bluuebunny/crossref_metadata_2025_split huggingface dataset:
Edge detection and location of seismic image based on PCNN
Authors: Lou Li , Chang XiangWei 
Published: May 2021

Abstract
The discontinuous features in seismic data usually correspond to different geological edge information. Effective processing of these seismic data can help us make correct geological interpretations. In this paper, we apply coherent slices to detect and locate the boundary of fault polygons and propose a method for boundary detection and localization of seismic images based on PCNN. In image edge detection, the basic PCNN needs to adjust many parameters. This paper aims at this problem to improve the basic PCNN model, we simplify the feedback input and pulse input, only retain the external input stimulation and the connection domain external neuron stimulation, reduce the parameters, and simplify the calculation. Optimize parameters such as internal activity link coefficients, dynamic thresholds, and cycle times to improve interpretation efficiency and accuracy. Experiments show that the method used in this paper has good practicability and can effectively realize the fault polygons detection and positioning of coherent slices.
Mineral Detection from Hyperspectral Images Using a Spatial-Spectral Residual Convolution Neural Network
Authors: Zeng Hao , Han Xiaoqing , Liu Qingjie 
Published: May 2021

Abstract
Mineral detection from hyperspectral images is an interesting yet challenging research topic in the remote sensing community. Although many efforts have been put into this field, mineral detection is still far from solved, because compositions of minerals are very complex. The features of an interested mineral are very hard to be distinguished from others. In this paper, we attack this problem by introducing recently developed deep learning techniques. Beyond the spectral feature, considering that minerals coexist with each other, which could be regarded as a piece of special context information and thus can be captured by a spatial convolutional neural network (CNN), we design a CNN architecture that is able to exploit both spatial and spectral features of minerals. We test the proposed network on Indiana Pines dataset and a large-scale hyper-spectral image, the results demonstrate that the proposed method is good at representing both spatial and spectral information of hyper-spectral images and it can successfully detect minerals from hyperspectral images.
Stratospheric contraction caused by increasing greenhouse gases
Authors: Pisoft Petr , Sacha Petr , Polvani Lorenzo M , Añel Juan Antonio , de la Torre Laura , Eichinger Roland , Foelsche Ulrich , Huszar Peter , Jacobi Christoph , Karlicky Jan , Kuchar Ales , Miksovsky Jiri , Zak Michal , Rieder Harald E 
Published: May 2021

Abstract
Rising emissions of anthropogenic greenhouse gases (GHG) have led to tropospheric warming and stratospheric cooling over recent decades. As a thermodynamic consequence, the troposphere has expanded and the rise of the tropopause, the boundary between the troposphere and stratosphere, has been suggested as one of the most robust fingerprints of anthropogenic climate change. Conversely, at altitudes above ∼55 km (in the mesosphere and thermosphere) observational and modeling evidence indicates a downward shift of the height of pressure levels or decreasing density at fixed altitudes. The layer in between, the stratosphere, has not been studied extensively with respect to changes of its global structure. Here we show that this atmospheric layer has contracted substantially over the last decades, and that the main driver for this are increasing concentrations of GHG. Using data from coupled chemistry-climate models we show that this trend will continue and the mean climatological thickness of the stratosphere will decrease by 1.3 km following representative concentration pathway 6.0 by 2080. We also demonstrate that the stratospheric contraction is not only a response to cooling, as changes in both tropopause and stratopause pressure contribute. Moreover, its short emergence time (less than 15 years) makes it a novel and independent indicator of GHG induced climate change.
Vegetation responses to climatic and geologic controls on water availability in southeastern Arizona
Authors: Sabathier Romy , Singer Michael Bliss , Stella John C , Roberts Dar A , Caylor Kelly K 
Published: May 2021

AbstractVegetation distribution, composition and health in arid regions are largely dependent on water availability controlled by climate, local topography and geology. Despite a general understanding of climatic and geologic drivers in plant communities, trends in plant responses to water distribution and storage across areas under different local controls are poorly understood. Here we investigate the multi-decadal interactions between spatial heterogeneity of geologic controls and temporal variation of climate, and their impacts on water availability to vegetation and plant responses (via normalized difference vegetation index, NDVI) in a monsoon-driven arid region of southeastern Arizona. We find that grasslands display low NDVI and respond directly to monsoonal rainfall. In the uplands, vegetation on west-facing slopes and in canyons share similar NDVI averages and variability, suggesting that they both use water from surface-groundwater flow paths through fractured rocks. Along the San Pedro River, streamflow, groundwater, and NDVI in deciduous riparian woodlands are strongly responsive to monsoonal rainfall, but water availability stratifies between wet (perennial), intermediate, and dry reaches, underlain by different local geologic controls that affect water table elevation. These controls interact with the driving climate to affect water availability in the shallow alluvial aquifer of the riparian zone, a primary water source to the gallery phreatophytes. A recent shift toward a strengthened monsoon in the region has led to an increase in water availability for grasslands and for dry reaches of the San Pedro, while the benefit is more muted along wetter reaches, where the riparian forest shows signs of having reached its maturity, with diminished trends in NDVI. These results have implications for the future vulnerability of dryland vegetation to climate change, which may be either dampened or intensified by local controls such as geology.
Effects of simulated acid rain on Growth of Lolium perenne
Authors: YIN P. , Peng Y.J , Song C.C , Liu X.J. , Huang J. , Lv X. 
Published: May 2021

Abstract
Lolium perenne is an important forage in China. In order to reduce the effect of acid rain on the quality and yield of Lolium perenne, Lolium perenne was used as material to study the changes of seedling growth and physiological characteristics under different pH conditions. The results showed that under the influence of simulated acid rain, the biomass and chlorophyll content of ryegrass changed greatly. The aboveground biomass and total biomass increased at pH 4.0 ~7.0, and the aboveground biomass and total biomass were the largest at pH 5.0, indicating that moderate acidity promoted the growth of Lolium perenne leaves. The chlorophyll content showed a double peak curve with the change of acid rain acidity, and reached the peak value at pH = 7 and pH = 3.5, respectively, indicating that acid environment was also conducive to the synthesis of chlorophyll in Lolium perenne leaves. Malondialdehyde content and relative conductivity increased significantly with the aggravation of acid rain stress, which was also a kind of adaptation and response mechanism of plants to environmental stress.
A New Diagnosis Method of Vibration Fault of Rotating Machinery Based on Information Exergy
Authors: Chen Fei , Cao Hao , Wu Xiaowen , Hu Sheng , lu Ling , Chen Wei 
Published: May 2021

Abstract
Vibration signal analysis is a foundation of fault diagnosis, while the common used method is to analyse the characteristic quantities extracted from an original waveform of a particular measuring point in a particular moment. It lacks of abilities in fault classification. Based on information fusion of process, two kinds of information exergy indicators are proposed and defined in this paper, to represent the change rule between different states in a same process and the rule of corresponding state changes in different processes. On this basis, a new fault diagnosis method of information exergy of rotating machinery based on space-time feature spectrum in frequency domain is first proposed. The method has been validated by analysing vibration signals and diagnosing faults of a rotor test platform.
Research on PMSM Vector Control System Based on MTPA
Authors: Li Yiheng 
Published: May 2021

Abstract
Built-in permanent magnet synchronous motors (PMSM) are widely used in social life due to their strong load capacity and high-performance speed regulation ability. This paper derives the equation conversion of PMSM from abc coordinate system to dq coordinate system, introduces the basic principle of the Maximum Torque Per Ampere (MTPA), and builds a simulation model based on the MTPA vector control system using MATLAB/SIMULINK, analyzes the changing law of the simulated waveform.
Research on Power Line Communication Technology of Energy Internet Based on Blockchain
Authors: Xia Fei , Wang Pengfei 
Published: May 2021

Abstract
Due to the gradual improvement of the energy Internet level, its requirements for the communication structure are also stricter. The key to the Energy Internet is the power structure control network. It integrates many distributed renewable energy sources, and meets the two-way intercommunication of energy and information by means of information and communication. Through the use of blockchain and smart contract technology in the Energy Internet to complete stable and automatic P2P energy transactions, it will be possible to optimize the work efficiency of the structure and optimize the cost. Power line communication technology generally covers power line carrier and industrial frequency communication technology. It is not necessary to build leased lines or collect public communication service fees, so that grid companies can make full use of their own resources. Based on the Internet and power line communication technology, this article discusses the dilemmas that need to be resolved in the construction of the energy Internet based on blockchain, so as to provide corresponding support for the optimization of heterogeneous networks in the future.
Artificial Intelligence Model Back-End Engine in Gathering Public Services in Carawali Village
Authors: Ramlan Pratiwi , Tajuddin Sapri , Adri Khaeriyah , Mardhatillah  , Febrianti Devi 
Published: May 2021

Abstract
Based on Law Number 6 of 2014 concerning Villages, making the village the main basis for development. Development is no longer centralized in urban areas (centralization) but must be spread throughout Indonesia (decentralization). The village has the authority to regulate the implementation of village governance autonomously. In the era of regional autonomy, the village is a very important part in determining the success of regional development which has direct contact with the community, especially concerning public services. This study aims to analyze the application of village websites in improving administrative services to the community in Carawali Village, Sidenreng Rappang Regency. This research uses descriptive qualitative research methods with data collection techniques using interviews, observation, and documentation. The method of data analysis is done by collecting data, reducing data, displaying data, and drawing conclusions. The results showed that the implementation of the Carawali Village website in providing administrative services to the community was good and following the current needs of the community for population statistics based on region, age, education, occupation, religion, gender, status, persons with disabilities, blood type, and other, likewise, making a certificate from the village can be done independently or with the help of village officials, but there is a lack of socialization that extends to all levels of society in Carawali Village regarding the function and role of village websites, so the use of village websites is still ineffective. from the current condition where there is still a lack of people who use the facilities and access the website.
Study on characteristics of tidal dynamics and vortex in Zhoushan Archipelago sea area
Authors: Zha Yueying , Li Li , Zhang Lu , Xia Yuezhang 
Published: May 2021

Abstract
Numerical modelling is used to study the characteristics and mechanisms of tidal dynamics and vortex in Zhoushan Archipelago sea area. Results show that amplitudes and current speeds of the semidiurnal tides decrease significantly when passing through the islands. Conversion of tidal energy, archipelago topography and formation of shallow-water tides are important reasons for the evolution of tidal waves. The ebb tide has a longer duration in the archipelago sea area, particularly in narrow channels. The M2-M4 constituents play a major role in tidal asymmetry. The flow paths of tidal currents change much, causing the high speed flooding/ebbing near the north/south bank. The tidal vortex is mainly distributed on both sides of and behind the islands, which is related to the shape of islands and the flow velocity. Referring to the current directions, positive/negative vorticity generally appears on the right/left side of the islands.
Research of evaluation method of auxiliary frequency modulation in gas turbine unit
Authors: Li Qiang , Yu Qingguang , Ma Yingxin , Jiang Zhicheng , Liu Yuming 
Published: May 2021

Abstract
In this paper, according to the mechanical structure of the gas turbine set and the process of primary frequency modulation, the models including the speed regulating system, combustion chamber, temperature control system, torque control system, acceleration control system and synchronous generator are established. Bidirectional DC/DC converter and inverter model are established according to the circuit structure and corresponding control strategy. According to the primary frequency modulation process of the gas turbine, the control strategy of the energy storage system participating in the primary frequency modulation is set. The energy storage system uses the traditional droop control strategy and combines the primary frequency modulation process of gas turbine to improve the frequency modulation performance of gas turbine and offshore platform microgrid. Finally, PSCAD transient simulation software is used to build offshore platform and a multi-platform interconnection micro-grid model, results of the simulation show high performance of the designed microgrid.
A Structure optimization method used in microgrid
Authors: Yu Qingguang , Jiang Zhicheng , Liu Yuming , Guo Min , Long Gaoxiang 
Published: May 2021

Abstract
This paper takes a large photovoltaic plant as a pilot platform to research the micro gird. In the micro grid, DC bus is the key structure, photovoltaic panels are the micro power source, lithium iron phosphate batteries are the energy storage device, and four converters are used as energy conversion device. This paper studies its specific characters such as component unit, control strategy, monitoring system and investment model. the paper builds a valuation model in the investing of energy micro system by using discounted cash flow model. According to power cost model, ecological and economic benefits are analysed and summarized, providing reference for the further application of construction on photovoltaic micro grid projects.
Plastic waste menace in Ghana, a serious threat to marine ecological diversity
Authors: Musah Baba Imoro , Peng Lai , Xu Yifeng 
Published: May 2021

Abstract
Plastic pollution is a major environmental concern due to the severe threats it poses to both terrestrial and marine ecosystems. The ocean health index for Ghana showed a consistent decline from 2017 to 2019 from a score of 63 to 59. Ghana is ranked 188th out of 221 exclusive economic zones worldwide. The annual imports of raw plastic materials are estimated to be 2.58 million metric tonnes and about 73% of the total plastic imports end up as waste materials. Plastic recycling represents an insignificant 0.1% while re-use plastics represent 19% of the total imported plastic materials. The analysis showed that the daily average solid waste generated per head in Ghana is 0.47 kg and it sums up to an estimated 12, 710 tonnes per day for the population. In the marine ecosystem, plastics waste becomes entanglement capable of causing injuries and fatalities to some marine species. Low recycling techniques coupled with improper solid waste disposal by the populace in coastal communities contribute significantly to marine pollution.
Territorial resources of Baikal zone: project development methodology
Authors: Arkhipkin O , Lapshin A , Bezrukikh O , Golik S 
Published: May 2021

AbstractThe main goal of the study is to form the methodological approaches in order to create a unified concept of socio-economic development of the territorial resources of the Baikal zone in terms of severe environmental restrictions; study and analysis of inertial factors; current trends in the transformation of the territorial and sectoral structure of the Baikal zone as a taxonomic subregion of the Baikal and Transbaikalia territory It was revealed that the main dominant in relation to the territorial resources is environmental protection. This limits both at present and in the future the effective use of the resource potential of the territory, since the methodology of the program of economic, economic and social evolution of the territory has not been formulated yet in the paradigm of the “new” economy where the traditional resources acquire new qualities via innovative technologies, including the quality of environmental feasibility. The article defines a set of industries that has been identified and whose development in Industry 4.0 and Agricilture 4.0 format, not disrupting the homeostasis of the territory, can serve as attractors of the socio-economic development of the unique territory of the Baikal zone. The article justifies that there is a necessity to distinguish the Baikal zone into “subadministrative” district in relation to the Irkutsk Oblast and Republic within the aquatic regions of Lake Baikal. The creation of the scientific and methodological Baikal center at the federal level, the transfer of managerial functions of the Baikal zone to a state corporation with the authority to administer a territory with quasi-legislative and quasi-judicial functions will help to solve the problems. The proposals about sources of financing for the implementation of the proposed Concept of socio-economic development of the Baikal zone are presented in the article.
Organization of vortex smoke gaz movement over the fuel layer to increase the efficiency of the work boiler unit KVm-2,5 in the village of Mishelevka, Usolsky district, Irkutsk region
Authors: Bochkarev V A , Dykus I V , Frolov A G , Khan V V 
Published: May 2021

AbstractComparative experimental studies of the boiler unit KVm-2.5 in the layer combustion and in the organization of vortex motion of flue gases (VMFG) were carried out in this work. Analysis of the boiler showed that the layer combustion is marked by low efficiency of the boiler unit, excessive fuel consumption, a large amount of harmful emissions into the atmosphere. One of the ways to improve the efficiency of fuel combustion and reduce harmful emissions is the organization of VMFG over the fuel layer. The results of heat-engineering calculations, which allow to estimate economic and ecological expediency of introduction of VMFG are presented in this article.
Diversification of activities in the land management services market in Irkutsk
Authors: Bunkovsky V I 
Published: May 2021

Abstract
Land management services are formed within the land market (taking into account the demand for land). At the same time, the effectiveness and quality of these services is not the solution of individual problems, but the application of a systematic approach, the design of a “turnkey” project and registration of life support systems in government departments. This provides a positive background for the creation of an enterprise that promises to provide land management services and maintain life support systems. The analysis showed that the market of land management services in the Irkutsk region is not yet busy enough and has prospects for growth.A firm is encouraged to apply intensive growth strategies to become successful. The implementation of the strategy takes 3 years. For the first year a company has been entering the land management market.In the second year, the company needs to create and meet the general demand for cadastral works in new territorial markets. In the third year of the company’s development, it is necessary to plan the expansion of services to a full range of survey work and enter the construction market. For this, the company is recommended to reduce prices for geodetic works at the expense of economies of scale. All stages of the company’s development must have marketing research of the markets, as well as the study of additional and hidden opportunities. The land management services industry is very attractive and can provide a stable income. However, entering the land management services market requires large investments.
Comprehensive optimization of field pipelines
Authors: Chupin V R , Maizel I V 
Published: May 2021

AbstractThe analysis showed that the solution of complex optimization of parameters of field pipelines is not given due attention. Traditionally, this operation is performed manually. The designer, using his experience and intuition, outlines several alternative options, which are then evaluated automatically, which does not provide an optimal solution. The paper proposes a method for indicative and adaptive management of field development and conservation, which allows us to take into account the uncertainties that arise in the future stages of field operation. At each stage of management, it is proposed to perform a comprehensive optimization of the main field pipelines and use the method of redundant design schemes with the solution of circuit-structural and circuit-parametric optimization problems, including the stages of field conservation. Numerical experiments have confirmed the high computational and economic efficiency of the proposed approach and method.
Development of ecological tourism: Russia and China
Authors: Dayneko D V , Dayneko A I , Dayneko V V , Potorochenko N A 
Published: May 2021

Abstract
Innovative development and further collaboration of Russia and China, when our countries experience EU and US sanctions, require a deep study of the domestic and foreign tourism experience. Today, ecotourism is of special interest in developed countries and should be an important component of the socioeconomic development of our countries. The work presents the modern concept and approaches to ecological tourism, the implementation of which is required for sustainable development of the countries and the promotion of local natural, cultural, and historical heritage. Ecological tourism plays an important role to preserve natural, historical and cultural values too. This type of tourism attracts many tourists and is, thereby, profitable from economic, social and political points of view, resulting in further lucrative collaboration between our countries. Some common benefits of ecological tourism are proposed for Russia and China, as the prospective centres of the world ecological tourism. Some recommendations for the further development of ecological tourism in the region are presented. The role of specially protected natural areas with its wealth of natural resources determines the conditions favorable for the development of eco-tourism and its forms in our countries. Therefore, the importance of ecological tourism in our countries is revealed.