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2018 IEEE 38th International Conference on Electronics and Nanotechnology (ELNANO)最新文献

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Simulation of the Temperature Distribution with High-Frequency Electrosurgical Heating 高频电刀加热温度分布的模拟
Pub Date : 2018-04-01 DOI: 10.1109/ELNANO.2018.8477555
A. Dubko, V. Sydorets, Oleksandr F. Bondarenko
In the given study, an algorithm for solving the two-dimensional stationary heat conduction problem in a two-phase medium (electrode – biological tissue) is developed with boundary conditions of the first and second types. In the study, the unequal distribution of alternating current in these conducting media (so-called skin-effect) is taken into account. In Cartesian coordinate system a geometrical model of a two-phase medium consisting of rectangular copper electrode and rectangular sample of biological tissue is considered. A model of such kind allowed us to reduce the problem to a plane-parallel case. A numerical experiment is implemented in MATLAB environment, using the finite difference method. To solve the problem of heat transfer, the electromagnetic problem is solved in the first place. As a result, the temperature distribution in a two-phase medium cooled by physiological saline during the flow of high-frequency current is simulated. The model showed that the surfaces of the electrodes and the biological tissue in contact with them do not overheat, and the maximal temperature value lies in the depth of the tissue. This model can be used to study thermal processes during high-frequency surgical intrusion with a tool having rectangular electrodes, in a wide frequency range.
本文提出了一种求解两相介质(电极-生物组织)中二维稳态热传导问题的算法,该算法具有第一类和第二类边界条件。在研究中,考虑了这些导电介质中交流电的不均匀分布(所谓的趋肤效应)。在直角坐标系下,考虑了由矩形铜电极和矩形生物组织样品组成的两相介质的几何模型。这种模型使我们能够把问题简化为平面平行的情况。利用有限差分法在MATLAB环境下进行了数值实验。要解决传热问题,首先要解决电磁问题。模拟了经生理盐水冷却的两相介质在高频电流作用下的温度分布。模型表明,电极表面和与电极接触的生物组织表面不存在过热现象,最大温量值存在于组织深处。该模型可用于研究矩形电极工具在宽频率范围内的高频手术侵入过程中的热过程。
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引用次数: 3
Glucose Minimal Concentration Limit Determination Using Waveguide-Differential Dielectrometer at Microwaves 微波波导差分介电计测定葡萄糖最低浓度极限
Pub Date : 2018-04-01 DOI: 10.1109/ELNANO.2018.8477507
K. Kuznetsova, Z. Eremenko, A. I. Shubnyi, V. Glamazdin, N. Sklyar
Minimal glucose concentration limit in water solution using dielectrometry method was determined at microwave frequency. The complex permittivity of water-glucose solutions measurements were carried out using a designed waveguide-differential dielectrometer. It allows us the real-time determination of the pharmaceutical ingredients existence in water solution by measuring the wave phase and amplitudes differences in a dielectrometer differential measurement cavity. Minimal glucose concentration limits in water solution are 0.28% and 0.059% have been obtained using the values of measured phase and amplitude differences, respectively. Using these values we have obtained the minimum concentration limit of glucose in the water solution as 1.5 and 0.33 mmol/l, respectively. These results can be compared with known high-cost methods. The waveguide-differential dielectrometer can be applied for the determination of the complex permittivity of any water solutions, for example, water-glucose solutions at microwaves that allow us to find out physical parameters of the liquid under test.
在微波频率下用介电法测定了水溶液中葡萄糖的最低浓度。采用设计的波导差分介电计测量了水-葡萄糖溶液的复介电常数。它允许我们通过测量介电计差分测量腔中的波相和振幅差来实时测定水溶液中存在的药物成分。用测得的相位差值和振幅差值分别得到了水溶液中葡萄糖的最低浓度限为0.28%和0.059%。利用这些值,我们得到了水溶液中葡萄糖的最低浓度分别为1.5和0.33 mmol/l。这些结果可以与已知的高成本方法进行比较。波导差分介电计可用于测定任何水溶液的复介电常数,例如,微波下的水-葡萄糖溶液,使我们能够找出被测液体的物理参数。
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引用次数: 4
Automated System for Subjective Evaluation of the Ukrainian Speech Intelligibility 乌克兰语语音可理解性主观评价自动化系统
Pub Date : 2018-04-01 DOI: 10.1109/ELNANO.2018.8477568
A. Prodeus, K. Bukhta, P. Morozko, O. Serhiienko, I. Kotvytskyi, I. Shherbenko
In this paper, a prototype of an automated system for subjective evaluation of intelligibility of the Ukrainian speech in communication channels is proposed. The structure of this system includes nine articulation tables of speech monosyllables of consonant-vowel-consonant (CVC) type and a set of computer programs that allow automating most of the stages of articulation test. Examination of the proposed automated system proved its efficiency and satisfactory consistency with literature data. At the same time, when testing the developed software, several interesting phenomena were discovered. First, when listening, by some people, to noisy and reverberated signals in rooms through acoustic monitors, speech intelligibility turned out to be abnormally high, reaching 80-94% for a signal-to-noise ratio of minus 10 dB and a reverberation time of 2.7 seconds. Secondly, the masking properties of white noise were more pronounced for small signal-to-noise ratios, rather than what was predicted in some literary sources. Nevertheless, the developed software as a whole can be considered as suitable for communication channels acoustic testing. After certain upgrade, the system can be used for acoustic examination of rooms too.
本文提出了一种乌克兰语语音可理解度主观评价自动化系统的原型。该系统的结构包括九个辅音-元音-辅音(CVC)型语音单音节发音表和一套计算机程序,使发音测试的大部分阶段自动化。对所提出的自动化系统进行了测试,证明了该系统的有效性和与文献数据的一致性。同时,在对开发的软件进行测试时,发现了几个有趣的现象。首先,当一些人通过声学监测器聆听房间里嘈杂和混响的信号时,语音清晰度异常高,在信噪比为- 10 dB、混响时间为2.7秒的情况下,语音清晰度达到80-94%。其次,白噪声的掩蔽特性在较小的信噪比下更为明显,而不是在一些文献中预测的那样。尽管如此,所开发的软件总体上可以认为适合于通信信道声学测试。经过一定的升级,该系统也可以用于房间的声学检查。
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引用次数: 9
Analysis of Stabilograms of Healthy Human Using Time and Frequency Characteristics 健康人稳定图的时频特性分析
Pub Date : 2018-04-01 DOI: 10.1109/ELNANO.2018.8477558
B. Kolomiiets, A. Popov
Static computer posturography method was used in this work together with stability posture tests to evaluate person's ability to maintain balance. Stabilogram, the curve reflecting the change of person's Center of Pressure (COP) location during balance maintenance, which results in three variables that depend on time - COP point ($boldsymbol{x}, boldsymbol{y}$ coordinates) and force applied to that point, was measured during six tasks. For each next task, part of a biological systems that participate in maintaining balance was excluded (visual system first, then proprioception system, then both). COP parameters were obtained in two domains: time (mean and standard deviation of normalized COP coordinates in sagittal and frontal plane, mean and standard deviation of module of normalized COP speed in sagittal and frontal plane, mean and standard deviation of module of normalized COP acceleration in sagittal and frontal plane) and frequency (spectral density power ratio in four frequency ranges: [0; 0.5], [0.5; 1], [1; 1.5], [1.5; 4] Hz for the frontal and sagittal planes). It was found that decrease of posture stability leads to increase of the frequency and amplitude of the COP fluctuations and spectral power is redistributed from low to the higher frequencies. Also, frequency and amplitude of the COP projection in the frontal plane is growing faster than in the sagittal, so instability in the frontal plane is larger due to less contact area of the foot with the supporting surface.
本研究采用静态计算机体位学方法,结合稳定性体位测试来评价人体保持平衡的能力。稳定图,反映人的压力中心(COP)位置在平衡维持过程中的变化曲线,它导致三个变量依赖于时间- COP点($boldsymbol{x}, boldsymbol{y}$坐标)和施加在该点上的力,在六个任务中测量。对于下一个任务,参与维持平衡的部分生物系统被排除在外(首先是视觉系统,然后是本体感觉系统,然后是两者)。在时间(矢状面和正面归一化COP坐标均值和标准差、矢状面和正面归一化COP速度模均值和标准差、矢状面和正面归一化COP加速度模均值和标准差)和频率(四个频率范围内的谱密度功率比:[0;0.5], [0.5;1]、[1;1.5], [1.5;[4]前额和矢状面为Hz)。研究发现,姿态稳定性的降低导致COP波动的频率和幅度增加,频谱功率从低频向高频重新分布。此外,COP在额面投射的频率和幅度比矢状面增长更快,因此由于足部与支撑面接触面积较少,额面不稳定性更大。
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引用次数: 1
Dynamics of Physiological Responses During Long Distance Run: Modelling 长跑时生理反应的动力学:建模
Pub Date : 2018-04-01 DOI: 10.1109/ELNANO.2018.8477470
V. Hrytsenko, A. Nikolaienko, Y. Solopchuk, I. Yermakova, Michael Regan
Long-distance races are regularly held around the world regardless of weather conditions. Running under hot environmental conditions can be associated with health risks for the runner, such as hyperthermia and dehydration. This study examines air temperature impact on physiological state during a run. Developed computer simulator predicts the dynamics of body temperatures, water loss, heat flows, blood flow, and other runner's parameters throughout a race. The analysis of modelling results has shown that within air temperature range of 16 to 24 °C there is no hyperthermia hazard to the runner, only due to enhanced sweating followed by water evaporation from the body surface. The higher air temperature, the more fluid has to be spent on the cooling of runner's body. Proposed computer model allows for quantitative assessment of the dependency of runner's thermophysiological parameters on environment temperature. Based on these data, the computer simulator provides relevant recommendations.
无论天气如何,世界各地都会定期举行长跑比赛。在炎热的环境条件下跑步可能会给跑步者带来健康风险,比如体温过高和脱水。本研究考察了空气温度对跑步时生理状态的影响。开发的计算机模拟器预测整个比赛过程中体温、水分流失、热量流动、血液流动和其他跑步者参数的动态变化。对模拟结果的分析表明,在16 ~ 24℃的空气温度范围内,对跑步者没有热休克的危险,只是由于出汗增加,随后水分从体表蒸发。空气温度越高,需要消耗越多的液体来冷却跑步者的身体。提出的计算机模型可以定量评估跑步者的热生理参数对环境温度的依赖性。基于这些数据,计算机模拟器给出了相关的建议。
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引用次数: 0
Calculation of the Height-Time Dependence of the Electron Density of the Ionospheric Plasma Under Instability of the Incoherent Scatter Radar Constant 非相干散射雷达常数不稳定条件下电离层等离子体电子密度随时间变化的计算
Pub Date : 2018-04-01 DOI: 10.1109/ELNANO.2018.8477544
M. Shulha, K. Aksonova, Ihor Shnitsar, V. Pulyayev
Methodological features of calculation the electron density of the ionospheric plasma using the critical frequency (frequency of reflection from the maximum of the ionospheric F2 layer). To obtain the critical frequency using the incoherent scatter radar constant, the level of background noise at its antenna input is analyzed.
利用临界频率(电离层F2层最大反射频率)计算电离层等离子体电子密度的方法特点。为了利用非相干散射雷达常数获得临界频率,分析了其天线输入处的背景噪声水平。
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引用次数: 0
Newbom Hearing Screening Based on the Formula for the Middle Ear Norm Parameter 基于中耳范数参数公式的新生儿听力筛查
Pub Date : 2018-04-01 DOI: 10.1109/ELNANO.2018.8477495
S. Naida, O. Pavlenko
Formulas for hearing diagnosing and audiometry are considered based on the formula for middle ear norm parameter by means of existing multifrequency tympanometers. It was found that in cases when children have normal middle ear condition, the volume of the outer acoustic meatus is equal to the equivalent volume of the ear at the resonance frequency, which allows determining the norm parameter and the volume of the tympanum even with a single-frequency tympanometer. It is shown that the oscillation amplitude of the auditory sensitivity threshold for acoustic pressure at the resonance frequency is equal to the quality of the middle ear. This represents a new diagnostic technique at the functional (reversible) level. A simple technique for diagnosing hearing of newborns based on the genetic relationship between the formants of sound “a” and the resonant frequency of the middle ear is proposed.
在现有多频鼓室计计算中耳范数参数公式的基础上,考虑了听力诊断和测听的公式。研究发现,在儿童中耳状况正常的情况下,外耳道的体积等于耳朵在共振频率下的等效体积,即使使用单频鼓室计也可以确定规范参数和鼓室的体积。结果表明,在共振频率处,声压听觉灵敏度阈值的振荡幅度等于中耳的质量。这代表了在功能(可逆)水平上的一种新的诊断技术。提出了一种基于“A”音的共振峰与中耳共振频率之间的遗传关系来诊断新生儿听力的简单方法。
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引用次数: 5
Heat Transfer Analysis for Quarter-Wave Helicon Isolator with Cooling Substrate 带冷却基板的四分之一波螺旋隔离器的传热分析
Pub Date : 2018-04-01 DOI: 10.1109/ELNANO.2018.8477561
Youry V. Vountesmery
The heat transfer problem and related power limitation problem for the helicon isolators has been investigated. The heat dissipation from a crystal of a quarter-wave helicon resonator with unilateral metallization was discussed. A construction of the heat-conducting substrate for the quarter-wave helicon resonator was proposed. Simulation of the heat transfer and the maximum dissipation power estimation were submitted.
研究了螺旋型隔振器的传热问题及相关的功率限制问题。讨论了单向金属化四分之一波螺旋谐振腔晶体的散热问题。提出了一种用于四分之一波螺旋谐振器的导热衬底结构。并进行了传热模拟和最大耗散功率估算。
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引用次数: 0
The Influence of Diamagnetic Ions to Features of Crystalline and Magnetic Structures of BaFe11.9M0.1O19($text{M}= text{In}$ and Sc) 抗磁性离子对BaFe11.9M0.1O19($text{M}= text{In}$ and Sc)晶体和磁性结构特征的影响
Pub Date : 2018-04-01 DOI: 10.1109/ELNANO.2018.8477476
V. Turchenko, A. Doroshkevich, A. Trukhanov, S. Sumnikov, S. Trukhanov
The features of crystalline and magnetic structure of solid solution of barium ferrite BaFe11.9M0.1O19 (where M= In and Sc) with neutron diffraction method was studied. The substitution of Fe by In ions leads to increase of volume of unit cell while replacing with Sc ions insignificantly change the lattice parameters. The behavior of magnetic structure and unit cell parameters and atomic coordinates has been refined in a broad range of ambient temperature. The refinement of the magnetic structure was carried out within the framework of Gorter's model. The microstructural parameters of solid solutions BaFe12-xMxO19 (M= In and Sc) were determined by the high-resolution neutron diffraction method.
用中子衍射法研究了钡铁氧体BaFe11.9M0.1O19 (M= In和Sc)固溶体的晶体和磁性结构特征。In离子取代Fe离子使晶胞体积增大,而Sc离子取代Fe离子对晶格参数的影响不大。在较宽的环境温度范围内,磁性结构、单体胞参数和原子坐标的行为得到了细化。磁结构的细化是在Gorter模型的框架内进行的。采用高分辨中子衍射法测定了固溶体BaFe12-xMxO19 (M= In和Sc)的显微结构参数。
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引用次数: 0
Comparison Analysis of Biclustering Algorithms with the use of Artificial Data and Gene Expression Profiles 使用人工数据和基因表达谱的双聚类算法的比较分析
Pub Date : 2018-04-01 DOI: 10.1109/ELNANO.2018.8477439
S. Babichev, V. Osypenko, V. Lytvynenko, M. Voronenko, M. Korobchynskyi
The paper presents the research concerning comparison analysis of biclustering algorithms effectiveness with the use of artificial data and gene expression profiles. Internal biclustering quality criterion is proposed as the result of the simulation. The change of this criterion has high correlation with Jaccard index, which was calculated for perfect and obtained biclustering. The technology of bicluster analysis based on “ensemble” method was proposed as the structural block-chart of step-by-step information processing to determine the optimal biclustering level using internal biclustering quality criterion.
本文介绍了利用人工数据和基因表达谱对双聚类算法有效性进行比较分析的研究。根据仿真结果,提出了内部双聚类质量准则。该准则的变化与Jaccard指数有较高的相关性,对Jaccard指数进行了优化计算,得到了双聚类。提出了基于“集成”方法的双聚类分析技术,作为分步信息处理的结构框图,利用内部双聚类质量准则确定最优的双聚类水平。
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引用次数: 10
期刊
2018 IEEE 38th International Conference on Electronics and Nanotechnology (ELNANO)
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