基于Union-Find的图像聚类方法

传统的图像聚类方法存在对初始数据敏感且计算复杂度高的问题,且图像全局特征难以有效地表达图像内容。针对这些问题,提出一种基于Union-Find的图像聚类方法。首先,该方法采用视觉词袋模型Bo VWM(Bag of Visual Words Model)来描述图像内容并且利用投票方法来计算每对图像的相似度得分;然后,对于相似度得分大于给定阈值的图像对进行union和find两个操作并将相连的分量形成聚类结果。实验结果表明,该方法较之于传统方法能较好地改善图像聚类效果,且不需要初始聚类数目作为先验参数。

UNION-FIND序列的计算时间

本文讨论了UNION-FIND算法,用一种比较简单的方法证明了W-UNION与C-FIND序列的计算时间是非线性的.

New Algorithm for Binary Connected-Component Labeling Based on Run-Length Encoding and Union-Find Sets

Based on detailed analysis of advantages and disadvantages of the existing connected-component labeling （CCL） algorithm,a new algorithm for binary connected components labeling based on run-length encoding （RLE） and union-find sets has been put forward.The new algorithm uses RLE as the basic processing unit,converts the label merging of connected RLE into sets grouping in accordance with equivalence relation,and uses the union-find sets which is the realization method of sets grouping to solve the label merging of connected RLE.And the label merging procedure has been optimized：the union operation has been modified by adding the ＂weighted rule＂ to avoid getting a degenerated-tree,and the ＂path compression＂ has been adopted when implementing the find operation,then the time complexity of label merging is O（nα（n））.The experiments show that the new algorithm can label the connected components of any shapes very quickly and exactly,save more memory,and facilitate the subsequent image analysis.

UNION-FIND算法中数据结构的应用

本文以UNION-FIND算法的设计为例,分析了数据结构对算法时间复杂度的影响。在UNION-FIND 问题的算法设计中,如果选择数组结构,算法的执行将需要花费平方级的运行时间;如果选择树结构,且对算法进行优化改进,几乎可以保证算法的运行时间是线性的。因此在算法设计中应当选择有效的数据结构。

Open banking and inclusive finance in the European Union:perspectives from the Dutch stakeholder ecosystem

In the European Union(EU),the revised Payment Services Directive(PSD2)aims to provide more convenient and customized financial products through open banking(OB)platforms.However,little attention has been paid to the role of OB in improving the financial well-being of the growing number of the EU’s underserved groups,which currently constitute approximately a quarter of its population.This study examines how the PSD2 and OB impact inclusive finance in the EU based on the perspectives of the Netherlands’ecosystem,one of the leaders in the EU’s financial technology(FinTech)landscape.A fundamental distinction can be drawn between the OB users and the ecosystem’s players.Regarding the impact of financial services on the users’inclusivity,while the PSD2 strengthens the infrastructure necessary for financial inclusion,many challenges remain,mainly because it was not designed for this purpose.This study identifies several areas of improvement that include adjustments to the know your customer and anti-money laundering processes for underserved customers,innovative ways to communicate the PSD2’s potential,and the regulation of technology providers’activities to build trust.Meanwhile,from the ecosystem’s position,there is a need to strengthen and improve microfinance regulation according to the opportunities provided by the PSD2 to support microfinance institutions(MFIs)in scaling up and reaching underserved clients across borders with innovative services.OB improvements can also be achieved by organizations formed by MFIs and FinTechs in collaboration with banks.Such hybrid institutions will combine the best features of each of them:knowledge of the needs of local underserved clients from MFIs,technological innovations from FinTechs,and large and trusted customer bases,infrastructures,and access to institutional investments and governments from banks.Finally,an EU inclusive OB sector depends on the centrality of trusted regulators as coordination bodies.The PSD2 requires adjustments for underserved populations’specific needs.OB improvements can be achieved by organizations formed by MFIs and Fin-Techs in collaboration with banks.Regulated technical service providers(TSPs)are crucial to building trust and customer adoption in OB.The European Banking Authority(EBA)may function as coordination body to design inclusive rules by engaging with OB stakeholders.As inclusive finance moves into open-finance and data eras,an increasing regulatory complexity and scope will require networks of innovative and trusted regulators.

Research on the Regulatory Framework of Advanced Therapies in the European Union and the United States

Objective To study the regulatory framework of advanced therapies in the European Union and the United States,and to provide reference for the regulation of cell-and gene-based therapeutic products in China.Methods The legal and regulatory documents,annual reports,work information and related literature published on the websites of the FDA and European Medicines Agency(EMA)were reviewed to analyze the regulatory models of advanced therapies in the European Union and the United States.Results and Conclusion the United States and the European Union have carried out a lot of work in the classification standards of advanced therapies,policy formulation and accelerated listing procedures.Therefore,they have established a relatively mature regulatory system.China can learn from their experience and continuously improve the regulatory system to help the sustainable development of gene and cell therapy industry.

Research on the Interior Decoration Characteristics of Peking Union Medical College Phase I Project

Peking Union Medical College was founded in the late Qing Dynasty and the early Republic of China.Since then,society and politics have been rapidly changing,and its architectural aesthetics reflect the idea of advocating the West and inheriting tradition.Through research and actual investigation,this paper summarizes the current status of its building from two aspects,interior decoration art and interior decoration technology,analyzes the interior decoration characteristics of Peking Union Medical College Phase I Project,and records the archives of Peking Union Medical College’s decoration technology.

微机网上的分布式专家联合系统UNION(下)

本文描述微机网上的分布式专家联合系统UNION的实现方法和技术。UNION是继1985年陆汝钤提出分布或专家系统的概念及其设计思想之后于 次年夏天开始组织实现的一个实验系统。目标机型是配有UNOS操作系统、PASCAL和C语言的MC68000微机,它们用Ethernet局部网联网。UNION目前已完成支撑系统Support1和通信系统,其余部分正在实现中。UNION的工程实现由中国科学院数学研究所承担。

微机网上的分布式专家联合系统UNION(上)

本文描述微机网上的分布式专家联合系统UNION的设计思想、目标、体系结构和原理。UNION是继1985年陆汝钤提出分布式专家系统的概念及其设计思想之后于次年夏天开始组织实现的一个实验系统。目标机型是配有UNOS操作系统、PASCAL和C语言的MC68000微机,它们用Ethernet局部网联网。UNION目前已完成支撑系统Sup- port1和通信系统,其余部分正在实现中。UNION的工程实现由中国科学院数学研究所承担。

风景园林设计的社会学属性--兼论Union Point公园的设计

风景园林设计的理念随着时代的变革而不断地演化,并趋于多样化。现代主义使得园林不再是贵族们隐居消闲的场所,而是作为一种社会基础设施进入公众的生活之中。后现代主义又使精英意识逐渐被平民情结所取代,公众参与的呼声日见高涨。以美国奥克兰市UnionPoint公园的设计过程为例,探讨了在后现代语境下风景园林设计的社会学属性,特别是"公众参与"的策略在公园设计过程中的应用和体现。同时结合国情,分析这种新的设计行为对我国风景园林设计师的借鉴意义。

Age-related secretion of grancalcin by macrophages induces skeletal stem/progenitor cell senescence during fracture healing

Skeletal stem/progenitor cell(SSPC)senescence is a major cause of decreased bone regenerative potential with aging,but the causes of SSPC senescence remain unclear.In this study,we revealed that macrophages in calluses secrete prosenescent factors,including grancalcin(GCA),during aging,which triggers SSPC senescence and impairs fracture healing.Local injection of human rGCA in young mice induced SSPC senescence and delayed fracture repair.Genetic deletion of Gca in monocytes/macrophages was sufficient to rejuvenate fracture repair in aged mice and alleviate SSPC senescence.Mechanistically,GCA binds to the plexin-B2 receptor and activates Arg2-mediated mitochondrial dysfunction,resulting in cellular senescence.Depletion of Plxnb2 in SSPCs impaired fracture healing.Administration of GCA-neutralizing antibody enhanced fracture healing in aged mice.Thus,our study revealed that senescent macrophages within calluses secrete GCA to trigger SSPC secondary senescence,and GCA neutralization represents a promising therapy for nonunion or delayed union in elderly individuals.

Detection Algorithm of Laboratory Personnel Irregularities Based on Improved YOLOv7

Due to the complex environment of the university laboratory,personnel flow intensive,personnel irregular behavior is easy to cause security risks.Monitoring using mainstream detection algorithms suffers from low detection accuracy and slow speed.Therefore,the current management of personnel behavior mainly relies on institutional constraints,education and training,on-site supervision,etc.,which is time-consuming and ineffective.Given the above situation,this paper proposes an improved You Only Look Once version 7(YOLOv7)to achieve the purpose of quickly detecting irregular behaviors of laboratory personnel while ensuring high detection accuracy.First,to better capture the shape features of the target,deformable convolutional networks(DCN)is used in the backbone part of the model to replace the traditional convolution to improve the detection accuracy and speed.Second,to enhance the extraction of important features and suppress useless features,this paper proposes a new convolutional block attention module_efficient channel attention(CBAM_E)for embedding the neck network to improve the model’s ability to extract features from complex scenes.Finally,to reduce the influence of angle factor and bounding box regression accuracy,this paper proposes a newα-SCYLLA intersection over union(α-SIoU)instead of the complete intersection over union(CIoU),which improves the regression accuracy while increasing the convergence speed.Comparison experiments on public and homemade datasets show that the improved algorithm outperforms the original algorithm in all evaluation indexes,with an increase of 2.92%in the precision rate,4.14%in the recall rate,0.0356 in the weighted harmonic mean,3.60%in the mAP@0.5 value,and a reduction in the number of parameters and complexity.Compared with the mainstream algorithm,the improved algorithm has higher detection accuracy,faster convergence speed,and better actual recognition effect,indicating the effectiveness of the improved algorithm in this paper and its potential for practical application in laboratory scenarios.

A Novel Foreign Object Detection Method in Transmission Lines Based on Improved YOLOv8n

The rapid pace of urban development has resulted in the widespread presence of construction equipment andincreasingly complex conditions in transmission corridors. These conditions pose a serious threat to the safeoperation of the power grid.Machine vision technology, particularly object recognition technology, has beenwidelyemployed to identify foreign objects in transmission line images. Despite its wide application, the technique faceslimitations due to the complex environmental background and other auxiliary factors. To address these challenges,this study introduces an improved YOLOv8n. The traditional stepwise convolution and pooling layers are replacedwith a spatial-depth convolution (SPD-Conv) module, aiming to improve the algorithm’s efficacy in recognizinglow-resolution and small-size objects. The algorithm’s feature extraction network is improved by using a LargeSelective Kernel (LSK) attention mechanism, which enhances the ability to extract relevant features. Additionally,the SIoU Loss function is used instead of the Complete Intersection over Union (CIoU) Loss to facilitate fasterconvergence of the algorithm. Through experimental verification, the improved YOLOv8n model achieves adetection accuracy of 88.8% on the test set. The recognition accuracy of cranes is improved by 2.9%, which isa significant enhancement compared to the unimproved algorithm. This improvement effectively enhances theaccuracy of recognizing foreign objects on transmission lines and proves the effectiveness of the new algorithm.

TH—union教学机微程序控制器部件实验的实现

本文介绍了TH—union教学机微程序控制器部件实验的原理及实现方法.

SPRING FESTIVAL CELEBRATIONS BUILD A GLOBAL CULTURAL COMMUNITY

As the Year of the Dragon draws close,the Chinese worldwide,as well as the countries and groups sharing the festival,are gearing up to celebrate the most important social event in the Chinese lunar calendar.For the Chinese,the Spring Festival,or the Chinese New Year,is far more than an occasion for merrymaking.It’s a time for family reunion and the beginning of a new start filled with hope.So the celebrations are also a prayer for peace,prosperity,health,longevity,good luck,and even a bumper harvest.

Chinese New Year Folk Activities in Gansu Promoting Tourism Economy to Heat Up Again

The Chinese New Year is the most solemn traditional festival of the Chinese nation,which is a folk festival integrating the old and the new,praying for auspiciousness,family reunion,celebration and entertainment,and carrying rich historical and cultural heritage.

The Volga River Is Russia’s Lifeline and in Need of Maintenance, Mitigation and Restoration

The Volga River flows entirely through Russia and the watershed includes three of the country’s ten largest cities. The river is the longest in Europe and western Russia’s principal waterway. The Volga River basin is home to approximately half of Russia’s population and occupies almost two-fifth of European Russia. It covers much of the Volga region and stretches 3530 kilometers from its source in the Valdai Hills to the Caspian Sea, the world’s largest inland water body. Its economic, cultural, and historic importance makes it one of the world’s greatest rivers. The Volga basin makes up 8 percent of the Russian territory. Stalingrad, located on the banks of the Volga River, has been described as the site of the greatest de-feat in the history of the German Army. It is often identified as the turning point on the Eastern Front of WWII, in the war against Germany, and in the entire WWII. The meeting point of the Eurasian Civilization was historically the Volga River. The river has some of the world’s largest reservoirs and is a major source of livelihood for millions of people. Many factories and cities empty their waste including sewage, industrial waste, fertilizers, and pesticides into the Volga River. Pollutants tend to settle in the reservoirs and contain several meters of heavily contaminated muck. The primary objectives are to assess lessons learned, manage, and restore the Volga River system lifeline in Russia.

教室里的团聚

A classroom of high school students helped their teacher welcome her overseas soldier son back after being apart for over five years,and it had us in tears.A video of the reunion has caught the attention of more than 40 million people.It shows the son wearing his military uniform and carrying flowers and a sign that reads,“Im home.”When his mother walks into the class,he hides behind the door and then sneaks behind a whiteboard so the students can prime her for the big secret.

面向海量数据的并行UNION查询技术研究与实现

分析了目前海量并行数据库中的UNION查询时所面临的问题,设计并实现了一种面向海量数据的并行UNION查询系统UQS(UnionQuerySystem)。从UQS的体系结构出发,提出了一组新的并行UNION查询算法。新的算法采用增量多路连接、双缓冲并行处理和多路并行归并的策略和算法,在中间件层上支持并行海量数据库U-NION查询,并在Oracle10g集群上基于CORBA技术实现新的算法。理论分析和实验结果表明,基于新算法的UQS的性能显著优于传统查询方法。

SQL语句中UNION子句的使用

本文通过两个常见查询的产生来介绍如何利用VisualFoxPRO的SQL语句中UNION子句产生复杂查询．