期刊文献+
共找到35篇文章
< 1 2 >
每页显示 20 50 100
Stabilizing zinc anode using zeolite imidazole framework functionalized separator for durable aqueous zinc-ion batteries 被引量:1
1
作者 Weisong Zhang Xinyan Zhu +8 位作者 ling kang Ziyu Peng Jing Zhu Liang Pan Lei Dai Shude Liu ling Wang Yongguang Liu Zhangxing He 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第3期23-31,I0003,共10页
Aqueous zinc-ion batteries(AZIBs) hold great promise as a viable alternative to lithium-ion batteries owing to their high energy density and environmental friendliness.However,AZIBs are consistently plagued by the for... Aqueous zinc-ion batteries(AZIBs) hold great promise as a viable alternative to lithium-ion batteries owing to their high energy density and environmental friendliness.However,AZIBs are consistently plagued by the formation of zinc dendrites and concurrent side reactions,which significantly diminish their overall service life,In this study,the glass fiber separator(GF) is modified using zeolite imidazole salt framework-8(ZIF-8),enabling the development of efficient AZIBs.ZIF-8,which is abundant in nitrogen content,efficiently regulates the desolvation of [Zn(H_(2)O)_(6)]^(2+) to inhibit hydrogen production.Moreover,it possesses abundant nanochannels that facilitate the uniform deposition of Zn~(2+) via a localized action,thereby hindering the formation of dendrites.The insulating properties of ZIF-8 help prevent Zn^(2+) and water from trapping electron reduction at the layer surface,which reduces corrosion of the zinc anode.Consequently,ZIF-8-GF achieves the even transport of Zn^(2+) and regulates the homogeneous deposition along the Zn(002) crystal surface,thus significantly enhancing the electrochemical performance of the AZIBs,In particular,the Zn|Zn symmetric cell with the ZIF-8-GF separator delivers a stable cycle life at0.5 mA cm^(-2) of 2300 h.The Zn|ZIF-8-GF|MnO_(2) cell exhibits reduced voltage polarization while maintaining a capacity retention rate(93.4%) after 1200 cycles at 1.2 A g^(-1) The unique design of the modified diaphragm provides a new approach to realizing high-performance AZIBs. 展开更多
关键词 Aqueous zinc-ion batteries Separators modifications ZIF-8 Zn deposition Dendrite-free
下载PDF
Nondestructive technique for identifying nuclides using neutron resonance transmission analysis at CSNS Back-n
2
作者 Sheng-Da Tang Yong-Hao Chen +72 位作者 Jing-Yu Tang Rui-Rui Fan Qiang Li Gong Li Dong Liu Zheng-Yao Jin Xing-Zhu Cui Tian-Xiang Chen Yi-Wei Yang Rong Liu Han Yi Yang Li Zhen Yang Qi An Hao-Fan Bai Jiang-Bo Bai Jie Bao Ping Cao Qi-Ping Chen Zhen Chen Zeng-Qi Cui An-Chuan Fan Chang-Qing Feng Fan-Zhen Feng Ke-Qing Gao Min-Hao Gu Chang-Cai Han Zi-Jie Han Guo-Zhu He Yong-Cheng He Yang Hong Yi-Wei Hu Han-Xiong Huang Wei-Hua Jia Hao-yu Jiang Wei Jiang Zhi-jie Jiang ling kang Bo Li Chao Li Jia-Wen Li Xiao Li Jie Liu Shu-Bin Liu Guang-Yuan Luan Chang-Jun Ning Bin-Bin Qi Jie Ren Zhi-Zhou Ren Xi-Chao Ruan Zhao-Hui Song kang Sun Zhi-Xin Tan Li-Jiao Wang Peng-Cheng Wang Zhao-Hui Wang Zhong-Wei Wen Xiao-Guang Wu Xuan Wu Li-Kun Xie Yong-Ji Yu Guo-Hui Zhang Lin-Hao Zhang Mo-Han Zhang Qi-Wei Zhang Xian-Peng Zhang Yu-Liang Zhang Yue Zhang Zhi-Yong Zhang Mao-Yuan Zhao Lu-Ping Zhou Zhi-Hao Zhou Ke-Jun Zhu 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2024年第1期178-187,共10页
Nondestructive and noninvasive neutron assays are essential applications of neutron techniques.Neutron resonance transmission analysis(NRTA)is a powerful nondestructive method for investigating the elemental compositi... Nondestructive and noninvasive neutron assays are essential applications of neutron techniques.Neutron resonance transmission analysis(NRTA)is a powerful nondestructive method for investigating the elemental composition of an object.The back-streaming neutron line(Back-n)is a newly built time-of-flight facility at the China Spallation Neutron Source(CSNS)that provides neutrons in the eV to 300 MeV range.A feasibility study of the NRTA method for nuclide identification was conducted at the CSNS Back-n via two test experiments.The results demonstrate that it is feasible to identify different elements and isotopes in samples using the NRTA method at Back-n.This study reveals its potential future applications. 展开更多
关键词 CSNS White neutron beam NRTA Nuclide identification Nondestructive method
下载PDF
Study of the response of 10B-doped MCP to wide-energy range neutrons from eV to MeV
3
作者 Qiang Li Li‑Jiao Wang +76 位作者 Xiang‑Biao Qiu Jing‑Wen Li Wei Xu Tao Li Ze‑Bin Lin Chang‑Jun Ning Yong‑Hao Chen Rui‑Rui Fan kang Sun Jing‑Yu Tang Rong Zhang Han‑Tao Jing Bo Mei Qi An Hao‑Fan Bai Jiang‑Bo Bai Jie Bao Ping Cao Qi‑Ping Chen Zhen Chen Zeng‑Qi Cui An‑Chuan Fan Chang‑Qing Feng Fan‑Zhen Feng Ke‑Qing Gao Min‑Hao Gu Chang‑Cai Han Zi‑Jie Han Guo‑Zhu He Yong‑Cheng He Yang Hong Yi‑Wei Hu Han‑Xiong Huang Wei‑Hua Jia Hao‑Yu Jiang Wei Jiang Zhi‑Jie Jiang Zheng‑Yao Jin ling kang Bo Li Chao Li Gong Li Jia‑Wen Li Xiao Li Yang Li Jie Liu Rong Liu Shu‑Bin Liu Guang‑Yuan Luan Bin‑Bin Qi Jie Ren Zhi‑Zhou Ren Xi‑Chao Ruan Zhao‑Hui Song Zhi‑Xin Tan Sheng‑Da Tang Peng‑Cheng Wang Zhao‑Hui Wang Zhong‑Wei Wen Xiao‑Guang Wu Xuan Wu Li‑Kun Xie Yi‑Wei Yang Han Yi Yong‑Ji Yu Guo‑Hui Zhang Lin‑Hao Zhang Mo‑Han Zhang Qi‑Wei Zhang Xian‑Peng Zhang Yu‑Liang Zhang Yue Zhang Zhi‑Yong Zhang Mao‑Yuan Zhao Lu‑Ping Zhou Zhi‑Hao Zhou Ke‑Jun Zhu 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2024年第8期132-141,共10页
Neutron-sensitive microchannel plates(nMCPs)have applications in neutron detection,including energy spectrum measurements,neutron-induced cross sections,and neutron imaging.10B-doped MCPs(B-MCPs)have attracted signifi... Neutron-sensitive microchannel plates(nMCPs)have applications in neutron detection,including energy spectrum measurements,neutron-induced cross sections,and neutron imaging.10B-doped MCPs(B-MCPs)have attracted significant attention owing to their potential for exhibiting a high neutron detection efficiency over a large neutron energy range.Good spatial and temporal resolutions are useful for neutron energy-resolved imaging.However,their practical applications still face many technical challenges.In this study,a B-MCP with 10 mol%10B was tested for its response to wide-energy neutrons from eV to MeV at the Back-n white neutron source at the China Spallation Neutron Source.The neutron detection efficiency was calibrated at 1 eV,which is approximately 300 times that of an ordinary MCP and indicates the success of 10 B doping.The factors that caused the reduction in the detection efficiency were simulated and discussed.The neutron energy spectrum obtained using B-MCP was compared with that obtained by other measurement methods,and showed very good consistency for neutron energies below tens of keV.The response is more complicated at higher neutron energy,at which point the elastic and nonelastic reactions of all nuclides of B-MCP gradually become dominant.This is beneficial for the detection of neutrons,as it compensates for the detection efficiency of B-MCP for high-energy neutrons. 展开更多
关键词 Neutron radiation image 10B-doped MCP Neutron response Wide-energy range neutrons
下载PDF
10B-doped MCP detector developed for neutron resonance imaging at Back-n white neutron source
4
作者 Qiang Li Li‑Jiao Wang +70 位作者 Jing‑Yu Tang Xiang‑Biao Qiu Zhen Chen Mao‑Yuan Zhao Chang‑Jun Ning Kai Pan Wei Xu Tao Li Su‑Peng Lu Han Yi Rui‑Rui Fan Chang‑Qing Feng Rong Zhang Xiao‑Yang Sun Qi An Hao‑Fan Bai Jiang‑Bo Bai Jie Bao Ping Cao Qi‑Ping Chen Yong‑Hao Chen Zeng‑Qi Cui An‑Chuan Fan Fan‑Zhen Feng Min‑Hao Gu Chang‑Cai Han Zi‑Jie Han Guo‑Zhu He Yong‑Cheng He Yang Hong Yi‑Wei Hu Han‑Xiong Huang Wei Jiang Zhi‑Jie Jiang Zheng‑Yao Jin ling kang Bo Li Gong Li Xiao Li Yang Li Jie Liu Rong Liu Shu‑Bin Liu Yi‑Na Liu Guang‑Yuan Luan Jie Ren Zhi‑Zhou Ren Xi‑Chao Ruan Zhao‑Hui Song kang Sun Zhi‑Xin Tan Sheng‑Da Tang Jin‑Cheng Wang Peng‑Cheng Wang Zhao‑Hui Wang Zhong‑Wei Wen Xiao‑Guang Wu Xuan Wu Cong Xia Yong‑Ji Yu Guo‑Hui Zhang Hang‑Chang Zhang Lin‑Hao Zhang Qi‑Wei Zhang Xian‑Peng Zhang Yu‑Liang Zhang Yue Zhang Zhi‑Yong Zhang Zhi‑Hao Zhou Ke‑Jun Zhu Chong Zou 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2024年第8期58-68,共11页
Neutron resonance imaging(NRI)has recently emerged as an appealing technique for neutron radiography.Its complexity surpasses that of conventional transmission imaging,as it requires a high demand for both a neutron s... Neutron resonance imaging(NRI)has recently emerged as an appealing technique for neutron radiography.Its complexity surpasses that of conventional transmission imaging,as it requires a high demand for both a neutron source and detector.Consequently,the progression of NRI technology has been sluggish since its inception in the 1980s,particularly considering the limited studies analyzing the neutron energy range above keV.The white neutron source(Back-n)at the China Spallation Neutron Source(CSNS)provides favorable beam conditions for the development of the NRI technique over a wide neutron energy range from eV to MeV.Neutron-sensitive microchannel plates(MCP)have emerged as a cutting-edge tool in the field of neutron detection owing to their high temporal and spatial resolutions,high detection efficiency,and low noise.In this study,we report the development of a 10B-doped MCP detector,along with its associated electronics,data processing system,and NRI experiments at the Back-n.Individual heavy elements such as gold,silver,tungsten,and indium can be easily identified in the transmission images by their characteristic resonance peaks in the 1–100 eV energy range;the more difficult medium-weight elements such as iron,copper,and aluminum with resonance peaks in the 1–100 keV energy range can also be identified.In particular,results in the neutron energy range of dozens of keV(Aluminum)are reported here for the first time. 展开更多
关键词 Neutron resonance imaging 10B doped MCP detector White neutron source Sample nuclide identification
下载PDF
An Intelligent Quality Control Method for Manufacturing Processes Based on a Human–Cyber–Physical Knowledge Graph
5
作者 Shilong Wang Jinhan Yang +2 位作者 Bo Yang Dong Li ling kang 《Engineering》 SCIE EI CAS CSCD 2024年第10期242-260,共19页
Quality management is a constant and significant concern in enterprises.Effective determination of correct solutions for comprehensive problems helps avoid increased backtesting costs.This study proposes an intelligen... Quality management is a constant and significant concern in enterprises.Effective determination of correct solutions for comprehensive problems helps avoid increased backtesting costs.This study proposes an intelligent quality control method for manufacturing processes based on a human–cyber–physical(HCP)knowledge graph,which is a systematic method that encompasses the following elements:data management and classification based on HCP ternary data,HCP ontology construction,knowledge extraction for constructing an HCP knowledge graph,and comprehensive application of quality control based on HCP knowledge.The proposed method implements case retrieval,automatic analysis,and assisted decision making based on an HCP knowledge graph,enabling quality monitoring,inspection,diagnosis,and maintenance strategies for quality control.In practical applications,the proposed modular and hierarchical HCP ontology exhibits significant superiority in terms of shareability and reusability of the acquired knowledge.Moreover,the HCP knowledge graph deeply integrates the provided HCP data and effectively supports comprehensive decision making.The proposed method was implemented in cases involving an automotive production line and a gear manufacturing process,and the effectiveness of the method was verified by the application system deployed.Furthermore,the proposed method can be extended to other manufacturing process quality control tasks. 展开更多
关键词 Quality control Human-cyber-physical ternary data Knowledge graph
下载PDF
Milestone progress of the HEPS booster commissioning
6
作者 Yue-Mei Peng Jian-She Cao +20 位作者 Jin-Hui Chen Hai-Yi Dong Ping He Yi Jiao ling kang Wen kang Jian Li Jing-Yi Li Guo-Ping Lin Fang Liu Feng-Li Long Cai Meng Xin Qi Hua-Min Qu Yan-Feng Sui Sheng Wang Gang Xu Qiang Ye Jing Zhang Pei Zhang Wei-Min Pan 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2024年第1期170-177,共8页
The high-energy photon source(HEPS)is the first fourth-generation synchrotron light source facility in China.The HEPS injector consists of a linear accelerator(Linac)and a full energy booster.The booster captures the ... The high-energy photon source(HEPS)is the first fourth-generation synchrotron light source facility in China.The HEPS injector consists of a linear accelerator(Linac)and a full energy booster.The booster captures the electron beam from the Linac and increases its energy to the value required for the storage ring.The full-energy beam could be injected to the storage ring directly or after“high-energy accumulation.”On November 17,2023,the key booster parameters successfully reached their corresponding target values.These milestone results were achieved based on numerous contributions,including nearly a decade of physical design,years of equipment development and installation,and months of beam commissioning.As measured at the extraction energy of 6 GeV,the averaged beam current and emittance reached 8.57 mA with 5 bunches and 30.37 nm rad with a single-bunch charge of 5.58 nC,compared with the corresponding target values of 6.6 mA and 35 nm rad,respectively.This paper presents the physical design,equipment development,installation,and commissioning process of the HEPS booster. 展开更多
关键词 High energy photon source BOOSTER Beam commissioning
下载PDF
舌肌训练对脑卒中后吞咽困难患者舌肌及吞咽功能的影响
7
作者 凌康 吴如意 杨作球 《黑龙江医学》 2024年第11期1373-1375,共3页
目的:分析舌肌训练对脑卒中吞咽困难患者舌肌及吞咽功能的影响。方法:选取2020年2月—2022年2月在滁州市中西医结合医院康复科住院的60例脑卒中吞咽困难患者作为研究对象,随机分为实验组和对照组,每组各30例。对照组患者实施常规吞咽功... 目的:分析舌肌训练对脑卒中吞咽困难患者舌肌及吞咽功能的影响。方法:选取2020年2月—2022年2月在滁州市中西医结合医院康复科住院的60例脑卒中吞咽困难患者作为研究对象,随机分为实验组和对照组,每组各30例。对照组患者实施常规吞咽功能训练,实验组在对照组的基础上联合舌肌训练,分别评估治疗前后患者吞咽功能障碍评价标准评分及功能性经口摄食评分(FOIS)。结果:治疗后,两组患者舌肌、咀嚼肌及咽喉肌较治疗前明显提高,实验组患者舌肌得分明显高于对照组,差异有统计学意义(t=-3.168,P<0.05);治疗后,两组患者FOIS得分较治疗前明显提高,且实验组FOIS明显高于对照组,差异有统计学意义(t=-2.860,P<0.05)。结论:舌肌训练能够增强脑卒中吞咽困难患者舌肌肌力,促进其吞咽功能的恢复。 展开更多
关键词 脑卒中 吞咽困难 舌肌训练
下载PDF
Measurement of the ^(232)Th(n,f)cross section in the 1-200 MeV range at the CSNS Back-n 被引量:4
8
作者 Zhi-Zhou Ren Yi-Wei Yang +77 位作者 Yong-Hao Chen Rong Liu Bang-Jiao Ye Jie Wen Hai-Rui Guo Zi-Jie Han Qi-Ping Chen Zhong-Wei Wen Wei-Li Sun Han Yi Xing-Yan Liu Tao Ye Jiang-Bo Bai Qi An Jie Bao Yu Bao Ping Cao Hao-Lei Chen Zhen Chen Zeng-Qi Cui Rui-Rui Fan Chang-Qing Feng Ke-Qing Gao Xiao-Long Gao Min-Hao Gu Chang-Cai Han Guo-Zhu He Yong-Cheng He Yang Hong Yi-Wei Hu Han-Xiong Huang Xi-Ru Huang Hao-Yu Jiang Wei Jiang Zhi-Jie Jiang Han-Tao Jing ling kang Bo Li Chao Li Jia-Wen Li Qiang Li Xiao Li Yang Li Jie Liu Shu-Bin Liu Ze Long Guang-Yuan Luan Chang-Jun Ning Meng-Chen Niu Bin-Bin Qi Jie Ren Xi-Chao Ruan Zhao-Hui Song kang Sun Zhi-Jia Sun Zhi-Xin Tan Jing-Yu Tang Xin-Yi Tang Bin-Bin Tian Li-Jiao Wang Peng-Cheng Wang Zhao-Hui Wang Xiao-Guang Wu Xuan Wu Li-Kun Xie Xiao-Yun Yang Li Yu Tao Yu Yong-Ji Yu Guo-Hui Zhang Lin-Hao Zhang Qi-Wei Zhang Xian-Peng Zhang Yu-Liang Zhang Zhi-Yong Zhang Lu-Ping Zhou Zhi-Hao Zhou Ke-Jun Zhu 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2023年第8期142-153,共12页
The ^(232)Th(n,f)cross section is very important in basic nuclear physics and applications based on the Th/U fuel cycle.Using the time-of-flight method and a multi-cell fast-fission ionization chamber,a novel measurem... The ^(232)Th(n,f)cross section is very important in basic nuclear physics and applications based on the Th/U fuel cycle.Using the time-of-flight method and a multi-cell fast-fission ionization chamber,a novel measurement of the^(232)Th(n,f)cross sec-tion relative to^(235)U in the 1–200 MeV range was performed at the China Spallation Neutron Source Back-n white neutron source(Back-n).The fission event-neutron energy spectra of^(232)Th and^(235)U fission cells were measured in the single-bunch mode.Corrected 232Th/235U fission cross-sectional ratios were obtained,and the measurement uncertainties were 2.5–3.7%for energies in the 2–20 MeV range and 3.6–6.2%for energies in the 20–200 MeV range.The^(232)Th(n,f)cross section was obtained by introducing the standard cross section of^(235)U(n,f).The results were compared with those of previous theoreti-cal calculations,measurements,and evaluations.The measured 232Th fission cross section agreed with the main evaluation results in terms of the experimental uncertainty,and 232Th fission resonances were observed in the 1–3 MeV range.The present results provide^(232)Th(n,f)cross-sectional data for the evaluation and design of Th/U cycle nuclear systems. 展开更多
关键词 232Th(n f)cross section Fast-fission ionization chamber Back-n white neutron source
下载PDF
户籍身份转变及其方式不同的幸福效应研究
9
作者 凌亢 方宏舰 白先春 《宜宾学院学报》 2017年第11期29-39,共11页
利用CGSS2012和CGSS2013数据,采用有序选择模型分析了户籍身份转变及其转变方式的不同对幸福感的影响,采用倾向值得分匹配模型有效解决样本自选择造成的可观测异质性带来的偏差,并利用Rosenbaum边界估计方法检验是否存在可能的不可观测... 利用CGSS2012和CGSS2013数据,采用有序选择模型分析了户籍身份转变及其转变方式的不同对幸福感的影响,采用倾向值得分匹配模型有效解决样本自选择造成的可观测异质性带来的偏差,并利用Rosenbaum边界估计方法检验是否存在可能的不可观测异质性对研究结果造成偏误。结果显示:户籍身份的转变确实可以提高幸福感水平;"政策性"农转非与流动人口的幸福感并没有显著差异;区分户籍身份转变方式后发现,户籍身份转变中的正向"选择性"才是影响幸福感的根本原因;Rosenbaum边界估计方法的检验结果表明本文结果稳健,结论可信。 展开更多
关键词 户籍 “选择性”农转非 “政策性”农转非 倾向值得分匹配
下载PDF
基于ICF的国际残疾统计研究与发展及其对中国的启示 被引量:3
10
作者 孙计领 凌亢 +1 位作者 白先春 邱卓英 《中国康复理论与实践》 CSCD 北大核心 2018年第10期1127-1132,共6页
《国际功能、残疾和健康分类》(ICF)作为残疾定义和残疾测量的标准框架,已在残疾统计中取得广泛应用。本文主要从残疾统计工具和残疾调查现状两个方面梳理基于ICF的国际残疾统计进展,发现国际社会已开发出多种基于ICF的残疾测量工具,并... 《国际功能、残疾和健康分类》(ICF)作为残疾定义和残疾测量的标准框架,已在残疾统计中取得广泛应用。本文主要从残疾统计工具和残疾调查现状两个方面梳理基于ICF的国际残疾统计进展,发现国际社会已开发出多种基于ICF的残疾测量工具,并得到广泛应用,国际残疾调查和统计进展较快,残疾统计体系日趋完善。分析中国残疾统计进展和存在的主要问题,提出国际残疾统计进展对中国残疾统计的三点启示。 展开更多
关键词 国际功能、残疾和健康分类 残疾统计 人口普查
下载PDF
基于G.729的快速固定码书搜索算法 被引量:1
11
作者 周瑾 乔树山 +2 位作者 凌康 詹毅 蒋见花 《微电子学与计算机》 北大核心 2020年第11期13-16,23,共5页
共轭结构代数码激励线性预测编码算法(Conjugate-Structure Algebraic-Code Excited Linear-Prediction, CS-ACELP)的固定码书搜索算法通过嵌套循环计算出码书矢量,这个算法的重要缺陷是嵌套循环深度大,时间复杂度高,计算量大.在重排序... 共轭结构代数码激励线性预测编码算法(Conjugate-Structure Algebraic-Code Excited Linear-Prediction, CS-ACELP)的固定码书搜索算法通过嵌套循环计算出码书矢量,这个算法的重要缺陷是嵌套循环深度大,时间复杂度高,计算量大.在重排序搜索(Reordering Search Sequence)算法的基础上,对搜索结构进行改进.将预搜索部分获得的组合脉冲直接用于下一步的全搜索,将嵌套循环的深度由4层降至2层,降低时间复杂度和计算量.并且与固定码书搜索的几个经典算法相比,搜索次数减少了30%到98%不等,同时具有优于G.729A算法的优越编解码音质. 展开更多
关键词 G.729 固定码书搜索 重排序搜索算法 PESQ
下载PDF
中老年残疾人生活质量评价研究——基于CHARLS的实证分析 被引量:4
12
作者 孙计领 白先春 +1 位作者 凌亢 吴学东 《西北人口》 CSSCI 2019年第3期104-115,共12页
随着中国人口老龄化进程的加快,很大程度上,残疾人问题正在演变为老年残疾人问题。如何提高中老年人的生活质量,实现健康老龄化,已经成为全球关注的社会问题。文章基于CHARLS 2015年的数据,从主客观两大维度,构建了生活质量指标体系,测... 随着中国人口老龄化进程的加快,很大程度上,残疾人问题正在演变为老年残疾人问题。如何提高中老年人的生活质量,实现健康老龄化,已经成为全球关注的社会问题。文章基于CHARLS 2015年的数据,从主客观两大维度,构建了生活质量指标体系,测度了中老年残疾人和健全人的生活质量水平,主要发现如下:(1)中老年残疾人生活质量的评价指数为0.411,刚达到生活质量的中间水平阶段,46.46%的中老年残疾人的生活质量位于中间水平,49.49%的群体为低水平阶段,仅有4.05%的群体位于高水平阶段。(2)从生活质量的影响因素来看,中老年残疾人个体特征、子女特征、居住模式、城乡区域等因素对生活质量存在显著的影响,并且在生活质量的不同分位上存在较大的异质性。(3)不管是在平均水平上还是整体分布上,中老年残疾人的生活质量都明显低于中老年健全人,二者之间的总差异在0.1个单位左右,其中,由残疾本身造成的不合理差异约占总差异的60%左右。 展开更多
关键词 残疾人 ADL和IADL限制法 生活质量 分位数回归
下载PDF
《残疾人蓝皮书:中国残疾人事业发展报告(2019)》内容解读 被引量:2
13
作者 孙友然 凌亢 白先春 《现代特殊教育》 2020年第2期55-59,共5页
《残疾人蓝皮书:中国残疾人事业发展报告(2019)》于2019年12月出版,并于12月29日在南京特殊教育师范学院召开新闻发布会。对《残疾人蓝皮书:中国残疾人事业发展报告(2019)》的撰写背景、内容结构、核心观点、报告价值进行全面解读,有助... 《残疾人蓝皮书:中国残疾人事业发展报告(2019)》于2019年12月出版,并于12月29日在南京特殊教育师范学院召开新闻发布会。对《残疾人蓝皮书:中国残疾人事业发展报告(2019)》的撰写背景、内容结构、核心观点、报告价值进行全面解读,有助于加强人们对中国残疾人事业发展现状的了解。 展开更多
关键词 残疾人蓝皮书 残疾人事业发展报告 残疾人事业发展指数 残疾人平衡发展指数 无障碍环境建设
下载PDF
Back-n white neutron source at CSNS and its applications 被引量:20
14
作者 Jing-Yu Tang Qi An +73 位作者 Jiang-Bo Bai Jie Bao Yu Bao Ping Cao Hao-Lei Chen Qi-Ping Chen Yong-Hao Chen Zhen Chen Zeng-Qi Cui Rui-Rui Fan Chang-Qing Feng Ke-Qing Gao Xiao-Long Gao Min-Hao Gu Chang-Cai Han Zi-Jie Han Guo-Zhu He Yong-Cheng He Yang Hong Yi-Wei Hu Han-Xiong Huang Xi-Ru Huang Hao-Yu Jiang Wei Jiang Zhi-Jie Jiang Han-Tao Jing ling kang Bo Li Chao Li Jia-Wen Li Qiang Li Xiao Li Yang Li Jie Liu Rong Liu Shu-Bin Liu Xing-Yan Liu Ze Long Guang-Yuan Luan Chang-Jun Ning Meng-Chen Niu Bin-Bin Qi Jie Ren Zhi-Zhou Ren Xi-Chao Ruan Zhao-Hui Song kang Sun Zhi-Jia Sun Zhi-Xin Tan Xin-Yi Tang Bin-Bin Tian Li-Jiao Wang Peng-Cheng Wang Zhao-Hui Wang Zhong-Wei Wen Xiao-Guang Wu Xuan Wu Li-Kun Xie Xiao-Yun Yang Yi-Wei Yang Han Yi Li Yu Tao Yu Yong-Ji Yu Guo-Hui Zhang Lin-Hao Zhang Qi-Wei Zhang Xian-Peng Zhang Yu-Liang Zhang Zhi-Yong Zhang Lu-Ping Zhou Zhi-Hao Zhou Ke-Jun Zhu 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2021年第1期95-104,共10页
Back-streaming neutrons from the spallation target of the China Spallation Neutron Source(CSNS)that emit through the incoming proton channel were exploited to build a white neutron beam facility(the so-called Back-n w... Back-streaming neutrons from the spallation target of the China Spallation Neutron Source(CSNS)that emit through the incoming proton channel were exploited to build a white neutron beam facility(the so-called Back-n white neutron source),which was completed in March 2018.The Back-n neutron beam is very intense,at approximately 29107 n/cm2/s at 55 m from the target,and has a nominal proton beam with a power of 100 kW in the CSNS-I phase and a kinetic energy of 1.6 GeV and a thick tungsten target in multiple slices with modest moderation from the cooling water through the slices.In addition,the excellent energy spectrum spanning from 0.5 eV to 200 MeV,and a good time resolution related tothe time-of-flight measurements make it a typical white neutron source for nuclear data measurements;its overall performance is among that of the best white neutron sources in the world.Equipped with advanced spectrometers,detectors,and application utilities,the Back-n facility can serve wide applications,with a focus on neutron-induced cross-sectional measurements.This article presents an overview of the neutron beam characteristics,the experimental setups,and the ongoing applications at Backn. 展开更多
关键词 White neutron source Nuclear data measurements Experimental setups Neutron applications
下载PDF
Measurement of the neutron total cross section of carbon at the Back-n white neutron beam of CSNS 被引量:7
15
作者 Xing-Yan Liu Yi-Wei Yang +79 位作者 Rong Liu Jie Wen Zhong-Wei Wen Zi-Jie Han Zhi-Zhou Ren Qi An Huai-Yong Bai Jie Bao Ping Cao Qi-Ping Chen Yong-Hao Chen Pin-Jing Cheng Zeng-Qi Cui Rui-Rui Fan Chang-Qing Feng Min-Hao Gu Feng-Qin Guo Chang-Cai Han Guo-Zhu He Yong-Cheng He Yue-Feng He Han-Xiong Huang Wei-ling Huang Xi-Ru Huang Xiao-Lu Ji Xu-Yang Ji Hao-Yu Jiang Wei Jiang Han-Tao Jing ling kang Ming-Tao kang Bo Li Lun Li Qiang Li Xiao Li Yang Li Yang Li Shu-Bin Liu Guang-Yuan Luan Ying-Lin Ma Chang-Jun Ning Bin-Bin Qi Jie Ren Xi-Chao Ruan Zhao-Hui Song Hong Sun Xiao-Yang Sun Zhi-Jia Sun Zhi-Xin Tan Hong-Qing Tang Jing-Yu Tang Peng-Cheng Wang Qi Wang Tao-Feng Wang Yan-Feng Wang Zhao-Hui Wang Zheng Wang Qing-Biao Wu Xiao-Guang Wu Xuan Wu Li-Kun Xie Han Yi Li Yu Tao Yu Yong-Ji Yu Guo-Hui Zhang Jing Zhang Lin-Hao Zhang Li-Ying Zhang Qing-Min Zhang Qi-Wei Zhang Xian-Peng Zhang Yu-Liang Zhang Zhi-Yong Zhang Ying-Tan Zhao Liang Zhou Zu-Ying Zhou Dan-Yang Zhu Ke-Jun Zhu Peng Zhu 《Nuclear Science and Techniques》 SCIE CAS CSCD 2019年第9期73-82,共10页
To verify the performance of the neutron total cross-sectional spectrometer, the neutron total cross section of carbon is initially measured in the energy range of 1 eV to 20 MeV using the time-of-flight method. The m... To verify the performance of the neutron total cross-sectional spectrometer, the neutron total cross section of carbon is initially measured in the energy range of 1 eV to 20 MeV using the time-of-flight method. The measurement is performed at the Back-n white neutron source with a 76-m time-of-flight path using the China Spallation Neutron Source. A multilayer fast fission chamber with 235U and 238U is employed as the neutron detector. The diameter and thickness of the natural graphite sample are 70 mm and 40 mm, respectively. Signal waveforms are collected using a data acquisition system. Off-line data processing was used to obtain the neutron time-of-flight spectra and transmissions. The uncertainty of the counting statistics is generally approximately 3% for each bin in the energy range of 1–20 MeV. It is determined that the results for the neutron total cross section of carbon obtained using ^235U cells are in good agreement with the results obtained using 238U cells within limits of statistical uncertainty. Moreover, the measured total cross sections show good agreement with the broadening evaluated data. 展开更多
关键词 CSNS Back-n WHITE NEUTRON source NTOX NEUTRON total cross section CARBON Multilayer fast FISSION chamber
下载PDF
甲状腺特异性抗体联合抗米勒管激素对促甲状腺激素正常的多囊卵巢综合征不孕患者妊娠结局的预测价值 被引量:11
16
作者 何涓 康灵 +1 位作者 唐健 李升华 《中国现代医学杂志》 CAS 北大核心 2022年第21期69-74,共6页
目的探讨甲状腺特异性抗体联合抗米勒管激素(AMH)对促甲状腺激素(TSH)正常的多囊卵巢综合征(PCOS)不孕患者妊娠结局的预测价值。方法选取2020年9月—2021年9月上海儿童医学中心三亚市妇女儿童医院收治的TSH正常的PCOS不孕患者72例为研... 目的探讨甲状腺特异性抗体联合抗米勒管激素(AMH)对促甲状腺激素(TSH)正常的多囊卵巢综合征(PCOS)不孕患者妊娠结局的预测价值。方法选取2020年9月—2021年9月上海儿童医学中心三亚市妇女儿童医院收治的TSH正常的PCOS不孕患者72例为研究对象,根据是否妊娠分为妊娠组21例和未妊娠组51例。比较两组的一般资料及甲状腺特异性抗体 [甲状腺过氧化物酶抗体(TPOAb)、甲状腺球蛋白抗体(TGAb)及AMH水平];采用多因素Logistic回归分析妊娠结局的影响因素;绘制ROC曲线分析甲状腺特异性抗体联合AMH对妊娠结局的预测效能。结果两组的年龄、BMI、PCOS病程、不孕年限、家族史、TSH水平、性激素水平比较,差异无统计学意义(P>0.05);妊娠组PCOS病情程度等级分布优于未妊娠组(P<0.05);妊娠组TPOAb、TGAb、AMH水平低于未妊娠组(P<0.05)。经多因素Logistic回归分析,PCOS病情程度[OR=3.422(95%CI:1.287,9.098)]、TPOAb[OR=3.932(95%CI:1.765,8.758)]、TGAb[OR=3.884(95%CI:1.903,7.926)]、AMH[OR=5.695(95%CI:2.879,11.265)]均为妊娠结局的影响因素(P<0.05)。经ROC分析显示,TPOAb、TGAb、AMH预测妊娠结局的截断值分别为77.89 IU/mL、17.38 IU/L、5.90 ng/mL,敏感性分别为80.95%(95%CI:0.574,0.937)、76.19%(95%CI:0.525,0.909)、52.38%(95%CI:0.303,0.736),特异性分别为72.55%(95%CI:0.580,0.837)、78.43%(95%CI:0.643,0.882)、98.04%(95%CI:0.882,0.999),AUC分别为0.823(95%CI:0.715,0.903)、0.824(95%CI:0.717,0.904)、0.753(95%CI:0.637,0.847);联合预测的敏感性为95.24%(95%CI:0.741,0.998)、特异性为94.12%(95%CI:0.828,0.985),AUC为0.955(95%CI:0.879,0.990)。结论甲状腺特异性抗体、AMH水平对TSH正常PCOS不孕患者妊娠结局具有一定预测价值,可为临床诊治提供重要参考。 展开更多
关键词 多囊卵巢综合征 不孕 甲状腺特异性抗体 促甲状腺激素 抗米勒管激素 妊娠结局 预测价值
下载PDF
西北典型内陆流域地下水与湿地生态系统协同演化机制 被引量:7
17
作者 胡顺 凌抗 +4 位作者 王俊友 乔树锋 葛孟琰 孙自永 马瑞 《水文地质工程地质》 CAS CSCD 北大核心 2022年第5期22-31,共10页
以生态输水为代表的湿地修复工程在西北内陆流域得到了广泛应用,生态输水情形下地下水与湿地植被的交互作用决定着湿地生态系统的演化过程。以西北典型内陆流域—石羊河流域青土湖湿地为研究区,基于地下水-湿地生态系统多要素一体化动... 以生态输水为代表的湿地修复工程在西北内陆流域得到了广泛应用,生态输水情形下地下水与湿地植被的交互作用决定着湿地生态系统的演化过程。以西北典型内陆流域—石羊河流域青土湖湿地为研究区,基于地下水-湿地生态系统多要素一体化动态监测网络,结合稳定同位素和卫星遥感技术手段,分析生态输水情形下的地下水动态变化与湿地植被恢复情况,从水文地质角度揭示地下水与湿地生态系统的协同演化机制。结果显示:夏季末和秋季生态输水时,湖水补给地下水且土壤含水率增大,最大土壤含水率可达0.45 m^(3)/m^(3);冬季湿地湖面和表层土壤冻结,湖水对地下水补给量减少,春季冻土和湖面消融导致地下水略有回升,同时增大土壤含水率;夏季在下次生态输水前湖面面积最小(湖面面积最小约为1 km2,地下水水位最大埋深为3.6 m),部分区域地下水补给湖水,此时表层土壤含水率也最低(最小土壤含水率为0.01 m^(3)/m^(3));夏季末和秋季生态输水通过将生态水储存在地下水和土壤中进而作用于次年的植被恢复与生长,增大生态输水所形成的湖面面积有助于增加湿地植被覆盖度(相关系数均值为0.655);湿地地表水-土壤-地下水相互作用所形成的土壤水环境是影响湿地植被类型、根系分布和水分利用策略的主要原因,其中地下水埋深是关键性因素,地下水埋深增大导致植被类型增多、根系分布深度加大、倾向于利用深层土壤水。研究成果可为西北内陆流域湿地生态系统恢复和水资源高效利用提供科学依据。 展开更多
关键词 西北内陆流域 生态输水 地下水 湿地 植被恢复
下载PDF
Effects of tension on vortex-induced vibration(ⅥⅤ) responses of a long tensioned cylinder in uniform flows 被引量:2
18
作者 ling kang Fei Ge +1 位作者 Xiaodong Wu Youshi Hong 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2017年第1期1-9,共9页
The effects of tension on vortex-induced vibration (VIV) responses for a tension-dominated long cylinder with an aspect ratio of 550 in uniform flows are experimentally investigated in this paper. The results show tha... The effects of tension on vortex-induced vibration (VIV) responses for a tension-dominated long cylinder with an aspect ratio of 550 in uniform flows are experimentally investigated in this paper. The results show that elevated tension suppresses fluctuations of maximum displacement with respect to flow velocity and makes chaotic VIV more likely to appear. With respect to periodic VIV, if elevated tension is applied, the dominant vibration frequency in the in-line (IL) direction will switch from a fundamental vibration frequency to twice the value of the fundamental vibration frequency, which results in a ratio of the dominant vibration frequency in the IL direction to that in the cross-flow direction of 2.0. The suppression of the elevated tension in the fluctuation of the maximum displacement causes the axial tension to become an active control parameter for the VIV maximum displacement of a tension-dominated long riser or tether of an engineering structure in deep oceans. However, the axial tension must be optimized before being used since the high dominant vibration frequency due to the elevated tension may unfavorably affect the fatigue life of the riser or tether. 展开更多
关键词 Tension effect Maximum displacement Dominant vibration frequency CHAOS
下载PDF
Design of the upstream decay pipe window of the long baseline neutrino facility 被引量:1
19
作者 Hai-Jing Wang Ye Yuan +5 位作者 Jing-Yu Tang Quan Ji ling kang Chang-Jun Ning Ji-Lei Sun Shao-Hong Wei 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2021年第11期134-145,共12页
The beam windows of high-energy beam lines are important,and it is sometimes difficult to design because it is necessary to ensure particle propagation with minimum disturbance and fulfill mechanical requirements at t... The beam windows of high-energy beam lines are important,and it is sometimes difficult to design because it is necessary to ensure particle propagation with minimum disturbance and fulfill mechanical requirements at the same time.The upstream decay pipe window of the long baseline neutrino facility at Fermilab has an extremely large diameter(1.8 m),with a thickness of only 1.5 mm to separate the helium atmosphere in the decay pipe and the nitrogen atmosphere on the other side.Furthermore,the center of this dish-shaped window is expected to be a200-mm-diameter beryllium dish welded to the outside aluminum alloy A6061,and this welded combination must withstand extreme conditions of a 2.4-MW,high-energy proton beam without leakage.These severe conditions make the design of this window an unprecedented challenge.This paper describes the static thermal-structural analyses based on which the structure has been optimized,as well as dynamic analyses for understanding the shockwave effects originating in the beam.After optimization,the maximum von Mises stresses in the window decreased significantly in both normal operation and accident cases,making our design very reasonable. 展开更多
关键词 Decay pipe window Structure optimization Dynamic analyses Long baseline neutrino facility
下载PDF
绿色施工技术在房建施工中的运用研究 被引量:2
20
作者 凌康 王泽民 刘竞 《工程建设与设计》 2022年第19期219-221,共3页
为明确绿色施工技术在房屋建筑施工过程中的实际运用,提升房建施工的技术水平,保障整体建筑的环保性,论文结合房建施工过程中常见的污染问题以及相应的资源浪费情况,从环境保护、资源节约以及先进施工技术3个方面分析了绿色施工技术的... 为明确绿色施工技术在房屋建筑施工过程中的实际运用,提升房建施工的技术水平,保障整体建筑的环保性,论文结合房建施工过程中常见的污染问题以及相应的资源浪费情况,从环境保护、资源节约以及先进施工技术3个方面分析了绿色施工技术的实际应用措施。 展开更多
关键词 绿色施工 房建 施工技术
下载PDF
上一页 1 2 下一页 到第
使用帮助 返回顶部