检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

基于改进切尾均值的矿井图像去噪算法

工矿自动化 2024年第4期50卷 63-68页

作者：熊增举姚成贵张德华江西信息应用职业技术学院电子工程系江西南昌330043 嘉兴大学数据科学学院浙江嘉兴314000 浙江大学电气工程学院浙江杭州310027

现有矿井图像去噪算法对于复杂噪声的去除效果有限,且处理速度不能满足实时监控需求。针对该问题,提出一种基于改进切尾均值的矿井图像去噪算法。首先,采用切尾均值滤波器对图像噪声进行初步滤除,同时引入二次检验机制处理残留的噪声点... 详细信息

现有矿井图像去噪算法对于复杂噪声的去除效果有限,且处理速度不能满足实时监控需求。针对该问题,提出一种基于改进切尾均值的矿井图像去噪算法。首先,采用切尾均值滤波器对图像噪声进行初步滤除,同时引入二次检验机制处理残留的噪声点,通过引入离散系数提升算法对不同像素的区分能力,增强去噪性能;其次,采用基于极值数量的分类处理及再次检验机制,有效减少残留噪声问题;然后,在小波函数中引入新的控制变量优化软阈值函数和硬阈值函数,构建双阈值函数,结合Radon变换增强对线性特征的处理,增强对矿井图像的检测能力;最后,采用均方误差(MSE)与峰值信噪比(PSNR)进行图像质量评价。实验结果表明:相较于切尾均值算法、硬阈值算法、软阈值算法,基于改进切尾均值的矿井图像去噪算法处理的图像的MSE增长相对缓慢,MSE最小,图像去噪效果最好;引入离散系数后,去噪图像的MSE相较于引入前低300 dB左右,PSNR相较于引入前高20 dB左右,引入离散系数能有效减少噪声点对算法的影响;相较于卡尔曼遗传优化算法、变换域图像去噪算法、交叉分支卷积去噪网络,基于改进切尾均值的矿井图像去噪算法处理的图像MSE分别降低了27,21,13 dB,PSNR分别提升了8,6,3 dB,去噪耗时分别缩短了0.20,0.16,0.14 s。

关键词：矿井图像去噪切尾均值二次检验机制小波变换离散系数双阈值函数 Radon变换

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

基于机器学习由暂态数据预测系统的演化

河南师范大学学报（自然科学版） 2024年第6期52卷 113-118,I0005页

作者：王江峰陈银霞祁月盈姚成贵浙江师范大学数学学院浙江金华312000 嘉兴大学教务处浙江嘉兴314000 嘉兴大学数据科学学院浙江嘉兴314000

如何通过少量的暂态数据去预测系统的长时间的动力学行为,是一个重要问题.对Sturat-Landau系统、布鲁塞尔振子以及Belousov-Zhabotinsky系统的稳态数据进行采集,并输入到储备池神经网络里进行训练;然后基于3个系统采集的少量的暂态数据... 详细信息

如何通过少量的暂态数据去预测系统的长时间的动力学行为,是一个重要问题.对Sturat-Landau系统、布鲁塞尔振子以及Belousov-Zhabotinsky系统的稳态数据进行采集,并输入到储备池神经网络里进行训练;然后基于3个系统采集的少量的暂态数据,利用已经训练好的神经网络模型,能够对其在不同参数下长时间的动力学行为精准地预测.研究结果有利于加深对复杂系统如何对外来的变化或扰动做出反应的理解.

关键词：储备池神经网络动力学行为 Stuart-Landau系统布鲁塞尔振子 BZ反应系统

Constructing backbone network by using tinker algorithm

在线全文

学校读者我要写书评

暂无评论

Frontiers of physics 2017年第6期12卷 63-77页

作者： Zhiwei He Meng Zhan Jianxiong Wang chenggui yao Department of Mathematics Shaoxing University Shaoxing 312000 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 China College of Science Hubei University of Technology Wuhan 430068 China

Revealing how a biological network is organized to realize its function is one of the main topics in systems biology. Tile functional backbone network, defined as the primary structure of the biological network, is of great importance in maintaining the main function of the biological network. We propose a new algorithm, the tinker algorithm, to determine this core structure and apply it in the cell-cycle system. With this algorithm, the backbone network of the cell-cycle network can be determined accurately and efficiently in various models such as the Boolean model, stochastic model, and ordinary differential equation model. Results show that our algorithm is more efficient than that used in the previous research. We hope this method can be put into practical use in relevant future studies.

关键词： biological network backbone network tinker algorithm mathematical model

Enhanced vibrational resonance in a single neuron with chemical autapse for signal detection

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第12期29卷 556-563页

作者： Zhiwei He chenggui yao Jianwei Shuai Tadashi Nakano Department of Mathematics Shaoxing UniversityShaoxing 312000China College of Mathematics Physics and Information EngineeringJiaxing UniversityJiaxing 314000China Department of Physics State Key Laboratory of Cellular Stress BiologyInnovation Center for Cell Signaling NetworkXiamen UniversityXiamen 361102China Graduate School of Frontier Biosciences Osaka University5408570Japan

Many animals can detect the multi-frequency signals from their external *** understanding for underlying mechanism of signal detection can apply the theory of vibrational resonance,in which the moderate high frequency driving can maximize the nonlinear system's response to the low frequency subthreshold *** this work,we study the roles of chemical autapse on the vibrational resonance in a single neuron for signal *** reveal that the vibrational resonance is strengthened significantly by the inhibitory autapse in the neuron,while it is weakened typically by the excitatory *** is generally believed that the inhibitory synapse has a suppressive effect in neuronal ***,we find that the detection of the neuron to the low frequency subthreshold signal can be improved greatly by the inhibitory *** finding indicates that the inhibitory synapse may act constructively on the detection of weak signal in the brain and neuronal system.

关键词： neuronal dynamics autapse vibrational resonance synchronization time delay

Synchronization performance in time-delayed random networks induced by diversity in system parameter

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2018年第10期27卷 652-659页

作者： Yu Qian Hongyan Gao chenggui yao Xiaohua Cui Jun Ma Nonlinear Research Institute Baoji University of Arts and Sciences Baoji 721007 China Department of Mathematics Shaoxing University Shaoxing 312000 China School of Systems Science Beijing Normal University Beijing 100875 China Department of Physics Lanzhou University of Technology Lanzhou 730050 China King Abdulaziz University Faculty of Science Department of Mathematics NAAM Research Group Jeddah 21589 Saudi Arabia

Synchronization rhythm and oscillating in biological systems can give clues to understanding the cooperation and competition between cells under appropriate biological and physical conditions. As a result, the network setting is appreciated to detect the stability and transition of collective behaviors in a network with different connection types. In this paper, the synchronization performance in time-delayed excitable homogeneous random networks（EHRNs） induced by diversity in system parameters is investigated by calculating the synchronization parameter and plotting the spatiotemporal evolution pattern, and distinct impacts induced by parameter-diversity are detected by setting different time delays. It is found that diversity has no distinct effect on the synchronization performance in EHRNs with small time delay being considered. When time delay is increased greatly, the synchronization performance of EHRN degenerates remarkably as diversity is increased. Surprisingly, by setting a moderate time delay, appropriate parameter-diversity can promote the synchronization performance in EHRNs, and can induce the synchronization transition from the asynchronous state to the weak synchronization. Moreover, the bistability phenomenon, which contains the states of asynchronous state and weak synchronization,is observed. Particularly, it is confirmed that the parameter-diversity promoted synchronization performance in time-delayed EHRN is manifested in the enhancement of the synchronization performance of individual oscillation and the increase of the number of synchronization transitions from the asynchronous state to the weak synchronization. Finally, we have revealed that this kind of parameter-diversity promoted synchronization performance is a robust phenomenon.

关键词： synchronization time delay excitable homogeneous random network diversity

Caspase-1 and Gasdermin D Afford the Optimal Targets with Distinct Switching Strategies in NLRP1b Inflammasome-Induced Cell Death

在线全文

学校读者我要写书评

暂无评论

Research 2022年第4期2022卷 463-479页

作者： Xiang Li Peipei Zhang Zhiyong Yin Fei Xu Zhang-Hua Yang Jun Jin Jing Qu Zhilong Liu Hong Qi chenggui yao Jianwei Shuai Department of Physics and Fujian Provincial Key Laboratory for Soft Functional Materials Research Xiamen UniversityXiamen 361005China National Institute for Data Science in Health and Medicine and State Key Laboratory of Cellular Stress Biology Innovation Center for Cell Signaling NetworkSchool of Life SciencesXiamen UniversityXiamen 361102China Complex Systems Research Center Shanxi UniversityShanxiTaiyuan 030006China College of Data Science Jiaxing UniversityJiaxing 314000China Oujiang Laboratory(Zhejiang Lab for Regenerative Medicine Vision and Brain Health)and Wenzhou InstituteUniversity of ChineseAcademyof SciencesWenzhouZhejiang325001China

Inflammasomes are essential complexes of innate immune system, which form the first line of host defense against pathogens. Mounting evidence accumulates that inflammasome signaling is highly correlated with coronavirus disease 2019 (COVID-19). However, there remains a significant gap in our understanding of the regulatory mechanism of inflammasome signaling. Combining mathematical modeling with experimental analysis of NLRP1b inflammasome signaling, we found that only the expression levels of caspase-1 and GSDMD have the potential to individually switch cell death modes. Reduction of caspase-1 or GSDMD switches cell death from pyroptosis to apoptosis. Caspase-1 and GSDMD present different thresholds and exert distinct pathway choices in switching death modes. Pyroptosis switches to apoptosis with an extremely low threshold level of caspase-1, but with a high threshold of GSDMD. Caspase-1-impaired cells employ ASC-caspase-8-dependent pathway for apoptosis, while GSDMD-impaired cells primarily utilize caspase-1-dependent pathway. Additionally, caspase-1 and GSDMD can severally ignite the cooccurrence of pyroptosis and apoptosis. Landscape topography unravels that the cooccurrence is dramatically different in caspase-1- and GSDMD-impaired cells. Besides pyroptosis state and apoptosis state, a potential new “coexisting” state in single cells is proposed when GSDMD acts as the driving force of the landscape. The “seesaw model” is therefore proposed, which can well describe the death states that are controlled by caspase-1 or GSDMD in single cells. Our study sheds new light on NLRP1b inflammasome signaling and uncovers the switching mechanisms among various death modes, providing potential clues to guide the development of more rational control strategies for diseases.

关键词： impaired utilize rational

Magnet Blocks Measurement for the Undulator ofNSRL Phase II Project

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Magnet Blocks Measurement for the Undulator ofNSRL Phase II ...

Source of Ore-Forming Fluid and Material in the Baiyun Gold Deposit, Liaoning Province, NE China: Constraints from H-O-S-Pb Isotopes and in-situ Analyses of Au-Bearing Pyrites

The Second Asian Particle Accelerator Conference

作者： Jia Qika yao chenggui Zhang shancai Diao Caozheng Xu Hongliang Lu MianlingNational Synchrotron Radiation Laboratory USTC

＜正＞ The magnetization strength of the permanent magnet blocks for the new undulator in NSRLPhase II Project is *** points measurement method using a Hall probe system is

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Earth Science 2023年第1期34卷 1-19页

作者： chenggui Lin Xiaofeng yao Jingwen Mao Tingjie Yan Zhizhong Cheng Kuifeng Mi Hongxiang Jia Lujun Lin MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing100037China School of Earth Sciences and Resources China University of GeosciencesBeijing100083China Development and Research Center China Geological SurveyBeijing100037China

The Baiyun deposit is a large gold deposit at the western end of the Liaoji rift zone in Liaoning Province, which has produced both auriferous quartz-vein type and altered-rock type mineralization. The ore bodies are mainly hosted in schist from the Gaixian Formation of the Liaohe Group. A detailed field geological survey showed that the quartz-vein type gold ore bodies are distributed in the near EW-trending and occur in the extensional tectonic space of schist in the Gaixian Formation, and the altered-rock type gold ore bodies are distributed in the near EW-trending structural belt and occur near in the Gaixian Formation of biotite schist, biotite granulite, marble and the upper footwall of dike. To further elucidate the source of ore-forming fluid and material in the Baiyun gold deposit, the H-O isotopes for quartz, S and Pb isotopes, in-situ trace elements for sulfides from quartz-vein and altered-rock type mineralization were studied. The H-O isotopic δD_(V-SMOW) and δ^(18)O_(H2O) values of the auriferous quartz range were from-88.8‰ to-82.2‰ and-1.95‰ to 4.85‰, respectively, suggests that the ore-forming fluids were mainly magmatic water with minor meteoric water. The distribution ranges of in-situ S isotopic compositions of Au-bearing pyrite in the quartz-vein type and altered-rock type ores were-8.38‰–-10.47‰(with average values of-7.89‰) and 11.38‰– 17.52‰(with average values of 11.55‰), respectively, indicating that the S isotopic compositions of the two ore types were clearly different. The in-situ Pb isotopic ratios changed almost uniformly, which showed that they had the same lead isotopic source. Based on the analysis of S and Pb isotopic compositions, the metallogenic materials in the Baiyun gold deposit were primarily from deep magma, and some wall rock materials may have been mixed in the metallogenic process. Co/Ni diagram shows that most Au-bearing pyrites have magmatic-hydrothermal or sedimentary alteration properties, and Au/As ratios were betwe

关键词： in-situ trace elements isotopes in-situ sulfur and lead isotopes hydrogen and oxygen isotopes ore genesis Baiyun gold deposit

Ore-forming age and tectonic setting of the Linjiasandaogou gold deposit in the Liaodong Peninsula,northeast China:constraints from geochronology and geochemistry

在线全文

学校读者我要写书评

暂无评论

Acta Geochimica 2022年第2期41卷 244-266页

作者： Xiaofeng yao Tingjie Yan Zhicheng Lü chenggui Lin Kuifeng Mi Shenghui Li Yang Li Wange Du Development and Research Centre China Geological SurveyBeijing 100037China 103 Brigade of Non-Ferrous Geological Bureau of Liaoning Province Liaoning 118008China China University of Geoscience Beijing 100083China Chengdu University of Technology Chengdu 610059China

The Linjiasandaogou gold deposit is located in the Qingchengzi Orefield,North China Craton,China,and has not attracted many *** present geochronological,whole-rock geochemical,and Sr–Nd–Hf isotopic data to constrain the age and tectonic setting of the mineralization.U–Pb dating of zircon from pre-and post-ore dikes indicates the Linjiasandaogou Au deposit formed at ca.227–226 *** granite porphyry(ca.227 Ma)and quartz diorite porphyry(ca.228 Ma),which are slightly older than the mineralization,have(;Sr/;Sr)i-=0.7127–0.7162,εNd(t)=–13.7 to–17.0,andεHf(t)=–14.6 to–16.9,and display enrichment in light rare earth elements and large ion lithophile elements and depletion in high field strength *** lamprophyres(226 and225 Ma),which are slightly younger than the mineralization,have higher(;Sr/;Sr)i(0.7165–0.7216),negativeεNd(t)(–11.2 to–14.3)andεHf(t)(–15.6 to–18.6)values,and are enriched in light rare earth elements but depleted in high field strength elements(Nb and Ta).The geochemical characteristics of the granitoid and lamprophyres indicate a lower crustal and enriched mantle source,*** infer that the Linjiasandaogou Au deposit formed in a postcollisional tectonic setting,following the collision between the North China,Yangtze craton,and Central Asian Orogeny in Triassic.

关键词： North China craton Qingchengzi Linjiasandaogou Triassic mineralization Post-collisional setting