To further study the location problem of the entrances and exits of the community, based on the shortest path algorithm to obtain the shortest distance between any two points. According to the actual situation of the community location, the proportion of parking spaces in different parking areas in a theme park is weighted analyzed by the method of proportion coefficient, which is used as the weight coefficients of each corresponding shortest path in the traffic network diagram. Finally, taking the minimum path weighted value of the vehicle into and out of the community as the goal, the location model of theme park gateway is constructed, and the location scheme of the community entrance and exit is determined. At the same time, the research on the location of the entrance and exit of the Dong daqiao community in Chaoyang district of Beijing is used as an application case of this algorithm, the result shows that using weighted shortest path algorithm to determine the community entrance and exit can minimize the distance cost of the vehicles, which can effectively save travel time, and improve the travel efficiency of the travelers.

With the continuous development of China's economy, the energy-efficient building and green building initiative of China has increasingly become the concern of people at home and abroad, inside and outside the industry. Firstly, this paper analyses and compares the application background of two green certification systems, LEED in the United States and GBES in China. Then, we study the annual number, regional distribution, level distribution and regional distribution of professional certification personnel of GBES and LEED certification programs. The results show that the number of green certification projects in China is increasing rapidly yearly, but there are some regional differences. The overall certification level is 2 star (gold level), and there's no match for the green program for the less qualified professional. Based on the above situation, this paper puts forward corresponding development suggestions. Firstly, on the basis of policy and financial support, the comprehensive development of green certification programs will be gradually promoted from the developed regions to the developing regions and from the south to the north. Secondly, we should promote the development of two-star (gold) certification programs with moderate incremental costs and good ecological benefits. Finally, it is necessary to fully introduce and increase the number of professional certification personnel and consulting agencies of certification.

The spatial interpolation method is of great sign ificance for the spatial distribution of heavy metals in soil and the prevention and control of pollution. However, different interpolation methods are applied to predict the accuracy of different heavy metal pollution distributions in small-scale areas with a single farmland. There is no relevant argument. Taking a farmland (96000m2) in Lanping County, Yunnan Province, Yunnan Province as the research object, 144 surface soil samples were collected and the contents of Pb and Cd in soil were determined by ICP-MS. The deterministic spatial interpolation method and geostatistical Kriskin interpolation method were used to investigate the accuracy of different interpolation methods and the distribution characteristics of Pb and Cd in soil. The results show that the optimal interpolation methods for heavy metals Pb and Cd in polluted farmland are 0-order ordinary Kristen interpolation method, and the content of Pb and Cd in the soil is relatively accurate. This study will provide important basic information for the identification of spatial distribution characteristics of different heavy metals in small-scale areas with a single farmland, which will help to comprehensively evaluate the function of spatial interpolation to identify spatial distribution information of heavy metals.

In the construction of the main beam of the PC plate type stiffening beam suspension bridge, the problem of tensioning construction of super-long prestressed steel bundles, combined with the Moon Bay Bridge with the main span of 465m, introduces the whole process of prestressed steel beam piercing and tensioning of the main beam. And the problems existing in the tension construction were analyzed. The construction of the Moon Bay Bridge was successfully completed, and its construction method can provide reference for similar bridge construction, which has certain reference significance.

Aviation safety is the focus of aviation field. In this paper, two different heating ways of modulated lasers were used to heat the aviation carbon fibre composites with internal defects. The results show that, after expanding, the unevenness of laser energy distribution has a great influence on the detection effect. In order to solve this problem, we obtained the reference temperature information by using the defect-free surface inside the specimen. After the difference between the obtained temperature information of the internal defect surface and the internal defect-free surface, the internal defect information of the specimen was successfully presented. At the same time, it is found that compared with the square wave heating, the effect of sine wave heating on detecting the internal defects of the specimen is more obvious. There are two main advantages of using laser infrared thermography to detect aviation carbon fibre composites: (1) the detection time is short, which only need a few seconds to complete the detection process; (2) the heating area can be adjusted by the distance between the specimen and the laser, which will make the detection more flexible.

The shoulder groove project of Wudongde dam is a key program of the entire Wudongde Hydropower Project. The slope of the dam project is centered on the dam shoulder groove, where the upstream is the upstream shoulder and the power station intake, and the downstream is the downstream shoulder, plunge pool, second dam and downstream revetment. Therein, the excavation quality of the dam shoulder groove directly affects the long-term safety of the dam operation. The dam shoulder groove excavation elevation is 988m-718m, with the excavation height of about 270m, the excavation width of 18.32-51.42m, and excavation slope ratio of 1:0.21-1:9.2. The slope changes from steepness to slow, and there is no horse track set in the middle. Since the excavation quality directly affects the long-term safety of the dam operation, this paper deeply analyzes the influence factors of the relevant quality control requirements such as over-under-excavation, flatness, half-hole rate and blasting depth of the dam shoulder groove project of Wudongde Hydropower Station through integration and modularization of its key processes. This paper has a certain practical significance for the formation of the theoretical system and practical foundation of quality control technology for abutment trough of high slope dam of large hydropower station.