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Quantum Theory of Nonlinear Plasmonics by S. G. Rautian 非线性等离子体量子理论》,S. G. Rautian 著
IF 0.4 Q4 PHYSICS, MULTIDISCIPLINARY Pub Date : 2024-06-20 DOI: 10.3103/s8756699024700031
V. P. Drachev

Abstract

Resonance properties of the local field of metal fractal clusters are considered. The effects of surface-enhanced Raman scattering, photoluminescence enhancement, and nonlinear responses are studied. It is demonstrated that the Rautian’s model based on the quantum theory of nonlinearity offers a more accurate description than previous theories. Among the scientific results of the theory proposed by Rautian and his team, the following can be highlighted: metal nanoparticles with a diameter of (<)30 nm exhibit discrete energy levels, in contrast to semiconductor quantum dots, the Rautian’s theory provides an accurate description of the linear part of the dielectric function corresponding to the classical Drude model; the cubic nonlinear susceptibility according to the Rautian’s model agrees with experiment, indicating a contribution of the conduction electrons.

摘要 研究了金属分形团簇局部场的共振特性。研究了表面增强拉曼散射、光致发光增强和非线性响应的影响。研究表明,基于量子非线性理论的劳蒂安模型比以往的理论提供了更精确的描述。在劳天及其团队提出的理论所取得的科学成果中,以下几点值得强调:与半导体量子点不同,直径为 30 纳米的金属纳米粒子表现出离散能级;劳天理论能准确描述与经典德鲁德模型相对应的介电函数的线性部分;根据劳天模型得出的立方非线性电感与实验结果一致,表明传导电子做出了贡献。
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引用次数: 0
Detection of Areas of the Anthropogenically Transformed Natural Environment Based on a Comprehensive Analysis of Multiseasonal Multispectral Survey 基于多季节多光谱测量综合分析的人类改造自然环境区域探测
IF 0.4 Q4 PHYSICS, MULTIDISCIPLINARY Pub Date : 2024-06-20 DOI: 10.3103/s8756699024700080
I. V. Zhurbin, A. S. Shaura, A. G. Zlobina, A. I. Bazhenova

Abstract

A comprehensive analysis of multispectral data obtained in different growing periods makes it possible to reconstruct the current state of the anthropogenically transformed natural environment and identify areas of historical nature management. Ambiguous displaying of secondary succession of forests requires comparison of changes in the spectral features of vegetation and features of the landscape objects texture on multiseason images. The methodological basis of such studies is an algorithm of multispectral data processing adapted to apply Haralick’s textural features at the feature extraction stage. Joint segmentation of multiseasonal multispectral images smooths out local and less significant changes in the texture of landscape objects, which makes it possible to more clearly demonstrate the general trends in the distribution of vegetation. The survey area included a fragment of the ironworks district of the Pudemsky ironworks, where timber and firewood were cut down for production needs in the first half of the 19th century. The segmented image demonstrates the fundamental differences between the vegetation cover of the western and eastern parts of the survey area (the site of historical cutting areas and the part of the ironworks district that was not subject to intense anthropogenic impact).

摘要 对不同生长期获得的多光谱数据进行综合分析,可以重建人类改造自然环境的现状,并确定历史上自然管理的区域。森林次生演替的模糊显示需要比较植被光谱特征的变化和多季节图像上景观物体纹理的特征。此类研究的方法论基础是在特征提取阶段应用哈拉利克纹理特征的多光谱数据处理算法。对多季节多光谱图像进行联合分割可以平滑景观物体纹理的局部和不太明显的变化,从而更清晰地展示植被分布的总体趋势。调查区域包括普德姆斯基炼铁厂区的一个片段,19 世纪上半叶,这里的木材和木柴因生产需要而被砍伐。分段图像显示了调查区西部和东部(历史上的砍伐区所在地和未受强烈人为影响的炼铁厂区部分)植被覆盖之间的根本差异。
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引用次数: 0
Experimental Evaluation of the Accuracy of Range Measurement with Multiarea Methods Using an Active-Pulse Television Measuring System 使用主动脉冲电视测量系统对多区域方法测距精度的实验评估
IF 0.4 Q4 PHYSICS, MULTIDISCIPLINARY Pub Date : 2024-06-20 DOI: 10.3103/s8756699024700134
V. V. Kapustin, A. K. Movchan, A. A. Tislenko

Abstract

The accuracy of constructing maps of spatial depths is evaluated using an active-pulse television measuring system based on experimental data. Two multiarea methods of constructing depth maps are described. The absolute error and root-mean-square error of range measurement for depth maps constructed from real and averaged frames, which were obtained using the described multiarea methods during experimental studies, are estimated. Approximating functions of linear and polynomial types calculated using the least squares method are taken as measurement functions, from which the depth maps were constructed.

摘要 根据实验数据,使用主动脉冲电视测量系统对绘制空间深度图的准确性进行了评估。介绍了两种多区域深度图构建方法。估算了在实验研究中使用所述多区域方法获得的真实帧和平均帧构建的深度图的绝对误差和均方根误差。使用最小二乘法计算的线性和多项式类型的近似函数被用作测量函数,深度图就是根据这些函数绘制的。
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引用次数: 0
Secure Data Transmission in Smart Cities Using DNA Cryptography with LZW Compression Algorithm 利用 DNA 密码学和 LZW 压缩算法实现智能城市的安全数据传输
IF 0.4 Q4 PHYSICS, MULTIDISCIPLINARY Pub Date : 2024-06-20 DOI: 10.3103/s875669902470016x
S. Karthikeyan, T. Poongodi

Abstract

Internet of Things (IoT) provides a vital atmosphere for a wide number of exciting applications in sustainable digital cities and societies, including additive factories, smart transportation, and smart industry. However, in a smart city environment, security measures may not be effective during data transmission. Data manipulation may result from the interchange of data between various devices, and transmission of unprocessed data may be particularly vulnerable to such manipulation attempts. In order to reduce data tampering, it is required to compress and encrypt the raw data and transmit it over the network to protect it from cyberattacks. In this research, the data is compressed by the LZW lossless compression algorithm and subsequently encrypted using DNA cryptography. Initially, the raw data are collected through various IoT devices. The raw data are compressed using LZW lossless compression algorithm. Compression is advantageous since it minimizes the amount of storage and transmission resources required. Through data compression, a smaller amount of bits are required for representing data. After compressing the data, the compressed data are encrypted using a DNA cryptography algorithm. DNA cryptography is used to encrypt compressed data for secure data transmission. After encryption, the encrypted data are secured within the cloud. The simulation assessment displays the suggested approach attains a 90(%) compression and encryption rate. This illustrates that the suggested approach performs better than current approaches already in use. Based on this proposed method, the transaction is executed securely to provide a secure smart city environment.

摘要物联网(IoT)为可持续发展的数字城市和社会中大量令人兴奋的应用提供了重要的氛围,其中包括快速成型工厂、智能交通和智能工业。然而,在智能城市环境中,数据传输过程中的安全措施可能并不有效。各种设备之间的数据交换可能会导致数据篡改,而未经处理的数据传输尤其容易受到此类篡改企图的影响。为了减少数据篡改,需要对原始数据进行压缩和加密,并通过网络传输,以防止网络攻击。在这项研究中,数据采用 LZW 无损压缩算法进行压缩,然后使用 DNA 密码学进行加密。首先,通过各种物联网设备收集原始数据。原始数据使用 LZW 无损压缩算法进行压缩。压缩的优势在于可以最大限度地减少所需的存储和传输资源。通过数据压缩,表示数据所需的比特数量更少。压缩数据后,使用 DNA 密码学算法对压缩数据进行加密。DNA 密码学用于加密压缩数据,以确保数据传输的安全性。加密后,加密数据在云中得到保护。模拟评估显示,所建议的方法达到了90(%)的压缩和加密率。这说明所建议的方法比目前已在使用的方法性能更好。基于这种建议的方法,交易可以安全地执行,从而提供一个安全的智慧城市环境。
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引用次数: 0
Progress and Prospects in the Field of Quantum Computing 量子计算领域的进展与前景
IF 0.4 Q4 PHYSICS, MULTIDISCIPLINARY Pub Date : 2024-06-20 DOI: 10.3103/s8756699024700043
I. I. Beterov

Abstract

The paper provides a brief review of modern achievements in quantum information science with problems and prospects in the development of quantum computing. The elementary mathematical model of quantum computing and the concept of quantum supremacy are discussed. The application of ultracold atoms for the implementation of quantum processors is considered.

摘要 本文简要回顾了量子信息科学的现代成就以及量子计算发展中存在的问题和前景。讨论了量子计算的基本数学模型和量子至上的概念。考虑了超冷原子在实现量子处理器中的应用。
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引用次数: 0
Study of Long-Term Stability of Free-Space Quantum Key Distribution at a Distance of 20 m in a Polarization Coding Scheme 极化编码方案中 20 米距离自由空间量子密钥分发的长期稳定性研究
IF 0.4 Q4 PHYSICS, MULTIDISCIPLINARY Pub Date : 2024-06-20 DOI: 10.3103/s8756699024700055
A. S. Pleshkov, A. V. Kolyako, D. B. Tret’yakov, I. I. Ryabtsev, I. G. Neizvestnyi

Abstract

The operation of our atmospheric quantum cryptography system using the BB84 protocol and polarization coding is experimentally studied. The distribution rate of the sifted quantum key and the quantum bit error rate in the key remained constant for 1 hour and were (7558pm 83) bit s({}^{-1}) and (5.1pm 0.84%), respectively, at the distance of 20 m between the transmitter and receiver. The minimum possible transmittance of a quantum channel, ensuring the security of a quantum key, is calculated for the given parameters of the system

摘要 实验研究了使用BB84协议和极化编码的大气量子密码系统的运行情况。在发射器和接收器之间的距离为20米时,筛分量子密钥的分发率和密钥中的量子比特错误率在1小时内保持不变,分别为(7558/pm 83/)比特({}^{-1}/)和(5.1/pm 0.84%/%)。根据给定的系统参数,可以计算出确保量子密钥安全的量子信道的最小可能传输率
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引用次数: 0
Specialized Integrated Circuit for Coordinate Counting Detectors 用于坐标计数探测器的专用集成电路
IF 0.4 Q4 PHYSICS, MULTIDISCIPLINARY Pub Date : 2024-06-20 DOI: 10.3103/s8756699024700079
A. A. Glushak, V. M. Aulchenko, V. V. Zhulanov, L. I. Shekhtman

Abstract

A multichannel application specific integrated circuit (ASIC) for registration and processing of signals from microstrip sensors in synchrotron radiation coordinate detectors developed at the BINP SB RAS to equip the SKIF experimental stations is presented. The ASIC contains 64 independent photon registration channels with 4 energy separation thresholds. The range of registered energies is from 3 to 60 keV. The structure and main parameters of the registration channel electronics for direct photon counting are described in detail.

摘要 介绍了 BINP SB RAS 为装备 SKIF 实验站而开发的用于登记和处理同步辐射坐标探测器中微带传感器信号的多通道专用集成电路(ASIC)。ASIC 包含 64 个独立的光子登记通道,有 4 个能量分离阈值。登记的能量范围为 3 至 60 千伏。详细介绍了用于直接光子计数的登记通道电子设备的结构和主要参数。
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引用次数: 0
Detection of Deer in Images by Computer Vision Methods 用计算机视觉方法检测图像中的鹿
IF 0.4 Q4 PHYSICS, MULTIDISCIPLINARY Pub Date : 2024-06-20 DOI: 10.3103/s8756699024700109
S. N. Tereshchenko, A. L. Osipov

Abstract

An approach to applying machine learning methods for automatic detection of deer individuals in images has been studied. Neural network technology has been used to accurately count the number of deer from photographs. Deep learning methods for convolutional neural networks (ResNet 50, DenseNet, CenterNet, Inception V3, and Xception) were used in conjunction with the transfer learning technique. Based on the faster R-CNN Resnet50 network, a neural network was trained to identify deer individuals from graphic images with an accuracy of 0.91 on a sample using the F1-score metric with a threshold value of 0.6.

摘要 研究了一种应用机器学习方法自动检测图像中鹿个体的方法。神经网络技术被用于从照片中精确计算鹿的数量。卷积神经网络(ResNet 50、DenseNet、CenterNet、Inception V3 和 Xception)的深度学习方法与迁移学习技术结合使用。以速度更快的 R-CNN Resnet50 网络为基础,对神经网络进行了训练,使用阈值为 0.6 的 F1 分数指标,从图形图像中识别鹿个体的准确率达到 0.91。
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引用次数: 0
Increasing the Accuracy of Constructing Terrain Orthophotomaps from Blur-Distorted Images from an Unmanned Aerial Vehicle 提高利用无人飞行器拍摄的模糊失真图像绘制地形正射影像图的精度
IF 0.4 Q4 PHYSICS, MULTIDISCIPLINARY Pub Date : 2024-06-20 DOI: 10.3103/s8756699024700110
A. S. Zakhlebin, M. I. Kuryachii, V. V. Kapustin, A. V. Kamenskii, A. K. Movchan

Abstract

A technique for restoring images from an unmanned aerial vehicle (UAV) distorted by blur is considered. Images are reconstructed using the point spread function (PSF), calculated based on a priori information about the basic flight and photographing parameters, as well as the physical properties of the optical system used. The images are processed using well-known methods such as Wiener filtering, Richardson–Lucy deconvolution, Tikhonov filtering, and blind deconvolution.

摘要 研究了一种用于恢复因模糊而失真无人驾驶飞行器(UAV)图像的技术。图像是利用点扩散函数(PSF)重建的,该函数是根据有关基本飞行和拍摄参数的先验信息以及所用光学系统的物理特性计算得出的。图像的处理采用了众所周知的方法,如维纳滤波法、理查森-卢西解卷法、提霍诺夫滤波法和盲解卷法。
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引用次数: 0
Comparative Analysis of Ontology Based Data Access Control and Security Enhancement in Healthcare Application 基于本体的数据访问控制与医疗应用中安全性增强的比较分析
IF 0.4 Q4 PHYSICS, MULTIDISCIPLINARY Pub Date : 2024-06-13 DOI: 10.3103/s8756699024700353
Suthan Renuka, Chirathally Dyamanna Guruprakash

Abstract

Formal, machine-readable theories, taxonomy definitions, and connections to human-readable language make up ontology, the formal specification of conceptualization. In addition to methodical definitions, it offers axioms that guide the interpretation of words. Many other sorts of relationships, both structural and nonstructural, including inheritance, generalization, aggregation, and instantiation, are supported by an ontology. It is necessary to handle a number of security issues, including identity management, cryptography, trust, application security, authentication, access control, and privacy. Access control is the process of maintaining resource privacy, project-based group membership, and role specificity in accordance with the goals of the ontology under the proposal. This research examines and contrasts three different ontology-based access control strategies: attribute-based access control (ABAC), context-based access control (CBAC), and role-based access control (RBAC). I-RBAC, BRBAC, SA-ODC and RBACSE are the RBAC approaches used for comparison. For analysing the CBAC procedure, ACAIA, CAHMS, CASPSA and FBCAAC algorithms are used. Finally for evaluating the ABAC method, OABAC, FABAC, AWS-IoTAC and ABAC-PHR algorithms are employed. CASPSA, CAHMS, ACAIA and FBCAAC has a data retrieval time of 1.8, 2.4, 6.1, and 9.4 s. IRBAC, BRBAC, SA-ODC and RBACSE has a turn around time of 66.3, 79.1, 150.5, and 177.2 s respectively. According to the experimental results, attribute based access control systems perform better for securing healthcare data.

摘要 正规的、机器可读的理论、分类定义以及与人类可读语言的联系构成了本体,即概念化的正规规范。除了方法定义外,本体论还提供了指导词语解释的公理。本体还支持许多其他类型的关系,包括继承、泛化、聚合和实例化等结构性和非结构性关系。有必要处理一些安全问题,包括身份管理、密码学、信任、应用安全、身份验证、访问控制和隐私。访问控制是根据提案中本体的目标维护资源隐私、基于项目的小组成员资格和角色特定性的过程。本研究考察并对比了三种不同的基于本体的访问控制策略:基于属性的访问控制(ABAC)、基于上下文的访问控制(CBAC)和基于角色的访问控制(RBAC)。I-RBAC、BRBAC、SA-ODC 和 RBACSE 是用于比较的 RBAC 方法。在分析 CBAC 程序时,使用了 ACAIA、CAHMS、CASPSA 和 FBCAAC 算法。最后,为了评估 ABAC 方法,使用了 OABAC、FABAC、AWS-IoTAC 和 ABAC-PHR 算法。CASPSA、CAHMS、ACAIA 和 FBCAAC 的数据检索时间分别为 1.8、2.4、6.1 和 9.4 秒;IRBAC、BRBAC、SA-ODC 和 RBACSE 的周转时间分别为 66.3、79.1、150.5 和 177.2 秒。根据实验结果,基于属性的访问控制系统在确保医疗数据安全方面表现更好。
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引用次数: 0
期刊
Optoelectronics Instrumentation and Data Processing
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