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Defect promoted photothermoelectric effect in densely aligned ZnO nanorod arrays for self-powered position-sensitive photodetection

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Journal of Materiomics 2022年第3期8卷 693-701页

作者： Xinxin Du Weiliang Tian Ziqi Zhang Bin Hui Jiahui Pan Jianhua Sun Kewei Zhang State Key laboratory of Bio-Fibers and Eco-Textiles Collaborative Innovation Center for Marine Biomass FibersMaterials and Textiles of Shandong ProvinceCollege of Materials Science and EngineeringInstitute of Marine Biobased MaterialsQingdao UniversityQingdao266071China Key laboratory of Chemical Engineering in South Xinjiang College of Life ScienceTarim UniversityAlar843300China Guangxi Key laboratory of Petrochemical Resource Processing and Process Intensification Technology Guangxi UniversityNanning530004China

Sustainable light energy from ambient environment has attracted particular attention to meet the evergrowing need of small-scale *** modulation of intercorrelated thermal and electronic transport is one of the crucial aspects for reliable photothermoelectric ***,a defectpromoted photothermoelectric effect is demonstrated in densely aligned ZnO nanorod array with rich lattice *** defect-rich ZnO device delivers high electrical conductivity and large Seebeck coefficient to enable significant improvement of photothermoelectric energy conversion and self-powered *** position sensitivity reaches approximately 0.19 mV mm^(-1),and the temperature gradient induced electric field makes up for the suppression in the photothermoelectric *** synergism between intrinsic defects and extra temperature field plays an important role in promoting the photothermoelectric properties of dense ZnO nanorod *** study is interesting for interpreting the thermo-phototronic phenomena as well as demonstrating the possibility of defect engineering and phonon engineering to enable highly efficient light energy scavenging and self-powered photodetection.

关键词： Defect-rich ZnO Photodetectors Light energy Photothermoelectric Self-powered

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Robust adaptive UKF based on SVR for inertial based integrated navigation

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Defence Technology（防务技术） 2020年第4期16卷 846-855页

作者： Meng-de Zhang Hai-fa Dai Bai-qing Hu Qi Chen College of Electrical Engineering Naval Univ.of EngineeringWuhan 430033China Qingdao Brigade Shandong Branch of the Armed Police Marine Police CorpsQingdao 266033China

Aiming at the problem that the traditional Unscented Kalman Filtering(UKF) algorithm can't solve the problem that the measurement covariance matrix is unknown and the measured value contains outliers,this paper proposes a robust adaptive UKF algorithm based on Support Vector Regression(SVR).The algorithm combines the advantages of support vector regression with small samples,nonlinear learning ability and online estimation capability of adaptive algorithm based on ***,the SVR model is trained by using the innovation in the sliding window,and the new innovation is *** the deviation between the estimated innovation and the measured innovation exceeds a given threshold,then measured innovation will be replaced by the predicted innovation,and then the processed innovation is used to calculate the measurement noise covariance matrix using the adaptive estimation *** experiments and measured data experiments show that SVRUKF is significantly better than the traditional UKF,robust UKF and adaptive UKF algorithms for the case where the covariance matrix is unknown and the measured values have outliers.

关键词： Integrated navigation Support vector regression Unscented Kalman filter Robust filter Adaptive filter

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Comparative Study on Effect of Chrysophyllum albidum and Irvingia gabonensis Leaves Extracts on High-Fat Diet-Induced Obesity in Wistar Rats

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Food and Nutrition Sciences 2022年第3期13卷 259-283页

作者： Osebhahiemen Ibukun A. Francis Obuseh S. Ehimwenma Omoregie Department of Biochemistry University of Medical Sciences Ondo Nigeria Department of Preventive Medicine Navy and Marine Corps Public Health Center Portsmouth VA USA Malaria Research Molecular Biology and Toxicology Unit Department of Biochemistry University of Benin Benin Nigeria

Leaves of Chrysophyllum albidum and Irvingia gabonensis have been reported to possess saponins, flavonoids, alkaloids, steroids and tannins which have several health benefits. This study investigated the anti-obesity effect of methanol extract of leaves of Chrysophyllum albidum and Irvingia gabonensis in high fat diet (HFD) fed rats. Male Wistar rats were fed with HFD for eight weeks to induce obesity. Rats in different groups were thereafter treated with extracts of Chrysophyllum albidum (250 and 500 mg/kg;p.o), Irvingia gabonensis (250 and 500 mg/kg;p.o) or the reference anti-obesity drug (orlistat®20 mg/kg, p.o) for four weeks. Body weight, body mass index (BMI) and Lee’s index were recorded. Following sacrifice of the rats, weight of adipose tissues (retroperitoneal and epididymal fat), serum lipid profile, kidney function markers, liver and cardiac function enzymes were measured. Histopathological examination of the liver and kidney tissues were carried out. Obese rats treated with Chrysophyllum albidum, Irvingia gabonensis or orlistat showed normal body weights. Weights of adipose tissues, BMI and Lee’s index were comparable with those of normal control [normal fat diet (NFD) fed rats]. Also, serum analysis showed that orlistat and extracts treated rats had restored lipid profile, liver, kidney and cardiac function parameters in contrast with the untreated HFD fed obese group. Furthermore, liver and kidney of orlistat and extracts treated groups showed normal architecture while those of the untreated HFD group showed inflammation and hepatic steatosis. Findings from the study suggest that methanol extracts of Chrysophyllum albidum and Irvingia gabonensis leaves have anti-obesity and anti-hyperlipidaemic properties. Comparatively, extract of Irvingia gabonensis appeared to be a better suppressor of adiposity than extract of Chrysophyllum albidum.

关键词： Obesity Chrysophyllum albidum Irvingia gabonensis Body Mass Index Lee’s Index Adipose Tissues

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First molecular identification of multiple tick‑borne pathogens in livestock within Kassena‑Nankana,Ghana

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Animal Diseases 2023年第1期3卷 21-34页

作者： Seth Offei Addo Ronald Essah Bentil Kevin Nii Yartey Jane Ansah‑Owusu Eric Behene Selassie Bruku Victor Asoala Suzanne Mate John Asiedu Larbi Philip Kweku Baidoo Michael David Wilson Joseph W.Diclaro II Samuel K.Dadzie Parasitology Department Noguchi Memorial Institute for Medical ResearchCollege of Health SciencesUniversity of GhanaAccraGhana Department of Theoretical and Applied Biology College of ScienceKNUSTKumasiGhana Department of Epidemiology Noguchi Memorial Institute for Medical ResearchCollege of Health SciencesUniversity of GhanaAccraGhana Navrongo Health Research Centre Upper East RegionNavrongoGhana U.S.Army Emerging Infectious Diseases Branch Walter Reed Army Institute of ResearchSilver SpringMDUSA Navy and marine corps Public Health Center Center for Disease Control and Prevention DetachmentAtlantaGAUSA

The risk of pathogen transmission continues to increase significantly in the presence of tick vectors due to the trade of livestock across *** Ghana,there is a lack of data on the incidence of tick-borne pathogens that are of zoonotic and veterinary *** study,therefore,aimed to determine the prevalence of such pathogens in livestock using molecular approaches.A total of 276 dry blood spots were collected from cattle(100),sheep(95)and goats(81)in the Kassena-Nankana *** samples were analyzed using Polymerase Chain Reaction(qPCR)and conventional assays and Sanger sequencing that targeted pathogens including Rickettsia,Coxiella,Babesia,Theileria,Ehrlichia and *** overall prevalence of 36.96%was recorded from the livestock DBS,with mixed infections seen in 7.97%***,the prevalence of infections in livestock was recorded to be 19.21%in sheep,14.13%in cattle,and 3.62%in *** pathogens identified were Rickettsia spp.(3.26%),Babesia ***(8.70%),Theileria orientalis(2.17%),Theileria parva(0.36%),Anaplasma capra(18.48%),Anaplasma phagocytophilum(1.81%),Anaplasma marginale(3.26%)and Anaplasma ovis(7.25%).This study reports the first molecular identification of the above-mentioned pathogens in livestock in Ghana and highlights the use of dry blood spots in resource-limited *** addition,this research provides an update on tick-borne pathogens in Ghana,suggesting risks to livestock production and human *** studies will be essential to establish the distribution and epidemiology of these pathogens in Ghana.

关键词： Livestock Rickettsia Babesia Theileria Ehrlichia Anaplasma

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Providing refuges for adult Pacific lamprey Entosphenus tridentatus inside fishways

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Aquaculture and Fisheries 2021年第2期6卷 144-150页

作者： Mary L.Moser Matthew L.Keefer Stephen C.Corbett Kinsey E.Frick Christopher C.Caudill Sean C.Tackley Northwest Fisheries Science Center National Marine Fisheries ServiceNational Oceanic and Atmospheric AdministrationSeattleWA98112USA Department of Fish and Wildlife Sciences College of Natural ResourcesUniversity of IdahoMoscowID83844-1136USA Ocean Associates ArlingtonVA22207USA U.S.Army corps of Engineers Environmental Resources BranchPortlandOR97204-3440USA

Fishways at hydroelectric dams are unnatural environments that typically present fish with channels of uniform depth,variable water velocity,and lack of *** retention and overall passage success may be improved by providing rest and sheltering areas inside *** examined adult Pacific lamprey Entosphenus tridentatus use of two specially designed fishway refuges at Bonneville Dam on the Columbia River(northwestern USA).These relatively small boxes(1.1 m×0.4 m×0.2 m)provided low-velocity,dark refuge from predation for Pacific lamprey,a largely nocturnal *** boxes were equipped with antennas to detect entry of lamprey tagged with passive integrated transponder(PIT)*** PIT tagged and released 3,247 lamprey,including 599 that were double-tagged with a PIT and a radio transmitter,over three study years(2012-2014).In each year,PIT-tagged lamprey detected at nearby fishway exits had used a refuge:12%in 2012,28%in 2013,and 36%in *** residence time of PIT-tagged lamprey in the refuges for each year was 20.3 h,16.6 h,and 13.1 *** entrance into refuges peaked at 0300-0500 PDT,and they typically exited at around 2000 PDT,suggesting that refuges primarily functioned as shelter from *** of refuge use increased with a morphological indicator of sexual maturity(distance between dorsal fins).In the radio-tagged group,refuge users were equally likely to pass Bonneville Dam as ***,refuge users were less likely than non-users to be detected at sites upstream from the dam,perhaps owing to their maturation status or longer mean passage time through our study area(2.0 vs.0.6 d for non-users).Refuges show promise for improving fish retention in fishways,particularly for nocturnal and/or small-bodied species that seek shelter from light or predation.

关键词： fish passage retention

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Dynamic analysis of multibodies system with a floating base for rolling of ro-ro ship caused by wave and slip of heavy load

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Journal of marine Science and Application 2003年第2期2卷 17-24页

作者： Qing Shen Yue Li and Xu-jun Chen The Engineering Institute of Engineer corps PLA University of Science and Technology Nanjing 210007China

Common effect of wave and slip of internal heavy load will make rolling of the roll-on ship serious. This is one of the important reasons for overturn of ro-ro ships. The multibodies System with a floating base is composed of ro-ro ship and slipping heavy load. This paper takes the rolling angle of the ship and the transverse displacement of the heavy load on desk as two freedoms. Making use of analysis of apparent gravitation and apparent buoyancy, the wave rolling moment is derived. By use of dynamic method of multibodies system with a floating base, dynamic equations of the system are established. Taking a certain channel ferry as an example, a set of numerical calculation have been carried out for rolling response of the ship and displacement response of the slipping heavy load under common effect of synchro-slipping heavy loads and wave.

关键词：动力学分析多体系统船舶动力学 ro-ro船起伏角度起重船

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用文献计量数据解读中国和印度的科技发展

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科学观察 2007年第4期2卷 1-6页

作者： Ronald N. Kostoff Michael B. Briggs Robert L. Rushenberg Christine A. Bowles Sujit Bhattacharya Dustin Johnson Alan S. Icenhour Kimberly Nikodym Ryan B. Barth Simha Dodbele Michael Pecht 朱海峰 Office of Naval Research 875 N.Randolph St.ArlingtonVA 22217USA. marine corps warfighting laboratory 3255 Meyers AveQuanticoVA 22134USA. DDL-OMNI Engineering LLC8260 Greensboro DriveMcLeanVA 22102USA. National Institute of Science Technology and Development StudiesPusa GateK.S.Krishnan MargNew Delhi-110012India. Office of Naval Research 875 N. Randolph St.ArlingtonVA 22217USA. University of Maryland College ParkMD 20742USA.

该文采用SCI/SSCI数据库,对通信联系人中至少含有一位印度/中国人的科技论文进行了文献计量学和计算语言学分析。依据对印度和中国科技文献单独分析的结果,深入地探讨了两国在科技领域的差异。借助不同的分析技术,包括影响因子分析、相... 详细信息

该文采用SCI/SSCI数据库,对通信联系人中至少含有一位印度/中国人的科技论文进行了文献计量学和计算语言学分析。依据对印度和中国科技文献单独分析的结果,深入地探讨了两国在科技领域的差异。借助不同的分析技术,包括影响因子分析、相关性图解以及文档聚类(传统聚类和模糊聚类),多角度地分析了中国和印度科技文献的基本学科结构体系(主要作者、研究单位等)与主要学科结构(学科重点以及学科重点之间的关系)。第一部分内容介绍了中国科技文献评估,第二部分阐述了印度科技文献评估,第三部分则为印度和中国科研成果的多角度比较。

关键词：中国印度科学技术研究评价研究评估技术评估文本挖掘文献计量学计算语言学文档聚类因子分析相关图核心竞争力

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Assessing nest attentiveness of Common Terns via video cameras and temperature loggers

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Avian Research 2020年第3期11卷 284-301页

作者： Jeffery D.Sullivan Paul R.Marbán Jennifer M.Mullinax David F.Brinker Peter C.McGowan Carl R.Callahan Diann J.Prosser Natural Systems Analysts Winter ParkFL 32789USA marine Estuarineand Environmental Sciences ProgramUniversity of MarylandCollege ParkMD 20742USA Department of Environmental Science and Technology University of Maryland1443 Animal Sciences BldgCollege ParkMD 20742USA Department of Natural Resources Maryland Natural Heritage ProgramAnnapolisMD 21401USA Chesapeake Bay Field Office U.S.Fish and Wildlife ServiceAnnapolisMD 21401USA U.S.Geological Survey Patuxent Wildlife Research CenterLaurelMD 20708USA.

Background:While nest attentiveness plays a critical role in the reproductive success of avian species,nest attentiveness data with high temporal resolution is not available for many ***,improvements in both video monitoring and temperature logging devices present an opportunity to increase our understanding of this aspect of avian ***:To investigate nest attentiveness behaviors and evaluate these technologies,we monitored 13 nests across two Common Tern(Sterna hirundo)breeding colonies with a paired video camera-temperature logger approach,while monitoring 63 additional nests with temperature loggers *** occurred from May to August of 2017 on Poplar(Chesapeake Bay,Maryland,USA)and Skimmer Islands(Isle of Wight Bay,Maryland,USA).We examined data respective to four times of day:Morning(civil dawn‒11:59),Peak(12:00‒16:00),Cooling(16:01‒civil dusk),and Night(civil dusk‒civil dawn).Results:While successful nests had mostly short duration off-bouts and maintained consistent nest attentiveness throughout the day,failed nests had dramatic reductions in nest attentiveness during the Cooling and Night periods(p0.05),video-monitored nests did have significantly lower clutch sizes(p<0.05).Conclusions:The paired use of iButtons and video ca

关键词： Common Tern iButton Nest attentiveness Sterna hirundo Temperature logger Video monitoring

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