检索结果-南通市图书馆

Properties analysis of a large flow-rate safety valve test device

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

Journal of Coal Science & Engineering(China) 2010年第2期16卷 210-214页

作者： WANG Yong JIANG Jin-qiu SHA Bao-yin sun hong-bo ZHAO Rui School of Electrical and Information Engineering China University of Mining ＆ Technology （Beijing） Beijing 100083 China Test Branch China Coal Research Institute Beijing 100013 China

In order to solve the problem of property test of large flow-rate safety, the property parameter of safety valve test system was analyzed, and a device for property oflarge flow-rate safety valve test was *** device used accumulators as power source and a united function cylinder, which can realized the large flow-rate output for the test *** the test data and made a particular research on the test device by testing different flow-rate safety valves;it verifies that the test device can be used tode-sign larger flow-rate safety valve test system and can make the flow-rate test and analysis and dynamic characteristics for the large-flow safety valve.

关键词： safety valve large flow rate test system supporting

Traffic safety helmet wear detection based on improved YOLOv5 network

在线全文

学校读者我要写书评

暂无评论

Optoelectronics Letters 2025年第1期21卷 35-42页

作者： GUI Dongdong sun bo College of Software Southeast University Quanzhou Equipment Research Centre Haixi Institute Chinese Academy of Sciences

Aiming at the problem that the current traffic safety helmet detection model can't balance the accuracy of detection with the size of the model and the poor generalization of the model, a method based on improving you only look once version 5(YOLOv5) is proposed. By incorporating the lightweight Ghost Net module into the YOLOv5 backbone network, we effectively reduce the model size. The addition of the receptive fields block(RFB) module enhances feature extraction and improves the feature acquisition capability of the lightweight model. Subsequently, the high-performance lightweight convolution, GSConv, is integrated into the neck structure for further model size compression. Moreover, the baseline model's loss function is substituted with efficient insertion over union(EIoU), accelerating network convergence and enhancing detection precision. Experimental results corroborate the effectiveness of this improved algorithm in real-world traffic scenarios.

关键词： Traffic control

Fabrication of Uniformly Growing Graphene Films via the Dip-coating Method

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Fabrication of Uniformly Growing Graphene Films via the Dip-...

2012 China Functional Materials Technology and Industry Forum

作者： YANG Juan sun hong-bo LI Dan School of Materials Science and Engineering Jiangsu University

The graphene(GE) films were fabricated in this paper through the deposition of graphene oxide(GO) sheets onto the quartz slide by means of dip-coating technique,followed by thermal *** growth process and transmittance of the film were monitored by ultraviolet and visible spectrophotometer(UV-Vis),the surface morphology and structure were investigated by Atomic force microscopy(AFM),Scanning electron microscopy(SEM),X-ray photoelectron spectroscopy (XPS) and *** sheet resistance of the film was also tested and results showed that the sheet resistance is about 60 kΩγ and the transmittance is as high as 81%(at 550 nm).

关键词： Graphene Films Dip-coating Sheet resistance Transmittance

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

船-缆拖曳系统操纵性能分析

船舶力学 2015年第11期19卷 1325-1333页

作者：孙洪波施朝健林文锦海海事大学商船学院上海200135 集美大学航海学院福建厦门361021 中海油服天津300450

为获取拖船在拖曳时的操纵性的变化规律。文章采用MMG船舶运动数学模型的建模思想,建立了六自由度拖船运动数学模型,采用有限差分法,建立了拖缆模型。然后,在此基础上建立将船-缆耦合起来以形成整个系统的运动数学模型,并分别采用龙格... 详细信息

为获取拖船在拖曳时的操纵性的变化规律。文章采用MMG船舶运动数学模型的建模思想,建立了六自由度拖船运动数学模型,采用有限差分法,建立了拖缆模型。然后,在此基础上建立将船-缆耦合起来以形成整个系统的运动数学模型,并分别采用龙格库塔方法对船舶运动积分求解,采用后向差分法对拖缆运动进行求解。通过对比仿真计算分析了水面拖船在拖带过程中的加速性能、旋回性能及偏转抑制性能。仿真结果表明在拖船与拖缆的相互影响下,拖船的加速性能和旋回性能有所下降而偏转抑制性能有所增强。

关键词：船舶运动数学模型有限差分加速性能旋回性能偏转抑制性能

在线全文

学校读者我要写书评

暂无评论

加劲水泥土搅拌桩承载力性状的有限元分析

合肥工业大学学报（自然科学版） 2011年第3期34卷 416-419页

作者：孙红波芜湖市勘察测绘设计研究院安徽芜湖241000

文章基于加劲水泥土搅拌桩现场试桩静载试验,采用大型有限元分析软件ANSYS对加劲水泥土搅拌桩模型和灌注桩模型进行了分析和研究。数值计算结果表明,通过合理的参数设定和接触模拟,试验和模拟的Q-s曲线吻合较好;加劲水泥土搅拌桩的承载... 详细信息

文章基于加劲水泥土搅拌桩现场试桩静载试验,采用大型有限元分析软件ANSYS对加劲水泥土搅拌桩模型和灌注桩模型进行了分析和研究。数值计算结果表明,通过合理的参数设定和接触模拟,试验和模拟的Q-s曲线吻合较好;加劲水泥土搅拌桩的承载力大于相同尺寸的灌注桩。分析结果为进一步揭示加劲水泥土搅拌桩的荷载传递机理提供了新的技术手段和依据。

关键词：水泥搅拌桩芯桩静载试验数值模拟

中国与其他新兴市场国家制造业贸易的特征比较

在线全文

学校读者我要写书评

暂无评论

中央财经大学学报 2010年第3期 51-56页

作者：于峰孙洪波上海应用技术学院上海200235 中国社会科学院北京100007

本文从实证上对20国集团内的中国与其他新兴市场国家制造业贸易特征进行比较,研究表明:与其他新兴市场国家制造业贸易相比,中国制造业贸易是大而不强、结构相近、暗藏风险。鉴此,本文提出中国应学习韩国和印度,走发展先进制造业和多品... 详细信息

本文从实证上对20国集团内的中国与其他新兴市场国家制造业贸易特征进行比较,研究表明:与其他新兴市场国家制造业贸易相比,中国制造业贸易是大而不强、结构相近、暗藏风险。鉴此,本文提出中国应学习韩国和印度,走发展先进制造业和多品种宽领域制造业的模式,并进一步指出制度创新、科技兴贸、现代制造业产业聚集区建设、制造业部门缺口填补等方面作为今后政策的四个着力点。

关键词：中国新兴市场国家制造业贸易特征

在线全文

学校读者我要写书评

暂无评论

青海东北部木里煤田控煤构造样式与找煤预测

地质通报 2010年第11期29卷 1696-1703页

作者：曹代勇孙红波孙军飞中国矿业大学/煤炭资源与安全开采国家重点实验室北京100083

在系统分析木里煤田构造格局和构造控煤特征的基础上,将本区控煤构造样式划分为压缩、剪切、滑动3大类和8种类型。揭示了控煤构造样式与煤系赋存之间的关系,木里煤田控煤构造样式以压缩为主,分布广泛,部分矿区构造样式表现为剪切和层滑... 详细信息

在系统分析木里煤田构造格局和构造控煤特征的基础上,将本区控煤构造样式划分为压缩、剪切、滑动3大类和8种类型。揭示了控煤构造样式与煤系赋存之间的关系,木里煤田控煤构造样式以压缩为主,分布广泛,部分矿区构造样式表现为剪切和层滑,各矿区煤系赋存状态受煤田构造格局的控制,具有南北分带、东西分段的特征。煤田边缘构造复杂,控煤构造样式以逆冲前锋型、逆冲断夹块型、逆冲-褶皱型和对冲型为主,含煤向斜形态多不完整;煤田中部地质构造相对简单,控煤构造样式以褶皱-断裂型为特征,含煤岩系赋存稳定,是有利的勘查开发区段。

关键词：青海木里煤田控煤构造样式找煤预测

Targets capture by distributed active swarms via bio-inspired reinforcement learning

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 210-221页

作者： Kun Xu Yue Li Jun sun Shuyuan Du Xinpeng Di Yuguang Yang bo Li Institute of Biomechanics and Medical Engineering Applied Mechanics Laboratory Department of Engineering MechanicsTsinghua University Institute of Nuclear and New Energy Technology Tsinghua University Shanghai Aerospace Control Technology Institute Shanghai Key Laboratory of Aerospace Intelligent Control Technology College of Automation Engineering Nanjing University of Aeronautics and Astronautics

Natural swarms arranged from cells to herds are usually decentralized but display intriguing collective intelligence in coordinating individuals across large scales to efficiently achieve their common goals. Learning from nature may provide new strategies for controlling collective dynamics of synthetic swarms to accomplish specific functions. Here, we present a bioinspired computational framework that steers distributed active swarms to collectively capture and merge targets via reinforcement learning. We exploit collective milling structures of natural herds to cage the targets, and adopt a switching control policy inspired by sperms' chiral dynamics to optimize the trajectories of individuals, through which the active swarms can selforganize to enclose single or multiple distant targets in a dynamical, adaptive and scalable manner. There exists a critical swarm size, beyond which the excessive competition between agents would generate large mechanical forces, leading to capture instability but enabling the transition from short-distance to long-distance merging capture of multiple targets. This work provides physical insights into distributed active swarms and could offer a multilevel, decentralized strategy toward controlling swarm robotics in wide applications such as bio-medical devices, machine immunity, and target clearance.

关键词： swarm intelligence robotics multi-tasks artificial intelligence bionics

新兴市场与中国地区贸易政策——拉美与非洲的比较

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

宁夏社会科学 2009年第6期 55-58,62页

作者：于峰孙洪波上海应用技术学院上海200235 中国社会科学院拉丁美洲研究所北京100007

拉美和非洲新兴市场在我国对外贸易中的地位日益重要,特别是在当前发达国家经济发展不稳定形势下,进一步开拓拉美、非洲市场具有战略意义。本文从政策目标、政策工具和实施机制,回顾我国对拉美和非洲的贸易政策,在肯定成就的同时,指出... 详细信息

拉美和非洲新兴市场在我国对外贸易中的地位日益重要,特别是在当前发达国家经济发展不稳定形势下,进一步开拓拉美、非洲市场具有战略意义。本文从政策目标、政策工具和实施机制,回顾我国对拉美和非洲的贸易政策,在肯定成就的同时,指出现行政策存在的问题,提出完善未来地区贸易政策的建议。

关键词：拉美非洲地区贸易政策比较