目的唐卡作为人类非物质文化遗产热贡艺术的重要表现形式之一,承载着重要的历史文化价值。在实地采集过程中发现,由于保存条件有限,许多唐卡作品出现裂痕、破损、水渍及霉点等问题,传统手工的修复方式效率低,且存在导致唐卡二次受损的...目的唐卡作为人类非物质文化遗产热贡艺术的重要表现形式之一,承载着重要的历史文化价值。在实地采集过程中发现,由于保存条件有限,许多唐卡作品出现裂痕、破损、水渍及霉点等问题,传统手工的修复方式效率低,且存在导致唐卡二次受损的风险。此外,使用传统图像修复方法和基于深度学习的图像自动修复方法修复唐卡时,往往产生不符合唐卡纹理结构的结果。鉴于此,提出一种线稿引导的交互式唐卡图像修复网络LSFNet(an image restoration network that combines line restoration,style and texture restoration,and fine restoration)。方法该方法由3部分组成,首先是唐卡艺术家指导的交互式线稿修复,使得修复的线结构更加接近真实唐卡图像;其次是风格纹理修复阶段,通过构建空间风格纹理模块学习唐卡图像整体风格和特征,并结合通道注意力和全连接层,捕获全局信息并进行融合,获得初步修复特征;最后是精修复阶段,引入线性注意力模块,实现全局信息传递,增强模型对唐卡图像内容的理解能力。结果以在青海采集的唐卡图像为基础,创建了唐卡修复数据集,并通过模拟破损区域,制作了掩码数据集,在创建的数据集上进行训练测试。与DeepFillv2、EdgeConnect、DFNet(deep fusion network)、HiFill及T-Former等图像修复方法进行定量、定性和主观实验对比分析。结果表明,该方法有良好的修复效果,在唐卡数据集上的PSNR(peak signal to noise ratio)、SSIM(structural similarity)和LPIPS(learned perceptual image patch similarity)3个评价指标结果均优于对比方法。与性能第2的模型相比,PSNR和SSIM分别提高10.55%和1.8%,LPIPS降低57.98%。此外,消融实验进一步验证了交互式线稿修复、风格纹理修复和精修复3个模块的有效性。结论通过采用交互式线稿修补的方法,能够有效地对破损唐卡图像进行修复,获得符合唐卡内容风格的修复结果。展开更多
In this paper,we prove that there exists a unique local solution for the Cauchy problem of a system of the incompressible Navier-Stokes-Landau-Lifshitz equations with the Dzyaloshinskii-Moriya interaction and V-flow t...In this paper,we prove that there exists a unique local solution for the Cauchy problem of a system of the incompressible Navier-Stokes-Landau-Lifshitz equations with the Dzyaloshinskii-Moriya interaction and V-flow term inR^(2) and R^(3).Our methods rely upon approximating the system with a perturbed parabolic system and parallel transport.展开更多
According to the question of how to transfer data between Pro/E and ADAMS correctly, the paper gives an improved importing solution, which combines the interface and the Standard Data Format（SDF） files. It settles t...According to the question of how to transfer data between Pro/E and ADAMS correctly, the paper gives an improved importing solution, which combines the interface and the Standard Data Format（SDF） files. It settles the problems caused by improper geometry during the import conducted by the interface software. With the solution ,fea- ture points can be conveniently picked to build kinematic constraints are the preparation of the model will be simpli- fied. An example is given for the method, and corresponding simulations are conducted. The results of the simula- tions verify the validity of the solution.展开更多
Based on the fundamental equations of piezoelasticity of quasicrystal material,we investigated the interaction between a screw dislocation and a wedge-shaped crack in the piezoelectricity of one-dimensional hexagonal ...Based on the fundamental equations of piezoelasticity of quasicrystal material,we investigated the interaction between a screw dislocation and a wedge-shaped crack in the piezoelectricity of one-dimensional hexagonal quasicrystals.Explicit analytical solutions are obtained for stress and electric displacement intensity factors of the crack,as well as the force on dislocation.The derivation is based on the conformal mapping method and the perturbation technique.The influences of the wedge angle and dislocation location on the image force are also discussed.The results obtained in this paper can be fully reduced to some special cases already available or deriving new ones.展开更多
In this paper, the instability boundaries of an axially moving viscoelastic beam due to parametric resonance are revisited for the internal resonance case. The relation between the time-dependent tension and the time-...In this paper, the instability boundaries of an axially moving viscoelastic beam due to parametric resonance are revisited for the internal resonance case. The relation between the time-dependent tension and the time-dependent axial speed is constructed, which provides a new model in the study of axially moving material with pulsation parameters. The instability boundaries caused by the combination of parametric and internal resonances are studied using the method of multiple time scales. Some strange instability boundaries are detected when the internal resonance is considered. The phenomenon of local zigzag boundary contour is explained from the viewpoint of modal interactions.展开更多
We analyze the electromagnetic interaction between local surface plasmon polaritons （SPPs） and an atmospheric surface wave plasma jet （ASWPJ） in combination with our designed discharge device. Before discharge, th...We analyze the electromagnetic interaction between local surface plasmon polaritons （SPPs） and an atmospheric surface wave plasma jet （ASWPJ） in combination with our designed discharge device. Before discharge, the excitation of the SPPs and the spatial distribution of the enhanced electric field are analyzed. During discharge, the critical breakdown electric field of the gases at atmospheric gas pressure and the surface wave of the SPPs converted into electron plasma waves at resonant points are studied. After discharge, the ionization development process of the ASWPJ is simulated using a two- dimensional fluid model. Our results suggest that the local enhanced electric field of SPPs is merely the precondition of gas breakdown, and the key mechanism in maintaining the discharge development of a low-power ASWPJ is the wave-mode conversion of the local enhanced electric field at the resonant point.展开更多
Wrinkling analysis of a rectangular membrane with a single crease under shearing is performed to understand the wrinkle-crease interaction behaviors. The crease is considered by introducing the residual stresses from ...Wrinkling analysis of a rectangular membrane with a single crease under shearing is performed to understand the wrinkle-crease interaction behaviors. The crease is considered by introducing the residual stresses from creasing and the effective modulus into the baseline configuration with assumed circular cross-sectional crease geometry. The wrinkling analysis of the creased membrane is then performed by using the direct perturb-force （DP） simulation technique which is based on our modified displacement components （MDC） method. Results reveal that the crease may influence the stress transfer path in the membrane and further change the wrinkling direction. The crease appears to improve the bending stiffness of the membrane which has an effective resistance on the wrinkling evolution. The effects of the crease orientation on wrinkle-crease interaction are studied toward the end of this paper. The results show that the wrinkling amplitude, wavelength, and direction increase as the crease orientation increases, and the wrinkling number decreases with the increasing crease orientation. These results will be of great benefit to the analysis and the control of the wrinkles in the membrane structures.展开更多
Investigation of charge-transfer （CT） complexes of drugs has been recognized as an important phenomenon in understanding of the drug-receptor binding mechanism. Structural, thermal, morpholo-gical and biological beh...Investigation of charge-transfer （CT） complexes of drugs has been recognized as an important phenomenon in understanding of the drug-receptor binding mechanism. Structural, thermal, morpholo-gical and biological behavior of CT complexes formed between drug quinidine （Qui） as a donor and quinol （QL）, picric acid （PA） or dichlorodicyanobenzoquinone （DDQ） as acceptors were reported. The newly synthesized CT complexes have been spectroscopically characterized via elemental analysis;infrared （IR）, Raman, 1H NMR and electronic absorption spectroscopy; powder X-ray diffraction （PXRD）;thermogravimetric （TG） analysis and scanning electron microscopy （SEM）. It was found that the obtained complexes are nanoscale, semi-crystalline particles, thermally stable and spontaneous. The molecular composition of the obtained complexes was determined using spectrophotometric titration method and was found to be 1：1 ratios （donor：acceptor）. Finally, the biological activities of the obtained CT complexes were tested for their antibacterial activities. The results obtained herein are satisfactory for estimation of drug Qui in the pharmaceutical form展开更多
Effects of Si^3＋ and H＋ irradiation on tungsten were investigated by internal friction （IF） technique. Scanning electron microscope （SEM） analysis revealed that sequential dual Si＋H irradiation resulted in more...Effects of Si^3＋ and H＋ irradiation on tungsten were investigated by internal friction （IF） technique. Scanning electron microscope （SEM） analysis revealed that sequential dual Si＋H irradiation resulted in more serious damage than single Si irradiation. After irradiation, the IF background was significantly enhanced. Besides, two obvious IF peaks were initially found in tem- perature range of 70～330 K in the sequential Si＋H irradiated tungsten sample. The mechanism of increased IF background for the irradiated samples was suggested to originate from the high density dislocations induced by ion irradiation. On the other hand, the relaxation peak PL and non-relaxation peak PH in the Si＋H irradiated sample were ascribed to the interaction process of hydrogen atoms with mobile dislocations and transient processes of hydrogen redistribution, respectively. The obtained experimental results verified the high sensitivity of IF method on the irradiation damage behaviors in nuclear materials.展开更多
Surface functionalization of sensor chip for probe immobilization is crucial for the biosensing applications of surface plasmon resonance(SPR)sensors.In this paper,we report a method circulating the dopamine aqueous s...Surface functionalization of sensor chip for probe immobilization is crucial for the biosensing applications of surface plasmon resonance(SPR)sensors.In this paper,we report a method circulating the dopamine aqueous solution to coat polydopamine film on sensing surface for surface functionalization of SPR chip.The polydopamine film with available thickness can be easily prepared by controlling the circulation time and the biorecognition elements can be immobilized on the polydopamine film for specific molecular interaction analysis.These opera-tions are all performed under flow condition in the fuidic system,and have the advantages of easy implementation,less time consuming,and low cost,because the reagents and devices used in the operations are routinely applied in most laboratories.In this study,the specific absorption between the protein A probe immobilized on the sensing surface and human immunoglobulin G in the buffer is monitored based on this surface functionalization strategy to demonstrated its feasibility for SPR biosensing applications.展开更多
文摘目的唐卡作为人类非物质文化遗产热贡艺术的重要表现形式之一,承载着重要的历史文化价值。在实地采集过程中发现,由于保存条件有限,许多唐卡作品出现裂痕、破损、水渍及霉点等问题,传统手工的修复方式效率低,且存在导致唐卡二次受损的风险。此外,使用传统图像修复方法和基于深度学习的图像自动修复方法修复唐卡时,往往产生不符合唐卡纹理结构的结果。鉴于此,提出一种线稿引导的交互式唐卡图像修复网络LSFNet(an image restoration network that combines line restoration,style and texture restoration,and fine restoration)。方法该方法由3部分组成,首先是唐卡艺术家指导的交互式线稿修复,使得修复的线结构更加接近真实唐卡图像;其次是风格纹理修复阶段,通过构建空间风格纹理模块学习唐卡图像整体风格和特征,并结合通道注意力和全连接层,捕获全局信息并进行融合,获得初步修复特征;最后是精修复阶段,引入线性注意力模块,实现全局信息传递,增强模型对唐卡图像内容的理解能力。结果以在青海采集的唐卡图像为基础,创建了唐卡修复数据集,并通过模拟破损区域,制作了掩码数据集,在创建的数据集上进行训练测试。与DeepFillv2、EdgeConnect、DFNet(deep fusion network)、HiFill及T-Former等图像修复方法进行定量、定性和主观实验对比分析。结果表明,该方法有良好的修复效果,在唐卡数据集上的PSNR(peak signal to noise ratio)、SSIM(structural similarity)和LPIPS(learned perceptual image patch similarity)3个评价指标结果均优于对比方法。与性能第2的模型相比,PSNR和SSIM分别提高10.55%和1.8%,LPIPS降低57.98%。此外,消融实验进一步验证了交互式线稿修复、风格纹理修复和精修复3个模块的有效性。结论通过采用交互式线稿修补的方法,能够有效地对破损唐卡图像进行修复,获得符合唐卡内容风格的修复结果。
文摘In this paper,we prove that there exists a unique local solution for the Cauchy problem of a system of the incompressible Navier-Stokes-Landau-Lifshitz equations with the Dzyaloshinskii-Moriya interaction and V-flow term inR^(2) and R^(3).Our methods rely upon approximating the system with a perturbed parabolic system and parallel transport.
文摘According to the question of how to transfer data between Pro/E and ADAMS correctly, the paper gives an improved importing solution, which combines the interface and the Standard Data Format（SDF） files. It settles the problems caused by improper geometry during the import conducted by the interface software. With the solution ,fea- ture points can be conveniently picked to build kinematic constraints are the preparation of the model will be simpli- fied. An example is given for the method, and corresponding simulations are conducted. The results of the simula- tions verify the validity of the solution.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11262017,11262012,and 11462020)the Natural Science Foundation of Inner Mongolia Autonomous Region,China(Grant No.2015MS0129)+1 种基金the Programme of Higher-level Talents of Inner Mongolia Normal University(Grant No.RCPY-2-2012-K-035)the Key Project of Inner Mongolia Normal University(Grant No.2014ZD03)
文摘Based on the fundamental equations of piezoelasticity of quasicrystal material,we investigated the interaction between a screw dislocation and a wedge-shaped crack in the piezoelectricity of one-dimensional hexagonal quasicrystals.Explicit analytical solutions are obtained for stress and electric displacement intensity factors of the crack,as well as the force on dislocation.The derivation is based on the conformal mapping method and the perturbation technique.The influences of the wedge angle and dislocation location on the image force are also discussed.The results obtained in this paper can be fully reduced to some special cases already available or deriving new ones.
基金This work was supported by the National Natural Science Foundation of China （Project No. 11672186, 11672007, 11502147, 11602146）, the Chen Guang Project supported by Shanghai Municipal Education Commission and Shanghai Education Development Foundation （No. 14CG57）, the training scheme for the Youth Teachers of Higher Education of Shanghai （No. ZZyyy12035）, and the Alliance Program （No.LM201663）.
文摘In this paper, the instability boundaries of an axially moving viscoelastic beam due to parametric resonance are revisited for the internal resonance case. The relation between the time-dependent tension and the time-dependent axial speed is constructed, which provides a new model in the study of axially moving material with pulsation parameters. The instability boundaries caused by the combination of parametric and internal resonances are studied using the method of multiple time scales. Some strange instability boundaries are detected when the internal resonance is considered. The phenomenon of local zigzag boundary contour is explained from the viewpoint of modal interactions.
基金Project supported by the National Natural Science Foundation of China(Grant No.11105002)the Open-end Fund of State Key Laboratory of Structural Analysis for Industrial Equipment,China(Grant No.GZ1215)+1 种基金the Natural Science Foundation for University in Anhui Province of China(Grant No.KJ2013A106)the Doctoral Scientific Research Funds of Anhui University of Science and Technology,China
文摘We analyze the electromagnetic interaction between local surface plasmon polaritons （SPPs） and an atmospheric surface wave plasma jet （ASWPJ） in combination with our designed discharge device. Before discharge, the excitation of the SPPs and the spatial distribution of the enhanced electric field are analyzed. During discharge, the critical breakdown electric field of the gases at atmospheric gas pressure and the surface wave of the SPPs converted into electron plasma waves at resonant points are studied. After discharge, the ionization development process of the ASWPJ is simulated using a two- dimensional fluid model. Our results suggest that the local enhanced electric field of SPPs is merely the precondition of gas breakdown, and the key mechanism in maintaining the discharge development of a low-power ASWPJ is the wave-mode conversion of the local enhanced electric field at the resonant point.
基金supported by the National Natural Science Foundation of China (10902027)the Specialized Research Fund for the Doctoral Program of Higher Education of China (200802131046)+1 种基金Aeronautical Science Foundation of China (2010ZA77001)the Fundamental Research Funds for the Central Universities(HIT.NSRIF.201156)
文摘Wrinkling analysis of a rectangular membrane with a single crease under shearing is performed to understand the wrinkle-crease interaction behaviors. The crease is considered by introducing the residual stresses from creasing and the effective modulus into the baseline configuration with assumed circular cross-sectional crease geometry. The wrinkling analysis of the creased membrane is then performed by using the direct perturb-force （DP） simulation technique which is based on our modified displacement components （MDC） method. Results reveal that the crease may influence the stress transfer path in the membrane and further change the wrinkling direction. The crease appears to improve the bending stiffness of the membrane which has an effective resistance on the wrinkling evolution. The effects of the crease orientation on wrinkle-crease interaction are studied toward the end of this paper. The results show that the wrinkling amplitude, wavelength, and direction increase as the crease orientation increases, and the wrinkling number decreases with the increasing crease orientation. These results will be of great benefit to the analysis and the control of the wrinkles in the membrane structures.
文摘Investigation of charge-transfer （CT） complexes of drugs has been recognized as an important phenomenon in understanding of the drug-receptor binding mechanism. Structural, thermal, morpholo-gical and biological behavior of CT complexes formed between drug quinidine （Qui） as a donor and quinol （QL）, picric acid （PA） or dichlorodicyanobenzoquinone （DDQ） as acceptors were reported. The newly synthesized CT complexes have been spectroscopically characterized via elemental analysis;infrared （IR）, Raman, 1H NMR and electronic absorption spectroscopy; powder X-ray diffraction （PXRD）;thermogravimetric （TG） analysis and scanning electron microscopy （SEM）. It was found that the obtained complexes are nanoscale, semi-crystalline particles, thermally stable and spontaneous. The molecular composition of the obtained complexes was determined using spectrophotometric titration method and was found to be 1：1 ratios （donor：acceptor）. Finally, the biological activities of the obtained CT complexes were tested for their antibacterial activities. The results obtained herein are satisfactory for estimation of drug Qui in the pharmaceutical form
基金supported by National Natural Science Foundation of China （Nos. 11075177, 11175203, 91126002） and Strategic Priority Research Program of Chinese Academy of Sciences （Nos. KJCX2-YW-N35, XDA03010303） and the National Magnetic Confinement Pusion Program of China （No. 2011GB108004） and MOST of China （Nos. 2010CB832902, 2010CB832904）
文摘Effects of Si^3＋ and H＋ irradiation on tungsten were investigated by internal friction （IF） technique. Scanning electron microscope （SEM） analysis revealed that sequential dual Si＋H irradiation resulted in more serious damage than single Si irradiation. After irradiation, the IF background was significantly enhanced. Besides, two obvious IF peaks were initially found in tem- perature range of 70～330 K in the sequential Si＋H irradiated tungsten sample. The mechanism of increased IF background for the irradiated samples was suggested to originate from the high density dislocations induced by ion irradiation. On the other hand, the relaxation peak PL and non-relaxation peak PH in the Si＋H irradiated sample were ascribed to the interaction process of hydrogen atoms with mobile dislocations and transient processes of hydrogen redistribution, respectively. The obtained experimental results verified the high sensitivity of IF method on the irradiation damage behaviors in nuclear materials.
基金This research was made possible with the financial support from NSFC China(61275188,61378089,81470029,61361160416)the 863 project,China,the Technology Development Program of Shenzhen City,the Committee of Science and Technology Innovation of Shenzhen(JCYJ20140902110354241)Science and Technology Project of Guangdong Province(2015A010106002).
文摘Surface functionalization of sensor chip for probe immobilization is crucial for the biosensing applications of surface plasmon resonance(SPR)sensors.In this paper,we report a method circulating the dopamine aqueous solution to coat polydopamine film on sensing surface for surface functionalization of SPR chip.The polydopamine film with available thickness can be easily prepared by controlling the circulation time and the biorecognition elements can be immobilized on the polydopamine film for specific molecular interaction analysis.These opera-tions are all performed under flow condition in the fuidic system,and have the advantages of easy implementation,less time consuming,and low cost,because the reagents and devices used in the operations are routinely applied in most laboratories.In this study,the specific absorption between the protein A probe immobilized on the sensing surface and human immunoglobulin G in the buffer is monitored based on this surface functionalization strategy to demonstrated its feasibility for SPR biosensing applications.
