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Optoelectronics Letters 2025年

作者： CUI nan PAN Honggang ZHANG Ailing ZHAO Zihong CHEN Zhipan ZHANG Bo Tianjin Key Laboratory of Film Electronic and Communication Devices， Engineering Research Center of Optoelectronic Devices and Communication Technology， Ministry of Education， School of Integrated Circuit Science and Engineering， Tianjin University of Technology

In this paper， we propose and numerically characterize the optical characteristics of a high sensitivity dual polarization four channels surface plasmon resonance refractive index sensor with wide detection range and high linearity based on photonic crystal fiber （PCF）. Four light transmission channels are constructed by using big air holes. The small rectangular air hole in the center of the fiber core is used to add asymmetry. We use gold plasma material to achieve better sensing performance. A thin film of TiO2is placed on the PCF surface， which assists gold in the adhesion on PCF. The maximum wavelength sensitivity of the sensor can reach 20000 nm/RIU in both x and y polarization modes. While the maximum wavelength resolution of the sensor is 5×10-6RIU. The average wavelength sensitivity reached 15900nm/RIU and 15800nm/RIU in x and y polarization mode. The sensor features R2=0.9969 / R2=0.9966 high linear performance in x and y polarization mode and the maximum FOM values 509.13 RIU-1/ 489.63 RIU-1in x and y polarization mode. Besides the sensor’s detection range is 1.26-1.36， which is a wide refractive index detection range. The sensor has a wide range of applications in biomedical and other fields.

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Deriving the slope-mean shielded astronomical solar radiation spectrum and slope-mean possible sunshine duration spectrum over the Loess Plateau

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Journal of Mountain Science 2020年第1期17卷 133-146页

作者： CHEN nan Key Laboratory of Spatial Data Mining & Information Sharing Ministry of Education Fuzhou University Spatial Information Research Center of Fujian Province Fuzhou University

Solar radiation is often shielded by terrain relief, especially in mountainous areas, before reaching the surface of the Earth. The objective of this paper is to study the spatial structures of the shielded astronomical solar radiation(SASR) and the possible sunshine duration(PSD) over the Loess Plateau. To this end, we chose six test areas representing different landforms over the Loess Plateau and the software package of Matlab was used as the main computing platform. In each test area, 5-m-resolution digital elevation model established from 1:10,000 scale topographic maps was used to compute the corresponding slope, SASR and PSD. Then, we defined the concepts of the slope-mean SASR spectrum and the slope-mean PSD spectrum, and proposed a method to extract them from the computed slope, SASR and PSD over rectangular analysis windows. Using this method, we found both spectrums in a year or in a season for each of the four seasons in the six test areas. Each spectrum was found only when the area of the corresponding rectangular analysis window was greater than the corresponding stable area of the spectrum. The values of the two spectrums decreased when the slope ***, the values of the stable areas of the spectrums in a year or in a season were positively correlated with the variable coefficients of the slope or the profile curvature. The values of the stable areas of the two spectrums in a year or in a season may represent the minimum value of test areas for corresponding future research on the spatial structures of the SASR or PSD. All the findings herein suggest that the spatial structures of the PSD and the SASR are caused by the interactions between solar radiation and terrain relief and that the method for extracting either spectrum is effective for detecting their spatial structures. This study may deepen our understanding of the spatial structure of solar radiation and help us further explore the distribution of solar energy in mountainous re

关键词： Digital elevation model Shielded extraterrestrial solar radiation Spectrum Possible Sunshine duration Slope Loess Plateau

Scale problem:Influence of grid spacing of digital elevation model on computed slope and shielded extra-terrestrial solar radiation

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Frontiers of Earth Science 2020年第1期14卷 171-187页

作者： nan CHEN Key Laboratory of Spatial Data Mining&Information Sharing(Ministry of Education) Fuzhou UniversityFuzhou 350108 China Spatial Information Research Center of Fujian Province Fuzhou UniversityFuzhou 350108 China

Solar radiation is the primary energy source that drives many of Earth’s physical and biological processes and determines the patterns of climate and productivity on the surface of the Earth.A fundamental proportion of solar radiation is composed of shielded extraterrestrial solar radiation(SESR),which can be computed using the slope and aspect derived from a digital elevation model(DEM).The objective of this paper is to determine the influence of the grid spacing of the DEM(the influence of the scale of the DEM)on the errors of slope,aspect and *** paper puts forward the concepts of slope representation error,aspect representation error,and SESR representation error and then studies the relations among these errors and the grid spacing of *** find that when the grid spacing of a DEM becomes coarser,the average SESR increases;the increase in SESR is dominated by the grid cells of the DEM with a negative slope representation error,whereas SESR generally decreases in the grid cells with a positive slope representation *** the grid spacing varies,the distribution of the percentages of positive SESR representation errors on the slope,which is classified into 11 slope intervals,is independent of the grid spacing;this distribution is concentrated across some slope ***,the average absolute value and mean square error of the SESR representation error are closely related to those of the slope representation error and the aspect representation *** findings in this study may be useful for predicting and reducing the errors in SESR measurements and may help to avoid mistakes in foture research and in practical applications in which SESR is the data of interest or plays a vital role in an analysis.

关键词： scale problem digital elevation model grid spacing slope shielded extra-terrestrial solar radiation

A FRAMEWORK FOR REAL-VALUED CIPHER SySTEMS

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Journal of Systems Science & Complexity 2007年第4期20卷 486-491页

作者： Zhaozhi ZHANG nan JIANG Institute of Systems Science Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100080 China College of Computer Science and Technology Beijing University of Technology Beijing 100022 China

Most cipher systems designed thus far are binary-valued or integer-valued cipher systems. Their security relies on the assumption that one-way functions exist. Though the existence of one-way functions has not been proved yet, most cryptographic researchers believe that one-way functions exist. In addition, many candidates for one-way functions have been proposed. Therefore, the key step for developing real-valued cipher systems is to define real one-way functions and to propose candidates for them. In this paper, based on computational complexity theory over the real field, we give two definitions of real one-way functions; one is for digital one-way functions and the other is for general one-way functions. Candidates for these two classes of one-way functions are also proposed. Moreover, we present two examples to demonstrate that the candidates for both digital one-way functions and general one-way functions can be applied to construct secure real-valued cipher systems.

关键词： Computational complexity theory digital one-way function general one-way function real-valued cipher system.

基于深度神经网络的航空叶片表面缺陷检测算法

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光电子·激光 2025年第2期36卷 130-135页

作者：苏宝华张吟龙张男冯选中国航发沈阳黎明航空发动机有限责任公司产品检验检测中心中国科学院沈阳自动化研究所工业控制网络与系统研究室沈阳化工大学信息工程学院

航空叶片表面缺陷的准确检测是保证航空发动机安全可靠运转的关键。目前基于视觉的航空叶片表面缺陷检测算法存在实时性差、漏检率高、定位目标不准等问题。针对上述问题，本文提出一种基于深度神经网络的航空叶片表面缺陷检测算法。为... 详细信息

航空叶片表面缺陷的准确检测是保证航空发动机安全可靠运转的关键。目前基于视觉的航空叶片表面缺陷检测算法存在实时性差、漏检率高、定位目标不准等问题。针对上述问题，本文提出一种基于深度神经网络的航空叶片表面缺陷检测算法。为了提高检测实时性，本文设计了深度可分离卷积(depthwise separable convolution, DSC)模型分解标准卷积；为了降低小目标缺陷漏检，本文设计了SE-PAN (squeeze-and-excitation path aggregation network)模型对每个通道的特征进行重标定，使得具有更强信息的特征得到更多的关注；为了提高定位准确度，本文设计了Focal-DIOU (focal-distance intersection over union)损失函数减弱低效框的作用。在本文的航空叶片表面缺陷数据集上的实验证明：本文算法的Precision、Recall、AP达到了95.7%、94.6%、96.3%,检测帧率达到24帧/s,均优于主流检测算法。

关键词：缺陷检测深度神经网络损失函数注意力模型

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Microfluidic production of liposomes through liquid-liquid phase separation in ternary droplets

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Frontiers of Chemical Science and Engineering 2022年第6期16卷 1017-1022页

作者： Xu-Chun Song Zi-Han Zhou ya-Lan yu nan-nan Deng College of Chemistry and Chemical Engineering Southwest Petroleum UniversityChengdu 610500China School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Liposomes,the self-assembled phospholipid vesicles,have been extensively used in various fields such as artificial cells,drug delivery systems,biosensors and ***,current microfluidic routes to liposomes mostly rely on water-in-oil-in-water double emulsion droplets as templates,and require complex fabrication of microfluidic devices,and tedious manipulation of multiphase *** we present a simple microfluidic approach to preparing monodisperse liposomes from oil-in-water *** demonstration,we used butyl acetate-water-ethanol ternary mixtures as inner phase and an aqueous solution of surfactants as outer phase to make oil-in-water droplets,which can evolve into water-in-oil-in-water double emulsion droplets by liquid-liquid phase separation of ternary ***,the resultant water-in-oil-in-water droplets underwent a dewetting transition to form separated monodisperse liposomes and residual oil droplets,with the assistance of *** method is simple,does not require complex microfluidic devices and tedious manipulation,and provides a new platform for controllable preparation of liposomes.

关键词： microfluidics liposomes ternary droplets phase separation

Effect of Excited and Fourth Generation Leptons in Lepton Flavor Violating μ− → e- 2γ Decay

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Chinese Physics Letters 2011年第8期28卷 51-53页

作者： S.C.İnan Department of Physics Cumhuriyet UniversitySivas 58140Turkey

We study the lepton flavor violatingμ−→e-2γdecay induced by the mediation of heavy leptons,such as the excited and fourth generation *** of these leptons inμ−→e-2γdecay are *** is found that the branching ratio of this decay is very sensitive to excited and fourth generation ***,we obtain the bounds on model parameters by using the current experimental limit of this decay.

关键词： decay excited branching

Dietary exposure to di-isobutyl phthalate increases urinary 5-methyl-2′-deoxycytidine level and affects reproductive function in adult male mice

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Journal of Environmental Sciences 2017年第11期29卷 14-23页

作者： yitao Pan Xiaoyang Wang Leo W.y.yeung nan Sheng Qianqian Cui Ruina Cui Hongxia Zhang Jiayin Dai Key Laboratory of Animal Ecology and Conservation Biology Institute of Zoology Chinese Academy of Sciences Beijing 100101 China University of Chinese Academy of Sciences Beijing 100049 China Man-Technology-Environment Research Centre (MTM) School of Science and Technology Orebro University Orebro SE -70182 Sweden

Phthalates are a large family of ubiquitous environmental pollutants suspected of being endocrine disruptors. Epidemiological studies have associated phthalate metabolites with decreased reproductive parameters and linked phthalate exposure with the level of urinary 5-methyl-2′-deoxycytidine（5mdC, a product of methylated DNA）. In this study, adult male mice were exposed to 450 mg di-isobutyl phthalate（DiBP）/（kg·day） via dietary exposure for 28 days. Mono-isobutyl phthalate（Mi BP, the urinary metabolite） and reproductive function parameters were determined. The levels of 5mdC and 5-hydroxymethyl-2′-deoxycytidine（5hmdC） were measured in urine to evaluate if their contents were also altered by DiBP exposure in this animal model. Results showed that DiBP exposure led to a significant increase in the urinary 5mdC level and significant decreases in sperm concentration and motility in the epididymis, accompanied with reduced testosterone levels and downregulation of the P450 cholesterol side-chain cleavage enzyme（P450scc） gene in the mice testes. Our findings indicated that exposure to DiBP increased the urinary 5mdC levels,which supported our recent epidemiological study about the associations of urinary 5mdC with phthalate exposure in the male human population. In addition, DiBP exposure impaired male reproductive function, possibly by disturbing testosterone levels; P450scc might be a major steroidogenic enzyme targeted by DiBP or other phthalates.

关键词： Di-isobutyl phthalate(DiBP) 'Reproductive function' 5-Methyl-2′-deoxycytidine(5mdC) 'Testosterone 'Deoxyribonucleic acid(DNA) methylation

Regulation of sporopollenin synthesis for pollen wall formation in plant

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Science China(Life Sciences) 2016年第12期59卷 1335-1337页

作者： Zhong-nan yang College of life and environmental sciences Shanghai Normal University

Pollen wall is the most complicated cell wall in plant. It is composed of outer exine and inner intine with the exine fiar- ther divided into sexine and nexine. The composition of in- tine layer is generally considered to be same as a plant cell wall which is mainly composed of cellulose. Nexine layer can only be observed under transmission electron microscope. Recent investigation suggested that the major composition of nexine is arabinogalactan proteins （Jia et al., 2015）.

关键词： pollen cellulose outer

Influence of residual surface stress on the fracture of nanoscale piezoelectric materials with conducting cracks

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Science China(Physics,Mechanics & Astronomy) 2014年第2期57卷 280-285页

作者： nan HaiShun WANG BaoLin Graduate School at Shenzhen Harbin Institute of Technology

In this paper,we analyze the stress and electric field intensity factors affected by residual surface stress for conducting cracks in piezoelectric *** problem is reduced to a system of non-linear singular integral equations,whose solution is determined by iteration *** results indicate that the residual surface stress can significantly alter the crack tip fields at nanometer length *** to the residual surface stress,281he electric field can produce stress around crack *** suggests a strong electromechanical coupling crack tip field for nanoscale piezoelectric *** a finding is considerably different from the classical fracture mechanics results.A transit electric field to stress load ratio is identified,for which influences of residual surface stresses *** research is useful for the applications of nanoscale piezoelectric devices.

关键词： fracture mechanics residual surface stress piezoelectric materials nanomechanics conducting cracks