bluuebunny/crossref_metadata_2025_split huggingface dataset:
Field Experimental Research on Application of Strain Special Optical Cable and Parallel Optical Cable
Authors: Shi Ning , Bai Luyao , Ma Yunbin , Li Liangliang , Cao Jinggang 
Published: March 2021

Abstract
With the rapid development of China’s oil and gas pipeline mileage, pipeline construction will be unable to avoid crossing high-risk areas such as disaster risk areas, densely populated areas, environmentally sensitive areas. The traditional extensive pipeline patrol method has been unable to meet the requirements of fine management, which puts forward a new test for the upgrade of safety monitoring technology. In this paper, the distributed optical fiber sensing technology which has been studied intensively in recent years is introduced. Through in-depth analysis of pipeline requirements and characteristics of accompanying optical cable, a single-end BOTDA solution suitable for long-distance oil and gas pipelines is proposed. A 400-meter pipeline trench was excavated along the route of a domestic product oil pipeline. Strain special cables and GYTA53 cables were laid concurrently. Twelve strain monitoring sections were set up using vibrating wire strain sensors. The strain of two kinds of optical cables was monitored under various working conditions, such as partial backfilling, full backfilling, manual compaction and heavy mechanical compaction, as well as the monitoring values of two kinds of optical cable for soil temperature. The test results show that: 1) the strain-sensitive fiber optic cable is sensitive to strain feedback, and can produce rapid feedback to 2m3 pile soil, while the stress feedback of pipeline-accompanying fiber optic cable to soil is very small. 2) The temperature around the pipeline can be accurately reflected by the fiber optic cable, and it can be used for temperature compensation in strain monitoring.
Research and development of ultra-high temperature delayed crosslinking acid system
Authors: Xin Qiao , Pandeng Luo , Zhanqing Qu , Tiankui Guo 
Published: March 2021

Abstract
The average burial depth of carbonate reservoirs in Shunbei area exceeds 7300 meters, and the bottom hole temperature is as high as 160°C. The commonly used cross-linked acid system cannot meet the needs of acid fracturing. Therefore, this article uses AM, AMPS, acrylamide (AM) modified monomers, acrylic acid (AA) modified monomers to synthesize thickener SBCH-1, the organic zirconium crosslinking agent SBJL1 was synthesized with zirconium oxychloride, isopropanol, citric acid and diethanolamine. And other auxiliary agents are selected, and the final formula is determined as: 220% HCl+0.8% SBCH-1 thickener +0.8% SBJL-lcrosslinking agent +0.8% SBYC-1 crosslinking retarder +2% SBHS-1A high temperature corrosion inhibitor +2% SBHS-1B high temperature corrosion inhibitor +1% SBTW-4 iron ion stabilizer +1% SBZP-2 drainage aid +1% SBPR-1 demulsifier. The viscosity of the system stabilized above 200mPa⋅s after continuous shearing at 160°C, 170s-1 for 30min.
Economic analysis of distribution network planning considering decentralized energy storage system
Authors: Lei He , Sang Zixia , Huang Jiaqi , He Jifeng , Yan Jiong , Wang Qixin , Yang Dongjun , Du Zhi , Wu Lei 
Published: March 2021

Abstract
The rapid development of renewable energy makes the power grid gradually change from traditional power system to high proportion renewable energy power system. The rapid development of electric vehicles, energy storage and controllable load increases the uncertainty of load. The flexible adjustable load is less, which can not meet the consumption demand of large wind and solar power generation, and can not support the power valley filling demand when the wind power output is insufficient. Energy storage system is very important for the safe and stable operation of renewable energy internet. How to consider the reliability and economy, this paper proposes a distribution network planning scheme considering energy storage system.
Comprehensive evaluation of community fitness environment in multiple cities based on AHP-DEA integrated model
Authors: Wang Shichao 
Published: March 2021

Abstract
Based on the correlation between AHP and DEA, this study uses five aspects, four levels and 26 indicators to construct the evaluation index system and hierarchical structure model of fitness environment in urban communities along the ancient tea-horse road, and calculate the weights of criterion layer and index layer. the first-hand survey data is used to comprehensively evaluate the fitness environment of 9 urban communities, and the comparison and analysis of the individual cities evaluated are used to provide a paradigm reference for similar research.
A Polarimetric Interferometer Based on Composite Optical Waveguide for Refractive Index Detection
Authors: Du Bin , Mu Xihui , Liu Shuai , Liu Zhiwei , Liu Bing , Tong Zhaoyang , Xu Jianjie , Qi Zhimei 
Published: March 2021

Abstract
A sensitive interference refractive index sensor based on composite optical waveguide (COWG) was developed. Sol-gel technique was used to prepare TiO2 sol, and the TiO2 film was fixed on the surface of single-mode potassium ion-exchange (PIE) optical waveguide (OWG) by dip-coating and annealing treatment to fabricate an interference refractive index sensor device. The interference between the zeroth-order transverse electric (TE0) and magnetic (TM0) modes of the laser beam which transport in the COWG caused phase-difference change (Δϕ) of output light signals. Refractive index sensitivity of TiO2/PIE COWG chip was examined by injecting aqueous NaCl solutions and distilled water in turn to detect its Δϕ. Experimental results show that, for the TiO2/PIE COWG its refractive index sensitivity is SRI = (573.09 × 2π)/RIU in the refractive index ranges of 1.3386∼1.36. The sensor sees the advantages of high sensitivity, compact size, simple fabrication, as well as low cost.
Research on Garbage Sorting in College Campus—Take colleges in Dongguan and Jieyang as examples
Authors: Yuan Wang , Li-li Wang , Zi-kai Chen , Jie-bin Lin 
Published: March 2021

Abstract
This paper made a related survey on the current situation of the garbage in colleges in Dongguan and Jieyang, discussed the main types of garbage on campus, analyzed the attitude and behavior of college students towards garbage sorting and recycling, demonstrated the feasibility of campus garbage sorting and recycling, and put forward constructive suggestions accordingly. Relevant systems should be improved, the campers’ management of garbage classification should be strengthened, publicity should be strengthened, and students’ environmental awareness should be improved.
Study on Dust Concentration Distribution in a Construction Tunnel
Authors: Liu Fangfang , Feng Xiyang 
Published: March 2021

Abstract
At present, dust is not only the main occupational hazard factor in tunnel construction, which seriously threats the safety of production and the health of construction workers, but also an important source of environmental pollution. Taking the working face of a construction tunnel as the research object, the numerical model is constructed with the help of fluid software FLUENT, and the dust distribution law of the construction tunnel is simulated and analyzed, so as to provide research direction for environmental protection and personal health protection. The comparative analysis results of numerical simulation and field measured dust concentration show that the dust in the tunnel construction is easy to accumulate in the lower right side of the tunnel. When the fan mouth is 5 meters away from the working face, the dust concentration within 8 meters near the working face is the lowest. When the fan mouth is 10 meters away from the working face, the dust diffusion range is the longest and it is not easy to accumulate.
Simulation of Atmosphere Temperature of the 20th Century in 50 US State Capitals with Random Walk
Authors: Yan Shaomin , Wu Guang 
Published: March 2021

Abstract
Although humans have been recording the temperature for about 200 years, the temperature in the 20th century is more important because the trend of increase of temperature was observed. The increasing temperature has been the objective of many studies across natural and social sciences. The similarity between the temperature and the curve generated by the random walk model was noticed in 1991, since then, however, very few studies have been conducted along this research line due to the limitation of computational power. In this study, we use the random walk model to simulate the atmosphere temperature of the 20th century in 50 US state capitals in terms of converting the temperature into its simplest form with random walk simulation as well as the recorded temperature. The results show that the random walk model can simulate the simplest form of temperature and recorded temperature satisfactorily.
A New Strategy for Comparison of Land Surface Temperature Retrieval Methods with Landsat Remote Sensing Images Considering Regional Consistency
Authors: Qingyu Xu , Xiong Xu , Huan Xie , Xiaochun Zhang , Yuting Huang 
Published: March 2021

Abstract
Landsat remote sensing images are widely used in fields such as land surface temperature retrieval, urban expansion, and urban heat islands, due to their high spatial resolution and the availability of long time series data. Long-term land surface temperature (LST) change analysis usually requires comprehensive utilization of remote sensing data from different sensors, such as Landsat 7, Landsat 8. A LST retrieval algorithm with generalization for Landsat thermal infrared image can effectively improve the reliability of long-term analysis using multi-source images. In order to evaluate the performances of different LST retrieval methods for Landsat images, a new strategy based on regional consistency was proposed in this paper so that different LST retrieval algorithms can be compared with each other without utilizing reference data from ground observation. The general hypothesis is that there is a significant positive correlation between the obtained Landsat 7 and Landsat 8 LST products with adjacent imaging time, similar imaging environment for the identical area. Firstly, the Landsat 7 and Landsat 8 image pairs from Shenzhen were selected under aforementioned constraints. Secondly, four representative LST retrieval methods, radiative transfer equation method (RTEM), image-based method (IBM), mono-window algorithm (MWA) and single-channel algorithm (SCA) were used to generate the LST products from the Landsat 7 and Landsat 8 image pairs respectively. Lastly, the correlation between the Landsat 7 and Landsat 8 LST products from different methods can be calculated as different indexes, including the goodness of fit, Pearson correlation coefficient and Euclidean distance. It is convincing that the optimal LST retrieval method should exhibit a higher regional consistency between the Landsat 7 and Landsat 8 LST product pair given the certain area. The experimental results show that the radiative transfer equation method generates the highest correlation and it is considered as a suitable option for long-term LST research with multi-source Landsat datasets.
Research on Application of Blockchain Technology in Departure Audit of Natural Resources Assets
Authors: Zhou Guangxiu 
Published: March 2021

Abstract
Blockchain technology is the first underlying support technology applied to bitcoin. In recent years, it has formed a “blockchain +” technology mode, entered various fields of economic and social development, and promoted the further integration of blockchain and real economy. As early as 2015, General Office of the State Council issued the “Implementation Opinions on Implementing the Audit Full Coverage”. There are still many difficulties in auditing the natural resources assets of leading cadres, which represents the general trend of economic responsibility. This paper studies the related issues of the combination of blockchain and natural resource assets departure audit, and discusses the development prospect of blockchain audit technology, in order to comply with the historical change of full audit coverage.
Research on Optimization of Carbon Emission Reduction of Coal Supply Chain System in Iron and Steel Industry
Authors: Yang Wei , Abu Munai , Sha Jiemin 
Published: March 2021

Abstract
The steel industry is an important basic industry for the development of the national economy and national defense construction, but it is also a major source of energy consumption and environmental pollution. In particular, the carbon emissions in the process of coal combustion and steelmaking are huge. This situation urgently needs to be improved and optimized. Therefore, based on the perspective of the coal supply chain in the steel industry, this paper constructs a multi-objective planning model to achieve a balanced optimization of total economic costs and carbon emission reduction, and verifies the effectiveness of the model through specific case data. This paper sets three different emission reduction scenarios, discusses and analyzes the changes of economic total cost and carbon emission under different emission reduction scenarios, and finds that suppliers with good coal mining technology and low carbon emission factor have more opportunities to be selected and can obtain more coal market orders. At the same time, steel plants with mature processing technology and low carbon emission factor can further gain market competitive advantage and undertake more steelmaking tasks. Finally, based on results, management suggestions for coal suppliers and steel plants are provided.
Study on Location Selection of Low-Carbon Fresh Fruit Distribution Center Considering Customer Satisfaction-Route Optimization
Authors: Li Zongxin , Fu Yingjun , Li Meiyan 
Published: March 2021

Abstract
With the development of society and the needs of consumers, the concept of low-carbon and the improvement of customer satisfaction have become the focus of enterprises. Cold chain logistics is a product with high energy consumption and perishable characteristics, this paper will consider improving customer satisfaction on the basis of low carbon, and establish a cold chain distribution center location-routing optimization model with the minimum total cost as the optimization objective. The mathematical model is constructed and solved by using bi level programming theory and genetic algorithm, and neighborhood search is added to the lower model to optimize the route structure. Finally, the simulation results show that the final cost of considering carbon emissions and customer satisfaction is less than the cost of only considering the shortest route.
NetworkPlanning of Regional EnvironmEntal Monitoring System in Modern City
Authors: Li Yijie 
Published: March 2021

Abstract
Based on the network planning of urban regional environmental monitoring system, the network of urban regional environmental monitoring is established. Through data collection and data analysis of regional environmental system, the network framework of urban regional environmental system is formed and analyzed from multiple perspectives. Through comprehensive and perfect environmental monitoring analysis methods, the effectiveness of urban regional environmental system network is improved, the urban regional environmental management and environmental assessment are discussed, and the network planning and layout of environmental monitoring and environmental management system are realized. This paper analyzes the relevant environmental monitoring data from many aspects, and gives the urban regional environmental monitoring system and reasonable structure.
Prospect and Economic Development Analysis of Prefabricated Building Industry in An Ethnic Minority Area
Authors: Zhao Yuhe , Fang Guangxiu 
Published: March 2021

Abstract
By comparing the prefabricated building industry with the traditional construction mode, national policies and development planning of the prefabricated building industry were combined to analyze the development advantages and economic benefits of the prefabricated building industry in Yanbian Korean Autonomous Prefecture, Jilin Province, and meanwhile, its development prospects were given, thus providing a reference for the development of prefabricated building industry and economic development in similar ethnic minority areas.
Structural Elements, Synergy Mechanism and System Optimization of Atmospheric Environmental Self-cleaning Capability
Authors: Zhou Jingkun , Li Yating 
Published: March 2021

Abstract
On the basis of defining the connotation and structural elements of atmospheric environmental self-cleaning capability, this paper systematically analyses the synergy mechanism of atmospheric environment self-cleaning capability, and puts forward the system optimization of atmospheric environmental self-cleaning capability. The self-cleaning ability of the atmospheric environment mainly includes nature’s ability to cleanse itself and rationality of human design. The synergy mechanism of self-cleaning capability of nature mostly refers to the fact that pollutants in the atmosphere can be transformed chemically or scavenged by means of the dry deposition, wet deposition, transportation and dispersion of atmospheric hydrometeors, such as rain, snow, wind, geography, humidity and the like. The synergy mechanism of rationality of human design chiefly refers to the human ability to take a variety of comprehensive prevention and control measures such as reasonable urban planning, wind tunnel design, hydraulic facilities, pollution source layout and others to make the most of nature’s self-cleaning capability and the ability to reduce the impact of the atmospheric pollutants. On this basis, seven measures have been proposed system optimization of atmospheric environmental self-cleaning capability. First, we should quicken the construction of artificial wetlands in areas with lower atmospheric self-cleaning capability; second, we should rapidly improve the vegetation coverage rate in the areas with low atmospheric self-cleaning capability; third, we should systematically plan urban construction in areas with lower atmospheric self-cleaning capability; fourth, we should scientifically construct urban air ducts in the area with low atmospheric environment self-cleaning capability; fifth, we should work out scientific production plans for the pollution intensive industries and gradiently transferring pollution intensive industries; sixth, we should vigorously propel the ecological migration work in areas with lower atmospheric self-cleaning capability; seventh, we should strengthen the construction of a linkage system of atmospheric environment self-cleaning capability.
Research on vehicle recycling based on ELV Directive
Authors: Li Chuan Jie , Yang Wen Xuan , Liu Xiao Dong , Wang Yan Meng , Feng Shi Hao , He Yong Ao 
Published: March 2021

Abstract
Based on researches on ELV directive at home and abroad, this paper developed an ELV directive-based vehicle recycling test program and offered solutions for the government and enterprises to manage end-of-life vehicles. The vehicle ELV test realized the verification by tests and scrutiny of the ELV directive and the self-inspection of enterprises, and improved the ELV management system.
The Characteristics and Geographical Features of Plant Populations in the Forest Region of Wanda Mountains
Authors: Li Jialin , Yang Jiao , Sun XueWei , Luo Jincheng , Qiu Hongbin , Li Lan 
Published: March 2021

Abstract
The study of species diversity and fauna characteristics in the Wandashan area is of great significance for the protection and utilization of plant resources in the future. The relevant characteristics and characteristics of species diversity in the Wandashan area are analyzed. The various species diversity indices of the Dashan area are calculated, reflecting the species richness, dominance, uniformity and the information volume and community complexity of the Wandashan area. Through Matlab, the location of each plot in the Wandashan area and the species diversity index of Joe, Irrigation, Grass and all species are represented in the form of graphs, reflecting the different species diversity indices in other areas of the mountainous region. Changes combining the results of the field survey with the existing literature, the floristic analysis is carried out to obtain the characteristics of the flora of the mountainous area, and reflec the information about the species diversity of the mountainous area. Through the similarity coefficient comparison and analysis of plant distribution, the relationship between the flora of Wandashan, Changbai Mountain and Xiaoxing’anling was determined. The results of flora analysis show that the flora of the Wandashan area belongs to the North Temperate Zone and has a general connection with other floras in the world. The flora of Northeast China mainly includes Xiaoxing’anling area, Wandashan area and Changbai Mountain. By comparing the similarity coefficients at the three levels of families, genera and species, it can be seen that the similarity coefficient between Xiaoxing’anling and Wandashan is higher than that between Changbai Mountain and Wandashan.
Flexible printed single-walled carbon nanotubes olfactory synaptic transistors with crosslinked poly(4-vinylphenol) as dielectrics
Authors: Li Min , Deng Jie , Wang Xin , Shao Shuangshuang , Li Xiaoqian , Gu Weibing , Wang Hua , Zhao Jianwen 
Published: March 2021

Abstract
Flexible brain-inspired neuromorphic transistors are spring up in the scopes of artificial electronic skins and human-interactive electronics for wearable devices and robotic applications benefiting from the capability of synchronous recognition and processing of the external information. In this work, we reported the flexible printed single-walled carbon nanotube (SWCNT) synaptic thin film transistors (TFTs) with printed silver electrodes as source/drain and gate electrodes, and the solid state electrolyte blending ionic liquids with crosslinked-poly(4-vinylphenol) (c-PVP) as dielectric layers. Our flexible printed SWCNT synaptic transistors display excellent electrical properties, such as low operation voltages (between ±1 V), high on/off ratios (>106) and low off currents (∼10−12 A), as well good stability and good mechanical flexibility. These flexible printed SWCNT TFT devices can imitate some typical synaptic plasticities like excitatory postsynaptic current and paired-pulse facilitation. The results indicate that synaptic behaviors of flexible devices are related to weight concentrations of ionic liquids in ionic c-PVP insulators. Moreover, our synaptic transistors can imitate the olfactory neurons and show the inhibitory characteristic when triggered by under a series of electrical stimulations after exposure to NH3.
Physical explanations of Einstein’s gravity
Authors: Robinson V N E 
Published: March 2021

Abstract
Einstein’s gravitational field equations from his general theory of relativity have formed the foundations of gravitational studies since their publication. His work is widely acknowledged as an example of a theoretical study that made a great contribution to our understanding of gravity. Einstein’s mathematical approach has made the topic complex and open to misinterpretation. This study evaluates the physics upon which his mathematics operates. It shows that mass distorts space–time by the redshift of photons. It derives two alternative metrics to the Schwarzschild metric. One was derived directly from Einstein’s early work on gravity. The other was derived from Einstein’s field equations by removing the approximations introduced in the Schwarzschild metric derivation. Both match observation better than the Schwarzschild metric and show why Einstein did not believe in black holes. The metric derived directly from Einstein’s early gravitational study, predicts the torus shape shown in the Event Horizon Telescope collaboration image. In showing the physics involved, this study suggests it is easier to understand the complexities of his work.