检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

建筑工程通风空调常见问题分析

施工技术 2020年第S1期49卷 1650-1653页

作者：李胜旺宋颖召中交第四公路工程局有限公司北京100022

从设计、施工、运行维护等几个方面列举了房建项目中通风空调系统的一些常见问题。

关键词：通风空调设计施工

浅析边际物流系统在工矿企业物流管理中的应用

在线全文

学校读者我要写书评

暂无评论

现代制造技术与装备 2017年第9期53卷 169-170页

作者：李元哲苏沂峰李生旺临沂市科学技术合作与应用研究院临沂276000 山东孚名控制设备有限公司临沂276000

本文介绍了边际物流系统的组成,分析了其三个子系统的组成和功能,解决了大物流首尾不能相顾的问题。

关键词：边际物流车辆识别计量监控

Trends in Injury-related Incidence and Mortality Among Inpatients in Guangdong Province in 1997-2001

在线全文

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2004年第3期17卷 333-340页

作者： li-PINGli shengwang InjuryPreventionResearchCenter ShantouUniversityMedicalCollegeShantou515031GuangdongChina／／22XinlingRoadInjuryPreventionResearchCentreMedicalCollegeS.han.touUniversityShantou515031GuangdongChina SchoolofPublicHealth BeijingUniversityBeijing100083China

Objective Currently, China is in short of thorough and systemic data concerning the patterns and incidence of injuries and related deaths. Guangdong Province as one of the economically advanced areas in China is faced with a relatively serious injury problem, and investigation of this problem in this Province will provide valuable information for other provinces and areas in this Country, as well as scientific basis for policy making for injury prevention and control. Methods Analyses are based on the computerized hospital discharge data collected from 322 hospitals in Guangdong Province between 1997 and 2001. Diagnoses are coded according to the International Classification of Diseases, 9th Revision, Clinical Modification (ICD-9-CM). Results The total hospitalization rate related with injuries increased year by year from 1997 to 2001. The ratio of case-fatality has a decline trend for all injury inpatients, who were mainly caused by motor vehicle accidents, unintentional falls, puncture and cut by machine and others. The constituent ratio of death among patients caused by motor vehicle accidents accounted for 56.13% among the total deaths, which ranked as the first place. The direct medical cost also had an increased trend. Conclusions Data on injuries requiring hospitalization can be used to design and target more effective injury prevention programs. Injury prevention would decrease human sufferings, disability, and associated economic losses.

关键词： Injury Hospitalization Motor vehicle accident Medical care costs

在线全文

学校读者我要写书评

暂无评论

文本方面级情感分类方法综述

河北科技大学学报 2020年第6期41卷 518-527页

作者：李胜旺杨艺许云峰张妍河北科技大学信息科学与工程学院河北石家庄050018

随着深度学习的发展,方面级情感分类已经在单领域和单一语言中取得了大量的研究成果,但是在多领域的研究还有提升的空间。通过对近年来文本方面级情感分类方法进行归纳总结,介绍了情感分类的具体应用场景,整理了方面级情感分类常用的数... 详细信息

随着深度学习的发展,方面级情感分类已经在单领域和单一语言中取得了大量的研究成果,但是在多领域的研究还有提升的空间。通过对近年来文本方面级情感分类方法进行归纳总结,介绍了情感分类的具体应用场景,整理了方面级情感分类常用的数据集,并对方面级情感分类的发展进行了总结与展望,提出未来可在以下领域开展深入研究:1)探索基于图神经网络的方法,弥补深度学习方法存在的局限性;2)学习融合多模态数据,丰富单一文本的情感信息;3)开展更多针对多语言文本和低资源语言的研究。

关键词：自然语言处理情感分类方面级别文本分类深度学习图神经网络图卷积网络

A Survey on Injury Incidence in School Children in Shantou City, China

在线全文

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2003年第2期16卷 180-186页

作者： li-PINGli shengwang GEHUANG JIA-YILUO InjuryPreventionResearchCenter ShantouUniversityMedicalSchoolShantouGuangdong515031China SchoolofPublicHealth BeijingUniversityBeijing100083China.

To study incidence characteristics and causes of injury, and its medical consequences in school children of China. Methods A total of 2 553 school children aged 7-16 years were recruited from Shantou City in Gunagdong by cluster sampling method, and were investigated with questionnaires on cases of injuries occurred among them from October 1, 1996 to September 30, 1997. Results Injuries tended to increase with children抯 age, with an overall incidence rate of 37.96%, higher in boys than in girls (Plicted injury ranked the first place of all injuries, followed by hurt caused by others (classmates, sibling or others). Moderate and serious injuries accounted for 8% of the total with a disability rate of 121.4/100 000. Conclusions Currently, injury has become one of the serious public health problems in China. For the improvement of children survival, it is crucial to reduce their injury to strengthen research on child safety and to implement safety-promotion programs.

关键词： Incidence Falls Disability Injury Child

Allometric biomass equations of Larix sibirica in the Altay Mountains, Northwest China

在线全文

学校读者我要写书评

暂无评论

Journal of Arid Land 2019年第4期11卷 608-622页

作者： li Yuanyuan liU Qijing MENG shengwang ZHOU Guang Key Laboratory of Forest Cultivation Department of Forest SciencesBeijing Forestry UniversityBeijing100083China Agricultural College Shihezi UniversityShihezi832000China Qianyanzhou Ecological Research Station Key Laboratory of Ecosystem Network Observation and ModelingInstitute ofGeographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing100101China

Boreal forests are important carbon sinks and have tremendous potential to mitigate climate change. Aboveground biomass of Siberian larch(Larix sibirica Ledeb.) stands in the Altay Mountains, Northwest China was studied and allometric equations that are related to the biomass of aboveground components using diameter at breast height(DBH) or both DBH and height(H) as independent variables for L. sibirica trees were derived in this paper. A linear simultaneous equation system by using either DBH or both DBH and H(DBH&H) indices, was used to ensure additivity of the biomass of individual tree components, and was fitted for L. sibirica. Model performance was validated using the jackknifing test. Results indicate that the goodness-of-fit for the regressions was lowest for the needles(R^2 ranging from 0.696 to 0.756), and highest for the stem wood(R^2 ranging from 0.984 to 0.997) and the aggregated biomass components(R^2 ranging from 0.994 to 0.995). The coefficient of determination for each component was only marginally improved in terms of model fit and performance in the biomass equations that used DBH&H as the independent variables compared to that used DBH as the independent variable, and needles yielded an even worse fit. Stem biomass accounted for the largest proportion(87%) of the aboveground biomass. Based on the additive equations that used DBH as the single predicitor in this study, the mean aboveground carbon stock density and the carbon storage values of L. sibirica forests were 74.07 Mg C/hm^2 and 30.69 Tg C, respectively, in the Altay Mountains. Empirical comparisons of published equations for the same species growing in the Altay Mountains of Mongolia were also presented. The mean aboveground carbon stock density estimated for L. sibirica forests was higher in the Chinese Altay Mountains than in the Mongolian Altay Mountains(66.00 Mg C/hm^2).

关键词： Larix sibirica additive equation allometric equation nested regression method carbon storage

Phosphorus-doped Ni–Co sulfides connected by carbon nanotubes for flexible hybrid supercapacitor

在线全文

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2023年第5期17卷 491-503页

作者： shengwang Su li Sun Feng Xie Jialong Qian Yihe Zhang Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid WastesNational Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of GeosciencesBeijing 100083China

As promising electrode materials for supercapacitors,nickel-cobalt bimetallic sulfides render the advantages of abundant redox reactions and inherently high ***,in general,unsatisfactory performance of low specific capacity,low rate capability,and fast capacity loss exist in Ni–Co sulfide ***,we rationally regulate phosphorus-doped nickel–cobalt sulfides(P-NCS)to enhance the electrochemical performance by gas–solid ***,carbon nanotubes(CNTs)as conductive additives are added to improve the cycle stability and conductivity and form the composite P-NCS/C/*** to density functional theory,more electrons near the Fermi surface of P-NCS are demonstrated notionally than those of simple *** results manifest that P-NCS/C/CNT exhibits superior electrochemical performance,e.g.,high specific capacity(932.0 C·g^(-1)at 1 A·g^(-1)),remarkable rate capability(capacity retention ratio of 69.1%at 20 A·g^(-1)),and lower charge transfer *** importantly,the flexible hybrid asymmetric supercapacitor is assembled using P-NCS/C/CNT and activated carbon,which renders an energy density of 34.875 W·h∙kg^(-1)at a power density of 375 W∙kg^(-1).These results show that as-prepared P-NCS/C/CNT demonstrates incredible possibility as a battery-type electrode for high-performance supercapacitors.

关键词： cobalt nickel sulfide phosphorus-doping hybrid supercapacitor carbon nanotube density functional theory

针刺四关穴治疗轻度认知障碍多模态MRI研究进展

在线全文

学校读者我要写书评

暂无评论

磁共振成像 2024年第6期15卷 138-143页

作者：韩盛旺李晓陵王杨侯玉魏泽宜高胜兰王珑黑龙江中医药大学附属第二医院康复三科哈尔滨150001 黑龙江中医药大学研究生院哈尔滨150040 黑龙江中医药大学附属第一医院CT磁共振科哈尔滨150040 哈尔滨市中医医院妇科哈尔滨150020 黑龙江中医药大学附属第一医院针灸三科哈尔滨150040

轻度认知障碍(mild cognitive impairment,MCI)是阿尔茨海默病(Alzheimer's disease,AD)的前期阶段,主要症状是学习和记忆能力降低,日常生活却未受影响。针刺四关穴治疗MCI疗效确切,临床应用较广;通过针刺可以改善认知功能,但起效原理... 详细信息

轻度认知障碍(mild cognitive impairment,MCI)是阿尔茨海默病(Alzheimer's disease,AD)的前期阶段,主要症状是学习和记忆能力降低,日常生活却未受影响。针刺四关穴治疗MCI疗效确切,临床应用较广;通过针刺可以改善认知功能,但起效原理复杂。多模态MRI因对MCI异常脑区具有定位精准和实时观测的优势,为针刺四关穴治疗MCI脑效应研究及疗效判定提供可视化支持。本文从结构MRI(structural MRI,sMRI)、扩散张量成像(diffusion tensor imaging,DTI)、血氧水平依赖功能磁共振成像(blood oxygen level dependent functional MRI,BOLD-fMRI)、磁共振波谱(magnetic resonance spectroscopy,MRS)、动脉自旋标记(arterial spin labeling,ASL)五个方面,对针刺四关穴治疗MCI脑结构、脑功能、脑代谢、脑血流灌注的相关文献进行综述,从多个视角探讨MCI脑内变化,剖析针刺治疗的机制,为MCI的后续研究提供新思路。

关键词：阿尔茨海默病轻度认知障碍针刺四关穴磁共振成像结构磁共振成像功能磁共振成像弥散张量成像磁共振波谱动脉自旋标记

基于轻量级卷积神经网络的苹果表面缺陷检测方法

在线全文

学校读者我要写书评

暂无评论

河北工业科技 2021年第5期38卷 388-394页

作者：周雨帆李胜旺杨奎河白宇宋子盈河北科技大学信息科学与工程学院河北石家庄050018

为了解决目前农业信息领域对苹果表面缺陷检测准确率低的问题,提出一种基于轻量级卷积神经网络的苹果表面缺陷检测方法。首先采集苹果缺陷样本图片制作实验数据集用于模型训练和测试;其次在AlexNet网络结构的基础上,引入深度可分离卷积... 详细信息

为了解决目前农业信息领域对苹果表面缺陷检测准确率低的问题,提出一种基于轻量级卷积神经网络的苹果表面缺陷检测方法。首先采集苹果缺陷样本图片制作实验数据集用于模型训练和测试;其次在AlexNet网络结构的基础上,引入深度可分离卷积代替原有网络中的标准卷积运算来进行图像特征的提取;最后利用全局平均池化方法代替原有网络中的全连接层,从而将卷积层输出的多个特征图以自身为单位进行映射得到特征点。实验结果表明改进后网络对苹果缺陷识别精度达到了98.57%,较改进前提升1.55%;较改进前模型参数量减少99.3%、训练速度提高32.67%、FPS提高33.28%,改进后的轻量级卷积神经网络不仅减少了模型参数量和训练时间,而且提高了检测精度和速度。因此,新的检测方法在减少模型参数量的同时,还可保证模型的检测精度和效率,具有较强的工程实用性,可为苹果缺陷分类提供理论参考。

关键词：计算机神经网络卷积神经网络表面缺陷检测深度可分离卷积全局平均池化