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The W UMa binaries UsNO-A2.0 1350-17365531,V471 Cas,V479 Lac and V560 Lac:light curve solutions and global parameters based on Gaia distances

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Research in Astronomy and Astrophysics 2019年第1期19卷 141-148页

作者： Diana P.Kjurkchieva Velimir A.Popov Yordanka Eneva nikola I.Petrov Department of Physics and Astronomy Shumen University Medical University Institute of Astronomy and NAO Bulgarian Academy of Sciences

We present photometric observations in sloan filters g′, i′of the eclipsing W UMa stars UsNOA2.0 1350-17365531, V471 Cas, V479 Lac and V560 Lac. The sinusoidal-like O-C diagram of V471 Cas indicates the presence of a third body with mass 0.12 M_⊙(a red dwarf) at distance 897 R_⊙. The O-C diagram of V479 Lac reveals a period decrease of d P/dt =-1.69 × 10-6d yr-1. The results of the light curve solutions are:(i) the targets are overcontact binaries with small fill-out factors;(ii) their components are F–K stars, comparable in size, whose temperature differences are below 80 K;(iii) all targets undergo partial eclipses and to limit the possible mass ratios we carried out two-step q-search analysis. The target global parameters(luminosities, radii, masses) were obtained on the basis of their Gaia distances and the results of our light curve solutions. The obtained total mass of V560 Lac turns out to be smaller than the lower mass limit for presently known W UMa binaries of 1.0-1.2 M_⊙, i.e. this target is a peculiar overcontact system.

关键词： binaries:close binaries:eclipsing methods:data analysis stars:fundamental parameters stars:individual(UsNO-A2.0 1350-17365531,V471 Cas,V479 Lac,V560 Lac)

基于小波变换和Retinex结合的遥感图像的薄云去除

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激光杂志 2019年第10期40卷 77-80页

作者：杨晓倩贾振红杨杰 nikola KAsABOV 新疆大学信息科学与工程学院乌鲁木齐830046 上海交通大学图像处理与模式识别研究所上海200240 奥克兰理工大学知识工程与发现研究所新西兰奥克兰1020

去除遥感图像中的薄云是图像处理中的常见难题。为了更好地对存在薄云的遥感图像进行薄云去除,提高薄云遥感图像的地物细节信息的可读性。提出了基于小波变换和单尺度Retinex结合的遥感薄云去除算法,先将遥感薄云图像进行小波分解,对分... 详细信息

去除遥感图像中的薄云是图像处理中的常见难题。为了更好地对存在薄云的遥感图像进行薄云去除,提高薄云遥感图像的地物细节信息的可读性。提出了基于小波变换和单尺度Retinex结合的遥感薄云去除算法,先将遥感薄云图像进行小波分解,对分解的低频薄云部分进行抑制,高频信息部分进行强化,处理后进行小波重建,然后利用单尺度Retinex算法对重建后的遥感图像进行增强处理。最后利用平均灰度值,信息熵,标准差及平均梯度指标进行客观评价分析,结果表明,该方法可以在有效去除薄云的同时增强地面细节信息。

关键词：薄云去除遥感图像小波变换单尺度Retinex

基于组合差异图和FCM聚类的sAR图像变化检测

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激光杂志 2018年第3期39卷 89-93页

作者：周文艳贾振红杨杰 nikola Kasabov 新疆大学信息科学与工程学院乌鲁木齐830046 上海交通大学图像处理与模式识别研究所上海200240 新西兰奥克兰理工大学知识工程与发现研究所新西兰奥克兰1020

在获取图像的变化信息时,差异图类型的单一和差异图的质量均会影响到图像变化检测的结果。为了获取变化信息保留完好的差异图,我们提出基于组合差异图和FCM聚类的非监督变化检测算法。首先利用对数变换算法将图像变换成对数域,并采用Fr... 详细信息

在获取图像的变化信息时,差异图类型的单一和差异图的质量均会影响到图像变化检测的结果。为了获取变化信息保留完好的差异图,我们提出基于组合差异图和FCM聚类的非监督变化检测算法。首先利用对数变换算法将图像变换成对数域,并采用Frost滤波去噪。然后用均值比值法和差值法得到两幅差异图,针对两幅差异图的噪声特点分别进行不同的去噪处理,使用组合差异图的方法得到最终的差异图像。最后利用FCM聚类算法将差异图像分为变化类和非变化类。实验结果表明,该算法具有较高的正确率和检测精度。

关键词：变化检测差异图像对数变换 FCM聚类

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基于圆度判别的生物芯片图像倾斜校正算法

激光杂志 2017年第6期38卷 58-61页

作者：郭治卿贾振红杨杰 nikola Kasabov 新疆大学信息科学与工程学院乌鲁木齐830046 上海交通大学图像处理与模式识别研究所上海200240 新西兰奥克兰理工大学知识工程与发现研究所

针对现有生物芯片荧光图像倾斜校正算法所存在计算速度较慢的问题,本文提出了一种基于圆度判别思想的倾斜校正算法。算法对荧光图像进行预处理,并获取二值图像中类圆形样点对象的轮廓边缘,再根据圆度判断出一行中最接近圆的两个类圆形样... 详细信息

针对现有生物芯片荧光图像倾斜校正算法所存在计算速度较慢的问题,本文提出了一种基于圆度判别思想的倾斜校正算法。算法对荧光图像进行预处理,并获取二值图像中类圆形样点对象的轮廓边缘,再根据圆度判断出一行中最接近圆的两个类圆形样点,取其质心并计算出连接两个质心的直线斜率,从而得出荧光图像的倾斜角度并对其进行校正。实验证明,本文所提出的算法在计算速度上有着明显的提高,尤其在处理大尺寸的荧光图像时,计算时间只有略微增加,校准误差较小,可应用于大量生物芯片荧光图像的校正。

关键词：生物芯片荧光图像倾斜校正圆度判定

MULTIFUNCTIONAL sCREW COMPREssOR ROTORs

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MULTIFUNCTIONAL SCREW COMPRESSOR ROTORS

A PsO-Based Power Allocation strategy for D2D and Ms-NOMA signals in Positioning-Timing-Communication Integration system

第四届压缩机与制冷国际会议

作者： nikola.stosic Ian K.smith Ahmed Kovacevic Centre for Positive Displacement Compressor Technology City University London EC1V OHB U.K. Centre for Positive Displacement Compressor Technology City University London EC1V OHB U.K. Centre for Positive Displacement Compressor Technology City University London EC1V OHB U.K.

＜正＞For many years the authors have been investigating the use of twin screw machines to fulfil both the expansion and compression. One of potential advantages of screw machines over other types of positive displacement machine is their ability to perform both the compression and expansion functions simultaneously, using only one pair of rotors, A further feature is the use of the rotors which seal on both contacting surfaces so that the same profile may be used both for the expander and the compressor sections. By using the same profile for both, the compressor and expander rotors can be machined or ground in a single cutting operation and then separated by machining a parting slot in them on completion of the lobe formation. Moreover, in such a case, by proper location of the machine ports, pressure loads and thereby, mechanical friction losses will be less than if the two functions are performed in separate machines. Fields of application of such machines are replacement of the throttle valve in refrigeration and air conditioning plants, high-pressure application, fuel cells, multistage compression or expansion and, really, any other application where simultaneous compression and expansion are required. One example of such unusual, but convenient application is the compressor capacity control by partial expanding of compressed gas.

关键词： screw Compressor screw Expander Compression and Expansion on one Rotor Pair

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A PSO-Based Power Allocation Strategy for D2D and MS-NOMA Si...

Macedonia Demographic Aging

第十四届中国卫星导航年会

作者： shisheng Dai Lu Yin Wenxiao Ge nikola Djuric Beijing University of Posts and Telecommunications University of Novi sad

The Global Navigation satellite system(GNss) plays a crucial role in providing Positioning, Navigation, and Timing(PNT) services, but its signal is easily blocked indoors, which cannot meet the demand for high-precision positioning and timing in indoor scenarios. To address this issue, we proposed the Multi-scale Non-Orthogonal Multiple Access(Ms-NOMA) integrated signal, which can achieve sub-meter positioning accuracy and nan-meter level time synchronization accuracy while ensuring the Quality of service(Qos) requirement and power budget of communication system. But the existing study did not consider the mutual interference between Device-to-Device(D2D) and MsNOMA signals. Our major contributions are: Firstly, we derive the communication performance of cellular communication users(C-Users), the communication performance of D2D users(D-Users) and the ranging performance of positioning users(P-Users) based on the D2D signals multiplexing Ms-NOMA signals uplink scenario. secondly, we model a power allocation problem that considers Qos requirement and power constraints. Then, we propose a Particle swarm Optimization-Based(PsO-Based) Power Allocation(PsOBPA) strategy which allocates the signal power of the C-Users in the Ms-NOMA signal system and the signal power of D-Users. The numerical results show that our proposed PsOBPA strategy can improve the total system throughput by approximately 15% and the average ranging accuracy by around 4% compared to the average power allocation algorithm with the same bandwidth.

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Journal of Earth science and Engineering 2014年第7期4卷 445-454页

作者： Cane Koteski Dusko Josheski Zlatko jakovlev nikola V. Dimitrov snezana Bardarova Faculty of Tourism and Business Logistics GoceDelchev University of Shtip Gevgelija 1480 Republic of Macedonia

In this paper, it explained the process of demographic aging in Republic of Macedonia. There is relevant information for the gradually process of aging. At the end of the text, there are few charts. Macedonia gained independence in 1991, in the course of transition from planned to market economy, many socio-economic parameters changed： Demography become evident that fertility rate dropped significantly. In the previous 20 years, number of infants born decreased somewhat 5-6 times compared to 1980. Number of divorce grew rapidly. Also, in the Republic of Macedonia, there followed a parallel process of immigration to western countries, especially western Europe, UsA and Australia as well as other countries from the developed world. This migration happened as a result of mainly economic reasons, i.e., countries in which Macedonians migrate have much higher real incomes when compared with Macedonia, and comparatively much higher living standard. One also can find reason for migration in political reasons also, and family reunification. Low fertility is associated with low income and unemployment. People in Macedonia had suffered greatly in transition times with high unemployment, low wages, and corruption, which largely derogated their chances of better future and career and contributed to the demographic aging and low fertility rates.

关键词： The Republic of Macedonia population statistic information demographic aging

维普期刊数据库评论

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数字全息再现的散斑噪声消除和细节保留

激光杂志 2019年第9期40卷 34-37页

作者：任如勇贾振红杨杰 nikola Kasabov 新疆大学信息科学与工程学院乌鲁木齐830046 上海交通大学图像处理与模式识别研究所上海200240 新西兰奥克兰理工大学知识工程与发现研究所新西兰奥克兰1020

数字全息光源的相干性缺点导致了全息再现散斑噪声的产生,严重影响到了全息重建的质量。虽然许多降低数字全息再现图像中散斑噪声的先进算法已经达到了良好的效果,但是在处理图像散斑噪声的过程中模糊了图像的细节,丢失了图像纹理的信... 详细信息

数字全息光源的相干性缺点导致了全息再现散斑噪声的产生,严重影响到了全息重建的质量。虽然许多降低数字全息再现图像中散斑噪声的先进算法已经达到了良好的效果,但是在处理图像散斑噪声的过程中模糊了图像的细节,丢失了图像纹理的信息。为此提出了一种新的方法,结合了引导滤波、图像分割、三维块匹配算法(BM3D)算法的概念。算法很好地实现了全息再现图像背景区域的噪声抑制和信号区域良好的细节保留。得到的全息重建的质量可与用非相干技术所能达到的质量相媲美,带来了良好的视觉效果。

关键词：数字全息引导滤波图像分割三维块匹配算法(BM3D)

基于非下采样shearlet变换与模糊对比度的合成孔径雷达图像增强

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计算机应用 2018年第9期38卷 2701-2705页

作者：郭庆荣贾振红杨杰 nikola KAsABOV 新疆大学信息科学与工程学院乌鲁木齐830046 上海交通大学图像处理与模式识别研究所上海200240 奥克兰理工大学知识工程与发现研究所

针对合成孔径雷达(sAR)图像在成像和传输过程中引入噪声和干扰从而导致图像清晰度下降、细节丢失等问题,提出了一种非下采样shearlet变换(NssT)与模糊对比度的sAR图像增强算法。首先,原始图像经NssT分解成一个低频分量和若干个高频分量... 详细信息

针对合成孔径雷达(sAR)图像在成像和传输过程中引入噪声和干扰从而导致图像清晰度下降、细节丢失等问题,提出了一种非下采样shearlet变换(NssT)与模糊对比度的sAR图像增强算法。首先,原始图像经NssT分解成一个低频分量和若干个高频分量;然后对低频分量进行线性增强以提高整体对比度,对高频分量采用阈值法进行增强以去除图像中的噪声;接着对处理后的两部分分量进行NssT反变换得到重构图像;最后采用模糊对比度算法对重构图像进行增强,提高图像细节信息和层次感,得到增强后的图像。对40幅图像的实验结果表明,与直方图均衡化、多尺度Retinex增强算法、基于shearlet变换和多尺度Retinex的遥感图像增强算法、基于剪切波域改进Gamma校正的医学图像增强算法相比,该算法的图像峰值信噪比至少提升了22.9%,均方根误差至少降低了36.2%,能明显提升图像的清晰度,使图像的纹理信息更加清晰。

关键词：合成孔径雷达图像非下采样shearlet变换阈值去噪模糊对比度