bluuebunny/crossref_metadata_2025_split huggingface dataset:
Application of the Principles of Landscape Ecology in Land Consolidation Engineering
Authors: Xiong Yufei 
Published: April 2021

Abstract
Through the application of land consolidation, can greatly improve the rural land pattern, so that its land use efficiency can be continuously improved, which has an important role in the improvement of people’s living standards, is the current we must pay attention to the content. But from a practical point of view, in the practice of land consolidation, there are still a variety of problems, many ecological environment related factors are not paid attention to, resulting in many unnecessary losses, hinder the sustainable development of the economy. As a new interdisciplinary subject, the application of landscape ecology in land consolidation can play a huge role, which is the necessary guarantee to improve the effect and value of land consolidation.
Application of Fractal Theory in Concrete Research
Authors: Zhang Yichao , Zhang Zhongren , Zhou Jinghai , Zhao Liang , Liu Jiaxi 
Published: April 2021

Abstract
Fractal theory is a powerful tool to deal with chaotic and disordered phenomena and behaviors in nature. In recent years, it has been widely used in the research of concrete internal structure, and has achieved a lot of remarkable results. This paper introduces the origin and definition of fractal theory, summarizes the application status of fractal theory in the research of concrete pores, cracks and aggregates, analyzes the existing problems in the current research, and looks forward to the future development trend.
Application of BIM Big Data in Construction Engineering Cost
Authors: Huang Xinyao 
Published: April 2021

Abstract
At present, BIM technology is applied in China to improve the level of project management, and it is an irreversible trend to popularize BIM technology in the construction industry. In the era of big data, project cost management has also become a refined management with the development of technology. Therefore, BIM technology improves the frequency of using big data in project cost management, thereby reducing project management costs and improving project value. BIM technology has been widely used in construction cost management, so we will make an in-depth study on the application of BIM to construction cost based on big data construction projects.
Research on Random Modelling of Computer Multi-sample Redundancy in Nonlinear Mathematics Stochastic Finite Element
Authors: Sun Jie , Han Yunna 
Published: April 2021

Abstract
The stochastic problems of engineering structures are generally simulated by stochastic finite element method. Based on the non-linear mathematical random method, the paper proposes the concept of multi-sample redundancy based on Bayesian network and the concept of redundancy compression algorithm. A Monte Carlo stochastic finite element method based on Bayesian network redundancy compression algorithm is established. The modelling process of Bayesian network redundancy compression algorithm is explained in detail through two examples. The Bayesian network redundancy compression algorithm model provides a new strategy for multi-sample system reliability analysis, which can conveniently implement system reliability calculation, fault diagnosis, importance analysis and other applications. If the constructed Bayesian network redundancy compression algorithm satisfies that all non-root nodes have two parent nodes, the reliability solving process of the multi-sample system only needs O(Nm3) computational complexity.
Difference analysis of in-service hydrostatic test for second and third generation PWR
Authors: Zhang Zhenguo , Feng Huixing , Zhao Weihua , Li Maochao 
Published: April 2021

Abstract
Hydraulic test of nuclear power plant is an important part of in-service inspection of nuclear power plant, and it is one of the important technical means to test the pressure bearing capacity of equipment. In this paper, the technical requirements of the second generation PWR based on safety classification and the third generation reactor based on radioactive release classification are discussed from the aspects of equipment classification, primary circuit hydrostatic test, steam generator secondary side hydraulic test, hydrostatic test of vessel and pipeline, as well as the difficulty of implementation in hydrostatic test.
Comparative analysis of the efficiency of manual adjustable pitch propeller and fixed pitch propeller based on dual-scale coupling
Authors: Ma Xu , Wang Chengjun 
Published: April 2021

Abstract
In order to solve the problem of ship, engine, and propeller mismatch between the first manufacturing of a new type of ship and the long-term service of the ship, the idea of dual-scale coupling simulation is used to establish the meso-scale and macro-scale mathematical model of a manually adjustable pitch propeller. The thrust coefficient and the torque coefficient are the coupling points. A comparison calculation between the manual adjustable pitch propeller and the fixed pitch propeller is carried out on a small ship as an example. The results show that the manual adjustable pitch propeller could compensate for the efficiency deviation caused by the fixed pitch propeller design; When the ship’s resistance increases or the ship’s main engine power decays, the measures of adjusting the pitch and turning angle of the blades could effectively improve the efficiency of the propeller and the ship’s speed, which indicates that the manual adjustable propeller has better adaptability than the fixed pitch propeller.
Parameterized Structure Design of Giant-magnetostrictive Disc Brake
Authors: Chu Changbao , Xu Qing , Jia Xingjian , Zhang Xingwang , Xiao Yue 
Published: April 2021

Abstract
Brake is one of the important components of automobile braking system. The speed, safety and stability of its performance are the important evaluation indexes of automobile braking system. The existing brakes have some shortcomings in these aspects. The paper designed a new type of disc brake, which has the advantages of faster response speed, stronger reliability and simpler structure compared with traditional brake. At the same time, it provides a new idea for the design of disc brake.
Simulation Research on Roll Forming in Container Roof
Authors: Liu Huamin , Li Shefei , Cao Junjie , Wang Jing 
Published: April 2021

Abstract
The finite element simulation of the roll forming process of the container roof is carried out, and the stress, strain, and history curves of key nodes are analyzed. It is proved that the rolling process will produce edge wave and wrinkle defects in the flat section, and the influence of parameters on the edge wave wrinkle is studied. Studies have shown that: the length of the transition section increases, the number of wrinkle decreases; the distance between the arches increases, which suppresses the generation of side wave defects, but after more than 350mm, the effect on the side wave remains unchanged; the width of the sheet edge increases, and the side wave defects follow the increase.
Design and comparison analysis of powder metallurgy press manipulator
Authors: Zhang Hua , Zhang Liguo , Zhao Lei , Hu Lai 
Published: April 2021

Abstract
In the powder metallurgy pressing process of a certain company, when processing sharp-angled parts, it uses the chute type reclaiming method, which will cause bumps on the workpiece. In response to this problem, an integrated reclaiming manipulator was designed. The overall structure of the manipulator, pallet silo structure, manipulator structure, robot servo motor selection calculation, reclaiming silo structure, pneumatic system, overall electrical control, PLC program, Detailed design of man-machine interface. Through the operation test, the reclaiming manipulator can well meet the needs of the enterprise, operate stably and reliably, reduce labor, improve product quality, and increase production efficiency.
Study of needle seeding machine vibration system
Authors: Tian Wei , Song Bowei , Du Ren 
Published: April 2021

Abstract
Make analysis of the vibration system in the needle tray seeder and make plate’s vibration simplified as a single degree of freedom spring damping system under harmonic excitation forced vibration. Get the amplitude frequency characteristics of plate vibration. Make analysis of seed vibrating in the air, get the condition that seeds to be absorbed.
Research on intelligent integrated shoe cabinets
Authors: Xu Jingfeng , Cao Xuewei , Wang Chengzhi 
Published: April 2021

Abstract
The invention designs a smart storage shoe cabinet for the existing home storage shoes, which can bring convenience to the family to access the shoes. Mainly divided into storage module and shoe rack module, the two are independent of each other, according to the size of the household and the needs of the household shoe cabinet, the storage module and drive module for combined deformation and unitization treatment.
Research on a small rice car for Southwest China
Authors: Xu Yanhua , Zhang Zhiyong , Lu Minxi 
Published: April 2021

Abstract
According to the special terrain of terraced fields in the southwest, a small integrated rice cart is designed, which consists of rice cutting device, rotating guide device, transmission device, rice beating device and vibrating screen device. The whole device is coordinated and cooperated with each other, which integrates rice cutting, rice feeding, rice beating and rice collection, improves working efficiency, reduces labor intensity and saves manpower and material costs. Rice cutting device, rice beating device, etc. can complete the whole process of rice cutting and collection, and thresh directly, so as to avoid the loss of grains caused by too many intermediate steps. The design of triangular wheel treads makes the rice cart convenient for cross-floor operation and more suitable for terraced terrain. The whole integrated rice cart not only breaks through the constraints of environmental factors such as terrain, but also avoids the complicated process of manual rice harvesting. Moreover, the device is relatively small in size and quality, has strong adaptability, improves the efficiency of harvesting rice, reduces the labor intensity, avoids the loss of seeds caused by intermediate processes such as transportation operations and field operations, and has good energy saving and emission reduction benefits.
Air Water Collector based on Chimney effect
Authors: Zhou Changqing , Liu Zichuan , Yun Hanfang , Zhang Zeling , Cao Xuewei , He Shiji 
Published: April 2021

Abstract
The main research content of this project is the water recovery efficiency of the hot-pressure-driven air water-taking device when the phase-change material is used for energy supply, and combined with the research process, an automatic water-taking device using desert temperature difference and phase-change material storage is designed. At a time when energy sustainability is of great concern, we must make the development of green energy a core goal. Among them, solar energy as a green non-polluting new energy, its development and utilization is an important research topic and direction. The desert areas have plenty of solar energy and enough temperature differences to take advantage of these two resources and combine the lack of fresh water in the area. The purpose of this project is to design a device that uses phase-change materials to store heat to provide heat pressure, guide air directional flow, and use high-efficiency coaxial water collection sails for air water collection, with less human and material input, to obtain the fresh water necessary for life. And from the theoretical and physical level to demonstrate its feasibility, explore the direction of marketing.
Multi-stage Vibrating Screen Mulching Film Removing Device Based on Plastic Thermoplastic Principle
Authors: Zhang Zhiyong , Lv Shaowei , Xu Yanhua 
Published: April 2021

Abstract
In view of the increasingly serious agricultural white pollution, this project has designed a multi-stage vibrating screen film removal device based on the principle of plastic thermoplasticity. The whole is installed behind the seeder body and works in cooperation with the seeder. The device is composed of a film gripping module, a deep turning module, a crushing module and a graded vibrating screen module, and realizes the process of bringing out the film in the soil, crushing it, fining it and finally collecting it. At the same time, according to the state of the recovered film, a graded vibrating screen module is designed. The first-stage vibrating screen can transport the soil and film to the second-stage vibrating screen device, and the second-stage vibrating screen device separates the film by using the thermoplasticity of the mulching film by heating, so that the film can be better separated and recovered. The novel high-efficiency mulching film removing device can avoid the problem of low efficiency of traditional manual recovery. Compared with the existing device, it improves the rate of removing mulch film, effectively reduces the influence of residual mulch film on the environment, lightens the white pollution, and has good energy saving and emission reduction benefits.
Research on Assistive Devices for the Elderly to Urinate and Defecate
Authors: Yan Zhen , Cheng Tianyi , Zhou Jie , Cao Cong , Tao Ye , Xu Yufeng , Wang Zihan , Shao Xinzhe 
Published: April 2021

Abstract
At present, the aging problem is becoming more and more serious, the number of empty nesters living alone is increasing, and the toilet falls of the elderly often occur. The existing protective device has single function, insufficient protective effect and low humanization. To this end, we designed a humanized device to assist the elderly living alone in toilet and daily activities..
Research and Application of Comprehensive Evaluation of Engineering Sweet Spot in Block LX
Authors: Zhang Liang , Li Yu , Yang ShengWen , Zhao Zhanjiang 
Published: April 2021

Abstract
Block LX is a tight sandstone gas reservoir with low porosity and low permeability, and there are the problems of a sharp decline in production and a poor utilization degree of superimposed reserves in the longitudinal gas bearing sand body within a few years after the initial fracturing, which leads to the difficulty of gas field production replacement under the condition of high comprehensive decline rate. By analysing the effect of reservoir characteristics and rock mechanical properties on volumetric fracturing, combined with geological logging data and rock mechanics experimental data of tight sandstone reservoir in Block LX, the paper tries to study the adaptive effect of volumetric fracturing technology in Block LX. The adaptability of volumetric fracturing is evaluated by software simulation of fracturing effect to determine the optimal fracturing construction parameters before the volumetric fracturing gas test is carried out on three wells. The gas test results show that the daily gas production is increased by more than 46.01% compared with that before volumetric fracturing, and the fracturing effect is good. Therefore, it is feasible to use volumetric fracturing technology to overcome the difficulty of low permeability and low gap in Block LX to improve gas production.
Development of processing maps for DC cast 7065 aluminum alloy
Authors: He Kezhun , Tan Zimeng , Zheng Xu , Zhang Xinming , Chen Biao , Zhou Kechao 
Published: April 2021

Abstract
The deformation behavior and microstructure evolution of DC cast 7065 aluminum alloy was studied in the temperature range of 340-460 °C and strain rate range of 0.1-8 s-1. Processing maps were developed to evaluate the efficiency of the hot deformation and to identify the instability region. The results show that the optimum range of processing conditions are in the strain rate range of 0.01-0.1 s-1 and temperature range of 380-410 °C, where the efficiencies are much higher when compared to other regions. The peak efficiencies for the 7065 alloys is evaluated in the region of T=380-460 °C and ε=0.01-0.1 s-1. Recrystallized grain was observed under these deformation conditions. The dynamic softening is more pronounced at higher deformation strain rate and deformation temperature.
Precision Distribution of Turntable Gear Transmission System of Aero-engine Blade Processing Machine
Authors: Xiong Fengkui , Zhang Ming , Yin Yihui , Liu Kang 
Published: April 2021

Abstract
In the previous design and research on the gear transmission error of the five-axis machine turntable, the selection of the five-axis machine tool turntable gears mainly uses the high-precision gears to avoid excessive transmission errors of the turntable, to meet the design requirements of the turntable. However, the cost of the turntable manufacturing is increased and it causes excess precision and unnecessary waste. In meeting the requirements of accuracy, it is important to distribute the gear transmission error of the turntable reasonably, to avoid the high manufacturing cost of the five-axis machine, improve the technical quality of the five-axis machine turntable and reduce its cost. This paper presented the self-developed five-axis machine turntable for aero-engine blade processing as the carrier, and the optimized genetic algorithm is used as the tool to allocate the precision of the gear transmission system. While to meet the design and use requirements, the gear accuracy level is reduced. The manufacturing cost of the turntable goes down.
An Optimal Model for Quality Inspection Station Setting
Authors: Li Qing 
Published: April 2021

Abstract
The quality of products depends on the process of product processing, so controlling the quality of products during processing is an important measure to ensure the final quality of products. The article aims at the problem of setting up inspection stations in the manufacturing process correctly. Through the analysis of the total cost and total processing time, taking the minimum total production cost and total processing time as the objective function, the optimization setting model of quality inspection station is established, and the particle swarm optimization algorithm is used to solve the model to determine the location of the inspection station in the product processing process and quantity. The effectiveness of the model is verified through the production process of automobile crankshaft as an example.
Dislocations arrangements in magnesium matrix composites
Authors: Zhang Xiuqing 
Published: April 2021

Abstract
Magnesium matrix composites reinforced with TiC particulates was successful synthesized by in-situ synthesis method. The dislocation arrangements in the composites have been investigated. Compared to magnesium alloy, there is high dislocation density in the composites. Besides dislocation network, dislocation pile-ups have been found in α-Mg and β-Mg17Al12 phases. They are confined in the slip planes, and some of them pile up against the grain boundaries. The dislocation arrangements in the composites are due to the addition of TiC particulates. Moreover, the compound twin reveal in the casting composites, which is beneficial to the deformation behavior of the composites.
Intelligent integrated multifunctional vegetable cutter system
Authors: Huang Yi , Xu Junze , An Yida 
Published: April 2021

Abstract
With the continuous development of the Internet of Things technology, people’s requirements for quality of life are gradually improving. However, cutting vegetables is still a manual work with low efficiency. Food processing has many shapes, high requirements, time-consuming and labor-consuming, and there is a certain risk factor. Therefore, a new type of vegetable cutter is designed. After the objects are loaded in the feeding box, they are conveyed and fixed, so that the device can automatically press, cut and drive vegetables, and make artificially desired slices, filaments, blocks, peels and the like according to different requirements of dishes, which is small in size, low in noise, safe and convenient.
Cable deicing device based on ice melting and mechanical ice breaking
Authors: Yu Tianxiang , Qiao Lingfeng , Liu Xu 
Published: April 2021

Abstract
In recent years, it is not uncommon for high-voltage cables to freeze and break due to extreme weather, which has a great impact on power transmission and caused countless economic losses. At present, the de-icing methods on the market all have certain limitations. Therefore, this paper designs a de-icing device that uses thermal ice melting and mechanical ice breaking at the same time, which can reduce the difficulty of ice breaking and damage to cables by heating ice layers, and spray special coatings to prevent icing again after ice breaking. This device has higher adaptability to cable de-icing and can better meet the needs of de-icing.
Mechanical test of thermoelectric device in RTG prototype
Authors: Liu Yang , Wu Chunyu , Li Yang , Yang Shuaifei , Wang Shuyang , Dong Yu , Liu Shichao , Jin Yang 
Published: April 2021

Abstract
Since the United States launched the first space radioisotope thermoelectric generator (RTG), the United States has launched a total of 28 spacecraft with 43 RTGs. There are still more than 30 RTGs in orbit, and the longest working life has exceeded 30 years. During the launching process of RTG, the thermoelectric energy converter needs to withstand the impact at start up and high-frequency vibration during flight, and it faces the harsh service conditions that heat, force, electricity and other external fields are used and coupled together. For this reason, this paper has carried out environmental test verification on the designed RTG prototype through vibration and shock tests. By applying shocks of the same magnitude as the launch and vibrations of the same magnitude during flight, it is found that the thermoelectric devices loaded inside are in the experiment. There is no obvious change in the internal resistance before and after, indicating that the installation method can withstand the complex mechanical environment test during launch, which provides a reference for RTG’s thermoelectric device loading method.
The floaters for submarine-cable landing and its engineering applications
Authors: Zhang Zhigang , Zhang Ping , Ding Zhaogang , Gong Yanqiang , Zeng Hao , Liu Zhen 
Published: April 2021

Abstract
The floater can be employed to provide additional buoyancy to the submarine cable during its landing to ensure its routing and connection with the onshore connectors. With the update of the voltage-class of the submarine cable, to ensure the efficiency and quality of the landing operations, the floater has been changed from the traditional waste tires to the new types of pre-fabricated floaters. In this paper, the characteristics of different floaters will be introduced and compared with the engineering applications. The development trends of the floaters for submarine-cable landing are proposed.
Energy-Saving and Environmental-Friendly Gymnasium Project Evaluation Research
Authors: Zhang Aiping 
Published: April 2021

Abstract
As a complete urban space individual, the gymnasium must be considered to build energy conservation and environmental protection requirements. Based on this research background, the thesis analyzes whether it can be energy-saving and environmentally friendly by exploring natural ventilation technology and intelligent lighting for green buildings, using CFD and airpark combined with thermal comfort and body temperature. Research has shown that through the CAN bus intelligent lighting system, combined with the opening and closing of the building gymnasium roof to meet the ventilation conditions, the gymnasium’s necessary energy-saving and environmental protection can be realized.