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Review of fluid and control technology of hydraulic wind turbines
Maolin CAI, Yixuan WANG, Zongxia JIAO, Yan SHI
《机械工程前沿(英文)》 2017年 第12卷 第3期 页码 312-320 doi: 10.1007/s11465-017-0433-2
This study examines the development of the fluid and control technology of hydraulic wind turbines. The current state of hydraulic wind turbines as a new technology is described, and its basic fluid model and typical control method are expounded by comparing various study results. Finally, the advantages of hydraulic wind turbines are enumerated. Hydraulic wind turbines are expected to become the main development direction of wind turbines.
关键词: wind turbine hydraulic system fluid model control technology
An adaptive sliding mode control technology for weld seam tracking
Jie LIU,Youmin HU,Bo WU,Kaibo ZHOU,Mingfeng GE
《机械工程前沿(英文)》 2015年 第10卷 第1期 页码 95-101 doi: 10.1007/s11465-015-0332-3
A novel adaptive sliding mode control algorithm is derived to deal with seam tracking control problem of welding robotic manipulator, during the process of large-scale structure component welding. The proposed algorithm does not require the precise dynamic model, and is more practical. Its robustness is verified by the Lyapunov stability theory. The analytical results show that the proposed algorithm enables better high-precision tracking performance with chattering-free than traditional sliding mode control algorithm under various disturbances.
关键词: weld seam tracking welding robotic manipulator adaptive control sliding mode control
Bridging science, technology and policy in emerging contaminants control
《环境科学与工程前沿(英文)》 2023年 第17卷 第5期 doi: 10.1007/s11783-023-1665-5
Noise control technology for generator sets in enclosures
ZHANG Nailong, YANG Wentong, FEI Renyuan
《机械工程前沿(英文)》 2008年 第3卷 第4期 页码 377-384 doi: 10.1007/s11465-008-0051-0
关键词: equipment generator sound-attenuated enclosure convenient Enclosure development
FULL TIME-SPACE GOVERNANCE STRATEGY AND TECHNOLOGY FOR CROPLAND NON-POINT POLLUTION CONTROL IN CHINA
《农业科学与工程前沿(英文)》 2023年 第10卷 第4期 页码 593-606 doi: 10.15302/J-FASE-2023522
Ensuring food safety while reducing agricultural non-point source pollution is quite challenging, especially in developing and underdeveloped countries. Effective systematic strategies and comprehensive technologies need to be developed for agricultural non-point source pollution control at the watershed scale to improve surface water quality. In this review, a proposal is made for a full time-space governance strategy that prioritizes source management followed by endpoint water pollution control. The 4R chain technology system is specifically reviewed, including source reduction, process retention, nutrient reuse and water restoration. The 4R chain technology system with the full time-space governance strategy was applied at the scale of an administrative village and proved to be a feasible solution for reducing agricultural non-point source pollution in China. In the future, a monitoring system needs to be established to trace N and P transport. Additionally, new smart fertilizer and intelligent equipment need to be developed, and relevant governance standards and supportive policies need to be set to enhance the efficacy of agricultural non-point source pollution control.
关键词: 4R chain technology system agricultural non-point source pollution case study full time-space governance strategy
The development of pollution control technology in coal combustion in China
XU Xuchang, ZHANG Hu, ZHUO Yuqun, TONG Huiling, WANG Shujuan, LI Yan
《能源前沿(英文)》 2007年 第1卷 第1期 页码 9-15 doi: 10.1007/s11708-007-0002-1
关键词: development CO emission desulphurization future research emission
System engineering for water pollution control at the watershed level in China
Wei MENG,
《环境科学与工程前沿(英文)》 2009年 第3卷 第4期 页码 443-452 doi: 10.1007/s11783-009-0037-0
关键词: water pollution control watershed system engineering sustainability integrated watershed management key specific project of science and technology
GUAN Zailin, PENG Yunfang, MA Li, ZHANG Chaoyong, LI Peigen
《机械工程前沿(英文)》 2008年 第3卷 第4期 页码 454-461 doi: 10.1007/s11465-008-0083-5
关键词: appropriate management technology scheduling technology different
Precision forging technology for aluminum alloy
Lei DENG, Xinyun WANG, Junsong JIN, Juchen XIA
《机械工程前沿(英文)》 2018年 第13卷 第1期 页码 25-36 doi: 10.1007/s11465-018-0477-y
Aluminum alloy is a preferred metal material for lightweight part manufacturing in aerospace, automobile, and weapon industries due to its good physical properties, such as low density, high specific strength, and good corrosion resistance. However, during forging processes, underfilling, folding, broken streamline, crack, coarse grain, and other macro- or microdefects are easily generated because of the deformation characteristics of aluminum alloys, including narrow forgeable temperature region, fast heat dissipation to dies, strong adhesion, high strain rate sensitivity, and large flow resistance. Thus, it is seriously restricted for the forged part to obtain precision shape and enhanced property. In this paper, progresses in precision forging technologies of aluminum alloy parts were reviewed. Several advanced precision forging technologies have been developed, including closed die forging, isothermal die forging, local loading forging, metal flow forging with relief cavity, auxiliary force or vibration loading, casting-forging hybrid forming, and stamping-forging hybrid forming. High-precision aluminum alloy parts can be realized by controlling the forging processes and parameters or combining precision forging technologies with other forming technologies. The development of these technologies is beneficial to promote the application of aluminum alloys in manufacturing of lightweight parts.
关键词: precision forging aluminum alloy closed die forging flow control forging hybrid-forming technology
李旭华,方刚,党春阁,于秀玲
《中国工程科学》 2013年 第15卷 第3期 页码 56-61
电解锰行业废水排放量大,污染物浓度高,属于高污染行业,是我国实现污染物控制减排的主要威胁之一。通过对电解锰行业污染防治现状进行分析,构建了污染防治技术评估指标体系,利用层次分析法确定各评价指标的权重,利用综合评价值法对电解锰行业污染防治技术进行了评估。在此基础上,利用自底向上模型对评估出的最佳可行技术的污染减排潜力进行预测。结果表明,与基准年2010年相比,2015年电解锰行业废水排放总量可削减270多万吨,氨氮减排6.6×104 t,减排回收的锰和重铬酸钾可分别达到1.9×105 t和3.747×107 t,锰渣减排4×106 t;同时也表明清洁生产技术减排的能力高于末端治理技术减排,清洁生产技术具有较大的推广普及潜力。
Xiaohui Song, Chunlai Jiang, Yu Lei, Yuezhi Zhong, Yanchao Wang
《环境科学与工程前沿(英文)》 2018年 第12卷 第5期 doi: 10.1007/s11783-018-1065-4
We proposed the SO2 and NOx emission performance standards for coal-fired power plants based on the best available control technology. The CFPGUs’ SO2 emission performance reference values should be 0.34 g/kWh for active units in general areas and 0.13 g/kWh for newly built units and active units in key areas. The CFPGUs’ NOx emission performance standard reference values should be 0.35 g/kWh for active units in general areas and 0.175 g/kWh for new units and active units in key areas.
关键词: Coal-fired power-generating units (CFPGU) Emission performance Best available control technology
郝吉明,王金南,王志轩,高翔,高晋生,李凡,姜培学,许嘉钰
《中国工程科学》 2015年 第17卷 第9期 页码 42-48
能源利用与大气污染密切相关,我国以煤为主的能源结构决定了煤炭使用过程中排放的大气污染物是造成我国大气污染的主要原因。本研究在分析我国主要行业煤炭消费现状的基础上,提出了煤炭消费重点行业——电力行业、炼焦行业和工业锅炉及炉窑2020年中期和2030年长期主要大气污染物污染控制技术路线以及煤炭清洁利用的中长期战略要点。
嵇彭
《中国工程科学》 2012年 第14卷 第2期 页码 90-95
在含水复杂的地质条件下采用水平冻结法进行盾构进出洞施工,可以通过延长(加深)水平冻结外圈冻结深度,使冻结加固体全方位包裹并超过盾构机本体,利用外圈冻结孔的维护冻结,将盾构推进过程中形成的微小流水通道中的泥土冻结成为冻土,封闭流水通道,较为有效地防止了流水、涌砂现象的发生。利用长距离水平钻孔防喷接驳器,简单方便地解决了在已施工完毕的端头井内长距离钻孔的难题。工程实践证明,全方位风险控制冻结加固技术在复杂地质条件下盾构进出洞施工中,简单易行,安全可靠,值得推广应用。
标题 作者 时间 类型 操作
Review of fluid and control technology of hydraulic wind turbines
Maolin CAI, Yixuan WANG, Zongxia JIAO, Yan SHI
期刊论文
An adaptive sliding mode control technology for weld seam tracking
Jie LIU,Youmin HU,Bo WU,Kaibo ZHOU,Mingfeng GE
期刊论文
Noise control technology for generator sets in enclosures
ZHANG Nailong, YANG Wentong, FEI Renyuan
期刊论文
FULL TIME-SPACE GOVERNANCE STRATEGY AND TECHNOLOGY FOR CROPLAND NON-POINT POLLUTION CONTROL IN CHINA
期刊论文
The development of pollution control technology in coal combustion in China
XU Xuchang, ZHANG Hu, ZHUO Yuqun, TONG Huiling, WANG Shujuan, LI Yan
期刊论文
Operation and control of flow manufacturing based on constraints management for high-mix/low-volume production
GUAN Zailin, PENG Yunfang, MA Li, ZHANG Chaoyong, LI Peigen
期刊论文
Permitted emissions of major air pollutants from coal-fired power plants in China based on best available controltechnology
Xiaohui Song, Chunlai Jiang, Yu Lei, Yuezhi Zhong, Yanchao Wang
期刊论文