Sticker model is one of the basic models in the DNA computer models.This model is coded with sin-gle-double stranded DNA molecules.It has the following ad-vantages that the operations require no strands extension and ...Sticker model is one of the basic models in the DNA computer models.This model is coded with sin-gle-double stranded DNA molecules.It has the following ad-vantages that the operations require no strands extension and use no enzymes; Whats more, the materials are reusable. Therefore it arouses attention and interest of scientists in many fields. In this paper, we will systematically analyze the theories and applications of the model,summarize other sci-entists contributions in this field,and propose our research results.This paper is the theoretical portion of the sticker model on DNA computer, which includes the introduction of the basic model of sticker computing. Firstly, we systemati-cally introduce the basic theories of classic models about sticker computing; Secondly, we discuss the sticker system which is an abstract computing model based on the sticker model and formal languages; Finally, extend and perfect the model,and present two types of models that are more exten-sive in the applications and more perfect in the theory than the past models: one is the so-called k-bit sticker model,the other is full-message sticker DNA computing model.展开更多
A new method to improve prediction precision of GM（1,1） model with unequal time interval is presented.The grey derivative is multiplied by a parameter to guarantee the time response function satisfying approximately...A new method to improve prediction precision of GM（1,1） model with unequal time interval is presented.The grey derivative is multiplied by a parameter to guarantee the time response function satisfying approximately exponential function distribution.To simplify the process of parametric estimation,an approximate value is taken for the multiplied parameter.Then the estimators of coefficient of development and grey action quantity can be derived.At the same time,the principle of the new information priority is also considered.We take the last item of the first-order accumulated generation operator（1-AGO） on raw data sequence as the initial condition in the time response function.Then the new information can be taken full advantage of through the improved initial condition.Some properties of this new model are also discussed.The presented method is actually a combination of improvement of grey derivative and improvement of the initial condition.The results of an example indicate that the proposed method can improve prediction precision prominently.展开更多
Directed self-assembly has been used to create micro-nano scale patterns,including chiral periodic structures of organic molecules,for potential applications in optics,photonics,metamaterials,and medical and sensing t...Directed self-assembly has been used to create micro-nano scale patterns,including chiral periodic structures of organic molecules,for potential applications in optics,photonics,metamaterials,and medical and sensing technologies.This study presents a straightforward approach for fabricating large-scale chiral grating porphyrin assemblies through template-assisted techniques.The solution of tetrakis(4-sulfonatophenyl)porphyrin(TPPS)was induced by chiral amino acids(L/D-arginine and L/D-serine)to selfassemble into highly ordered chiral grating structures with the assistance of sodium dodecyl sulfate(SDS).The structures show precise line widths(5.5μm)and gaps(18μm).Using in situ optical microscopy and second harmonic generation(SHG)microscopy,the chiral characteristics and dynamic evolution of the template-assisted self-assembly are investigated.It is found that the chirality of amino acids induced TPPS self-assembled into chiral structures and the liquid contraction interface significantly enhanced the chirality of the assemblies.This study is significant for understanding the mechanism of chiral evolution and designing novel micro-nano materials with predetermined chiral properties.展开更多
Molecular programming is applied to minimum spanning problem whose solution requires encoding of real values in DNA strands. A new encoding scheme is proposed for real values that is biologically plausible and has a f...Molecular programming is applied to minimum spanning problem whose solution requires encoding of real values in DNA strands. A new encoding scheme is proposed for real values that is biologically plausible and has a fixed code length. According to the characteristics of the problem, a DNA algorithm solving the minimum spanning tree problem is given. The effectiveness of the proposed method is verified by simulation. The advantages and disadvantages of this algorithm are discussed.展开更多
In traditional ceramic processing techniques,high sintering temperature is necessary to achieve fully dense microstructures.But it can cause various problems including warpage,overfiring,element evaporation,and polymo...In traditional ceramic processing techniques,high sintering temperature is necessary to achieve fully dense microstructures.But it can cause various problems including warpage,overfiring,element evaporation,and polymorphic transformation.To overcome these drawbacks,a novel processing technique called“tcold sintering process(CSP)”has been explored by Randall et al.CSP enables densification of ceramics at ultra-low temperature(<300℃)with the assistance o f transient aqueous solution and applied pressure.In CSP,the processing conditions including aqueous solution,pressure,temperature,and sintering duration play critical roles in the densification and properties of ceramics,which will be reviewed.The review will also include the applications of CSP in solid-state rechargeable batteries.Finally,the perspectives about CSP is proposed.展开更多
Large water pump motor,whose operation decides the reliability of the whole production line,plays a very important role.Therefore,its online condition monitoring can help companies better know its operation,process fa...Large water pump motor,whose operation decides the reliability of the whole production line,plays a very important role.Therefore,its online condition monitoring can help companies better know its operation,process fault analysis and protection.The essay mainly studies and designs large water pump motor′s real time vibration monitoring and fault diagnosis system.The essay completes the systems project design,the establishment of the system and performance test.Eddy-currentsensor,XM-120 vibration module,XM-320 axial translation module,XM-362 temperature module,XM-360 process amount module and XM-500 gateway module are used to measure the axial vibration and displacement of main motors.Laboratory tests prove that the system can meet the requirements of motor vibration monitoring.展开更多
Optical line tweezers have been an efficient tool for the manipulation of large micron particles. In this paper, we propose to create line traps with transformable configurations by using the transverse electromagneti...Optical line tweezers have been an efficient tool for the manipulation of large micron particles. In this paper, we propose to create line traps with transformable configurations by using the transverse electromagnetic mode-like laser source.We designed an optical path to simulate the generation of the astigmatic beams and line traps with a series of lenses to realize the rotational transformation with respect to the rotation angle of cylindrical lenses. It is shown that the spherical particles with diameters ranging from 5 μm to 20 μm could be trapped, aligned, and revolved in experiment. The periodical trapping forces generated by transformable line traps might open an alternative way to investigate the mechanical properties of soft particles and biological cells.展开更多
The finding of the robust ferroelectricity in HfO_(2)-based thin films is fantastic from the view point of both the fundamentals and the applications.In this review article,the current research status of the future pr...The finding of the robust ferroelectricity in HfO_(2)-based thin films is fantastic from the view point of both the fundamentals and the applications.In this review article,the current research status of the future prospects for the ferroelectric HfO_(2)-based thin films and devices are presented from fundamentals to applications.The related issues are discussed,which include:1)The ferroelectric characteristics observed in HfO_(2)-based films and devices associated with the factors of dopant,strain,interface,thickness,defect,fabrication condition,and more;2)physical understanding on the observed ferroelectric behaviors by the density functional theory(DFT)-based theory calculations;3)the characterizations of microscopic and macroscopic features by transmission electron microscopes-based and electrical properties-based techniques;4)modeling and simulations,5)the performance optimizations,and 6)the applications of some ferroelectric-based devices such as ferroelectric random access memory,ferroelectric-based field effect transistors,and the ferroelectric tunnel junction for the novel information processing systems.展开更多
Novel organic-inorganic composites were in-situ synthesized by using TriSilanolPhenyl polyhedral oligomeric silsesquioxane（SO-POSS） as fillers and poly（2,5-benzimidazole）（ABPBI） as polymer matrix. The uniformly ...Novel organic-inorganic composites were in-situ synthesized by using TriSilanolPhenyl polyhedral oligomeric silsesquioxane（SO-POSS） as fillers and poly（2,5-benzimidazole）（ABPBI） as polymer matrix. The uniformly dispersed 3% SO-POSS particles in ABPBI matrix increased the thermal stability of the composite membranes. It was found that both the water and H3PO4 uptakes were increased significantly with the addition of SO-POSS due to the formation of hydrogen bonds between the POSS and H2O/H3PO4, which played a critical role in the improvement of the conductivity of the composite membranes at temperature over 100 ℃. Proton conductivities of H3PO4 doped with 3 wt% SO-POSS contained ABPBI membranes increased with the increase of H3PO4 absorbance, reaching the maximum proton conductivity of 2.55 × 10^-3 S·cm^-1 at 160 ℃, indicating that the ABPBI/SO-POSS composite membrane could be a promising candidate for mid-temperature PEMFCs.展开更多
The lantern-shaped cage Pd_(2)L_(4)and tweezer-like PdL_(2)can be synthesized from the trans-and cis-isomer of an azobenzene-containing ligand,respectively,which were characterized by^(1)H,^(13)C,^(1)H-^(1)H COSY,DOSY...The lantern-shaped cage Pd_(2)L_(4)and tweezer-like PdL_(2)can be synthesized from the trans-and cis-isomer of an azobenzene-containing ligand,respectively,which were characterized by^(1)H,^(13)C,^(1)H-^(1)H COSY,DOSY NMR spectroscopies,high-resolution ESI-MS and density function theory(DFT)calculations.The interconversion of Pd_(2)L_(4)and PdL_(2)can be achieved via the cis-trans isomerization of the azobenzene unit on the ligand upon alternative irradiation of light 365 nm or 420 nm.展开更多
Objective: To evaluate the effects of different surgical procedures on allergic fungal sinusitis. Methods: Thirty-one patients with allergic fungal sinusitis under endoscopic sinus surgery(24 cases) and Caldwell-Luc o...Objective: To evaluate the effects of different surgical procedures on allergic fungal sinusitis. Methods: Thirty-one patients with allergic fungal sinusitis under endoscopic sinus surgery(24 cases) and Caldwell-Luc operation(7 cases) after medical treatment were investigated. Results: No complication was observed during one year's follow-up. No patient who conducted endoscopic sinus surgery reacurred and 3 patients who received traditional surgery required a second operation. Conclusion: This confirmed endoscopic sinus surgery provided a mini-traumatic and effective treatment. Combined treatment of surgical and medical ways was useful to the development of allergic fungal sinusitis.展开更多
We study asymmetric atomic selfish routing in ring networks, which has diverse practical applications in network design and analysis. We are concerned with minimizing the maximum latency of source-destination node-pai...We study asymmetric atomic selfish routing in ring networks, which has diverse practical applications in network design and analysis. We are concerned with minimizing the maximum latency of source-destination node-pairs over links with linear latencies. We show that there exists an optimal solution that is a 9-approximate Nash equilibrium, significantly improving the existing upper bound of 54 on the instability factor. We present fast implementation of the best response dynamics for computing a Nash equilibrium. Furthermore, we perform empirical study on the price of stability, narrowing the gap between the lower and upper bounds to 0.7436.展开更多
This article seeks to analyze the contradictions and recommendations to China＇s insurance industry in the context of low-growth and low interest market. Under the pressure caused by the contradictions between the sus...This article seeks to analyze the contradictions and recommendations to China＇s insurance industry in the context of low-growth and low interest market. Under the pressure caused by the contradictions between the sustainable growth in the insurance premium income and the low ROI, it is very important to solve these contradictions for maintaining a sustainable and steady growth in insurance industry, at the same time, it is also favorable to play a role as a social stabilizer as well as an economic booster for insurance industry. This paper can be divided into four parts： Part I analyzes the five basic characteristics of Chinese low-growth and low-interest insurance industry; part II elaborates the principal contradictions faced by Chinese low-growth and low-interest insurance industry; part III analyzes the development environment of Chinese insurance industry; part IV proposes the recommendations to solve these contradictions.展开更多
This paper presents a new hybrid genetic algorithm for the vertex cover problems in which scan-repair and local improvement techniques are used for local optimization. With the hybrid approach, genetic algorithms are ...This paper presents a new hybrid genetic algorithm for the vertex cover problems in which scan-repair and local improvement techniques are used for local optimization. With the hybrid approach, genetic algorithms are used to perform global exploration in a population, while neighborhood search methods are used to perform local exploitation around the chromosomes. The experimental results indicate that hybrid genetic algorithms can obtain solutions of excellent quality to the problem instances with different sizes. The pure genetic algorithms are outperformed by the neighborhood search heuristics procedures combined with genetic algorithms.展开更多
The consumer demand for emerging technologies such as augmented reality(AR),autopilot,and three-dimensional(3D)internet has rapidly promoted the application of novel optical display devices in innovative industries.Ho...The consumer demand for emerging technologies such as augmented reality(AR),autopilot,and three-dimensional(3D)internet has rapidly promoted the application of novel optical display devices in innovative industries.However,the micro/nanomanufacturing of high-resolution optical display devices is the primary issue restricting their development.The manufacturing technology of micro/nanostructures,methods of display mechanisms,display materials,and mass production of display devices are major technical obstacles.To comprehensively understand the latest state-of-the-art and trigger new technological breakthroughs,this study reviews the recent research progress of master molds produced using nanoimprint technology for new optical devices,particularly AR glasses,new-generation light-emitting diode car lighting,and naked-eye 3D display mechanisms,and their manufacturing techniques of master molds.The focus is on the relationships among the manufacturing process,microstructure,and display of a new optical device.Nanoimprint master molds are reviewed for the manufacturing and application of new optical devices,and the challenges and prospects of the new optical device diffraction grating nanoimprint technology are discussed.展开更多
Electromagnetic metasurface with chaos patterned surface could bring rich interaction modes contributing to fully disordered random motions in deterministic systems, which preform uncertainty, irreducibility and unpre...Electromagnetic metasurface with chaos patterned surface could bring rich interaction modes contributing to fully disordered random motions in deterministic systems, which preform uncertainty, irreducibility and unpredictability. We investigate the influence of the correlation function(CF) properties of surface random patterns on the wave absorption performance. The complicated correlation function provides a fully developed random state, broadening the absorption bandwidth significantly and is helpful for reaching higher absorption rate. With the increasing number of peaks in the correlation function, the absorption band at-15 d B reflectivity widens significantly, band at-20 d B reflectivity begins to emerge. As the first peak’s distance from the original point in the CF is enlarged, the absorption trough is gradually formed and deepened to-35 d B level. The results give in-depth understanding of the relation between absorption behavior and controlling parameters including correlation, image information and foam spacer layer thickness. This high absorption absorber has great application potential in customizable radio communication compatibility device and anechoic testing chamber.展开更多
文摘Sticker model is one of the basic models in the DNA computer models.This model is coded with sin-gle-double stranded DNA molecules.It has the following ad-vantages that the operations require no strands extension and use no enzymes; Whats more, the materials are reusable. Therefore it arouses attention and interest of scientists in many fields. In this paper, we will systematically analyze the theories and applications of the model,summarize other sci-entists contributions in this field,and propose our research results.This paper is the theoretical portion of the sticker model on DNA computer, which includes the introduction of the basic model of sticker computing. Firstly, we systemati-cally introduce the basic theories of classic models about sticker computing; Secondly, we discuss the sticker system which is an abstract computing model based on the sticker model and formal languages; Finally, extend and perfect the model,and present two types of models that are more exten-sive in the applications and more perfect in the theory than the past models: one is the so-called k-bit sticker model,the other is full-message sticker DNA computing model.
基金supported by the National Natural Science Foundation of China (7090103471071077)+2 种基金the National Educational Sciences Planning Key Project of Ministry of Education (DFA090215)the Fundamental Research Funds for the Central Universities (JUSRP21146JUSRP31107)
文摘A new method to improve prediction precision of GM（1,1） model with unequal time interval is presented.The grey derivative is multiplied by a parameter to guarantee the time response function satisfying approximately exponential function distribution.To simplify the process of parametric estimation,an approximate value is taken for the multiplied parameter.Then the estimators of coefficient of development and grey action quantity can be derived.At the same time,the principle of the new information priority is also considered.We take the last item of the first-order accumulated generation operator（1-AGO） on raw data sequence as the initial condition in the time response function.Then the new information can be taken full advantage of through the improved initial condition.Some properties of this new model are also discussed.The presented method is actually a combination of improvement of grey derivative and improvement of the initial condition.The results of an example indicate that the proposed method can improve prediction precision prominently.
基金funding from the National Natural Science Foundation of China(NSFC,Nos.22173112 and 91856121)Chinese Academy of Sciences for support(No.YJKYYQ20180014)。
文摘Directed self-assembly has been used to create micro-nano scale patterns,including chiral periodic structures of organic molecules,for potential applications in optics,photonics,metamaterials,and medical and sensing technologies.This study presents a straightforward approach for fabricating large-scale chiral grating porphyrin assemblies through template-assisted techniques.The solution of tetrakis(4-sulfonatophenyl)porphyrin(TPPS)was induced by chiral amino acids(L/D-arginine and L/D-serine)to selfassemble into highly ordered chiral grating structures with the assistance of sodium dodecyl sulfate(SDS).The structures show precise line widths(5.5μm)and gaps(18μm).Using in situ optical microscopy and second harmonic generation(SHG)microscopy,the chiral characteristics and dynamic evolution of the template-assisted self-assembly are investigated.It is found that the chirality of amino acids induced TPPS self-assembled into chiral structures and the liquid contraction interface significantly enhanced the chirality of the assemblies.This study is significant for understanding the mechanism of chiral evolution and designing novel micro-nano materials with predetermined chiral properties.
文摘Molecular programming is applied to minimum spanning problem whose solution requires encoding of real values in DNA strands. A new encoding scheme is proposed for real values that is biologically plausible and has a fixed code length. According to the characteristics of the problem, a DNA algorithm solving the minimum spanning tree problem is given. The effectiveness of the proposed method is verified by simulation. The advantages and disadvantages of this algorithm are discussed.
文摘In traditional ceramic processing techniques,high sintering temperature is necessary to achieve fully dense microstructures.But it can cause various problems including warpage,overfiring,element evaporation,and polymorphic transformation.To overcome these drawbacks,a novel processing technique called“tcold sintering process(CSP)”has been explored by Randall et al.CSP enables densification of ceramics at ultra-low temperature(<300℃)with the assistance o f transient aqueous solution and applied pressure.In CSP,the processing conditions including aqueous solution,pressure,temperature,and sintering duration play critical roles in the densification and properties of ceramics,which will be reviewed.The review will also include the applications of CSP in solid-state rechargeable batteries.Finally,the perspectives about CSP is proposed.
文摘Large water pump motor,whose operation decides the reliability of the whole production line,plays a very important role.Therefore,its online condition monitoring can help companies better know its operation,process fault analysis and protection.The essay mainly studies and designs large water pump motor′s real time vibration monitoring and fault diagnosis system.The essay completes the systems project design,the establishment of the system and performance test.Eddy-currentsensor,XM-120 vibration module,XM-320 axial translation module,XM-362 temperature module,XM-360 process amount module and XM-500 gateway module are used to measure the axial vibration and displacement of main motors.Laboratory tests prove that the system can meet the requirements of motor vibration monitoring.
基金This work was supported by the National Natural Science Foundation of China(No.61965008)Guangxi Natural Science Foundation(No.AD21220086)+1 种基金Scientific Research Project for Guangxi University(No.2020KY05022)Guangxi Key Laboratory(Nos.YQ21109 and GD21103).
文摘Optical line tweezers have been an efficient tool for the manipulation of large micron particles. In this paper, we propose to create line traps with transformable configurations by using the transverse electromagnetic mode-like laser source.We designed an optical path to simulate the generation of the astigmatic beams and line traps with a series of lenses to realize the rotational transformation with respect to the rotation angle of cylindrical lenses. It is shown that the spherical particles with diameters ranging from 5 μm to 20 μm could be trapped, aligned, and revolved in experiment. The periodical trapping forces generated by transformable line traps might open an alternative way to investigate the mechanical properties of soft particles and biological cells.
基金supported by National Key Research and Development Program(grant 2019YFB2205100)National Science Foundation of China(grant 92064001)。
文摘The finding of the robust ferroelectricity in HfO_(2)-based thin films is fantastic from the view point of both the fundamentals and the applications.In this review article,the current research status of the future prospects for the ferroelectric HfO_(2)-based thin films and devices are presented from fundamentals to applications.The related issues are discussed,which include:1)The ferroelectric characteristics observed in HfO_(2)-based films and devices associated with the factors of dopant,strain,interface,thickness,defect,fabrication condition,and more;2)physical understanding on the observed ferroelectric behaviors by the density functional theory(DFT)-based theory calculations;3)the characterizations of microscopic and macroscopic features by transmission electron microscopes-based and electrical properties-based techniques;4)modeling and simulations,5)the performance optimizations,and 6)the applications of some ferroelectric-based devices such as ferroelectric random access memory,ferroelectric-based field effect transistors,and the ferroelectric tunnel junction for the novel information processing systems.
基金Funded by the Hubei Provincial Key Technology R&D Program(No.[2013]2-3)Science and Technology Department of Hubei Province(No.2013BAA086)the Human Resource and Social Security Ministry for Returned Chinese Scholars(No.[2014]240)
文摘Novel organic-inorganic composites were in-situ synthesized by using TriSilanolPhenyl polyhedral oligomeric silsesquioxane（SO-POSS） as fillers and poly（2,5-benzimidazole）（ABPBI） as polymer matrix. The uniformly dispersed 3% SO-POSS particles in ABPBI matrix increased the thermal stability of the composite membranes. It was found that both the water and H3PO4 uptakes were increased significantly with the addition of SO-POSS due to the formation of hydrogen bonds between the POSS and H2O/H3PO4, which played a critical role in the improvement of the conductivity of the composite membranes at temperature over 100 ℃. Proton conductivities of H3PO4 doped with 3 wt% SO-POSS contained ABPBI membranes increased with the increase of H3PO4 absorbance, reaching the maximum proton conductivity of 2.55 × 10^-3 S·cm^-1 at 160 ℃, indicating that the ABPBI/SO-POSS composite membrane could be a promising candidate for mid-temperature PEMFCs.
基金financially supported by the National Natural Science Foundation of China(No.21572063)Shanghai Municipal Science and Technology Major Project(No.2018SHZDZX03)the Fundamental Research Funds for the Central Universities。
文摘The lantern-shaped cage Pd_(2)L_(4)and tweezer-like PdL_(2)can be synthesized from the trans-and cis-isomer of an azobenzene-containing ligand,respectively,which were characterized by^(1)H,^(13)C,^(1)H-^(1)H COSY,DOSY NMR spectroscopies,high-resolution ESI-MS and density function theory(DFT)calculations.The interconversion of Pd_(2)L_(4)and PdL_(2)can be achieved via the cis-trans isomerization of the azobenzene unit on the ligand upon alternative irradiation of light 365 nm or 420 nm.
文摘Objective: To evaluate the effects of different surgical procedures on allergic fungal sinusitis. Methods: Thirty-one patients with allergic fungal sinusitis under endoscopic sinus surgery(24 cases) and Caldwell-Luc operation(7 cases) after medical treatment were investigated. Results: No complication was observed during one year's follow-up. No patient who conducted endoscopic sinus surgery reacurred and 3 patients who received traditional surgery required a second operation. Conclusion: This confirmed endoscopic sinus surgery provided a mini-traumatic and effective treatment. Combined treatment of surgical and medical ways was useful to the development of allergic fungal sinusitis.
基金Supported in part by China 973 Project(Grant No.2011CB80800)National Natural Science Foundation of China(Grant Nos.10531070,10721101,11222109 and 71101006)CAS Program for Cross & Cooperative Team of Science & Technology Innovation
文摘We study asymmetric atomic selfish routing in ring networks, which has diverse practical applications in network design and analysis. We are concerned with minimizing the maximum latency of source-destination node-pairs over links with linear latencies. We show that there exists an optimal solution that is a 9-approximate Nash equilibrium, significantly improving the existing upper bound of 54 on the instability factor. We present fast implementation of the best response dynamics for computing a Nash equilibrium. Furthermore, we perform empirical study on the price of stability, narrowing the gap between the lower and upper bounds to 0.7436.
文摘This article seeks to analyze the contradictions and recommendations to China＇s insurance industry in the context of low-growth and low interest market. Under the pressure caused by the contradictions between the sustainable growth in the insurance premium income and the low ROI, it is very important to solve these contradictions for maintaining a sustainable and steady growth in insurance industry, at the same time, it is also favorable to play a role as a social stabilizer as well as an economic booster for insurance industry. This paper can be divided into four parts： Part I analyzes the five basic characteristics of Chinese low-growth and low-interest insurance industry; part II elaborates the principal contradictions faced by Chinese low-growth and low-interest insurance industry; part III analyzes the development environment of Chinese insurance industry; part IV proposes the recommendations to solve these contradictions.
基金This project was supported by the National Natural Science Foundation of China the Open Project Foundation of Comput-er Software New Technique National Key Laboratory of Nanjing University.
文摘This paper presents a new hybrid genetic algorithm for the vertex cover problems in which scan-repair and local improvement techniques are used for local optimization. With the hybrid approach, genetic algorithms are used to perform global exploration in a population, while neighborhood search methods are used to perform local exploitation around the chromosomes. The experimental results indicate that hybrid genetic algorithms can obtain solutions of excellent quality to the problem instances with different sizes. The pure genetic algorithms are outperformed by the neighborhood search heuristics procedures combined with genetic algorithms.
基金supported by the Fundamental Key Research Project of Shenzhen(Grant No.JCYJ20210324115806017)the Innovation and Entrepreneurship Project for Overseas High-Level Talents of Shenzhen(Grant No.KQJSCX20180328095603847)+1 种基金the National Natural Science Foundation of China(Grant No.51805331)the National Key R&D Program of China(Grant No.6142005180401).
文摘The consumer demand for emerging technologies such as augmented reality(AR),autopilot,and three-dimensional(3D)internet has rapidly promoted the application of novel optical display devices in innovative industries.However,the micro/nanomanufacturing of high-resolution optical display devices is the primary issue restricting their development.The manufacturing technology of micro/nanostructures,methods of display mechanisms,display materials,and mass production of display devices are major technical obstacles.To comprehensively understand the latest state-of-the-art and trigger new technological breakthroughs,this study reviews the recent research progress of master molds produced using nanoimprint technology for new optical devices,particularly AR glasses,new-generation light-emitting diode car lighting,and naked-eye 3D display mechanisms,and their manufacturing techniques of master molds.The focus is on the relationships among the manufacturing process,microstructure,and display of a new optical device.Nanoimprint master molds are reviewed for the manufacturing and application of new optical devices,and the challenges and prospects of the new optical device diffraction grating nanoimprint technology are discussed.
基金supported by the National Natural Science Foundation of China(Grant Nos.12072031,11872113,and 11702024)。
文摘Electromagnetic metasurface with chaos patterned surface could bring rich interaction modes contributing to fully disordered random motions in deterministic systems, which preform uncertainty, irreducibility and unpredictability. We investigate the influence of the correlation function(CF) properties of surface random patterns on the wave absorption performance. The complicated correlation function provides a fully developed random state, broadening the absorption bandwidth significantly and is helpful for reaching higher absorption rate. With the increasing number of peaks in the correlation function, the absorption band at-15 d B reflectivity widens significantly, band at-20 d B reflectivity begins to emerge. As the first peak’s distance from the original point in the CF is enlarged, the absorption trough is gradually formed and deepened to-35 d B level. The results give in-depth understanding of the relation between absorption behavior and controlling parameters including correlation, image information and foam spacer layer thickness. This high absorption absorber has great application potential in customizable radio communication compatibility device and anechoic testing chamber.
