检索结果-南通市图书馆

Improving the performance of a thermoelectric power system using a flat-plate heat pipe

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2019年第1期27卷 44-53页

作者： suchen wu Yiwen Ding Chengbin Zhang Dehao Xu Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast University Nanjing ACME Electronics Cooling Service Inc.

A gravitational flat-plate heat pipe is designed and fabricated in this paper to serve as a heat spreader to diffuse the local heat source to the hot side of the thermoelectric power *** on this, an experimental test for the thermoelectric power generation system is conducted to study the influences of the heat spreader on the temperature uniformity and power generation performance when exposing to a local heat *** addition,the effects of the heating power, inclination angle, and local heat source size on the power generation performance of the thermoelectric power module using a flat-plate heat pipe as a heat spreader are examined and compared with that using a metal *** results indicate that the gravitational flat-plate heat pipe has considerable advantages over the metal plate in the temperature *** superiority of temperature uniformity in the improvement of power generation performance for the thermoelectric power system using a heat pipe is ***, the heat pipe shows good adaptability to placement mode and the local heat source size, which is beneficial to the application in the thermoelectric power generation.

关键词： Thermoelectric Heat pipe Heat spreader Power generation

乡村民宿发展助力共同富裕的实现机理与路径规范研究——以浙江省象山县为例

在线全文

学校读者我要写书评

暂无评论

中国农业资源与区划 2023年第11期44卷 227-236页

作者：包朝阳王玉庭吴粟琛中共浙江省宁波市象山县委员会中国农业科学院农业信息研究所北京第二外国语学院旅游科学学院

[目的]理清乡村民宿发展助力共同富裕的内在逻辑、实现机理，弥补现有研究实现机理不清的现状，并提出共同富裕目标下规范乡村民宿发展的可行路径。[方法]文章引入经典空间生产理论，结合典型案例分析方法，将构建的乡村民宿发展助力共... 详细信息

[目的]理清乡村民宿发展助力共同富裕的内在逻辑、实现机理，弥补现有研究实现机理不清的现状，并提出共同富裕目标下规范乡村民宿发展的可行路径。[方法]文章引入经典空间生产理论，结合典型案例分析方法，将构建的乡村民宿发展助力共同富裕分析框架应用于浙江省象山县的实证分析，理清逻辑机理与实现路径。[结果]（1）乡村民宿发展通过带动改善农村居住环境、公共服务和基础设施，实现乡村物质空间改造；（2）通过助力显化传统优秀文化资源价值、优化农村社会关系网络，实现乡村社会空间优化；（3）通过拓宽农村居民就业与收入渠道，延伸乡村产业链条，促进农村地区经济多元化发展，实现乡村经济空间提升。（4）整体来看，浙江省象山县在通过乡村民宿发展推动共同富裕目标实现过程中，体现出目标明确、路径清晰、保障到位三大基本特征。[结论]（1）高质量推进农村人居环境整治，改善发展的物质环境；（2）借助城乡融合发展，协同推进宅基地盘活利用、乡村金融制度改革、数字化改革等相关工作，挖掘改革协同价值，提升发展的社会环境；（3）探索多元化的“民宿+”模式，延长民宿产业链条，拓宽发展的经济空间。最终，进一步夯实共同富裕物质、精神、经济基础，推动实现共同富裕目标。

关键词：乡村民宿共同富裕空间生产理论实现机理路径规范

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

海洋晃荡条件下板式换热器流动冷凝实验研究

工程热物理学报 2024年第12期45卷 3791-3798页

作者：吴苏晨樊成成张文浩张程宾陈永平东南大学能源与环境学院南京210096

板式换热器是浮式海洋温差能发电平台等海洋装备的重要部件。为揭示海洋晃荡对板式换热器冷凝特性的影响,本文采用三自由度运动平台模拟海洋晃荡条件,设计搭建了板式换热器流动冷凝可视化实验系统,研究板式换热器在竖直、倾斜和摇摆姿... 详细信息

板式换热器是浮式海洋温差能发电平台等海洋装备的重要部件。为揭示海洋晃荡对板式换热器冷凝特性的影响,本文采用三自由度运动平台模拟海洋晃荡条件,设计搭建了板式换热器流动冷凝可视化实验系统,研究板式换热器在竖直、倾斜和摇摆姿态下的流动冷凝传热特性,重点分析倾斜和摇摆条件对板式换热器流动冷凝传热的影响特性。研究结果表明,相较于竖直姿态,垂直负倾角和水平正倾角条件下板式换热器冷凝传热性能弱,但垂直正倾角和水平负倾角条件均可改善冷凝传热性能。此外,提高摇摆幅度改善工质均流性,使得板式换热器冷凝传热性能提升,但冷凝传热性能对摇摆频率并不敏感。

关键词：板式换热器海洋晃荡两相流冷凝传热

在线全文

学校读者我要写书评

暂无评论

北京乡村民宿富民效应评价及提升路径

中国农业资源与区划 2024年第10期045卷 228-238页

作者：吴粟琛唐承财张旭李茁董宸旸北京第二外国语学院旅游科学学院北京旅游发展研究基地

[目的]定量分析乡村民宿富民效应，总结乡村民宿富民效应发展问题，寻找乡村民宿高质量发展新思路，有助于乡村振兴战略实施与共同富裕目标实现。[方法]文章以北京市平谷区、怀柔区与延庆区的乡村民宿为案例，通过层次分析法构建乡村民... 详细信息

[目的]定量分析乡村民宿富民效应，总结乡村民宿富民效应发展问题，寻找乡村民宿高质量发展新思路，有助于乡村振兴战略实施与共同富裕目标实现。[方法]文章以北京市平谷区、怀柔区与延庆区的乡村民宿为案例，通过层次分析法构建乡村民宿富民效应评价体系，汇总整理165户调研数据，从中选取具有代表性民宿36户作为典型案例，定量分析乡村民宿富民效应，以富民指数方式展现乡村民宿富民效应发展情况，研判限制乡村民宿富民效应发挥的主要问题，提出乡村民宿富民效应提升路径。[结果]乡村民宿业对当地居民的收入产生了正向影响，居民的收入水平和消费水平得到了提升，民宿产业水平积极赋能富民效应发展，带动就业能力强。[结论]北京乡村民宿富民效应显著，但也存在一些问题限制富民效应更好发挥，提出从民宿社区联动、深挖文化内涵、特色化发展、多元化经营和提升从业人员素质等方面提升乡村民宿富民效应。

关键词：乡村民宿富民效应乡村旅游农村发展乡村振兴共同富裕

Tectonic modes of mantle convection and their implications for Earth's tectonic evolution based on three-dimensional numerical simulations

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2025年第1期68卷 270-296页

作者： Song XIANG Jinshui HUANG Bingcheng wu School of Earth and Space Sciences University of Science and Technology of China CAS Center of Excellence in Comparative Planetary Studies

Five tectonic modes of mantle convection are obtained and analyzed with three-dimensional numerical models in a spherical shell domain. The five tectonic convective modes are non-plate mobile-lid, plate-like mobile-lid, episodic plate-like mobile-lid, episodic stagnant-lid, and stagnant-lid convective modes, respectively. The typical characteristics of these five tectonic modes and their numerical classification criteria based on plateness, mobility, and their standard deviations are presented and discussed. The results show that the yield stress of the lithosphere has profound effects on the tectonic convective *** the gradual increase of yield stress, the tectonic mode of mantle convection changes from one to another sequentially through the aforementioned five modes. Additionally, as the Rayleigh number increases, the range of yield stress for the platelike mobile-lid convective mode decreases, and the dimensionless transition stress between different tectonic modes ***, the dimensional transition stress between the non-plate mobile-lid convective mode and plate-like mobile-lid convective mode increases with the increase of Rayleigh number, but decreases between other tectonic modes. Furthermore, we find that the transition stress between different tectonic modes is inversely proportional to the internal heating rate, with the transition stress decreasing as the internal heating rate increases. The fitting analysis of the transition stress between tectonic modes shows that Earth's current plate tectonics correspond to a lithospheric yield stress of 150–250 MPa, which aligns with the strength of serpentinized mantle rock determined by experimental petrography. If the Archean mantle was 300°C warmer than it is today, then the Earth was in an episodic stagnant-lid convective mode. The tectonic evolution of the Earth's surface is closely related to the lithospheric strength and the process of thermal evolution. If the lithospheric strength w

关键词： Tectonic mode of mantle convection Plate-like mobile-lid convection Episodic plate-like mobile-lid convection Episodic stagnant-lid convection Plate tectonics and tectonic evolution of the Earth

Sex-dependent alterations in extracellular vesicles linking chronic spinal cord injury to brain neuroinflammation and neurodegeneration

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第2期20卷 483-484页

作者： Yun Li Junfang wu Department of Anesthesiology&Shock Trauma and Anesthesiology Research(STAR)CenterUniversity of Maryland School of MedicineBaltimoreMDUSA

Traumatic spinal cord injury(SCI)is a devastating exogenous injury with long-lasting consequences and a leading cause of death and disability *** in assistive technology,rehabilitative interventions,and the ability to identify and intervene in secondary conditions have significantly increased the long-term survival rate of SCI patients,with some people even living well into their seventh or eighth *** survival changes have led neurotrauma researchers to examine how SCI interacts with brain *** health and epidemiological data showed that patients with long-term SCI can have a lower life expectancy and quality of life,along with a higher risk of comorbidities and complications.

关键词： alterations inflammation injury

Crustal magma oxidation state and endowments in porphyry copper deposits

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2025年第1期68卷 226-236页

作者： Yumin AI Massimo CHIARADIA Chao wu Huayong CHEN Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of Geochemistry Chinese Academy of Sciences University of Chinese Academy of Sciences Department of Earth Sciences University of Geneva Guangdong Provincial Key Laboratory of Mineral Physics and Materials

Porphyry copper deposits（PCDs） supply the majority of the world's copper（Cu） as well as significant amounts of molybdenum（Mo） and gold（Au）. The formation of these deposits is controlled by a variety of geological factors, among which the magmatic oxidation is one of the focuses of current research. This study investigates the redox characteristics of arc magmas by analyzing the ratio of vanadium（V） to scandium（Sc） and its correlation with the oxygen fugacity （fO2） of magmas from arcs of various crustal thicknesses globally. We compiled an extensive dataset of published V/Sc values and studied the partition coefficients of Vand Sc between minerals and silicate melts across various magmatic environments. The results demonstrate that fractional crystallization of magnetite markedly reduces V/Sc values of the residual melt. Furthermore, magnesium number（Mg#） at the onset of magnetite fractionation is strongly positively correlated with fO2of the equilibrium magma. Based on this,the oxidation of arc magmas from different crustal thicknesses can be evaluated. The result suggests that magmas generated in crusts thicker than 20 km tend to be more oxidized with increasing crust thickness. This trend is attributed to enhanced intracrustal differentiation processes involving garnet and amphibole, particularly in mature island and continental arcs. In contrast,magmas in thinner arc crusts（<20 km）, which are significantly influenced by subducted slab materials, display higher oxidation states than most of their thicker crust counterparts. These findings suggest that both subduction dynamics and crustal thickness play a vital role in determining the oxidation state of arc magmas and, consequently, their capacity to generate PCDs. Highly oxidized, primitive arc magmas are less favorable for PCD formation due to that they tend to experience magnetite fractionation and thus sulfide saturation in the early stage of magma evolution, a process leading to copper depletion. On the contra

关键词： Magma evolution V/Sc systematics Magnetite Oxygen fugacity Porphyry copper deposits

A Verifiable Trust-Based CP-ABE Access Control Scheme for Cloud-Assisted Renewable Energy Systems

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2025年第1期82卷 1211-1232页

作者： Jiyu Zhang Kehe wu Ruomeng Yan Zheng Tian Yizhen Sun Yuxi wu Yaogong Guo Department of Control and Computer Engineering North China Electric Power UniversityBeijing102206China State Grid Information&Communication Company of Hunan Electric Power Corporation Changsha410118China State Grid Hunan Electric Power Corporation Chenzhou Power Supply Branch Chenzhou423000China

Renewable Energy Systems(RES)provide a sustainable solution to climate warming and environmental pollution by enhancing stability and reliability through status acquisition and analysis on cloud platforms and intelligent processing on edge servers(ES).However,securely distributing encrypted data stored in the cloud to terminals that meet decryption requirements has become a prominent research ***,managing attributes,including addition,deletion,and modification,is a crucial issue in the access control scheme for *** address these security concerns,a trust-based ciphertext-policy attribute-based encryption(CP-ABE)device access control scheme is proposed for RES(TB-CP-ABE).This scheme effectivelymanages the distribution and control of encrypted data on the cloud through robust attribute key *** introducing trust management mechanisms and outsourced decryption technology,the ES system can effectively assess and manage the trust worthiness of terminal devices,ensuring that only trusted devices can participate in data exchange and access sensitive ***,the ES system dynamically evaluates trust scores to set decryption trust thresholds,thereby regulating device data access permissions and enhancing the system’s *** validate the security of the proposed TB-CP-ABE against chosen plaintext attacks,a comprehensive formal security analysis is conducted using the widely accepted random oraclemodel under the decisional q-Bilinear Diffie-Hellman Exponent(q-BDHE)***,comparative analysis with other schemes demonstrates that the TB-CP-ABE scheme cuts energy/communication costs by 43%,and scaleswell with rising terminals,maintaining average latency below 50ms,ensuring real-time service *** proposed scheme not only provides newinsights for the secure management of RES but also lays a foundation for future secure energy solutions.

关键词： Access control renewable energy systems(RES) ciphertext-policy attribute-based encryption(CP-ABE) security

Hourglass-GCN for 3D Human Pose Estimation Using Skeleton Structure and View Correlation

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

Computers, Materials & Continua 2025年第1期82卷 173-191页

作者： Ange Chen Chengdong wu Chuanjiang Leng Faculty of Robot Science and Engineering Northeastern UniversityShenyang110169China

Previous multi-view 3D human pose estimation methods neither correlate different human joints in each view nor model learnable correlations between the same joints in different views explicitly,meaning that skeleton structure information is not utilized and multi-view pose information is not completely ***,existing graph convolutional operations do not consider the specificity of different joints and different views of pose information when processing skeleton graphs,making the correlation weights between nodes in the graph and their neighborhood nodes *** Graph Convolutional Networks(GCNs)cannot extract global and deeplevel skeleton structure information and view correlations *** solve these problems,pre-estimated multiview 2D poses are designed as a multi-view skeleton graph to fuse skeleton priors and view correlations explicitly to process occlusion problem,with the skeleton-edge and symmetry-edge representing the structure correlations between adjacent joints in each viewof skeleton graph and the view-edge representing the view correlations between the same joints in different *** make graph convolution operation mine elaborate and sufficient skeleton structure information and view correlations,different correlation weights are assigned to different categories of neighborhood nodes and further assigned to each node in the *** on the graph convolution operation proposed above,a Residual Graph Convolution(RGC)module is designed as the basic module to be combined with the simplified Hourglass architecture to construct the Hourglass-GCN as our 3D pose estimation ***-GCNwith a symmetrical and concise architecture processes three scales ofmulti-viewskeleton graphs to extract local-to-global scale and shallow-to-deep level skeleton features *** results on common large 3D pose dataset Human3.6M and MPI-INF-3DHP show that Hourglass-GCN outperforms some excellent methods in 3D pose estimati

关键词： 3D human pose estimation multi-view skeleton graph elaborate graph convolution operation Hourglass-GCN