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Corrosion assessment for spent nuclear fuel disposal in crystalline rock,using variant cases of hydrogeological modeling

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Nuclear Science and Techniques 2020年第12期31卷 20-31页

作者： chi-Che Hung Fraser King Yun-chen Yu chi-Jen chen Yuan-chieh Wu Wei-Ting Lin 机构不详

This paper presents a corrosion assessment of copper spent nuclear fuel disposal canisters in crystalline rock,using hydrogeological modeling.A simplified approach is considered,to avoid complex and time-consuming computer *** simplified case is presented as a base case,with changes in the hydrogeological parameters presented as variant *** results show that in Taiwan’s base case,decreasing the hydraulic conductivity of the rock or decreasing the hydraulic conductivity of dikes results in a shorter transport path for sulfide and an increase in corrosion ***,the estimated canister failure time is still over one million years in the variant cases.

关键词： Spent nuclear fuel disposal Corrosion assessment Hydrogeological modeling

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In situ tracking anisotropic photocarrier dynamics in two-dimensional ternary Ta_(2)NiSe_(5) via digital micromirror device-based pump-probe microscopy

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Photonics Research 2024年第9期12卷 1918-1926页

作者： BINGXU chen JIE QIAO FEI HAN FU FENG SHIH-chi chen Department of Mechanical and Automation Engineering The Chinese University of Hong KongHong KongChina Zhejiang Lab Research Center for Humanoid SensingHangzhou 311100China

In two-dimensional(2D)material studies,tracking the anisotropic ultrafast carrier dynamics is essential for the development of optoelectronic ***,the anisotropic optical and electronic properties are investigated via either polarization-dependent Raman spectroscopy or field-effect transistors ***,study of the anisotropic transient carrier behaviors is still challenging,due largely to the lack of picosecond-resolved acquisition or programmable scanning capabilities in the current characterization *** this work,we select Ta_(2)NiSe_(5) as a model system to investigate the ultrafast anisotropic transportation properties of photo-excited carriers and transient polarized responses via a digital micromirror device(DMD)-based pumpprobe microscope,where the probe beam scans along the armchair and zigzag directions of a crystal structure via binary holography to obtain distinct carrier diffusion coefficients,*** results reveal the nonlinear diffusion behaviors of Ta_(2)NiSe_(5) in tens of picoseconds,which are attributed to the interplay between excited electrons and *** trend of the measured local polarization-dependent transient reflectivity is consistent with the polarized Raman spectra *** results show that the DMD-based pump-probe microscope is an effective and versatile tool to study the optoelectronic properties of 2D materials.

关键词： anisotropic mirror transient

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Beehive: low-cost content subscription service using cloudlets

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Science china(Information Sciences) 2013年第7期56卷 194-209页

作者： XING YuanJian YANG Zhi chen chi DAI YaFei Department of Computer Science Peking University

In recent years, Content Subscription Service (CSS) is showing a notable success in helping users fetch unpopular data in P2P networks. It works by maintaining a storage pool to pull the subscribed file and then redistribute them to the requestor. However, existing commercial CSS incurs huge bandwidth/equipment cost due to introducing a third-party cloud storage. We present Beehive, a low-cost yet efficient CSS, which leverages the idle node bandwidth/storage (i.e., cloudlets) in the original P2P system to form an inherent cloudlet storage. Since P2P nodes are geographically distributed, highly dynamic and heterogeneous, Beehive adopts three key techniques to achieve high performance. First, by applying random linear network coding, multiple seeders can upload the same file simultaneously without complicated wide-area coordination. Second, a model is developed to set the coding parameters so that the cloudlet storage achieves guaranteed performance in file availability and data distribution efficiency. Finally, by performing task outsourcing, overloaded seeders quickly offload their tasks to idle peers, which effectively balances the load and utilizes the system resources. We implement Beehive with 29,000 lines of C++ codes and deploy it in a real P2P file-sharing system. Results show that Beehive improves the success ratio of pulling peer-side files from 38.7% (traditional online download) to 84.3% (users offline waiting for less than three days), and provides users with over 200 kB/s download speed.

关键词： content subscription service peer-to-peer low-cost cloudlet-based storage

Prevention of hepatitis B reactivation in patients requiring chemotherapy and immunosuppressive therapy

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World Journal of Clinical Cases 2021年第21期9卷 5769-5781页

作者： chih-An Shih Wen-chi chen Division of Gastroenterology and Hepatology Department of Internal MedicineKaohsiung Veterans General HospitalKaohsiung 813Taiwan Division of Gastroenterology and Hepatology Department of Internal MedicineAntai Medical Care CorporationAntai Tian-Sheng Memorial HospitalPingtung County 928Taiwan Department of Nursing Meiho UniversityPingtung County 928Taiwan Faculty of Medicine School of MedicineNational Yang Ming Chiao Tung UniversityTaipei 112Taiwan Institute of Biomedical Sciences College of ScienceNational Sun Yat-sen UniversityKaohsiung 8424Taiwan

Hepatitis B virus(HBV)reactivation can lead to severe acute hepatic failure and death in patients with HBV *** reactivation(HBVr)most commonly develops in patients undergoing cancer chemotherapy,especially B cell-depleting agent therapy such as rituximab and ofatumumab for hematological or solid organ malignancies and that receiving hematopoietic stem cell transplantation without antiviral *** addition,the potential consequences of HBVr is particularly a concern when patients are exposed to either immunosuppressive or biologic therapies for the management of rheumatologic diseases,inammatory bowel disease and dermatologic ***,screening with HBV serological markers and prophylactic or pre-emptive antiviral treatment with nucleos(t)ide analogues should be considered in these patients to diminish the risk of *** review discusses the clinical manifestation,prognosis and management of HBVr,risk stratifications of cancer chemotherapy and immunosuppressive therapy and international guideline recommendations for the prevention of HBVr in patients with HBV infection and resolved hepatitis B.

关键词： Hepatitis B virus Reactivation Chemotherapy Immunosuppression Prevention

Arbitrary amplitude femtosecond pulse shaping via a digital micromirror device

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Journal of Innovative Optical Health Sciences 2019年第1期12卷 14-21页

作者： chenglin Gu Dapeng Zhang Yina Chang Shih-chi chen State Key Laboratory of Precision Spectroscopy East china Normal University Shanghai 200062 P.R.China Department of Mechanical and Automation Engineering The chinese University of Hong Kong ShatinN.T.Hong Kong SARP.R.China

An ultrafast spectrum programmable femtosecond laser may enhance the performance of a wide variety of scientific applications,e.g.,multi-photon *** this paper,we report a digital micromirror device(DMD)-based ultrafast pulse shaper,i.e.,DUPS,for femtosecond laser arbitrary amplitude shaping-the first time a programmable binary device reported to shape the amplitudes of ultrafast pulses spectrum at up to 32 kHz rate over a broad wavelength *** DUPS is highly effcient,compact,and low cost based on the use of a DMD in combination with a transmission *** and temporal dispersion introduced by the DUPS is compensated by a quasi-4-f setup and a grating pair,*** pulses with arbitrary spectrum shapes,including rectangular,sawtooth,triangular,double-pulse,and exponential profile,have been demonstrated in our experiments.A feedback operation process is implemented in the DUPS to ensure a robust and repeatable shaping *** total effciency of the DUPS for amplitude shaping is measured to be 27%.

关键词： Spectrum shaping ultrafast laser digital micromirror device

A STUDY ON FACTORS FOR RETAILERS IMPLEMENTING CPFR-A FUZZY AHP ANALYSIS

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Journal of Systems Science and Systems Engineering 2010年第2期19卷 192-209页

作者： Hsin-Pin FU Kuo-Kuang CHU Sheng-Wei LIN chi-Ren chen Department of Marketing and Distribution Management National Kaohsiung First University of Science and Technology Kaohsiung (811) Taiwan China Department of Tourism management Shih Chien University Kaohsiung campus (845) Taiwan China Department of Marketing and Logistics Management Far East University Tainan County (744) Taiwan China

Since collaborative, planning, forecasting, and replenishment （CPFR） was first proposed in 1998, numerous studies have focused on exploring its implementation in retailing contexts. While a considerable body of research has emphasized reduced costs, increased sales and improved forecasting ability, there has been a lack of research on the importance of each of the various factors which affect such implementations. In order to find out the critical success factors affecting CPFR implementation, this paper first collected related influence factors regarding adopting CPFR or business to business （B2B） information systems, and further constructed a factor table with a three-layer hierarchical structure. A pair wise analytic hierarchy process （AHP） questionnaire was designed and distributed to experts who were familiar with implementing CPFR in the retailing industry. After questionnaires were returned, we found out the weights of each impact factor by using a fuzzy analytic hierarchy process （fuzzy AHP） approach. The importance of each critical impact factor was investigated, and the paths of the critical success factors were also analyzed. The results of this study can provide more precise information with regard to allocating optimal resources for retailers implementing CPFR.

关键词： Collaborative planning forecasting and replenishment (CPFR) critical influence factors fuzzy analytic hierarchy process (fuzzy AHP)

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An electrostatic spectral neighbor analysis potential for lithium nitride

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npj Computational Materials 2019年第1期5卷 508-515页

作者： Zhi Deng chi chen Xiang-Guo Li Shyue Ping Ong Department of NanoEngineering University of California San Diego9500 Gilman DrMail Code 0448La JollaCA 92093-0448USA

Machine-learned interatomic potentials based on local environment descriptors represent a transformative leap over traditional potentials based on rigid functional forms in terms of prediction ***,a challenge in their application to ionic systems is the treatment of long-ranged ***,we present a highly accurate electrostatic Spectral Neighbor Analysis Potential(eSNAP)for ionicα-Li3N,a prototypical lithium superionic conductor of interest as a solid electrolyte or coating for rechargeable lithium-ion *** show that the optimized eSNAP model substantially outperforms traditional Coulomb–Buckingham potential in the prediction of energies and forces,as well as various properties,such as lattice constants,elastic constants,and phonon dispersion *** also demonstrate the application of eSNAP in long-time,large-scale Li diffusion studies in Li3N,providing atomistic insights into measures of concerted ionic motion(e.g.,the Haven ratio)and grain boundary *** work aims at providing an approach to developing quantum-accurate force fields for multi-component ionic systems under the SNAP formalism,enabling large-scale atomistic simulations for such systems.

关键词： electrostatic lithium ionic

Species diversity,taxonomy and multi-gene phylogeny of phlebioid clade(Phanerochaetaceae,Irpicaceae,Meruliaceae)of Polyporales

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Fungal Diversity 2021年第6期111卷 337-442页

作者： Che-chih chen chi-Yu chen Sheng-Hua Wu Department of Plant Pathology National Chung Hsing UniversityTaichung 402202Taiwan Department of Biology National Museum of Natural ScienceTaichung 404605Taiwan Biodiversity Research Center Academia SinicaTaipei 115201Taiwan

The phlebioid clade(Polyporales,Basidiomycota)accommodates numerous species of corticioid and polyporoid fungi of the Phanerochaetaceae,Irpicaceae,and *** present study used morphological and phylogenetic approaches to revise the generic classification of the phlebioid clade and survey species *** phylogenetic analyses were performed using sequences of multiple genes,including the nuc rDNA ITS1-5.8S-ITS2(ITS),the D1-D2 domains of 28S rDNA(28S),the RNA polymerase II largest subunit(rpb1),the RNA polymerase II second largest subunit(rpb2),and the translation elongation factor 1-α(tef1).We overall recognize 57 genera including six new ones(Alboefibula,Cremeoderma,Gelatinofungus,Luteochaete,Phanerochaetella and Quasiphlebia).We describe 26 new species belonging to 15 genera(Alboefibula bambusicola,***,Crustodontia taiwanensis,Cytidiella albomarginata,Efibula matsuensis,***-gida,***,Gelatinofungus brunneus,Hydnophlebia aurantia,***,Irpex lenis,Mycoaciella efibulata,Phanerochaete alpina,***,***,***,***,***,Phanerochaetella formosana,Phlebiopsis odontoidea,***,Quasiphlebia densa,Rhizochaete chinensis,Roseograndinia jilinensis,***,and Scopuloides allantoidea),and present 18 new combinations belonging to 12 genera(Cremeoderma unicum,Crustodontia nigrodontea,***,Cytidiella albida,Efibula intertexta,Hydnophlebia alachuana,Irpex laceratus,***,***,Luteochaete subglobosa,Luteoporia lutea,Phanerochaetella angustocystidiata,***,***,***,Phlebiopsis alba,Rhizochaete lutea,Scopuloides dimorpha).Descriptions,illustrations and notes of new species and some new records are provided,as well as identification keys to genera of each family.

关键词： Basidiomycota Classification Systematics Wood-decay fungi 50 new taxa

Analysis of longitude profiled rolling process of Cu/Al cladded sheet and evaluation of outlet warpage

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Journal of Iron and Steel Research International 2022年第6期29卷 973-982页

作者： Jing-na Sun chi chen Shuo Wang Guan-nan Liu Hua-gui Huang National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan UniversityQinhuangdao 066004HebeiChina Xinxiang Aviation Industry(Group)Co. Ltd.Xinxiang 453000HenanChina Harbin Dongan Engine Co. Ltd.Harbin 150060HeilongjiangChina

Longitude profiled cladded sheet is obtained by rolling bimetal cladded sheet with variable gauge rolling *** longitude profiled rolling process of Cu/Al cladded sheets was studied by finite element method and *** rolling force rises with the increase in reduction,and a sudden change appears at the end of the thickness variation *** thickness ratio of copper layer is enlarged after rolling owing to its relatively large deformation resistance and continues to rise with the increase in reduction *** elongation of copper side leads to the warpage of exit metal to copper side,which further hinders the deformation of *** influence of asymmetric rolling parameters indicates that increasing the work roll diameter ratio,speed radio,and friction coefficient on Al side can reduce the warpage when the reduction rate is below a certain value depending on the thickness ratio and other rolling *** of experiments and simulation results showed good agreement and verified the finite element model.

关键词： Longitude profiled rolling Cladded sheet Rolling force Layer thickness ratio Outlet warpage Asymmetric rolling