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Untethered Micro/Nanorobots for Remote Sensing:Toward Intelligent Platform

Nano-Micro Letters 2024年第2期16卷 450-483页

作者： qianqian wang Shihao Yang Li Zhang Jiangsu Key Laboratory for Design and Manufacture of Micro‑Nano Biomedical Instruments School of Mechanical EngineeringSoutheast UniversityNanjing 211189People’s Republic of China Department of Mechanical and Automation Engineering The Chinese University of Hong KongShatinHong Kong 999077People’s Republic of China Chow Yuk Ho Technology Centre for Innovative Medicine The Chinese University of Hong KongShatinHong Kong 999077People’s Republic of China T Stone Robotics Institute The Chinese University of Hong KongShatinHong Kong 999077People’s Republic of China Department of Surgery The Chinese University of Hong KongShatinHong Kong 999077People’s Republic of China

Untethered micro/nanorobots that can wirelessly control their motion and deformation state have gained enormous interest in remote sensing applications due to their unique motion characteristics in various media and diverse *** are developing micro/nanorobots as innovative tools to improve sensing performance and miniaturize sensing systems,enabling in situ detection of substances that traditional sensing methods struggle to *** the past decade of development,significant research progress has been made in designing sensing strategies based on micro/nanorobots,employing various coordinated control and sensing *** review summarizes the latest developments on micro/nanorobots for remote sensing applications by utilizing the self-generated signals of the robots,robot behavior,microrobotic manipulation,and robot-environment *** recent studies and relevant applications in remote sensing,we also discuss the challenges and future perspectives facing micro/nanorobots-based intelligent sensing platforms to achieve sensing in complex environments,translating lab research achievements into widespread real applications.

关键词： Micro/nanorobot Remote sensing Wireless control Self-propulsion Actuation at small scales

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A sparsity adaptive compressed signal reconstruction based on sensing dictionary

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Journal of Systems Engineering and Electronics 2021年第6期32卷 1345-1353页

作者： SHEN Zhiyuan wang qianqian CHENG Xinmiao College of Civil Aviation Nanjing University of Aeronautics and AstronauticsNanjing 210016China Zhejiang Scientific Research Institute of Transport Hangzhou 310023China Civil Aviation Branch Jiangsu Transportation InstituteNanjing 210003China

Signal reconstruction is a significantly important theoretical issue for compressed *** the situation of signal reconstruction with unknown sparsity,the conventional signal reconstruction algorithms usually perform low *** this work,a sparsity adaptive signal reconstruction algorithm using sensing dictionary is proposed to achieve a lower reconstruction *** sparsity estimation method is combined with the construction of the support set based on sensing *** the adaptive sparsity method,an iterative signal reconstruction algorithm is *** sufficient conditions for the exact signal reconstruction of the algorithm also is proved by *** to a series of simulations,the results show that the proposed method has higher precision compared with other state-of-the-art signal reconstruction algorithms especially in a high compression ratio scenarios.

关键词： compressed sensing signal reconstruction adaptive sparsity estimation sensing dictionary

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Geometric meanings of the parameters on rational conic segments

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Science China Mathematics 2005年第9期48卷 1209-1222页

作者： HU qianqian wang Guojin Department of Mathematics Zhejiang University Hangzhou 310027 China State Key Laboratory of CAD&CG Zhejiang University Hangzhou 310027 China

Using algebraic and geometric methods,functional relationships between a point on a conic segment and its corresponding parameter are derived when the conic segment is presented by a rational quadratic or cubic Bézier *** is,the inverse mappings of the mappings represented by the expressions of rational conic segments are *** formulae relate some triangular areas or some angles,determined by the selected point on the curve and the control points of the curve,as well as by the weights of the rational Bézier ***,the relationship can be expressed by the corresponding parametric angles of the selected point and two endpoints on the conic segment,as well as by the weights of the rational Bézier *** results are greatly useful for optimal parametrization,reparametrization,etc.,of rational Bézier curves and surfaces.

关键词： rational Bézier curve, conic segment, ellipse, hyperbola, parabola, parameterization.

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Exploring the potential of olivine-containing copper-nickel slag for carbon dioxide mineralization in cementitious materials

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International Journal of Minerals,Metallurgy and Materials 2024年第3期31卷 562-573页

作者： qianqian wang Zequn Yao Lijie Guo Xiaodong Shen College of Materials Science and Engineering Nanjing Tech UniversityNanjing 211816China State Key Laboratory of Materials-Oriented Chemical Engineering Nanjing 211816China BGRIMM Technology Group Beijing 100160China

Water-quenched copper-nickel metallurgical slag enriched with olivine minerals exhibits promising potential for the production of CO_(2)-mineralized cementitious *** this work,copper-nickel slag-based cementitious material(CNCM)was synthesized by using different chemical activation methods to enhance its hydration reactivity and CO_(2) mineralization *** water curing ages and carbonation conditions were explored related to their carbonation and mechanical properties ***,thermogravimetry differential scanning calorimetry and X-ray diffraction methods were applied to evaluate the CO_(2) adsorption amount and carbonation products of *** development of carbonated CNCM blocks was examined by backscattered electron imaging(BSE)with energy-dispersive X-ray *** showed that among the studied samples,the CNCM sample that was subjected to water curing for 3 d exhibited the highest CO_(2) sequestration amount of 8.51wt%at 80℃and 72 h while presenting the compressive strength of 39.07 *** result indicated that 1 t of this CNCM can sequester 85.1 kg of CO_(2) and exhibit high compressive *** the addition of citric acid did not improve strength development,it was beneficial to increase the CO_(2) diffusion and adsorption amount under the same carbonation conditions from BSE *** work provides guidance for synthesizing CO_(2)-mineralized cementitious materials using large amounts of metallurgical slags containing olivine minerals.

关键词： copper-nickel slag fayalite CO_(2)sequestration cementitious material admixtures carbonation conditions

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On Radon-Penrose transformation and k-Cauchy-Fueter operator

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Science China Mathematics 2012年第9期55卷 1921-1936页

作者： KANG qianqian wang Wei Department of Mathematics Zhejiang University Hangzhou 310027 China

It is known that there is a 1-1 correspondence between the first cohomology of the sheaf O(-k-2) over the projective space and the solutions to the k-Cauchy-Fueter equations on the quaternionic space *** find an explicit Radon-Penrose type integral formula to realize this correspondence:given a -closed(0,1)form f with coefficients in the(-k-2)th power of the hyperplane section bundle H-k-2,there is an integral representation Pf such that ι*(Pf) is a solution to the k-Cauchy-Fueter equations,where ι is an embedding of the quaternionic space Hn into C4n.

关键词： the k-Cauchy-Fueter operator Radon-Penrose integral formula k-regular functions hyperplanesection bundle

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A novel algorithm for explicit optimal multi-degree reduction of triangular surfaces

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Science in China(Series F) 2008年第1期51卷 13-24页

作者： HU qianqian wang GuoJin Institute of Computer Images and Graphics State Key Laboratory of CAD & CG Zhejiang UniversityHangzhou 310027 China

This paper introduces the algebraic property of bivariate orthonormal Jacobi polynomials into geometric approximation. Based on the latest results on the transformation formulae between bivariate Bernstein polynomials and Jacobi polynomials, we naturally deduce a novel algorithm for multi-degree reduction of triangular B^zier surfaces. This algorithm possesses four characteristics： ability of error forecast, explicit expression, less time consumption, and best precision. That is, firstly, whether there exists a multi-degree reduced surface within a prescribed tolerance is judged beforehand; secondly, all the operations of multi-degree reduction are just to multiply the column vector generated by sorting the series of the control points of the original surface in lexicographic order by a matrix; thirdly, this matrix can be computed at one time and stored in an array before processing degree reduction; fourthly, the multi-degree reduced surface achieves an optimal approximation in the norm L2. Some numerical experiments are presented to validate the effectiveness of this algorithm, and to show that the algorithm is applicable to information processing of products in CAD system.

关键词： computer aided design data compression triangular Bezier surface multi-degree reduction Bernstein polynomial,Jacobi polynomial L2 norm

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Enhanced high-temperature strength of HfNbTaTiZrV refractory high-entropy alloy via Al_(2)O_(3)reinforcement

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Journal of Materials Science & Technology 2022年第28期123卷 191-200页

作者： Bingjie wang qianqian wang Nan Lu Xiubing Liang Baolong Shen School of Materials Science and Engineering Jiangsu Key Laboratory for Advanced Metallic MaterialsSoutheast UniversityNanjing 211189China School of Materials Science and Engineering Jiangsu Key Laboratory of Advanced Structural Materials and Application TechnologyNanjing Institute of TechnologyNanjing 211167China Defense Innovation Institute Academy of Military ScienceBeijing 100071China

Novel composites of HfNbTaTiZrV refractory high-entropy alloy(RHEA)reinforced with 0–4 vol.%Al_(2)O_(3)particles have been synthesized by vacuum arc *** microstructure evolution,compressive mechanical properties at room and elevated temperatures,as well as strengthening mechanism of the composites were *** HfNbTaTiZrV RHEA reinforced with 4 vol.%Al_(2)O_(3)displayed excellent phase stability at elevated temperatures.A superior compressive yield strength of 2700 MPa at room temperature,1392 MPa at 800°C,and 693 MPa at 1000°C was obtained for this *** improved yield strength resulted from multiple strengthening mechanisms caused by Al_(2)O_(3)addition,including solution strengthening,interstitial strengthening,grain boundary strengthening,and dispersion ***,the effects of interstitial strengthening increased with temperature and was the main strengthening mechanism at elevated *** findings not only promote the development of oxidereinforced RHEAs for challenging engineering applications but also provide guidelines for the design of light refractory materials with multiple strengthening mechanisms.

关键词： Al_(2)O_(3)-reinforcement HfNbTaTiZrV Refractory high-entropy alloy Interstitial strengthening

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Paleozoic Tectono-Metallogeny in the Tianshan-Altay Region,Central Asia

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Acta Geologica Sinica(English Edition) 2015年第4期89卷 1120-1132页

作者： WAN Tianfeng ZHAO Qingle wang qianqian School of Earth Sciences and Resources China University of Geosciences

The research on Paleozoic tectonics and endogenic metallogeny in the Tianshan-Altay region of Central Asia is an important and significant project. The Altay region, as a collision zone of the Early Paleozoic （500-397 Ma）, and the Tianshan region, as a collision zone of the early period in the Late Paleozoic （Late Devonian-Early Carboniferous, 385-323 Ma）, are all the result of nearly N-S trending shortening and collision （according to recent magnetic orientation）. In the Late Devonian-Early Carboniferous period （385-323 Ma）, regional NW trending faults displayed features of dextral strike-slip motion in the Altay and Junggar regions. In the Tianshan region, nearly EW-trending regional faults are motions of the thrusts. However, in the Late Carboniferous-Early Permian period （323-260 Ma）, influenced by the long-distance effect induced from the Ural collision zone, those areas suffered weaker eastward compression, the existing NW trending faults converted into sinistral strike-slip in the Altay and Junggar regions, and the existing nearly E-W trending faults transferred into dextral strike-slip faults in the Tianshan region. The Rocks of those regions in the Late Carboniferous-Early Permian period （323-260 Ma） were moderately ruptured to a certain tension-shear, and thus formed a number of world famous giant endogenic metal ore deposits in the Tianshan-Altay region. As to the Central Asian continent, the most powerful collision period may not coincide with the most favorable endogenic metallogenic period. It should be treated to ＂the orogenic metallogeny hypothesis＂ with caution in that region.

关键词： tectonics endogenic metallogeny long distance effect Tianshan-Altay region

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A Hierarchical Game Model for Computation Sharing in Smart Buildings

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China Communications 2020年第3期17卷 188-204页

作者： qianqian wang Qin wang Shi Jin Hongbo Zhu Xianbin wang Jiangsu Key Laboratory of Wireless Communications Nanjing University of Posts and TelecommunicationsNanjing 210003China School of Software Engineering Jinling Institute of TechnologyNanjing 211169China Department of Electrical and Computer Engineering Western UniversityLondonON N6A5B9Canada School of Engineering and Computing Sciences New York Institute of TechnologyNew YorkNY 10023USA National Mobile Communications Research Laboratory Southeast UniversityNanjing 210096China

Recently,initiatives to integrate Internet of Things(IoT)technologies into smart buildings have attracted extensive attention for improving the performance of buildings and the comfort of ***,the amount of data generated by IoT devices remains a challenge to the building management systems(BMSs)in terms of intensity and *** from cloud computing and edge computing,we propose a computation sharing architecture in smart buildings to incentivize idle computing devices(ICDs,sellers)to offload computational tasks for the BMS(buyer).In this paper,we design a hierarchical game model,consisting of a Stackelberg game and a Cournot game,to achieve a dynamic increase in computational capacity for the *** guarantee the utility of BMS and ICDs,the Stackelberg game model is built to analyze the interactions between BMS and ***,the Cournot game model is presented to formulate the internal competition among multiple *** the premise of the subgame perfect Nash equilibrium,the BMS can quote the optimal pricing strategy,and the ICDs can share the corresponding optimal amount of computing ***,the simulation results show that the BMS’s computational capacity is enhanced on-demand,and each participant in the game obtains maximal utility.

关键词： computation sharing Stackelberg game Cournot game incomplete information

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Study on the Hydrophobic Property of Shark-Skin-Inspired Micro-Riblets

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Journal of Bionic Engineering 2014年第2期11卷 296-302页

作者： Danyang Zhao qianqian Tian Minjie wang Yifei Jin Key Laboratory for Precision & Non-Traditional Machining Technology of Ministry of Education Dalian University of Technology Dalian 116024 P. R. China

This paper aims to characterize the hydrophobic property of shark-skin-inspired riblets with potential engineering appli- cations. Based on the hydrophobic theory, a new hydrophobic model which is consistent with the special structure of shark-skin-inspired micro-riblets was proposed. Then, the contact angles of different droplets were measured by optical contact angle measuring device on the shark-skin-inspired micro-riblets and the smooth surface, respectively. The results show that the surface of micro-riblets possesses obvious hydrophobicity, and the actual contact angles of different droplets residing on the riblets decrease with the increase in the droplet volume. According to the new hydrophobic model and the measurement of contact angle, it was found that the arrangement and structure of the shark-skin-inspired micro-riblets significantly affect the surface hydrophobic property. Using the new hydrophobic model, the prediction error of contact angle can be less than 3% compared with the measured one. The research on hydrophobic property of biomimetic micro-riblets is proved to be necessary and important to well explain drag reduction and microbe-resistant property of micro-riblets.

关键词： hydrophobic property micro-riblet contact angle shark skin

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