bluuebunny/crossref_metadata_2025_split huggingface dataset:
Introducing genetically improved Melaleuca cajuputi subsp cajuputi to increase farmers’s welfare: a success story in Papua
Authors: Kartikawati N K , Rimbawanto A , Prastyono  , Sumardi  
Published: April 2020

Abstract
Cajuput tree is native to Maluku and produce 1,8 cineole based essential oil. Since 1995, the Centre of Biotechnology and Tree Improvement has implemented a genetic improvement program of cajuput aiming to increase oil yield and oil content. The program has successfully produced superior seeds with the yield of 2%. In early 2016, a small scale pilot plantation of cajuput was established in 5 ha community land di Kampung Rimbajaya Distrik Biak Timur Kabupaten Biak, Papua. Leaf distillation started at the end of 2017 using a simple distillation unit. Previously, the local farmers were woodcutters and shifting cultivators. After the establishment of cajuput plantation, they became permanent farmers and cajuput oil refiners. Leaf distillation of genetically improved trees produced oil yield of 1.3%, a significant improvement from the average of 0.6 – 0.8% yield of unimproved trees. This 5 ha plantation of 2500 trees/ha potentially produce 400 kg/year. Some of the cajuput oil is sold in a local market in 8ml bottle. This cajuput oil production scheme has increased the farmers welfare. Furthermore, the success story of Kovarwis farmers inspired other farmers surrounding Rimbajaya to develop similar plantation. When this small-scale plantation is replicated in other parts of Indonesia, cajuput oil production will increase and Indonesia may one day become self-sufficient in cajuput oil. An agreement with cajuput packaging company is being establish to ensure that the oil produce by farmers will be purchased by the company and thus ensuring steady supply of good quality oil.
Forest conflict mitigation through coffee-based agroforestry provide secure habitat for Javan Slow Lorise in a lowland fragmented forest in Central Java, Indonesia
Authors: Sodik M , Pudyatmoko S , Yuwono P S H , Imron M A 
Published: April 2020

Abstract
Java Island has experienced numbers of forest conflict. Consequently, it may contribute to the disturbance of the sustainability of its forest biodiversity and increasing number of local poverty surrounding the forest area. Agroforestry system is known as one of the strategies to mitigate the forest conflict. The system helps the farmers to increase agricultural production, social life, and ecological stability. Local community in Kemuning forest had been implementing coffee-based agroforestry system for a long time, as part of their main income. This system allowed farmers to acces the forest through an intensive interaction between locals and its forest environment. This study aimed to understand the forest conflict mitigation through agroforestry practices in Kemuning forest better, which allegedly become a key factor for the sustainability of the presence of Javan slow lorise. This study builds on the assumption that people frame conflicts on Kemuning forest according to their experiences, expectations, objectives and interests at a specific moment. The basis for our analytical framework is found in theories on framing. In doing so, the study uses the framing analysis theory to identify framing of the conflict by different involved stakeholders. Data were collected in 2018 - 2019 through several techniques such as in depth interview, field observation, and study literatures. Collected data were analyzed descriptively by discussing each finding with framing analysis theory. Findings revealed that conflict in Kemuning forest were triggered by three main issue/problem frames identified as the root causes of the conflicts which are forest security, unfollow the signed contract, and an unequal benefit sharing from the coffee-based agroforestry sector. Other frames: identity, characterization, and conflict management frames were constructed in such a way to reinforce the issue/problem frames. This study also found that related to Javan slow lorise habitat, this coffee-based agroforestry system is the appropriate land use management that provide secure habitat for the sustainability of the presence of the animal within Kemuning forest.
Silvopasture based on Sengon (SBS) in the southern of Merapi Volcano and the development opportunities
Authors: Dewi R A , Suryanto P , Suwignyo B , Adriana  , Triyogo A 
Published: April 2020

Abstract
Silvopasture is an important pillar for people in the southern part of Merapi Volcano. Silvopasture provides forage and also supports ecological recovery after the eruption. This research was aimed to determine the composition of stands, forage productivity and quality, and the opportunities of silvopasture development. Data were collected by a purposive method that divided the land into 4 categories based on the age of sengon stands: 2 years, 3 years, 4 years, and 5 years with 4 samples were taken from each category. Measurement of stands were collected using 20m × 20m plots. Inside the stands plot there were 5 plots of 1m × 1m ordered diagonally to collect forage samples. The variables observed include the species and the number of stands and forage, forage’s productivity (wet weight), also forage’s quality (organic matter, crude protein, and crude fiber). Data analysis used the Importance Value Index (IVI), Diversity Index (H’), and Analysis of Variance (ANOVA). The result showed that the land composed by timber stands (sengon, mahogany, mindi, mangium, and jabon), fruit stands (durian, guava, dersono guava, jengkol, melinjo, jackfruit, kokosan, and avocado), forage stands (gamal), and other stands (waru gunung). The observed forage were Panicum maximum, Cyperus rotundus, and Imperata cylindrica. Panicum maximum on SBS of 4 years old (shade intensity 92,93%) has the best productivity (0,077 ton/ha/year wet weight) and quality (10% crude protein, 20,6% crude fiber, and 83,4% organic matter). Silvopasture can be developed by intensifying the land space for stands and forage as well as increasing the land owner’s knowledge about silvopasture.
Buoy observation data verification and application
Authors: Xu Shanshan , Luo Jingxin , Wang Aimei , Li Cheng , Wu Shuangquan 
Published: April 2020

Abstract
The buoy automatic observation is greatly influenced by the marine environment. The quality of buoy observation data needs to be tested before it is applied. In this paper, buoy observation data is verified with the ocean station and ocean section observation data, and the reliability of buoy observation is analyzed. On this basis, the hydrometeorological condition in the central Bohai Sea is analyzed for surface water temperature, surface salinity, sea surface air temperature and sea surface pressure. The results show: The reliability and continuity of buoy observation of sea surface water temperature, sea surface air temperature and sea surface pressure are high; the reliability of sea surface salinity, average wind speed, average wind direction, significant wave height, significant wave period, average wave height and average wave period are low. The hydrometeorological condition in the central Bohai Sea analyzed by buoy observation data is basically consistent with the existing research conclusions. The lowest water temperature in the central Bohai Sea occurs in February.
Study on the actual operation characteristics of fluidized bed heat exchanger in a supercritical CFB boiler
Authors: Wang Hu , Xin Shengwei , Zhang Peng , Hu Changhua , Lu Xiaofeng , Lei Xiujian , Chen Jianbin , Kuang Wei , Wu Wanzhu , Gu Congyang , Xie Guowei 
Published: April 2020

Abstract
On the basis of measurements on the fluidized bed heat exchanger (FBHE) in a 600MW supercritical CFB boiler fueled by lean coal under different boiler load, the actual operation characteristics of the FBHEs, such as post-combustion characteristics and heat absorption shares in the FBHE were obtained in this paper, as well as ash flow rate through the FBHE. The measured and calculated results indicate that the post-combustion phenomenon exists in the FBHEs of the boiler fueled by lean coal. As steam parameter raises from subcritical to supercritical parameter, heat absorption share of heating surface in the FBHEs are quite different from each other regardless of boiler load. Moreover, as the boiler load decreases, ash flow rate through FBHE arranging reheater is almost the same, while ash flow rate through FBHE arranging superheater changes significantly. These results can provide referential materials for the optimized design and operation of the FBHE in large-scale CFB boilers.
Research on integrative multi-media modelling and simulation method for tight formation horizontal well development
Authors: Dong Jiaxin , Shi Wen , Yang Fan , Liu Lifeng 
Published: April 2020

Abstract
Tight formations usually have large area of coverage. There is large areal heterogeneity for reservoir petrophysics, rock facies, formation thickness, physical properties and oil saturations, in different reservoir blocks, in area between different wells, and also in different segments of a single well. Tight reservoirs have different scales of natural fracture development. Hydraulic fracturing also forms different scales of complex hydraulic fracture network, which has large macroscopic heterogeneity with prominent multi-scale features. Unconventional tight reservoirs consist of different scales of porous media from nano-sized to nano-micron to micron-sized. There is large difference for compositions and quantity distributions in pore spaces with different scales. Different scales of pores present discrete discontinuous distribution in space, with large heterogeneity in spatial distribution. There is large difference for geometric parameters and physical properties in different scales of porous media. Different scales of pores present large microscopic heterogeneity and multiple porous media features. All of these features make conventional reservoir modelling and numerical simulation theory and technology not applicable in this scenario. In this paper, a new multimedia modelling and simulation method for volume fracturing of horizontal wells in tight reservoirs is introduced in detail by using the unconventional reservoir modelling software Untog, taking a single well as an example.
Design and simulation optimization of cold storage and air conditioning system in LNG powered carrier by using cold energy of LNG based on HYSYS
Authors: Li Boyang , Yang Qianqian , Zhang Rui , Yang Sangyu 
Published: April 2020

Abstract
In order to solve the problem that the LNG (Liquefied Natural Gas) cold energy in LNG powered carrier is not used sufficiently, a set of system is designed. This cold storage and air conditioning system is used in LNG powered carrier. At the same time, the refrigerant required by the system is selected and simulate the process of the system by HYSYS. This paper describes the specific process and gives the simulation parameters of each node. The simulation results meet the expected requirements and accord with the actual situation. The main purpose of this system is to reduce energy consumption by using LNG cold energy as a cold source of cold storage and room air conditioning.
Investigation of instability on loop heat pipe with flat evaporator
Authors: Gai Dongxing , Yin Yang , Chen Chen 
Published: April 2020

Abstract
Loop heat pipes (LHPs) are heat transfer devices whose operating principle are based on the evaporation and condensation of a working fluid, using the capillary pumping forces to ensure the fluid circulation. A series of tests have been carried out with a loop heat pipe (LHP) with flat evaporator and a fin-and-tube type condenser. At some low heat loads, temperature oscillations were observed throughout the loop. Detailed study was conducted on the characteristics of temperature oscillation of the flat LHP at various heat loads. It is expected that the compensation chamber is the most critical component of the LHP; its hydrodynamic state dictates the extent and the characteristics of the temperature oscillations. The heat leakage from the evaporator to the compensation chamber, the heat loss to ambient and the subcooled liquid temperature dictate the vapor condition inside the compensation chamber, and the rate of vapor growth or dissipation dictated the nature of the temperature oscillation. The effects of different working fluid to the temperature oscillations were studied in detail.
Energy flow analysis of the multi-energy energy router
Authors: Li Shuo , Li Zichen , Li Pengfei , Zhang Yanchi , Xie Da 
Published: April 2020

Abstract
Energy routers have become a hot topic in recent years as a key link to realize the wide interconnection of multiple energy sources in the energy Internet. Firstly, this paper analyzed the operation mode of the multi-energy energy router and summarized its typical structure. Then based on the interaction between the energy router and the grid, the energy flow was analyzed from the energy router to the grid and the grid to the energy router. Finally, the energy interaction of the above two aspects was simulated, and the conclusion that the multi-energy energy router can realize various energy interactions in the energy Internet is obtained.
A calculation method of user response potential on demand side response in integrated energy system
Authors: Han Hanxian , Luo Jinman , Ye Ruijing , Liang Haobo , Zhang Zhilu , Deng Yingqi 
Published: April 2020

Abstract
The current Integrated Demand Response (IDR) strategies cannot accurately evaluate the user’s maximum response which ignore the user terminal equipment response model. At the same time, the optimization target of the current IDR strategies is mostly electric energy, and other energy response requirements such as natural gas are not considered. This paper establishes an IDR strategy model based on energy models for different equipment terminals of residential users. And calculate the theoretical maximum response potential value of different users according to the response strategy formulated by different energy response requirements with the GA-SQP hybrid algorithm. The example analyses the user response potential in typical scenarios and time periods. The results verify the effectiveness and feasibility of the proposed method.
Research and analysis of energy internet from the perspective of NSFC
Authors: Hu Congchuan , Wang Yongzhen , Liu Yuxuan , Zhang Jing , Li Yongtian 
Published: April 2020

Abstract
Energy Internet (EI) is an emerging discipline that integrates cooling, heating, power and gas in physical, information and value flows, so it has a very distinctive interdisciplinary feature. The current situation of EI needs to be sorted out and summarized in time, so as to provide a reference for its future development. To some extent, the National Natural Science Foundation of China (NSFC) reflects the research focus and trend of EI in China. Therefore, this paper tries to analyse the programs of EI from the perspective of NSFC, the results revealed that 1) EI becomes a research hot point of combined cooling, heating and power instead of electricity only after micro grid and smart grid. Also, this is one of the reasons that researches on EI mostly focus on the electrical science and engineering currently; 2) One of the purposes for EI is to solve the problem of abandoning wind and light energy;3) The number of NSFC supporting programs involving the topics of EI, multi-energy complementarity and integrated energy system accounts for 43% of 124 EI-related funds totally; 4) The distribution of the NSFC supporting programs about EI reveals the crossing and integration of multiple disciplines, such as electronics and information systems, computer science, automation, management science and engineering, mathematics.
Numerical simulation and analysis of enhanced heat transfer in corrugated tube heat exchanger
Authors: Jiang Jingzhi , Bo Lin , Chen Zhengjia , Cui Haiting , Zhu Hairong 
Published: April 2020

Abstract
At present, in many fields such as petrochemical industry, in order to make better use of heat energy and reduce energy consumption in the process of equipment operation, heat transfer enhancement of heat exchange equipment has attracted more and more attention. Corrugated tube has many advantages compared with other smooth tubes, which are enhancing heat transfer, strong anti-fouling ability and easy to clean. In this paper, a heat exchanger with corrugated tube is studied. The geometry is meshed with the software GAMBIT. It is used with Fluent software and the initial and boundary conditions are set. Heat transfer performance between smooth tube and corrugated tube at the same inner wall temperature and velocity. Then, the influence from inlet velocity on heat transfer performance is investigated. The variation of temperature field, pressure field and velocity field in corrugated tube heat exchanger with different inlet velocity is discussed. The results show that the enhanced heat transfer effect of corrugated tube is much better than that of smooth tubes. At three different inlet velocities (0.5m/s, 1m/s, 3m/s), the enhanced heat transfer effects of the corrugated tube heat exchanger are different. With the increase of inlet velocity, the heat transfer effects of corrugated tube heat exchanger are enhanced, but the extent of enhancement decreases. In the range of this paper, the optimal inlet velocity is 0.5m/s in order to obtain the more heat transfer quantity and lower operation cost.
Experimental research on the indoor thermal environment of the office buildings with solar energy heating in Xinjiang, China
Authors: Xu Xin , Li Jie , Jiang Shuguang , Wu Mengyun , Dai Jin , Qi Dianwei 
Published: April 2020

Abstract
In order to study the indoor thermal environment of solar heating of office buildings in Xinjiang, A rural office building in Shihezi was selected in this paper as the research object. Indoor temperature and relative humidity were monitored in field testing during the winter heating period. 4363 sets of effective data were collected in the experimental research. PMV-PDD was calculated to analyse its indoor thermal comfort by a program. The results show that the indoor thermal comfort of the room without a heat source was always not satisfied. Furthermore, the average indoor PMV of the room with coal-fired heating was -1.6 and that with solar heating was -0.5. At the same time, the room with solar energy heating can control the fluctuation margin of indoor temperature within a certain range, especially to the temperature fluctuations during the working time. Therefore, the technology of solar heating was certified as a suitable method to maintain indoor comfort in Xinjiang.
Optimal planning of multiple energy flows for microgrid with renewable energy sources
Authors: Wang Xi , Zhang Quanming , Ren Zhichao , Chen Lipin , Li Huaqiang , Yan Mengyang 
Published: April 2020

Abstract
With the gradual depletion of fossil energy and the increasingly serious environmental pollution problems, the combined cooling heating and power (CCHP) microgrid with renewable energy sources which with high energy efficiency, less pollution emissions and flexible operation control have become research hotspots. In this paper, the optimal planning of CCHP microgrid with renewable energy sources is studied, and the mathematical model of optimal configuration of the system is established with the minimum total cost as the objective function, then the separated production (SP) system is used as a reference to compare the optimal configuration results of the CCHP microgrid system under the two modes of following the thermal load (FTL) and following the electric load (FEL). After that, the optimization configuration results of the two schemes of whether the CCHP microgrid system is equipped with the thermal storage tank (TST) in the same operating mode are compared. The simulation result shows that the system with TST under the FEL mode is more economical, energy-saving and environmentally friendly. Finally, the effects of natural gas price and electricity price on the optimal configuration results of the system in two operating modes are studied.
Fault diagnosis of PV array using adaptive network based fuzzy inference system
Authors: Gan Yutao , Chen Zhicong , Wu Lijun , Cheng Shuying , Lin Peijie 
Published: April 2020

Abstract
A new online intelligent fault diagnosis method is proposed for PV arrays in this paper to improve the reliability and efficiency of PV systems. Firstly, a new seven-dimensional fault feature vector is extracted from the raw data of dynamic operating points of PV arrays including operating voltage, current, irradiance and temperature. Secondly, an optimized adaptive network based fuzzy inference system (ANFIS) is proposed as the fault diagnosis model. Lastly, the feasibility and superiority of the proposed ANFIS based fault diagnosis model are tested by both Simulink based simulation and real fault experiments on a laboratory PV system. Experimental results validate that the proposed ANFIS based method achieves a high performance and is superior to conventional back-propagation neural network (BPNN) based methods. The overall accuracy of the ANFIS based fault diagnosis model on the simulation and experimental dataset is 99.9% and over 97% respectively.
Forecasting the installed wind capacity using a new information priority accumulated nonlinear grey Bernoulli model
Authors: Xiang Xiwang , Liu Liang , Cao Jiahao , Zhang Peng 
Published: April 2020

Abstract
Wind energy is an important renewable and clean energy, and the accurate realization of the prediction of the installed wind capacity is urgent and should not be delayed. This paper proposes a novel new information priority accumulated nonlinear grey Bernoulli model and applies it to forecast the installed wind capacity in Europe and South America. The nonlinear parameters of the proposed model are optimized by the Grasshopper Optimization Algorithm. In the application case, the model our proposed has a more satisfactory predictive performance by comparing it with other three classical models.
Study on electromagnetic environment of ±800 kV UHV DC and 1000 kV UHV AC parallel transmission lines
Authors: Wang Guangzhou , Yao Degui , Zhang Songyang , Wang Donghui , Wang Leilei , Guo Xing , Yang Fan 
Published: April 2020

Abstract
Aiming at the typical AC/DC parallel transmission lines which have been put into operation in China, the electromagnetic environment of parallel transmission lines is monitored and the interaction between AC and DC electromagnetic environment is analyzed. Monitoring results show that: The electromagnetic environment of UHV AC/DC parallel transmission lines meets the corresponding national standard limits. UHV DC transmission line has little influence on power frequency electromagnetic field, which is mainly affected by distance and wire height to ground. UHV AC transmission line may have a certain impact on DC composite field strength, and wind speed will have a greater impact on DC composite field strength.
Power unit load system modelling research based on BP neural network
Authors: Si Ruicai , Wang Songhan , Liu Xiwen , Li Jia , Zhou Chi , Li Baoju 
Published: April 2020

Abstract
A thermal power unit is a very complex non-linear multi-variable control object. It has the characteristics of strong coupling, large inertia, large delay and time-varying parameters. The traditional mathematical model is difficult to describe the non-linear characteristics among the parameters of the unit, and it is difficult to meet the control requirements of unit load, main steam pressure and so on. Based on the more advanced BP neural network modeling method, the mathematical model of the operation of 600MW thermal power unit under low, medium and high load is established by using the actual operation data on site. The method used is novel, and the simulation analysis shows that the model also has a strong engineering practice.