检索结果-南通市图书馆

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

C波段介质谐振器稳频振荡源

现代雷达 1999年第4期21卷 86-89页

作者：刘松德南京电子技术研究所南京210013

详细介绍了Ｃ波段介质谐振器稳频振荡源的工作原理、电路分析、设计和调试，并给出了测试结果及使用情况。

关键词：介质谐振器振荡源频率稳定度

在线全文

学校读者我要写书评

暂无评论

基于双域神经网络的稀疏视角光声图像重建

中国激光 2022年第5期49卷 167-179页

作者：沈康刘松德施钧辉田超中国科学技术大学工程科学学院安徽合肥230026 精密科学仪器安徽普通高校重点实验室安徽合肥230026 之江实验室浙江杭州311121

光声计算断层成像(PACT)是近年来迅速发展的一种无损生物医学成像技术,在生物医学领域有着较高的应用价值。为了获得高质量的光声图像,成像系统的信号采集装置需要配备高密度的阵列探测器。但在实际应用中,由于经济成本、制造工艺及成... 详细信息

光声计算断层成像(PACT)是近年来迅速发展的一种无损生物医学成像技术,在生物医学领域有着较高的应用价值。为了获得高质量的光声图像,成像系统的信号采集装置需要配备高密度的阵列探测器。但在实际应用中,由于经济成本、制造工艺及成像时间等因素的限制,探测器的排布往往较为稀疏,难以实现稳定重建,导致重建图像中出现条纹伪影。为了解决这一问题,本文提出一种基于双域神经网络的PACT图像重建算法。该算法主要包含三个模块:数据域网络、反投影层和图像域网络,其中数据域网络和图像域网络可分别对光声数据和光声图像进行增强,以提升图像质量。为了对网络进行训练和测试,构建了一个血管仿真数据集和一个小鼠活体试验数据集。研究结果表明,所提算法可以有效地抑制条纹伪影,提升图像质量,并且重建性能优于其他重建算法。

关键词：生物光学光声成像图像重建神经网络稀疏视角

基于改进的U-Net神经网络的稀疏视角光声图像质量增强方法

在线全文

学校读者我要写书评

暂无评论

激光与光电子学进展 2022年第6期59卷 294-303页

作者：王通董文德沈康刘松德刘文田超中国科学技术大学物理学院安徽合肥230026 南京航空航天大学自动化学院江苏南京211106 中国科学技术大学工程学院安徽合肥230026 精密科学仪器安徽普通高校重点实验室安徽合肥230026

在光声断层成像中,通常利用超声换能器阵列接收光声信号,其制造成本较高,并且阵元数量对最终成像质量有重要影响。为了提升稀疏视角下光声重建的图像质量,提出了一种基于改进的U-Net神经网络结构的稀疏视角光声图像质量增强方法,该方法... 详细信息

在光声断层成像中,通常利用超声换能器阵列接收光声信号,其制造成本较高,并且阵元数量对最终成像质量有重要影响。为了提升稀疏视角下光声重建的图像质量,提出了一种基于改进的U-Net神经网络结构的稀疏视角光声图像质量增强方法,该方法采用的改进的U-Net网络的特点在于通过添加连续卷积层替换跳接层,提升编码器和解码器拼接特征的匹配度;同时利用了基于多尺度结构相似性指数的损失函数对网络进行训练。基于仿体数据集和活体数据集的实验结果表明,改进的U-Net网络具有很好的图像细节重建能力,其所得的重建图像质量优于经典的U-Net网络。

关键词：医用光学与生物光学光声断层成像图像重建稀疏视角深度学习 U-Net

浅谈水利工程索赔处理中监理工作的难点及对策

在线全文

学校读者我要写书评

暂无评论

建设监理 2007年第6期 49-50,54页

作者：刘松德刘勇陈强巴州水利水电勘测设计院新疆库尔勒841000 巴州水利管理处新疆维库尔勒841000

在水利工程建设项目中,索赔工作是客观存在的。监理工程师是解决索赔事件的核心人物。本文指出了监理工程师在水利工程索赔中的地位,分析了监理工程师处理索赔难点的原因和提高监理工程师处理工程索赔水平的对策。

关键词：监理工程师索赔对策水利工程

Image reconstruction from photoacoustic projections

在线全文

学校读者我要写书评

暂无评论

Photonics Insights 2024年第3期3卷 145-209页

作者： Chao Tian Kang Shen Wende Dong Fei Gao Kun Wang Jiao Li songde liu Ting Feng Chengbo liu Changhui Li Meng Yang Sheng Wang Jie Tian Institute of Artificial Intelligence Hefei Comprehensive National Science CenterHefeiChina School of Engineering Science University of Science and Technology of ChinaHefeiChina Department of Anesthesiology the First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiChina Anhui Province Key Laboratory of Biomedical Imaging and Intelligent Processing HefeiChina College of Automation Engineering Nanjing University of Aeronautics and AstronauticsNanjingChina School of Information Science and Technology ShanghaiTech UniversityShanghaiChina Shanghai Clinical Research and Trial Center ShanghaiChina CAS Key Laboratory of Molecular Imaging Institute of AutomationChinese Academy of SciencesBeijingChina School of Precision Instruments and Optoelectronics Engineering Tianjin UniversityTianjinChina Academy for Engineering and Technology Fudan UniversityShanghaiChina Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhenChina Department of Biomedical Engineering College of Future TechnologyPeking UniversityBeijingChina National Biomedical Imaging Center Peking UniversityBeijingChina Departments of Ultrasound State Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina School of Engineering Medicine Beihang UniversityBeijingChina Key Laboratory of Big Data-Based Precision Medicine Beihang UniversityMinistry of Industry and Information TechnologyBeijingChina

Photoacoustic computed tomography(PACT)is a rapidly developing biomedical imaging modality and has attracted substantial attention in recent *** reconstruction from photoacoustic projections plays a critical role in image formation in *** we review six major classes of image reconstruction approaches developed in the past three decades,including delay and sum,filtered back projection,series expansion,time reversal,iterative reconstruction,and deep-learning-based *** principal ideas and implementations of the algorithms are summarized,and their reconstruction performances under different imaging scenarios are *** challenges,future directions,and perspectives for the development of image reconstruction algorithms in PACT are also *** review provides a self-contained reference guide for beginners and specialists in the photoacoustic community,to facilitate the development and application of novel photoacoustic image reconstruction algorithms.

关键词： optical imaging photoacoustic tomography image reconstruction deep learning

Syntheses, structures and magnetic properties of Fe6 and Fe12 ferric wheels

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 Chemistry 2015年第12期58卷 1853-1857页

作者： Guojian Ren Yanqing liu Zhenxin Zhao Suijun liu songde Han Jian Xu Xianhe Bu Department of Chemistry Tianjin Key Lab of Metal- and Molecule-Based Material Chemistry and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Nankai University

Starting from the same Fe3O(RCO2)6 complex and using a similar synthesis strategy, the Fe6 and Fe12 wheels were obtained by utilizing two designed ligands, 2-amino-2-methyl-1,3-propanediol(L1) and 1,3-propanediol(L2), respectively. A biological buffer reagent, Bis-Tris(2-[bis-(2-hydroxyethyl)amino]-2-(hydroxymethyl)propane-1,3-diol) was first introduced in the synthesis of the Fe12 wheel, playing a vital role in adjusting the acidity of reaction environment. Magnetic studies on both Fe6 and Fe12 wheels revealed strong antiferromagnetic coupling between the spins on FeIII ions.

关键词： ferric wheel syntheses Bis-Tris magnetic properties

Three new Cu(Ⅱ)-Ln(Ⅲ) heterometallic coordination polymers constructed from quinolinic acid and nicotinic acid: Synthesis, structures, and magnetic properties

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 Chemistry 2012年第6期55卷 1064-1072页

作者： liu SuiJun SONG WeiChao XUE Li HAN songde ZENG YongFei WANG LiFu BU XianHe Department of Chemistry Tianjin Key Laboratory of Metal & Molecule-based Material Chemistry Nankai University Tianjin 300071 China

Three new Cu（Ⅱ）-Ln（Ⅲ） heterometallic coordination polymers based on two N-heterocyclic carboxylic ligands, {[LnCu（LI）2（L2）（H2O）2]· mH20},, （Ln = La（1）, Nd（2）, Gd（3）, m = 2 （for 1）, 1 （for 2, 3）, H2L1 = quinolinic acid, HE2 = nico- tinic acid）, have been synthesized and characterized. 1 has a two-dimensional （2D） layer structure with a Schlifli symbol of （44.62）, while complexes 2 and 3 are isostructural and have three-dimensional （3D） structures with a Schlafli symbol of （3.4.5）2（32.***.52.6]4.***.83.9）（32.63.7） of 3-nodal net. Magnetic investigations suggest that antiferromagnetic coupling exists be- tween NdIn and Cun in 2, while weak ferromagnetic coupling between GdⅢ and CuⅡ in 3. The difference of magnetic properties between 2 and 3 has been discussed.

关键词： Cu(Ⅱ)-Ln(Ⅲ) coordination polymers metal oxides magnetic properties

Three new Cu(Ⅱ)-Ln(Ⅲ) heterometallic coordination polymers constructed from quinolinic acid and nicotinic acid: Synthesis, structures, and magnetic properties

在线全文

学校读者我要写书评

暂无评论

中国科学:化学 2012年第6期42卷 933-934页

Three new Cu(II)-Ln(Ⅲ) heterometallic coordination polymers based on two N-heterocyclic carboxylic ligands, {[LnCu(L1)2(L2)(H2O)2]·mH2O}n (Ln = La(1), Nd(2), Gd(3), m = 2 (for 1), 1 (for 2, 3), H2L1 = quinolinic acid, HL2 = nicotinic acid), have been synthesized and characterized. 1 has a two-dimensional (2D) layer structure with a Schl?fli symbol of (44.62), while complexes 2 and 3 are isostructural and have three-dimensional (3D) structures with a Schl?fli symbol of (3.4.5)2(32.***.52.614.***.83.9)(32.63.7) of 3-nodal net. Magnetic investigations suggest that antiferromagnetic coupling exists between NdⅢ and CuII in 2, while weak ferromagnetic coupling between GdⅢ and CuII in 3. The difference of magnetic properties between 2 and 3 has been discussed.

关键词：配位聚合物磁学性质层结构喹啉酸烟酸合成反铁磁耦合构造

Supply and Demand Oriented Energy Management in the Internet of Things

在线全文

学校读者我要写书评

暂无评论

Advances in Internet of Things 2016年第1期6卷 1-17页

作者： Qingjuan Li Hong liu Huansheng Ning Yang Fu songde Hu Shunkun Yang School of Computer and Communication Engineering University of Science and Technology Beijing Beijing China Engineering Research Institute Run Technologies Co. Ltd. Beijing Beijing China Shenyang Branch Texas Instruments Semiconductor Technologies (Shanghai) Co. Ltd. Shanghai China School of Reliability and Systems Engineering Beihang University Beijing China

The Internet of Things (IoT) is emerging as an attractive paradigm involving physical perceptions, cyber interactions, social correlations and even cognitive thinking through a cyber-physical-social-thinking hyperspace. In this context, energy management with the purposes of energy saving and high efficiency is a challenging issue. In this work, a taxonomy model is established in reference to the IoT layers (i.e., sensor-actuator layer, network layer, and application layer), and IoT energy management is addressed from the perspectives of supply and demand to achieve green perception, communication, and computing. A smart home scenario is presented as a case study involving the main enabling technologies with supply-side, demand-side, and supply-demand balance considerations, and open issues in the field of IoT energy management are also discussed.

关键词： Internet of Things Internet of Energy Energy Management Smart Home Communication Green Computing