检索结果-南通市图书馆

A novel fabrication technique for three-dimensional concave nanolens arrays

在线全文

学校读者我要写书评

暂无评论

Journal of Materiomics 2020年第3期6卷 557-562页

作者： Tianli Duan kang Xu Zhihong Liu Chenjie Gu Jisheng Pan Diing Shenp ang Rui Zhang Yao Wang Xuhang Ma SUSTech Core Research Facilities Southern University of Science and Technology1088 Xueyuan AvenueShenzhen518055China Department of Mechanical and Energy Engineering Southern University of Science and Technology1088 Xueyuan AvenueShenzhen518055China School of Microelectronics Xidian UniversityXian710071China Institute of Photonics Ningbo University818 Feng Hua RoadNingbo315211China Institute of Materials Research and Engineering A*STAR(Agency for ScienceTechnology and Research)2 Fusionopolis WayInnovis#08-03138634Singapore School of Electrical and Electronic Engineering Nanyang Technological UniversityNanyang Avenue639798Singapore

A novel facile technique is proposed for fabricating three-dimensional(3D)concave nanolens arrays on a silicon *** technique leverages an inherent characteristic of the polymethyl methacrylate(PMMA)resist during inductively coupled plasma(ICP)*** tendency for plasma ions to accumulate at the edge of the PMMA resist helps create a local electric field that causes the ions to etch the sidewall of the PMMA *** process progressively increases the uncovered area,resulting in a graded etched depth or a concave structure in the *** addition,using a given ICP etching recipe,the time required for a PMMA resist to be removed by sidewall etching is determined by its *** use of PMMA resist of different widths enables one to achieve structures of varying etched depths and thus a 3D lens *** characteristics of the fabricated nanolens were simulated using the FDTD(Finite-difference time-domain)method,and focal lengths ranging from 150 nm to 420 nm were *** type of nanolens is very useful in ultraviolet optical devices and CMOS image sensors.

关键词： Concave nanolens Three-dimensional lens array Nanofabrication Polymethyl methacrylate(PMMA) Inductively coupled plasma(ICP)

基于深度残差网络的走滑断层智能识别方法——以塔里木盆地富满油田为例

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

石油物探 2024年第1期63卷 129-137页

作者：孙冲雷刚林张银涛康鹏飞谢舟郑明君曹佳佳赵海山陈彦虎毕建军中国石油塔里木油田公司新疆库尔勒841000 北京中恒利华石油技术研究所北京100102

走滑断层精细识别是断控缝洞型碳酸盐岩油气藏勘探开发的关键环节之一,但走滑断层的水平位移在垂直断层走向的地震剖面上不易识别,为此,提出了一种基于深度残差网络的走滑断层智能识别方法。该方法的网络模型由特征提取子网络、结构提... 详细信息

走滑断层精细识别是断控缝洞型碳酸盐岩油气藏勘探开发的关键环节之一,但走滑断层的水平位移在垂直断层走向的地震剖面上不易识别,为此,提出了一种基于深度残差网络的走滑断层智能识别方法。该方法的网络模型由特征提取子网络、结构提取子网络和去噪卷积子网络3个子网络构成。特征提取子网络提取地震与断层预测映射的残差特征,结构提取子网络提取边界结构的残差映射实现断层解释的目标,去噪卷积子网络去除网络累计生成的噪声。网络在预测时采用了多层输出融合技术和迁移学习的方式,能有效避免高频特征信息的丢失,增强对不同规模断层分类解释的鲁棒性和泛化力。通过对合成记录验证分析可知,该方法对低信噪比地震资料情况下的小断距、弱走滑断层的识别精度高,预测的损失率低,预测断层连续性好,断层边界清晰,且抗噪性较好。塔里木盆地富满地区果勒西区块实际地震资料的应用结果表明,该方法对线性走滑断层、压扭辫状走滑断层和拉张辫状走滑断层等不同性质的走滑断层均有较好的识别效果。

关键词：断控缝洞体碳酸盐岩油气藏残差网络深度学习走滑断层智能识别

维普期刊数据库博看期刊

Effects of Surface Roughness on Interface Bonding Performance for 316H Stainless Steel in Hot-Compression Bonding

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2023年第5期36卷 771-788页

作者： Yong Zhao bi-Jun Xie Jin-Long Zhang Qin-Qiang Wang bin Xu Jiang Guo Zhu-Ji Jin Ren-Ke kang Dian-Zhong Li Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education Dalian University of TechnologyDalian116024China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China

The metallurgical bonding quality of bonding joints is affected by the substrate surface state in hot-compression bonding(HCB),and the surface roughness is a core indicator of the surface ***,the effects of surface roughness on interface bonding performance(IBP)in the HCB process are unclear for substrates with refractory oxide *** study presents the effects of surface roughness on IBP for 316H stainless steel joints fabricated by HCB.A set of HCB parameters for interface bonding critical state of 316H stainless steel joints was *** HCB experiments were carried out under parameters of interface bonding critical state to amplify the effect of surface *** interface morphologies,element distribution,and tensile properties were used to characterize the *** a result,the formation mechanisms of the interface pits were revealed and the variation trend of pit number with the roughness was ***,the mapping relation between surface roughness and IBP was *** results show that the degree of rotational dynamic recrystallization becomes weaker with the decrease in the surface roughness and the interface bonding mechanism is completely transformed into discontinuous dynamic recrystallization when the roughness is lower than 0.020μm *** number of interfacial pits decreases as the roughness decreases owing to the weakening of oxide scale aggregation and abrasive inclusion *** elongation of the tensile specimen cannot increase significantly while the roughness is lower than 0.698μm Sa.

关键词： Surface roughness Interface bonding performance Hot-compression bonding Mapping relation Critical state

Variations of helioseismic parameters due to magnetic field generated by a flux transport model

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2021年第4期21卷 235-242页

作者： Shao-Lan bi Tan-Da Li kang Liu Jie Jiang Ya-Guang Li Jing-Hua Zhang Xian-Fei Zhang Ya-Qian Wu Department of Astronomy Beijing Normal UniversityBeijing 100875China School of Physics and Astronomy University of BirminghamEdgbastonBirminghamB152TTUK School of Space and Environment Beihang UniversityBeijing 100871China Sydney Institute for Astronomy(SIfA) School of PhysicsUniversity of SydneyNSW 2006Australia Stellar Astrophysics Centre Department of Physics and AstronomyAarhus UniversityNy Munkegade 120DK-8000 Aarhus CDenmark National Astronomical Observatories Chinese Academy of SciencesBeijing

The change of sound speed has been found at the base of the convection during the solar cycles,which can be used to constrain the solar internal magnetic *** aim to check whether the magnetic field generated by the solar dynamo can lead to the cyclic variation of the sound speed detected through *** basic configuration of magnetic field in the solar interior was obtained by using a Babcock-Leighton(BL)type flux transport *** reconstructed one-dimensional solar models by assimilating magnetic field generated by an established dynamo and examined their influences on the structural *** results show that magnetic field generated by the dynamo is able to cause noticeable change of the sound speed profile at the base of the convective zone during a solar *** features of this theoretical prediction are also similar to those of the helioseismic results in solar cycle 23 by adjusting the free parameters of the dynamo model.

关键词： Sun:oscillations Sun:activity Sun:interior

Particulate aggregation through a modulated annular one-dimensional acoustic field at resonant frequencies

在线全文

学校读者我要写书评

暂无评论

Particuology 2021年第4期19卷 82-94页

作者： Zhenghui Qiao Xiaojun Pan Shaohua Liang Xiaolong bi Juan Wang Wei Xie kang Wang Yanwen Wang Jun Fang Xuefei Zhu Shaoxin Sun Shaohui Li College of Energy and Power Engineering Nanjing Institute of TechnologyNanjing 211167China Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 210096China

The visualization and analysis of a novel acoustic-particulate system is the objective of this study. The system is composed of rice-husk fired smoke particulates (36.7 nm-840 μm) and one annular resonant circular-tube waveguide contrarily coupled with two sound sources. The collective interaction behavior process of smoke particulates in an inhomogeneous acoustic field is displayed during an experiment and a simulation. The result shows that the aggregation and fragmentation of particles under a change in resonant frequencies and sound pressure amplitude is extremely complex. This complex process consists of dynamically tuning the particle characteristics to attain stripes shaped like thin-films/umbrellas and clusters with volume-change/fragmentation. The balanced modulation of the acoustic radiation force and secondary radiation force to alter the particle characteristics (size and stack density) is verified to be the control mechanism of the particle system. The intermediate variable of the process control is the acoustic contrast factor (Φ) related to the physical characteristics of the growing particulates. The value plus-minus alternation of Φ results in different particulate processes. This study can enhance the application of aerodynamic acoustic-particulate-fluid systems for environment protection, energy fuel conversion, and industrial production.

关键词： Acoustic aggregation Porous particulates Secondary radiation force Acoustic radiation force Stripe pattern Inhomogeneous field

Broadband strong optical dichroism in topological Dirac semimetals with Fermi velocity anisotropy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第7期29卷 128-134页

作者： J Lim K J A Ooi C Zhang L K ang Yee Sin ang Science Math and TechnologySingapore University of Technology and DesignSingapore School of Energy and Chemical Engineering Xiamen University MalaysiaSelangor Darul Ehsan 43900Malaysia College of Chemistry and Chemical Engineering Xiamen UniversityXiamen 361005China School of Physics University of WollongongNorthfields AvenueNew South Wales 2522Australia

Prototypical three-dimensional(3D)topological Dirac semimetals(DSMs),such as Cd3As2 and Na3bi,contain electrons that obey a linear momentum-energy dispersion with different Fermi velocities along the three orthogonal momentum *** being extensively studied in recent years,the inherent Fermi velocity anisotropy has often been neglected in the theoretical and numerical studies of 3D *** this omission does not qualitatively alter the physics of light-driven massless quasiparticles in 3D DSMs,it does quantitatively change the optical coefficients which can lead to nontrivial implications in terms of nanophotonics and plasmonics *** we study the linear optical response of 3D DSMs for general Fermi velocity values along each *** the signature conductivity-frequency scaling,σ(ω)∝ω,of 3D Dirac fermion is well-protected from the Fermi velocity anisotropy,the linear optical response exhibits strong linear dichroism as captured by the universal extinction ratio scaling law,Λi j=(vi/v j)^2(where i=j denotes the three spatial coordinates x,y,z,and vi is the i-direction Fermi velocity),which is independent of frequency,temperature,doping,and carrier scattering *** Cd3As2 and Na3bi3,an exceptionally strong extinction ratio larger than 15 and covering a broad terahertz window is *** findings shed new light on the role of Fermi velocity anisotropy in the optical response of Dirac semimetals and open up novel polarization-sensitive functionalities,such as photodetection and light modulation.

关键词： topological Dirac semimetal optical anisotropy linear dichroismn linear response theory

Efficacy and economic analysis of Ex- PRESS implantation versus trabeculectomy in uncontrolled glaucoma： a systematic review and Meta-analysis

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2016年第1期9卷 124-131页

作者： Ling Wang Fang Sha Da-Dong Guo Hong-Sheng bi Jun-kang Si Yu-Xiang Du Kai Tang Shandong University of Traditional Chinese Medicine Jinan 250002 Shandong Province China Jining Medical University Jining 272000 Shandong Province China Affiliated Eye Hospital of Shandong University of Traditional Chinese Medicine Jinan 250002 ShandongProvince China Eye Institute of Shandong University of Traditional Chinese Medicine Jinan 250002 Shandong Province China

AIM：To systematically review the current evidence based on the efficacy and cost of Ex-PRESS implantation and trabeculectomy（Trab）for uncontrolled glaucoma.·METHODS：Clinical trials were identified by electronic databases（Pub Med,EMBASE,ISI Web of science and Cochrane library）,and data,such as intraocular pressure（IOP）,the complete and qualified success rate,the postoperative complications and the cost,were exacted from these relevant *** mean difference（WMD）,odds ratio（OR）and 95%confidence intervals（CIs）were calculated and were pooled using a randomeffects model.·RESULTS：Eleven relevant publications and two abstracts met the inclusion *** efficacy of ExPRESS was similar to that of Trab in the percentage of IOP reduction（IOPR%）at 1,2y（WMD：-2.01;95%CI：-7.92-3.90;=0.50 and WMD：2.89;95%CI：-8.05-13.83;=0.60,respectively）.Ex-PRESS possessed a significant higher complete and qualified success rate（OR：1.59;95%CI：1.07-2.35;=0.02 and OR：1.74;95%CI：1.06-2.86;=0.03,respectively）.Moreover,Ex-PRESS exerted a significantly lower frequency of hypotony and hyphema than Trab（OR：0.39;95%CI：0.21-0.72;=0.003 and OR：0.27;95%CI：0.10-0.69;=0.003,respectively）.However,there was no consistent result on the cost between the two groups according to the previous three studies.·C ONCLUSION：Both Trab and Ex-PRESS have equivalent efficacy in lowering IOP,yet Ex-PRESS had a lower risk of hypotony and hyphema than ***,whether the cost of Ex-PRESS was less than that of Trab should be further investigated to ensure evidence-based conclusion in the long run.

关键词： Ex-PRESS implantation trabeculectomy uncontrolled glaucoma systematic review Meta-analysis

Investigation on plasma structure evolution and discharge characteristics of a single-stage planar-pulsed-inductive accelerator under ambient fill condition

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第11期29卷 398-405页

作者： Xiao-kang Li bi-Xuan Che Mou-Sen Cheng Da-Wei Guo Mo-Ge Wang Yun-Tian Yang College of Aerospace Science and Engineering National University of Defense TechnologyChangsha 410073China

The physical process of a single-stage planar-pulsed-inductive accelerator is *** include the waveforms of circuit current,capacitor voltage,plasma radiation intensity,and temporal plasma structure photos captured by a high-speed *** are conducted under static ambient fill condition using argon as *** values of capacitor voltage and gas pressure are *** discussions quantify the EM interaction between circuit and plasma,as well as their energy deposition and current sheet *** on the results of experiments,physical mechanisms of the initial ionization phase and the following acceleration phase are analyzed theoretically.

关键词： electric propulsion pulsed-inductive thruster discharge characteristics plasma structure

Ranibizumab alone or in combination with photodynamic therapy vs photodynamic therapy for polypoidal choroidal vasculopathy: a systematic review and Meta-analysis

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2015年第5期8卷 1056-1066页

作者： Kai Tang Jun-kang Si Da-Dong Guo Yan Cui Yu-Xiang Du Xue-Mei Pan Hong-Sheng bi Affiliated Eye Hospital of Shandong University of Traditional Chinese Medicine Department of Ophthalmology Shandong University of Traditional Chinese Medicine Eye Institute of Shandong University of Traditional Chinese Medicine

AIMTo compare the efficacy of intravitreal ranibizumab (IVR) alone or in combination with photodynamic therapy (PDT) vs PDT in patients with symptomatic polypoidal choroidal vasculopathy (PCV).METHODSA systematic search of a wide range of databases (including PubMed, EMBASE, Cochrane Library and Web of Science) was searched to identify relevant studies. Both randomized controlled trials (RCTs) and non-RCT studies were included. Methodological quality of included literatures was evaluated according to the Newcastle-Ottawa Scale. RevMan 5.2.7 software was used to do the *** RCTs and 6 retrospective studies were included. The results showed that PDT monotherapy had a significantly higher proportion in patients who achieved complete regression of polyps than IVR monotherapy at months 3, 6, and 12 (All P≤0.01), respectively. However, IVR had a tendency to be more effective in improving vision on the basis of RCTs. The proportion of patients who gained complete regression of polyps revealed that there was no significant difference between the combination treatment and PDT monotherapy. The mean change of best-corrected visual acuity (BCVA) from baseline showed that the combination treatment had significant superiority in improving vision vs PDT monotherapy at months 3, 6 and 24 (All Pbilizing or in improving vision, although it can hardly promote the regression of polyps. The combination treatment of PDT and IVR can exert a synergistic effect on regressing polyps and on maintaining or improving visual acuity. Thus, it can be the first-line therapy for PCV.

关键词： photodynamic therapy ranibizumab combination treatment monotherapy polypoidal choroidal vasculopathy Meta-analysis systematic review