基于Dynamo的Revit-Midas/Civil斜拉桥模型信息转换

BIM模型不支持有限元计算,且BIM模型与有限元分析模型数据交互困难,故BIM技术正向设计过程中存在建模效率低、模型修改困难等问题,无法做到BIM结构设计与有限元力学分析一体化,增加了结构模型建模与纠错成本.本文依托Revit和Midas/Civil软件平台,在Dynamo环境下采用IronPython语言设计了一套Revit-Midas/Civil的模型信息转换程序.以博士大桥主桥为对象,通过程序自动实现:1)Revit模型桥梁构件分解、截面特性计算、拉索及梁塔弹性连接处理,并转换成适用于Midas/Civil的语言格式MCT文件,实现了Revit向Midas/Civil模型信息自动转换;2)将有限元计算结果反馈到Revit模型中,对作用效应信息按数值大小赋予渐变颜色,实现了在BIM模型中显示有限元分析结果的展示功能.本文程序可实现Revit-Midas/Civil模型信息转换,有效提高了BIM正向应用效率,弥补了BIM技术在桥梁结构分析方面的不足.

基于Dynamo和Civil 3D协同应用提升桩基施工效益研究

本研究通过对Dynamo和Civil 3D协同应用研究,梳理了此两款软件快速建模要点,并基于BIM应用,实现桩基在复杂地质沟壑式岩基面入岩的快速判定,提前确定桩长。基于桩长判定结果提前预制钢筋笼,准确上报混凝土计划。同时,通过BIM可视化辅助桩基钻孔施工,有效保障了桩基成孔质量,从整体上提升了桩基施工效益。

Dialogues Among Civilizations and Cultures

Mutual learning is a cornerstone for building a global community of shared future.Cultural Envoys:Connecting Civilizations introduces the winners of the Orchid Awards,a recent laurel instituted by the China International Communications Group to recognize the work of people worldwide who have made significant contributions to cultural exchanges and mutual learning between China and the rest of the world.

Ultra-Dense LEO Satellite-Aircraft Access and Service Management in Civil Aviation

With the deployment of ultra-dense low earth orbit(LEO)satellite constellations,LEO satellite access network(LEO-SAN)is envisioned to achieve global Internet coverage.Meanwhile,the civil aviation communications have increased dramatically,especially for providing airborne Internet services.However,due to dynamic service demands and onboard LEO resources over time and space,it poses huge challenges in satellite-aircraft access and service management in ultra-dense LEO satellite networks(UDLSN).In this paper,we propose a deep reinforcement learning-based approach for ultra-dense LEO satellite-aircraft access and service management.Firstly,we develop an airborne Internet architecture based on UDLSN and design a management mechanism including medium earth orbit satellites to guarantee lightweight management.Secondly,considering latency-sensitive and latency-tolerant services,we formulate the problem of satellite-aircraft access and service management for civil aviation to ensure service continuity.Finally,we propose a proximal policy optimization-based access and service management algorithm to solve the formulated problem.Simulation results demonstrate the convergence and effectiveness of the proposed algorithm with satisfying the service continuity when applying to the UDLSN.

A Review of Infrared Thermography Applications for Civil Infrastructure

Civil infrastructure is continuously subject to aging and deterioration due to multiple factors,which lead to a decline in performance and impact structural health.Accumulated damage on structures increases operational costs and poses significant risks to public safety.Effective maintenance,repair,and rehabilitation strategies are needed to ensure civil infrastructure’s overall safety and reliability.Non-Destructive Evaluation(NDE)methods are utilized to assess latent damage and provide decision-makers with real-time information for mitigating hazards.Within the last decade,there has been a significant increase in the research and development of innovative NDE techniques to improve data processing and promote efficient and accurate infrastructure assessment.This paper aims to review one of those methods,namely,Infrared Thermography(IRT),and its applications in civil infrastructure.A comprehensive review is presented by investigating numerous journal articles,research papers,and technical reports describing numerous IRT applications for bridges,buildings,and general civil structures made from different materials.The capability of IRT to identify and pinpoint anomalies,typically in the early stages of degradation,has excellent potential to improve the safety and shore up the dependability of civil infrastructures while reducing expenses tied to maintenance and rehabilitation.Furthermore,the non-invasive nature of IRT is beneficial in mitigating disturbances and downtime that may occur during various inspection procedures.It is highlighted that IRT is a highly versatile and effective tool for infrastructure condition assessment.With further advancement and fine-tuning of the available techniques,it is likely that IRT will continue to gain significant popularity in maintaining and monitoring civil infrastructure.

文明1(civilized)、文明2(civilization)、文明3(civitas)——论“文明”一词的三种不同含义

学术界对于“什么是文明”存有争议的原因,是把文明(civilized)、文明社会(civilization)和国家(civitas)三个不同的概念混为一谈造成的。“文明1”大致相当于英语civilized(文明的)。文化是人群的生活方式,但是不仅彬彬有礼、琴棋书画、轻歌曼舞、美味佳肴是文化,愚昧粗鲁、恶俗陋习、野风蛮舞、吃糠咽菜也是生活方式,所以文明1不完全等同于文化,而只有被认可与受推崇的文化才被称为文明。无论古今中外,作为文化的文明1都是褒义的,文明1即“文明”的本义,也是对文化的价值判断。“文明2”相当于英语civilization(文明社会),摩尔根用以指称继蒙昧社会与野蛮社会之后出现的、高于蒙昧与野蛮状态的社会阶段。作为社会形态的文明2当然比蒙昧与野蛮社会要进步,但是文明社会并非一切都是文明的,其中充斥着种种不文明的蒙昧与野蛮,所以不能说文明2就是“文明的”社会。“文明3”相当于英语civitas(国家),是中国学者根据恩格斯的“国家是文明社会的概括”得出的概念,系指继部落联盟或酋邦之后出现的社会组织形态。因为不同国家的国体与政体各不相同,有了国家之后并非一切都变得比野蛮社会更文明了,所以作为国家的文明3也不都是“文明的”国家。

New dimensions of values and practical aspects research in the form of eco-civilization under the guidance of Chinese path to modernization

The Chinese path to modernization has created a new form of human civilization,and the construction of a beautiful China’s eco-civilization is an integral part of it,providing a fundamental principle for promoting the construction of an eco-civilization in the new journey of Chinese path to modernization.The introduction of eco-civilization into the new form of human civilization is an essential requirement for upholding and developing socialism with Chinese characteristics,meeting the developmental needs of the Chinese path to modernization path,and fulfilling the intrinsic demands of achieving high-quality development.eco-civilization is a form of civilization in which humans coordinate their existence with nature,society,each other,and their inner selves.It is also a form of civilization where nature,life,humans,and society coexist and mutually thrive.The pursuit of a low-carbon existence requires breaking away from the goal of material happiness and re-establishing the goal of ecological well-being.Restoring the Earth’s carrying capacity,social self-purification,promoting climate habitatization constitute the fundamental tasks in constructing a society of eco-civilization.This article aims to explore the path of habitatized ecological environment,creating a society of eco-civilization,with three macro indicators in its practice:the habitatization of the natural ecological environment,the habitatization of the social ecological environment,and the coordination of these two in climate habitatization.

Civil3d技术在河道治理中的应用分析

为了切实加强水环境保护及水资源管理与利用,近年来我国一直在加快和加大力度落实河道治理,要想保证河道治理达到预期效果,并最大程度提高河道治理工程生态效益,首先要确保河道治理设计与施工方案的科学合理性,可见借助现代化技术手段,优化和改进河道治理设计与规划是很有必要的。基于此本文首先进行Civil3d技术的梳理与说明,继而详细分析Civil3D软件在某河道治理项目的具体应用,旨在与相关工作人员相互交流、共同探讨。

The Historical Position and Value Dimensions of Human Rights Civilization

Human beings are the mainstay and the ultimate goal of civilization.The history of human civilization is a continuous struggle to realize the respect,liberation,protection,and development of humanity.Human rights are an achievement of humanity and a symbol of progress,and the human rights civilization is an important component of human civilization.Understanding and interpreting human rights from the perspective of human rights civilization means that human rights are not only a concept or an idea but also a grand historical and long-term social practice.Up to now,the development of human rights civilization has roughly experienced four awakening eras:initialization,revolution,popularization,and globalization.In terms of its value dimensions,it has the characteristics of progressiveness,diversity,commonality,inclusiveness,indivisibility,openness,and so on.The historical position of human rights civilization and the development of its value dimensions have shown to the world that human rights are the common wealth of humanity,and human rights belong to all mankind;human rights are historical,concrete,and developmental;the concept of human rights is constantly evolving,and its connotations and categories are constantly expanding;achieving the free and well-rounded development of every person is the highest value realm of human rights civilization.The Chinese modernization endows Chinese civilization with modern strength and opens up new horizons for human rights civilization.The new pattern of human rights civilization to be created by Chinese modernization not only possesses the common characteristics of human rights civilization but also enjoys Chinese characteristics based on its own national conditions,enriching and developing the diversity of human rights civilization for all mankind.

The Path,Trends,and Approaches of the Civilization Evolution of Rural Marriage Forms

Rural marriage has characteristics such as close relationship with labor production,deep integration of traditional culture,shy and introverted expression of subjective emotions,and illegal and rough marriage.The civilization evolution of rural marriage forms is moving towards a path that is conducive to the development of production and the pursuit of happiness for farmers,the construction of rural spiritual civilization,and the comprehensive development of rural society.This study analyzes the direction of the evolution of rural marriage form civilization,predicts the trend of rural marriage form civilization evolution,and proposes the future path of rural marriage form civilization evolution,including adhering to human’s most original value expectations of marriage life,drawing nourishment from excellent traditional Chinese culture,and continuously adjusting marriage and family policy tools to keep up with changes in the world of life.

基于Civil3D的渠道工程参数化设计研究

针对渠道工程设计前期勘探时间长、二维计算过程繁琐、设计变更工作量巨大、现有渠道建模未考虑与地形数据联动等问题,提出一种基于Civil3D的渠道工程参数化设计方法,即以Civil3D为核心的渠道参数化设计关键技术,采用91位图助手获取勘察后的平面坐标,使用GlobalMapper对栅格文件中高程数据进行纠偏,通过ArcGIS整合、提取地形三维空间数据,并结合WPF窗体技术,以MVVM编程框架,开发面向对象的渠道参数化设计数据管理平台,拓展Civil3D参数计算及工程数据科学管理功能,为渠道参数化模型与三维地形模型的建立奠定基础。利用Atuodesk Subassembly Composer定制渠道横断面部件,通过建立目标参数及部件元素中的逻辑关系,实现渠道模型的参数化操作和与地形模型动态链接。实例应用结果表明,该技术可使渠道工程由二维设计过渡到三维参数化设计,优化了渠道设计阶段数据采集方面时间成本,降低了Civil3D使用难度,减少了设计变更产生的工作量,提高了设计效率,为水利线状工程参数化设计提供了参考。

Anti-Spoofing:Integrated Information Authentication of BeiDou-ⅡCivil Navigation Message

The BeiDou-Ⅱcivil navigation message(BDⅡ-CNAV)is transmitted in an open environment and no information integrity protection measures are provided.Hence,the BDⅡ-CNAV faces the threat of spoofing attacks,which can lead to wrong location reports and time indication.In order to deal with this threat,we proposed a scheme of anti-spoofing for BDⅡ-CNAV based on integrated information authentication.This scheme generates two type authentication information,one is authentication code information(ACI),which is applied to confirm the authenticity and reliability of satellite time information,and the other is signature information,which is used to authenticate the integrity of satellite location information and other information.Both authentication information is designed to embed into the reserved bits in BDⅡ-CNAV without changing the frame structure.In order to avoid authentication failure caused by public key error or key error,the key or public key prompt information(KPKPI)are designed to remind the receiver to update both keys in time.Experimental results indicate that the scheme can successfully detect spoofing attacks,and the authentication delay is less than 1%of the transmission delay,which meets the requirements of BDⅡ-CNAV information authentication.

Predictive maintenance and its applications in civil engineering structures:A review

Structural health monitoring and performance prediction are crucial for smart disaster mitigation and intelligent management of structures throughout their lifespan.Recent advancements in predictive maintenance strategies within the industrial manufacturing industry have inspired similar innovations in civil engineering,aiming to improve structural performance evaluation,damage diagnosis,and capacity prediction.This review delves into the framework of predictive maintenance and examines various existing solutions,focusing on critical areas such as data acquisition,condition monitoring,damage prognosis,and maintenance planning.Results from real-world applications of predictive maintenance in civil engineering,covering high-rise structures,deep foundation pits,and other infrastructure,are presented.The challenges of implementing predictive maintenance in civil engineering structures under current technology,such as model interpretability of data-driven methods and standards for predictive maintenance,are explored.Future research prospects within this area are also discussed.

BDSec:Security Authentication Protocol for BeiDou-Ⅱ Civil Navigation Message

Due to the lack of authentication mechanism in BeiDou navigation satellite system(BDS),BD-Ⅱ civil navigation message(BDⅡ-CNAV) are vulnerable to spoofing attack and replay attack.To solve this problem,we present a security authentication protocol,called as BDSec,which is designed by using China’s cryptography Shangyong Mima(SM) series algorithms,such as SM2/4/9 and Zu Chongzhi(ZUC)algorithm.In BDSec protocol,both of BDⅡ-CNAV and signature information are encrypted using the SM4 algorithm(Symmetric encryption mechanism).The encrypted result is used as the subject authentication information.BDSec protocol applies SM9 algorithm(Identity-based cryptography mechanism) to protect the integrity of the BDⅡ-CNAV,adopts the SM2 algorithm(Public key cryptosystem) to guarantee the confidentiality of the important session information,and uses the ZUC algorithm(Encryption and integrity algorithm) to verify the integrity of the message authentication serial number and initial information and the information in authentication initialization sub-protocol respectively.The results of the SVO logic reasoning and performance analysis show that BDSec protocol meets security requirements for the dual user identity authentication in BDS and can realize the security authentication of BDⅡ-CNAV.

Exploring the Applications of Digital Twin Technology in Enhancing Sustainability in Civil Engineering:A Review

With the advent of the big data era and the rise of Industrial Revolution 4.0,digital twins(DTs)have gained sig-nificant attention in various industries.DTs offer the opportunity to combine the physical and digital worlds and aid the digital transformation of the civil engineering industry.In this paper,605 documents obtained from the search werefirst analysed using CiteSpace for literature visualisation,and an author co-occurrence network,a keyword co-occurrence network,and a keyword clustering set were obtained.Next,through a literature review of 86 papers,this paper summarises the current status of DT application in civil engineering based on a review of the origins,concepts,and implementation techniques of DTs,and it introduces the application of DTs in the full project lifecycle.This study shows that DTs have great potential to address many of the challenges faced by civil engineering.In this regard,the paper also presents some thoughts on the future directions of DT research.

Association between Mental Health Literacy and Workplace Well-Being of Chinese Grassroots Civil Servants:The Chain Mediating Effects of Regulatory Emotional Self-Efficacy and Resilience

This study aimed to investigate the relationship between mental health literacy(MHL)and workplace well-being(WWB)of Chinese grassroots civil servants,with regulatory emotional self-efficacy(RESE)and resilience as mediating variables.A questionnaire survey was conducted among Chinese grassroots civil servants,with a valid sample size of 2673 after excluding missing values and conducting relevant data processing.The PROCESS was used to examine the relationship between MHL,RESE,resilience,and WWB.The study found that MHL among grassroots civil servants was positively and significantly correlated with WWB(r=0.73,p<0.01).RESE partially mediated the relationship between MHL and WWB(β=0.25,95%CI[0.22,0.28]).Resilience partially mediated the relationship between MHL and WWB(β=0.22,95%CI[0.19,0.26]).MHL had a positive effect on WWB through the chain mediating effect of RESE and resilience(β=0.05,95%CI[0.03,0.07]).There is a close relationship between MHL and WWB,where Chinese grassroots civil servants with higher levels of MHL can develop stronger RESE and resilience,leading to higher WWB.The results of this study remind organizational institutions of Chinese grassroots civil servants that enhancing MHL,RESE,and resilience is an important pathway to promoting their WWB.

Understanding Chinese Civilisation from the Perspective of Cultural Relics

At a meeting on cultural inheritance and development on June 2,2023,President Xi Jinping summarised with penetrating insight the distinctive features of Chinese civilisation and elucidated the significance of the“two integrations”(integrating the basic tenets of Marxism with China's specific realities and the best of its traditional culture),which explain the development laws underlying Chinese civilisation.This reflects the new heights the Communist Party of China(CPC)has attained in its understanding of the path,theory,and system of socialism with Chinese characteristics,in its confidence in Chinese history and culture,and in its consciousness of promoting cultural innovation while carrying forward the traditional Chinese culture.

Speech at the Civilisation Lecture by Svetlana Sharenkova,Vice-President of Bulgaria-China Forum(Abstract)

When we try to talk about civilisation exchanges and mutual learning between China and Bulgaria,it's easy and difficult.China boasts the most ancient civilisation in the world with an ever-lasting history of over 5000 years.With a history of over 1300 years,Bulgaria is one of the oldest civilisations in Europe.There are three major civilisations emerging and thriving on this very land.

Understanding the Laws Underlying the Development of Chinese Civilisation

At a meeting on cultural inheritance and development held in Beijing,June 2,2023,President Xi Jinping put forward a holistic and systematic explanation of the distinctive features of Chinese civilisation-consistency,originality,unity,inclusiveness,and a peaceful nature.President Xi Jinping's profound exposition has granted us a deeper understanding of the laws underlying the development of Chinese civilisation by shedding light on its intrinsic characteristics.

Understanding the Historical Significance and Contemporary Value of the Distinctive Features of Chinese Civilisation

At a meeting on cultural inheritance and development held in Beijing,June 2,2023,President Xi Jinping put forward a holistic and systematic explanation of the distinctive features of Chinese civilisation-consistency,originality,unity,inclusiveness,and a peaceful nature.Underpinned by the scientific methodology of dialectical and historical materialism and an overarching strategic perspective on the great undertakings of socialism with Chinese characteristics in the new era,President Xi Jinping's profound exposition has granted us a deeper understanding of the laws underlying the development of Chinese civilisation by shedding light on its intrinsic characteristics.This understanding bears not just immense historical importance but also significant contemporary value.