Subsurface multi-physical characterization of mountain excavation and city construction in loess plateau with a fiber-optic sensing system

Mountain excavation and city construction(MECC)projects being launched in the Loess Plateau in China involve the creation of large-scale artificial land.Understanding the subsurface evolution characteristics of the artificial land is essential,yet challenging.Here,we use an improved fiber-optic monitoring system for its subsurface multi-physical characterization.The system enables us to gather spatiotemporal distribution of various parameters,including strata deformation,temperature,and moisture.Yan’an New District was selected as a case study to conduct refined in-situ monitoring through a 77 m-deep borehole and a 30 m-long trench.Findings reveal that the ground settlement involves both the deformation of the filling loess and the underlying intact loess.Notably,the filling loess exhibits a stronger creep capability compared to underlying intact loess.The deformation along the profile is unevenly distributed,with a positive correlation with soil moisture.Water accumulation has been observed at the interface between the filling loess and the underlying intact loess,leading to a significant deformation.Moreover,the temperature and moisture in the filling loess have reached a new equilibrium state,with their depths influenced by atmospheric conditions measuring at 31 m and 26 m,respectively.The refined investigation allows us to identify critical layers that matter the sustainable development of newly created urban areas,and provide improved insights into the evolution mechanisms of land creation.

Planning and construction of Xiong’an New Area(city of over 5 million people):Contributions of China’s geologists and urban geology

China established Xiong’an New Area in Hebei Province in 2017,which is planned to accommodate about 5 million people,aiming to relieve Beijing City of the functions non-essential to its role as China’s capital and to expedite the coordinated development of the Beijing-Tianjin-Hebei region.From 2017 to 2021,the China Geological Survey(CGS)took the lead in multi-factor urban geological surveys involving space,resources,environments,and disasters according to the general requirements of“global vision,international standards,distinctive Chinese features,and future-oriented goals”in Xiong’an New Area,identifying the engineering geologic conditions and geologic environmental challenges of this area.The achievements also include a 3D engineering geological structure model for the whole area,along with“one city proper and five clusters”,insights into the ecology and the background endowment of natural resources like land,geothermal resources,groundwater,and wetland of the area before engineering construction,a comprehensive monitoring network of resources and environments in the area,and the“Transparent Xiong’an”geological information platform that is open,shared,dynamically updated,and three-dimensionally visualized.China’s geologists and urban geology have played a significant role in the urban planning and construction of Xiong’an New Area,providing whole-process geological solutions for urban planning,construction,operation and management.The future urban construction of Xiong’an New Area will necessitate the theoretical and technical support of earth system science(ESS)from various aspects,and the purpose is to enhance the resilience of the new type of city and to provide support for the green,low-carbon,and sustainable development of this area.

Exploration of Smart City Construction

In recent years,all walks of life have begun to propose the construction of“smart cities”.It is hoped that the construction of“smart cities”can pro-mote the transformation and upgrading of urban development and make our cities prosperous and sustainable.In the future,urban construction is very likely to develop in the direction of intelligence and intelligence,and a scientific and effective understanding and objective evaluation of the devel-opment status of China’s smart cities will be conducive to the planning and design of China’s smart cities in the new era,formulate scientific construc-tion policies,and strengthen the supervision and guidance of construction.At present,as far as China is concerned,the urbanization process is accel-erating,the urbanization rate is increasing year by year,and the level of urbanization has increased significantly,and people are beginning to think about how to better combine technology and services to serve the people.Smart cities,as one of the concerns,may be able to better solve this kind of problem.

Smart City Rail Transit Operation and Management Information Construction Strategy

Rail transit is considered one of the safest and most efficient modes of transportation.Ticketing,vehicle dispatching,and passenger flow control during rail transit operations in China have been improving over the years.Smart city construction and intelligent management models has also been increasingly emphasized with the rapid development of information and internet technology.Therefore,it is essential to conduct relevant research and discussions to improve the overall efficiency and quality of urban rail transit operation and management.This article provides an overview of smart city rail transit operation and management informatization,the principles of construction,and the functions of smart city rail transit operation and management informatization.Additionally,it discusses the strategies for the construction of smart city rail transit operation and management information and its development prospects.

Construction land expansion and influencing factors of typical river valley cities in Northeast China: Taking Jilin City as an example

Jilin City is a typical river valley city in Northeast China.In this paper,the authors studied the spatial and temporal expansion characteristics of the built-up areas in Jilin City from 1990 to 2020 using the analysis of expansion speed and strength,fractal dimension,barycenter coordinate transfer index and sector analysis.The ultimate-goal is to analyze the driving and restrictive factors that affect the spatial expansion of river valley cities.The results indicate that(1)the expansion speed of urban land in Jilin City has been re-latively slow in the past 30 years,while only slightly faster in 2010–2020;(2)in the spatial dimension,Jilin City mainly expanded to the south,then to the west,and extensive expansion has resulted in complex mor-phology with little stability and compactness;(3)the expansion is affected by multiple factors,of which the positive factor is industrial development,while the restrictive factors include natural factors,population loss,etc.This study provides a case for the formulation of land use policies and land space planning in river valley cities.

Research on Ecological Livable Urban Construction in Small and Medium Cities of China——A Case Study of Huaihua City

The paper has analyzed the concept of ecological livable city,considered that small and medium cities as the major pattern of China's urbanization are more likely to become ecological livable cities compared with large cities.Based on the actual situation of Huaihua City,it has pointed out its advantages in transport,ecology,foundation and national characteristic,and analyzed existing problems in the construction of ecological livable city from the perspective of urban eco-environment.It considers that its urban ecological planning is to be perfect,urban environment pollution is still serious and people's consciousness for environmental protection is to be improved.On this basis,relevant suggestions have been proposed for ecological livable urban construction in Huaihua City,emphasizing it should perfect urban ecological planning,enhance environmental pollution treatment,intensify environmental protection education,and improve people's consciousness for environmental protection.

Energy-Saving Construction Technologies for Buildings

The development of the construction industry is shifting towards low-carbon construction,so it is necessary to improve and optimize related construction concepts,methods,and processes.By improving resource and energy control efficiency in building projects,minimizing construction waste,and reducing environmental impact,a foundation for the sustainable development of the industry can be established.This paper mainly analyzes the significance of low-carbon energy-saving construction technology and the control factors of construction,summarizes the status quo of the development of building energy-saving construction,and puts forward strategies for applying building energy-saving construction technology.These strategies serve to achieve low-carbon and energy-saving goals to promote the healthy development of energy-saving construction.

Application of Landscape Smart Lighting in Construction Projects

Currently,to effectively construct high-quality smart cities and achieve comprehensive governance goals,various industries must embrace the transformation and upgrading of traditional management methods through the integration of new technologies.Among these,landscape smart lighting serves as a crucial tool for advancing smart city development.By judiciously applying this technology,it is possible to enhance traditional lighting methods and offer people novel experiences in their daily lives.Recognizing this importance,this article analyzes and organizes the content of landscape smart lighting,delves into its system characteristics,and summarizes its principles and practices in the field of architectural engineering as practical references for application scenarios.

Core Competitiveness Construction of Clothing Brands in Low-Carbon Economy

The climate issue has become an environmental concern for all sectors of the world and the low-carbon economy has thus become a new economic development model to combat climate change.With the development of low-carbon economy era,the textile and clothing industry plays an important role in stabilizing the development of low-carbon economy and society,and China has put forward the development requirements of low-carbon transformation for the textile and clothing industry,and also it has an important strategic value to promote the high-quality development of low-carbon economy and society,and the construction of brands’ core competitiveness is an inevitable choice for clothing brands in the face of the new form of international competition.As a result,the evaluation indicator of clothing brands’ core competitiveness in the low-carbon economy is used to measure the core competitiveness of clothing brands.Based on the corresponding verification results obtained by analytic hierarchy process(AHP) analysis,it can guide the low-carbon development of the clothing industry,thus proposing a more reasonable way to build the core competitiveness of clothing brands.It can promote the low-carbon transformation and upgrading of the clothing industry,effectively increase the market share of clothing brands,and promote the high-quality development of clothing brands.

Discussion on the Problems and Path of Characteristic Town Construction in Underdeveloped, Resource-Based Cities: A Case Study of Ganzhou City

Characteristic towns as a characteristic industry are one of the important measures of China's new urbanization strategy. The construction of characteristic towns in different regions needs to pay attention to regional differentiation. At present, the research on characteristic towns focuses on the developed the developed central and eastern regions. There are still few studies on characteristics towns in underdeveloped areas. Starting from the analysis of the concept of the characteristic town, this paper sorted out the general situation of the construction of characteristic towns in China based on the existing research literature, selected Ganzhou City for research, pointed out there were "two restrictions and two singles" in the construction of characteristic towns in Ganzhou City, and clarified that the characteristic towns of Ganzhou City should adhere to the construction path of "two characteristics and two integrations", with a view to providing a useful reference for in Ganzhou City the construction of characteristic towns, industrial transformation and upgrading, and poverty alleviation in such underdeveloped, resource-based cities.

A review of low-carbon city construction research in China

Based on the analysis on the global warming and environmental deterioration,low-carbon concept has received more and more attention from governments,experts and scholars at home and abroad.The British government first put forward the concept of low-carbon economy,and after that the Japanese government proposed the construction of low-carbon society.In our country,experts and scholars began to research on low-carbon city from 2007.This paper looks through the practical and theoretical studies on low-carbon city construction of the domestic experts and scholars.The current background of lowcarbon city construction is first introduced.To clarify fundamental connotation,characteristics and target of China's low-carbon city is very important.Therefore,this paper summarizes the research progress of the low-carbon city construction from the necessity,the connotation and characteristics of target.Then,we should pay attention to choosing the right index,combining the region characteristics with the current development model and evaluation indexes system,to reflect and improve carbon emissions.Finally,the paper gives an overview of suggestions by experts and scholars on the construction of low carbon city.

A Tentative Study on the Combination of Site Protection and City Construction of Xi'an

The protection of relic sites helps determine the culture coordinate of a city or a region,and enhances its cultural image and status.Through analyzing the construction features and technical means of various ruins parks in Xi'an including Daming Palace National Heritage Park,Qujiangchi Ruins Park,Hanyao Ruins Park,Dacien Temple Ruins Park,Tang Dynasty City Wall Ruins Park,Emperor Qin Ⅱ Mausoleum Ruins Park and so on,a new model combining the site protection with city construction is presented.By integrating cultural relics preservation,heritage protection with innovation,a series of ruins parks processed with deep cultural connotation are constructed,which not only protects the relics and refreshes the city construction,but also well reflects the essence of traditional Chinese culture unique charm of ancient oriental civilization.The well combination of site protection and city construction improves the cultural image and status of the city,enhances the charm of public cultural space,promotes the development of heritage protection and secures more funds for urban and rural construction.

Transitional Road of Resources-exhausted Cities to Low-carbon Economy:Tourism Resources Development——A Case Study of Gejiu City

Tourism is of vital practical significance to low-carbon economic transition of resources-exhausted cities.By taking Gejiu City of Yunnan Province for example,the paper discussed that Gejiu City as the resources-exhausted city should positively develop tourism,particularly industrial heritage tourism,treating tourism development as the breakthrough and motive power of low-carbon economic transition of resources-exhausted cities,so as to walk out a unique road of tourism promoting low-carbon economic development.

Study on Construction Mode of Leisure City ——A Case Study of Langfang City in Hebei Province

Based on the analysis of development advantages of Langfang City,a construction mode of leisure Langfang City was constructed,which was "taking commercial leisure as the leading guidance,public leisure as the supplement,and brand festival as the main line".Finally,some experiences for leisure city construction were summarized,so as to provide reference for leisure construction of cities which were lack of traditional tourism resources.

Low-carbon Landscape Construction Approaches Based on Human Behavior

After the analysis of connotations of human behavior and low-carbon landscape,according to relevant theories of behavioral science and psychology,the internal relation between behavior and lowcarbon landscape has been discussed.They relate to,interact on and are the precondition of each other.Reasonable landscape environment has carried people's expectation for nature,and different landscapes give people different feelings and present to be of different behavior features.Finally,the paper has proposed constructing low-carbon landscape in the perspective of landscape design idea,design methods,construction process and later management,providing a theoretical basis for advocating energy saving and environmental protection,and creating green ecology.

The Enlightenment on Urban Ecological Construction by Research Progress of Sponge City in China Based on Literature Analysis

To quantitatively analyze main figure,field,agency and level of sponge city research in China,and clear research focus and hot spot in each year,by using the Full Text Database of Chinese Sci-tech Periodicals and other retrieval tools,the statistics and analysis of 3152 research literatures on sponge city published in domestic academic journals of 2004-2016 are conducted based on bibliometrics. It is found that since the concept of " sponge city" was firstly proposed in 2012,development research of sponge city involves 40 subject fields and is mainly published in 32 kinds of journals,which is dominated by natural science research( 1427 literatures). Researchers are mainly from each college and university,some design institutes and Chinese Academy of Sciences. The research could play certain guidance significance for further research and construction of ecological city construction in China.

Frame Construction and Task Analysis of Smart Energy in the Construction of Smart City

Smart energy is the foundation and important component of smart cities, and it is the source of energy that guarantees the efficient and reliable operation of each subsystem of the city. Based on the practical experience in the exploration of the construction of smart energy at home and abroad, and the goal of achieving “three transformations and one center”, the basic principles of the frame construction as well as display construction and physical construction of smart energy have been proposed. Four main tasks of the construction of smart energy have been discussed: infrastructure, energy supply, energy consumption, and management services.

Construction of Ecological Green Space System in Yan'an City,China

Ecosystem of Yan'an City is being faced with serious problems such as increasing pressure of protecting ecological elements,and contradictions in utilization of ecological spaces.To enhance supervision over regional ecological resources,guide the orderly expansion of urban spaces,construct a stable eco-security pattern for sustainable development of the city,and create an urban environment favorable for living and working,this study follows the principles of "ecology on the priority,landscape continuity,diversity,optimization of layout,and sustainability".By analyzing distribution features of ecological resources in Yan'an City,considering rules of its urban space expansion,and studying the "ring-wedge-network" spatial pattern of its ecological green spaces,this study is to build an ecological network with a complete spatial system,definite ecological zoning and characteristic landscapes in which ecological elements are protected comprehensively,ecological conservation,restoration and construction promoted simultaneously.

Luoyang Dual Spatial Criterion Ecological City Construction

The construction of an ecological city has two founda- tional platforms: the small platform, namely urban district or simply called as "city ecosystem"; and the big platform, namely around city district in certain region scope or also referred to as "city-region ecosystem". The construction of an ecological city must be launched in the dual spatial criteria: in city (urban district) criterion—optimizing the city ecosystem; in city-region (city territory) criterion—optimizing the city-region ecosystem. Luoy-ang has the bright characteristic and the typical image within cities of China, and even in the world. The construction of an ecological city in dual spatial criteria—the city and the city-region—has the vital significance to urbanization advancement and sustainable development in Luoyang. In city-region criterion, the primary mission of Luoyang’s ecological city construction is to create a fine ecological environment platform in its city territory. In city criterion, the basic duty of Luoyang’s ecologic city construction is to enhance the ecological capacity and benefit of the central city.

Thoughts and Strategies of Sponge City Construction Planning: A Case Study of Pingxiang, Jiangxi Province

At present and for a long time in the future, urbanization in China will maintain a rapid development speed. After the rainstorm, the phenomenon of “sea views” is common. The direct reason is that the urban drainage system and the ground drainage system cannot afford the large flow of water in a short period of time, but the most fundamental reason is that the artificial construction environment changes the water storage and drainage function of the ground under the natural state. “Sponge city construction” came into being. This paper mainly analyzes and studies the sponge city construction in Pingxiang City, Jiangxi Province, and uses the method of field investigation and literature data to clarify the ideas of the sponge city construction in Pingxiang City and summarize the successful experience, which can provide a reference for the subsequent “sponge city development” ideas.