bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optimal operation of tidal plants based on nonlinear model predictive control strategy
Authors: Shen Yang , Nyman Per-Ole 
Published: March 2021

Abstract
Tidal range barrage is a well-recognized approach to extract energy from tides in a large scale. Nevertheless, the complexity of tide oscillation poses a challenge to efficaciously regulate this type of plants. Optimization of the process control may result in enhancement of energy yield with low influences on environment. This paper presents a framework where the whole tidal-electric system is modelled and coupled with a nonlinear model predictive control (NMPC) strategy to determine the optimal state of turbo-generators over a complete spring-neap cycle in a month. The method allows the system model to be nonlinear and dynamic under tight constraints, which would be extremely appropriate for the deployment of this highly predictable but frequently varied energy. A potential bay in Norway is chosen to be a proposal site to verify the benefits of the control strategy, by comparing the energy extraction between a simple barrage without sluices and a conventional one with sluices assembly. Results show the conventional barrage type is superior with respect to energy generation, while keeping the turbine blade diameter as as factor. For excessively large turbines, though, the revenue may be curtailed by costs due to environmental factors, and turbine construction.
Research on the Construction Elements of the New Generation Power System
Authors: Li Zhuonan , Zheng Kuan , Wu Shengyu 
Published: March 2021

Abstract
With the massive consumption of fossil energy, the traditional power system can no longer meet the high-quality development of the economy and society and the strict requirements of the ecological environment. The whole society urgently needs to build a new generation of power system to achieve the healthy development of the economy and society under increasingly strict constraints. For the new generation of power systems, the mainstream direction is that they should promote the deep replacement of fossil energy with electric energy in the energy consumption link, and increase the proportion of electricity in the final energy consumption and clean power generation. In addition, it should also include the informatization, intelligence and digitization of the power and even energy systems, and realize the iterative optimization of the whole system with faster communication and faster computer processing technology. In this paper, Dematel analysis method was used to identify and screen the construction elements of the new generation power system. And the role of each element in the construction process was analyzed, thus the key areas in the construction of the new generation power system were clarified.
Engineering design and static load test of Soil filling pile with spiral cone foundation
Authors: Jin Zhengchao , Fang Guangxiu , Zhao Shifan 
Published: March 2021

Abstract
This paper introduces the innovative soil filling pile with spiral cone technology, and through the soil filling pile with spiral cone foundation static load detection of phase 4 project of Bishui Gardens, Yanji City, Jilin Province, proposed the following design suggestions: When the diameter of the pile is 500mm, the length of the pile is 12-20m, the maximum settlement interval is 28.04 ∼ 44.85mm; the vertical ultimate bearing capacity of single pile is 3600∼4000KN. The pile can speed up the construction period, ensure the project quality and reduce the project cost. It has obvious technical advantages and has obtained good economic and social benefits. It is a new type of energy-saving and emission-reduction pile foundation with extensive application prospects.
Micro-scale investigation on the effect of waterflooding rate on oil recovery and residual oil distribution
Authors: Zhang Tongyao , Chen Ke , Zhang Xudong 
Published: March 2021

Abstract
Waterflooding is currently one of the most common and mature oil and gas development methods. However, when oil and gas fields enters the medium or high water-cut period, there is still a large amount of residual oil remaining untapped while residual oil characteristics and distribution could be complicated. Micromodel method is considered as a novel experimental method for studying residual oil characteristics and waterflooding. Unlike conventional core flooding, visualization of the whole process can be realized through micromodels. In this work, three different flooding rates were used to simulate the waterflooding process via micromodels. Consequently, oil recovery rates and residual oil distribution were obtained. It was observed that higher waterflooding rate increased the oil recovery. When the flooding rate was large, dispersed residual oil was observed after waterflooding. When the rate was small, residual oil exhibited more complicated configurations. For the trapped residual oil in the dead end pores in hydrophilic rock matrix, increasing the flooding rate or the viscosity of displacing phase could be beneficial to dislodge the residual oil.
Acidizing Treatment Reconstruction Practice for Limestone Resources
Authors: Taiwei Yang , Yu Yan , Shuzhao Guo , Qingqin Cai , Yang Yang , Yuqiao Du 
Published: March 2021

Abstract
With abundant oil and gas resources, limestone oil and gas resources are characterized by complex composition, uneven distribution, low natural productivity, and susceptibility to contamination, acidizing is an important measure to put this kind of oil and gas wells into production and increase production, but the effect of acidizing measure varies from block to block. This paper attempts to identify the difficulties in acidizing process by analyzing the reservoir character of multiple limestone reservoir systems in D Oilfield region, and to finalize matrix acidizing, retarded acidizing fracturing and multi-stage injection fracturing as three alternatives through single-well and block analysis, according to the permeability, pore throat development and lithological character. After the acidizing measure was implemented, good results were attained.
Design of renewable energy consumption market system based on the interactive transaction of source-grid-load-storage
Authors: Liu Dunnan , Zhang Tingting , Li Hua , Liu Mingguang , Jia Heping 
Published: March 2021

Abstract
Renewable energy has the characteristics of clean, safe and low variable cost. High proportion of renewable energy access is of great significance for improving energy structure and improving power economy. However, with the continuous increase of renewable energy access ratio, in the case of full guaranteed acquisition, the peak load regulation capacity of power generation side will be insufficient, which can’t meet the requirements of full purchase of renewable energy, resulting in the phenomenon of power abandonment. It is urgent to stimulate the interactive ability of all users to participate in the consumption of renewable energy. Based on this, this paper puts forward a renewable energy consumption market system which includes medium and long-term, day ahead and real-time trading mode to promote the interaction between source network and load storage. Through the design of the mechanism, we can give full play to the regulatory potential of the user side and let the more efficient renewable energy units obtain more auxiliary service resources.
Technical Analysis of Grid Connection of High-speed Railway Power Through Lines
Authors: Chen Xiaolin 
Published: March 2021

Abstract
For the power communication system of the high-speed railway, the power through line is the core power supply line, and its operation effect has a vital effect on the safety and stability of the high-speed railway operation. However, because the power penetrating line is largely restricted by the power system, and the lightning protection measures and insulation level are relatively weak, the grid connection is also very difficult. In order to realize the effective grid connection of high-speed railway power through-line, this paper analyzes its grid connection technology. In this analysis, it first analyzes the overall overview of the high-speed rail power penetration system; then it analyzes the specific principles of grid connection of the high-speed rail power penetration line; Finally, the simulation calculation and analysis of the specific grid connection are carried out. It is hoped that this analysis can provide sufficient technical support for the grid connection of the high-speed rail power through-line, so as to improve its application effect and safety.
Fault location of hybrid distribution lines based on empirical mode decomposition
Authors: Song YunDong , Han Honggang , Liu Miao , Wang Guanyu 
Published: March 2021

Abstract
This paper presents a fault location method for cable hybrid distribution lines based on EMD and TEO algorithm. Firstly, the fault signal is decomposed by EMD. Then, the transient energy spectrum of high frequency imf1 component is obtained by using Teager energy operator. The first energy singularity is the time when the fault initial traveling wave head reaches the detection point. Finally, the fault location is carried out according to the fault search algorithm based on time variable. According to the simulation results, EMD and TEO methods have better fault extraction ability and higher accuracy in fault location.
Research on the Relationship of Symbiotic Subject in Urban Energy Saving Innovation Ecosystem
Authors: Hong Shuai , Li Zhiyu , Zhang Mengyuan 
Published: March 2021

Abstract
As an important space carrier of sustainable development of human settlements, cities are the basic regional units to promote energy saving innovation, improve energy efficiency and reduce emissions. It is very important to promote the process of urban sustainable development. On the basis of literature review, the government and energy saving enterprises are identified as the symbiotic subjects of urban energy saving innovation ecosystem. Based on logistic equation, this paper constructs a dual agent symbiosis model of urban energy saving innovation ecosystem. The simulation results show that the positive and negative of the symbiosis coefficient is an important parameter affecting the results of symbiosis equilibrium on urban energy saving innovation ecosystem. When the symbiosis coefficient is negative, the coordination and promotion between symbiotic subjects is greater than competition and competition, which makes the existing resources meet the needs of more symbiotic subjects to participate in urban energy saving.
Study on regeneration and desiliconization purification of pickling waste liquid of building steel
Authors: Shining Chen , Chengnian Tang 
Published: March 2021

Abstract
In this paper, Fe2O3 power was used to replace the scrap steel in the traditional process, as the medium for removing the free acid in the waste acid solution of the cold-rolled strip pickling. The removal effect of free acid and silicon of the system with Fe2O3 addition and crap steel were compared. The results indicated that the system with Fe2O3 addition obtained a better effect. Subsequently, the optimum dosage, optimum reaction temperature and time were determined by the orthogonal experiment. The effect of flocculants of polyacrylamide (PAM), PAC, PAM+PAC and MgCl2 with the desiliconization was explored.
The Assessment of Modern Community Security Risks in Megacities Based on the Dempster–Shafer Theory
Authors: Yin Ke , Zhou Haiyun , Chen Jimin , Zhao Chen 
Published: March 2021

Abstract
Through the study of community security risks in a megacity by employing the Dempster–Shafer theory, this paper developed an indicator system for the assessment of urban community security based on a combined array of both static and dynamic factors including natural disasters, man-made hazards, community administration and security support. A proper model was thereafter designed. Precluding content inadequacy, insufficient indicators and model inaccuracy and other problems occurred in preceding assessments predicted upon a combination of both static and dynamic factors, these efforts have enabled more effective urban community security assessment through a case study.
Research on Intelligent Trash Bin Design Based on Visual Recognition of Machine
Authors: Gu Junpei , Zhang Jianyi , Sui Haolin , Zou Bingxin 
Published: March 2021

Abstract
Objective: To help the public solve the problem of garbage classification by means of science and technology, make automatic garbage classification through an intelligent trash bin, realize harmless garbage disposal and reduce pollution, thus facilitating environmental protection.
Methods: The type of garbage is determined by visual recognition of a machine to achieve the effect of garbage classification. In terms of visual recognition, feature points of garbage pictures are compared by the combination of hardware and software, the data is trained and optimized with deep learning technology and images are compared based on the VGG16 convolutional neural network model.
Result: A simple and small intelligent trash bin is obtained. Conclusion: Theoretical support is provided for the application of intelligent classification trash bins.
Application Research of Intelligent Control Algorithm in Air Conditioning System
Authors: Yang Xin , Zhao Yuqing , Deng Jiayu , Tang Shengshi , Su Hexuan , Zhao Xinran 
Published: March 2021

Abstract
In order to reduce the energy consumption of HVAC system, we analyzed and compared modern intelligent control algorithm applied to HVAC control system, introduced the basic principles of fuzzy control, neural network and genetic algorithm, and analyzed the applicability of intelligent algorithm in HVAC system with engineering examples.
Sea Restoration and Assessment of Ecosystem in Ningbo City
Authors: Liu Hongdan , Jin Xinfei , Shen Chen , Ying Hong , Wu Weifei , Zhou Xuerong , Liu Xu , Dong Haiyang 
Published: March 2021

Abstract
From the perspective of the demand of marine ecosystem service function, this paper collects, sorts out and analyzes the marine ecological restoration related work by reclamation survey, mainland coastline survey, island coastline survey, blue bay application, coastal zone restoration project, ecological assessment and restoration of reclamation projects in counties (cities and districts). The successful experience of marine ecological restoration is analyzed, summarized and explored to present a relatively complete and typical marine ecological restoration scheme. Through the case study of typical ecological restoration, the optimized marine ecological restoration procedure is established. According to the development status and problems of different sea areas and coastal zones, the most suitable marine ecological restoration scheme is found, so as to solve specific marine environmental problems, and provide case reference and theoretical basis for subsequent marine ecological restoration.
Research on the Requirements of Artificial Intelligence on Applied Talents Cultivation
Authors: Liu Wenhua 
Published: March 2021

Abstract
Strengthening the training of artificial intelligence talents and developing the artificial intelligence industry should be the only way to gain a foothold in the future of technology and talent competition. At the same time, it can promote the establishment of the highland of independent innovation in the field of AI. Talents market situation provides new requirement to talents cultivation in universities. But it should also be noted that AI development in universities meets with pretty problems. These are the newly-constructed related programs just growing in recent few years, the weakening of AI faculties in universities, especially the fragmentary of education system. Therefore, universities should promote the development of quality programs in the field of AI to get a new goal of talents cultivating. Otherwise, we should strengthen the integration and cooperation between AI and other applied programs to perform AI program structure and keep on classified and stratified cultivating to form a brand-new mode of talents training in all the field of AI.
Influent property forecasting of sewage treatment based on big data analysis approach
Authors: Cheng Zhiwei , Xie Zhihong , Deng Yongsheng , Wang Xiaodan 
Published: March 2021

Abstract
Precise influent property forecasting is very important to maintain the stable operation of sewage treatment procedure. A big data analysis method of combining the wavelet packet transform (WPT) and adaptive network-based fuzzy inference system (ANFIS) is reported to solve this problem. In this approach, the WPT is used to decompose the influent property data in different cycles. The time sub-series, which are results of wavelet coefficients reconstruction, are employed to establish the forecasting system. The forecasting sub-results of each cycle are eventually integrated into an overall forecasting result. Furthermore, chaos theory is introduced to obtain the input structure of the multi-cycle regression models. The reported approach is verified by the historical influent property. A back propagation neural network and the standard ANFIS are used for a comparison test. The results demonstrate that the reported method has best ability in the peer models.
Whole-process Risk Identification of Urban Rainwater Resource Utilization and Construction of Evaluation Index System in Loess Plateau Region
Authors: Qin Li , Ma Chengxiang , Mu Yunxiao 
Published: March 2021

Abstract
The whole process from the external environment of urban rainwater resource development and utilization, urban natural and social characteristics, engineering system, to engineering operations management, etc. was taken as the basic environment for the risk identification of urban rainwater resource utilization, and it was proposed that the urban rainwater resource utilization risk was the positive or negative effect generated by all uncertainties in the whole urban rainwater development and utilization process on the urban rainwater resource utilization goals; based on the risk identification environment and risk definition, the urban rainwater resource utilization risk was divided into social environmental risk, ecological environmental risk, water volume risk, water quality risk, and water price risk, and an list of evaluation indexes, which consisted of target layer, criterion layer and index layer, was comprehensively established for the urban rainwater resource utilization risk; according to the characteristics and current situation of typical urban rainwater resource utilization in Loess Plateau region, the principal component analysis (PCA) was used to screen out 14 evaluation indexes reflecting the urban rainwater resource utilization risks in Loess Plateau region, and an evaluation index system was further constructed, thus laying a foundation for the risk evaluation and control of urban rainwater resource utilization.
Research and Development of Light Municipal Technology System Based on Green Development Concept
Authors: Huang Fei , Xue Xiaoning , Yin Wenchao , Xu Bin , Zhao Xin , Wei Guqiang , He Zirui 
Published: March 2021

Abstract
The application of a light municipal system will become an essential means to improve cities’ total carrying capacity and realize the sustainable development of green ecology in urban and rural areas. The green technology system adopted by a light municipal system’s regional development model can reduce traditional municipal facilities development’s initial cost. The saved investment cost of early facilities is enough to offset the increased late green technology application cost. While the region realizes green development, the overall economy can also be fully guaranteed. This paper analyses the light municipal system’s applicable conditions to popularize and apply this technical system in a broader range.
Modernisation of the Energy Charter Treaty in Environmental Protection: Challenges and China’s Role
Authors: Zuo Mengxue 
Published: March 2021

Abstract
The Energy Charter Treaty is the only legally binding multilateral framework in the field of energy, playing a key role in energy investment protection, green energy, and climate change solution. However, it is difficult to address the issues that have arisen as a result of the regional concentration of States parties, vague expression of the provisions, and the treaty’s role in protecting the environment and promoting sustainable development of energy. Therefore, the modernisation of Energy Charter Treaty becomes the inevitable choice at present. Only through emphasizing the respect for multiculturalism and concentrating on the industry’s interests can the right way to modernisation be found. During this process, China, a new major energy investor, seeks green development and clean energy, with the goal of sustainable development that is consistent with the principles of the Energy Charter Treaty. As a result, China plays a crucial role in the modernisation of the Energy Charter Treaty.
Conglomerate but not Homogenized
Authors: Rosen Jeremy 
Published: March 2021

AbstractThe essays collected in “Literature and Publishing, 1945–2020” consider the ways the conglomerated global publishing industry has incorporated and commodified varied genres and target publics. The essays employ intensive archival, ethnographic, and computational methods, and they dive into often-neglected genres, in order to fill in this familiar narrative outline with vivid detail, complicating it and at times discovering countervailing trends that persist within conglomerate publishing’s pursuit of short-term economic profit. While the contributors tend to emphasize the dominance of an increasingly homogenizing corporate aesthetic inimical to experiment, they also acknowledge the potential for individual writers, editors, and agents to intervene in the market, shifting and diversifying the field and preserving literary values, even as they attend to the fiscal bottom line. This commentary stresses the variability of genre, publishers’ persistent search for novelty, and conglomerates’ desire to compete for prestige with small but influential independent presses in order to explain the continued efflorescence of a dazzling diversity of contemporary literary production within a field that continues to consolidate dramatically at its top end, and whose retail side is dominated by a single behemoth.