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International Journal of Minerals,Metallurgy and Materials 2009年第1期16卷 124-127页

作者： Ying-chieh lee wei-hua Lu Su-hei Wang Chai-wei Lin Department of Material Engineering Pingtung University of Technology ＆ Science China Taipei Electronic Ceramics Research Center Yageo Kaohsiung 811 China Taipei

The effect of SiO2 doping on the sintering behavior, microstructure, and dielectric properties of BaTiO3-based ceramics has been investigated. Silica was added to the BaTiO3-based powder prepared by the solid state method with 0.075mol%, 0.15mol%, and 0.3mol%, respectively. The SiO2-doped BaTiO3-based ceramic with high density and uniform grain size were obtained, which were sintered in reducing atmosphere. A scanning electron microscope, X-ray diffraction, and LCR meter were used to determine the microstructure as well as the dielectric properties. SiO2 can form a liquid phase belonging to the ternary system of BaO-TiO2-SiO2, leading to the formation of BaTiO3 ceramics with high density at a lower sintering temperature. The SiO2-doped BaTiO3-based ceramics can be sintered to a theoretical density higher than 95% at 1220℃ with a soaking time of 2 h. The dielectric constants of the sample with 0.15mol% SiO2 addition sintered at 1220℃ is about 9000. Doping with a small amount of silica can improve the sintering and dielectric properties of BaTiO3-based ceramics.

关键词： barium titanate multilayer ceramic capacitor (MLCC) reducing atmosphere dielectric properties

Utility of droplet digital polymerase chain reaction for studying somatic mosaicism:brain malformations and beyond

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Neural Regeneration Research 2023年第11期18卷 2389-2390页

作者： wei Shern lee Paul J.Lockhart Bruce Lefroy Centre Murdoch Children’s Research InstituteParkvilleVICAustralia Department of Paediatrics The University of MelbourneParkvilleVICAustralia

Somatic variants and how to find them:One major challenge in studying somatic mosaicism is the low abundance of potentially pathogenic somatic variant(s).Unlike inherited germline variants,which are essentially present in all cells,pathogenic somatic variants only exist in a subset of cells and may be present at very low (<1%)variant allele frequency (VAF).Despite the low VAF,these somatic variants are disease-relevant and considered *** the context of focal brain malformations,which constitute a frequent cause of drug-resistant focal epilepsy,a pathogenic somatic mammalian ta rget of rapamycin (MTOR)variant with a VAF of 0.3%has been described(Baldassari et al.,2019).The identification of pathogenic somatic variants has importa nt implications both clinically and biologically.

关键词： epilepsy beyond

Focusing phenomenon and near-trapped modes of SH waves

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Earthquake Engineering and Engineering Vibration 2016年第3期15卷 477-486页

作者： Jeng-Tzong Chen Jia-wei lee Ya-Ching Tu Department of Harbor and River Engineering Taiwan Ocean University Department of Mechanical and Mechatronic Engineering Taiwan Ocean University

In this study, the null-field boundary integral equation method （BIEM） and the image method are used to solve the SH wave scattering problem containing semi-circular canyons and circular tunnels. To fully utilize the analytical property of Circular geometry, the polar coordinates are used to expand the closed-form fundamental solution to the degenerate kernel, and the Fourier series is also introduced to represent the boundary density. By collocating boundary points to match boundary condition on the boundary, a linear algebraic system is constructed. The unknown coefficients in the algebraic system can be easily determined. In this way, a semi-analytical approach is developed. Following the experience of near-trapped modes in water wave problems of the full plane, the focusing phenomenon and near-trapped modes for the SH wave problem of the half-plane are solved, since the two problems obey the same mathematical model. In this study, it is found that the SH wave problem containing two semi-circular canyons and a circular tunnel has the near-trapped mode and the focusing phenomenon for a special incident angle and wavenumber. In this situation, the amplification factor for the amplitude of displacement is over 300.

关键词： SH wave null-field boundary integral equation method degenerate kernel focusing, near-trapped mode

Factors Influencing the Spatial Variability of Air Temperature Urban Heat Island Intensity in Chinese Cities

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Advances in Atmospheric Sciences 2024年第5期41卷 817-829页

作者： Heng LYU wei WANG Keer ZHANG Chang CAO wei XIAO Xuhui lee Key Laboratory of Meteorological Disaster Ministry of Education(KLME)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)/Key Laboratory of Ecosystem Carbon Source and SinkChina Meteorological Administration(ECSS-CMA)/Jiangsu Key Laboratory of Agricultural MeteorologyNanjing University of Information Science&TechnologyNanjing 210044China Key Laboratory of Urban Meteorology China Meteorological AdministrationBeijing 100089China School of the Environment Yale UniversityNew HavenCT 06511USA

Few studies have investigated the spatial patterns of the air temperature urban heat island(AUHI)and its controlling *** this study,the data generated by an urban climate model were used to investigate the spatial variations of the AUHI across China and the underlying climate and ecological drivers.A total of 355 urban clusters were *** performed an attribution analysis of the AUHI to elucidate the mechanisms underlying its *** results show that the midday AUHI is negatively correlated with climate wetness(humid:0.34 K;semi-humid:0.50 K;semi-arid:0.73 K).The annual mean midnight AUHI does not show discernible spatial patterns,but is generally stronger than the midday *** urban–rural difference in convection efficiency is the largest contributor to the midday AUHI in the humid(0.32±0.09 K)and the semi-arid(0.36±0.11 K)climate *** release of anthropogenic heat from urban land is the dominant contributor to the midnight AUHI in all three climate *** rural vegetation density is the most important driver of the daytime and nighttime AUHI spatial variations.A spatial covariance analysis revealed that this vegetation influence is manifested mainly through its regulation of heat storage in rural land.

关键词： air temperature urban heat island spatial variations biophysical drivers Chinese cities climate model

Multi-Agent Deep Reinforcement Learning for Cross-Layer Scheduling in Mobile Ad-Hoc Networks

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China Communications 2023年第8期20卷 78-88页

作者： Xinxing Zheng Yu Zhao Joohyun lee wei Chen Department of Electronic Engineering and Beijing National Research Center for Information Science and Technology Tsinghua UniversityBeijing 100084China Department of Electrical and Electronic Engineering Hanyang UniversityAnsan 15588South Korea

Due to the fading characteristics of wireless channels and the burstiness of data traffic,how to deal with congestion in Ad-hoc networks with effective algorithms is still open and *** this paper,we focus on enabling congestion control to minimize network transmission delays through flexible power *** effectively solve the congestion problem,we propose a distributed cross-layer scheduling algorithm,which is empowered by graph-based multi-agent deep reinforcement *** transmit power is adaptively adjusted in real-time by our algorithm based only on local information(i.e.,channel state information and queue length)and local communication(i.e.,information exchanged with neighbors).Moreover,the training complexity of the algorithm is low due to the regional cooperation based on the graph attention *** the evaluation,we show that our algorithm can reduce the transmission delay of data flow under severe signal interference and drastically changing channel states,and demonstrate the adaptability and stability in different *** method is general and can be extended to various types of topologies.

关键词： Ad-hoc network cross-layer scheduling multi agent deep reinforcement learning interference elimination power control queue scheduling actorcritic methods markov decision process

Optical Fiber Lasers and All Solid-State Passively Modulated Microchip Lasers

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光学学报 2003年第S1期23卷 501-502页

作者： Junewen Chen Pie-Yau chien Yu-Ting lee Institute of Mechanical and Aerospace Engineering Chung Hua University Hsin-Chu Taiwan 30053Asia Photonics Technology Co. INC. No. 98 An-Ho Road Tantz Shiang Taichung Hsien Taiwan 427Asia Photonics Technology Co. INC. No. 98 An-Ho Road Tantz Shiang Taichung Hsien Taiwan 427

Erbium fiber lasers of continuous mode outputs and of pulsed picosecond and sub-picosecond pulses train are reported. Compact all solid state passively modulated microchip lasers are also developed to the same degree.

关键词： mode as of be in YAG Optical Fiber Lasers and All Solid-State Passively Modulated Microchip Lasers GaAs have

Current status in the treatment options for esophageal achalasia

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World Journal of Gastroenterology 2013年第33期19卷 5421-5429页

作者： Seng-Kee Chuah chien-Hua Chiu wei-Chen Tai Jyong-Hong lee Hung-I Lu Chi-Sin Changchien Ping-Huei Tseng Keng-Liang Wu Gastrointestinal Motility Unit Division of HepatogastroenterologyKaohsiung Chang Gung Memorial Hospitaland Chang Gung University College of Medicine Division of General Medicine Department of MedicineKaohsiung Chang Gung Memorial Hospitaland Chang Gung University College of Medicine Digestive Disease Center Department of Medical ResearchShow-Chwan Memorial Hospital Division of Thoracic and Cardiovascular Surgery Kaohsiung Chang Gung Memorial Hospital Department of Internal Medicine Graduate Institute of Clinical MedicineNational Taiwan University Hospital and College of MedicineNational Taiwan University

Recent advances in the treatment of achalasia include the use of high-resolution manometry to predict the outcome of patients and the introduction of peroral endoscopic myotomy(POEM).The first multicenter randomized,controlled,2-year follow-up study conducted by the European Achalasia Trial group indicated that laparoscopic Heller myotomy(LHM)was not superior to pneumatic dilations(PD).Publications on the long-term success of laparoscopic surgery continue to *** addition,laparoscopic single-site surgery is applicable to advanced laparoscopic operations such as LHM and anterior *** optimal treatment option is an ongoing matter of *** this review,we provide an update of the current progress in the treatment of esophageal *** new conclusive data prove otherwise,LHM is considered the most durable treatment for achalasia at the expense of increased reflux-associated ***,PD is the first choice for non-surgical treatment and is more *** PD according to an"on-demand"strategy based on symptom recurrence can achieve long-term *** making should be based on clinical evidence that identifies a subcategory of patients who would benefit from specific treatment *** has shown promise but its long-term efficacy and safety need to be assessed further.

关键词： Esophageal achalasia Endoscopic pneumatic dilations Botulinum injection Peroral endoscopic myotomy Minimally invasive Heller myotomy

Serum monoterpene levels, glucose homeostasis, lipid profiles, and metabolic syndrome in adults: NHANES, 2013–2014

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Emerging Contaminants 2024年第2期10卷 33-39页

作者： wei-Jie Wang Yu-Ling Lin Chikang Wang chien-Yu Lin Division of Nephrology Department of Internal MedicineTaoyuan General HospitalMinistry of Health and WelfareTaoyuan330TaiwanChina Department of Biomedical Engineering Chung Yuan Christian UniversityTaoyuan300TaiwanChina Department of Nephrology Hsinchu Cathay General HospitalHsinchu300TaiwanChina Department of Healthcare Management Yuanpei University of Medical TechnologyHsinchu300TaiwanChina Department of Environmental Engineering and Health Yuanpei University of Medical TechnologyHsinchu300TaiwanChina Department of Internal Medicine En Chu Kong HospitalNew Taipei City237TaiwanChina School of Medicine Fu Jen Catholic UniversityNew Taipei City242TaiwanChina

Monoterpenes are organic compounds which have been studied for their medicinal ***,the association between monoterpene exposure and metabolic parameters in humans is *** investigated the connection between three specific monoterpenes(α-pinene,β-pinene,and limonene),glucose homeostasis biomarkers,lipid profiles,and metabolic syndrome(MS)in 1627 adults from the National Health and Nutrition Examination Survey(NHANES)2013–*** found serum levels ofα-pinene andβ-pinene were positively associated with fasting glucose,total cholesterol,triglyceride,and apolipoprotein *** addition,increased levels of limonene andΣmonoterpene(sum of three monoterpene chemicals)were linked to higher insulin,β-cell function,total cholesterol,low density lipoprotein cholesterol(LDL-C),triglycerides,and apolipoprotein *** with all three monoterpenes above the 50th percentile had notably higher values for total cholesterol and triglycerides compared to those with all three monoterpenes below the 50th percentile(P for trend<0.001).Regarding MS,higher serum concentrations ofα-pinene were linked to an increased risk of high-density lipoprotein cholesterol(HDL-C)insufficiency and *** concentrations ofβ-pinene were associated with a higher prevalence of ***,increased levels of limonene andΣmonoterpene were connected to a higher risk of MS,larger waist circumference,low HDL-C,hypertriglyceridemia,and higher blood pressure according to MS *** conclusion,serum monoterpenes levels were linked to glucose regulation,lipid profiles,and indicators of *** studies are necessary to clarify the potential causal relationships.

关键词： Glucose homeostasis Lipid profiles Monoterpenes National health and nutrition examination survey(NHANES)

STRESS INTENSITY FACTOR OF AN ANTI-PLANE CRACK PARALLEL TO THE WEAK/MICRO-DISCONTINUOUS INTERFACE IN A BI-FGM COMPOSITE

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Acta Mechanica Solida Sinica 2008年第1期21卷 34-43页

作者： Yong-Dong Li wei Tan Kang Yong lee Department of Mechanical Engineering Academy of Armored Force Engineering No.21 Du Jia Kan Chang Xin Dian Beijing 100072 China School of Mechanical Engineering Yonsei University Seoul 120-749 South Korea

The problem considered is a mode Ⅲ crack lying parallel to the interface of an exponential-type functional graded material （FGM） strip bonded to a linear-type FGM substrate with infinite thickness. By applying the Fourier integral transform, the problem was reduced as a Cauchy singular integral equation with an unknown dislocation density function. The collocation method based on Chebyshev polynomials proposed by Erdogan and Gupta was used to solve the singular integral equation numerically. With the numerical solution, the effects of the geometrical and physical parameters on the stress intensity factor （SIF） were analyzed and the following conclusions were drawn：（a） The region affected by the interface or free surface varies with the material rigidity, and higher material rigidity will lead to bigger affected region. （b） The SIF of the crack in the affected region and parallel to the micro-discontinuous interface is lower than those of the weak discontinuous cases. Reducing the weak-discontinuity of the interface will be beneficial to decrease the SIF of the interface-parallel crack in the region affected by the interface. （c） The effect of the free surface on SIF is more remarkable than that of the interface, and the latter is still more notable than that of the material rigidity. When the effects of the interface and free surface are fixed, increase of the material rigidity will enhance the value of SIF.

关键词： bi-FGM composite mode Ⅲ crack stress intensity factor weak/mico discontinuity,the Cauchy singular integral equation

Ilmenite:Properties and photodegradation kinetic on Reactive Black 5 dye

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Chinese Chemical Letters 2017年第7期28卷 1613-1618页

作者： Ru-Bin lee Joon-Ching Juan Chin-wei Lai Kian-Mun lee Nanotechnology&Catalysis Research Centre(NANOCAT) Institute of Graduate Studies(IPS)University of Malaya50603 Kuala LumpurMalaysia

Ilmenite is natural mineral ore made up with titanium and iron mineral; including small portion of magnesium and manganese. To the best of our knowledge, photo-degradation of Reactive Black 5 dye（RB5） using ilmenite under solar irradiation is still lacking. In the present study, the physicochemical properties of ilmenite were characterized by using X-ray diffraction（XRD）, Scanning electron microscope（SEM）, BET and Raman Spectroscopy. Based on our results obtained, 73% solar-driven photo-degradation of RB 5 was successfully obtained when the catalyst loading increased up to 2.0 g/L for 20 min. In general,the photo-degradation of RB 5 by ilmenite followed first-order kinetics. The p H had a significant effect,with the most rapid degradation occurring at p H less than 7.

关键词： Ilmenite Photo-degradation Reactive Black 5 Solar irradiation Photo-catalytic