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Reactive processing of poly(lactic acid)/poly(ethylene octene) blend film with tailored interfacial intermolecular entanglement and toughening mechanism

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Journal of Materials Science & Technology 2022年第3期98卷 186-196页

作者： Wenjun He lin Ye Phil Coates fin Caton-Rose Xiaowen Zhao State Key Laboratory of Polymer Materials Engineering of China Polymer Research Institute of Sichuan UniversityChengdu 610065China School of Engineering Design and TechnologyUniversity of BradfordBradfordUK

In order to obtain a uniform and effectively toughened poly(lactic acid)film by blending with low content of poly(ethylene octene)(POE)with high elasticity,the tailored interfacial intermolecular interaction and entanglement between the two phases of the PLA/POE blend was innovatively constructed via the facile reactive melt blending process through the reaction of the epoxy/anhydride groups grafted on the POE chains with the end groups of PLA chains(PLA/GPOE-MPOE).It was observed that POE domains were embedded tightly in PLA matrix with a fuzzy interface and abundant interface transition area,and the impact fractured surface of the blend showed an obvious plastic deformation with less occurrence of fibrillation of PLA matrix or interfacial *** with neat PLA and directly blended PLA/POE blends,the PLA/GPOE-MPOE blend exhibited much higher complex viscosity/storage modulus,much lower tanδvalues in the terminal region,and obvious strain-hardening *** deviation in viscoelastic behavior of PLA/GPOE-MPOE from linear PLA indicated the enhanced molecular entanglement between the long-branched chains,resulting in an enhancement of the stretching ability during biaxial drawing of the *** PLA/GPOE-MPOE films with draw ratio as high as 7×7 were obtained through biaxial stretching,which showed much higher tensile strength and the elongation at break than that of neat PLA and PLA/POE *** work provides a facile method for fabricating toughening PLA films with application potentials.

关键词： Poly(lactic acid)/poly(ethylene octene)(PLA/POE)blend film Reactive processing Tailored interfacial intermolecular interaction Long-chain branched structure Toughening mechanism

Effect of boundary conditions on downstream vorticity from counter-rotating swirlers

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Chinese Journal of Aeronautics 2015年第1期28卷 34-43页

作者： Huo Weiye lin Yuzhen Zhang Chi Sung Chih-jen National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics School of Energy and Power Engineering Beihang University Department of Mechanical Engineering University of Connecticut

Particle image velocimetry（PIV） is utilized to measure the non-reacting flow field in a reflow combustor with multiple and single swirlers. The velocity field, vortex structure and total vorticity levels are experimentally obtained using two different boundary conditions, representing a single confined swirler and multiple swirlers in an annular combustor. The influence of the boundary conditions on the flow field at several locations downstream of the swirlers is experimentally investigated, showing that the central vortex in the multi-swirler case is more concentrated than in the single-swirler case. The vorticity of the central vortex and average cross-sectional vorticity are relatively low at the swirler outlet in both cases. Both of these statistics gradually increase to the maximum values near 20 mm downstream of the swirler outlet, and subsequently decrease. It is also found that the central vortex in the multi-swirler case is consistently greater than the single-swirler case. These results demonstrate the critical influence of boundary conditions on flow characteristic of swirling flow, providing insight into the difference of the experiments on testbed combustor and the full-scale annular combustors.

关键词： vorticity vortex downstream consistently representing rotating utilized providing outlet averaged

Factor analysis for the statistical modeling of earthquake-induced landslides

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Frontiers of Structural and Civil Engineering 2020年第1期14卷 123-126页

作者： jeng-Wen lin Meng-Hsun HSIEH Yu-jen LI Department of Civil Engineering Feng Chia UniversityTaichung 40724China School of Management Fujian University of TechnologyFuzhou 350118China Ruentex Engineering&Construction Co. Ltd.Taipei 10492China

Earthquake-induced landslides are difficult to assess and predict owing to the inherent unpredictability of *** most existing studies,the landslide potential is statistically assessed by collecting and analyzing the data of historical landslide events and earthquake observation *** rainfall-induced landslides,earthquake-induced landslides cannot be predicted in advance using real-time monitoring systems,and the development of the models for these landslides should instead depend on early earthquake warnings and ***,in this study,factor analysis was performed and the frequency distribution method was employed to investigate the potential risk of the landslides caused by *** such as the slope gradient,lithology(geology),aspect,and elevation were selected and classified as influential factors to facilitate the construction of a landslide database for the area of study.

关键词： earthquake factor analysis slope landslides statistical modeling

Effect of transcutaneous electrical nerve stimulation through acupoints of Pucan (BL 61) and Shenmai (BL 62) on intraocular pressure in patients with glaucoma： a randomized controlled trial

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Journal of Traditional Chinese Medicine 2016年第1期36卷 51-56页

作者： Yeh Tsui-Yun lin jen-Chien Liu Chi-Feng Graduate Institute of Integration of Traditional Chinese Medicine with Western Nursing National Taipei University of Nursing and Health Sciences Taipei City Hospital Taipei 10065 China Department of Ophthalmology Taipei CityHospitaI Taipei 10065 China

OBJECTIVE： To investigate the effects of transcutaneous electrical nerve stimulation （TENS） through acupoints on the intraocular pressure （lOP） in patients with glaucoma. METHODS： A single-blinded, randomized experimental design study was conducted. Patients from the North of Taipei Ophthalmology outpatient department diagnosed with intraocular hypertension were selected and were further enrolled if they met the research subject criteria. The patients who met all criteria, and who met no exclusion criteria became the participants. Participants were randomly assigned into the treated group, wherein the TENS electrodes （Qing Ming Medical Device Co., Ltd., New Taipei City, China） were applied with direct current （DC） on the acupoints Pucan （BL 61） and Shenmai （BL 62） for 20 min. The control group received no TENS electrode treatments. Measurements of lOP were taken four times using a pneumotonometer （Clinico Co., Ltd., New Taipei City, China）, before, immediately after, 30 min after, and 60 min after TENS electrode treatments. RESULTS： Eighty-two participants completed the experiment, lOP decreased more in the group treated with DC （P 〈 0.01） than in the control *** lOPs were not affected by the age of the patients and their usage of medications. CONCLUSION： TENS of acupoints of Pucan （BL 61） and Shenmai （BL 62） could significantly reduce the lOP in patients with glaucoma.

关键词： Glaucoma Intraocular pressure Ocularhypertension Acupuncture points Transcutaneous electrical nerve stimulation Randomized con-trolled trial

Virtual Power Plants for Grid Resilience: A Concise Overview of Research and Applications

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IEEE/CAA Journal of Automatica Sinica 2024年第2期11卷 329-343页

作者： Yijing Xie Yichen Zhang Wei-jen Lee Zongli lin Yacov A.Shamash IEEE Department of Electrical Engineering University of Texas at ArlingtonArlingtonTX 76019 USA Charles L.Brown Department of Electrical and Computer Engineering University of VirginiaCharlottesvilleVA 22904 USA Department of Electrical and Computer Engineering Stony Brook UniversityStony BrookNY 11794 USA

The power grid is undergoing a transformation from synchronous generators(SGs) toward inverter-based resources(IBRs). The stochasticity, asynchronicity, and limited-inertia characteristics of IBRs bring about challenges to grid resilience. Virtual power plants(VPPs) are emerging technologies to improve the grid resilience and advance the transformation. By judiciously aggregating geographically distributed energy resources(DERs) as individual electrical entities, VPPs can provide capacity and ancillary services to grid operations and participate in electricity wholesale markets. This paper aims to provide a concise overview of the concept and development of VPPs and the latest progresses in VPP operation, with the focus on VPP scheduling and control. Based on this overview, we identify a few potential challenges in VPP operation and discuss the opportunities of integrating the multi-agent system(MAS)-based strategy into the VPP operation to enhance its scalability, performance and resilience.

关键词： Climate change renewable energy resources resilience smart grids virtual power plants(VPPs)

Abnormal liver function and central obesity associate with work-related fatigue among the Taiwan Residents workers

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World Journal of Gastroenterology 2008年第42期14卷 6541-6545页

作者： Yu-Cheng lin Jong-Dar Chen Chao-jen Chen Department of Occupational Medicine Tao- Yuan General Hospital Tao-Yuan 330 Taiwan Institute of Occupational Medicine and Industrial Hygiene College of Public Health National Taiwan University No. 17 Xu-Zhou Road Taipei 100 Taiwan China Department of Family Medicine and Center for Environmental and Occupational Medicine Shin Kong Wu Ho-Su Memorial Hospital School of Medicine Fu Jen Catholic University Taipei 111 Taiwan China Department of Family Medicine Tao-Yuan General Hospital Tao-Yuan 330 Taiwan China

AIM: To examine the associations between objective health indicators and high need for recovery (NFR) after work, one of the subjective presentations of work related-fatigue, among apparently healthy workers in modern workplaces. METHODS: From October to December, 2007, an annual health examination was performed for the workers from an electronics manufacturing factory in Taiwan. Health records of 1216 workers with a relatively homogeneous socioeconomic status were used for analysis. The health checkups included personal and NFR scale questionnaires, physical examinations, blood tests for biochemistry and hematology. The workers within the top tertile NFR score were defi ned as high-NFR workers. RESULTS: After adjusted for potential confounders, the workers with elevated alanine aminotransferase (ALT) and central obesity had a significantly higher NFR after work, with increased risks of 1.4-fold [95% confi dence interval (CI) = 1.01-2.0] and 1.8-fold (95% CI = 1.2-2.7), respectively. Shiftworkers had a 2.0-fold (95% CI = 1.5-2.6) increased risk for high-NFR. The associations between high-NFR and lipid profi les, blood sugar, hematology indexes or blood pressure were insignifi cant after controlling for ***: For apparently healthy workers, high NFR after work is not simply a subjective experience. Objective health measures, such as elevated ALT and increased waist circumference, should be carefully evaluated for the apparently healthy workers having a higher NFR after work.

关键词： Liver enzyme Need for recovery afterwork Obesity Work-related fatigue

Feeding methods, sleep arrangement, and infant sleep patterns: a Chinese population-based study

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World Journal of Pediatrics 2016年第1期12卷 66-75页

作者： Xiao-Na Huang Hui-Shan Wang jen-jen Chang lin-Hong Wang Xi-Cheng Liu Jing-Xiong Jiang lin An Department of Children Health National Center for Maternal and Children HealthChinese Center for Disease Control and PreventionBeijingChina Department of Epidemiology Saint Louis University College for Public Health and Social JusticeSt.Louis.MOUSA The National Center for Chronic and Non-communicable Disease Control and Prevention Chinese Center for Disease Control and PreventionBeijingChina Bronchoscopy Center Affi liated Children Hospital of Beijing Capital Medical UniversityBeijingChina Department of Public Health Peking University Health Science CenterBeijingChina

Background:findings from prior research into the effect of feeding methods on infant sleep are *** objectives of this study were to examine infants'sleep patterns by feeding methods and sleep arrangement from birth to eight months ***:This longitudinal cohort study enrolled 524 pregnant women at 34-41 weeks of gestation and their infants after delivery in 2006 and followed up until eight months *** study subjects were recruited from nine women and children hospitals in nine cities in China(Beijing,Chongqing,Wuhan,Changsha,Nanning,Xiamen,Xi'an,Jinan,and Hailin).Participating infants were followed up weekly during the first month and monthly from the second to the eighth month after ***-four hour sleep diaries recording infants'sleeping and feeding methods were administered based on caregiver's *** mixed growth curve models were fi tted to estimate the effects of feeding methods and sleep arrangement on infants'sleep patterns over time,controlling for maternal and paternal age,maternal and paternal education level,household income,supplementation of complementary food,and infant birth weight and ***:Exclusively formula fed infants had the greatest sleep percentage/24 h,followed by exclusively breast milk fed infants and partially breast milk fed infants(P<0.01).Night waking followed a similar ***,the differences in sleep percentage and night waking frequency between exclusively formula and exclusively breast milk fed infants weakened over time as infants *** addition,compared to infants with bed-sharing sleep arrangement,those with room sharing sleep arrangement had greater daytime and 24-hour infant sleep percentage,whereas those with sleeping alone sleep arrangement had greater nighttime sleep ***:Our data based on caregiver's selfreport suggested that partial breastfeeding and bedsharing may be associated with less sleep in *** care professio

关键词： breast feeding feeding method infant sleep sleep arrangement

The Potential Game-Changer:A Concept-to-Proof Study on D:A Heterojunction-Free Organic Photovoltaics

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Chinese Journal of Chemistry 2024年第3期42卷 252-258页

作者： Lijian Zuo Sae Byeok Jo Xueliang Shi Francis lin Alex jen State Key Laboratory of Silicon and Advanced Semiconductor Materials MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhouZhejiang310058 China Department of Materials Science and Engineering University of WashingtonSeattleWAUSA School of Chemical Engineering Sungkyunkwan University (SKKU)Suwon16419 Republic of Korea School of Chemistry and Molecular Engineering East China Normal UniversityShanghai200062 China Department of Materials Science and Engineering City University of Hong KongKowloonHong KongChina Department of Chemistry City University of Hong KongKowloonHong KongChina Hong Kong Institute for Clean Energy Hong KongChina

Since 1986,the donor-acceptor (D:A) heterojunction has been regarded a necessity for high-efficiency organic photovoltaics (OPVs),due to its unique advantage in compensating the intrinsic limitations of organic semiconductors,such as high exciton binding energy and poor ambipolar charge mobility. While this adversely causes tremendous non-radiative charge recombination and instability issues,which currently become the most critical limits for commercialization of OPVs. Here,we present a concept-to-proof study on the potential of D:A heterojunction free OPV by taking advantage of recent progress of non-fullerene acceptors. First,we demonstrate that the “free carriers” can be spontaneously generated upon illumination in an NFA,i.e.,the 6TIC-4F single layer. Second,the 6TIC-4F layer also exhibits good ambipolar charge transporting property. These exceptional characteristics distinguish it from the traditional organic semiconductors,and relieve it from the reliance of D:A heterojunction to independently work as active layer. As a result,the subsequent OPV by simply sandwiching the 6TIC-4F layer between the cathode and anode yields a considerably high power conversion efficiency ~1%. Moreover,we find the D:A heterojunction free device exhibits two order of magnitude higher electroluminescence quantum efficiency and significantly reduced VOC loss by 0.16 eV compared to those of the D:A BHJ structure,validating its promise for higher efficiency in the future. Therefore,our work demonstrates the possibility of using D:A heterojunction-free device structure for high performance,that can potentially become the next game changer of OPV.

关键词： Organic solar cells Spontaneous charge generation Ambipolar charge transport Charge recombination Perovskite-like organic semiconductor Schottky-junction structure Single component

Characterization of solid particles sampled from condensates in boiling water reactor

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Nuclear Science and Techniques 2016年第2期27卷 141-148页

作者： Yu-Hung Shih Tung-jen Wen Liang-Cheng Chen Tsuey-lin Tsai Chemistry Division Institute of Nuclear Energy Research

The growth, activation and deposition of corrosion products are the primary sources of radiation buildup on the surface of out-of-core piping in nuclear power plants. The buildup of radiation can have negative effects on the performance of the facility and cause harm to staff during maintenance outages for refueling. This paper reports on the crystalline and amorphous structures of corrosion products sampled in the boiling water reactors in nuclear power plants of Kuo-Sheng and identified using an acid dissolving technique. X-ray diffraction, scanning electron microprobe and inductively coupled plasmaatomic emission spectroscopy were used to analyze the samples. The results indicate that the quantity of amorphous iron oxide at inlet of the condensate demineralizer in Unit 2 is higher than that in Unit 1. The proportion of crystalline to amorphous corrosion products can affect the efficiency of removal. Thus, these results can be used to explain the difference in removal efficiency of condensate demineralizers in different units. Moreover, the iron oxide structures with various properties were observed in different operational periods. It is probable that the higher proportion of amorphous structures with a smaller particle size would reduce efficiency in the removal of condensate demineralization in Unit 2.

关键词：沸水反应堆电感耦合等离子体原子发射光谱法固体颗粒采样无定形结构表征凝聚腐蚀产物