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Dynamic Regulation of Hydrogen Bonding Networks and Solvation Structures for Synergistic Solar‑Thermal Desalination of Seawater and Catalytic Degradation of Organic Pollutants

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Nano-Micro Letters 2025年第2期17卷 548-565页

作者： Ming‑Yuan Yu jing Wu guang Yin Fan‑Zhen Jiao Zhong‑Zhen Yu jin Qu Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China State Key Laboratory of Organic‑Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029People’s Republic of China

Although solar steam generation strategy is efficient in desalinating seawater,it is still challenging to achieve continuous solar-thermal desalination of seawater and catalytic degradation of organic ***,dynamic regulations of hydrogen bonding networks and solvation structures are realized by designing an asymmetric bilayer membrane consisting of a bacterial cellulose/carbon nanotube/Co_(2)(OH)_(2)CO_(3)nanorod top layer and a bacterial cellulose/Co_(2)(OH)_(2)CO_(3)nanorod(BCH)bottom ***,the hydrogen bonding networks inside the membrane can be tuned by the rich surface–OH groups of the bacterial cellulose and Co_(2)(OH)_(2)CO_(3)as well as the ions and radicals in situ generated during the catalysis ***,both SO_(4)^(2−)and HSO_(5)−can regulate the solvation structure of Na^(+)and be adsorbed more preferentially on the evaporation surface than Cl^(−),thus hindering the de-solvation of the solvated Na^(+)and subsequent nucleation/growth of ***,the heat generated by the solar-thermal energy conversion can accelerate the reaction kinetics and enhance the catalytic degradation *** work provides a flow-bed water purification system with an asymmetric solar-thermal and catalytic membrane for synergistic solar thermal desalination of seawater/brine and catalytic degradation of organic pollutants.

关键词： Solar steam generation Seawater desalination Catalytic degradation Bacterial cellulose Cobalt hydroxycarbonate nanorods

Operator-Based Robust Nonlinear Free Vibration Control of a Flexible Plate With Unknown Input Nonlinearity

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IEEE/CAA Journal of Automatica Sinica 2020年第2期7卷 442-450页

作者： guang jin Mingcong Deng Graduate School of Engieering Tokyo University of Agriculture and Technology

In this paper,a robust nonlinear free vibration control design using an operator based robust right coprime factorization approach is considered for a flexible plate with unknown input *** considering the effect of unknown input nonlinearity from the piezoelectric actuator,operator based controllers are designed to guarantee the robust stability of the nonlinear free vibration control ***,for ensuring the desired tracking performance and reducing the effect of unknown input nonlinearity,operator based tracking compensator and estimation structure are given,***,both simulation and experimental results are shown to verify the effectiveness of the proposed control scheme.

关键词： Operator theory piezoelectric actuator robust nonlinear control robust right coprime factorization vibration control

3D analysis for pit evolution and pit-to-crack transition during corrosion fatigue

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第4期14卷 292-299页

作者： Xiao-guang HUANG jin-quan XU Department of Engineering Mechanics China University of Petroleum Department of Engineering Mechanics Shanghai Jiao Tong University

This paper presents a deterministic model to predict the pit evolving morphology and crack initiation life of corrosion *** on the semi-ellipsoidal pit assumption,the thermodynamic potential including elastic energy,surface energy and electrochemical energy of the cyclically stressed solid with an evolving pit is established,from which specific parameters that control the pit evolution are introduced and their influence on the pit evolution are *** critical pit size for crack nucleation is obtained from stress intensity factor criterion and the crack nucleation life is evaluated by Faraday's ***,this paper presents a numerical example to verify the proposed model and investigate the influence of cyclic load on the corrosion fatigue crack nucleation *** corrosion pit appears approximately as a hemisphere in its early formation,and it gradually transits from semicircle to *** strain energy accelerates the morphology evolution of the pit,while the surface energy decelerates *** higher the stress amplitude is,the smaller the critical pit size is and the shorter the crack initiation life is.

关键词： Pit Evolving morphology Thermodynamic potential Critical pit size Crack nucleation

An algorithm of image segmentation for overlapping grain image

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光学精密工程 2005年第5期13卷 592-598页

作者： WANG Zhi jin guang SUN Xiao-wei Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of SciencesChangchun 130033 China Graduate School of Chinese Academy of Sciences Beijing 100039 China

Aiming at measurement of granularity size of nonmetal grain, an algorithm of image segmentation and parameter calculation for microscopic overlapping grain image was studied. This algorithm presents some new attributes of graph sequence from discrete attribute of graph,and consequently achieves the geometrical characteristics from input graph, and the new graph sequence in favor of image segmentation is recombined. The conception that image edge denoted with “twin-point” is put forward, base on geometrical characters of point, image edge is transformed into serial edge, and on recombined serial image edge, based on direction vector definition of line and some additional restricted conditions, the segmentation twin-points are searched with, thus image segmentation is accomplished. Serial image edge is transformed into twin-point pattern, to realize calculation of area and granularity size of nonmetal grain. The inkling and uncertainty on selection of structure element which base on mathematical morphology are avoided in this algorithm, and image segmentation and parameter calculation are realized without changing grain’s self statistical characters.

关键词：图象分割脉冲神经网络人工神经网络模式识别周期性差异

An iterated local coordinate-exchange algorithm for constructing experimental designs for multi-dimensional constrained spaces

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Journal of Systems Engineering and Electronics 2021年第5期32卷 1212-1220页

作者： YOU Yang jin guang PAN Zhengqiang GUO Rui College of Systems Engineering National University of Defense TechnologyChangsha 410073China Institute of Systems Engineering Academy of Military SciencesBeijing 102300China

Iterated local search(ILS)is used to construct the optimal experimental designs for multi-dimensional constrained spaces,in which the inner loop is based on the stochastic coordinate-exchange(SCE)*** time a local optimal solution is found by the SCE algorithm,the perturbation operator is applied to it,and then a new solution is explored in the areas where the exchange of coordinates may produce improvement,so as to retain the features and attributes of the current optimal solution and avoid the defects of random *** implement the iterated local coordinate-exchange algorithm for experimental designs in the multi-dimensional constrained *** addition,sensitivity analysis was conducted to analyze the impacts of the parameters on the performance of the proposed *** we compared the performance of the proposed algorithm to the SCE algorithm using the random restart *** analysis shows that the proposed algorithm is better than the SCE algorithm in terms of efficiency and quality,especially in the experimental designs for high-dimensional constrained space.

关键词： constrained space experimental design coordinate-exchange iterated local search(ILS)

CAUSES AND CONTROL COUNTERMEASURES OF EUTROPHICATION IN CHAOHU LAKE, CHINA

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Chinese Geographical Science 2005年第4期15卷 348-354页

作者： SHANG guang-ping SHANG jin-cheng College of Urban and Environmental Sciences Northeast Normal University Changchun 130024 P. R. China Hefei Environmental Monitoring Center Hefei 230031 P. R. China

Chaohu Lake, located in the central Anhui Province, is one of the five largest fresh lakes in China. Now it is one of the three most eutrophication lakes in China. The deterioration of its water quality has influenced the sustainable development of society, economy and environment of Hefei City, the capital of Anhui Province. A series of measures have been carried out to control its eutrophication, but it is still serious. On the basis of the lake water quality data from 1984 to 2003, the causes of the eutrophication of Chaohu Lake are analyzed. Studies indicated that the suitable natural conditions and human activities played a crucial role in the process of the eutrophication of Chaohu Lake. A great amount of industrial, agricultural and domestic sewage discharged into the lake is the main cause of eutrophication in the lake. Land use, soil erosion and shoreline collapse destroyed the watershed eco-environment and the terrestrial ecosystem of Chaohu Lake. And the building of Yuxi Gate extends the sluggish of the nutritious substance and speeds up the process of the eutrophication. From the view of systematic engineering and watershed ecology, a series of the countermeasures have been put forward to control the eutrophication.

关键词： causes of eutrophication eutrophication control non-engineering measures watershed management Chaohu Lake

Double-port homodyne detection in a squeezed-state interferometry with a binaryoutcome data processing

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Communications in Theoretical Physics 2022年第12期74卷 45-51页

作者： Likun Zhou Pan Liu guang-Ri jin Key Laboratory of Optical Field Manipulation of Zhejiang Province and Physics Department of Zhejiang Sci-Tech University Hangzhou 310018China China Academy of Electronics and Information Technology Beijing 100041China

Performing homodyne detection at a single output port of a squeezed-state light interferometer and then separating the measurement quadrature into two intervals can realize super-resolving and super-sensitive phase measurements,which is equivalent to a binary-outcome ***,the single-port homodyne detection may lose almost part of the phase information,reducing the estimation ***,we propose a data-processing technique over the doubleport homodyne detection,where the two-dimensional measurement quadrature(p1,p2)has been divided into two *** such a binary-outcome measurement,we estimate the phase shift accumulated in the interferometer by inverting the output *** analyzing the full width at half maximum of the signal and the phase sensitivity,we show that both the resolution and the achievable sensitivity are better than that of the previous binary-outcome scheme.

关键词： quantum-enhancement phase estimation squeezed-state light interferometer homodyne detection

A new subregion mesh method for the investigation of the elastic-plastic impact in flexible multibody systems

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Acta Mechanica Sinica 2017年第1期33卷 189-199页

作者： Peng Chen jin-Yang Liu guang-Can Lu Department of Engineering Mechanics School of Naval Architecture Ocean and Civil Engineering Shanghai Jiaotong University Shanghai 200240 China

impact processes between flexible bodies often lead to local stress concentration and wave propagation of high frequency. Therefore, the modeling of flexible multibody systems involving impact should consider the local plastic deformation and the strict requirements of the spatial discretization. Owing to the nonlinearity of the stiffness matrix, the reduction of the element number is extremely important. For the contact-impact problem, since different regions have different requirements regarding the element size, a new subregion mesh method is proposed to reduce the number of the unnecessary elements. A dynamic model for flexible multibody systems with elastic-plastic contact impact is established based on a floating frame of reference formulation and complete Lagrange incremental nonlinear finite-element method to investigate the effect of the elastic-plastic deformation as well as spatial discretization. Experiments on the impact between two bodies are carried out to validate the correctness of the elastic-plastic model. The proposed formulation is applied to a slider-crank system with elastic-plastic impact.

关键词： Multibody dynamics Elastic-plastic impact Subregion mesh method Experiment

improvement of Bonding Strength of Horizontal Twin-Roll Cast Steel/Aluminum Clad Sheet by Electromagnetic Fields

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Acta Metallurgica Sinica(English Letters) 2018年第1期31卷 55-62页

作者： Gang Chen jin-Tao Li guang-Ming Xu Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern University School of Mechanical Materials and Mechatronic Engineering University of Wollongong

Electromagnetic field is an available online method to increase bonding strength of clad sheet manufactured by horizontal twin-roll casting （HTRC）. In this paper, an electric current pulse （ECP） and a complex field （static magnetic field （SMF） together with ECP） are exerted during HTRC of steel/aluminum clad sheet. The produced clad sheet has good appearance, and no visible defects exist at the bonding interface. The inter-diffusion zone at Fe/A1 interface in ECP and SMF＋ECP sheets is 3 and 4 μm, respectively, and the latter increases slightly compared with that in non-field sheet. The average peel strengths （APS） of ECP and SMF＋ECP sheet are 14 and 21 N/mm, respectively, which increase by 2 and 9 N/mm compared with 12 N/mm of non-field sheet. The APS increment in SMF＋ECP sheet is resulted from the increment of interface bonding spots and the enhancement of inter-diffusion zone width.

关键词： Clad sheet Twin-roll casting Electromagnetic field Bonding strength