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Plasmonic Cu_(27)S_(24)nanocages for novel solar photothermal nanoink and nanofilm

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Nano Research 2022年第4期15卷 3161-3169页

作者： Min Xi Longchang Xu Nian Li shudong zhang Zhenyang Wang Institute of Solid State Physics and Key Laboratory of Photovoltaic and Energy Conservation Materials Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China The Key Laboratory Functional Molecular Solids Ministry of Education Anhui Normal UniversityWuhu 241002China School of Mechatronics and Vehicle Engineering Chongqing Jiaotong UniversityChongqing 400074China

Copper sulfide(Cu_(x)S)as a plasmonic solar photothermal semiconductor material that expands the light collection range by altering localized surface plasmon resonance(LSPR)to the near-to mid-infrared(IR)spectral *** versatile synthesis strategies of Cu_(x)S nanostructure offer its variability of morphology and provide additional freedom in tuning the optical ***,nanocage(or nanoshell)has hybridized plasmon resonances as a result of super-positioned nanosphere and nanocavity,which extends its receiving range of solar spectrum and increases light-to-heat conversion ***,we offer novel“nanoink”and“nanofilm”developed from colloidal Cu_(27)S_(24)nanocages with excellent solar photothermal *** combining experimental measurement and theoretical calculation,we estimated the optical properties of covellite Cu_(27)S_(24).And based on obtained dielectric functions,we then calculated its solar photothermal performance,which was further validated by our experimental *** simulation results showed that hollow Cu_(27)S_(24)nanocages have excellent solar photothermal performance,and exhibit much higher solar photothermal conversion efficiency than solid Cu_(27)S_(24)nanospheres.

关键词： plasmonics solar photothermal hybridized plasmon Cu_(27)S_(24)nanocages

Large-Sized Ankylosaur(Dinosauria) from the Lower Cretaceous Jiufotang Formation of Western Liaoning,China

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Acta Geologica Sinica(English Edition) 2014年第4期88卷 1060-1065页

作者： JI Shu-an zhang Lijun zhang shudong zhang Lijun 1 JIANG Shan Institute of Geology Chinese Academy of Geological Sciences Key Laboratory of Stratigraphy andPaleontology Ministry of Land and Resources Beijing 100037 China Administration Bureau of Fossil Resource Protection of Liaoning Province Shenyang 110032 Liaoning China Administration Branch of Fossil Protection Bureau of Land and Resources of Kazuo County Kazuo122300 Liaoning China Shenyang Center of the China Geological Survey Shenyang 110034 Liaoning China

Two incomplete bones referred to ankylosaur scapulocoracoid and humerus are described, which were discovered from the Early Cretaceous Jiufotang Formation of Dachengzi Town, Kazuo County, Liaoning Province. Ankylosaur dinosaurs have ever been found in the Lower Cretaceous Yixian, Fuxin and Sunjiawan Formations of western Liaoning. The occurrence of ankylosaurs within Jiufotang Formation improves our knowledge on the ankylosaur stratigraphic distribution. Based on the length of scapulocoracoid, the new dinosaur is estimated to exceed 6.0 meters long, representing the largest ankylosaur in western Liaoning.

关键词： Kazuo County Liaoning Province Lower Cretaceous Jiufotang Formation Ankylosauria

A New High-Precision and Lightweight Detection Model for Illegal Construction Objects Based on Deep Learning

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Tsinghua Science and Technology 2024年第4期29卷 1002-1022页

作者： Wenjin Liu Lijuan Zhou shudong zhang Ning Luo Min Xu School of Cyberspace Security(School of Cryptology) Hainan UniversityHaikou 570228China School of Information Engineering Capital Normal UniversityBeijing 100048China

Illegal construction has caused serious harm around the world. However, current methods are difficult to detect illegal construction activities in time, and the calculation complexity and the parameters of them are large. To solve these challenges, a new and unique detection method is proposed, which detects objects related to illegal buildings in time to discover illegal construction activities. Meanwhile, a new dataset and a high-precision and lightweight detector are proposed. The proposed detector is based on the algorithm You Only Look Once (YOLOv4). The use of DenseNet as the backbone of YDHNet enables better feature transfer and reuse, improves detection accuracy, and reduces computational costs. Meanwhile, depthwise separable convolution is employed to lightweight the neck and head to further reduce computational costs. Furthermore, H-swish is utilized to enhance non-linear feature extraction and improve detection accuracy. Experimental results illustrate that YDHNet realizes a mean average precision of 89.60% on the proposed dataset, which is 3.78% higher than YOLOv4. The computational cost and parameter count of YDHNet are 26.22 GFLOPs and 16.18 MB, respectively. Compared to YOLOv4 and other detectors, YDHNet not only has lower computational costs and higher detection accuracy, but also timely identifies illegal construction objects and automatically detects illegal construction activities.

关键词： object detection lightweight illegal buildings illegal construction objects high-precision

Aqueous Synthesis of Mesostructured BiVO_(4) Quantum Tubes with Excellent Dual Response to Visible Light and Temperature

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Nano Research 2010年第9期3卷 620-631页

作者： Yongfu Sun Yi Xie Changzheng Wu shudong zhang Shishi Jiang Hefei National Laboratory for Physical Sciences at Microscale University of Science and Technology of ChinaHefei 230026China

Analysis of the atomic structure of monoclinic BiVO4 reveals its fascinating structure-related dual response to visible light and *** there have been a few reported studies of its responses to visible light and temperature,an understanding of the effects of quantum size,particle shape or specific exposed facets on its dual responsive properties remains elusive;this is primarily due to the limited availability of high-quality monodisperse nanocrystals with extremely small sizes and specific_(4)exposed ***,we describe a novel assembly-fusion strategy for the synthesis of mesostructured monoclinic BiVO_(4)quantum tubes with ultranarrow diameter of 5 nm,ultrathin wall thickness down to 1 nm and exposed{020}facets,via a convenient hydrothermal method at temperatures as low as 100℃.Notably,the resulting high-quality quantum tubes possess significantly superior dual-responsive properties compared with bulk BiVO_(4)or even BiVO4 nanoellipsoids,and thus,show high promise for applications as visible-light photocatalysts and temperature indicators offering improved environmental quality and *** mild and facile methodology should be capable of extension to the preparation of other mesostructured inorganic quantum tubes with similar characteristics,giving a range of materials with enhanced dual-responsive properties.

关键词： Mesostructure BiVO_(4) quantum tubes visible light temperature

Nucleation and growth mechanism of cefodizime sodium at different solvent compositions

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Frontiers of Chemical Science and Engineering 2013年第4期7卷 490-495页

作者： Xinwei zhang shudong zhang Xiaodan SUN Zequn YIN Quanjie LIU Xiwen zhang Qiuxiang YIN Fushun Research Institute of Petroleum and Petrochemicals SINOPEC Fushun 113001 China School of Chemical Engineering and Technology State Key Laboratory of Chemical Engineering Tianjin University Tianjin 300072 China

The induction time of cefodizime sodium was measured in ethanol-water at different solvent composi- tions by the laser technology measurement. The results indicate that the solvent composition played an important role in the supersaturation and the nucleation process of cefodizime sodium solution. According to the modified classical nucleation theory, the nucleation and growth mechanism were identified. The correlation results show that heterogeneous nucleation dominated the nucleation process at lower supersaturation, where homogeneous nucleation is the most important mechanism at higher supersaturation. Based on the correlated results, the 2D mediated growth mechanism had the highest correlation coefficients （R2）, so this mechanism was selected as the proper growth mechanism for cefodizime sodium.

关键词： cefodizime sodium induction time primarynucleation growth mechanism

碳酸盐岩储层随钻测井技术难点及其对策——以四川盆地为例

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天然气工业 2015年第11期35卷 16-22页

作者：张树东中国石油川庆钻探工程公司测井公司

四川盆地碳酸盐岩储层埋藏深、非均质性强,利用随钻测井资料开展地质导向存在构造导向难、空隙空间储层追踪难和轨迹控制难等诸多难题。为此,分析了这类储层多套层系的地质和测井响应特征,提出了构造追踪、储层追踪和地层追踪等针对性... 详细信息

四川盆地碳酸盐岩储层埋藏深、非均质性强,利用随钻测井资料开展地质导向存在构造导向难、空隙空间储层追踪难和轨迹控制难等诸多难题。为此,分析了这类储层多套层系的地质和测井响应特征,提出了构造追踪、储层追踪和地层追踪等针对性的技术思路,并总结了随钻伽马成像、随钻电阻率成像、随钻密度成像、随钻自然伽马、随钻电阻率、随钻中子和随钻密度测井方法在随钻地质导向中的适应性;在此基础上,充分挖掘随钻测井所提供的信息,对常见的4种复杂储层类型(薄层状储层、厚层块状储层、受剥蚀的岩溶储层和页岩气储层)的测井系列进行优化,提出了不同地层和储层条件下适用的5种测井组合(自然伽马+孔隙度+电阻率成像、自然伽马+电阻率成像、自然伽马+孔隙度+电阻率、伽马成像+电阻率、自然伽马)。现场应用效果表明,该方法针对碳酸盐岩不同类型储层首次归纳出应采用的随钻测井系列组合,并且有针对性地指出了在地质导向过程中应注意的重点及采取的导向策略,具有较高的参考和应用价值。

关键词：四川盆地碳酸盐岩储集层随钻测井地质导向技术难点精细地质建模测井系列优化

A classification of hydrological climatic seasons in the China seas

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Acta Oceanologica Sinica 1993年第1期12卷 63-78页

作者： Chen Shangji,He Weihuan Yao Shiyu and zhang shudong National Marine Data and Information Service, State Oceanic Administration, Tianjin 300171, China China

By using a method of boundary temperature index of seasons, a classification of hydrological climatic seasons in the China seas is made on the basis statistics of the sea surface air and water temperatures over the years. The results indicate that the assignment of hydrological seasons in the China seas differs with various sea areas. It may be divided into three climatic belts. In the temperate zone area, four seasons are clearly distinct with very long winter. While in the subtropical zone area, there is no winter throughout the year. The autumn is linked together with the spring, and the summer is unusually long. As for the tropical zone area, it is summer all the year round without any other seasons. In addition , the regular pattern of transformation of the four seasons and the regional characteristics of the length of each season are analyzed in greater detail. The results are in agreement with the continental seasonal classification and it is also shown that the results are reasonable and reliable through test and verification.

关键词： area line

Consideration Upon Improving the Online Teaching Platform Development of Ideological and Political Theory Courses

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Consideration Upon Improving the Online Teaching Platform De...

Study on Complementary Mode of Practice Teaching with Theoretical Teaching in Ideological and Political Theory Course---based on the Network Learning Platform

2013年教育技术与管理科学国际会议

作者： zhang shudong Chen Chunyan College of Marxism Changchun University of Science and Technology

Based on the necessity of building the online teaching platform of ideological and political theory courses, the essay discusses the design of the basic module of the online teaching platform of ideological and politi... 详细信息

关键词： Ideological and political theory courses Online Teaching Platform

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Study on Complementary Mode of Practice Teaching with Theore...