bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on Plastic Waste Pollution Based on Coupling Model
Authors: Lian Ruhui 
Published: January 2021

Abstract
In order to discuss to what extent plastic waste can be reduced to reach an environmentally safe level, we establish the coupling model of safety level and reduction degree, to study the relationship between the reduction degree of plastic waste and the environment safety level. In this model, we have introduced the Public Environmental Awareness Index, the disposable plastic waste recovery rate, and the effectiveness of policies to limit the use of disposable plastic, which constitute the Plastic Waste Reduction Index (DRL). Based on this, six indicators closely related to plastic waste were determined from three aspects, which are included in the environmental safety level index (ESL) by entropy method. Then, the grading evaluation table of environmental safety level was established based on the references. And through Pearson correlation analysis, we found that the level of environmental safety and disposable plastic waste reduction has a high correlation. Then we choose the European Union as the research object, and study the changes of ESL and DRL in the past ten years. Finally, we test the model by Correlation Coefficient analysis, the results show that our model is reasonable. Then through the calculation of the critical point, in order to make the environment reach the safe level, the degree that the disposable plastic waste should be reduced is obtained.
Research on Sea Surface temperature Reconstruction from long-term MODIS data
Authors: Zhou Yan , Gai Yingying , Li Junxiao 
Published: January 2021

Abstract
Sea surface temperature (SST) is one of the important dynamic parameters to characterize the physical characteristics of seawater, and it is also an important basic auxiliary parameter for the quantitative observation of other ocean parameters. In view of the lack of remote sensing data mainly caused by cloud cover over the ocean, based on the long-term MODIS Aqua L3 8-day mean SST products from January 2003 to March 2015, the missing data in the East China Sea are reconstructed by Data Interpolating Empirical Orthogonal Function (DINEOF) method, and the reconstruction results are evaluated by error analysis before and after cross-validation data reconstruction. It shows that the image reconstructed by DINEOF method can reflect the temporal and spatial variation characteristics of sea surface temperature in the study area, and the root mean square error of reconstruction is 0.4272. DINEOF method can reconstruct large area missing data without any prior information and has high accuracy.
Effect of Slope on Soil Carbon Storage in Prescribed Burning -- A case study of Pinus Kesiya in Jinggu County Yunnan Province
Authors: Gao Zhongliang , Wei Jianheng , Li Zhi , Long Tengteng , Wang Qiuhua , Zhou Ruliang , Shu Lifu 
Published: January 2021

Abstract
Compared control forest and prescribed burning forest of six slope of humus layer thickness, loads and organic carbon storage, and these soil levels organic carbon content and carbon storage in Pinus Kesiya, and confirmed to be suitable for carrying out prescribed burning. The experimental data showed that prescribed burning before and after, humus layer thickness of FS and GS are highly statistically significant (P<0.01), others were statistically significant (P<0.05). Loads and organic carbon storage of FS are highly statistically significant (P<0.01), GS, SS, AS and DS are statistically significant (P<0.05). Soil organic carbon content of FS, GS and DS on 0-60cm level are highly statistically significant (P<0.01), others slopes are statistically significant (P<0.05), FS and GS on 20-40cm are highly statistically significant (P<0.01), BS, AS and DS are statistically significant (P<0.05), lat slope and GS on 40-60cm are highly statistically significant (P<0.01), BS is statistically significant (P<0.05). Soil organic carbon storage of SS on 0-20cm is statistically significant (P<0.05), others are highly statistically significant (P<0.01), FS, GS and DS on 20-40cm are highly statistically significant (P<0.01), BS and AS are statistically significant (P<0.05), FS on 40-60cm is highly statistically significant (P<0.01), GS, BS and DS are statistically significant (P<0.05). Prescribed burning can decrease loads in forest, and carbon sequestration in different slope is different, preferred to FS to prescribed burning, next considering GS and BS, those can gain better efficiency, prescribed burning could not be carried out in SS, AS and DS.
Study on controlling factors of Heidimiao Reservoir formation in Block T121-4 of Aonan Oilfield
Authors: Wang Yihan 
Published: January 2021

AbstractThere are three types of faults in Block T121-4 of Aonan Oilfield, among which the faults developed from the early Qingshankou and terminated in the Third member of Nenen are the main channels for oil-gas migration. The pre-stack inversion shows that the lame impedance slice can well reflect the reservoir morphological characteristics and the channel characteristics are obvious. During the deposition period from HIIto HI, the water body changed from deep to shallow, the sedimentary facies transitioned from lakes to deltas, and underwater shunt channels were favorable reservoirs. The formation testing results show that the distribution of oil-gas is closely related to faults and sand bodies, and is the main controlling factor of reservoir formation. The main methods of oil-gas migration are vertical migration and short- distance lateral migration. If the fault-sand coupling relationship is good, oil-gas accumulation can be obtained. The reservoir anatomy shows that there are mainly two types of reservoirs in Heidimiao reservoir in the study area, namely structural reservoir and structural lithologic reservoir.
Research method and application of sedimentary facies in oilfield development
Authors: Ma Lihui , Chen Youming , Wu Hao , Nurula Jiarela , Dong Xiangrui , Ma Linjun , Liu Canchao , Gao Wenxi 
Published: January 2021

Abstract
The study of reservoir sedimentary facies can better describe the reservoir and ensure the smooth implementation of production. An in-depth understanding of the specific achievements of the sedimentary facies studies in the past few years can help us more accurately grasp the development process of geology and basins, so as to effectively improve the formation efficiency of oil and gas fields and thus achieve the improvement of economic benefits. In the process of determining the non-tectonical reservoirs, the study of sedimentary facies and sedimentary environment can be realized, but the study of these two aspects is still lacking and the effect is not very good. The study of sedimentary facies has a direct impact on the development of oil and gas in Our country, this paper mainly from the main characteristics of oil and gas development, in-depth introduction of the current oil reservoir development in a specific practical situation, in-depth introduction of the sedimentary relative to the specific advantages of oil and gas development.
Design and Construction of Double-wall Steel Cofferdam in Deep Water Foundations
Authors: Zhang Xuesong , Li Wenying , Zeng Baoshan 
Published: January 2021

Abstract
Deep water foundation is constructed by cofferdam in bridge engineering. Safety, quality, cost, and duration of bridge construction depend on the reasonable and feasible deep water cap cofferdam design and construction scheme. “Pile first, cofferdam back” construction program of double-wall steel cofferdam for deep water cap is applied in second SongHua river bridge. The results show that structural stiffness of steel cofferdam, strength of each component both meet work requirements under the most unfavorable conditions in the life-span of the construction process. This scheme effectively solves the technical difficulties in cofferdam construction and improve the working environment of installation and subsidence process. The project is going on well and the duration of construction time is reduced. This technique serve as a helpful reference to similar engineering.
Reservoir simulation of air injection assisted in situ upgrading process via subsurface electrical heating based on the horizontal well
Authors: Pei Shufeng , Wang Qiaobo , Zhang Panfeng , Huang Lijuan , Zhang Liang , Ren Shaoran 
Published: January 2021

Abstract
Heat transfer rate is slow during the in-situ upgrading process (ISU) via underground electrical heating, which is suitable for developing super heavy oil and oil shale reservoir. Considering the advantages of air injection process and horizontal well technology, an air injection assisted in situ upgrading process (AAISU) based on the horizontal well have been proposed and simulated. Reservoir simulation results show that air injection can improve heat transfer rate, enhance oil recovery by 11.4% and improve the energy efficiency from 4.54 GJ/GJ to 8.15 GJ/GJ comparing to the ISU process without air injection. Heating temperature and air injection rate are important for the AAISU process. When the heating temperature increase, the heat transfer rate and oil recovery increase, however, the energy efficiency are reduced stead. As for the effect of air injection rate, when the air injection rate increase from 500-4000 m3/day, the oil recovery and energy efficiency are rise first and then dropped, and the oil recovery and energy efficiency are the greatest when the air injection rate is 1000 m3/day.
Experimental Study on Aging Performance of Polyethylene Gas Pipelines
Authors: Wang Yixi , Lin Dong , Xiang Mingli , Cui Mingwei , Liu Na 
Published: January 2021

Abstract
Currently, there is a lack of adequate standards for evaluating the integrity inspection cycle of polyethylene (PE) gas pipelines. In this study, a series of photo-oxidation accelerated-aging experimental tests for PE80 gas pipe samples were performed. The attenuation laws of several critical performance parameters, such as micro-morphology, tensile strength, and thermal stability tests, were established. These parameters were determined at different aging times. A novel comprehensive performance evaluation method for pipeline integrity was developed using the analytic hierarchy process, and a reasonable inspection period for pipeline integrity was identified. The results showed that the samples experienced two stages of aging: rapid aging stage and aging platform stage. During the rapid aging stage, the comprehensive evaluation index for the aging performance decreased rapidly. However, the comprehensive evaluation index for the aging performance remained almost unchanged during the aging platform stage.
Organic geochemical characteristics of diatomite in Nadanhada terrane
Authors: Li Xiunan , Zhang Zilu , He Weizhong , Wang Longyu , Cai Dongrui , Yang Jiawen , Liu Lianxue 
Published: January 2021

Abstract
Based on the geochemical characteristics of the siliceous rocks in the Nadanhada terrane, the abundance, type and maturity of organic matter are studied, and the source rocks in Fuyuan, Raohe and Hongqiling are comprehensively evaluated. The type of organic matter in this area is mainly type III kerogen, which is in the high over mature stage with low metamorphic degree. At present, liquid hydrocarbon can still be produced. The Qianjin depression (Fuyuan area) of Sanjiang basin is a favorable area for the exploration of Lower Jurassic cherts with high organic matter abundance, low maturity and good preservation conditions.
Modeling and Analysis of the Pressure Shock Characteristics of a Load-sensitive Hydraulic System Jointly Controlled by Pump and Valve
Authors: Liu Yiou , Lai Qiwei , Zhang Runlin , Wang Nei 
Published: January 2021

Abstract
By establishing the mathematical model of a Load-sensitive Hydraulic System Jointly Controlled by Pump and Valve, the systematic simulation model based on AMESim is built. The simulation results show that the a Load-sensitive Hydraulic System Jointly Controlled by Pump and Valve has different pressure shock characteristics under different load conditions, which has certain reference value for understanding, using and designing the load sensitive pump composite control system.
The Application of base isolation in a power plant structure
Authors: Fu Yanwei 
Published: January 2021

Abstract
In this paper, large general finite element software ABAQUS is used to contrast the isolation before and after the seismic performance of a large coal-fired power plants, the application of isolation technology in the main factory building structure has carried on the preliminary discussion. Through to the main factory building structure system of isolation design and comparison analysis, get the following conclusion: after using isolation technology, obviously improve the seismic performance of the structure, under the effect of earthquake resistance, the structure of the floor shear, layer displacement and acceleration were significantly decreased, and the upper structure under earthquake is basic to keep translation, isolation effect is obvious.
Research on Inter-provincial Power Generation Rights: a Case Study of a Province in Eastern China
Authors: Fang Cheng , Pan Ting , He Xinying , Hu Jiahua , Zhao Wen , Zhao Erdong , Zeng Ming 
Published: January 2021

Abstract
Trans provincial generation rights trading is an effective means to increase the consumption of renewable energy. In this paper, taking a province in East China as the research object, considering the constraints of environmental protection, generator output, transmission line maximum load and other constraints, the inter provincial generation right model is constructed. Finally, through the model, the influence of transmission channel selection and bundling ratio on generation right potential space is analyzed.
Application Study on Zero Output Technology of Low Pressure Cylinder of 350MW Supercritical Unit
Authors: Zheng Wei , Zhu Lingkai , Che Yongqiang , Guo Junshan , Lao JinXu , Li Li , Ding Junqi 
Published: January 2021

Abstract
In response to the requirement of national thermal power flexibility reform policy and the need of regional central heating development, a 350MW supercritical unit in a power plant has been transformed with zero output technology of low pressure cylinder. In this paper, the scope and content of low pressure cylinder zero output transformation are discussed, peak shaving and heating capacity after transformation are analyzed, the difference between operation effect and calculation result after unit transformation is compared by test, and the matters needing attention in future operation are given, which provides reference for technical transformation of low pressure cylinder zero output of other power plant units.
Design and Implementation of 10kV Distribution Network Distribution Dispatching System Based on Eclipse Development Platform
Authors: Li Xin 
Published: January 2021

Abstract
In order to meet people's requirements for power quality and distribution network reliability, a distribution dispatching system for urban distribution network based on Eclipse as the development platform, Oracle as the database and eOMP as the software support is developed. After the demand analysis of the distribution network, the functional structure of the system is determined, and the overall design and detailed design of the system are carried out. The rule base is constructed according to the operation rules of distribution lines, and the knowledge base of operation order expert system is represented and inferred by BP (Back Propagation) neural network model. The results show that the system runs reliably and smoothly. Through this system, the power grid company can compile and implement the normal operation mode of distribution network, draw a primary wiring diagram of the line, make maintenance plan, and carry out scheduling and operation management of relay protection and automation devices in distribution network. Thus, the system helps to improve the power supply capacity and reliability of distribution network and reduce its operation cost.
Simulation of Stirling driven desalination power system
Authors: Chen Rui 
Published: January 2021

Abstract
This paper presents a new power system for reverse osmosis desalination, which is composed of a Stirling engine driven booster pump and a reciprocating piston pump rigidly connected. Firstly, the physical model is established by SolidWorks, and then the frequency of reciprocating motion of piston is calculated through the principle of piston component motion. Then, the UDF file of piston motion is compiled. Then, CFD analysis is carried out by FLUENT software to select the standard the temperature field, velocity field and pressure field in the pump chamber of Stirling engine are simulated by coupled method, and the output work of the engine is studied. The results show that the gas movement in Stirling engine is stable, the pressure at the discharge port of reciprocating pump is greater than the required osmotic pressure, and the whole power system can operate normally.
Research on 2D Temperature Field Measurement Method of Mg/CO2 Combustion Flame Based on Color CCD
Authors: Hu Kun , Xu Yihua , Li Minjie , Gu Xiang 
Published: January 2021

Abstract
A new Mg/CO2 powder rocket propulsion system is proposed for Mars exploration. Accurate measurement of Mg/CO2 combustion flame temperature field has important reference value for understanding the combustion characteristics and operating conditions. In this paper, the two dimensional temperature field of the Mg/CO2 combustion flame is obtained by building a Mg/CO2 combustion device and colorimetric temperature measurement system based on the color charge coupled device (CCD). The influence of magnesium powder particle size, premixed Reynolds number, and CO2/Mg oxygen fuel ratio on the flame temperature of Mg/CO2 combustion are discussed. The results show that the maximum temperature of Mg/CO2 combustion flame under different working conditions is between 2500K and 2900K, and it increases with the increase of magnesium powder particle size, premixed Reynolds number, and oxygen-fuel ratio.
Hair Oppression and Appropriation
Authors: Chaves Andrea Mejía , Bacharach Sondra 
Published: January 2021

Abstract
In countries like the United States, White people benefit from appropriating Black hair culture, even while Black men and women experience race-based hair discrimination and oppression. One goal of this paper is to raise awareness of hair discrimination and oppression within the philosophical community. Another is to consider whether current theories of appropriation can account for the wrongness of this widespread phenomenon and, if so, how. We are particularly interested in the special case where one minority group appropriates from another minority group—viz. the appropriation of Black hairstyles by Non-Black Persons of Colour (NBPoC). Our paper highlights the complexity of appropriation claims between competing minority groups—both of which have been oppressed, albeit differently, by White people— due to their multi-ethnic, multicultural and, therefore, intersectional, status.
Invited Commentary: The Uneven Gender Revolution and the Gender Gap in Depression in the United States
Authors: Shafer Emily Fitzgibbons 
Published: January 2021

Abstract
Women suffer depression at higher rates than men. In a meta-analysis using data from 1982–2017, Platt et al. (Am J Epidemiol. 2021;000(00):000–000) examine trends by age group in the gender depression gap and find no change in the depression gap among adults despite large changes in women’s opportunities during the same time period. They do, however, find an increase over time in the gender gap in depression among adolescents. I concur with Platt et al. that likely explanations for their findings involve the social environment. For adult women, the burden of being responsible for the majority of the household labor and the rise in unmarried parenting are likely explanations for why increased paid work opportunities have not resulted in a decrease in the gender gap in depression. For adolescents, the increase might be due to the popularity of social media rising at the same time expectations surrounding beauty and attractiveness heightened for girls and young women. Platt et al. highlight the relationship between the uneven change of the “gender revolution” and depression.
Molecular and phenotypic variation of the white locus region in Drosophila melanogaster.
Authors: Miyashita N , Langley C H 
Published: January 2021

Abstract
Restriction site and insertion/deletion polymorphism in a 45-kb region of the white locus on the X chromosome in Drosophila melanogaster was investigated for 64 X chromosome lines with six 6-cutter and ten 4-cutter restriction enzymes. A total of 109 polymorphisms were detected (54 restriction sites and 55 insertions/deletions). Estimated heterozygosity per nucleotide for this region (0.004-0.008) was similar to those of the Adh and 87A heat-shock locus regions located on the autosomes in D. melanogaster. This is contrary to a simple prediction based on the theory of mutation selection-balance of partially recessive deleterious mutants which predicts less variation on X chromosomes. Large linkage disequilibria between pairs of polymorphisms (including insertions and deletions) within the transcriptional unit (especially the 3' end of the 1st intron) were observed. As expected from population genetics theory, linkage disequilibria between these polymorphisms were greater for those pairs that are physically closer on the restriction map. Linkage equilibrium was typically observed when the pairs of sites were separated by 2 kb or more. Although significant between-line variation in eye pigment was observed (P less than 0.05), there is little evidence for strong associations between this phenotype and the polymorphisms at the DNA level.
Evidence for frameshift mutations in the hisH gene of Escherichia coli causing synthesis of a partially active glutamine amidotransferase.
Authors: Pons F W , Neubert U , Müller P 
Published: January 2021

Abstract
Among eight strains carrying acridine-induced mutations in hisH, five which mapped at four different sites in the promoter-distal region of the gene showed His+ phenotypes on media containing a purine. By complementation analysis, hisH enzyme was shown to be required for growth on purines. Purine-sensitive His+ revertants of strains able to grow on purines carried second-site mutations which in one case could be shown to map in hisG. Strains able to grow on purines were able to grow on 2-thiazolyl-DL-alanine, too. We conclude that frameshift mutations in the promoter-distal part of the hisH gene of E. coli do not completely abolish the activity of the gene product.
Transformation of yeast by agitation with glass beads.
Authors: Costanzo M C , Fox T D 
Published: January 2021

Abstract
We have found that agitation of Saccharomyces cerevisiae with glass beads and plasmid DNA using a vortex mixer results in genetic transformation of the yeast cells. This method is less efficient, but considerably more convenient, than other yeast transformation procedures. The fact that the minimal requirements for transformation are simply physical damage and the presence of DNA in an osmotically supportive environment suggests that this process may occur in nature.