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Fast and extensive intercalation chemistry in Wadsley-Roth phase based high-capacity electrodes

Journal of Energy Chemistry 2022年第6期31卷 601-611,I0017页

作者： Miao Wang Zhenpeng Yao Qianqian Li Yongfeng Hu Xiuping Yin Aibing Chen Xionggang Lu Jiujun Zhang Yufeng Zhao Institute for Sustainable Energy&College of Sciences Shanghai UniversityShanghai 200444China Department of Chemistry and Chemical Biology Harvard University12 Oxford StreetCambridgeMA 02138United States Materials Genome Institute Shanghai UniversityShanghai 200444China canadian light source 44 Innovation BoulevardSaskatoonSK S7N 2 V3Canada College of Chemical and Pharmaceutical Engineering Hebei University of Science and Technology70 Yuhua RoadShijiazhuang 050018China State Key Laboratory of Advanced Special Steel Shanghai Key Laboratory of Advanced FerrometallurgyShanghai UniversityShanghai 200444 China Key Laboratory of Applied Chemistry Yanshan UniversityQinhuangdao 066004HebeiChina School of Resource and Environmental Sciences Wuhan UniversityWuhan 430072HubeiChina

Wadsley-Roth (W-R) structured oxides featured with wide channels represent one of the most promising material families showing compelling rate performance for lithium-ion ***,we report an indepth study on the fast and extensive intercalation chemistry of phosphorus stabilized W-R phase PNb_(9)O_(25) and its application in high energy and fast-charging *** explore the intercalation geometry of PNb_(9)O_(25) and identify two geometrical types of stable insertion sites with the total amount much higher than conventional intercalation-type *** reveal the ion transportation kinetics that the Li ions initially diffuse along the open type Ⅲ channels and then penetrate to edge sites with low kinetic *** the lithiation,no remarkable phase transition is detected with nearly intact host phosphorous niobium oxide ***,the oxide framework of PNb_(9)O_(25) keeps almost unchanged with all the fast diffusion channels and insertion cavities well-maintained upon cycling,which accomplishes the unconventional electrochemical performance of W-R structured electrodes.

关键词： Wadsley-Roth phase PNb_(9)O_(25) Intercalation chemistry Ion transportation kinetics Lithium-ion batteries

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Uniformly dispersed FeOx atomic clusters by pulsed arc plasma deposition： An efficient electrocatalyst for improving the performance of Li-O2 battery

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Nano Research 2016年第7期9卷 1913-1920页

作者： Xiangyi Luo Jun Lu Evan Sohm Lu Ma Tianpin Wu Jianguo Wen Dantong Qiu YunKai Xu Yang Ren Dean J. Miller Khalil Amine Material Sciences Division Argonne National Laboratory Argonne IL 60439 USA Chemical Sciences and Engineering Division Argonne National Laboratory Argonne IL 60439 USA ULVAC Technologies Inc. Methuen MA 01844 USA Center for N anoscale Materials Nanoscience and Technology Argonne National Laboratory Argonne IL 60439 USA Advanced Photon Source Argonne National Laboratory Argonne IL 60439 USA Center for Nanoscale Materials Nanoscience and Technology Argonne Notional Laboratory Argonne IL 60439 USA

The present study explored a new method to improve the catalytic activity of non-precious metals, especially in electrochemical reactions. Highly ionized Fe plasma produced by arc discharge was uniformly deposited on a porous carbon substrate and formed atomic clusters on the carbon surface. The as-prepared FeO~/C material was tested as a cathode material in a rechargeable Li-02 battery under different current rates. The results showed significant improvement in battery performance in terms of both cycle life and reaction rate. Furthermore, X-ray diffraction （XRD） and scanning electron microscopy （SEM） results showed that the as-prepared cathode material stabilized the cathode and reduced side reactions and that the current rate was a critical factor in the nucleation of the discharge products.

关键词： Li-O2 battery FeOx atomic cluster electrocatalyst pulsed arc plasmadeposition (APD)

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Single-arm phase II three-outcome designs with handling of over-running/under-running

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Statistical Theory and Related Fields 2023年第4期7卷 276-286页

作者： Wenchuan Guo Jianan Hui Bob Zhong Seagen inc. BothellWAUSA Servier Pharmaceuticals BostonMAUSA Regeneron Pharmaceuticals TarrytownNYUSA

Phase II clinical trials are commonly conducted as pilot studies to evaluate the efficacy and safety of the investigational drug in the targeted patient population with the disease or condition to be treated or *** designing such a trial considering efficacy conclusions,people natu-rally think as follows:if efficacy evidence is very strong,a go decision should be made;if efficacy evidence is very weak,a no-go decision should be made;if the efficacy evidence is neither strong nor weak,no decision can be made(inc.nclusive).The designs presented in this paper match this natural thinking process with go/no-go/inc.nclusive *** two-/three-stage designs are developed with three ***,a general approach based on conditional error function is implemented such that new decision boundaries can be calculated to handle mid-course sample size change which results in either‘over-running’or‘under-running’and ensure the control of overall type I error.A free open-source R package tsdf that calculates the proposed two-/three-stage designs is available on CRAN.

关键词： Phase II trials two-stage and three-stage designs go/no-go/inc.nclusive outcomes asymmetric alpha alpha spending optimal designs over-running and under-running

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On reservoir boundary detection with marine CSEM

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Applied Geophysics 2008年第3期5卷 181-188页

作者：何展翔 Kurt Strack 余刚王志刚 BGP CNPC KMS Technologies-KJT Enterprises Inc.

After decades of research and development, Marine Controlled source ElectroMagnetics （MCSEM） has come into the application phase for oil and gas exploration. However, presently 3D modeling of MCSEM is far from practical with simple models and much computing time. Based on a forward modeling study of 3D frequency-domain MCSEM over a complicated target body and its sensitivity analysis, we derive a method which can delineate the edges of the resistive reservoir. We use the second derivative of the magnitude versus offset （MVO） curve to define the resistive reservoir edges. For the air-wave-dominated far field zone, we suggest using the less affected apparent resistivities in order to improve the adaptability of the method.

关键词： reservoir boundary detection 3D modeling MCSEM

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New therapeutic option for irritable bowel syndrome:Serum-derived bovine immunoglobulin

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World Journal of Gastroenterology 2015年第11期21卷 3361-3366页

作者： Larry Good Roxanne Rosario Raymond Panas Department of Gastroenterology South Nassau Communities Hospital Department of Research Good Pharmaceutical Development Company Department of Medical Affairs Entera HealthInc.

Oral prescription medical foods have long been used in hospital settings but are also appropriate therapies for gastrointestinal disorders in outpatient medical *** serum-derived bovine immunoglobulin/protein isolate(SBI) has been shown in clinical studies to reduce loose stools and improve stool consistency as well as other symptoms(i.e.,abdominal pain,bloating,and urgency) in patients with irritable bowel syndrome with diarrhea(IBS-D) and human immunodeficiency virus-associated *** case series reports the outcomes of 14 IBS patients who received SBI as an addition to standard of care at an individual physician's clinical *** patients:2 IBS with constipation(IBS-C),7 IBS-D,2 mixed diarrhea and constipation IBS(IBS-M) and 3 undefined IBS(IBS-U; also described by some physicians as IBS-Bloating),ranged in age from 22-87 ***(5 g or 10 g daily dose) was added to the patient's current standard care and followed for several weeks to determine if symptoms were improved with the addition of ***,12 of the 14 patients indicated some level of improvement through direct questioning of the patients regarding changes from the prior *** IBS-Bloating patient had a resolution of symptoms and two patients(1 IBS-Bloating and 1 IBS-C) discontinued therapy because of insufficient *** 12 patients who continued on therapy reported an overall improvement in symptoms with better stool consistency,decreased frequency as well as reductions in abdominal pain,bloating,distention,and *** most cases,therapeutic effects of SBI were seen within the first four weeks of therapy with continued improvements at subsequent *** has a multifaceted mechanism of action and may help to manage IBS by providing a distinc. protein source required to normalize bowel function,gastrointestinal microbiota,and nutritionally enhance tight junction protein expression between intestinal epithelial *** as a medical food provides a safe o

关键词： Irritable bowel syndrome Diarrhea Immu-noglobulin

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Prophet_TD Routing Algorithm Based on Historical Throughput and Encounter Duration

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Computers, Materials & Continua 2020年第9期64卷 1845-1858页

作者： Jingjian Chen Gang Xu Fengqi Wei Liqiang He College of Computer Science Inner Mongolia UniversityHuhehot010000China Geomechanica inc. TorontoM5H 2Y2Canada

Opportunistic networks are self-organizing networks that do not require a complete path between the source node and the destination node as it uses encounter opportunities brought by nodes movement to achieve network *** networks routing algorithms are numerous and can be roughly divided into four categories based on different forwarding *** Prophet routing algorithm is an important routing algorithm in opportunistic *** forwards messages based on the encounter probability between nodes,and has good innovation significance and optimization ***,the Prophet routing algorithm does not consider the impact of the historical throughput of the node on message transmission,nor does it consider the impact of the encounter duration between nodes on message ***,to improve the transmission efficiency of opportunistic networks,this paper based on the Prophet routing algorithm,fuses the impact of the historical throughput of the node and the encounter duration between nodes on message transmission at the same time,and proposes the Prophet_TD routing algorithm based on the historical throughput and the encounter *** paper uses the Opportunistic Networks Environment v1.6.0(the ONE v1.6.0)as the simulation platform,controls the change of running time and the number of nodes respectively,conducts simulation experiments on the Prophet_TD routing *** simulation results show that compared to the traditional Prophet routing algorithm,on the whole,the Prophet_TD routing algorithm has a higher message delivery rate and a lower network overhead rate,and its average latency is also lower when node density is large.

关键词： Opportunistic networks encounter probability historical throughput encounter duration

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Bladder Cancer and Arsenic Exposure: Differences in the Two Populations Enrolled in A Study in Southwest Taiwan

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Biomedical and Environmental Sciences 2003年第4期16卷 355-368页

作者： STEVENH.LAMM DANIELM.BYRD MICHAELB.KRUSE MANNINGFE1NLEIB SHENG-HANLAI ConsultantsinEpidemiologyandOccupationalHealth Inc.WashingtonDC20007USA UonsultantsinToxicology RiskAssessmentandProductSafetyWashingtonDC20024USA JohnsHopkinsUniversity-BloombergSchoolofPublicHealth BaltimoreMD21202USA

Objective Analyses of bladder cancer mortality in the Black Foot Disease (BFD) endemic area of southwest Taiwan conducted by Morales et al. showed a discontinuity in risk at 400μg/L arsenic in the drinking water in a stratified analysis and no discontinuity in a continuous analysis. As the continuous analysis presentation had been used by both the NRC and the EPA to assess the carcinogenic risk from arsenic ingestion, an explanation of the discontinuity was sought. Methods Review of 40 years of published health studies of the BFD-endemic area of SW Taiwan showed that earlier publications had limited their cancer associations with arsenic levels in artesian well waters and that the reports of Morales et al., NRC, and EPA failed to do so. Underlying data for the Morales et al. study were obtained from the appendix to the NRC report. Bladder cancer mortality rates were calculated from case counts and person-years of observation for each study village. Villages were categorized by water source according to the descriptions from the underlying study. Graphic and regression analyses were conducted of the bladder cancer mortality rates using exposure as a continuous variable and simultaneously stratifying by water source. Results The median village well arsenic levels ranged from 350 to 934μg/L for villages solely dependent on artesian well water and from 10 to 717μg/L for villages not solely dependent on artesian well water. Bladder cancer mortality rates were found to be dependent upon the arsenic level only for those villages that were solely dependent on artesian well water for their water source. Bladder cancer mortality rates were found to be independent of arsenic level for villages with non-artesian well water sources. Conclusions The data indicate that arsenic exposure levels do not explain the bladder cancer mortality risk in SW Taiwan among villages not dependent upon artesian well water. The association for villages dependent upon artesian well water may be exp

关键词： Arsenic ingestion Bladder cancer Dose-response Non-linear SW Taiwan Cancer risk

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2007年激光市场和技术(英文)

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实验力学 2007年第3期22卷 229-235页

作者：马要武 QPC Lasers inc.

本文叙述了2007年激光市场及相关的技术状况。2007年的激光市场规模预计为60亿美元,比去年增加8 %。半导体激光器的销售额占总数的一半以上。半导体激光器的主要应用是光学数据储存和长途光通讯。非半导体激光器具有比较强大的激光能力... 详细信息

本文叙述了2007年激光市场及相关的技术状况。2007年的激光市场规模预计为60亿美元,比去年增加8 %。半导体激光器的销售额占总数的一半以上。半导体激光器的主要应用是光学数据储存和长途光通讯。非半导体激光器具有比较强大的激光能力和广泛的应用,但是比较复杂。非半导体激光器主要用于与半导体及汽车商业有关的材料加工。非半导体激光器的第二个用途是与整容化妆有关的医学治疗。光纤激光器是最有魅力的非半导体激光器。

关键词：激光激光市场激光技术激光光源激光器激光应用

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Tracing sediment transport history using mineralogical fingerprinting in a river basin with dams utilizing sediment sluicing

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International Journal of Sediment Research 2023年第3期38卷 469-480页

作者： Kenichi Ito Motohide Matsunaga Tomoya Itakiyo Hiroyuki Oishi Kei Nukazawa Mitsuteru Irie Yoshihiro Suzuki Center for International Relations University of Miyazaki Department of Civil and Environmental Engineering Faculty of Engineering University of Miyazaki Oita Prefectural Government West Japan Engineering Consultants inc.

Sediment causes a serious problem in relation to dam function. A cooperative sediment sluicing operation has been under way sinc. 2017 to prevent sediment from accumulating in dams in the Mimi River,Miyazaki, Japan. To achieve a smooth and stable operation, it is very important to determine the sediment source and a sediment transport system to maintain the dam’s function. In the current study, the source and transport of sediment from the Mimi River basin have been analyzed with X-ray diffraction(XRD) to reveal the peaks of mineral species. The sediment samples were collected in the Mimi River basin from the Tsukabaru Dam to the sea in an area inc.uding 4 dams and 5 tributaries. In addition, the minerals in samples collected in 2014, before the start of the sediment sluicing operation, and from 2018 to 2020, after the start of the operation, were analyzed. An evaluation of the similarity of the sediment at each sampling point based on the X-ray diffraction peaks of mineral species showed that sediment distributed upstream was transported downstream in the year when the sediment sluicing was *** result indicates that the sediment sluicing operation at dams ensured the continuity of the sediment distribution in the Mimi River basin. In addition, an investigation done in 2020 showed that sediment particles very similar to those of the upstream tributaries were deposited downstream because of extensive flooding caused by a large typhoon. The management of sediment transport has the greatest importance in a river basin where a dam is to be constructed. It is possible to trace the history of the sediment distribution and movement resulting from the operation of sediment sluicing by using sediment mineral analysis.

关键词： Sediment sluicing Sediment source X-ray diffraction (XRD) Mineralogical analysis Cluster analysis

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XANES技术探究酸处理对义马煤中硫形态及其热变迁行为的影响

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燃料化学学报 2020年第6期48卷 641-648,I0001页

作者：王美君申岩峰郭江 HU Yong-feng 孔娇常丽萍太原理工大学煤科学与技术教育部和山西省重点实验室山西太原030024 canadian light source Saskatoon SK S7N 2V3

利用XANES技术研究了酸处理对义马煤的比表面积、体相及表面硫形态分布和热解过程中硫变迁行为的影响。结果表明,由于酸处理过程中部分镶嵌于有机质中的矿物质被脱除导致部分闭合孔打开,煤的比表面积有所增大。HCl-HF和HCl-HF-HNO3处理... 详细信息

利用XANES技术研究了酸处理对义马煤的比表面积、体相及表面硫形态分布和热解过程中硫变迁行为的影响。结果表明,由于酸处理过程中部分镶嵌于有机质中的矿物质被脱除导致部分闭合孔打开,煤的比表面积有所增大。HCl-HF和HCl-HF-HNO3处理脱除了煤中大部分矿物质和无机硫,由于HNO3的强氧化性,YMN中亚砜和砜硫化物的相对含量均高于YMR和YMD。相比煤样体相,酸处理过程对表面形态硫的分布产生了更为明显的影响。酸处理煤样热解含硫气体释放量减少,但由于大部分碱性矿物质的脱除和煤中易分解形态硫相对含量的增加,含硫气体释放率增加。不同形态硫之间的内部转化使得酸处理煤焦中主要形态硫的分布更为均匀。通过HCl-HF-HNO3处理可以有效地脱除煤中矿物质及无机硫,并改变煤中形态硫分布,从而为高灰分、富含黄铁矿的高硫煤的利用提供指导。

关键词： XANES 酸处理热解硫形态变迁行为

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