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Science China Chemistry 2023年第3期66卷 615-619页

作者： Qunping Fan francis RLin Wei ma Alex K.-Y.Jen State Key Laboratory for mechanical Behavior of materials Xi’an Jiaotong UniversityXi’an 710049China Department of Chemistry City University of Hong KongKowloon 999077Hong KongChina Department of materials Science and Engineering City University of Hong KongKowloon 999077Hong KongChina Hong Kong Institute for Clean Energy City University of Hong KongKowloon 999077Hong KongChina Department of materials Science and Engineering University of WashingtonSeattleWashington 98195-2120USA

Before 2015,only few organic solar cells(OSCs)obtained power conversion efficiencies(PCEs)over 10%because the commonly used fullerene derivatives as acceptors have narrow absorption,low extinction coefficient,and are difficult to adjust energy *** overcome these shortcomings,in 2015,Zhan et al.[1]developed acceptor(A)-donor(D)-A-type fused-ring small-molecule acceptors(SmAs)with good planarity and strong intramolecular charge transfer(ICT)effect to fulfill both broad absorption and high extinction coefficient,offering the revolutionary PCEs of 13%–15%.In 2019,another milestone SmA(Y6)with A-DA′D-A structure was developed by Zou et al.

关键词： fused extinction absorption

Disinfection byproduct regulatory compliance surrogates and bromide-associated risk

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Journal of Environmental Sciences 2017年第8期29卷 191-207页

作者： Chelsea Kolb Royce A.francis Jeanne m.VanBriesen Department of Ciuil and Environmental Engineering Carnegie Mellon Uniuersity Pittsburgh PA 15213 USA Department of Engineering management and Systems Engineering The George Washington University Washington DC 20052 USA Department of Engineering and Public Policy Carnegie Mellon University Pittsburgh PA 15213 USA

Natural and anthropogenic factors can alter bromide concentrations in drinking water sources. Increasing source water bromide concentrations increases the formation and alters the speciation of disinfection byproducts（DBPs） formed during drinking water *** DBPs are more toxic than their chlorinated analogs, and thus have a greater impact on human health. However, DBPs are regulated based on the mass sum of DBPs within a given class（e.g., trihalomethanes and haloacetic acids）, not based on species-specific risk or extent of bromine incorporation. The regulated surrogate measures are intended to protect against not only the species they directly represent, but also against unregulated DBPs that are not routinely measured. Surrogates that do not incorporate effects of increasing bromide may not adequately capture human health risk associated with drinking water when source water bromide is elevated. The present study analyzes trihalomethanes（THms）, measured as TTHm,with varying source water bromide concentrations, and assesses its correlation with brominated THm, TTHm risk and species-specific THm concentrations and associated *** potential surrogates are evaluated to assess their ability to capture THm risk under different source water bromide concentration conditions. The results of the present study indicate that TTHm does not adequately capture risk of the regulated species when source water bromide concentrations are elevated, and thus would also likely be an inadequate surrogate for many unregulated brominated species. Alternative surrogate measures,including THm3 and the bromodichloromethane concentration, are more robust surrogates for species-specific THm risk at varying source water bromide concentrations.

关键词： Disinfection byproducts Bromide Disinfection byproduct regulation Trihalomethanes Disinfection byproduct risk

Deterministic approaches for noncoherent communicationswith chaotic carriers

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Journal of Systems Engineering and Electronics 2005年第2期16卷 253-257页

作者： LiuXiongying QiuShuisheng francis.C.m.Lau CollegeofElectronicandInformationEngineering SouthChinaUniversityofTechnologyGuangzhou510640P.R.China DepartmentofElectronicandInformationEngineering HongkongPolytechnicUniversityHongkongP.R.China

Two problems are proposed. The first one is the noise decontamination of chaotic carriers using a deterministic approach to reconstruct pseudo trajectories, the second is the design of communications schemes with chaotic carriers. After presenting our deterministic noise decontamination algorithm, conventional chaos shift keying (CSK) communication system is applied. The difference of Euclidean distance between noisy trajectory and decontaminated trajectory in phase space could be utilized to non-coherently detect the sent symbol simply and effectively. It is shown that this detection method can achieve the bit error rate performance comparable to other non-coherent systems.

关键词： gradient descent reconstruction chaotic communications noncoherent detection.

The impact of simulated gastrointestinal digestion on the bioaccessibility and antioxidant activity of purple rice phenolic compounds

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Food Bioscience 2022年第3期47卷 881-888页

作者： Borkwei Ed Nignpense Sajid Latif Nidhish francis Christopher Blanchard Abishek Bommannan Santhakumar School of Dentistry and medical Sciences Charles Sturt UniversityLocked Bag 588Wagga WaggaNSW 2678Australia National Life Sciences Research Hub Charles Sturt UniversityWagga WaggaNSW 2795Australia School of Agricultural Environment and Veterinary SciencesCharles Sturt UniversityWagga WaggaNSW 2650Australia Gulbali Institute Charles Sturt UniversityWagga WaggaNSW 2650Australia Australian Research Council (ARC) Industrial Transformation Training Centre (ITTC) for Functional GrainsGraham Centre for Agricultural InnovationCharles Sturt UniversityWagga WaggaNSW 2650Australia

Polyphenol-rich purple rice has been shown to exhibit a wide range of health properties including antioxidant *** study aimed to determine the impact that gastrointestinal digestion of purple rice had on its phenolic bioaccessibility and antioxidant *** results demonstrated a significant difference(pmulated gastric and intestinal ***,mass spectrometry and ultra-high-performance liquid chromatography(UHPLC)coupled with online ABTS•+scavenging activity demonstrated a significant loss in the number of polyphenols that were bioaccessible after ***,substantial free radical scavenging activity was retained after digestion due to the bioaccessibility of bioactive compounds such as tryptophan and protocatechuic ***,purple rice may be considered as a source of bioaccessible phenolic and antioxidant compounds.

关键词： Antioxidant Bioaccessibility Gastrointestinal digestion Polyphenols Purple rice

Trust,politics and post-IPO performance:SOEs *** private sector

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Economic and Political Studies 2022年第3期10卷 290-313页

作者： Bill francis Iftekhar Hasan Xian Sun mingming Zhou Lally School of management Rensselaer Polytechnic InstituteTroyNYUSA Gabelli School of Business Fordham UniversityNew YorkNYUSA Bank of Finland HelsinkiFinland Business School University of SydneySydneyAustralia Carey Business School Johns Hopkins UniversityBaltimoreMDUSA Lubin School of Business Pace UniversityNew YorkNYUSA

This paper empirically investigates the role of social trust in the long-term performance of the initial public offerings(IPOs)in China,controlling for the formal institutional *** find that privately owned or smaller IPO firms experience signifi-cantly better post-IPO performance when they are incorporated in regions with more social *** state-owned and bigger IPO firms,on the other hand,experience better long-term post-IPO performance when they are incorporated in regions with stronger formal institutions(*** enforcement and contract holding).Political pluralism turns out to benefit all IPOs in the long *** addition,our evidence shows that stronger social trust substitutes for the quality of court enforcement but complements the role of contract *** results are robust after controlling for alternative definitions of ownership,outliers,non-linear effects of institutions,and the potential endogeneity of institutions in the model.

关键词： Institution social trust political pluralism IPO China

A review of the current evidence for the role of minimally invasive pancreatic surgery following neo-adjuvant chemotherapy

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Laparoscopic, Endoscopic and Robotic Surgery 2022年第2期5卷 47-51页

作者： francis P.Robertson Rowan W.Parks Department of Hepatobiliary and Transplant Surgery Freeman HospitalNewcastleUnited Kingdom Department of Clinical Surgery Royal Infirmary of EdinburghEdinburghUnited Kingdom Division of Surgical and Interventional Science Royal Free CampusUniversity College LondonLondonUnited Kingdom

Objective:Surgical resection of pancreatic cancer remains the only potentially curative treatment for pancreatic ductal *** robotic platform has been introduced to surgical practice and recent large studies from national registries have demonstrated similar or improved peri-operative outcomes compared to the standard open ***-adjuvant chemotherapy is increasingly being offered to patients with borderline resectable/locally advanced disease but this has led to more challenging *** of patients undergoing minimally invasive resection following neo-adjuvant chemotherapy remain *** aim of this review is to assess the current evidence for the peri-operative safety and long-term oncological outcomes associated with minimally invasive pancreatic resection following neo-adjuvant ***:medline,Embase and Cochrane Central Register for Clinical Trials were searched up until 31st October *** search terms include“minimally invasive”,“robotic”,“laparoscopic”,“pancreatectomy”,“pancreatic resection”,“whipple's pancreaticoduodenectomy”,“distal pancreatectomy”,“chemotherapy”,“neo-adjuvant chemotherapy”,“radiotherapy”,“neo-adjuvant chemoradiotherapy”,“induction therapy”,and“conversion surgery”.All studies including patients undergoing pancreatic resections were *** which did not clearly state the approach to resection(minimally invasive or open)were ***:Seventy-eight studies were identified of which 8 compared open and minimally invasive resection following neo-adjuvant *** was insufficient data to perform a *** surgery was associated with lower blood loss and shorter length of hospital ***-year overall survival rates were similar between patients who underwent robotic or open resection however the robotic approach was associated with higher lymph node yield and a lower R1 resection ***:Currently the evidence for minimally invasive surgery foll

关键词： Pancreatic resection minimally invasive Robotic Neo-adjuvant chemotherapy

低负载锆基mOF增强聚双环戊二烯纳米复合材料

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高分子材料科学与工程 2022年第4期38卷 50-57,65页

作者：吴飞扬陈琦陈宬 francis Verpoort 武汉理工大学材料科学与工程学院武汉理工大学材料复合新技术国家重点实验室湖北武汉430070

文中以纳米多孔锆基mOFs(Zr-mOFs)材料(UIO-66和UIO-66-NH2)为填料用于增强聚双环戊二烯的力学性能,采用原位聚合法制备了Zr-mOFs/PDCPD纳米复合材料。通过红外分析和场发射扫描电镜表征了Zr-mOFs颗粒对Zr-mOFs/PDCPD复合材料的界面和... 详细信息

文中以纳米多孔锆基mOFs(Zr-mOFs)材料(UIO-66和UIO-66-NH2)为填料用于增强聚双环戊二烯的力学性能,采用原位聚合法制备了Zr-mOFs/PDCPD纳米复合材料。通过红外分析和场发射扫描电镜表征了Zr-mOFs颗粒对Zr-mOFs/PDCPD复合材料的界面和其在聚双环戊二烯中分散的影响。通过拉伸实验、无缺口冲击试验、弯曲实验等方法研究了Zr-mOFs/PDCPD复合材料的力学性能,确定了最佳的Zr-mOFs负载量。结果表明,当UIO-66-NH2质量分数为0.6%时,复合材料的拉伸强度、弯曲强度、冲击强度相比于纯的PDCPD分别提升了29%,30.8%,25.1%,改性后的复合材料热变形温度提升了31.3%。

关键词：聚双环戊二烯纳米多孔锆基UIO-66-NH2 复合材料力学性能热变形温度

Constructing a stable cobalt-nitrogen-carbon air cathode from coordinatively unsaturated zeolitic-imidazole frameworks for rechargeable zinc-air batteries

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Nano Research 2022年第7期15卷 5895-5901页

作者： Tingting Wang meng Liu Somboon Chaemchuen Jichao Wang Ye Yuan Cheng Chen Ang Qiao francis Verpoort Zongkui Kou State Key Laboratory of Advanced Technology for materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Zeolitic-imidazole frameworks(ZIFs)derivations have widely emerged as an efficient air cathode of zinc-air batteries(ZABs)due to excellent bifunctional oxygen electrocatalysis ***,they are not stable enough for long-term operation of rechargeable ZABs because of weak association with current collector,especially under bending conditions for flexible ZAB ***,we show that by purposely designing coordinatively unsaturated ZIFs via a facile morphology regulation,which can be chemically linked on acid-treated carbon cloth,a stable Co-N-C air cathode is therefore derived where Co nanoparticles(NPs)are uniformly confined within the Co-N-C matrix on carbon cloth(Co/Co-N-C/CC).Specifically,when without being stabilized from carbon cloth,the pyrolysis of ZIFs with different unsaturated coordination levels has a negligible impact on the bifunctional oxygen-catalyzed *** optimal Co/Co-N-C/CC catalyst assembled ZAB possesses a large open circuit voltage of 1.415 V and a high peak power density of 163 mW·cm^(−2) as well as excellent cycling durability upon 630 discharge–charge cycles with 61%voltage efficiency remained,largely exceeding those of a benchmark Pt/C-IrO_(2) catalyst assembled *** synergy between Co NPs and active Co-N-C sites via electronic interaction induces the outstanding bifunctional oxygen-catalyzed activity and cathode *** present work highlights the importance of unsaturated coordination structures in ZIFs precursors for the performance of derived nanostructures in integrated electrodes.

关键词： coordinatively unsaturated zeolitic-imidazole frameworks(ZIFs) cobalt-nitrogen-carbon bifunctional air electrodes zincair battery flexible electrode

Patient care during interfacility transport:a narrative review of managing diverse disease states

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世界急诊医学杂志(英文) 2023年第1期14卷 3-9页

作者： Quincy K.Tran francis O’Connell Andrew Hakopian marwa SH Abrahim Kamilla Beisenova Ali Pourmand Department of Emergency medicine University of Maryland School of MedicineBaltimore 21201USA Program in Trauma the R Adams Cowley Shock Trauma CenterUniversity of Maryland School of MedicineBaltimore 21201USA Department of Emergency medicine George Washington University School of Medicine and Health SciencesWashington DC 20037USA

BACKGROUND:When critically ill patients require specialized treatment that exceeds the capability of the index hospitals,patients are frequently transferred to a tertiary or quaternary hospital for a higher level of ***,appropriate and efficient care for patients during the process of transport between two hospitals(interfacility transfer)is an essential part of patient *** medical adverse events may occur during the interfacility transfer process,there have not been evidence-based guidelines regarding the equipment or the practice for patient care during ***:We conducted searches from the Pubmed,Cumulative Index of Nursing and Allied Health(CINAHL),and Scopus databases up to June *** reviewers independently screened the titles and abstracts for *** that were not in the English language and did not involve critically ill patients were ***:The search identified 75 articles,and we included 48 studies for our narrative *** studies were observational ***:The review provided the current evidence-based management of diverse disease states during the interfacility transfer process,such as proning positioning for respiratory failure,extracorporeal membrane oxygenation(ECmO),obstetric emergencies,and hypertensive emergencies(aortic dissection and spontaneous intracranial hemorrhage).

关键词： Critically ill patients Interfacility transfer Interhospital transfer Extracorporeal membrane oxygenation Obstetric emergencies Hypertensive emergencies

Determination of contact parameters for discrete element method simulations of granular systems

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Particuology 2008年第6期6卷 521-528页

作者： Kevin francis malone Institute of Particle Science and Engineering University of Leeds

Both linear-spring-dashpot （LSD） and non-linear Hertzian-spring-dashpot （HSD） contact models are commonly used for the calculation of contact forces in Discrete Element method （DEm） simulations of granular systems. Despite the popularity of these models, determination of suitable values for the contact parameters of the simulated particles such as stiffness, damping coefficient, coefficient of restitution, and simulation time step, is not altogether obvious. In this work the relationships between these contact parameters for a model system where a particle impacts on a flat base are examined. Recommendations are made concerning the determination of these contact parameters for use in DEm simulations.

关键词： Discrete Element method (DEm) Linear-spring--dashpot model Non-linear Hertzian-spring-dashpot model Contact parameters