bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on Virtual Power Plant’s Participation in Power Market under the Background of Energy Internet in China
Authors: Su Yang , Kening Chen , Yang Wang , Yu Jiang , Yu Ding , Xuwen Liu , Qiuyang Ma 
Published: January 2021

Abstract
Under the background of energy internet, a large influx of market entities participates in the interaction of “source network and load storage” and becomes an important resource for system regulation through the electricity marketization. Among them, the virtual power plant involves several market participators such as the distributed generation, demand side adjustable resources, distributed energy storage. The research of the operation mechanism and market-oriented trading organization for the virtual power plant becomes a popular topic in recent years. This paper proposes a novel mechanism for virtual power plants to participate in the electricity trading market, including the trading categories and auxiliary service which can be provided by the virtual power plant.
Dispersion curves for Acoustic Multipole Sources on guided waves in Isotropic Tubular Structure Liquid Metal Sodium Filled
Authors: Zhang Li , Duan Jingwen , Sun Guohang , Wang Peimao 
Published: January 2021

Abstract
A new analytical method is proposed for the multi-pole sound source of the isotropic tubular structure liquid metal sodium with the symmetry principal axis parallel to the tube axis. For the first time in this paper, a new method is used to simulate the dispersion characteristics of an isotropic tubular structure filled with liquid sodium. By selecting a set of displacement potentials and a cylindrical coordinate system along the tube axis, the multipole sound field solution of the isotropic tubular structure filled with liquid sodium is derived. The sound field of the multi-pole source inside and outside the tube is studied, and the dispersion characteristics in the tube are numerically simulated. The results show that in the isotropic tubular structure in which the symmetrical main axis of the tube excited by the monopole, dipole and quadrupole sources is parallel to the tube axis, the dispersion characteristics of the filled liquid metal sodium vary with the thickness and temperature of the tube and change.
Fracture failure analysis of conductive arm spring of isolation switch in 500kV substation
Authors: Wang Jun , Liu Yungen , Chen Junjun , Huang Rong , Cao Xianhui , Feng Chao 
Published: January 2021

Abstract
Through macro inspection, chemical composition analysis, hardness inspection, graphite carbon inspection, metallographic inspection, the causes of spring fracture on conductive arm of isolation switch in a 500kV substation were analyzed. The results show that poor manufacturing technology and anti-corrosion technology of the spring are the main reason for its fracture. Corresponding control measures are put forward to avoid similar failures from happening again.
Research on Revenue Maximizing Dispatch Strategy for New Energy Micro-grid
Authors: Qin Liangdong , Qi Xiaoguang , Xu Tianfeng , Feng Renqing , Gao Chao 
Published: January 2021

Abstract
In this paper, a mathematical model for micro-grid energy management, including photovoltaic, wind power, micro gas turbine and energy storage devices, is established. On this basis, considering the impact of electricity price on user demand, this paper proposes a micro grid scheduling strategy based on revenue maximization.
Dynamic Analysis of 110 kv Double-circuit Compound High-strength Hollow Mezzanine Concrete-filled Steel Tube Pole
Authors: Xingeng Li , Dingzhou Guo , Bichuan Fu , Hongjun Liu 
Published: January 2021

Abstract
Combined with the simplified mechanical model of the pole-line system, the dynamic stability of 110kV hollow mezzanine concrete pole is analyzed and its dynamic equation is established. The main resonance mode in the plane is analyzed by the approximate analytical method, and the stability is determined and solved by the stability theory. The characteristics of wind-induced vibration are revealed from the perspective of nonlinear dynamics. Based on Hamilton principle, the partial differential equation of motion of the simplified dynamic analysis model of the tower column is established, and it is discretized into ordinary differential equation by Galerkin method. Finally, the critical frequency equation is established according to the method proposed by Bolotin, so as to obtain the dynamic stability region and instability region of the tower column. Based on the B-R motion criterion, the nonlinear dynamic stability of the pole-line system is studied, and the initial pretension, wind direction angle and span of the cable are selected for parameter analysis. The influence of these parameters on the nonlinear dynamic stability critical load of the hollow mezzanine concrete pole line system is investigated.
Modal analysis and influence law of a wind turbine main shaft
Authors: Wu Yu Xing , Yang Zhan Jun , Zheng Zhun Bei 
Published: January 2021

Abstract
A finite element model was established and modal analysis was performed on a wind turbine main shaft. By adjusting the length of the expansion sleeve, the effect of the length of the expansion sleeve on the natural frequency of the wind turbine shaft was summarized. The results show that the greater the length of the expansion sleeve, the greater the natural frequency of the wind turbine shaft.
A phase sequence error analysis and diagnosis of 110kV outline interval in a 220kV substation
Authors: Feng Chao , Chen Pei , Liu Jun , Zou Pinjing , Xie Yi , Long Yi 
Published: January 2021

Abstract
With the help of digital X-ray imaging technology, a phase sequence error of conducting rod of isolation switch was diagnosed. By studying the design drawing of GIS before field testing, the typical characteristics of conducting rod arrangement was mastered. It referred to us that the digital X-ray imaging technology should be widely promoted to improve detection efficiency.
Integrated Power System Planning of Multiple Resources with Natural Gas Network and Power Sources
Authors: He Ji-feng , Sang Zi-xia , Huang Jia-qi , Wang Si-cong , Yan Jiong , Fang Reng-cun 
Published: January 2021

Abstract
In order to promote all types of energy utilization, interaction between supply and demand as well as efficient operation, a new generation of energy systems which treats the electricity grid as the core came into being. Unlike traditional power system, the electricity network and gas network in the new generation of energy systems are closely linked through gas-fired units, and influence each other. Therefore, to ensure the safe operation of the future electricity network and natural gas network, the integrated framework for generation, electricity network and gas network expansion planning need to be carried out. Under the premise of meeting the electricity network and gas network safe operation constraints, we propose a multi-stage planning model for the combined generation, electricity network and gas network, in which investment cost and operating cost of the combined system are minimized. Combined generation, electricity network and gas network expansion planning is a large-scale, high-dimensional, non-convex and nonlinear optimization problem, which is difficult to solve. To solve this problem, we propose an incremental piecewise linear method to convert the original model into a large-scale mixed-integer linear optimization problem, allowing the use of sophisticated mathematical optimization method to quickly obtain the optimal solution.
Numerical simulation on velocity and temperature of a slotted swirl combustor
Authors: Li Haozhen , Lin Jiming , Zhang Yong 
Published: January 2021

Abstract
Cyclone combustion chamber has the advantages of compact structure, short flame length, good combustion stability, high combustion efficiency and low emissions of pollutants, etc. As one of the key components of the cyclone combustion chamber, the cyclone has a direct impact on the working performance of the combustion chamber. In this paper, we propose a slotted swirler and describe its structure in detail. We simulate the cold state flow field and the hot state temperature field in the combustion chamber of a cyclone with open seam using the CFD method, taking into account the effect of open seam on the air flow field and temperature distribution after the cyclone at different angles. The simulation shows that the temperature distribution in the slotted swirl combustor exhibited a center-focused flame of higher temperature, compared with the non-slotted swirler, the slotted swirler exhibits certain advantages in terms of drag reduction, combustion stability and combustion efficiency, which has a certain guiding effect on the improvement of the working performance of the combustion chamber.
Analysis of Solar and Wind Power on Access Planning of Multiple Renewable Energy Sources
Authors: Yan Jiong , Sang Zi-xia , Wang Si-cong , Du Zhi , Huang Jia-qi , Yang Dong-jun , Wang Ya-lei 
Published: January 2021

Abstract
The scenario generation method suitable for solar and wind power obeying any probability distribution and the concept of cluster was brought up to improve the consumption ability of distribution network of medium and high voltage for renewable energy. The planning model of renewable energy access was established based on cluster partition considering the investments and power generation interests of power producers as well as the power match degree within clusters. The Benders decomposition method was employed to solve the planning problem, and the complicated planning problem of renewable energy generation is decomposed into the decomposed investment operation model. Therefore, the access planning of renewable energy taking account of the solar and wind power was realized.
Sponge City Planning and Construction of Small Towns in Subtropical Mountainous Areas of Yunnan Province
Authors: Qiu Yan , Xu Haodong , Yang Yanqing , Zhao Yan , Wang Jing 
Published: January 2021

Abstract
Taking Ning’er County, a small town in a subtropical mountain area, as an example, explore a scientific and reasonable sponge city construction plan suitable for small towns. In analyzing the problems of water safety, water resources, water environment, and water ecology in the construction of Ning’er County sponge city, the sponge city construction goals were put forward according to local conditions, and the construction process of the entire process of “source reduction, regional control, and system governance”, Proposed a systematic planning and construction plan for Ning’er County sponge city construction.
Study on the relationship between erosion and deposition evolution of artificial beach and protection project
Authors: Ge Long Zai , Liu Hai Yuan , Chen Han Bao 
Published: January 2021

Abstract
Based on the national positioning of “Blue Bay” regulation, this paper combines the Yueliang Bay renovation project of Rizhao Port, and uses the theory of parabola type headland balanced shoreline to propose the scale relationship between artificial beach and protection scheme. Through the test and verification of large scale normal physical model, the beach stability scheme and maintenance period are given, which meet the design requirements. The results can provide technology for similar projects Operation guidance.
A research for the safety influence of dropping anchor on the submarine pipeline
Authors: Hu Ke , Zhang Ci-heng , Zhou Rui-zhe , Gao Feng 
Published: January 2021

Abstract
The oil submarine pipeline would transfer the gas from the oil well offshore to the land. Considering the wharf may be located nearby area and the pipeline would pass through under the ship channel. There would be danger to the pipeline when the dropping anchor at the emergency situation. In this research, the process of the anchor dropping is introduced. Firstly, the speed of the anchor was obtained by experimental method when the anchor falling to the seabed above the pipeline. Meanwhile, the maximum impact force of the dropping anchor at different protective layer situation was also tested. This research would be instructive to the design of pipeline protection.
Application of GWLF model in the Baohe River Watershed: Analysis of the source composition of nitrogen and phosphorus in the region
Authors: Qi Zuoda , Kang Gelin , Hu Chuanqi , Xu Yanan , Chen Hanbao 
Published: January 2021

Abstract
The Luan River is one of the main rivers entering the Bohai Sea, and the Baohe River is a major tributary of the Luan River. Determining the contribution of pollution sources in the watershed where the upstream river enters the sea is a prerequisite for formulating environmental management measures in the sea area. Facts have proved that the model is an effective tool to determine the main environmental targets, especially in the analysis of pollution sources in the watershed. This paper uses the General Watershed Load Function (GWLF) model to simulate the monthly streamflow, dissolved nitrogen (DisN) load and dissolved phosphorus (DisP) load in the Baohe River Watershed from 2006 to 2014, and the contribution ratio of each pollution source in the source allocation of nitrogen and phosphorus load is emphasized. The application of the model shows the effectiveness of planning nitrogen and phosphorus management strategies for decision-makers, and provides a certain decision-making reference for pollution control in the watershed into the sea.
A target tracking algorithm based on ship exhaust
Authors: Deng Mengtao , Peng Shitao , Hu Jianbo , Qi Zhaoyu 
Published: January 2021

Abstract
In the field of maritime law enforcement, it is a key technology to achieve stable tracking of the black smoke exhaust of ships. Based on correlation filter tracking algorithm, a novel ship black smoke exhaust tracking algorithm is proposed. The proposed algorithm can complete the real-time tracking of ship black smoke exhaust. In addition, it can be transplanted to mobile devices, which can quickly and efficiently complete the tracking and law enforcement of the ship’s black smoke, and provide convenient services for maritime law enforcement in the ship’s emission control area.
Distribution and speciation of phosphorus in surface sediments of the intertidal zone in the Yellow River Delta
Authors: Liang Baocui , Peng Shitao , Xu Wen , Xiong Hongxia , Zheng Tianli 
Published: January 2021

Abstract
For better understanding the phosphorus (P) cycle, it is essential to distinguish the contents of different P speciation in sediments. In the study, the content of total phosphorus (TP) in the sediments ranged from 88.80 to 227.56 μg·g-1, with an average of 138.42 μg·g-1. The content of inorganic phosphorus (IP) ranged from 84.21 to 224.26 μg·g-1, accounting for 88.74%-98.55% of the TP content, which was the main occurrence form in the intertidal sediments of the Yellow River Delta. the contents of phosphorus fractions in surface sediments were 37.06 to 106.35 μg·g-1 for detrital phosphorus (De-P), 2.99 to 34.39 μg·g-1 for exchangeable phosphorus (Ex-P), 5.27-106.06 μg·g-1 for iron bound phosphorus (Fe-P). On the whole, the existing forms of inorganic phosphorus could be ranked as follows: De-P > Fe-P > Ex-P > authigenic phosphorus (Au-P). The regression analysis between TOC content and various forms of phosphorus showed that TOC content was negatively correlated with De-P.
An analysis of the environmental pollution of A specialized coal terminal In Tianjin Port
Authors: Sun Lei , Qi Bin , Zhang Weiqian 
Published: January 2021

Abstract
In order to comprehensively evaluate thecurrent situation of air pollution control in bulk terminal, the measures and effects of atmospheric environmental management of a specialized coal terminal company in Tianjin Port are studied. Through field investigation, monitoring and data analysis, the current situation of atmospheric environment of the subjectswas quantitatively analyzed and compared with national standard. The results show that, under the premise of using spray, covering, Wind-proof net and other management measures during monitoring, the atmospheric environment and major characteristic pollutants at the boundary of the terminal operating area meet the standard requirements.
Analysis on Fees Matter in Asset Allocation Planning
Authors: Cui Peng , Wang Peimao , Liu Xia 
Published: January 2021

Abstract
The purpose of this paper is twofold: first, to discuss cost controls, including tax management, and second, to introduce methods for seeking professional help when needed. The more you pay in fees and commissions, the less you earn in return. Controlling costs is an important part of any investment strategy, and that includes a good tax strategy. Some people opt to hire a professional investment manager to help with this asset allocation process and to stay on track. The final part of the chapter discusses the advantages and disadvantages of hiring an investment adviser.
Canonical correspondence analysis of relationship between characteristics of phytoplankton community and environmental factors in Wolong Lake
Authors: Ma Shanshan , Lv Xingchen , Geng Shicong , Wang Guofeng , Yang Shuo , Gao Yu 
Published: January 2021

Abstract
For the purpose of exploring the evolution process of aquatic ecosystem in Wolong Lake, the phytoplankton community structure and water quality were surveyed at 20 sampling sites around the lake in April, August and October, 2019. The results showed that Chlorophyta, Cyanophyta and Bacillariophyta accounted for 39.7%, 26.5%, 20.6% of all the species, respectively. The species biodiversity indices (included Shannon-Wiener index, Margalef species richness index and Pielou index) increased first and then decreased from April to October, while the phytoplankton density decreased simultaneously. CCA revealed that pH, Turb, TP, T, NH3-N, CODMn, TDS and TN were the main environmental factors affecting the community structure of phytoplankton in Wolong Lake, among which TP, T and pH had a greater impact on Chlorophyta, Cyanophyta and Bacillariophyta, respectively.
The Screening and Identification of Heterotrophic Nitrified Aerobic Denitrifier in the Penaeus Vannamei Boone Aquaculture System without Water Renew
Authors: Yuncheng Xie , Shumin Wang , Xiao Lei 
Published: January 2021

Abstract
The experiments respectively take the artificial substratum (mesh) form the indoor aquaculture systems without water renew of Penaeus vannamei Boone as well as the mature bio-films. Through the complex inoculation on BTB ammonia, nitrite and nitrate medium, screened and obtained the library of the heterotrophic nitrified aerobic denitrifier. Selected 25 single colonies from the bacteria library of two membrane systems to conduct analysis based on the 16s rDNA PCR-RFLP and the results indicated that 50 colonies can be divided into 5 spectral types, in which 2 for the mesh, 3 for the coral sand. After sequencing, the blast comparison shows that all the heterotrophic nitrified aerobic denitrifiers are from the γ-proteobacteria (Gammaproteobacteria), where the bacteria on the mesh belong to the Acinetobacter sp.and Klebsiella sp.; while the bacteria on the coral sand belong to the Pseudomonas sp., Shewanella sp. and Klebsiella sp. According to the analysis on the phylogenetic tree, we know its evolutionary position is basically consistent with the traditional classification. Gram stain analysis indicates that all bacteria are red and belong to the Gram-negative bacteria. The research is of great significance for the selection of the heterotrophic nitrified aerobic denitrifier in the prawn aquaculture systems.
Simulation Study On The Influence of Roof Inclination On The Light Environment Of Solar Greenhouse
Authors: Yang Wenxiong 
Published: January 2021

Abstract
With the help of the first solar greenhouse light environment simulation software, the influence of different roof inclination on the light environment of solar greenhouse with the same ridge height is simulated. The results show that when the ridge height of greenhouse is constant and the inclination angle of roof changes, all the evaluation indexes in greenhouse change to different degrees. When the roof angle increases from 28 ° to 32 °, the cumulative light input on the floor and the total energy of light radiation in the greenhouse decrease by 22.4% and 11.7% respectively, and the uneven of light intensifies, which is not conducive to the growth of greenhouse crops. Therefore, it is not recommended to increase the inclination of the roof when the ridge height of the greenhouse is constant.
Effect of Modified Peanut Shell on the Removal of Cu(II) in Aqueous Solution
Authors: Peng Qin , Shi Guangyou , Yang Yan , Si Wantong , Li Qiang 
Published: January 2021

Abstract
The effective resource utilization of agricultural and forestry waste has always been a core issue in the field of environmental protection. In this study, nitric acid-potassium hydroxide (HNO3-KOH) was used to modify the peanut shell, and the effects of different adsorption time, initial concentration and exogenous Cr(III) addition on the adsorption of Cu(II) were investigated. The results show that the adsorption of Cu(II) on peanut shell raw material (HS-YL) and acid-base modified peanut shell (HS-SJ) was in accordance with the pseudo-second-order kinetic model. Isotherm study shows that HS-YL fitted Langmuir adsorption model, mainly exhibiting monomolecular and chemical adsorption. HS-SJ conformed to the Freundlich adsorption model, which was mainly controlled by multi-layer adsorption. Additionally, when Cr(III) and Cu(II) coexisted, HS-SJ could simultaneously adsorb two heavy metals in a large amount, showing stronger adsorption performance compared to HS-YL. Therefore, the acid-base combined modification method is one of the important ways to recycle peanut shells.
The influence of geological structure on the characteristics of groundwater pollution in the downstream of tailing pond
Authors: Si Wantong , Li Qiang , Ren Yanxia , Peng Qin , chen Quanzhou , Tian Mengjie , Cao Qingya , Yang Wanqing , Liu Jumei 
Published: January 2021

Abstract
A large number of high-concentration pollutants in the tailings pond polluted the local groundwater. The contaminated groundwater moves to the Yellow River (YR) 12 kilometers south of the pond through natural flow and diffusion. However, how close the contaminated groundwater to the YR was difficult to determine by visual inspection. Therefore, the groundwater quality was analyzed through borehole sampling, and the results show that the Nemero index of groundwater pollutants presents a puzzling V-shaped distribution from the tailing pond to the YR. Soil permeability analysis shows that the concentration of groundwater pollutants in the vicinity of the Yellow River had risen again, which was caused by the blockage of the clay layer in the alluvial plain of the Yellow River. The results demonstrate that the pollutants leaked from the tailings pond have reached the bank of the Yellow River. This pollution has already threatened the water quality of the Yellow River; corresponding measures should be taken to ensure the ecological safety of the Yellow River. It provides a scientific basis for solving similar environmental problems in future.
An Offshore Cleaning Vessel Based On Integrated Treatment Of Solid-liquid Pollutant
Authors: He Runhua , Zhang Yan 
Published: January 2021

Abstract
Aiming at the diversity pollutant species in offshore waters, people can’t collect the liquid contaminants and solid contaminants pollutants at the same time. So we designed a new type of offshore cleaning vessel based on integrated treatment of solid-liquid pollutant for practical. We proposed the general design of the program, completed the structural design and functional development. And we implement the integrated efficient monitoring and clean-up of the solid pollutants mainly composed of floating garbage and the liquid pollutant dominated by oil, by using the integration cleaning of solid-liquid pollutants technology and the intelligent recognition pollutants technology. We verified the control and function of the cleaning vessel through the production of ship prototype and the ship experiment.