Theoretical Physics 2010年第2期53卷 250-256页

作者： HUANG Wen-min mOU chung-Yu CHANG Cheng-Hung Department of Physics National Tsing-Hua University Hsinchu Taiwan physics Division National Center for Theoretical Sciences Hsinchu Taiwan Institute of Physics National Chiao Tung University Hsinchu Taiwan Institute of mathematical modeling and Scientific Computing National Chiao Tung University Hsinchu Taiwan

While the scattering phase for several one-dimensional potentials can be exactly derived, less is known in multi-dimensional quantum systems. This work provides a method to extend the one-dimensional phase knowledge to multi-dimensional quantization rules. The extension is illustrated in the example of Bogomolny＇s transfer operator method applied in two quantum wells bounded by step potentials of different heights. This generalized semiclassical method accurately determines the energy spectrum of the systems, which indicates the substantial role of the proposed phase correction. Theoretically, the result can be extended to other semiclassical methods, such as Gutzwiller trace formula, dynamical zeta functions, and semielassical Landauer Buttiker formula. In practice, this recipe enhances the applicability of semiclassical methods to multi-dimensional quantum systems bounded by general soft potentials.

关键词： Bogomolny's transfer operator semiclassical quantization rules quantum chaos

Comparison of the clinical efficacy of medical treatment of symptomatic benign prostatic hyperplasia between normal and obese patients

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Asian Journal of Andrology 2011年第5期13卷 728-731页

作者： Seung Hwan Lee Cheol Young Oh Kyung Kgi Park mutt Su chung Se Jeong Yoo Byung Ha chung Department of Urology Yonsei University Health System Seoul Korea Department of Urology Hallym University Anyang 431-070 Chuncheon

We aimed to investigate the difference in efficacy of medical treatment of symptomatic benign prostatic hyperplasia （BPH） between normal and obese patients with BPH; obesity was determined by either body mass index （BmI） or waist circumference （WC）. In this 12-week prospective observational study, a total of 175 patients aged ≥40 years with International Prostate Symptom Scores （IPSS） ≥12 points and prostate volume≥20 ml were prospectively enrolled. The patients were divided into two groups according to BmI or WC. Patients received the doxazosin gastrointestinal therapeutic system （GITS） at a dose of 4 mg once per day for 12 weeks. The changes from baseline in the IPSS, maximal urinary flow rate （Qmax）, post-void residual volume, quality of life （QoL） scores and adverse events （AEs） were analysed. Of the 175 enrolled patients, 132 completed the study. Sixty-seven patients had BmI 〉23 kg m-2, and 43 had WC 〉90 cm. Obese patients represented by WC 〉90 cm or BmI≥ 23 kg m-2 had a significantly greater prostate volume compared with non-obese patients at baseline. Total IPSS was significantly higher in the WC 〉90 cm group compared to the WC ≤ 90 cm group. Total I PSS was positively correlated with prostate volume （P=-0.031） and WC （P=0.045）. All groups showed significant improvements in total IPSS and QoL at 12 weeks. However, the improvement of total IPSS was greater in the high-BmI and high-WC groups. The most frequent AE was dizziness （n= 13）, and it was significantly lower in the obese BPH patients. Obesity was associated with increased prostate volume and lower urinary tract symptoms. Alpha-blockers appear to be efficacious for controlling symptoms, especially in obese men.

关键词： Alpha-blocker benign prostatic hyperplasia body mass index prostate waist circumference

A case study of a Kuroshio main path cut-off event and impacts on the South China Sea in fall-winter 2013–2014

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Acta Oceanologica Sinica 2019年第4期38卷 12-19页

作者： Quanan Zheng chung-Ru Ho Lingling Xie mingming Li Department of Atmospheric and Oceanic Science University of Maryland Guangdong Key Laboratory of Coastal Ocean Variability and Disaster Prediction Guangdong Ocean University Department of marine Environmental Informatics National Taiwan Ocean University

This study examines a Kuroshio main path(KmP) cut-off event east of Taiwan Island occurred in fall-winter2013–2014 and its impacts on the South China Sea(SCS) by analyzing satellite altimetry and mooring observations. Satellite altimeter sea level anomaly(SLA) images reveal a complete process that a huge cyclonic eddy(CE) from the Pacific collided with the Kuroshio and the western boundary from 15 October 2013 to 15 January 2014. mooring observations evidenced that the Kuroshio upper ocean volume transport was cut off more than 82% from 17×106 m^3/s in September to 3×106 m^3/s in November 2013. The KmP cut-off event caused the Kuroshio branching and intruding into the SCS and strengthened the eddy kinetic energy in the northern SCS west of the Luzon Strait. Using the total momentum as a dynamic criterion to determine the role of eddy collision with the Kuroshio reasonably explains the KmP cut-off event.

关键词： KmP cut-off event eddy kinetic energy dynamic criterion South China Sea

Real-Time Human Body motion Capturing System

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Journal of Electronic Science and Technology 2017年第2期15卷 115-122页

作者： chung-Lin Huang Chien-Wei Hsu Zhi-Ren Tsai Department of m-Commerce and multimedia Applications Asia UniversityTaichung 41354 mediaTek Inc.Hsinchu department of computer science and information engineering Asia UniversityTaichung 41354

This paper proposes a human body motion capturing system using the depth images. It consists of three processes to estimate the human pose parameters. First, we develop a pixel-based body part classifier to segment the human silhouette into different body part sub-regions and extract the primary joints. Second, we convert the distribution of the joints to the feature vector and apply the regression forest to estimate human pose parameters. Third, we apply the temporal constraints mechanism to find the best human pose parameter with the minimum estimation error. In experiments, we show that our system can operate in real-time with sufficient accuracy.

关键词： Index Terms-motion capturing random forest classifier regression forest.

Pheromone 3kPZS evokes context-dependent serotonin sexual dimorphism in the brain of the sea lamprey (Petromyzon marinus)

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Integrative Zoology 2015年第1期10卷 91-101页

作者： Yuwen chung-DAVIDSON Huiyong WANG Anne mSCOTT Weiming LI Department of Fisheries and Wildlife Michigan State UniversityEast LansingMIUSA

mature male sea lampreys(Petromyzon marinus)release a sex pheromone,3-keto-petromyzonol sulfate(3kPZS),that induces sexually dimorphic behavioral responses in ***,the neural mechanism of such responses is mostly *** examined the neurotransmitter serotonin(5-hydroxytryptamine,5-HT)and the expression of 5-HT1A receptors in the forebrain and brainstem of sea lamprey exposed to the vehicle(0.91 ppm methanol)or 10−10 m 3kPZS for 2 h using high performance liquid chromatography-electrospray ionization tandem mass spectrometry,immunohistochemistry and real-time quantitative polymerase chain *** to 3kPZS for 2 h increased 5-HT concentration in the forebrain of adult females,whereas 5-HT was not detected in the forebrain of adult *** the contrary,3kPZS exposure decreased 5-HT concentration in the brainstem of adult females and had no effect in adult *** exposure evoked context-dependent sexual dimorphism in brain 5-HT1A receptor immunoreactivity,but had no effect on 5-HT1A mRNA concentrations in the brain with 2 h exposure *** appears that in sea lamprey pheromone 3kPZS affects the 5-HT system in the brain in a context-dependent,sexually dimorphic manner.

关键词： 5-HT1A receptor liquid chromatography-electrospray ionization tandem mass spectrometry motor output real-time quantitative polymerase chain reaction

How To make Christmas Cookies

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空中英语教室（初级版．大家说英语） 2020年第12期 14-15,51页

作者： Linda m chung 不详

hw Wuch Is That iiii Dolkio?

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空中英语教室（初级版．大家说英语） 2020年第12期 40-41,56页

作者： Linda m chung 不详

Design, Synthesis and Ring-Opening Properties of a New Bipyridine Fused Rhodamine-Like Chelating Ligand and the Related Transition metal Complexes

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Chinese Journal of Chemistry 2021年第6期39卷 1659-1666页

作者： Zhiyuan Qian Yukun Cheng Shunan Zhao Keith man-chung Wong Department of Chemistry Southern University of Science and TechnologyNo.1088Tangchang BoulevardNanshan District，ShenzhenGuangdong 518055China

A new bipyridine fused rhodamine-like chelating ligand and the corresponding transition metal complexes of platinum(Ⅱ)and iridi-um(Ⅲ)have been designed,synthesized and structurally characterized by X-ray *** photophysical properties and acid-or metal ion-promoted spirocarbon ring-opening properties have been *** platinum(Ⅱ)and iridium(Ⅲ)complexes show a drastic color change in solution with Hg^(2+) ions and emergency of an absorption band at around 450-600 nm,assignable to the absorption band of the ring-opened rhodamine-like *** platinum(Ⅱ)complex was suggested to undergo dissociation with Hg^(2+) ion,based on the corresponding absorption titration *** titration studies of iridium(Ⅲ)complexes were found to suffer from the quenching process,probably due to the presence of a lower-lying non-emissive excited state from the ring-opened form of ligand.

关键词： Rhodamine Transition metals Sensor Luminescence Bipyridine

Enhancing the graphene photocurrent using surface plasmons and a p-n junction

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Light(Science & Applications) 2020年第1期9卷 793-802页

作者： Di Wang Andres E.Llacsahuanga Allcca Ting-Fung chung Alexander V.Kildishev Yong P.Chen Alexandra Boltasseva Vladimir m.Shalaev School of Electrical and Computer Engineering Purdue UniversityWest LafayetteIN 47907USA Birck Nanotechnology Center Purdue UniversityWest LafayetteIN 47907USA Department of Physics and Astronomy Purdue UniversityWest LafayetteIN 47907USA Purdue Quantum Science and Engineering Institute(PQSEI) Purdue UniversityWest LafayetteIN 47907USA

The recently proposed concept of graphene photodetectors offers remarkable properties such as unprecedented compactness,ultrabroadband detection,and an ultrafast response ***,owing to the low optical absorption of pristine monolayer graphene,the intrinsically low responsivity of graphene photodetectors significantly hinders the development of practical *** address this issue,numerous efforts have thus far been made to enhance the light–graphene interaction using plasmonic *** approaches,however,can be significantly advanced by leveraging the other critical aspect of graphene photoresponsivity enhancement-electrical junction *** has been reported that the dominant photocarrier generation mechanism in graphene is the photothermoelectric(PTE)***,the two energy conversion mechanisms involved in the graphene photodetection process are light-to-heat and heat-to-electricity *** this work,we propose a meticulously designed device architecture to simultaneously enhance the two conversion ***,a gap plasmon structure is used to absorb a major portion of the incident light to induce localized heating,and a pair of split gates is used to produce a p-n junction in graphene to augment the PTE current *** gap plasmon structure and the split gates are designed to share common key components so that the proposed device architecture concurrently realizes both optical and electrical *** experimentally demonstrate the dominance of the PTE effect in graphene photocurrent generation and observe a 25-fold increase in the generated photocurrent compared to the un-enhanced *** further photocurrent enhancement can be achieved by applying a DC bias,the proposed device concept shows vast potential for practical applications.

关键词： electrical plasmon hinder