检索结果-南通市图书馆

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

油动单旋翼植保无人机雾滴飘移分布特性

农业工程学报 2017年第1期33卷 117-123页

作者：王潇楠何雄奎王昌陵王志翀李龙龙王士林 jane·bonds Andreas·Herbst 王志国中国农业大学理学院北京100193 bonds Consulting Group LLC Panama City Florida 32408USA Institute for Chemical Application Technology ofJKI Messeweg 11/12 D-38104 BraunschweigGermany 安阳全丰航空植保科技有限公司安阳455001

为了研究油动单旋翼植保无人机在精准作业参数(速度、高度)条件下的雾滴飘移分布特性,该文建立了雾滴飘移收集测试平台,分别用雾滴飘移测试框架、等动量雾滴收集装置和培养皿收集3WQF80-10型油动单旋翼植保无人机在作业时空中及地面飘... 详细信息

为了研究油动单旋翼植保无人机在精准作业参数(速度、高度)条件下的雾滴飘移分布特性,该文建立了雾滴飘移收集测试平台,分别用雾滴飘移测试框架、等动量雾滴收集装置和培养皿收集3WQF80-10型油动单旋翼植保无人机在作业时空中及地面飘移的雾滴。将测试结果分别与侧风风速、飞行高度、飞行速度进行相关分析和回归分析,结果表明:在平均温度31.5℃、平均相对湿度34.1%的条件下,侧风风速为雾滴飘移的主要影响因素;侧风风速与等动量雾滴收集器和培养皿测得的雾滴飘移率呈正相关(相关系数r分别为0.97、0.93);而与雾滴飘移测试框架测得的雾滴飘移率无相关性;侧风风速为0.76~5.5 m/s时,90%飘移雾滴沉降在喷雾区域下风向水平距离9.3~14.5 m的范围内,因此在作业时要预留至少15 m以上缓冲区(安全区)以避免药液飘移产生的危害。研究结果可为低空低量植保无人机施药技术研究和建立植保无人机低空低量施药田间雾滴沉积与飘移测试标准提供参考。

关键词：无人机喷药风雾滴空中飘移地面飘移等动量雾滴收集器分布

基于空间质量平衡法的植保无人机施药雾滴沉积分布特性测试

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

农业工程学报 2016年第24期32卷 89-97页

作者：王昌陵何雄奎王潇楠王志翀王士林李龙龙 jane.bonds Andreas.Herbst 王志国梅水发中国农业大学理学院邦德斯咨询有限公司德国联邦作物研究中心植保施药技术研究所安阳全丰航空植保科技有限公司中国人民解放军61833部队

为了探究飞行方式、飞行参数及侧风等因素对无人机喷雾雾滴空间质量平衡分布和旋翼下旋气流场分布的影响,该文基于无人机施药雾滴空间质量平衡测试方法,测定了3WQF80-10型单旋翼油动植保无人机在不同飞行方式（前进、倒退）、飞行高度... 详细信息

为了探究飞行方式、飞行参数及侧风等因素对无人机喷雾雾滴空间质量平衡分布和旋翼下旋气流场分布的影响,该文基于无人机施药雾滴空间质量平衡测试方法,测定了3WQF80-10型单旋翼油动植保无人机在不同飞行方式（前进、倒退）、飞行高度和侧风速条件下的喷雾雾滴空间不同部位的沉积率和下旋气流风速。结果表明：对于该型无人机,在飞行高度（3.0±0.1）m、速度（5.0±0.2）m/s、1.2 m/s侧风速条件下,机头朝前与机尾朝前2种飞行方式对雾滴分布有显著影响,机尾朝前的飞行方式底部沉积比例可达60%,作业效果更佳;在2.0~3.5 m高度、（5.0±0.3）m/s速度和0.8 m/s侧风速条件下,空间质量平衡收集装置底部雾滴沉积率变异系数与高度呈现线性负相关,线性回归方程决定系数为0.9178,即高度越高雾滴分布均匀性越好;在（3.0±0.1）m高度和（5.0±0.3）m/s速度条件下,空间质量平衡收集装置底部雾滴加权平均沉积率与侧风风速呈线性正相关,线性回归方程决定系数为0.9684,即侧风速越大雾滴越集中分布在下风向处;飞行方式、高度和侧风3种因素对单旋翼无人机喷雾雾滴产生的影响都是通过改变其旋翼下旋气流场在垂直于地面向下方向的强度,减弱气流对雾滴的下压作用来实现的。研究结果可以为植保无人机设计定型、田间喷雾作业参数确定和作业条件的选择提供理论参考。

关键词：喷雾农药机械化植保无人机雾滴空间质量平衡飞行参数沉积

Psychological consequences of a diagnosis of infertility in men:a systematic analysis

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2024年第1期26卷 10-19页

作者： Sarah N Biggs jane Halliday Karin Hammarberg Reproductive Epidemiology Murdoch Children's Research InstituteMelbourne 3052Australia Department of Paediatrics University of MelbourneMelbourne 3052Australia Public Health and Preventative Medicine Monash UniversityMelbourne 3004Australia Victorian Assisted Reproductive Treatment Authority Melbourne 3000Australia

Almost half of infertility cases involve male *** the consequence of a diagnosis of male infertility,as a sole or partial contributor to the couples'infertility,to the mental health of men is required to ensure clinical care meets their psychological *** aim of this systematic analysis was to synthesize the evidence regarding whether men diagnosed with male factor infertility experience greater psychological distress than(1)men described as fertile and(2)men in couples with other infertility *** databases were searched using a combination of Medical Subject Headings(MeSH)headings and keywords relating to male infertility and psychological *** search yielded 1016 unique publications,of which 23 were included:8 case-control,14 prospective cohort,and 1 data linkage *** aspects of psychological distress were identified depression,anxiety,self-esteem,quality of life,fertility-related stress,general psychological stress or well-being,and psychiatric ***-control studies reported that men with male factor infertility have more symptoms of depression,anxiety and general psychological distress,worse quality of some aspects of life,and lower self-esteem than *** men with male factor infertility were compared to men in couples with other causes of infertility,there were few differences in the assessed aspects of psychological *** methodological limitations within the studies,this systematic analysis suggests that the experience of infertility,irrespective of its cause,negatively affects men's mental health and demonstrates the need for assisted reproduction technology(ART)providers to consider men undergoing assisted reproduction as individuals with their own unique support needs.

关键词： anxiety depression infertility male mental health quality of life

Deep Energies for Estimating Three-Dimensional Facial Pose and Expression

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications on Applied Mathematics and Computation 2024年第2期6卷 837-861页

作者： jane Wu Michael Bao Xinwei Yao Ronald Fedkiw Department of Computer Science Stanford University353 Jane Stanford WayStanfordCA 94305USA Epic Games 620 Crossroads BlvdCaryNC 27518USA

While much progress has been made in capturing high-quality facial performances using motion capture markers and shape-from-shading,high-end systems typically also rely on rotoscope curves hand-drawn on the *** curves are subjective and difficult to draw consistently;moreover,ad-hoc procedural methods are required for generating matching rotoscope curves on synthetic renders embedded in the optimization used to determine three-dimensional(3D)facial pose and *** propose an alternative approach whereby these curves and other keypoints are detected automatically on both the image and the synthetic renders using trained neural networks,eliminating artist subjectivity,and the ad-hoc procedures meant to mimic *** generally,we propose using machine learning networks to implicitly define deep energies which when minimized using classical optimization techniques lead to 3D facial pose and expression estimation.

关键词： Numerical optimization Neural networks Motion capture Face tracking

Anonymous TollPass: A Blockchain-Based Privacy-Preserving Electronic Toll Payment Model

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第6期79卷 3495-3518页

作者： jane Kim Soojin Lee Chan Yeob Yeun Seung-Hyun Seo Department of Electronic&Electrical Engineering Graduate SchoolHanyang UniversitySeoul04763Korea Department of Electrical Engineering and Computer Science Khalifa University of Science and TechnologyAbu Dhabi127788United Arab Emirates School of Electrical Engineering Hanyang UniversityERICAAnsan15588Korea

As big data,Artificial Intelligence,and Vehicle-to-Everything(V2X)communication have advanced,Intelligent Transportation Systems(ITS)are being developed to enable efficient and safe transportation *** Toll Collection(ETC),which is one of the services included in ITS systems,is an automated system that allows vehicles to pass through toll plazas without stopping for manual *** ETC system is widely deployed on highways due to its contribution to stabilizing the overall traffic system *** ensure secure and efficient toll payments,designing a distributed model for sharing toll payment information among untrusted toll service providers is ***,the current ETC system operates under a centralized ***,both toll service providers and toll plazas know the toll usage history of *** raises concerns about revealing the entire driving routes and patterns of *** address these issues,blockchain technology,suitable for secure data management and data sharing in distributed systems,is being applied to the ETC *** enables efficient and transparent management of ETC ***,the public nature of blockchain poses a challenge where users’usage records are exposed to all *** tackle this,we propose a blockchain-based toll ticket model named AnonymousTollPass that considers the privacy of *** proposed model utilizes traceable ring signatures to provide unlinkability between tickets used by a vehicle and prevent the identity of the vehicle using the ticket from being identified among the ring members for the ***,malicious vehicles’identities can be traced when they attempt to reuse *** conducting simulations,we show the effectiveness of the proposed model and demonstrate that gas fees required for executing the proposed smart contracts are only 10%(when the ring size is 50)of the fees required in previous studies.

关键词： Blockchain electronic toll collection smart contract traceable ring signature

Applying heteroatom co-doped carbon nanotube for manifesting high performance in the electrochemical reduction of aqueous nitrogen oxide by gold nanoparticles

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第3期17卷 1151-1164页

作者： jane Chung Haibo Yin Rong Wang Yunlong Wang Junyang Zhang Yue Peng Joung Woo Han Seongyun Ryu Junhua Li State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China EHS Research Center Samsung Electronics Co.Ltd.Gyeonggi-do 18448Republic of Korea

Electrochemical NO-to-NH_(3) under ambient conditions could be a viable alternative having advantages in terms of energy consumption and exhaust gas recycling of NO,replacing a traditional ammonia synthesis method of the Haber–Bosch *** synthesizing boron(B-)and nitrogen(N-)co-doped carbon nanotube(CNT)based gold(Au)catalysts,B-dopants elevate the conductivity of carbon nanotube by sp2 hybridization on graphene and implant B–N domains within the graphene layer,and result in facilitating the embedding amount of Au accompanied by high dispersibility with low particle *** density functional theory(DFT)calculations elucidate that the electron cloud transmitted from B-dopant to the active site of Au induces the Lewis acidic site,and the O-distal pathway occurs following a spontaneous *** of the electron-deficient B-doping area accompanied by N-defects and B–O edges retains the major valence state of Au as Au^(δ+),and suppresses hydrogen evolution reaction(HER)by repulsing the hindrance of H*.This record exhibits the highest faradaic efficiency(FE)of 94.7%,and NH_(3) yield rate of 1877.4μg·h^(-1)·mg_(cat)^(-1),which is the optimal yield over energy consumption in the field of the ambient reduction of aqueous NO.

关键词： boron heteroatom nitrogen defect gold nanoparticles valence states of gold electrochemical NO-to-NH3

Data,digital worlds,and the avatarization of health care

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Global Health Journal 2024年第1期8卷 1-3页

作者： jane Thomason Industry Associate Centre for Blockchain TechnologiesUniversity College LondonLondon WC1E 6BTUnited Kingdom

Significant technological trends are impacting health care,from consumerisation,datafication,circular economy,and platformization of *** 3.0,or the Internet of Value,enables direct peer-to-peer value exchange,opening up new business models that will impact health *** the many technologies that will also be part of the healthcare transformation is artificial intelligence,which shocked the world with the debut of ChatGPT in *** opinion piece will explore how AI underpins the health transformation and,far from being an enemy of health,is the critical friend health care has been waiting for.

关键词： Avatarization Artificial intelligence Big Tech ChatGPT Consumerization 5G Healthcare

Risk factors for hepatocellular carcinoma associated with hepatitis C genotype 3 infection:A systematic review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2024年第4期16卷 1596-1612页

作者： Hamzah Z Farooq Michael James jane Abbott Patrick Oyibo Pip Divall Naheed Choudhry Graham R Foster Blizard Institute Queen Mary University of LondonLondon E12ATUnited Kingdom School of Health and Psychological Sciences University of LondonLondon EC1V 0HBUnited Kingdom University Hospitals of Leicester Library University Hospitals of Leicester NHS TrustLeicester LE39QPUnited Kingdom

BACKGROUND Hepatitis C virus(HCV)is a blood-borne virus which globally affects around 79 million people and is associated with high morbidity and *** infection leads to cirrhosis in a large proportion of patients and often causes hepatocellular carcinoma(HCC)in people with *** the 6 HCV genotypes(G1-G6),genotype-3 accounts for 17.9%of *** genotype-3 responds least well to directly-acting antivirals and patients with genotype-3 infection are at increased risk of HCC even if they do not have *** To systematically review and critically appraise all risk factors for HCC secondary to HCV-G3 in all ***,we studied possible risk factors for HCC due to HCV-G3 in the literature from 1946 to *** This systematic review aimed to synthesise existing and published studies of risk factors for HCC secondary to HCV genotype-3 and evaluate their strengths and *** searched Web of Science,Medline,EMBASE,and CENTRAL for publications reporting risk factors for HCC due to HCV genotype-3 in all settings,*** Four thousand one hundred and forty-four records were identified from the four databases with 260 records removed as *** thousand eight hundred and eighty-four records were screened with 3514 *** hundred and seventy-one full-texts were assessed for eligibility with seven studies included for *** the seven studies,three studies were retrospective case-control trials,two retrospective cohort studies,one a prospective cohort study and one a cross-sectional study *** were based in hospital settings with four in Pakistan,two in South Korea and one in the United *** total number of participants were 9621 of which 167 developed HCC(1.7%).All seven studies found cirrhosis to be a risk factor for HCC secondary to HCV genotype-3 followed by higher age(five-studies),with two studies each showing male sex,high alpha feto-protein,directly-acting antivirals trea

关键词： Hepatocellular carcinoma Hepatitis C Genotype 3 Systematic review Blood-borne viruses Liver cancer

Environmental and Climate Justice in Palestine

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal of Climate Change 2024年第2期13卷 251-280页

作者： Jad Isaac jane Hilal Applied Research Institute-Jerusalem (ARIJ) Society Bethlehem Palestine Water and Enviromenat Department Applied Research Institute-Jerusalem Society (ARIJ) Society Bethlehem Palestine

To have a clean, safe, and functional environment is not only essential for the purpose of preservation, but also imperative for safeguarding the most fundamental of human rights. Resolution 45/94 of the United Nations (UN) General Assembly also stresses and acknowledges that: “all individuals are entitled to live in an environment adequate for their health and wellbeing” (United Nations Digital Library System, 1991). Environmental and climate justice, which: “emerged in the context of the local environmental struggles of directly oppressed groups”, is a global movement dedicated to ensuring equal protection of people’s human rights (i.e., water, health, life, etc.) in the face of the climate crisis. Moreover, health, environment and human rights are part of the 2030 agenda (in particular, SDG 1, SDG 5, SDG 6, SDG 7, SDG 13, SDG 16, SDG 17). Individually, both environmental and climate justice are rooted in an intersectional outlook, by which they highlight the common threads between communities and the people’s inclusion, irrespective of race, class, or gender, in the pursuit of justice. On the other hand, they recognise and acknowledge the role and consequences of climate change in economic, social, and political dimensions;thus, drawing emphasis on the rights of people under the emerging inequities. In the case of Palestine, the Palestinian community is increasingly becoming vulnerable to these effects and the resulting inequalities of climate change. This vulnerability stems from: 1) The right to life;clean WASH;equitable work opportunities;access to resources;and free movement;are all examples of human rights that the Israeli colonial regime infringes upon;2) Infrastructure is essential for climate adaptation: 61% of the West Bank is ultimately barred from building infrastructure (B’Tselem, 2019) and Gaza Strip has major gaps in infrastructure due to intentional destruction by Israel;3) Palestinian deprivation of the sovereign right to natural resources by Isra

关键词： Environmental Degradation Climate Change Environmental and Climate Justice Human Rights Causes and Solution