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Locally repairable codes from combinatorial designs

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Science China(Information Sciences) 2020年第2期63卷 174-188页

作者： Yu ZHAnG Haibin kan Shanghai Key Laboratory of Intelligent Information Processing School of Computer ScienceFudan University Fudan-Zhongan Joint Laboratory of Blockchain and Information Security Shanghai Engineering Research Center of Blockchain Shanghai Institute for Advanced Communication and Data Science

Locally repairable codes（LRCs） were proposed to reduce the repair degree in distributed storage systems. In particular, LRCs with availability are highly desirable for distributed storage systems, since this kind of codes provide the mechanism of local repair for code symbols and parallel reading of hot *** this paper, we propose four types of（n, k, r, t）;LRCs from combinatorial designs. We introduce several constructions of LRCs with strict availability and some constructions of distance-optimal LRCs with information-symbol locality. Most of our constructions in this paper are over F;, i.e., they are suitable for implementation.

关键词： locally repairable codes erasure codes combinatorial designs distributed storage systems codes with availability

Mortality of therapeutic fish Garra rufa caused by Aeromonas sobria

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Asian Pacific Journal of Tropical Biomedicine 2012年第2期2卷 85-87页

作者： Juraj Majtán Jaroslav erny Alena Ofúkaná Peter Taká Milan Kozánek Institute of Zoology Slovak Academy of SciencesDubravska cesta 984 506 Bratislava Department of Microbiology Faculty of MedicineSlovak Medical UniversityLimbova 1 283 303Bratislava

Objective:To investigate a case of mass mortality of Garra rufa(***)from a fish hatchery farm in ***:Causative bacterial agent was swabbing out of affected fish skin area and subsequently identified using commercial test *** susceptibility was determined by the disk diffusion ***:Infected *** was characterized by abnormal swimming behaviour,bleeding of skin lesions and local *** of using recommended aquatic antibiotic treatment no improvement was achieved and Aeromonas sobria{***)was identified as a causative agent of fish *** to massive fish mortality,antibiotic susceptibility of pure isolated culture of *** was evaluated employing eight antibiotics against human *** was resistant only against one antibiotic,namely ***:These results indicate that *** can act as a primary pathogen of *** and may be a potential risk factor for immunodeficient or immunoincompetent patients during the ichthyotherapy.

关键词： Garra rufa lehthyotherapy Aeromonas sobria Antibiotic treatment Antibiotic susceptibility

Variability of platelet aggregation in patients with clopidogrel treatment and hip fracture: A retrospective case-control study on 112 patients

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World Journal of Orthopedics 2015年第5期6卷 439-445页

作者： Anna Clareus Inga Fredriksson Hkan Wallén Max Gordon André Stark Olof Skldenberg Division of Orthopaedics Department of Clinical Sciences at Danderyd Hospital Karolinska Institutet Division of Anesthesiology Department of Clinical Sciences at Danderyd Hospital Karolinska Institutet Division of Cardiology Department of Clinical Sciences at Danderyd Hospital Karolinska Institute

AIM: To identify the rate of non-responders to clopidogrel treatment in hip fracture patients and study how non-responders differ from ***: In a retrospective case-control study we included 28 cases of acute proximal femoral fracture with clopidogrel treatment 2011 to 2013. Eighty-four controls from the same time period were included. Data collected included response to clopidogrel measured with multiple electrode aggregometry(MEA), intraoperative bleeding, erythrocyte transfusion, time to surgery and the incidence of adverse events up to 3 mo after surgery. reSULTS: Eight(29%) of the 28 cases were nonresponders. The median intraoperative bleeding was 300 mL(range, 0-1500), and was lower for non-responders(50 m L) but did not reach statistical significance. Erythrocyte transfusions did not differ between responders, non-responders and controls. Forty-five(40%) of 112 patients had adverse events postoperatively but the rate did not differ between patients with and without clopidogrel ***: Almost one-third of patients withclopidogrel treatment and an acute proximal femoral fracture are non-responders to antiplatelet therapy and can be operated without delay.

关键词： Proximal femoral fracture Clopidogrel Variability Bleeding Adverse events

Electromechanically reconfigurable plasmonic photodetector with a distinct shift in resonant wavelength

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Microsystems & nanoengineering 2023年第2期9卷 219-226页

作者： Masaaki Oshita Shiro Saito Tetsuo kan Graduate School of Informatics and Engineering The University of Electro-Communications1-5-1ChofugaokaChofu-cityTokyo 182-8585Japan IMRA JAPAn CO. LTD2-36Hachiken-choKariyaAichi 448-8650Japan

Plasmonic photodetectors have received increasing attention because their detection properties can be designed by tailoring their metal structures on surfaces without using any additional *** of the plasmonic resonant state in a photodetector is relevant for various applications,including investigating in situ adaptive detection property changes,depending on the situation,and performing single-pixel spectroscopy in geometrically limited ***,the spectral responsivity change with conventional reconfiguration methods is relatively ***,we propose a plasmonic photodetector that reconfigures its spectral responsivity with electromechanical deformation instead of bias *** photodetector consists of a gold plasmonic grating formed on an n-type silicon cantilever,and the spectral responsivity is reconfigured by electromechanically scanning at an incident angle to the grating on the *** photodetector exhibits peak shifts in spectral responsivity in a wavelength range from 1250 to 1310 nm after electromechanical ***,for potential future applications,we demonstrate near-infrared spectroscopy using the *** photodetector has the potential to be adopted as a near-infrared spectrometer in industrial silicon imaging systems because its structure enables subbandgap photodetection on silicon by a Schottky junction.

关键词： tuning reconfigurable resonant

Construction of one special minimum storage regenerating code when α=2

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Science China(Information Sciences) 2015年第6期58卷 116-125页

作者： LIAnG SongTao LIAnG WenJuan kan HaiBin Shanghai Key Laboratory of Intelligent Information Processing School of Computer ScienceFudan University College of Computer and Information Engineering Henan University

regenerating codes is one class of erasure codes for distributed storage. A [n, k, d, α, β] regenerating code can recover the original message from any k out of n distributed storage nodes and repair any failed node from other arbitrary d nodes. α is the number of symbols stored in one node and β is the number of symbols downloaded by a newcomer node. Minimum storage regenerating(MSR) code is a regenerating code attaining the minimal storage requirement. In this paper, we address the design of a special MSR code where α = 2 and the first fragment of a node stores original symbol(we call it hybrid systematic MSR code or HS-MSR code). We point out that there exists no exact-repair construction when k 5. A simple exact linear construction is given when k = 2. Furthermore, by relaxing the condition of connecting any d nodes, we investigate the properties of quasi-cyclic regenerating code and propose a unified construction such that when k 3, repairing process can be achieved with less repair bandwidth by repair-by-transfer form.

关键词： array codes distributed storage network coding maximum-distance-separable(MDS) codes min-imum storage regenerating(MSR) codes

recent progress on all-small molecule organic solar cells using small-molecule nonfullerene acceptors

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InfoMat 2021年第2期3卷 175-200页

作者： Bin kan Yuanyuan kan Lijian Zuo Xueliang Shi Ke Gao Department of Materials Science and Engineering University of WashingtonSeattleWashington

recently,solution-processed organic solar cells combining small-molecule donor and nonfullerene acceptor have achieved breakthrough results with the certified efficiency over 15%.These impressive progresses are driven by the concerted efforts of modifying the donor and acceptor materials and optimizing the *** the defined chemical structures and easily tuned properties of small-molecule materials,it is of great necessity and importance to pay more attentions on the topic of all-small molecule organic solar ***,we summarize the recent progress of all-small molecule organic solar cells from the prospect of materials'evolutions and expect to provide some hints for its future *** involved small-molecule donors including oligothiophene-,benzodithiophene-,naphthodithiophene-,and porphyrin-based materials are discussed to illustrate the relationship of chemical structures,properties,and device ***,the small-molecule nonfullerene acceptors in all-small molecules organic solar cells are discussed to highlight their vital ***,we will present the challenges and future of this research area.

关键词： all-small molecule organic solar cells high-performance nonfullerene acceptors small-molecule donors

Flexible organic solar cells for biomedical devices

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nano research 2021年第9期14卷 2891-2903页

作者： Bin kan Faheem Ershad Zhoulyu Rao Cunjiang Yu Department of Mechanical Engineering University of HoustonHoustonTX 77204USA Department of Biomedical Engineering University of HoustonHoustonTX 77204USA Materials Science and Engineering Program University of HoustonHoustonTX 77204USA Department of Electrical and Computer Engineering University of HoustonHoustonTX 77204USA Texas Center for Superconductivity University of HoustonHoustonTX 77204USA

Organic solar cells(OSCs),particularly made based on solution processing methods,have made significant progress over the past decades through the concurrent evolution of organic photovoltaic materials and device ***,high power conversion efficiencies around 18%and over 16%have been demonstrated in both rigid and flexible OSCs,*** most of the OSC research has centered on efficiency and cost,their emerging and potential usages in many critical applications,particularly in biomedical fields have been *** this mini-review,we will briefly discuss the high-performance organic photovoltaic materials and the representative flexible OSCs to give a scope on the recent rapid development of ***,we will review some progress on the applications of OSCs in biomedical devices and integrated *** potential challenges associated with integrating OSCs for biomedical devices will be put forward.

关键词： organic solar cells photovoltaic flexible biomedical bioelectronics

The recombinant expression systems for structure determination of eukaryotic membrane proteins

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Protein & Cell 2014年第9期5卷 658-672页

作者： Yuan He kan Wang nieng Yan State Key Laboratory of Bio-membrane and Membrane Biotechnology Tsinghua university Beijing 100084 China Center for Structural Biology School of Medicine Tsinghua university Beijing 100084 China China-Japan Friendship Hospital Beijing 100029 China

Eukaryotic membrane proteins, many of which are key players in various biological processes, constitute more than half of the drug targets and represent important candidates for structural studies. In contrast to their physiological significance, only very limited number of eukaryoUc membrane protein structures have been obtained due to the technical challenges in the genera- tion of recombinant proteins. In this review, we examine the major recombinant expression systems for eukaryotic membrane proteins and compare their relative advantages and disadvantages. We also attempted to summarize the recent technical strategies in the advancement of eukaryotic membrane protein purification and crystallization.

关键词： eukaryotic membrane proteins,recombinant expression structural biology integralmembrane proteins (IMPs) fluorescence detected sizeexclusion chromatography (FSEC) protein purification and crystallization

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Explicit-form complex orthogonal design for space-time block codes

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Science China(Information Sciences) 2013年第6期56卷 15-24页

作者： LI Yuan YUAn Chen kan HaiBin School of Computer Science Fudan University

In this paper,we present a construction of complex orthogonal design for space-time block codes in any number of *** construction achieves both the maximal rate and minimal *** far as we know,our construction is the first explicit-form construction,which has asymptotically optimal time complexity and space *** new representation of complex orthogonal design might bring advantages in analyzing some *** addition,when the number of antennas n ≡ 1,2,3(mod 4),our construction satisfies transceiver signal linearization property,which allows for design of low complexity channel equalizers and interference suppressing filters.

关键词： space-time block codes complex orthogonal design explicit-form construction maximal rate minimal delay