检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

外骨骼机器人关节驱动及优化研究

自动化应用 2022年第10期 98-100页

作者：汪强胡江平苗怀彬熊佳伟刘春宝浙江国丰集团有限公司浙江杭州311215 吉林大学吉林长春130022

随着工业4.0时代的到来,我国正加速向工业4.0迈进。以智能制造为主导,将工业机器人和传统制造业有机结合,充分利用先进技术实现产品质量、安全和生产效率的提高。外骨骼机器人作为一种特殊机械设备,是为改善下肢功能障碍人士及行动不便... 详细信息

随着工业4.0时代的到来,我国正加速向工业4.0迈进。以智能制造为主导,将工业机器人和传统制造业有机结合,充分利用先进技术实现产品质量、安全和生产效率的提高。外骨骼机器人作为一种特殊机械设备,是为改善下肢功能障碍人士及行动不便人士而设计的。外骨骼机器人能在特定的环境下帮助运动机能障碍人士进行训练和生活自理功能重建,并且其机械关节驱动系统能够对关节进行运动控制。在外骨骼机器人设计过程中,采用动态驱动、伺服驱动器、自适应可调节关节及柔性传动装置。通过建立某医院辅助服务外骨骼机器人的动力学模型和电机驱动参数库,提出一种优化外骨骼机器人驱动系统的方法。

关键词：外骨骼机器人关节驱动优化研究

在线全文

学校读者我要写书评

暂无评论

一种液压控制的吊卡旋转装置研制

机械工程师 2016年第10期 7-8页

作者：祝贺闫文辉杨艳刘春宝叶强金连登李伦西安石油大学西安710065 宝鸡石油机械有限责任公司陕西宝鸡721002

为了解决钻杆自动送入作业问题,研制了一种吊卡旋转装置。文中介绍了吊卡旋转装置结构功能及参数,液压和电控控制系统及装置的研制情况。经油田现场工业性试验表明,该吊卡旋转装置通过使用双平衡阀,可有效防止吊卡由于振荡使得旋转油缸... 详细信息

为了解决钻杆自动送入作业问题,研制了一种吊卡旋转装置。文中介绍了吊卡旋转装置结构功能及参数,液压和电控控制系统及装置的研制情况。经油田现场工业性试验表明,该吊卡旋转装置通过使用双平衡阀,可有效防止吊卡由于振荡使得旋转油缸损坏。装置工作性能稳定,布局合理,整体安装和拆卸方便。

关键词：吊卡液压驱动旋转装置

在线全文

学校读者我要写书评

暂无评论

穆利亚希阴极铜质量控制技术研究与应用

有色金属（冶炼部分） 2025年第1期 34-42,49页

作者：刘亚平王晶军张礼强刘子良尹君贾丽娜李阳寇珏孙春宝中色卢安夏铜业有限公司赞比亚卢安夏90456 北京科技大学土木与资源工程学院北京100083

赞比亚穆利亚希氧化铜矿矿石性质复杂,采用硫酸浸出—萃取—电积工艺进行处理。为降低杂质对电积作业的影响、有效控制并提高阴极铜产品质量,深入追踪到浸出、萃取等多个作业系统开展了技术创新研究与应用,包括搅拌浸出分支加酸、浸出... 详细信息

赞比亚穆利亚希氧化铜矿矿石性质复杂,采用硫酸浸出—萃取—电积工艺进行处理。为降低杂质对电积作业的影响、有效控制并提高阴极铜产品质量,深入追踪到浸出、萃取等多个作业系统开展了技术创新研究与应用,包括搅拌浸出分支加酸、浸出液多级净化、高效萃取、负载有机相净化除杂等。结果表明:穆利亚希湿法冶炼厂通过多种技术的研究和应用,从生产源头及过程降低了有害离子、絮凝物的含量,减轻了杂质对电积作业的影响,成功将电流效率提升至96%以上,阴极铜产品的平均纯度提升至99.9988%,50%以上的阴极铜纯度超过99.9990%,实现了企业提质增效的目的。

关键词：氧化铜矿分支加酸浸出液净化萃取负载有机相净化除杂阴极铜

Co-pyrolysis of soybean soapstock with iron slag/aluminum scrap,and characterization and analysis of their products

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2023年第1期53卷 25-36页

作者： Xueguang Li Mengyan Yu Changfa Zhang Xiangtong Li Guangqing liu Jianjun Dai chunbao Zhou Yang liu Jie Fu Yingwen Zhang Bang Yao State Key Laboratory of Organic-Inorganic Composites College of Chemical EngineeringBeijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China

Soybean soapstock(SS) is one of the main solid wastes produced in the refinery of edible oil processing. In this study, the co-pyrolysis of SS with iron slag(IS) and aluminum scrap(AS) was carried out in a tubular furnace. The gas, liquid and solid products were characterized and the char yield decreased with increasing IS/AS ratio. IS and AS can improve the gas yield, and when the ratio of SS/IS was 1:0.25, the total pyrolysis gas and hydrogen contents were significantly increased. The content of oxygen compounds in pyrolysis oil decreased during co-pyrolysis, while AS promoted the content of polycyclic aromatic hydrocarbons in pyrolysis oil. The co-pyrolysis reaction can be divided into four stages, the mass loss rate reaches the maximum at the third stage(390–575 ℃). The molar ratio of H/C was lower for pyrolysis,indicating good stability of pyrolysis char owing to the high degree of carbonization and *** possible co-pyrolysis reaction mechanism was explored.

关键词： Pyrolysis Soybean soapstock Iron slag Aluminum scrap Adsorption Catalyst

在线全文

学校读者我要写书评

暂无评论

陆地钻机立根排放系统研究现状分析

石油机械 2016年第10期44卷 25-29页

作者：杨海刚曹晓宇刘春宝石梦蕊邢广亮安浩宝鸡石油机械有限责任公司国家油气钻井装备工程技术研究中心

在介绍国内外陆地钻机立根排放系统发展现状的基础上,对立根排放系统进行了技术分析,主要包括悬持式、推扶式、悬持与推扶相结合3种立根排放系统,并对3种立根排放系统进行了对比,其主要不同在于对井架载荷的影响、工作效率与安全性以及... 详细信息

在介绍国内外陆地钻机立根排放系统发展现状的基础上,对立根排放系统进行了技术分析,主要包括悬持式、推扶式、悬持与推扶相结合3种立根排放系统,并对3种立根排放系统进行了对比,其主要不同在于对井架载荷的影响、工作效率与安全性以及钻机配套适应性。开发立根排放系统需攻克的关键技术有排放模式及载荷分析、控制系统设计以及系统安全性设计。最后建议加快悬持与推扶相结合的立根排放系统开发,并注重系统的安装、维护和搬家方便性。

关键词：陆地钻机立根排放系统技术现状发展建议

A compact and reconfigurable low noise amplifier employing combinational active inductors and composite resistors feedback techniques

在线全文

学校读者我要写书评

暂无评论

High Technology Letters 2021年第1期27卷 38-42页

作者： Zhang Zheng Zhang Yanhua Yang Ruizhe Shen Pei Ding chunbao liu Yaze Huang Xin Chen Jitian Faculty of Information Technology Beijing University of TechnologyBeijing 100124P.R.China

A compact and reconfigurable low noise amplifier(LNA)is proposed by combining an input transistor,composite transistors with Darlington configuration as the amplification and output transistor,T-type structure composite resistors instead of a simplex structure resistor,a shunt inductor feedback realized by a tunable active inductor(AI),a shunt inductor peaking technique realized by another tunable *** division and collaboration among different resistances in the T-type structure composite resistor realize simultaneously input impedance matching,output impedance matching and good noise performance;the shunt feedback and peaking technique using two tunable AIs not only extend frequency bandwidth and improve gain flatness,but also make the gain and frequency band can be tuned simultaneously by the external bias of tunable AIs;the Darlington configuration of composite transistors provides high gain;furthermore,the adoption of the small size AIs instead of large size passive spiral inductor,and the use of composite resistors make the LNA have a small *** LNA is fabricated and verified by GaAs/InGaP hetero-junction bipolar transistor(HBT)*** results show that at the frequency of 7 GHz,the gain S_(21)is maximum and up to 19 dB;the S_(21)can be tuned from 17 dB to 19 dB by tuning external bias of tunable AIs,that is,the tunable amount of S_(21)is 2 dB,and similarly at 8 GHz;the tunable range of 3 dB bandwidth is 1 *** addition,the gain S_(21)flatness is better than 0.4 dB under frequency from 3.1 GHz to 10.6 GHz;the size of the LNA only has 760μm×1260μm(including PADs).Therefore,the proposed strategies in the paper provide a new solution to the design of small size and reconfigurable ultra-wideband(UWB)LNA and can be used further to adjust the variations of gain and bandwidth of radio frequency integrated circuits(RFICs)due to package,parasitic and the variation of fabrication process and temperature.

关键词： variable gain variable bandwidth low noise amplifier(LNA) resistance feedback tunable active inductor(AI)

在线全文

学校读者我要写书评

暂无评论

GC 2L4型钻井管柱自动化处理系统研制

石油矿场机械 2016年第11期45卷 66-69页

作者：黄悦华刘春宝王耀华买成华邢广亮王翠白丙建宝鸡石油机械有限责任公司陕西宝鸡721002 国家油气钻井装备工程技术研究中心陕西宝鸡721002

为提高钻井作业效率、降低操作人员劳动强度,提高操作安全性,同时为了提高钻机的自动化、智能化水平。研制了GC 2L4型钻井管柱自动化处理系统,通过配置举升式动力猫道、自动井架工、液压吊卡、铁钻工等机械化设备,与顶驱装置配合实现钻... 详细信息

为提高钻井作业效率、降低操作人员劳动强度,提高操作安全性,同时为了提高钻机的自动化、智能化水平。研制了GC 2L4型钻井管柱自动化处理系统,通过配置举升式动力猫道、自动井架工、液压吊卡、铁钻工等机械化设备,与顶驱装置配合实现钻杆、钻铤、套管等钻井管柱的机械化输送、机械化建立根、立根自动化排放等作业,实现高效、安全、低作业强度的管柱自动化处理作业模式。通过钻机集成双司钻智能控制平台,实现管柱处理系统的自动化远程集中控制。

关键词：钻井管柱自动化处理系统

A comparison of hepatic lipid metabolism and fatty acid composition in muscle between Duroc×Landrace×Yorkshire and Tibetan pigs from three regions

在线全文

学校读者我要写书评

暂无评论

Food Materials Research 2022年第1期2卷 66-73页

作者： Zhikang Yin Fan liu Xuedong Gu Li Zhang Yuan Ma Miao Zhang Hui liu Jing Yan chunbao Li Key Laboratory of Meat Processing and Quality Control MOEKey Laboratory of Meat ProcessingMARAJiangsu Collaborative Innovation Center of Meat Production and ProcessingQuality and Safety ControlCollege of Food Science and TechnologyNanjing Agricultural UniversityNanjing 210095P.R.China College of Food Science Tibet Agriculture and Animal Husbandry UniversityNyingchi 860000P.R.China College of Food Science and Engineering Gansu Agricultural UniversityLanzhou 730070P.R.China School of Food and Bioengineering Xihua UniversityChengdu 610039P.R.China

Qinghai-Tibet plateau with an average altitude above 4,000 m provides favorable conditions for Tibetan pigs that may have different meat quality from other pig *** study was designed to compare the differences in lipid metabolism in liver and fatty acid composition in muscle between Tibetan and Duroc×Landrace×Yorkshire(DLY)*** Tibetan pigs(n=10),Gannan Tibetan pigs(n=9),Nyingchi Tibetan pigs(n=10)and DLY pigs(n=10)were selected for the *** fasting for 12 h,they were slaughtered and blood,liver and muscle samples were taken for biochemical *** results showed that the intramuscular fat content was not significantly different for Tibetan pigs among the three regions(P>0.05),which was significantly higher than that of DLY pigs(P<0.05).However,the liver fat content of Gannan Tibetan pigs was significantly lower than those of DLY pigs and Aba and Nyingchi Tibetan pigs(P<0.05).The hepatic lipid metabolism may be stronger in DLY pigs than in Tibetan pigs,but lipid deposition in muscle is weaker in DLY pigs than that in Tibetan *** Tibetan pigs and Nyingchi Tibetan pigs had similar proportions of saturated,monounsaturated and polyunsaturated fatty acids,while Gannan Tibetan pigs and DLY pigs had similar types of fatty *** findings provide new insight into mechanisms of environmental and breed effects on pork quality.

关键词： Tibetan metabolism pigs

Enhancing XRF sensor-based sorting of porphyritic copper ore using particle swarm optimization-support vector machine(PSO-SVM)algorithm

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

International Journal of Mining Science and Technology 2024年第4期34卷 545-556页

作者： Zhengyu liu Jue Kou Zengxin Yan Peilong Wang Chang liu chunbao Sun Anlin Shao Bern Klein School of Civil and Resources Engineering University of Science and TechnologyBeijing 100083China Institute of Minerals Research University of Science and TechnologyBeijing 100083China State Key Laboratory of Mineral Processing Beijing 102628China Ansteel Group Mining Co.Ltd. Anshan 114000China Norman B.Keevil Institute of Mining Engineering University of British ColumbiaVancouverBC V6T 1Z4Canada

X-ray fluorescence(XRF)sensor-based ore sorting enables efficient beneficiation of heterogeneous ores,while intraparticle heterogeneity can cause significant grade detection errors,leading to misclassifications and hindering widespread technology *** classification models are crucial to determine if actual grade exceeds the sorting threshold using localized XRF *** studies mainly used linear regression(LR)algorithms including simple linear regression(SLR),multivariable linear regression(MLR),and multivariable linear regression with interaction(MLRI)but often fell short attaining satisfactory *** study employed the particle swarm optimization support vector machine(PSO-SVM)algorithm for sorting porphyritic copper ore ***-scale results showed PSO-SVM out-performed LR and raw data(RD)models and the significant interaction effects among input features was *** poor input data quality,PSO-SVM demonstrated exceptional ***-scale sorting achieved 93.0%accuracy,0.24%grade increase,84.94%recovery rate,57.02%discard rate,and a remarkable 39.62 yuan/t net smelter return(NSR)increase compared to no *** improvements were achieved by the PSO-SVM model with optimized input combinations and highest data quality(T=10,T is XRF testing times).The unsuitability of LR methods for XRF sensor-based sorting of investigated sample is *** element selection and mineral association analysis elucidate element importance and influence mechanisms.

关键词： XRF sensor-based sorting PSO-SVM algorithm Copper ore pebble Receiver operating curve(ROC) Net smelter return(NSR)