通讯机构：
[Yang Li; Hao Kan] S;[Junli Yin] H;Hunan Province Key Laboratory for Ultra-Fast Micro/Nano Technology and Advanced Laser Manufacture, School of Electrical Engineering, University of South China, Hengyang 421001, China<&wdkj&>School of Information Science and Engineering, University of Jinan, Jinan 250022, China<&wdkj&>School of Information Science and Engineering, University of Jinan, Jinan 250022, China<&wdkj&>School of Microelectronics, Shandong University, Jinan 250101, China
作者机构：
[Lei, Zeyong; Deng, Jian; Lei, ZY; Zhong, Lin] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Wang, Guolong; Deng, Jian] Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.;[Lei, Jieheng] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;[Zhao, Mu] China Nucl Ind 24 Construct Co Ltd, Beijing 102400, Peoples R China.
通讯机构：
[Lei, ZY ] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
关键词：
304SS;cobalt;deposition;spinel;primary loop
摘要：
The radioactive corrosion products (58)Co and (60)Co in the primary loops of pressurized water reactors (PWRs) are the main sources of radiation doses to which workers in nuclear power plants are exposed. To understand cobalt deposition on 304 stainless steel (304SS), which is the main structural material used in the primary loop, the microstructural characteristics and chemical composition of a 304SS surface layer immersed for 240 h in borated and lithiated high-temperature water containing cobalt were investigated with scanning electron microscopy (SEM), X-ray diffraction (XRD), laser Raman spectroscopy (LRS), X-ray photoelectron spectroscopy (XPS), glow discharge optical emission spectrometry (GD-OES), and inductively coupled plasma emission mass spectrometry (ICP-MS). The results showed that two distinct cobalt deposition layers (an outer layer of CoFe(2)O(4) and an inner layer of CoCr(2)O(4)) were formed on the 304SS after 240 h of immersion. Further research showed that CoFe(2)O(4) was formed on the metal surface by coprecipitation of the iron preferentially dissolved from the 304SS surface with cobalt ions from the solution. The CoCr(2)O(4) was formed by ion exchange between the cobalt ions entering the metal inner oxide layer and (Fe, Ni) Cr(2)O(4). These results are useful in understanding cobalt deposition on 304SS and have a certain reference value for exploring the deposition behavior and mechanism of radionuclide cobalt on 304SS in the PWR primary loop water environment.
通讯机构：
[Wenjing Yue; Yang Li] S;School of Information Science and Engineering, University of Jinan, Jinan, 250022, China<&wdkj&>Shandong Provincial Key Laboratory of Network Based Intelligent Computing, University of Jinan, Jinan, 250022, China<&wdkj&>School of Information Science and Engineering, University of Jinan, Jinan, 250022, China<&wdkj&>Shandong Provincial Key Laboratory of Network Based Intelligent Computing, University of Jinan, Jinan, 250022, China<&wdkj&>School of Microelectronics, Shandong University, Jinan, 250100, China
关键词：
Health monitoring;Multifunctional flexible sensor;Nanofiber;Pressure sensing;Temperature sensing
摘要：
Flexible multifunctional sensor with excellent performance via unsophisticated fabrication method is impera-tively anticipated for the development of smart human health monitoring systems and wearable electronic de-vices. Here, we report a multilayer dual-mode flexible sensor (DMFS) by integrating different sensing layers on the two sides of a flexible dielectric substrate for sensing pressure and temperature. The introduction of elastic nanofiber skeleton structure and internal "sea urchin" like conductive materials is the top priority for the DMFS to have excellent sensing performance and durability. As a result, the fabricated DMFS ultimately shows excellent pressure sensitivity of 111.96 kPa-1 within a wide sensing range up to 70 kPa. In the case of temperature stimulus, the DMFS accomplishes a high, linear response to the ambient temperature variation within the range from 20 degrees C to 50 degrees C, while maintaining high stability and durability after long-term bending cycles. In addition, DMFS reveals its great potential for non-contact dynamic temperature measurement by being integrated into an intelligent temperature monitoring system. Most importantly, a novel smart human health-monitoring system, which attributes to the coordination and common work of multiple DMFS, has been developed and realizes simultaneous detection of multiple physiological signals of human beings in real-time.
作者机构：
[Jiang, Shangting; Li, Ye; Wang, Xinlin] School of Nuclear Science and Technology, University of South China, No. 28, Changsheng West Road, Hunan, Hengyang;421001, China;[Chen, Zhiyong; Zhu, Weihua; Wu, Qinmao; He, Hongyu] Hunan Province Key Laboratory for Ultra-Fast Micro/Nano Technology and Advanced Laser Manufacture, School of Electrical Engineering, University of South China, No. 28, Changsheng West Road, Hunan, Hengyang;[Jiang, Shangting; Li, Ye; Chen, Zhiyong; Zhu, Weihua; Wu, Qinmao; He, Hongyu; Wang, Xinlin] 421001, China;[Wang, Xinlin] 421001, China<&wdkj&>Hunan Province Key Laboratory for Ultra-Fast Micro/Nano Technology and Advanced Laser Manufacture, School of Electrical Engineering, University of South China, No. 28, Changsheng West Road, Hunan, Hengyang
通讯机构：
[Ye Li; Xinlin Wang] S;School of Nuclear Science and Technology, University of South China , No. 28, Changsheng West Road, Hengyang City, Hunan 421001, China
作者：
Pang, Lihui;Tang, Yilong;Tan, Qingyi;Liu, Yulang;Yang, Bin
期刊：
EURASIP JOURNAL ON ADVANCES IN SIGNAL PROCESSING,2022年2022(1):1-25 ISSN：1687-6180
通讯作者：
Pang, Lihui(sunshine.plh@hotmail.com)
作者机构：
[Tan, Qingyi; Tang, Yilong; Yang, Bin; Pang, Lihui; Liu, Yulang] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.;[Pang, Lihui] Sungkyunkwan Univ, Dept Software, Suwon 440746, South Korea.
通讯机构：
[Lihui Pang] S;School of Electrical Engineering, University of South China, Hengyang, China<&wdkj&>Department of Software, Sungkyunkwan University, Suwon, South Korea
关键词：
Blind signal separation;Kernel density estimation;Maximum likelihood estimation;Neural networks;Time–frequency overlapped signal
摘要：
The blind signal separation (BSS) algorithm obtains each original/source signal from the observed signal collected by the receiving antenna or sensor. Objective/loss/cost function and optimization method are two key parts of BSS algorithm. Modifying the objective function and optimization from the perspective of neural network (NN) is a novel concept in BSS domain.
$$L_2$$
regularization is adopted as a term of maximum likelihood estimation (MLE)-based objective function like in Liu et al.(Sensors 21(3):973, 2021); however, we modified the probability density function (PDF) term of the objective function and used the kernel density estimation method for time–frequency overlapped digital communication signal. Multiple optimizers are studied in this paper, and we figure out the right optimizer for our application scenario. A varies of comparison experiments—whoseseparation results will be providedinforms of correlation coefficient and performance index—are carried out, which indicate our method can converge quickly and achieve satisfactory separation results with performance index (PI) lower than 0.02 when signal-to-noise ratio (SNR) no less than 10dB. Additionally, it demonstrates performance of our method is better than that of typical separation—FastICA, especially for the lower SNR environment, and it shows that our method is not sensitive to the frequency overlap level (FOL) of the source signal, even FOL as high as
$$100\%$$
; it still can get high-precision separation results with
$$\textrm{PI}<0.02$$
.
通讯机构：
[Peng Chen; Fei Liu] P;[Shuang-Feng Yin] S;State Key Laboratory of Chemo/Biosensing and Chemometrics, Provincial Hunan Key Laboratory for Cost-effective Utilization of Fossil Fuel Aimed at Reducing Carbon-dioxide Emissions, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, Hunan, China<&wdkj&>Provincial Guizhou Key Laboratory of Green Chemical and Clean Energy Technology, School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, China
作者机构：
[Wang, F. D.; Wan, S. K.; Bin, B.; Li, Y. C.; Zhang, H. M.; Lyu, B.; He, L.; Fu, J.] Chinese Acad Sci, Inst Plasma Phys, HFIPS, Hefei 230031, Peoples R China.;[Wan, S. K.; Bin, B.; Li, Y. C.; He, L.] Univ Sci & Technol China, Sci Isl Branch, Grad Sch, Hefei 230026, Peoples R China.;[Shen, Y. C.] Hefei Normal Univ, Hefei 230601, Peoples R China.;[Li, C. Y.; Yang, W. C.] Anhui Spectreat Instrument Co Ltd, Hefei 230088, Peoples R China.;[Du, X. W.; Wang, Q. P.] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Peoples R China.
通讯机构：
[H. M. Zhang; B. Lyu] I;Institute of Plasma Physics, HFIPS, Chinese Academy of Sciences , Hefei 230031, China
摘要：
The impurity radiation from the divertor region of the EAST tokamak is dominantly in the wavelength range of vacuum ultraviolet (VUV) due to the elevated edge electron temperature. A space-resolved VUV spectroscopy is developed to measure impurity radiation in the divertor region. An eagle-type VUV spectrometer with a focal length of 1 m is adopted in this system, equipped with a spherical grating and a charged-coupled device (CCD) detector. The performance of the VUV spectrometer is preliminarily tested on a synchrotron radiation facility. The wavelength calibration is conducted near 65 nm. It is found that the wavelength range observed by the CCD detector is about 11.07 nm around the central wavelength of about 65 nm. With a linear dispersion of 0.0053 nm/pixel, it is possible to measure the ion temperature lower than 20 eV at the edge region by analyzing the Doppler broadening of a carbon line. These test results show that the performance of the VUV spectrometer is capable of measuring divertor radiation and analyzing the ion temperature of edge impurity ions.
期刊：
Applied Radiation and Isotopes,2021年174:109712 ISSN：0969-8043
通讯作者：
Lei, Lin(xlinw@126.com)
作者机构：
[Lei, JieHeng] Univ South China, Sch Elect Engn, Hengyang 421001, Hunan, Peoples R China.;[Lei, Lin] Univ South China, Sch Resources & Environm & Safety Engn, Hengyang 421001, Hunan, Peoples R China.;[Yin, Zeyuan; Lei, ZeYong; Qin, QianQian] Univ South China, Sch Mech Engn, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Lin Lei] S;School of Resources & Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan province, China
关键词：
Gamma radiation measurement;Uranium fluoride;Materials level;Algorithms of gamma radiation field
摘要：
The measurement of material level change in uranium fluorination has an essential influence on uranium production quality. In this study, a method to determine the level change of uranium fluorination mixture in the hopper by online radiation meter outside hopper is established. We have designed an experiment to study the change of radiation field outside the hopper with a known height of radioactive material to discover its regular pattern. The experimental results show that when the probe is placed 50 mm away from the cylinder wall, the average radiation dose is more significant, and the change of radiation dose measured by the instrument at this position is more evident than that at other positions. Then through the measurement of the external radiation field of the hopper with unknown material level to estimate the material level, and by opening the cover of hopper to verify the accuracy of the material level measurement method. Based on the experimental results and theoretical analysis, a method and formula for judging the mixture material are proposed. This method can quickly determine the level of uranium fluoride mixture in the hopper online, realize the accurate control of material parameters in the process of uranium conversion, and improve the quality of uranium conversion products.
作者机构：
[屈星; 盛义发; 苏泽光; 赵宇红] School of Electrical Engineering, University of South China, Hengyang;Hunan Province;421001, China;[李欣然] School of Electrical and Information Engineering, Hunan University, Changsha;410082, China
通讯机构：
School of Electrical Engineering, University of South China, Hengyang, Hunan Province, China
作者机构：
[屈星; 盛义发; 肖金凤; 徐祖华] School of Electrical Engineering, University of South China, Hengyang;421001, China;[李欣然] School of Electrical and Information Engineering, Hunan University, Changsha;410082, China;[屈星; 盛义发; 肖金凤; 徐祖华] 421001, China
通讯机构：
[Qu, X.] S;School of Electrical Engineering, University of South China, Hengyang, China
关键词：
负荷建模;电池储能系统;广义负荷;广义综合负荷模型;电力系统
摘要：
针对含电池储能系统(batter energy storage system,BESS)的配电网参与电网仿真所需的广义综合负荷模型展开研究。阐述了BESS的仿真数学模型,搭建了基于MATLAB/Simulink的BESS仿真平台;通过对BESS暂态运行特性的仿真分析,提出了一种面向负荷的BESS等效模型并进行了检验;建立了考虑BESS的配电网广义综合负荷模型,该广义综合负荷模型由BESS等效模型和经典综合负荷模型(composite load model,CLM)并联构成;通过多场景的仿真分析,检验了提出的广义综合负荷模型的有效性和模型参数稳定性。
作者机构：
[欧阳宏志; 姚学玲; 陈景亮] State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an;710049, China;School of Electrical Engineering, University of South China, Hengyang;421001, China;[欧阳宏志] 710049, China<&wdkj&>School of Electrical Engineering, University of South China, Hengyang
通讯机构：
[Yao, X.] S;State Key Laboratory of Electrical Insulation and Power Equipment, China
作者机构：
[屈星; 盛义发; 肖金凤; 文娟; 邓攀] School of Electrical Engineering, University of South China, Hengyang;Hunan;421001, China;[李欣然] School of Electrical and Information Engineering, Hunan University, Changsha;410082, China
