bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development Model of Community Forest in Bulukumba Regency, South Sulawesi, Indonesia
Authors: Nuraeni  , Rasyid R , Rosada I , Ilsan M , Saida  
Published: October 2019

Abstract
Forests as a model of national development have significant benefits for the living and livelihood of society. It gives balance and dynamic benefits in either ecological, socio-cultural or economic sides. The study aims to develop a development model of community forest in Bulukumba Regency, South Sulawesi, Indonesia. The selection of respondents was carried out purposively, namely selecting respondents who were involved in community forest management. Methods of data collection in this study were conducted through interviews, discussions, questionnaires and field surveys. The respondents came from various experts and stakeholders related to community forest development activities. The secondary data collection was obtained from literature sources and documents from related institutions with this research. The analytical method used is a dynamic system analysis method for community forest development in Bulukumba Regency consisting of needs analysis, problem formulation, system identification and model simulation. The research result showed that the dynamic model of community forest management was built with three (3) sub-models, namely; community forest area, community forest production, and economics of the community forest. The scenarios built in this community forest development model are a combination of four (4) aspects, namely the policy of community forest development, the effectiveness of the nursery, the management system and the existence of counselling. The simulation result of the community forest development model in Kajang District was the optimistic scenario.
Peanut Productivity Under The Albizia Stand In Agroforestry System
Authors: Susanto A , Mujiyo  , Purnomo D , Budiastuti MTh S 
Published: October 2019

Abstract
An effort to meet the national food need is by utilizing productive forest areas under albizia stands. Food stuff such as peanuts can grow under albizia forest stands. The purpose of this research was to know success of agroforestry system implemented to tree after initial release of contract. This study was conducted under albizia stand of state forest Blitar in East Java. Research design was used in this study was randomized block design. 4- year- old albizia stages with 0%, 25%, 50 % trimming intensity with plant spacing of 2 m x 3 m, 3 m x 3 m, 3 m x 4 m. Albizia trees that used for this comparison as many as 120 albizia trees. Results showed that soil lies under 4-year-old albizia trees still produced peanut with highest weights 129 g/m2 and lowest weight 117 g/m2 while highest biomass about 115.10 g and lowest biomass about 98.23 g. Application of agroforestry system under 4-year-old albizia stand is still good and intensive, creating work, improving social welfare, local community opinion change into positive perceptions for forestry development, forest protection, forest fire prevention, reducing rapid forest degradation and environmental quality conservation of forest areas.
Study of The Potential Expansion of New Rice Fields in Central Maluku District to Support Food Security in Maluku Province
Authors: Rusmin N , Edy S , Robby A , Dwi K R 
Published: October 2019

Abstract
Central Maluku district is one of the priorities region in the development of paddy fields in the province of Maluku. Maluku province was only able to meet the needs of 58% of the rice. Fulfillment needs rice is one of the Government’s efforts in food self-sufficiency. Increased agricultural productivity through the extension of new rice fields became one alternative settlement in fulfilment of rice. The increase in rice production through the expansion of rice fields is still possible. The success of the process of the expansion of paddy fields depend on the expansion of the activities in the rice production. The process of the expansion of rice fields is preceded by feasibility investigation location. Feasibility study of the site was conducted to find out the feasibility of potential land with the observations in the field which is then processed and spatial dianalis in using ArcGIS software. Results of a survey investigating the Central Maluku with the total area of 594.29 ha based on the suitability of the land for the potential expansion of new acres of rice paddies 587.35 ha from 2 (two) subdistricts include North Eastern Seram Subdistrict Kobi m2 170.87 ha and North Seram Subdistrict covering 416.82 ha.
Gauss polynomials based modelling of grid-connected PV system output power in high-altitude area
Authors: Wang S , Zhao S J , Ma Y Y , Gao D D 
Published: October 2019

Abstract
Complicated ordering management and improper providing electricity are a problem encountered during the PV system generate electricity. Accurately predict the output power is an effective approach for minimizing these problems. In this paper, electric power exchange relationship of each link is analysed, according to the topology of the photovoltaic (PV) power stations. We propose the under prediction model of output power, based on the theory model of output PV current in the high-altitude environment. The composite error could be calculated by the difference between the under prediction power and the measure power. Comprehensive error expression is obtained by using the high-order polynomial fitting method. An improved prediction model, which adapts to the high-altitude environment, is established, while compensate the original model with the composite error. Compared with the actual output power of the PV power station, the results show that the curves of the two are highly consistent, the correlation between the two is more than 0.8 and the relative error between the predicted and measured power is less than that of the under-predicted power model. The results show that the improved predictive power model has a good tracking performance.
An Engineered solar crop and meat dryer for rural Africa: A techno-economic outlook
Authors: Kanyarusoke K E 
Published: October 2019

Abstract
This paper introduces a new solar crop dryer design for small scale entrepreneurs going into crop storage and marketing. It is an indirect drying system requiring 2 m2 ground space for installation of both the 2 m2 collector and the 1 m3 dryer chamber. Both collector and dryer are designed de-novo, and manufactured to give one assembly. The assembly is then analysed for heat and mass transfer using both TRNSYS and MATLAB software. For places with an equatorial climate, the system is predicted to be adequate for a start, with daily moisture removal limits of between 12 and 15 kg. This translates to a drying rate of about 20 kg/day wet produce from 75% to 12% moisture content. An economic analysis is done for two cases of direct manufacture and importation. In either case, it is found that breakeven is possible within the first one to two years of acquisition for high value products - in part because of the heavy crop and price losses currently experienced with sun drying. It is therefore concluded that the new product may not only be helpful in reducing food waste, but that it might also have economic viability to commercial entrepreneurs.
Status and trend analysis of solar energy utilization technology
Authors: Sun T Q , Cheng D L , Xu L , Qian B L 
Published: October 2019

Abstract
Based on global distribution of solar energy and its feature, this paper discusses a review about solar energy’s utilization techniques, mainly discusses the latest development of photo-thermal and photoelectric utilization technology, which are mature and widely used. Through looking forward to the development trend of solar energy utilization from the aspects of improving efficiency, reducing cost, and diversifying utilization methods etc., we find that the utilization of solar energy resources has entered the fast track of development. In order to promote the connectivity of solar energy technologies and standards and to enhance the capacity of the solar energy industry, this paper put forward the advices on setting up an international platform for technological innovation and cooperation to make efficient use of global technological innovation resources.
The applications of echelon use batteries from electric vehicles to distributed energy storage systems
Authors: Pan A Q , Li X Z , Shang J , Feng J H , Tao Y B , Ye J L , Li C , Liao Q Q , Yang X 
Published: October 2019

Abstract
Echelon use batteries from electric vehicles will bring not only the cost reduction of energy storage but also the social benefits of circular using of resource, energy conservation and emission reduction. It is an important echelon use orientation that retired batteries from electric vehicles are rebuilt into distributed energy storage systems. The article introduces 8 cases of distributed energy storage systems containing echelon use batteries, whose application scenarios include load shifting, renewable energy storage, frequency modulation of power system, and capacity charge management. In summary, the reconstruction of echelon use batteries is based on battery packs or modules in order to reduce the cost of their secondary development as much as possible because the advantage of echelon use batteries is low cost after all. Echelon use batteries should be used under the regime of low rate and / or shallow charge-discharge for the sake of their cycle life and safety. Besides, a set of distributed energy storage system containing retired batteries from ROEWE e50 electric vehicles was developed by us and its application effects in a distributed PV generation station was introduced. Ten 3P3S retired batteries modules with similar capacities are rebuilt a 5 kWh energy storage system with 50 V rated voltage, whose energy transition efficiency is about 88%. Energy storage applications of retired batteries from electric vehicles in distributed PV generation not only supply electrical loads with stable power, but also achieve peak shaving of solar electric power.
Distribution characteristics of circular grounding ground potential in HVDC transmission system
Authors: Wang L D , Mo F J 
Published: October 2019

Abstract
This paper presents a model of double-ring type grounding pole unequal depth embedding for high-voltage direct current (HVDC) transmission system; and introduces calculation formula of DC ground potential distribution when double-ring type grounding pole is unequal buried. Furthermore the ground potential distribution and stride voltage level around the grounding pole and influence of grounding depth and soil parameters on the current field are discussed in this paper. The electric field zoning model of the ring current source is established by using the power system grounding pole analysis software CDEGS to verify the feasibility of this method. As the model is able to make the grounding current overflow density and potential distribution as uniform as possible, there is no serious local current concentration.
Location support system for energy clusters management at regional level
Authors: Szewrański S , Bochenkiewicz M , Kachniarz M , Kazak J K , Sylla M , Świąder M , Tokarczyk-Dorociak K 
Published: October 2019

AbstractThis study provides the location support system solution for the new Polish Energy Policy to 2040. The Location support system combing geographic information system (GIS) with business intelligence (BI) analytic environment is developed. The Decision Support System in this research integrates three renewable energy sources (RES): biomass, solar and wind. The renewable energy technical potentials are analyzed in relation to the local human development index (LHDI) and the average use of low-voltage electricity [kWh per capita] in rural households. The research indicates internal diversification of the country in terms of energy consumption, level of development and potential to renewable energy production. The most developed rural areas are in the west of the country and in the vicinity of large cities. Regions suitable for biomass production are located in S-W and W part. The best conditions for solar energy sector are in the S, S-E and central regions. Good wind conditions are in central Poland and locally at the Baltic coast as well as in sub mountainous regions in the south. The newly developed analytical system can be effective instrument, which can strengthen the production and consumption of renewable energy in rural areas. As an added value, it should improve the quality of life of local communities. The results of the study support decision makers in sustainable energy cluster allocation and management.
Research on electrified railway power router based on 81 level conversion technology
Authors: Shu Y H , Zhang C Z , Wang Q 
Published: October 2019

Abstract
On the premise of realizing the application of renewable energy power generation in traction power supply system, aimed at the problems of power scheduling and operation cost in the traction network of 27.5 kV electrified railway, a kind of electrified railway energy router device based on 81 level conversion technology is proposed. The device adopts 81 level converter to realize the high voltage, high power quality and high power demand of grid-connected converter for electrified railway energy supply system. The energy dispatching mode of voltage-phase angle is adopted to ensure the normal power supply of electric locomotive and the voltage support of traction network. At last, the bidirectional converter of the energy storage unit realizes peak cutting and valley filling of energy and ensures the stability of renewable energy generation. Based on the theoretical study of the topology, technical principle, energy scheduling calculation and control strategy of the new electrified railway power router, the device was simulated and verified, and the effectiveness of the electrified railway power router technical solution was verified.
Calculation method of distribution network limit line loss rate based on fuzzy clustering
Authors: Yuan X Y , Tao Y L 
Published: October 2019

Abstract
In view of the characteristics of 10kV distribution network lines, in order to analyze the line loss rate and determine the loss reduction space, this paper proposes a calculation method of the limit line loss rate (LLLR) based on a series of current LLLR indicators. Firstly, according to the difference between different line characteristics and operation parameters of distribution network, the index which has a high impact on the LLLR is screened out, then the clustering index parameters are extracted, and clustering analysis is carried out by using the fuzzy C-means algorithm. According to the clustering results of feeders, the reference feeders are selected for each type of feeders, and the equivalent resistance method is used to calculate the LLLR under the limit conditions. For intra-class non-reference feeders, the adjustment coefficient method is used to calculate the LLLR, and the LLLR is corrected by checking whether the line loss rate obeys the normal distribution. Taking the distribution network data of a city as an example, the LLLR is calculated, which proves the validity of the method.
Study on transnational environmental damage along the belt and road and its enlightenment on international energetic policy
Authors: Lu W 
Published: October 2019

Abstract
This paper selects the most tabular areas of Central Asia and Southeast Asia along the route of Belt and Road Initiative and analyzes the causes and current situation of the cases of transnational environmental damage in the two regions. Through the data and charts, this paper sums up the present situation of the co-existence of nuclear pollution and Aral Sea crisis in Central Asia and the serious pollution of water resources caused by frequent fire in Southeast Asia. And this paper analyzes the impact of this environmental situation on the formulation and implementation of energy policy along the Belt and Road.
Simulation of Hydrogen Combustion Characteristics in Argon-Oxygen Compression Ignition Engine using Large Eddy Simulation (LES) Turbulence Model
Authors: Nasruldin Muhammad Arif Arsyad , Mansor Mohd Radzi Abu 
Published: October 2019

Abstract
Hydrogen combustion in a noble gas atmosphere will increase thermal efficiency because of higher specific heat ratio. During the compression stroke, noble gas produces a higher temperature at the same compression ratio compared to standard air compression. Argon is the best noble gas in this study because it is abundant and readily available. In this study, argon replaced the nitrogen and formed the argon-oxygen atmosphere in a compression ignition engine. The objectives of this study are to determine the suitable initial temperature for simulation work based on the experimental value and to study the effect of injection parameter changes towards combustion and emission characteristics. This study uses Converge V2.4 CFD simulation based on Yanmar NF19SK engine parameter. The turbulence model used Large Eddy Simulation (LES) due to accessibility in extensive eddies calculation that has a significant fraction of energy. Thus, combustion analysis accuracy also increased. Base grid of 5mm with adaptive mesh refinement (AMR) and fix embedding is chosen based on simulation time and computer storage. Combustion simulations involve changing of initial temperature, the start of injection (SOI) and injection pressure to obtain pressure and heat release rate data. At intake temperature of 370K, hydrogen combustion shows the highest peak pressure, and for intake temperature at 500K, SOI of 700 °CA produces the highest peak pressure for the combustion. Ignition delay increases as the temperature and injection pressure decrease.
Self-excited oscillation study in grille-cavity flow on floating nuclear power platform
Authors: Li B M , Lin Y S , Huang C H , Gou J L , Zhang K L 
Published: October 2019

Abstract
In order to investigate the self-excited oscillation characteristic of flow past the inlet and outlet of cooling water systems on floating nuclear power platform, a numerical study in grille-cavity flow with suction and drain is carried out. A back pressure condition is set on the side wall of the cavity to simulate the suction and drain conditions. By varying the incoming flow boundary layer thickness and back pressure value, the self-excited oscillation characteristic in grille-cavity flow with suction and drain is studied. As calculations show, the boundary layer thickness has little influence on the oscillation frequency. The strength of self-excited oscillations gradually decreases with the decrease of back pressure, but the frequency does not change much. When the back pressure reduces to a critical value, the self-excited oscillation phenomenon disappears finally.
Power system joint energy and reserve scheduling model considering variable speed pumped hydro storage for mitigating wind curtailment
Authors: Zheng T T , Li Y W , Yang P W , Chen X L , Zheng R , Miao S H , Ji H , Yin H R 
Published: October 2019

Abstract
The large-scale integration of wind power brings great challenges to power system secure and economic operation. In order to address this challenge, the variable speed pump storage hydropower plant (VS-PSHP) technology and demand response technology have addressed a lot attention. In this paper, the coordination of the thermal power generator, the wind power plant, the VS-PSHP and multi-type flexible loads are considered, and a day-ahead and real-time coordinated scheduling model are proposed. The proposed model can formulate the generation, contingency reserve and power distribution factor schedules simultaneously. Numerical simulation results indicate that the coordination of VS-PSHP and multi-type flexible loads can increase the system operation economic and mitigating the wind power curtailment. The results also show that the VS-PSHP is good at providing contingency reserve, and the participation of VS-PSHP can lead to a relatively lower total system operation cost compared to the participation of fixed speed pump storage hydropower plant (FS-PSHP).
Research on the technology of abnormal discharge detection device for metal fittings based on optical fiber signal transmission
Authors: Wang X Y , Sun X D , Chen X L , Wang J F , Chen C F , Dou Y Y 
Published: October 2019

Abstract
This paper aims to develop an abnormal discharge detection device based on optical fiber signal transmission, and realize the reliable detection of abnormal discharge between fittings of high voltage electrical equipment. The detector and visible light detector developed in the arc light detection part can realize the efficient detection of ultraviolet light and visible light in the arc light. By optical fiber far - range signal transmission structure, this design developed multifunctional optical signal collector, which can be converted into analog electric signal, state quantity signal, digital quantity signal and other forms while collecting arc light efficiently.
GAN-Based Augmentation for Improving CNN Performance of Classification of Defective Photovoltaic Module Cells in Electroluminescence Images
Authors: Luo Z , Cheng S Y , Zheng Q Y 
Published: October 2019

Abstract
Electroluminescence (EL) imaging is an effective way for the examining of photovoltaic (PV) modules. Compared with manual analysis, using Convolutional Neural Network (CNN) for classification is much more convenient but it requires a certain amount of annotated training samples which cannot be acquired handily. In this paper, we present a method for augmenting the existing dataset of EL images using Generative Adversarial Networks (GANS) and propose a model called AC-PG GAN aiming at this. Three chosen CNN models are used to examine the effectiveness of the proposed GAN model and have achieved an improvement of the classification accuracy with the augmented dataset after some adjustment and the maximum improvement is up to 14%.
Thermoelectric energy harvesting in aircraft with porous phase change materials
Authors: Madruga S 
Published: October 2019

Abstract
We present a model and simulations of harvesting of thermal fluctuations occurring in the fuselage of an aircraft during a flight and their transformation into electricity using the thermoelectric effect. The model couples a Thermoelectric Generator with a Phase Change Material as a heat reservoir to boost the generation of electricity. We show how introducing a metallic foam within the PCM enhance the production of electric power, and how it occurs through shorter and higher sprouts of voltage generation.
The study of combustion characteristics of corn stalks and cobs via TGA-DTG-DSC analysis
Authors: Wang X D , Xue J J , Zhu Y J , Liu C R , Hu X Y , Liang H , Dong C Q 
Published: October 2019

Abstract
To fully utilize the corn residuals, the combustion characteristics of corn stalks and corn cobs via TG-DTG-DSC (thermogravimetric-differential thermogravimetric-differential scanning calorimetry) were studied. The TGA, DTG and DSC curves are analysed and the combustible characteristics, burnout characteristics, comprehensive combustion characteristics are calculated to estimate the combustion characteristics of corn stalks and corn cobs. The results show the combustible ability of corn cobs is better than that of corn stalks. The ignition temperature of cobs is lower than that of stalks. The combustion rate of cobs is faster than that of stalks. However, the burnout characteristics of stalks are much better than that of cobs. The burnout temperature and time of stalks is higher and longer than that of cobs. The different combustion characteristic of stalks and cobs result from the difference of composition of stalks and cobs. The NIRS spectra also show the spectra of stalks and cobs are significantly different in the range of 1100-1300nm, where is the information of the C-H stretching vibration. In conclusion, it is better to co-combustion of corn stalks and cobs to improve the combustible and burnout characteristics, which will result in easier ignition and more stable combustion. The results of this study will provide guidance to the better utilization of biomass.