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Estimation of Hammerstein nonlinear systems with noises using filtering and recursive approaches for industrial control

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Frontiers of Information Technology & Electronic Engineering 2024年第2期25卷 260-271页

作者： Mingguang ZHANG Feng LI yang YU qingfeng CAO School of Electrical&Information Engineering Jiangsu University of TechnologyChangzhou213001China College of Electrical Energy and Power EngineeringYangzhou UniversityYangzhou225127China

This paper discusses a strategy for estimating Hammerstein nonlinear systems in the presence of measurement noises for industrial control by applying filtering and recursive *** proposed Hammerstein nonlinear systems are made up of a neural fuzzy network(NFN)and a linear state`-space *** estimation of parameters for Hammerstein systems can be achieved by employing hybrid signals,which consist of step signals and random ***,based on the characteristic that step signals do not excite static nonlinear systems,that is,the intermediate variable of the Hammerstein system is a step signal with different amplitudes from the input,the unknown intermediate variables can be replaced by inputs,solving the problem of unmeasurable intermediate variable *** the presence of step signals,the parameters of the state-space model are estimated using the recursive extended least squares(RELS)***,to effectively deal with the interference of measurement noises,a data filtering technique is introduced,and the filtering-based RELS is formulated for estimating the NFN by employing random ***,according to the structure of the Hammerstein system,the control system is designed by eliminating the nonlinear block so that the generated system is approximately equivalent to a linear system,and it can then be easily controlled by applying a linear *** effectiveness and feasibility of the developed identification and control strategy are demonstrated using two industrial simulation cases.

关键词： Hammerstein nonlinear systems Neural fuzzy network Data filtering Hybrid signals Industrial control

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SnIP-type atomic-scale inorganic double-helix semiconductors: Synthesis, properties, and applications

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Nano Research 2024年第3期17卷 2111-2128页

作者： Mudussar Ali Bowen Zhang Muhammad Khurram qingfeng Yan Engineering Research Center of Advanced Rare Earth Materials(Ministry of Education) Department of ChemistryTsinghua UniversityBeijing 100084China

Flexible inorganic double helical semiconductors similar to DNA have fueled the demand for efficient materials with innovative structures and excellent *** recent discovery of tin phosphide iodide(SnIP),the first carbon-free double helical semiconductor at an atomic level,has opened new avenues of research for semiconducting devices such as thermoelectric and sensor devices,solar cells,and *** has drawn significant academic attention due to its high structural flexibility,band gap in the visible spectrum range,and non-toxic ***,the recent progress in developing SnIP,including its prestigious structure,versatile and intriguing properties,and synthesis,is *** analogues of SnIP and SnIP-based hybrid materials and their applications in photocatalysis are also ***,the review concludes with a critical summary and future aspects of this new inorganic semiconductor.

关键词： tin phosphide iodide(SnIP) inorganic semiconductor inorganic double helix SnIP-based hybrids photocatalysis flexible material

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Revolution in thermoelectric cooling using PbSe thermoelectrics by grid plainification

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Science China Materials 2024年第5期67卷 1672-1673页

作者： Xiao-Lei Shi qingfeng Liu Zhi-Gang Chen School of Chemistry and Physics ARC Research Hub in Zero-emission Power Generation for Carbon Neutralityand Centre for Materials ScienceQueensland University of TechnologyBrisbaneQueensland4000Australia State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing211816China

Thermoelectric materials and devices enable direct conversion between heat and electricity,holding potential applications in thermoelectric power generation,localized cooling,and electronic thermal management[1].Howev... 详细信息

关键词： enable thermoelectric constrained

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Environmental emigration stress of slope farmland in the Three Gorges area

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Journal of Geographical Sciences 2002年第4期12卷 420-426页

作者： WANG Liming, GUAN qingfeng, yang Yanfeng(Inst. of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China) Inst. of Geographic Sciences and Natural Resources Research CAS 北京 100101

The project of ‘grain for green’, to restore woodland and grass by retreating from slope farmland, as a fundamental measure of eco-environmental rehabilitation, is being conducted in the reservoir area of the Three Gorges gradually. However, the de-farming of slope farmland will reduce the amount of farmland in de-farmed areas, especially in the areas with concentrated slope farmland, which would cause the problems of environmental emigration. The people who cannot regain enough farmland by relocating farmlands within village after de-farming and have to emigrate to other places are called environmental emigrants or ecological emigrants. In the research, a de-farming stress index model and an environmental emigration model are developed based on GRID data, and the potential amount of environmental emigration caused by de-farming of slope farmland in the reservoir area is simulated aided with GIS. The simulation indicates that the potential emigration amount caused by de-farming is quite large. When the de-farming stress index reaches 40%, the amount is as large as 890,000 people, which is equivalent to the emigrants caused by the submergence of the Three Gorges reservoir. So it should be considered as a big problem during the eco-environmental rehabilitation in this area. Some suggestions are raised to tackle the problem. Firstly, the emigration plan should be included in the de-farming plan. Secondly, some provinces, especially those located in the lower reaches of the yangtze River, should accommodate part of the environmental emigrants.

关键词： environmental emigration slope farmland de-farming Three Gorges

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Rational Design of Plasmonic Nanoparticle-Molecule Complexes for Chirality Sensing

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Chinese Journal of Chemistry 2024年第8期42卷 903-919页

作者： Chen Wang Dandan Lu Lichao Sun qingfeng Zhang College of Chemistry and Molecular Sciences Wuhan UniversityWuhanHubei430072 China

Comprehensive Summary,Sensing the chirality of molecules is of great importance to fields such as enantioselective synthesis,pharmaceutical industry,and *** nanoparticles are ideal candidates for molecular sensing due to their inherent plasmonic properties that significantly enhance their sensitivity to surrounding *** plasmonic nanoparticle-molecule complexes for chirality sensing has drawn enormous attention in recent years due to their intriguing properties and potential ***,in this review,we believe it is timely to circumnavigate the rational design of plasmonic nanoparticle-molecule complexes and widen the scope of their emerging applications in chirality ***,we present different fundamental mechanisms for plasmon-based chirality that are built on the system of plasmonic nanoparticle-molecule ***,we review the typical applications of plasmonic nanoparticle-molecule complexes in chirality ***,we discuss the emerging biomedical applications that the plasmon-based chirality has attracted enormous ***,we provide an outlook on the challenges and opportunities in the field of plasmonic approaches for chirality sensing.

关键词： Chirality Surface plasmon resonance Nanoparticles Chiral molecules Chirality sensing

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Sequentially bridged MXene platelets for strong high‐temperature EM‐IR bi‐stealth sheets

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SmartMat 2024年第1期5卷 121-134页

作者： Yushan yang Kaicong Chen Yipeng Chen Chao Wang Baokang Dang Yingying Li Ming Liu qingfeng Sun College of Chemistry and Materials Engineering Zhejiang A&F UniversityHangzhouChina Guangxi Fenglin Wood Industry Group Co.Ltd NanningChina

Combination of flexible multifunctional stealth technology properties such as electromagnetic(EM)and infrared(IR)stealth is crucial to the development of aerospace,military,and electronic fields,but the synthesis technology still has a significant ***,we have successfully designed and synthesized highly flexible MXene@cellulose lamellae/borate ion(MXCB)sheets with strong high‐temperature EM‐IR bi‐stealth through sequential bridging of hydrogen and covalent *** resultant MXCB sheets display high conductivity and good mechanical features such as flexibility,stretchability,fatigue resistance,and ultrasonic *** sheets have a high tensile strength of 795 ***,MXCB sheets with different thicknesses indicate exceptional high‐temperature thermal‐camouflage *** reduces the radiation temperature of the target object(>300°C)to 100°*** conductivity of MXCB sheet with 3μm thickness is 6108 S/cm and the EM interference(EMI)shielding value is 39.74 *** normalized surface‐specific EMI SE absolute shielding effectiveness(SSE/t)is as high as 39312.78 dB·cm2/g,which remained 99.39%even after 10,000 times repeated *** multifunctional ultrathin MXCB sheets can be arranged by vacuum‐assisted induction to develop EM‐IR bi‐stealth sheet.

关键词： cellulose lamellae EM‐IR bi‐stealth mechanically strong MXene platelets transition metal carbides

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INTERFACIAL PHENOMENA AT BOUNDARIES OF MOLTEN ELECTROLYTE-CARBON ELECTRODE-LIQUID METAL IN ALUMINIUM ELECTROLYSIS CELL(PARTⅠ)

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中国有色金属学会会刊：英文版 1997年第3期7卷 128-132页

作者： Qiu Zhuxian, Yu Yaxin, He Minghong, Li qingfeng, yang Zhenhai Department of Nonferrous Metal Metallurgy, Northeastern University, Shenyang 110006

ＩＮＴＥＲＦＡＣＩＡＬＰＨＥＮＯＭＥＮＡＡＴＢＯＵＮＤＡＲＩＥＳＯＦＭＯＬＴＥＮＥＬＥＣＴＲＯＬＹＴＥＣＡＲＢＯＮＥＬＥＣＴＲＯＤＥＬＩＱＵＩＤＭＥＴＡＬＩＮＡＬＵＭＩＮＩＵＭＥＬＥＣＴＲＯＬＹＳＩＳＣＥＬＬ（Ｐ... 详细信息

ＩＮＴＥＲＦＡＣＩＡＬＰＨＥＮＯＭＥＮＡＡＴＢＯＵＮＤＡＲＩＥＳＯＦＭＯＬＴＥＮＥＬＥＣＴＲＯＬＹＴＥＣＡＲＢＯＮＥＬＥＣＴＲＯＤＥＬＩＱＵＩＤＭＥＴＡＬＩＮＡＬＵＭＩＮＩＵＭＥＬＥＣＴＲＯＬＹＳＩＳＣＥＬＬ（ＰＡＲＴⅠ）①ＱｉｕＺｈｕｘｉａｎ，...

关键词： aluminium electrolysis molten electrolyte carbon electrodes

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旋转磁场与水量耦合对CaCO_3结晶的影响

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化工学报 2018年第7期69卷 3029-3037页

作者：罗志强杨庆峰中国科学院上海高等研究院绿色化学工程技术研究中心上海201210 中国科学院大学化学与化工学院北京100043

随着环保问题越来越得到重视,无化学药剂添加的阻垢方法也愈加引起研究者的关注。磁处理被一些研究者认为是一种无污染、低成本的物理防垢方法,但其在工业应用中的有效性和作用机制仍存在很大争议。以碳酸钙结晶体系为研究对象,新设计... 详细信息

随着环保问题越来越得到重视,无化学药剂添加的阻垢方法也愈加引起研究者的关注。磁处理被一些研究者认为是一种无污染、低成本的物理防垢方法,但其在工业应用中的有效性和作用机制仍存在很大争议。以碳酸钙结晶体系为研究对象,新设计了磁场作用范围宽窄两种形式的磁处理装置,着重考察了与工业应用密切相关的处理水量与磁处理效果间的耦合关系。结果表明,当处理水量较小时,磁处理可促进碳酸钙的均相成核,使生成的晶体粒径变小数量增多,总沉积量增大,并且磁处理效果在一定转速范围内随旋转磁场转速的增加而增强。此外发现,旋转磁场与水量有明显的耦合关系:当磁处理条件不变而处理水量增大时,磁处理效果就会减弱;当处理水量一定而强化磁处理条件时,磁处理效果就会增强。先磁处理一部分溶液再逐步添加溶液进行的分步磁处理实验表明,该法可提高大水量条件下碳酸钙的去除率,使磁处理效果更为明显,同时表明了处理水量与磁场相匹配耦合的重要性。

关键词：旋转磁场成核结晶结垢脱盐耦合关系

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回到记忆现象本身：后现象学的错失之谜

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浙江学刊 2020年第2期 34-41页

作者：杨庆峰复旦大学哲学学院复旦大学应用伦理研究中心复旦发展研究院

基于跨学科的哲学方法,唐·伊德通过对利科现象学的合理解读成功地建立了后现象学流派,这一解读的合理性不仅体现在准确地抓住了利科解释学中的方法特征,而且也给后来他自身的物质化转向提供了哲学根据;但是这种解读也错失了对记忆现象... 详细信息

基于跨学科的哲学方法,唐·伊德通过对利科现象学的合理解读成功地建立了后现象学流派,这一解读的合理性不仅体现在准确地抓住了利科解释学中的方法特征,而且也给后来他自身的物质化转向提供了哲学根据;但是这种解读也错失了对记忆现象的阐述。这种错失的内在原因是知觉优先性的预设导致的结果,其外在原因是对技术体验和科学解释等问题的关注。此外,这个错失是必然性的错失。利科本人也经历了忽略记忆和重视记忆的过程,在保罗·利科那里,记忆是作为抵抗理性反思傲慢的武器存在,呈现了遗忘在人类历史中的作用。通过发现伊德的错失可以让技术现象学获得与经典现象学进行有效融合、构建记忆现象学谱系以及获得应对构建人工智能哲学不可缺少的基础概念。

关键词：唐·伊德记忆技术现象学

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剥离环境因素的中国区域高技术产业技术效率再估计——基于三阶段DEA模型的研究

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产业经济研究 2014年第4期 94-102页

作者：杨青峰南京航空航天大学经济与管理学院江苏南京211106

本文以我国高技术产业分地区数据为样本,应用三阶段DEA模型,对高技术产业技术效率进行了重新估计。研究发现,在剥离了地区对外开放程度、地区经济发展水平、地区人力资本水平及地区产业结构等外部因素的基础上,中国高技术产业技术效率... 详细信息

本文以我国高技术产业分地区数据为样本,应用三阶段DEA模型,对高技术产业技术效率进行了重新估计。研究发现,在剥离了地区对外开放程度、地区经济发展水平、地区人力资本水平及地区产业结构等外部因素的基础上,中国高技术产业技术效率整体均值只有0.381,低于调整前的整体均值0.688,尚有超过60%的提升空间,且规模效率不高是制约其整体提升的主要因素。本文结论可以更加客观的认识中国高技术产业的真实效率,对于提升中国高技术产业技术效率具有重要意义。

关键词：高技术产业技术效率三阶段DEA

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