bluuebunny/crossref_metadata_2025_split huggingface dataset:
Short-term tidal current prediction based on GA-BP neural network
Authors: Qiao Xiangshuo , Guo Fengyi , Zhang Runfeng 
Published: July 2020

Abstract
Tidal current is a novel type of renewable energy for power supply. Accurate and stable tidal current prediction is an important research area in the field of tidal current energy development. In this paper, the GA-BP Neural Network is studied deeply, and the historical time series data and time factor are adopted to improve the input. Besides, the prediction model of tidal current components is established based on the experiment data. To validate the effectiveness of the presented method, other five popular prediction models are also introduced and compared. The simulation results show that the model established in this paper is superior to other five models and has better prediction ability in terms of two commonly used performance indices.
Application of Bowers Model in Abnormal Pore Pressure Prediction in Deepwater Drilling
Authors: Tan Qiang , Hao Xining , Luo Chao , Zhang Jiachen , Weng Haoyang 
Published: July 2020

Abstract
Accurate prediction of formation pore pressure is of great significance to ensure drilling safety. Most of the traditional pore pressure analysis methods are based on the theory of unbalanced compaction of mudstone, and theoretically, only the abnormally high pressure formed during “loading” process can be predicted. The Bowers model is based on the effective stress principle, and can be used for most pore pressure prediction in different lithology and pressure mechanism. The Bowers model was used to analyse the abnormal formation pressure in deep-water area of the Q Basin, South China Sea. According to logging data and pressure test data of drilled wells, it was judged that the cause of abnormal pore pressure in the above area is both “loading” and “unloading” mechanism and the empirical coefficients of the Bowers model in this region were calculated. Using seismic interval velocity data, the pore pressure of an exploration well was predicted before drilling and the prediction error is less than 5% compared with the measured values after drilling. It is shown that the Bowers model has high accuracy for quantitative prediction of abnormal pore pressure in deep-water area of the Q basin.
Experimental Study on the Liquefaction Mechanism of Iron Ore Fines Cargoes
Authors: Li Xiaohang , Zhang Jianwei 
Published: July 2020

Abstract
The liquefaction of Iron Ore Fines (IOF) during maritime transportation has got more attention in recent years. To study its liquefaction mechanism, the undrained monotonic loading tests on saturated IOF were conducted by using compression tri-axial apparatus. The static liquefaction behaviors of IOF under different densities and confining pressures were investigated. And different phenomenon has been observed on the IOF specimen. For the loose IOF specimen, slight dilate was observed and the phase transformation occurs in its stress-path curve under a high confining pressure. There is no phase transition in the intermediate density IOF sample, which shows more complex behavior. For the dense IOF specimen, a contractive behavior appears firstly then a long dilate starts. In view of these abnormal behaviors, the flow pattern failure mechanism of IOF is discussed, which provides a basis for the safe transportation of this kind of goods.
Heavy metal concentrations and ecological risk assessment for surface sediment of Da Qaidam Salt Lake in Qaidam Basin, northern Tibetan Plateau
Authors: Gao Chunliang , Yu Junqing , Min Xiuyun , Cheng Aiying 
Published: July 2020

Abstract
The paper focused on heavy metal (Cr, Cu, Pb, Zn, As, Co, Ni and Mn) concentrations from surface sediment in the southeastern Da Qaidam Salt Lake. Based on the pressed powder pellet method and X-ray fluorescence spectrometry analysis, as well as the enrichment factor, geoaccumulation index and potential ecological risk index, the possible sources and pollution level of heavy metals were studied. The results showed that spatial distributions of heavy metal concentration were indicative of nonuniform characteristics in different zones of Da Qaidam Salt Lake, the average enrichment level of heavy metals followed the decreasing order: EF(As) > EF(Mn) > EF(Cu) > EF(Zn) > EF(Pb) > EF(Cr) > EF(Ni) > EF(Co), and arsenic was the main heavy metal contaminant. In a word, the level of heavy metal pollution in the southeastern Da Qaidam Salt Lake was not strong, but anthropogenic emissions would become the main source of heavy metals along with the frequent and strong human activities in the surrounding region.
Research on prediction method of fractured reservoir
Authors: Liu Jianqiang 
Published: July 2020

Abstract
In oil and gas exploration engineering, it is very difficult to identify and evaluate fractured reservoirs. Not only do we need to have scientific and reasonable methods, but we must also grasp relevant data and information through field investigations. Only in this way can we comprehensively predict cracks. In this paper, the characteristics of fractured reservoirs in China are briefly discussed, and some effective methods for predicting fractured reservoirs are given in combination with scientific evaluation methods for the reference of the frontline personnel.
The Numerical Calculation and Laboratory Model Validation Analysis of Mechanical Noise Based on Benchmark Submarine Model
Authors: Lv Shuai , Yang Xuemeng , Cao Feng 
Published: July 2020

Abstract
The mechanical noise analysis of ship structure based on finite element method has been an important means of mechanical noise assessment in the initial design stage of ships. This article is based on the Benchmark standard submarine model, carrying out the numerical simulation of the Benchmark submarine scale model, and obtaining the first-order and second-order natural vibration characteristics of the model. At the same time, we establish a laboratory test system of the Benchmark submarine scale model, and test the natural vibration characteristics of the model under laboratory conditions. We compare numerical simulations and experimental laboratory test results, optimize the numerical modeling method and find the reliability of the numerical simulation calculation. Based on the above research, modeling a true-scale Benchmark standard submarine model, calculate the natural vibration characteristics of the Benchmark submarine model in the ocean flow field environment. Then calculate the value of mechanical radiation noise under the excitation of mechanical equipment based on the natural vibration characteristics results.
Research on urban ecological competitiveness under the integration of Yangtze river delta
Authors: Shuai Li 
Published: July 2020

Abstract
Based on the analysis of the connotation and related theories of urban ecological competitiveness, this paper constructs the Yangtze River Delta integrated city from the three aspects of ecological background, ecological environment pressure and social coordination ability, drawing on the evaluation system and models at home and abroad. Then, based on the index system, this paper takes the data of some cities in the Yangtze River Delta as the research sample, through the methods of principal component analysis and mean value method to carry out empirical research on the urban ecological competitiveness under the integration of the Yangtze River Delta. Finally, from the three aspects of planning, policy and implementation guarantee, the paper puts forward the measures to improve urban ecological competitiveness under the integration of the Yangtze River Delta.
Analysis on the Effect of Habitat Fragmentation And Exploration of Its Solutions
Authors: Wang Kexin 
Published: July 2020

Abstract
Habitat fragmentation threatens biodiversity and species distribution. The overall objection of this study is exploring the reasons and phenomena of fragmentation and discussing the impact of habitat fragmentation on animal diversity, plant diversity, insect diversity, arthropod diversity and the distribution of species. In order to show the same impact of habitat fragmentation on animals, plants and microorganisms. The study research the similarity and difference of effects of habitat fragmentation to three different organisms. The method used in our study is analyzing the relationship between fragmentation and diversity by using landscape elements. The studies we have reviewed showed that habitat fragmentation has adverse effect on most species, influences interspecies communications. And the fragmentation can be imputed to human activities.
Combination of Wastewater Treatment Measures and Landscape Ecological Design in Traditional Villages Based on Sustainability Theory: A Case Study of Miao Village in Xiangxi, China
Authors: Tang Yuanqiang , Tang Yuanxing , Zhang Mengmiao , Zhao Jianmin , Liu Yunguo , Long Shaoqiu , Xiao Can , Chen Yu , He Shaoyao , Yang Chunping 
Published: July 2020

Abstract
The aim of protecting traditional villages is to maintain the population; thus, these villages must be suitable for living. A prerequisite for the liveability of traditional villages is treatment of point and non-point sources of pollution to improve the ecological value of the village. The combination of water pollution control measures and landscape design improves the aesthetic and ecological sustainability. This article takes China’s fourth batch of traditional villages, Xiangxi Wengcao Miao Village, as an example. Interviews, field surveys and various discussions were conducted, and the study believes that by connecting the various sewage outlets, they are collected in the first, second and third levels. Treatment ponds (tanks) transformed curved rice fields into secondary treatment tanks and stabilised ponds. Native plants were classified before stable and treatment ponds were excavated. Submerged, floating and emergent plants were artificially planted in the water, and medicinal plants were cultivated around the pond and banks of the creek. These biomass plants are relatively large for the nutrition in the wastewater. Adsorption and digestion of the substance can not only reduce the direct discharge of sewage to downstream regions but also beautify the landscape of the sewage treatment facility.
Effects of Physical and Chemical Factors on Zooplankton in Tropical Shallow Urban Lakes
Authors: Chen Guangrong 
Published: July 2020

Abstract
zooplankton played an important role in freshwater ecosystem. Its distribution was influenced not only by biological factors such as fish and aquatic plants, but also by physical and chemical factors such as water temperature, chlorophyll and pH. By analyzing the relationship between zooplankton and physical and chemical factors in urban lakes of Lingnan, the results showed that water temperature was one of the important factors affecting the distribution of zooplankton which had half of the species and dominant species being tropical or subtropical. The abundance of zooplankton was positively correlated with the chlorophyll content in the water, positively correlated with the suspended matter content, and negatively correlated with the transparency and pH. The study was helpful in providing support for the ecological restoration of tropical shallow water urban lakes.
Life Cycle Assessment of Upgrade Options of a Municipal Sewage Treatment Plant for Energy Self-sufficient
Authors: Sun Xuefei , Jin Mingji , Li Na , Piao Wenhua 
Published: July 2020

Abstract
The environmental impact of four municipal sewage treatment scenarios were investigated by life cycle assessment (LCA). The environmental impacts were assessed with four categories: acidification potential (AP), eutrophication potential (EP), global warming potential (GWP), and human toxicity potential (HTP). Compared to the current operation scheme (Scenario 1), EP was significantly reduced but AP, GWP and HTP was increased in A2O-MBRprocess (Scenario 2). Compared to the Scenario 2, Scenario 3 (water source heat pump) and Scenario 4 (sludge anaerobic digestion) processes for the energy self-sufficient alternatives achieved the greatest environmental improvement in all impact categories. These results suggested that the proposed energy self-sufficient scenarios may greatly reduce the environmental impact of energy consumption in the whole sewage treatment process.
Study on Noise Pollution of 220kV Substations in Liaoning Province
Authors: Wu Songyu , Li Xiang , Qi Xiaoyan , Li Chengjun , Xu Tianyuan 
Published: July 2020

Abstract
Environmental noise has become a common concern of the society, and there are more and more disputes over environmental noise. In this paper, the emission noise of 61 typical 220kV substations in Liaoning Province is tested and analyzed. A total of 610 measuring points are detected, and the level of the noise pollution is clarified. At the same time, the analysis and research on the spectral characteristics and attenuation rules of substations with sensitive points and environmental impacts are emphasized on the basis of actual measurement. The results show that the main noise pollution zone in the substations is in the middle and low frequency areas, and the staff in the substations need to do the key protection. Meanwhile, the vegetation area has a positive effect on the attenuation of the noise.
Study on Risk Assessment of Typhoon Storm Surge Based on Public Safety Triangle Theory
Authors: Wu Le , Li Jian , Ruan Yangzhi , Sun Lie , Huang Quanyi , Yang Xiuzhong 
Published: July 2020

Abstract
Based on the “triangle theory” of public safety and combined with the formation mechanism and characteristics of storm surge disasters, this research comprehensively considered the danger of disaster events, disaster carriers in the affected area, and disaster prevention and mitigation capabilities such as emergency management and considered the possibility of secondary/derived disasters arising from disaster factors and whether they are in sensitive time periods with a view to studying the risk evaluation technology of storm surge disasters. According to this study, a risk assessment method is established to assess the risk of real-time dynamic events before emergency decision-making.
Design of and Research of Vertical Deformation Measuring Instrument based on Synthetic Material
Authors: Huang Jinfei , Luo Ligang , Zhang Fan , Zhang Hangbin , Zhao Xinze 
Published: July 2020

Abstract
With the publication and implementation of the national standard GB 36246 “Sports Ground for Synthetic Materials in Primary and Secondary Schools”, relevant testing activities have come in droves. However, the smooth development of testing requires not only standards, but also corresponding testing equipment. Therefore, in accordance with the requirements of the national standard GB 36246 for vertical deformation measurement indicators, this paper carried out the design and research work of related testing equipment, and successfully developed a synthetic material-based surface Layer vertical deformation measuring instrument, which connects the electromechanical control system composed of electromagnetic control system, main structure, etc. and the data storage and analysis system, realizes the systemization and automatic control of the synthetic material surface vertical deformation measuring device, and meets the national standard GB 36246 and European standard EN14809 “Measurement method of vertical deformation of ground layer of sports field”.
Performance of Chromic Acetate-HPAM Gel for Flue Gas Mobility Control in Low-Permeability Reservoir
Authors: Qiao Wenli , Zhang Guicai , Ge Jijiang , Li Jianda , Jiang Ping , Pei Haihua 
Published: July 2020

Abstract
Chromium acetate-HPAM gel is developed to solve the gas channeling problem in low-permeability flue gas flooding reservoirs. Polyacrylamide with low molecular weight of 2 million is optimized as the main agent to construct an organic chromium gel system. The acid resistance performance and blocking capacity of the gel system are evaluated afterwards. It is revealed by the tests that acid components in flue gas have a severe impact on the gelation time, strength as well as long-term stability of the cross-linked gels. Rheological tests show that the gel system embodies with high elastic modulus in flue gas environment at 42°C, which ensures its favorable performance in core flooding tests. After gel application in cores, the permeability reduction can reach up to 99% and 97% separately while water flooding and flue gas flooding. The chromium acetate-HPAM gel exhibits perfect mobility control ability and possesses immense potential as regulating blocking system in low-permeability flue gas flooding reservoirs.
The power system in ERP environment about analyze and deal the problem of the project planning
Authors: Gao xiaoyu , Qiu tuo , Gu ying 
Published: July 2020

Abstract
ERP is important resource management software of enterprise resource planning, related to the electrical power system can purchase materials smoothly, whether the project is going step-by-step, and weather the financial department can settle accounts as planned, solve the problems of ERP has great significance to the power supply system. at the same time can effectively improve the work efficiency of the project.
Research on China’s Renewable Energy Quota System Allocation Efficiency Based on DEA Model
Authors: Zhu Keding , Li Ruan , Fan Shuwen 
Published: July 2020

Abstract
With the deepening of China’s energy transformation process, the promotion of renewable energy quota system has gradually received the attention of the government and scholars. National energy house has issued corresponding supporting policies for renewable energy quota system transactions for many times. Renewable energy quota is very important for the evaluation of economic benefits and energy conservation and emission reduction benefits. Based on Data Envelopment analysis, this paper establishes a model for evaluating the effectiveness of renewable energy quota system. The model takes the quota constraints of each province as input variables, the total installed capacity of each province and the CO2emission of each province as input variables, and takes the total GDP of each province as output variable, calculates the technical efficiency values of each province under the conditions of taking into account and excluding the quota constraints respectively. Comparing the difference of technical efficiency between the two times, the optimal input-output benefit interval of the system is judged, and the inefficient DMU is pointed out, which direction and degree of improvement are put forward.
Discussion on some problems of risk identification of coal seam outburst
Authors: Fan Xiaogang 
Published: July 2020

Abstract
The identification of coal and gas outburst is a complex work. In order to strengthen and standardize the identification of coal outburst risk, the state has issued a series of regulations and requirements. Combined with various problems encountered in outburst identification work, this paper studies and discusses the selection of identification indexes, the situation that adjacent mines are identified as outburst, the situation that they do not have identification conditions, the relationship between measurement points and identification scope, and the location of geological structure areas, etc., and puts forward suggestions for relevant regulations, which will be helpful for future outburst coal seam identification work and revision of national regulations.
Research on high pressure hydraulic slotting technology for pressure relief and permeability increase of coal seam
Authors: Li Chengcheng 
Published: July 2020

Abstract
High pressure hydraulic slotting technology is one of the technical means of pressure relief and permeability increase in high gas and low permeability coal seam area. Different coal seam conditions, the selected slotting process parameters are different. In order to obtain the reasonable parameters of high-pressure hydraulic cutting in soft coal seam, the field tests of different cutting pressure, different cutting time, different rotation speed and different cutting spacing were carried out in No.2 coal seam of Xue-hu Coal Mine. The test results show that the optimal cutting pressure is 60MPa ∼ 70MPa, the cutting speed is 80R / min, the cutting interval is 2m / knife, and the coal output of single knife is controlled at about 1.6T. Tests were carried out for different spacing of boreholes, the results show that the average extraction concentration of slotted hole is 1.75 times that of common hole, and the average extraction purity is 3.25 times that of common hole.
Research on and Application of On-line Cleaning of Stainless Steel Tube Condense
Authors: Wang Fei , He Fengyuan , Li Yao 
Published: July 2020

Abstract
Based on the analysis of the scaling of the stainless steel condenser in a power plant, through a large number of tests, the proper cleaning formula is selected to clean the scale in the condenser on line. After cleaning, the effect is obvious. After cleaning, the end difference of the condenser decreases from 10 °C to 5 °C, which saves a lot of fuel.
Effect of Grading Type on the Performance of Warm-Mix Rubber-Asphalt Mixture
Authors: Zhang Qiang 
Published: July 2020

Abstract
This paper designs three warm-mix rubber-asphalt mixtures with different grading types based on the Course Aggregate Void Filling method (CAVF) and standard method, and studies the rules of influence of the warm mixing effect and grading type of the warm-mix rubber-asphalt on the pavement performance of the mixtures through compaction temperature analysis, Marshall test, and rutting test. The results show that the compaction temperature of warm-mix rubber-asphalt mixture can be reduced by about 20 °C, and it has a significant warm mixing effect and excellent pavement performance.
Study on Identification of SSI Damping System Based on Large-Scale Shaking Table Test
Authors: Han Zhiyu , Zhang Zhiying , Wei Hongyang , Ze Qiji 
Published: July 2020

Abstract
Damping system represents the energy dissipation characteristics of the overall structural system. The correct identification of damping system is not only the premise of selecting dynamical analysis method, but also the foundation of obtaining accurate results in seismic analysis. Traditionally, the identification of damping system under dynamic action is based on material properties. However, this method is lack of theoretical and experimental research. Based on fundamental identification method, the paper presents the study on the consistency of dynamic characteristics between different parts by shaking table test. The changing law of SSI damping system in different dynamic processes is investigated. The experimental results indicate that SSI system manifest obviously classical energy dissipation characteristics under certain conditions and can be considered as an approximate classical damping system.
Analysis on Water Wall Tube Explosion in a Power Plant
Authors: Li Yao , Liu Chengming , He Fengyuan , Wang Fei 
Published: July 2020

Abstract
Combined with the influencing factors of water wall tube explosion, this paper analyzes the water wall tube explosion of a power plant, and finds out that the water wall tube explosion may be caused by hydrogen embrittlement or local overheating, and expounds the measures to reduce the water wall tube explosion and reduce the risk of water wall tube explosion.