检索结果-南通市图书馆

A bio-inspired optical imaging method for robotic perception in turbid water

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Technological Sciences 2025年第1期 79-81页

作者： Xudong SUN Yafeng li Peng liN Xiaodi SHANG Xianping fu School of Information Science and Technology Dalian Maritime University College of Computer Science and Technology Qingdao University

In the realm of underwater robotics, optical imaging plays a pivotal role in many scientific researches. Due to the effects of absorption and scattering,images captured in turbid water are severely degraded. Therefore, enhancing the quality of underwater optical images stands paramount in ensuring the continued advancement and efficacy of underwater robots across its multifarious applications.

关键词：

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

单颗粒生物质型煤燃烧影响因素研究

洁净煤技术 2007年第6期13卷 59-61页

作者：浮爱青浮绍礼谌伦建黄光许重庆地质矿产研究院重庆400042 焦作煤业(集团)有限责任公司河南焦作454000 河南理工大学材料学院河南焦作454003

通过自行设计的实验台研究了生物质型煤的燃烧特性,实验结果表明:单颗粒生物质型煤的燃烧过程可以明显的分为挥发分燃烧和固定碳燃烧2个阶段。炉膛温度和成型压力对生物质型煤的燃烧特性均有影响,炉膛温度越高,生物质型煤燃烧失重率越... 详细信息

通过自行设计的实验台研究了生物质型煤的燃烧特性,实验结果表明:单颗粒生物质型煤的燃烧过程可以明显的分为挥发分燃烧和固定碳燃烧2个阶段。炉膛温度和成型压力对生物质型煤的燃烧特性均有影响,炉膛温度越高,生物质型煤燃烧失重率越大。在实验成型压力范围内,成型压力对生物质型煤燃烧速度没有明显影响。

关键词：粘结剂燃烧特性单颗粒生物质型煤

Molecular Structure Tailoring of Organic Spacers for High‑Performance Ruddlesden–Popper Perovskite Solar Cells

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 314-357页

作者： Pengyun liu Xuejin li Tonghui Cai Wei Xing Naitao Yang Hamidreza Arandiyan Zongping shao shaobin Wang shaomin liu School of Materials Science and Engineering State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum(East China)Qingdao 266580People’s Republic of China School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 255049People’s Republic of China Centre for Applied Materials and Industrial Chemistry(CAMIC) School of ScienceRMIT UniversityMelbourneVic 3000Australia WA School of Mines:Minerals Energy and Chemical Engineering(WASM‑MECE)Curtin UniversityPerthWA 6102Australia School of Chemical Engineering The University of AdelaideAdelaideSA 5005Australia School of Engineering Great Bay UniversityDongguan 523000People’s Republic of China

Layer-structured Ruddlesden–Popper(RP)perovskites(RPPs)with decent stability have captured the imagination of the photovoltaic research community and bring hope for boosting the development of perovskite solar cell(PSC)***,two-dimensional(2D)or quasi-2D RP PSCs are encountered with some challenges of the large exciton binding energy,blocked charge transport and poor film quality,which restrict their photovoltaic ***,these issues can be readily resolved by rationally designing spacer cations of *** review mainly focuses on how to design the molecular structures of organic spacers and aims to endow RPPs with outstanding photovoltaic *** firstly elucidated the important roles of organic spacers in impacting crystallization kinetics,charge transporting ability and stability of *** we brought three aspects to attention for designing organic ***,we presented the specific molecular structure design strategies for organic spacers of RPPs aiming to improve photovoltaic performance of RP *** proposed strategies in this review will provide new avenues to develop novel organic spacers for RPPs and advance the development of RPP photovoltaic technology for future applications.

关键词： Ruddlesden-Popper perovskites Low-dimensional perovskite solar cells Organic spacers Molecular structure Design strategies

Decreased levels of phosphorylated synuclein in plasma are correlated with poststroke cognitive impairment

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第9期20卷 2598-2610页

作者： Yi Wang Yuning li Yakun Gu Wei Ma Yuying Guan Mengyuan Guo Qianqian shao Xunming Ji Jia liu Department of Clinical Laboratory Beijing Bo’ai HospitalChina Rehabilitation Research CenterCapital Medical UniversityBeijingChina Beijing Institute of Brain Disorders Laboratory of Brain DisordersMinistry of Science and TechnologyCollaborative Innovation Center for Brain DisordersBeijing Advanced Innovation Center for Big Data-based Precision MedicineCapital Medical UniversityBeijingChina Department of Neurosurgery Xuanwu HospitalCapital Medical UniversityBeijingChina

Poststro ke cognitive impairment is a major secondary effect of ischemic stroke in many patients;however,few options are available for the early diagnosis and treatment of this *** aims of this study were to(1)determine the specific relationship between hypoxic andα-synuclein during the occur of poststroke cognitive impairment and(2)assess whether the serum phosphorylatedα-synuclein level can be used as a biomarker for poststro ke cognitive *** found that the phosphorylatedα-synuclein level was significantly increased and showed pathological aggregation around the cerebral infa rct area in a mouse model of ischemic *** addition,neuronalα-synuclein phosphorylation and aggregation were observed in the brain tissue of mice subjected to chronic hypoxia,suggesting that hypoxia is the underlying cause ofα-synuclein-mediated pathology in the brains of mice with ischemic *** phosphorylatedα-synuclein levels in patients with ischemic stroke were significantly lower than those in healt hy subjects,and were positively correlated with cognition levels in patients with ischemic ***,a decrease in serum high-density lipoprotein levels in stroke patie nts was significantly correlated with a decrease in phosphorylatedα-synuclein *** ischemic stroke mice did not show significant cognitive impairment or disrupted lipid metabolism 14 days after injury,some of them exhibited decreased cognitive function and reduced phosphorylatedα-synuclein *** together,our results suggest that serum phosphorylatedα-synuclein is a potential biomarker for poststroke cognitive impairment.

关键词： biomarker high-density lipoprotein ischemic stroke phosphorylatedα-synuclein poststroke cognitive impairment

基于小波分析的2016年12月8日呼图壁M_S6.2地震地下流体异常提取

在线全文

学校读者我要写书评

暂无评论

内陆地震 2017年第3期31卷 276-283页

作者：杨绍富李姗姗新疆维吾尔自治区地震局库尔勒地震台新疆库尔勒841000

利用小波方法,梳理2016年12月8日呼图壁M_S6.2地震前新疆地下流体资料,发现震前水位、水温、逸出气体等均出现异常变化。分析了异常的时间分布、空间展布和异常成因。结果表明,地下流体的中期异常不是源兆,而是与区域构造活动密切相关。

关键词：小波分析地下流体呼图壁MS6.2地震异常提取

高三尖杉酯碱的合成及其差向异构体的分离鉴定

在线全文

学校读者我要写书评

暂无评论

化学学报 1985年第2期43卷 161-167页

作者：王永铿李裕林潘鑫复李绍白黄文魁兰州大学有机化学研究所福建中医研究所

1-溴-4-氧戊烷的乙二醇缩酮(1)的格氏试剂,与草酸二乙酯反应,得2,6-二氧-6-乙二醇缩酮庚酸乙酯(2).2经相应的钠盐3、酰氯4再转化成α-酮酰基三尖杉碱(5).5经Reformatsky反应,酸性水解后与碘甲烷的格氏试剂反应.所得产品经pH梯度萃取并... 详细信息

1-溴-4-氧戊烷的乙二醇缩酮(1)的格氏试剂,与草酸二乙酯反应,得2,6-二氧-6-乙二醇缩酮庚酸乙酯(2).2经相应的钠盐3、酰氯4再转化成α-酮酰基三尖杉碱(5).5经Reformatsky反应,酸性水解后与碘甲烷的格氏试剂反应.所得产品经pH梯度萃取并结合氧化铝干柱层析纯化,得到高三尖杉酯碱及其差向异构体的混合物8.然后制成苦味酸盐,经分级结晶,再分别转化成游离碱8a及8b.8a的HNMR,MS,IR(film).和TLC与天然高三尖杉酯碱完全一致.8b的MS和IR与8a极为相似,但它们的HNMR却有明显差异,因此可以确定它们互为差向异构体.

关键词：差向异构体缩酮庚酸反应三尖杉碱植物抗癌药苦味酸盐

Catalyst–Support Interaction in Polyaniline‑Supported Ni_(3)Fe Oxide to Boost Oxygen Evolution Activities for Rechargeable Zn‑Air Batteries

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第1期17卷 176-190页

作者： Xiaohong Zou Qian Lu Mingcong Tang Jie Wu Kouer Zhang Wenzhi li Yunxia Hu Xiaomin Xu Xiao Zhang Zongping shao liang An Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SARPeople’s Republic of China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and TechnologyNanjing University of Information Science and TechnologyNanjing 210044People’s Republic of China Department of Chemistry The Chinese University of Hong KongMa Lin BuildingShatinHong Kong SAR 999077People’s Republic of China WA School of Mines:Minerals Energy and Chemical Engineering(WASM‑MECE)Curtin UniversityPerthWA 6102Australia Research Institute for Advanced Manufacturing The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SARPeople’s Republic of China Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SARPeople’s Republic of China

Catalyst–support interaction plays a crucial role in improving the catalytic activity of oxygen evolution reaction(OER).Here we modulate the catalyst–support interaction in polyaniline-supported Ni_(3)Fe oxide(Ni_(3)Fe oxide/PANI)with a robust hetero-interface,which significantly improves oxygen evolution activities with an overpotential of 270 mV at 10 mA cm^(-2)and specific activity of 2.08 mA cm_(ECSA)^(-2)at overpotential of 300 mV,3.84-fold that of Ni_(3)Fe *** is revealed that the catalyst–support interaction between Ni_(3)Fe oxide and PANI support enhances the Ni–O covalency via the interfacial Ni–N bond,thus promoting the charge and mass transfer on Ni_(3)Fe *** the excellent activity and stability,rechargeable Zn-air batteries with optimum Ni_(3)Fe oxide/PANI are assembled,delivering a low charge voltage of 1.95 V to cycle for 400 h at 10 mA cm^(-2).The regulation of the effect of catalyst–support interaction on catalytic activity provides new possibilities for the future design of highly efficient OER catalysts.

关键词： Catalyst-support interaction Supported catalysts Heterointerface Oxygen evolution reaction Zn-air batteries

在线全文

学校读者我要写书评

暂无评论

定时输精技术在舍饲肉牛的应用试验

中国牛业科学 2017年第3期43卷 27-28页

作者：徐少付李华龙黄培美李应富双柏县爱尼山畜牧兽医站 675106 双柏县独田畜牧兽医站 675108

【目的】为了探索定时输精技术在舍饲肉牛繁殖上的应用效果,探索建立一套符合云南楚雄地区舍饲肉牛养殖场使用的定时输精程序。【方法】本试验采用ovsynch程序对于2个肉牛养殖场的21头经产健康母牛进行定时输精试验,并设对照组。经统计... 详细信息

【目的】为了探索定时输精技术在舍饲肉牛繁殖上的应用效果,探索建立一套符合云南楚雄地区舍饲肉牛养殖场使用的定时输精程序。【方法】本试验采用ovsynch程序对于2个肉牛养殖场的21头经产健康母牛进行定时输精试验,并设对照组。经统计分析:试验组母牛第一情期受胎率71.4%,对照组母牛第一情期受胎率64.5%。【结论】试验组母牛的第一情期受胎率较对照组母牛的第一情期受胎率数据经卡方(x2)分析,差异显著。该技术可以在楚雄地区舍饲肉牛养殖场推广运用。

关键词：定时输精受胎率 ovsynch

在线全文

学校读者我要写书评

暂无评论

基于突出热动力学的瓦斯膨胀能计算方法研究

河南理工大学学报（自然科学版） 2008年第1期27卷 1-5页

作者：刘彦伟浮绍礼浮爱青河南理工大学河南焦作454003 焦煤集团古汉山矿河南焦作454003 重庆地质矿产研究院重庆市400037

瓦斯膨胀能是煤与瓦斯突出的主要能量之一.采用实验室试验、数值模拟和理论分析相结合的方法研究了煤与瓦斯突出过程中煤体温度的变化规律,在此基础上提出了对突出做功的瓦斯膨胀能的计算方法.研究结果表明,煤与瓦斯突出不是大多数学者... 详细信息

瓦斯膨胀能是煤与瓦斯突出的主要能量之一.采用实验室试验、数值模拟和理论分析相结合的方法研究了煤与瓦斯突出过程中煤体温度的变化规律,在此基础上提出了对突出做功的瓦斯膨胀能的计算方法.研究结果表明,煤与瓦斯突出不是大多数学者认为的绝热过程,而是一个偏向于等温过程的多变过程.多变指数可以通过实验测定的煤体温度来计算,吸附瓦斯和游离瓦斯的膨胀功可以利用多变指数计算.

关键词：煤与瓦斯突出热动力学瓦斯膨胀能多变过程