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Photonics Research 2024年第2期12卷 356-368页

作者： huan yuan ZHEQIANG ZHONG BIN ZHANG College of Electronics and Information Engineering Sichuan UniversityChengdu 610064China Big Data Analysis and Fusion Application Technology Engineering Laboratory of Sichuan Province Chengdu 610065China

Janus metasurface holography with asymmetric transmission characteristics provides new degrees of freedom for multiplexing technologies.However,earlier metasurfaces with asymmetrical transmission faced limitations in terms of tunability and multifunctionality.In this study,we propose a metasurface color holographic encryption scheme with dynamic switching and asymmetric transmission at visible frequencies using a low-loss nonvolatile optical phase-change material,Sb_(2)S_(3).Using a modified holographic optimization strategy,we achieved highfidelity asymmetric holographic imaging of a nanostructured metasurface.By controlling the incident direction and wavelength of visible light,as well as the level of crystallization of Sb_(2)S_(3),this reconfigurable metasurface enables the precise manipulation of tunable color holographic image displays.In particular,in the semi-crystalline state of Sb_(2)S_(3),the encoded information can be securely encrypted using a two-channel color-holographic image,whereas only a preset camouflaged image is displayed in the crystalline or amorphous state of Sb_(2)S_(3).The proposed multiencrypted Janus metasurface provides a potential approach for dynamic holographic displays with ultrahigh capacity,holographic encryption,and information storage.

关键词： holographic asymmetric visible

A regression approach for seismic first-break picking

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Petroleum Science 2024年第3期21卷 1584-1596页

作者： huan yuan San-Yi yuan Jie Wu Wen-Jing Sang Yu-He Zhao CNPC Key Laboratory of Geophysical Exploration China University of Petroleum (Beijing) Research Institute of Petroleum Exploration & Development—Northwest (NWGI) Key Laboratory of reservoir characterization of CNPCPetroChina

The picking efficiency of seismic first breaks(FBs) has been greatly accelerated by deep learning(DL)technology. However, the picking accuracy and efficiency of DL methods still face huge challenges in low signal-to-noise ratio(SNR) situations. To address this issue, we propose a regression approach to pick FBs based on bidirectional long short-term memory(Bi LSTM) neural network by learning the implicit Eikonal equation of 3D inhomogeneous media with rugged topography in the target region. We employ a regressive model that represents the relationships among the elevation of shots, offset and the elevation of receivers with their seismic traveltime to predict the unknown FBs, from common-shot gathers with sparsely distributed traces. Different from image segmentation methods which automatically extract image features and classify FBs from seismic data, the proposed method can learn the inner relationship between field geometry and FBs. In addition, the predicted results by the regressive model are continuous values of FBs rather than the discrete ones of the binary distribution. The picking results of synthetic data shows that the proposed method has low dependence on label data, and can obtain reliable and similar predicted results using two types of label data with large differences. The picking results of9380 shots for 3D seismic data generated by vibroseis indicate that the proposed method can still accurately predict FBs in low SNR data. The subsequent stacked profiles further illustrate the reliability and effectiveness of the proposed method. The results of model data and field seismic data demonstrate that the proposed regression method is a robust first-break picker with high potential for field application.

关键词： First-break picking Low signal-to-noise ratio Regression BiLSTM Traveltime Geometry Noisy seismic data

Research on vibration energy harvesting technology of power equipment based on alternating magnet array

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High Voltage 2024年第2期9卷 336-345页

作者： Pinlei Lv Chengyu Fan Aijun Yang huan yuan Jifeng Chu Mingzhe Rong Xiaohua Wang State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong UniversityXi'anChina State Grid Sichuan Electric Power Research Institute ChengduChina

Vibration with a frequency of 100 Hz is widely distributed in the power equipment,and it can provide a new way to supply energy for sensors by vibration energy harvesting.The vibration energy harvesting method based on electromagnetic induction principle was studied through the arrayed structure of magnets and coils.Static magnetic field models were established for four magnet array structures and it was found that the alternating magnet array has the largest magnetic flux and magnetic flux gradient.Based on the alternating magnet array,prototypes of energy harvester with vertical and parallel movement mode were proposed.Through structural parameter optimisation analysis,two different energy harvesters were fabricated and it was found that the energy harvester with a parallel movement mode has better output performances.The energy harvester could provide output voltage/current and power of 8.35 V/17.39 mA and 15.13 mW(matched resistance is 200Ω)at an acceleration of 5 m⋅s^(-2).The 100 mF capacitor could be charged to 2.72 V within 300 s,and the final voltage of the capacitor is greater than 3 V,which could sustainably drive commercial wireless temperature/humidity sensors.

关键词： power energy alternating

Mitogenome-based phylogeny of mosquitoes(Diptera:Culicidae)

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Insect Science 2024年第2期31卷 599-612页

作者： De-Hong Chen Shu-Lin He Wen-Bo Fu Zhen-Tian Yan Yun-Jian Hu huan yuan Ming-Bin Wang Bin Chen Chongqing Key Laboratory of Vector Insects Institute of Entomology and Molecular BiologyChongqing Normal UniversityChongqingChina

Mosquitoes are of great medical significance as vectors of many deadly diseases.Mitogenomes have been widely used in phylogenetic studies,but mitogenome knowledge within the family Culicidae is limited,and Culicidae phylogeny is far from resolved.In this study,we surveyed the mitogenomes of 149 Culicidae species,including 7 newly sequenced species.Comparative analysis of 149 mosquito mitogenomes shows gene composition and order to be identical to that of an ancestral insect,and the AT bias,length variation,and codon usage are all consistent with that of other reported Dipteran mitogenomes.Phylogenetic analyses based on the DNA sequences of the 13 protein-coding genes from the 149 species robustly support the monophyly of the subfamily Anophelinae and the tribes Aedini,Culicini,Mansonini,Sabethini,and Toxorhynchitini.To resolve ambiguous relationships between clades within the subfamily Culicinae,we performed topological tests and show that Aedini is a sister to Culicini and that Uranotaenini is a sister to(Mansonini)+(Toxorhynchitini+Sabethini).In addition,we estimated divergence times using a Bayesian relaxation clock based on the sequence data and 3 fossil calibration points.The results show mosquitoes diverged during the Early Jurassic with massive Culicinae radiations during the Cretaceous,coincident with the emergence of angiosperms and the burst of mammals and birds.Overall,this study,which uses the largest number of Culicidae mitogenomes sequenced to date,comprehensively reveals the mitogenome characteristics and mitogenome-based phylogeny and divergence times of Culicidae,providing information for further studies on the mitogenome,phylogeny,evolution,and taxonomic revision of Culicidae.

关键词： characterization Culicidae evolution mitogenomes mosquitoes phylogeny

miR-24-3p promotes proliferation and inhibits apoptosis of porcine granulosa cells by targeting P27

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Journal of Integrative Agriculture 2024年第4期23卷 1315-1328页

作者： Shengjie Shi Lutong Zhang Liguang Wang huan yuan Haowei Sun Mielie Madaniyati Chuanjiang Cai Weijun Pang Lei Gao Guiyan Chu College of Animal Science and Technology Northwest A&F UniversityYangling 712100China Key Laboratory of Animal Genetics Breeding and Reproduction of Shaanxi ProvinceYangling 712100China

Ovarian follicle development is associated with the physiological functions of granulosa cells(GCs),including proliferation and apoptosis.The level of miR-24-3p in ovarian tissue of high-yielding Yorkshire×Landrace sows was significantly higher than that of low-yielding sows.However,the functions of miR-24-3p on GCs are unclear.In this study,using flow cytometry,5-ethynyl-2′-de-oxyuridine(EdU)staining,and cell count,we showed that miR-24-3p promoted the proliferation of GCs increasing the proportion of cells in the S phase and upregulating the expression of cell cycle genes,moreover,miR-24-3p inhibited GC apoptosis.Mechanistically,on-line prediction,bioinformatics analysis,a luciferase reporter assay,RT-qPCR,and Western blot results showed that the target gene of miR-24-3p in proliferation and apoptosis is cyclin-dependent kinase inhibitor 1B(P27/CDKN1B).Furthermore,the effect of miR-24-3p on GC proliferation and apoptosis was attenuated by P27 overexpression.These findings suggest that miR-24-3p regulates the physiological functions of GCs.

关键词： miR-24-3p granulosa cells proliferation apoptosis

Creep rupture life predictions for Ni-based single crystal superalloys with automated machine learning

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Rare Metals 2024年第6期43卷 2884-2890页

作者： Chang-Lu Zhou Rui-Hao yuan Wei-Jie Liao Ting-huan yuan Jiang-Kun Fan Bin Tang Ping-Xiang Zhang Jin-Shan Li Turab Lookman State Key Laboratory of Solidification Processing Northwestern Polytechnical University Chongqing Innovation Center Northwestern Polytechnical University AiMaterials Research LLC

The state of the art for data-driven creep rupture life predictions incorporates microstructural and deformation characteristics into machine learning.However,the microstructures and deformation mechanisms for unknown alloys are inaccessible and uncertain before experiments are carried out,and therefore prevents extrapolations of the learned models.

关键词： BEHAVIOR MODEL

Detection of decomposition products of SF6/air gas mixture by electron attachment mass spectrometry

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High Voltage 2022年第3期7卷 536-544页

作者： huan yuan Xiaonan Wang Aijun Yang Dingxin Liu Xiaohua Wang Mingzhe Rong State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong UniversityXi'anChina

Sulphur hexafluoride(SF_(6))is widely used in gas insulation,and its decomposition products can be used to diagnose potential insulation failures.Quick and accurate detection of decomposition products can help to understand equipment-operating conditions in time.In this study,the decomposition products of SF_(6)/air gas mixtures under different pulsed discharge voltages were studied.It was found that the main products were SOF_(2),SO_(2)F_(2),SO_(2),CF_(4)and SOF_(4),and the yields of SOF_(2),SO_(2)F_(2),SO_(2)and SOF_(4)increased with the number of discharge pulse.The productive rate of SOF_(2),SO_(2)and SOF_(4)were positively correlated with the discharge voltage,and when the discharge voltage increased from 5 to 15 kV,their yields after 50,000 discharges increased by 49%,120%and 1100%,respectively.The productive rate of SOF_(2)and SO_(2)were positively correlated with the proportion of air in the gas mixtures while that of SOF_(4)was opposite.When the proportion of air increases from 0%to 90%,their yields after 50,000 discharges became 270%,3169%and 10%of the originals,respectively.In addition,the productive rate of SO_(2)F_(2)was not affected by discharge voltage and the proportion of air in the gas mixtures.SO_(2)F_(2),SOF_(2),SOF_(4)and SO_(2)can be used as the basis for judging the discharge failures and the discharge degree of power equipment.

关键词： insulation decomposition SF6

CLOCK inhibits the proliferation of porcine ovarian granulosa cells by targeting ASB9

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畜牧与生物技术杂志:英文版 2023年第5期14卷 1969-1985页

作者： Liang huang huan yuan Shengjie Shi Xiangrong Song Lutong Zhang Xiaoge Zhou Lei Gao Weijun Pang Gongshe Yang Guiyan Chu Key Laboratory of Animal Genetics Breeding and Reproduction of Shaanxi ProvinceCollege of Animal Science and TechnologyNorthwest A&F UniversityYangling 712100China Laboratory of Animal Fat Deposition&Muscle Development College of Animal Science and TechnologyNorthwest A&F UniversityYangling 712100China

Background Clock circadian regulator(CLOCK)is a core factor of the mammalian biological clock system in regulat-ing female fertility and ovarian physiology.However,CLOCK’s specific function and molecular mechanism in porcine granulosa cells(GCs)remain unclear.In this study,we focused on CLOCK’s effects on GC proliferation.Results CLOCK significantly inhibited cell proliferation in porcine GCs.CLOCK decreased the expression of cell cycle-related genes,including CCNB1,CCNE1,and CDK4 at the mRNA and protein levels.CDKN1A levels were upregulated by CLOCK.ASB9 is a newly-identified target of CLOCK that inhibits GC proliferation;CLOCK binds to the E-box element in the ASB9 promoter.Conclusions These findings suggest that CLOCK inhibits the proliferation of porcine ovarian GCs by increasing ASB9 level.

关键词： ASB9 CLOCK Granulosa cells Pig Proliferation

生态社会主义与中国特色社会主义生态文明的比较研究

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新东方 2024年第1期 83-88页

作者：袁欢华中师范大学马克思主义学院

生态社会主义与中国特色社会主义生态文明均在生态与社会主义的有机结合上作出了一定探索,推动着世界社会主义运动与绿色运动的发展。通过将二者进行比较不难发现,虽然二者均以建立人与自然和谐发展的社会主义社会为目标,但在指导思想... 详细信息

生态社会主义与中国特色社会主义生态文明均在生态与社会主义的有机结合上作出了一定探索,推动着世界社会主义运动与绿色运动的发展。通过将二者进行比较不难发现,虽然二者均以建立人与自然和谐发展的社会主义社会为目标,但在指导思想、致力于解决的矛盾问题以及实现生态目标的方式途径等方面存在显著差异。生态社会主义以“生态的马克思主义”为指导,深入阐释了“资本主义两重矛盾”,并在具体实践中走上了改良折中的“第三条道路”。中国特色社会主义生态文明在马克思主义的生态观的指引下,为解决社会主义社会主要矛盾做出生态贡献,形成了符合我国国情的特色路径。历史与现实证明,只有彻底推翻资本主义制度,建立人与自然生命共同体,才能彻底解决生态危机。

关键词：生态社会主义中国特色社会主义生态文明人与自然生命共同体

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商业贸易集团企业投资战略研究

全国流通经济 2024年第1期 125-128页

作者：袁焕中国平煤神马集团国际贸易有限公司河南平顶山467099

随着我国经济体制改革的深入,商业贸易集团企业的数量越来越多。商业贸易集团企业作为我国国民经济发展的重要组成部分,在经济发展中发挥着越来越重要的作用。但是,由于商业贸易集团企业自身能力不足,对市场经济运行规律认识不足,商业... 详细信息

随着我国经济体制改革的深入,商业贸易集团企业的数量越来越多。商业贸易集团企业作为我国国民经济发展的重要组成部分,在经济发展中发挥着越来越重要的作用。但是,由于商业贸易集团企业自身能力不足,对市场经济运行规律认识不足,商业贸易集团企业的经济发展还存在很多问题。本文以商贸商业贸易集团企业为研究对象,探讨商贸商业贸易集团企业的投资策略。在市场经济条件下,随着市场竞争的日益激烈和市场秩序的不断规范,我国商业贸易集团企业面临的经营环境发生了很大变化。为了使商业贸易集团企业适应外部环境的变化,实现可持续发展,有必要对其投资战略进行调整。

关键词：商业贸易企业集团投资战略