检索结果-内蒙古大学图书馆

IEEE Metrology for Aerospace

作者： Sara Coppola Veronica Vespini Anna Palma Concetta Di Natale Simonetta Grilli Pietro Ferraro CNR-ISASI Institute of Applied Sciences and Intelligent Systems “E. Caianiello” Napoli Italy Department of Chemical Engineering Materials and Industrial Production University of Naples Federico II Napoli Italy

ISBN: (数字)9798350385045

ISBN: (纸本)9798350385052

Nowadays the direct healthcare cost represent an enormous part of the government welfare system and it is still increasing worldwide. The development of minimally invasive devices could unload the pressure of the welfare system and at the same time could support patients in-home therapy avoiding hospitalization and all the emotional commitment related to it (anxiety, stress, panic attack, fear). If we add that it is estimated that 5.4 million cases of carcinoma are diagnosed annually in the United States among 3.3 million people (sometimes more than 1 nonmelanoma skin cancer per person), with a rate increased up to 77% in the last years, it appears still more evident the urgency to design innovative and portable systems. Despite all the conventional, and debilitating radiotherapies/chemotherapy, photo-thermal therapy (PTT) is arising as a promising solution for cancer management, predominantly when mediated by gold nanoparticles (Au NPs) for their intrinsic ability to convert a monochromatic (resonant) light into thermal energy [2]–[4]. However, the weakness of current therapy by light is that light cannot penetrate the skin deeply because of the skin properties (a complex heterogeneous medium with various optical characteristics) and consequent tissue's absorption, reflection, and refraction. Creating a light-through channel from outside the skin to the cells to target could be an excellent tool for realizing minimally invasive and in-situ PTT. Here we discuss about the fabrication of advanced functionalized microneedles (MNs) as micro photonic structures. Gold nanoparticles (Au NPs) are selected as nanofiller components for transdermal drug delivery properties because of their intrinsic ability to convert a monochromatic (resonant) light into thermal energy (photo-thermal effect). We propose a nano in micro strategy by embedding (Au NPs) in a microarray of polymeric microneedles. The various methods proposed and used for micro-needle fabrication usually require lo

关键词： Nanoparticles Gold Minimally invasive surgery Costs Medical treatment Skin Polymers

来源：评论

学校读者我要写书评

暂无评论

稀疏码分多址技术发展及前景

引用

科学技术与工程 2023年第5期23卷 1789-1798页

作者：雷拓峰倪淑燕崔亮程乃平宋鑫陈世淼航天工程大学研究生院北京101416 航天工程大学电子与光学工程系北京101416 66407部队北京100144

提升频谱资源利用率是未来移动通信亟待解决的一项重要目标。其中,稀疏码分多址(sparse code multiple access,SCMA)技术具备频谱利用率高、抗干扰性能力强、系统兼容性好等优点,已成为一种非常有前景的非正交多址方案。为了在未来移动... 详细信息

提升频谱资源利用率是未来移动通信亟待解决的一项重要目标。其中,稀疏码分多址(sparse code multiple access,SCMA)技术具备频谱利用率高、抗干扰性能力强、系统兼容性好等优点,已成为一种非常有前景的非正交多址方案。为了在未来移动通信中进一步发展稀疏码分多址技术,综述了现有稀疏码分多址技术的研究成果,对其研究现状进行了总结分析。首先,分析了现有的码本设计方案,指出了其设计特点以及目前尚存在的问题,并给出相应的解决方案;其次,在解码算法方面,给出了目前两种常见的解码算法,简述了其基本原理,并介绍了一些新兴的解码算法;再次,就SCMA技术与其他技术结合而言,从3个方面总结了目前SCMA技术的研究成果,并探讨了SCMA技术在应用层面潜在的发展的方向;最后,总结了稀疏码分多址技术的发展挑战和趋势。

关键词：稀疏码分多址技术码本设计解码算法稀疏码分多址应用

来源：评论

学校读者我要写书评

暂无评论

Application of GPUs in optical design software 20

Application of GPUs in optical design software

引用

Conference on current developments in Lens design and optical engineering XX

作者： Mischuck, Brian Page, Erik Croce, Alessandra Zemax 10230 NE Points Dr 500 Kirkland WA 98033 USA

ISBN: (数字)9781510629028

ISBN: (纸本)9781510629028

We present an overview of the pros and cons of using GPUs in optical design software. While GPUs can run multiple calculations in parallel, that parallelization comes with a price. We will discuss the trade-offs that allow GPUs to run up to thousands of cores in parallel and how those trade-offs effect the use of GPUs in optical design software. In particular, we review the use of GPUs in several steps of design calculations, including ray-tracing and computationally expensive steps such as calculating Huygens integrals.

关键词： OpticStudio GPU PSF Scientific Computing

来源：评论

学校读者我要写书评

暂无评论

Method to determine refractive index by measurement of flat plates 20

Method to determine refractive index by measurement of flat ...

引用

Conference on current developments in Lens design and optical engineering XX

作者： Johnson, R. Barry Curley, Michael J. Alabama A&M Univ Dept Phys Chem & Math Coll Engn Technol & Phys Sci Huntsville AL 35811 USA Alabama A&M Univ Dept Elect Engn & Comp Sci Coll Engn Technol & Phys Sci Huntsville AL 35811 USA

ISBN: (数字)9781510629028

ISBN: (纸本)9781510629028

Minimal refractive index data in the near-infrared spectrum are available for optical plastics. Typically, refractive index measurements are made by fabricating a prism of candidate optical material and using appropriate metrology equipment. Few plastics are available in thicknesses adequate to fabricate appropriate size prisms;however, almost all optical plastics can be acquired in a flat plate form. The investigation considered two fundamental approaches to measure the refractive index by (i) rotating a flat plate and measure the beam displacement and ( ii) measuring the optical focal shift. The rotation method was determined not accurate enough. An optical focal shift method optical(n = t(optical)/t(mechanical)) was developed that utilized existing laboratory equipment. The shift of focus when the plastic plate sample was inserted was located by determining the position of maximum contrast of the projection of a Ronchi ruling target when illuminated by flux from a Cary Eclipse covering the spectral range of 550-975 nm. The instrumentation, data processing, and measurement performance are presented.

关键词： refractive index measurement metrology optical materials

来源：评论

学校读者我要写书评

暂无评论

General formula for aspheric collimator lens design free of spherical aberration 20

General formula for aspheric collimator lens design free of ...

引用

Conference on current developments in Lens design and optical engineering XX

作者： Gonzalez-Acuna, Rafael G. Gutierrez-Vega, Julio C. Tecnol Monterrey Photon & Math Opt Grp Monterrey 64849 Mexico

We present the general formula to generated aspheric collimator lens free of spherical aberration and astigmatism. The presented formula describes the second surface of the aspheric singlet such as it correct the sphe... 详细信息

ISBN: (数字)9781510629028

ISBN: (纸本)9781510629028

关键词： optical design aspheric collimator

来源：评论

学校读者我要写书评

暂无评论

DNAzyme-based biosensors for mercury (ii) detection: Rational construction, advances and perspectives

引用

JOURNAL OF HAZARDOUS MATERIALS 2022年 431卷 128606-128606页

作者： Cheng, Zehua Wei, Jinchao Gu, Liqiang Zou, Liang Wang, Ting Chen, Ling Li, Yuqing Yang, Yu Li, Peng Univ Macau State Key Lab Qual Res Chinese Med Inst Chinese Med Sci Macau Peoples R China Soochow Univ Jiangsu Key Lab Carbon Based Funct Mat & Devices Inst Funct Nano & Soft Mat FUNSOM Suzhou 215123 Jiangsu Peoples R China Shanghai Jiao Tong Univ Sch Med Renji Hosp Inst Mol Med IMM Shanghai 200240 Peoples R China Chengdu Univ Sch Med Chengdu 610106 Peoples R China

Mercury contamination is one of the most severe issues in society due to its threats to public health and the ecological system. However, traditional methods for mercury ion detection are still limited by their timeconsuming procedures, requirement of expensive instruments, and low selectivity. In recent decades, tremendous progress has been made in the development of functional nucleic acid-based, especially DNAzyme sensors for mercury (ii) (Hg2+) determination, including RNA-cleaving DNAzymes and G-quadruplex-based DNAzymes in particular. Researchers have heavily studied the construction of Hg2+ sensors, mainly originating from in vitro selection-derived DNAzymes, by incorporating T-Hg2+-T recognition moieties in existing DNAzyme scaffolds, and interfacing Hg2+-sensitive sequences with nanomaterials. In the last case, the employment of materials (as quenchers, signal transducers and DNA immobilizers) enriches the application scenarios of current Hg2+-DNAzymes, due to a combination of their functions. We summarize a broad range of sensing approaches, including optical, electrochemical, and other sensing methods, and compare their features. This review elaborates on the rational design strategies for engineering DNAzymes to selectively sense Hg2+, critically discusses their properties in different application scenarios, and summarizes recent advances in this field. Additionally, current progress, challenges and future perspectives are also discussed. This minireview provides deeper insights into the chemistry of these functional nucleic acids when working with Hg2+, explains the design ideas of DNAzymesensors in each platform, and reveals potential opportunities in developing more advanced DNAzyme sensors for the highly selective and sensitive recognition of Hg2+.& nbsp;Environmental Implication: Mercury is one of the most toxic metallic contaminants due to its high toxicity, non biodegradability, and serious human health risks when accumulated in the body. In the r

关键词： Hg Heavy metal DNAzymes Sensors Nanomaterials

来源：评论

学校读者我要写书评

暂无评论

Spatial resolution of an optical microscope with oblique illumination 20

Spatial resolution of an optical microscope with oblique ill...

引用

Conference on current developments in Lens design and optical engineering XX

作者： Borovytsky, Volodymyr Natl Tech Univ Ukraine Igor Sikorsky KPI Opt Engn Dept Pr Peremogy 37 UA-03056 Kiev Ukraine

ISBN: (数字)9781510629028

ISBN: (纸本)9781510629028

This paper presents the theory for numerical evaluation of the spatial resolution along an optical axis of an optical microscope in case of oblique illumination. It considers the optical setup with a coherent light source, a microscope condenser, a grating located in a plane with an optical axis and with grating slits perpendicular to this axis and a microscope objective. It is proposed the analytical expression for calculation of the minimal resolvable period of this grating or the corresponded spatial cutoff frequency that characterizes the spatial resolution along the optical axis. It is demonstrated that this spatial cutoff frequency is not proportional to the angle of beam inclination. The proposed theory clearly explains why an optical microscope has the limited spatial resolution along an optical axis and how illumination can maximize this resolution.

关键词： Fourier optics image formation diffraction theory optical microscopy spatial resolution Abbe theory optics education spatial cutoff frequency spatial bandwidth

来源：评论

学校读者我要写书评

暂无评论

Multivariate thinking for optical microfluidic analytical devices-A tutorial review

引用

MICROCHEMICAL JOURNAL 2021年 164卷 105959-105959页

作者： Cuadros-Rodriguez, Luis Jimenez-carvelo, Ana M. Fernandez-Ramos, M. D. Univ Granada Dept Analyt Chem Chem Metrol & Qualimetr CMQ C Fuentenueva S-N E-18071 Granada Spain Univ Granada Dept Analyt Chem Elect & Chem Sensing Solut ECsens C Fuentenueva S-N E-18071 Granada Spain

Microfluidic analytical devices (?FADs) made from glass, polymeric materials or paper are considered as a powerful tool in several fields such as chemistry, engineering, pharmaceutics, forensics, medicine, environment, food, biology and biotechnology, or security and biodefence. optical-based ?FADs measuring molecular spectroscopic properties such as transmission, absorption, reflection, fluorescence, or Raman are not alien to this framework and most of the developments currently underway are still focused on the use of univariate models. Multivariate models could be used to: (i) optimize concurrently the experimental variables (factors) in order to find the best operative conditions for chemical or technical processes, (ii) classify or discriminate material systems regarding one or more interesting features, and/or (iii) determine simultaneously the value of multiple physical?chemical properties directly or indirectly related to the chemical composition. In addition, multivariate models overlook problems arising from the interaction between experimental variables, or biases caused by the lack of measuring device selectivity. However, this strategy is still poorly applied and is a clear focus of progress in the development of ?FADs. This tutorial aims to describe the potential and tools available to carry out these sorts of applications focused on the use of multivariate models and to critically review the published literature on this topic. Technical aspects related to the design and development of optical ?FADs will not be considered.

关键词： Microfluidic analytical device (?FAD) Multivariate models Chemometrics Optimization Qualitative and quantitative outcomes

来源：评论

学校读者我要写书评

暂无评论

Indoor Organic Photovoltaics: Optimal Cell design Principles with Synergistic Parasitic Resistance and optical Modulation Effect

引用

ADVANCED ENERGY MATERIALS 2021年第27期11卷

作者： Saeed, Muhammad Ahsan Kim, Sang Hyeon Kim, Hyeok Liang, Jiaen Woo, Han Young Kim, Tae Geun Yan, He Shim, Jae Won Dongguk Univ Div Elect & Elect Engn Seoul 04620 South Korea Korea Univ Sch Elect Engn Seoul 02841 South Korea Univ Seoul Sch Elect & Comp Engn Seoul 02504 South Korea Hong Kong Univ Sci & Technol Chinese Natl Engn Res Ctr Tissue Restorat & Recon Dept Chem Kowloon Clear Water Bay Hong Kong Peoples R China Hong Kong Univ Sci & Technol Chinese Natl Engn Res Ctr Tissue Restorat & Recon Hong Kong Branch Kowloon Clear Water Bay Hong Kong Peoples R China Korea Univ Dept Chem Seoul 02841 South Korea

Recently, indoor organic photovoltaics (OPVs) has attracted substantial research attention, due to the emergence of self-powered electronic devices for Internet-of-Things (IoT) applications. This progress report discusses recent developments in indoor OPVs, focusing on the strategic role of synergistic parasitic resistance in suppressing the leakage current to achieve high indoor efficiencies. Moreover, an underexplored area is presented, namely the impact of optical modulation on enhancing light absorption in indoor OPVs. First, the main advances in material design for indoor OPVs are briefly presented. This is followed by detailed discussions of the crucial strategies, including interfacial engineering, the effect of photoactive layer thickness, and the effectiveness of transparent conducting electrodes for improving the OPV performance. Overall, this review highlights that understanding the indispensable role of parasitic resistance under dim light conditions may provide new opportunities for developing efficient indoor OPVs for practical applications. Finally, after summarizing recent progress in indoor OPVs, a critical perspective is provided.

关键词： charge transport layers indoor organic photovoltaics optical modulation effects parasitic resistance effects photoactive materials transparent conducting electrodes

来源：评论

学校读者我要写书评

暂无评论

High power, high wall-plug efficiency, high reliability, continuous-wave operation quantum cascade lasers at Center for Quantum Devices 2

High power, high wall-plug efficiency, high reliability, con...

引用

optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology ii 2020

作者： Razeghi, Manijeh Center for Quantum Devices Department of Electrical Engineering and Computer Science Northwestern University EvanstonIL60208 United States

ISBN: (数字)9781510633568

ISBN: (纸本)9781510633551

Since the demonstration of the first quantum cascade laser (QCL) in 1997, QCLs have undergone considerable developments in output power, wall plug efficiency (WPE), beam quality, wavelength coverage and tunability. Among them, many world-class breakthroughs were achieved at the Center for Quantum Device at Northwestern University. In this paper, we will discuss the recent progress of our research and present the main contributions of the Center for Quantum Devices to the QCL family on high power, high wall-plug efficiency (WPE), continuous-wave (CW) and room temperature operation lasers. © 2020 SPIE.

关键词： Room temperature

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：