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基于改进Otsu算法的轴承图像阈值分割方法
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作者 赵宇航 吴超华 +2 位作者 王鑫 张晟琦 史晓亮 《机电工程》 北大核心 2026年第1期34-44,共11页
针对轴承装配后质检时,工业相机采集到的图像存在混合噪声和背光源过曝,导致图像分割精度不高、影响后续处理的问题,提出了一种基于多特征感知与贝叶斯优化的改进大津算法(Otsu)的轴承图像阈值分割方法。首先,在图像感知层面,读取、计... 针对轴承装配后质检时,工业相机采集到的图像存在混合噪声和背光源过曝,导致图像分割精度不高、影响后续处理的问题,提出了一种基于多特征感知与贝叶斯优化的改进大津算法(Otsu)的轴承图像阈值分割方法。首先,在图像感知层面,读取、计算了图像的灰度值、梯度幅值、局部二值模型并完成了储存,对三特征数据分别进行了归一化处理,加权融合了三特征数据,得到了轴承图像的加权融合图;然后,在计算效率层面,引入了贝叶斯优化与分块动态规划方法,替代了Otsu的穷举法;最后,结合感知方法与加速方法,得到了一种基于多特征感知与贝叶斯优化的改进Otsu算法(MFB-Otsu),并与其他阈值分割算法进行了性能对比实验。研究结果表明:与Otsu算法、自适应分割算法对比,MFB-Otsu算法在保留了轴承图像全局亮度分布的基础上,强化了外轮廓边缘,抑制了边缘噪声,输出图像边缘平滑,背景与前景彻底分离;在实测边缘提取中,边缘信息保留完整,噪点干扰率相较于Otsu降低了55%;在客观图像评价指标方面,该算法的分割准确率、交并比、F1值分别达到0.997、0.989、0.994,优于Otsu算法和自适应分割算法;在计算效率层面,相较于Otsu提高了12.9%。改进Otsu算法在轴承尺寸检测中表现出良好的通用性与稳定性,具有一定的工程应用价值。 展开更多
关键词 轴承装配 图像处理 图像分割 大津算法 多特征感知和贝叶斯优化 Otsu加速方法 三维度特征加权 分块动态优化
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Galectin 3:A new player in the pathogenesis of Parkinson’s disease
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作者 Juan García-Revilla Jose Luis Venero JoséA.Rodríguez-Gómez 《Neural Regeneration Research》 2026年第3期1132-1133,共2页
Different forms of programmed cell death have been described to participate in the degeneration of dopaminergic neurons in Parkinson’s disease(PD).Given the critical role that disturbance of mitochondrial homeostasis... Different forms of programmed cell death have been described to participate in the degeneration of dopaminergic neurons in Parkinson’s disease(PD).Given the critical role that disturbance of mitochondrial homeostasis plays in the pathogenesis of PD,apoptosis can be reasonably considered as one of the cell death pathways involved in neuronal loss(Schon and Przedborski,2011).Multiple lines of evidence support that proposal such as the observations in postmortem human brain samples of PD patients including mitochondrial complex I deficiency,reactive oxygen species generation,and oxidative damage to lipids,proteins,and DNA,among others. 展开更多
关键词 disturbance mitochondrial homeostasis Mitochondrial homeostasis parkinson s disease pd given Apoptosis GALECTIN Parkinsons disease programmed cell death cell death pathways
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Davos:When Actions Speak Louder Than Words
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作者 Augusto Soto 《China Report ASEAN》 2026年第3期63-64,共2页
China’s role as a key player in shaping global development and trends stood out at the recently concluded World Economic Forum (WEF) annual meeting in Davos, Switzerland.In contrast to the incomprehensible threats is... China’s role as a key player in shaping global development and trends stood out at the recently concluded World Economic Forum (WEF) annual meeting in Davos, Switzerland.In contrast to the incomprehensible threats issued by U.S. President Donald Trump before,during, and after the Forum, China’s Vice Premier He Lifeng addressed the assembly of 65 heads of state and over 1,000 CEOs with a sober,substantive presentation. 展开更多
关键词 Davos world economic forum u s President Donald Trump Global Development Vice Premier He Lifeng China substantive Presentation
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U-S视域下中小学教师科研绩效评价指标体系研究
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作者 陈志新 齐萌 刘旭艳 《教育教学研究前沿》 2026年第1期143-145,共3页
研究围绕中小学科研研究特殊样态,聚焦“U-S”合作模式下中小学教育科研活动研究,旨在建立契合合作模式下学校教育科研特点,体现中小学科研活动科研价值的指标评价体系。首先深入分析合作模式下中小学科研评价维度,接着确定评价指标,最... 研究围绕中小学科研研究特殊样态,聚焦“U-S”合作模式下中小学教育科研活动研究,旨在建立契合合作模式下学校教育科研特点,体现中小学科研活动科研价值的指标评价体系。首先深入分析合作模式下中小学科研评价维度,接着确定评价指标,最后根据层次分析法,研究构建合作模式下的中小学教师教育科研活动评价指标体系。本研究成果能为提高中小学教师科研能力提供参考最终提升中小学合作模式的成效。 展开更多
关键词 u-s”合作 中小学教师教育科研 指标评价体系
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The nexus between the financial development and CO_(2) emissions:fresh evidence through time–frequency analyses
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作者 Faik Bilgili Erhan Muğaloğlu +3 位作者 Sevda Kuşkaya Javier Cifuentes‑Faura Kamran Khan Mohammed Alnour 《Financial Innovation》 2025年第1期1442-1463,共22页
Climate change and environmental degradation threaten the world and global economic conditions.As one of countries’most important economic components,the financial sector might be an effective tool for reducing and e... Climate change and environmental degradation threaten the world and global economic conditions.As one of countries’most important economic components,the financial sector might be an effective tool for reducing and even reversing environmental degradation.The financial sector can affect sustainability through its lending and investment practices.The sector can play a role in financing sustainable projects and businesses,helping reduce CO_(2) emissions.By aligning its financial objectives with environmental protection,the financial sector can support the transition to a more sustainable future by helping reduce environmental degradation’s negative impacts.This paper examines the domestic financial sector’s impact on CO_(2) emissions in the United States over the 1990:Q1–2022:Q3 period.In this research,the nexus between the domestic financial sector(total debt securities,loans,liabilities,and total financial assets)and Carbon dioxide emissions in the U.S.is investigated by Morlet wavelet analysis.Rest of the world:sector discrepancy transactions,rest of the world:debt securities and loans,gross domestic product,and the square of the gross domestic product,are control variables in the estimated models.Partial wavelet coherency analyses prove that the financial sector reduces CO_(2) emissions at the 5–8-year frequency band during different subsample periods.The financial sector’s instruments can be effective in struggling with climate change. 展开更多
关键词 Financial sector sustainable development Time-frequency analysis Wavelet analyses the u.s.
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Next-generation Robots Humanoid robots have become a new realm in the global race for embodied AI
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作者 Li Shimeng Wang Yan 《China Report ASEAN》 2025年第5期23-25,共3页
Since the idea of embodied artificial intelligence was born,the U.S.has been an international frontrunner in the research and development(R&D)and application of the technology,while China has been a capable chaser... Since the idea of embodied artificial intelligence was born,the U.S.has been an international frontrunner in the research and development(R&D)and application of the technology,while China has been a capable chaser in recent years,particularly in the area of humanoid robots. 展开更多
关键词 research development u s application china next generation robots embodied artificial intelligence humanoid robots
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WEAPONIZING TRADE, UNDERMINING TRUST The Trump administration’s politicization of global economics threatens international stability and damages China-U.S. relations
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作者 Hamzah Rifaat Hussain 《China Report ASEAN》 2025年第5期64-64,共1页
If there were any doubts about the Trump administration’s inherent obsession with decoupling,polarization and jolting of global trade,they can be laid to rest.A series of statements and measures have been made by the... If there were any doubts about the Trump administration’s inherent obsession with decoupling,polarization and jolting of global trade,they can be laid to rest.A series of statements and measures have been made by the U.S.government on economic relations with China including administrative decision to hit Chinese goods with additional tariffs despite China. 展开更多
关键词 global trade economic relations trade decoupling international stability tariffs polarization TRusT china u s relations
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Automatic Algorithm Programming Model Based on the Improved Morgan's Refinement Calculus 被引量:6
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作者 ZUO Zhengkang HU Ying +2 位作者 HUANG Qing WANG Yuan WANG Changjing 《Wuhan University Journal of Natural Sciences》 CAS CSCD 2022年第5期405-414,共10页
The automatic algorithm programming model can increase the dependability and efficiency of algorithm program development,including specification generation,program refinement,and formal verification.However,the existi... The automatic algorithm programming model can increase the dependability and efficiency of algorithm program development,including specification generation,program refinement,and formal verification.However,the existing model has two flaws:incompleteness of program refinement and inadequate automation of formal verification.This paper proposes an automatic algorithm programming model based on the improved Morgan’s refinement calculus.It extends the Morgan’s refinement calculus rules and designs the C++generation system for realizing the complete process of refinement.Meanwhile,the automation tools VCG(Verification Condition Generator)and Isabelle are used to improve the automation of formal verification.An example of a stock’s maximum income demonstrates the effectiveness of the proposed model.Furthermore,the proposed model has some relevance for automatic software generation. 展开更多
关键词 automatic algorithm programming model program refinement VCG IsABELLE Morgan’s refinement calculus
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The Trump 2.0 U.S.Critical Minerals Strategy and Its Implications
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作者 Wei Zongyou 《Contemporary World》 2025年第6期28-32,共5页
Rare earths and other critical minerals are widely used in clean energy,semiconductors and other advanced industries,as well as in the defense sector.They are often described as the“gold of the 21st century”and the... Rare earths and other critical minerals are widely used in clean energy,semiconductors and other advanced industries,as well as in the defense sector.They are often described as the“gold of the 21st century”and the“vitamins of industry.”As the United States steps up its containment of China,the Trump administration places great emphasis on critical minerals security. 展开更多
关键词 clean energysemiconductors Trump advanced industriesas critical minerals clean energy u s critical minerals strategy sEMICONDuCTORs rare earths
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The Logic,Features and Layout of Trump 2.0“Tariff War”
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作者 Zhao Minghao 《Contemporary World》 2025年第3期41-46,共6页
After Donald Trump returned to the White House,the U.S.government launched a host of measures of“tariff wars”.In addition to announcing tariffs on goods imported to the United States from Canada,Mexico and China,the... After Donald Trump returned to the White House,the U.S.government launched a host of measures of“tariff wars”.In addition to announcing tariffs on goods imported to the United States from Canada,Mexico and China,the government also imposed trade restrictions on specific industries including steel,aluminum and copper,as well as advanced plan for“reciprocal tariffs”.Donald Trump claimed that a“tariff war”would correct trade imbalances,boost government revenue and promote the reshoring of manufacturing to the United States.By leveraging tariffs,the U.S.also attempts to achieve goals in border security,illegal immigration and fentanyl control.Undoubtedly at a central position in Trump’s second term in office,the“tariff war”will exert impacts far beyond economic and trade policies and upon the direction of China-U.S.relations. 展开更多
关键词 trade imbalances reshoring illegal immigration border security government revenue tariff wars trade restrictions u s China relations
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Trump 2.0’s Policy Toward Africa Under the“America First”Doctrine
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作者 Wang Xuejun 《Contemporary World》 2025年第5期46-52,共7页
Since the end of the Cold War,the core goal of U.S.policy toward Africa has been to build its influence on the continent through development assistance and trade preferences attached with political conditionalities,de... Since the end of the Cold War,the core goal of U.S.policy toward Africa has been to build its influence on the continent through development assistance and trade preferences attached with political conditionalities,defined as“assistance for concessions”.After the September 11 attacks,counterterrorism became a priority in U.S.national security strategy,being one of the three pillars of U.S.policy toward Africa alongside assistance and trade. 展开更多
关键词 trump development assistance america first trade preferences attached political conditionalitiesdefined africa u s policy trade preferences build its influence continent
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Brief on Language Oriented Approach(LOA)of Teaching Programming Skills
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作者 Bauminwood 《Journal of Contemporary Educational Research》 2025年第8期78-84,共7页
The study believes teaching is a communication and exchange process between teachers and students,and the quality of teaching depends on communication qualities,especially whether theories,ideas,and methods are accura... The study believes teaching is a communication and exchange process between teachers and students,and the quality of teaching depends on communication qualities,especially whether theories,ideas,and methods are accurately transmitted from teachers to students.In programming course teaching,there are losses of the original meaning of the English textbook after being translated into Chinese.In order to avoid the loss of original meaning,the study uses original English textbook for the software programming teaching.In the language choice for specific documentation and programming descriptions,the study emphasizes the choice of the inventor’s language.Based on practice,the study summarized the principle of the Language Oriented Approach of Teaching Programming Skills,and outlined the main points and structure of this approach,concluding the prerequisites for its use.Also,the categories of Language Oriented Approach are mentioned.The study shed light on attributing the use of AI,such as the emerging ChatGPT applications,to the Language Oriented Approach. 展开更多
关键词 Language Oriented Approach of teaching Inventor’s Native Language programming professional training the nature of ChatGPT application in teaching
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Europe’s Strategic Choices and the Future of China-EU Relations
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作者 WU HUIPING 《China Today》 2025年第6期51-53,共3页
While celebrating 50 years of diplomatic ties,China and the EU are deepening their strategic partnership to counter U.S.-China tensions and Europe’s own geopolitical and economic challenges.
关键词 strategic partnership u s China tensions China Eu relations strategic choices geopolitical challenges economic challenges deepening their strategic partnership diplomatic ties
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“Chinese Chips+Mexican Manufacturing+U.S.market”The Triangular Trade Reshapes the Auto Industry
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作者 Yang Jing 《China's Foreign Trade》 2025年第5期28-31,共4页
The current global economic and trade landscape is undergoing profound changes.Since the outbreak of the China-US trade friction in 2018,the United States has systematically promoted the“de-Sinicizat ion”strategy in... The current global economic and trade landscape is undergoing profound changes.Since the outbreak of the China-US trade friction in 2018,the United States has systematically promoted the“de-Sinicizat ion”strategy in the supply chain through measures such as imposing tariffs,exercising technology blockades,and setting up industrial subsidy barriers.Chinese products,including automot ive par ts and elect ronic equipment,have been significantly impacted. 展开更多
关键词 imposing tariffsexercising technology blockadesand industrial subsidy barrierschinese supply chain Mexican manufacturing automot ive par ts u s market Chinese chips economic trade landscape
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A Brief Analysis of the Impact of China’s Monetary Policy on Natural Gas Prices
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作者 Zhang Longxing 《China Oil & Gas》 2025年第3期49-53,共5页
We often hear statements like“the market raises expectations for central bank interest rate cuts,resulting in higher commodity prices”.Given the current situation,the People’s Bank of China might adopt a more accom... We often hear statements like“the market raises expectations for central bank interest rate cuts,resulting in higher commodity prices”.Given the current situation,the People’s Bank of China might adopt a more accommodative monetary policy to mitigate the impact of the China-U.S.trade friction.Will this further easing of the monetary environment lead to an increase in natural gas prices? 展开更多
关键词 natural gas natural gas prices China u s trade friction central bank interest rate cuts central bank interest rate commodity prices given easing monetary environment monetary policy
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Prof.Ackermann,vision-based navigation and the PG master’s degree programme at HfT Stuttgart
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作者 Michael Hahn 《Geo-Spatial Information Science》 SCIE EI CSCD 2023年第2期156-159,共4页
The two topics of the article seem to have absolutely nothing to do with each other and,as can be expected in a contribution in honor and memory of Prof.Fritz Ackermann,they are linked in his person.Vision-based Navig... The two topics of the article seem to have absolutely nothing to do with each other and,as can be expected in a contribution in honor and memory of Prof.Fritz Ackermann,they are linked in his person.Vision-based Navigation was the focus of the doctoral thesis written by the author,the 29th and last PhD thesis supervised by Prof.Ackermann.The International Master’s Program Photogrammetry and Geoinformatics,which the author established with colleagues at Stuttgart University of Applied Sciences(HfT Stuttgart)in 1999,was a consequence of Prof.Ackermann’s benevolent promotion of international knowledge transfer in teaching.Both topics are reflected in this article;they provide further splashes of color in Prof.Ackermann’s oeuvre. 展开更多
关键词 Vision-based navigation visual odometry photogrammetry and geoinformatics international master’s degree program
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The DNP: Knowledge and perceptions of students in an accelerated master’s program in nursing
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作者 Young-Me Lee Karyn Holm +2 位作者 Elizabeth Florez Megan Glauser Erin Haswell 《Open Journal of Nursing》 2013年第1期138-146,共9页
While the nursing community generally agrees that the Doctorate of Nursing Practice (DNP) degree will strengthen nursing as an academic discipline, there is little known about students’ perceptions of the advanced de... While the nursing community generally agrees that the Doctorate of Nursing Practice (DNP) degree will strengthen nursing as an academic discipline, there is little known about students’ perceptions of the advanced degree. Nursing students enrolled in an accelerated master’s program in nursing (N = 45) were surveyed to assess their knowledge of the DNP degree while also identifying the perceived effect a DNP might have on their careers, on nursing as a discipline, and on public perceptions of nursing practice. In this study, 51% of participants supported the transition to the DNP as the standard degree for practice nursing while 29% were opposed. The majority of participants (71%) planned to pursue an advanced practice nursing degree/certification with 81% of this group signifying that they would do so even if a DNP is required. The majority of participants agreed that the DNP will improve public perception of advanced practice nursing, but 71% thought the title of “doctor” would confuse patients. While current nursing students are generally informed of the upcoming DNP transition, there is disagreement regarding its implications for their careers and for the extent of public understanding. 展开更多
关键词 KNOWLEDGE Perception DNP NuRsING students ACCELERATED Master’s program in NuRsING
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China's Biotechnology Development Program during the Tenth Five-Year Plan Period (2001-2005)
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《China's Foreign Trade》 2002年第6期46-46,共1页
Bioengineering TechnoIogy(Ⅰ)1. Crop molecular marker-assisted selection and pyramiding breeding technology2. Super hybrid
关键词 high China’s Biotechnology Development program during the Tenth Five-Year Plan Period
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The Impacts of Eliminating the Step 2 Program on the U.S.and World Cotton Market
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作者 Samarendu Mohanty Suwen Pan +1 位作者 Mark Welch Don Ethridge 《China Textile》 2006年第3期118-123,共6页
关键词 World the Impacts of Eliminating the step 2 program on the u.s.and World Cotton Market
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