检索结果-南通市图书馆

Lanthanide complexes-functionalized ordered mesoporous TiO_2:Multicolor emission(visible and near-infrared luminescence) based on visible-light sensitization

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2018年第9期36卷 939-945页

作者： Zhijuan Wang song dang Shu'na Zhao Lining Sun Research Center of Nano Science and Technology and School of Material Science and EngineeringShanghai University State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Saiences

Recently,much attention has been paid to the lanthanide luminescent materials based on the visiblelight sensitization for their potential applications in the fields of bio-imaging and optical devices.In this work,the lanthanide complexes have been covalently bonded to the ordered mesoporous titania（OMT） matrix,and the resulting titania-based hybrid ordered mesoporous materials（named as LnDBOMT,Ln = Eu,Sm,Yb,Nd） were characterized by using Fourier-transform infrared（FT-IR） spectroscopy,small-angle X-ray powder diffraction（SAXD）,N2 adsorption-desorption isotherms,transmission electron microscopy（TEM）,fluorescence spectroscopy,and thermogravimetric analysis.Generally,exciting with visible light is advantageous over UV excitation.Of importance here is that,under excitation with visible light,the LnDB-OMT all show characteristic visible（Eu3＋,Sm3＋） as well as nearinfrared（Sm3＋,Yb3＋,Nd3＋） luminescence of the corresponding Ln3＋ ions（multicolor emission covered from 500 to 1400 nm spectral region）,which is attributed to the energy transfer from the ligands to the Ln3＋ ions via an antenna effect.

关键词： Visible-light excitation Visible luminescence Near-infrared luminescence Lanthanide complexes-functionalized Ordered mesoporous titania Rare earths

在线全文

学校读者我要写书评

暂无评论

一种M-ary扩频信号扩频序列集估计方法

现代电子技术 2024年第1期47卷 51-54页

作者：解辉赵忠臣党松王丹陆军工程大学石家庄校区电子与光学工程系河北石家庄050003 陆军工程大学石家庄校区装备模拟训练中心河北石家庄050003

针对M-ary扩频信号的扩频序列集估计问题,提出一种基于序贯相关检测的扩频码集估计方法。首先,对同步信号样点进行划分,并利用所分向量间的相关特性,通过迭代操作得到码集中某一个元素的估计;然后,将对应于该元素的样点向量从接收信号... 详细信息

针对M-ary扩频信号的扩频序列集估计问题,提出一种基于序贯相关检测的扩频码集估计方法。首先,对同步信号样点进行划分,并利用所分向量间的相关特性,通过迭代操作得到码集中某一个元素的估计;然后,将对应于该元素的样点向量从接收信号向量集合中剔除,并重复上述步骤,以序贯的方式得到扩频码集的一个估计;最后,利用原始信号对该码集的各个元素进行检验,剔除码集中的虚假元素从而得到最终估计结果。该方法可以实现M-ary扩频信号的扩频序列集估计,并且不受扩频码集类型的限制,由于避免了二维搜索以及K均值聚类的迭代操作,文中方法具有比文献方法更快的计算速度。

关键词：扩频通信 M-ary扩频扩频序列集盲估计相关检测二维搜索均值聚类

Effects of neuregulin-1 on autonomic nervous system remodeling post-myocardial infarction in a rat model

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2017年第11期12卷 1905-1910页

作者： Xin Lai Liang Zhong Hai-xia Fu song dang Xin Wang Ning Zhang Gao-ke Feng Zi-qiang Liu Xi Wang Long Wang Department of Cardiology Renmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina Cardiovascular Research Institute Wuhan UniversityWuhanHubei ProvinceChina Hubei Key Laboratory of Cardiology WuhanHubei ProvinceChina Wuhan Medical&Healthcare Center for Women and Children WuhanHubei ProvinceChina Department of Cardiology Henan Province People's HospitalZhengzhouHenan ProvinceChina

Sympathetic nerve and vagus nerve remodeling play an important part in cardiac function post-myocardial infarction （MI）. Increasing evidence indicates that neuregulin-1 （NRG-1） improves cardiac function following heart failure. Since its impact on cardiac function and neural remodeling post-MI is poorly understood, we aimed to investigate the role of NRG-1 in autonomic nervous system remodeling post-MI. Forty-five Sprague-Dawley rats were equally randomized into three groups： sham （with the left anterior descending coronary artery exposed but without ligation）, MI （left anterior descending coronary artery ligation）, and MI plus NRG-1 （left anterior descending coronary artery ligation followed by intraperitoneal injection of NRG-1 （10 lag/kg, once daily for 7 days））. At 4 weeks after MI, echocardi- ography was used to detect the rat cardiac function by measuring the left ventricular end-systolic inner diameter, left ventricular diastolic diameter, left ventricular end-systolic volume, left ventricular end-diastolic volume, left ventricular ejection fraction, and left ventricular fractional shortening, mRNA and protein expression levels of tyrosine hydroxylase, growth associated protein-43 （neuronal specific pro- tein）, nerve growth factor, choline acetyltransferase （vagus nerve marker）, and vesicular acetylcholine transporter （cardiac vagal nerve fiber marker） in ischemic myocardia were detected by real-time PCR and western blot assay to assess autonomous nervous remodeling. After MI, the rat cardiac function deteriorated significantly, and it was significantly improved after NRG-1 injection. Compared with the MI group, mRNA and protein levels of tyrosine hydroxylase and growth associated protein-43, as well as choline acetyltransferase mRNA level significantly decreased in the MI plus NRG-1 group, while mRNA and protein levels of nerve growth factor and vesicular acetylcholine transporters, as well as choline acetyltransferase protein level slightly decreased. Our results indicate that NRG- 1 can improve cardiac

关键词： nerve remodeling myocardial infarction neuregulin-1 sympathetic nerve vagus nerve animal model real-time PCR westernblot assay cardiac function echocardiography

A multi-responsive luminescent sensor towards Fe_(3+) and acetone based on a Cd-containing metal–organic framework

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2016年第4期27卷 497-501页

作者： Ting Wang Qing-Hui Liu Ying Gao Xiu-Yun Yang Weiting Yang song dang Zhong-Ming Sun Changchun University of Science & Technology School of Chemistry and Environmental Engineering State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences College of Physics Jilin University

A Cd-containing metal–organic framework（Cd L）, formula as {[Cd_3（L）_2（H_2O）_6] 1.5DMF}, has been synthesized under solvothermal condition by the reaction of 4,40,400-（methylsilanetriyl）tribenzoic acid（H_3L） and Cd^（2＋）ion. Single-crystal X-ray diffraction reveals that Cd L displays a three-dimensional framework with 2-fold interpenetration and DMF molecules locate in the void space of the channels. A topological analysis of the framework indicates Cd Lisa 3,4-connected pto net. The photoluminescence properties of Cd L are systematically studied in detail. Impressively, Cd L shows excellent detection performance towards Fe^（3＋）ion and acetone in the sensing experiments, which undoubtedly demonstrates the great potential of Cd L as a highly selective multi-responsive luminescent sensor for the detection of organic solvents and metal ions.

关键词： Metal–organic framework Fluorescent probe Multi-responsive sensor Luminescent quenching

Effects of Traditional Chinese Medicine Shensong Yangxin Capsules on Heart Rhythm and Function in Congestive Heart Failure Patients with Frequent Ventricular Premature Complexes：A Randomized, Double-blind, Multicenter Clinical Trial

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2017年第14期130卷 1639-1647页

作者： Xi Wang Dan HU song dang He Huang Cong-Xin Huang Ming-Jie Yuan Yan-Hong Tang Qing-Shan Zheng Fang Yin Shu Zhang Bo-Li Zhang Run-Lin Gao Department of Cardiology Cardiovascular Research Institute Renmin Hospital of Wuhan University Wuhan University Wuhan Hubei 430060 China Department of Cardiology Cardiovascular Research Institute Renmin Hospital of Wuhan University Wuhan University Wuhan Hubei 430060 China Department of Experimental Cardiology Masonic Medical Research Laboratory Utica NY 13501 USA Center for Drug Clinical Research Shanghai University of Traditional Chinese Medicine Shanghai 201203 China National Center for Cardiovascular Disease Fuwai Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100037 China State Key Laboratory of Modern Chinese Medicine College of Traditional Chinese Medicine Tianjin University of Traditional Chinese Medicine Tianjin 300193 China

Background：Pharmacological therapy for congestive heart failure （CHF） with ventricular arrhythmia is limited.In the study,our aim was to evaluate the effects of Chinese traditional medicine Shensong Yangxin capsules （SSYX） on heart rhythm and function in CHF patients with frequent ventricular premature complexes （VPCs）.Methods：This double-blind,placebo-controlled,multicenter study randomized 465 CHF patients with frequent VPCs to the SSYX （n =232） and placebo groups （n =233） for 12 weeks of treatment.The primary endpoint was the VPCs monitored by a 24-h ambulatory electrocardiogram.The secondary endpoints included the left ventricular ejection fraction （LVEF）,left ventricular end-diastolic diameter,N-terminal pro-brain natriuretic peptide （NT-proBNP）,New York Heart Association （NYHA） classification,6-min walking distance （6MWD）,Minnesota Living with Heart Failure Questionnaire （MLHFQ） scores,and composite cardiac events （CCEs）.Results：The clinical characteristics were similar at baseline.SSYX caused a significantly greater decline in the total number of VPCs than the placebo did （-2145 ± 2848 vs.-841 ± 3411,P 〈 0.05）.The secondary endpoints of the LVEE NYHA classification,NT-proBNP,6MWD,and MLHFQ scores showed a greater improvements in the SSYX group than in the placebo group （ALVEF at 12th week：4.75 ± 7.13 vs.3.30 ± 6.53;NYHA improvement rate at the 8th and 12th week：32.6% vs.21.8%,40.5% vs.25.7%;mean level of NT-proBNP in patients with NT-proBNP 〉125 pg/ml at 12th week：-122 [Q1,Q3：-524,0] vs.-75 [Q1,Q3：-245,0];A6MWD at 12th week：35.1 ± 38.6 vs.17.2 ± 45.6;AMLHFQ at the 4th,8th,and 12th week：-4.24 ± 6.15 vs.-2.31 ± 6.96,-8.l 9 ± 8.41 vs.-3.25 ± 9.40,10.60 ± 9.41 vs.-4.83 ± 11.23,all P 〈 0.05）.CCEs were not different between the groups during the study period.Conclusions：In this 12-week pilot study,SSYX was demonstrated to have the benefits of VPCs suppression and cardiac function improvement with good compliance on a background of standard treatment for CHF.

关键词： Congestive Heart Failure Randomized ControlledTrial Shensong Yangxin Capsules Ventricular PrematureComplexes

在线全文

学校读者我要写书评

暂无评论

“雷达数据处理与终端”课程教学改革探讨

电气电子教学学报 2024年第1期46卷 28-32页

作者：解辉王寅龙马俊涛党松王丹陆军工程大学石家庄校区电子与光学工程系石家庄050003 陆军工程大学石家庄校区装备模拟训练中心石家庄050003

“雷达数据处理与终端”课程在雷达专业课程体系中具有重要地位和作用。紧密结合学员学情特点和课程教学目标,以航迹生命周期为驱动,重构知识逻辑,优化课程教学内容,从教学组织、教学方法、资源建设、课程思政等方面进行教学改革,打通... 详细信息

“雷达数据处理与终端”课程在雷达专业课程体系中具有重要地位和作用。紧密结合学员学情特点和课程教学目标,以航迹生命周期为驱动,重构知识逻辑,优化课程教学内容,从教学组织、教学方法、资源建设、课程思政等方面进行教学改革,打通学员思维回路,有效突破教学重难点,达成教学目标。同行评价和学员评教反馈信息显示,课程改革取得了较好的成效,为雷达专业课程深化推进实施“立德树人、为战育人”教学改革提供了有益参考和借鉴。

关键词：雷达工程课程设计雷达数据处理与终端教学改革

Efficient solar-driven CO_(2)-to-fuel conversion via Ni/MgAlO_(x)@SiO_(2)nanocomposites at low temperature

在线全文

学校读者我要写书评

暂无评论

Fundamental Research 2024年第1期4卷 131-139页

作者： Xianglei Liu Yueyue Ling Chen Sun Hang Shi Hangbin Zheng Chao song Ke Gao Chunzhuo dang Nan Sun Yimin Xuan Yulong Ding School of Energy and Power Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Birmingham Centre for Energy Storage School of Chemical EngineeringUniversity of BirminghamBirmingham B152TTUnited Kingdom

Solar-driven CO_(2)-to-fuel conversion assisted by another major greenhouse gas CH_(4)is promising to concurrently tackle energy shortage and global warming problems.However,current techniques still suffer from drawbacks of low efficiency,poor stability,and low selectivity.Here,a novel nanocomposite composed of interconnected Ni/MgAlOx nanoflakes grown on SiO_(2)particles with excellent spatial confinement of active sites is proposed for direct solar-driven CO_(2)-to-fuel conversion.An ultrahigh light-to-fuel efficiency up to 35.7%,high production rates of H_(2)(136.6 mmol min^(-1)g^(-1))and CO(148.2 mmol min^(-1)g^(-1)),excellent selectivity(H_(2)/CO ratio of 0.92),and good stability are reported simultaneously.These outstanding performances are attributed to strong metal-support interactions,improved CO_(2)absorption and activation,and decreased apparent activation energy under direct light illumination.MgAlO_(x)@SiO_(2)support helps to lower the activation energy of CH^(*) oxidation to CHO^(*) and improve the dissociation of CH_(4)to CH_(3)^(*) as confirmed by DFT calculations.Moreover,the lattice oxygen of MgAlO_(x) participates in the reaction and contributes to the removal of carbon deposition.This work provides promising routes for the conversion of greenhouse gasses into industrially valuable syngas with high efficiency,high selectivity,and benign sustainability.

关键词： Solar fuel CO_(2)reduction Dry reforming of methane Photothermocatalysis Stability

Combined Effect of Outdoor Time and Other Modifiable Factors on Myopia Incidence Among Children and Adolescents—9 PLADs,China,2020

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China CDC weekly 2024年第9期6卷 151-156,I0001,I0002页

作者： Panliang Zhong Yunfei Liu Ning Ma Jiajia dang Di Shi Shan Cai Ziyue Chen Yanhui Dong Peijin Hu Jun Ma Patrick W.C Lau Randall S.Stafford Yi song Institute of Child and Adolescent Health School of Public HealthPeking UniversityNational Health Commission Key Laboratory of Reproductive HealthBeijingChina Department of Sport Physical Education&HealthHong Kong Baptist UniversityKowloon TongHong Kong Special Administrative RegionChina Department of Medicine Stanford Prevention Research CenterStanford University School of MedicineStanfordCAUnited States

Summary What is already known about this topic?Myopia has been identified as a significant emerging challenge and policy priority among children and adolescents in China by the Ministry of Education and seven other departments.Limited research has been conducted to investigate the collective impact of outdoor time and other modifiable factors on the incidence of myopia.

关键词： Incidence collective policy

High-Al-composition AlGaN/GaN MISHEMT on Si with fT of 320 GHz

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2024年第6期67卷 459-460页

作者： Hanghai DU Lu HAO Zhihong LIU Zeyu song Yachao ZHANG Kui dang Jin ZHOU Jing NING Zan LI Jincheng ZHANG Yue HAO State Key Laboratory of Wide Bandgap Semiconductor Devices and Integrated Technology School of MicroelectronicsXidian University Guangzhou Wide Bandgap Semiconductor Innovation Center Guangzhou Institute of TechnologyXidian University State Key Laboratory of Integrated Services Networks School of Communication EngineeringXidian University

GaN-based metal-insulator-semiconductor high-electronmobility-transistors (MISHEMTs) have many excellent performances compared with the Si and Ga As counterparts,and are prime candidates for applications in communicat...

关键词：