Taking major science and technology project organization mode as the main line, comprehensive summary on the situation of major science and technology projects in Dongguan was conducted to analyze the problems and the insufficiency.In order to promote the development of science and technology innovation can assign high quality, learning from advanced city experience, some suggestions are put forward, including focusing on the municipal special scheduling mechanism, strengthening key areas of research and development projects for the basic point, the foothold, innovation organization and management mode for the breakthrough point, optimizing the service guarantee system for support dimension, gradually exploring to establish the characteristic of Dongguan science and technology project organization mode.

Selecting the relevant data from 2012 to 2021, the economic collaborative development level of each subsystem of Shenyang Modern Metropolitan Area, Liaoning Coastal Economic Belt, and the composite system of “One Area and One Belt” of Shenyang and Dalian was analyzed by measuring the economic correlation degree, order degree and synergy degree of cities. The results show that the economic connection intensity between Shenyang and its peripheral cities is relatively strong, while that of Dalian and its peripheral cities is relatively weak. The order degrees of each subsystem of Shenyang Modern Metropolitan Area and Liaoning Coastal Economic Belt both show a decreasing and increasing process, and the orderliness is developing continuously for the better. The synergy degree of the composite system of “One Area and One Belt” of Shenyang and Dalian is in a good synergy state, but there is still room for improvement. In the future, it is necessary to start from strengthening the radiation and driving effect of core cities, improving the orderliness of the development of each subsystem, promoting the linkage development of “One Area and One Belt” of Shenyang and Dalian, and optimizing the overall design, to improve the regional economic collaborative development level of Liaoning Province.

In order to objectively evaluate the county geological disaster risk information and provide an effective research basis for disaster prevention and reduction, the risk assessment was mainly carried out in the key research area of Kuancheng Manchu Autonomous County. Based on the data of field investigation, previous research and ArcGIS spatial software analysis results, AHP(analytic hierarchy process)-information method was adopted to select 11 evaluation factors for classified evaluation of key research areas, so as to ensure the objectivity and accuracy of the research. The research results comprehensively evaluated the impact factors from the three aspects of people, land and comprehensive vulnerability, and completed the detailed analysis of the main risk factors, risk coverage and key risk areas in the county. It is found that the areas with high risk of geological disasters are mostly concentrated in the villages and towns in the north of the county, covering a wide area, and the geological conditions of the risk areas are poor and seriously affected by rainfall. The vulnerability of disaster-bearing bodies is directly related to the production, life and property safety of residents. Most of the carriers are located in towns and mountainous areas, which belong to disaster-prone areas in this risk assessment, and should be paid attention to in disaster prevention and prevention.

The terrain and geological conditions in the mountainous area of western Sichuan are complex and changeable. Dangerous rocks are mostly developed in high and steep slope sections, which pose a serious threat to the safety of highway traffic after collapse. Taking the tail perilous rock of Qiaoqi Reservoir in Baoxing County of Ya’an City as an example, the basic characteristics of perilous rock were analyzed by means of UAV aerial survey and field investigation. Rocpro3 D software was used to simulate the three-dimensional kinematics to evaluate the collapse damage. The results show that the formation of dangerous rock in the working area is caused by the combined action of tectonic compression, rainfall erosion and weathering unloading. Strong rainfall and strong earthquake are the typical causes of dangerous rock collapse. The maximum impact energy after the collapse of dangerous rock in the working area is more than 5 000 kJ, and the removal of large-size dangerous rock can effectively reduce the impact energy value. After the collapse of the dangerous rock in the working area, it shows the stage motion characteristics of rolling along the slope → bouncing after hitting the road surface near the surface of the 351 national highway → stopping the accumulation of the riverbed and bank slope of the East River. The treatment scheme of dangerous rock removal+passive protection network+open hole+frame anchor rod can be used for prevention and control.

The social discount rate (SDR) is a critical parameter of investment appraisal and alternative scheme comparison. Through solving stochastic differential equation, a reference formula of measuring the SDR was presented by means of the equivalent return on stock investment and the long-term interest rate. With the data of the main western economies for set by some countries concerned,the SDRs are checked to match the results of the calculation. Such a test proves the feasibility of this approach. In the process of empirical analysis, it is found that there is the quadratic nonlinear regression correlation between the interest rate and the inflation rate, which raises question on the traditional linear rule of determination of the interest rate.

Vibrations generated by subway train operations have the potential to adversely affect the normal use of precision instruments within laboratories. In order to analyze the current state of vibration response at a laboratory site proposed to be built along the subway line, a study was conducted to test environmental vibrations and train-induced vibrations at the site. An integrated seismograph was used to verify the accuracy of conventional velocity sensors at low frequencies. The results indicate that the 941B velocity sensor demonstrates good accuracy for frequency bands above 0.6 Hz, which meets the vibration measurement and evaluation standards based on VC vibration criteria. When considering the comprehensive impact of environmental vibrations within a determined period, the current site’s vibrations are at a relatively low level, essentially satisfying the vibration requirements for most general-purpose equipment and the vast majority of precision instruments. Moreover, the ambient vibrations can significantly increase under the influence of certain instantaneous external vibration sources, but these effects are mostly within the 10 Hz or higher frequency bands. When a subway train passes, there is an increase in vibrational energy near 50 Hz, which is relatively favorable for passive vibration isolation.

With the slowdown of social and economic development and the solidification of social classes, young people in China are also facing severe multidimensional poverty. Based on the CFPS(China Family Panel Studies)2020 data, the AF(Alkire-Foster) method was used to construct the youth multidimensional poverty index through the dimensions of income status, education access, health level, living conditions, social exclusion and subjective well-being, and the relationship between Internet embeddedness and youth multidimensional poverty was explored. It is found that Internet embedding can significantly improve the multidimensional poverty situation of young people, and can indirectly achieve poverty alleviation by promoting the accumulation of social capital.

In order to further analyze the current research status of Chinese academic circles on community governance in the new era, CiteSpace software was used to analyze the number of publications, institutional cooperation, scholars, keywords and other aspects of the research literature on “community governance” collected by China National Knowledge Network (CNKI) from 2012 to 2023. It is found that the number of papers published in the field of “community governance” has generally shown an upward trend, but there are deficiencies. For example, the cooperation between research institutions and scholars is not close, showing an isolated state. Therefore, it is suggested to strengthen the research cooperation and exchange between research institutions and scholars, and use knowledge of various disciplines to study problems from different perspectives.

As an important area of ecological protection and economic development, Dongting Lake Ecological Economic Zone plays a key role in the sustainable development of the Yangtze River Economic Belt. Based on the data of land use and energy consumption, the carbon income and expenditure of county land use in the economic zone from 2005 to 2020 were calculated. Based on the carbon balance analysis and evaluation system, the counties in the economic zone were divided into four types of carbon balance functional zones. The results show that the carbon emission of land use in Dongting Lake Ecological Economic Zone showed a significant growth trend.The carbon emission of land use in the economic zone shows the distribution characteristics of high in the east and low in the west, and the carbon absorption is high in the west and low in the east. Its distribution pattern is closely related to the land use level and energy consumption structure.

Combined with the construction case of the large-span circular steel box girder structure at the visitor reception center of Cuiping Mountain Scenic Area in Yibin City, the principle of high-precision assembly technology and key technical points of large-span circular steel box girders were introduced.3D modeling was used to assist in the factory processing of circular steel box girders, the design and installation of temporary support frames, the precise control of steel box girder hoisting and positioning through BIM(building information modeling) technology in conjunction with total station instruments, and the information-based monitoring of the welding process. These key technological processes have been implemented in the project, which not only shortened the construction period and saved costs but also greatly improved the installation accuracy. This has made the overall assembly of the steel box girder structure smoother and the visual effect of the shape better.