bluuebunny/crossref_metadata_2025_split huggingface dataset:
Current Status And Prospects Of Research On New Urban User-side Energy Interconnection System Planning
Authors: Ye Peng , Zhang Zheng bin , Wang Huan , Guan Duo jiao , Zhang Ming li , Zhang Na 
Published: February 2022

Abstract
Constructing a new-type urban user-level energy interconnection system, comprehensively considering user-side energy characteristics to optimize the “source-network-load” structure, which is conducive to awakening the potential of users to delay load peak shaving, and realizing the local consumption of renewable energy, which is a solution for small towns. An important means to balance supply and demand. Based on the initiative of users to use energy, this paper divides the user energy interconnection system into residential users, industrial and commercial users, and electric vehicle users. First, it outlines the connotation of the energy Internet and the architecture of the user-side energy interconnection system. Secondly, it summarizes the planning model of user energy interconnection system. Subsequently, according to the “source-network-load” structure, the configuration of the user-side energy interconnection system is analyzed from the perspective of planning. Finally, this article briefly prospects and discusses the factors that need to be considered in the future user energy interconnection system planning.
Power system solution based on root matching method in FPGA environments
Authors: Xue Ke , Cao Le , Chen GuoChu 
Published: February 2022

Abstract
Digital electromagnetic transient simulation is an important means to analyze the operation, planning and control of power systems. Numerical integration algorithm is the core of electromagnetic transient simulation analysis. By analyzing the existing electromagnetic transient simulation methods of power systems, it is difficult to solve the numerical oscillation and decoupling problems, and the root matching method is proposed to solve such problems. From the perspectives of basic component modeling methods and basic simulation algorithms, the disadvantages of mainstream algorithms in solving electromagnetic oscillations are analyzed. Combining the calculation and simulation features in FPGA, the three-phase two-level inverter model of the power system built is verified.
User-transformer relation identification based on power balance model and adaptive AFSA
Authors: Song Jiawei , Jiang Yan , Song Xueying , Sheng Zhiqiang , Meng Zibing 
Published: February 2022

Abstract
User-transformer relation identification plays an important role in the correct management of low-voltage area archives and the improvement of line loss. In order to obtain an accurate user-transformer relation identification, this paper proposes a user-transformer relation identification method in the low-voltage area based on power balance model and adaptive artificial fish swarm algorithm(AFSA). This method uses the summation relationship between the total meter of the transformer and the user’s meter/meter box to fit the coefficients of the power balance equation through the AFSA, then we use the coefficients and related statistical values to judge the user-transformer relation. The main innovations are: this paper proposes a power balance model to solve the problem of user-transformer relation identification, which is simpler than previous methods and has strong operability; AFSA is used to fit the regression coefficients of the power balance equation, which has advantages in calculation accuracy and efficiency compared with the traditional least squares method; an improvement strategy of adaptive step length is proposed to make the ability of AFSA to find superior stronger. By selecting real station data for verification, the result shows that the method in this paper can quickly and accurately identify user’s meters/meter boxes with abnormal user-transformer relationship, the method in this paper has high computational efficiency and recognition accuracy without additional labor and hardware costs.
Probability Density Analysis of Wind Storage Output Based on Monte Carlo Simulation
Authors: Hu Haiming , Yan Yan 
Published: February 2022

Abstract
Due to the relatively large fluctuation amplitude of the output power of wind farms, when using energy storage to stabilize the output characteristics of wind power, the impact of the addition of energy storage on the probability density of wind power output needs to be further analyzed. This paper uses Monte Carlo simulation algorithm to analyze the probability density of active power output in consideration of the operating state of wind power and compares the change of the output probability density curve after adding energy storage. According to the output probability density curve obtained by the algorithm, the abscissa of the curve is shifted to the right by one energy storage capacity unit after the addition of energy storage, so that the output probability density curve of the wind storage system can reach the required value by adding energy storage.
Research on Vibration of Mechanical System Based on MATLAB
Authors: Feng Changying , Pang Chen 
Published: February 2022

Abstract
Mechanical vibration is the main factor affecting mechanical performance. This vibration will seriously affect the smoothness of the mechanical system and reduce the service life of mechanical system components. In addition, severe mechanical vibration may also affect the stability of the mechanical system and produce noise. Therefore, studying mechanical vibration and proposing control methods will be a significant task. This paper is mainly based on MATLAB to study the vibration of a typical mechanical system, namely the body and wheel dual-mass system, and obtain its amplitude-frequency characteristics, and focus on the influence of system parameters on the root mean square value of vibration. This research can provide a certain useful reference for reducing vehicle vibration and improving vehicle driving comfort.
Theory and application of gas drilling technology
Authors: Pei Xiangbing , Feng Jianqiu , Jiang Ke , Zhang Tan , Wang Xiaonan 
Published: February 2022

Abstract
Gas drilling began in the 1950s. The drilling process is implemented by injecting a mixture of air and water into the well with an air compressor. Field experiments have gradually proved that air drilling in hard rock can improve the ROP by 2 ∼ 3 times, especially in reservoir protection. In this paper, the gas drilling technology is analyzed and discussed. The test results of gas drilling technology show that the drilling time is reduced and the mechanical ROP is greatly improved. Compared with mud drilling, the mechanical ROP of gas drilling in the same structure and well section is generally increased by 2 ∼ 10 times, the production of oil and gas wells is relatively high and the economic benefit is remarkable.
Optimization of the nozzle structure for the application of fused deposition modeling (FDM)
Authors: Yang Shuran , Xu Zhihao , Huang Chenyang , Yang Qifeng , Huang Hongzhao 
Published: February 2022

Abstract
The principle of Fused Deposition Modeling (FDM) is basically that the micro-nozzle moves along the part in the filling track under the computer using some low viscosity material heated to an appropriate temperature without manual intervention. Even though the FDM technology is very popular, some features remain to be improved. For example, the tube above the nozzle might be so heated that the materials inside might be melted. As a result, the machine lacks enough force to push the materials out of the nozzle. In this work, we decide to solve the problems of those overheated tubes. We redesign two types of nozzles with the help of Ansis, which is simulation software. The first design adds heat sinks around the tube, and the second design adds an insulated pipe to prevent the materials from being melted due to the high temperature. According to our simulations, both methods can effectively prevent the tube from becoming overheated, and the material can be pushed out from the nozzle successfully, which broadens the usage of the FDM technology.
Elasto-plastic constitutive relation of low temperature marine steel EH36
Authors: Zhao Kuangjie , Liu Xianru , Li Jianguang 
Published: February 2022

Abstract
In order to consider the characteristics of materials and the impact of sea ice collision in the calculation of ultimate strength of stiffened plates, based on the study of dynamic constitutive models of sea ice and polar marine steel at low temperature, this paper explores the calculation model of ultimate strength of stiffened plates for hull with collision dents considering the effects of low temperature and strain rate of steel. A constitutive model of EH36 steel considering low temperature effect is proposed, which has practical engineering value. According to the quasi-static tensile test results of EH36 steel at different temperatures, the relation formula of the influence of temperature reduction on the yield strength of EH36 steel was fitted. Based on the test data and Cowper-Symonds model, a constitutive model of EH36 steel considering low temperature effect is proposed, and the constitutive model is applied to the test simulation calculation, which proves that the dynamic constitutive model of EH36 steel has practical engineering value.
Climate-driven trends in agricultural water requirement: an ERA5-based assessment at daily scale over 50 years
Authors: Rolle Matteo , Tamea Stefania , Claps Pierluigi 
Published: February 2022

Abstract
The impact of climate variability on the water requirements of crops is a key issue in a globalized world with unprecedented population and unevenly distributed water resources. Changes of hydro-climatic forcings may have significant impacts on water resources use, considering the possible effects on irrigation requirements and crop water stress. In this work, a comprehensive estimation of crop water requirements over the 1970–2019 period is presented, considering 26 main agricultural products over a 5 arcmin resolution global grid. The assessment is based on a daily-scale hydrological model considering rainfed and irrigated scenarios, driven by hydro-climatic forcings derived from ERA5, the most recent climate reanalysis product within the Climate Change Service of the Copernicus Programme. Results show the heterogeneous impact of climate variability on harvested areas of the world, quantified by water stressed days and irrigation requirement rates. Increases of irrigation requirement rates were found on more than 60% of irrigated lands, especially in regions like South Europe, North-East China, West US, Brazil and Australia, where the mean rate increased more than 100 mm yr−1 from 1970s to 2010s. The daily analysis of water requirements shows that crops require significantly more days of irrigation per season, especially in Europe, Africa and South-East Asia. Statistically significant trends of water stress duration were found over 38% of rainfed croplands, while only 6% of croplands has been affected by negative trends and shorter stress duration, mainly in India, Malaysia, North Europe and coastal regions of central western Africa.
The variational theorem for the scattering length in low dimensions and its applications to universal systems
Authors: Cherny Alexander Yu 
Published: February 2022

Abstract
The variational theorem for the scattering length (Cherny and Shanenko 2000 Phys. Rev. E 62 1646–1659) is extended to one and two dimensions. It is shown that the arising singularities can be treated in terms of generalized functions. The variational theorem is applied to a universal many-body system of spinless bosons. The extended Tan adiabatic sweep theorem is obtained for interacting potentials of arbitrary shape with the variation of the one-particle dispersion. The pair distribution function is calculated at short distances by means of the variation of the potential. The suggested scheme is based on simple quantum mechanics; it is physically transparent and free from any divergence.
Chemical Components, Pollen and Bioactivity of Stingless Honey Bee Kelulut (Heterotrigona itama) Meliponiculture from Samarinda, East Kalimantan
Authors: Saputra S H , Nurlina S 
Published: February 2022

Abstract
The stingless honey bee (Trigona sp) has various types, one of which is Heterotrigona itama. Currently, in East Kalimantan, especially in Samarinda, many kelulut honey is meliponiculture, namely in North Samarinda Sub district in Tanah Merah village, Lubuk sawah village and Gunung Lingai village. Are there differences in the chemical components, pollen and bioactivity of kelulut honey (H. itama) in several villages in Samarinda. The purpose of this study was to obtain information on the chemical components, pollen and bioactivity of kelulut honey (H. itama) meliponiculture from several villages in Samarinda. The research method is taking honey directly from the location of kelulut honey meliponiculture. The honey obtained is analyzed in the laboratory for the parameters of chemical components, pollen and honey bioactivity. The data obtained is processed with average values and presented in tables or graphs. The data obtained is processed with average values and presented in tables or graphs. The results showed that stingless honey bee kelulut (H. itama) had chemical components in the form of flavonoids and coumarins. Pollen found in H. itama from Tanah Merah village came from 8 species, Lubuk Sawah 10 species, Gunung Linagei 7 species, the type of unit is monand, pollen size is medium to very large, pollen forms are oblate spheroidal, prolate spheroidal, subprolate and pollen ornament consists of eschinate, psilate, scabrate and verrucate. Inhibition against DPPH 3 from honey was 68.87% -61.75% and antimicrobial Staphylococcus aureus.19.22 mm-15.78 mm (strong) and Eschercia coli 17.44 mm-22.58 mm (strong-very strong).
New Dogashima Medium as Subculture Medium Improve the Growth of Vanda tricolor Shoots from Embryogenesis
Authors: Ashihah F R , Rineksane I A , Astuti A 
Published: February 2022

Abstract

Vanda tricolor is an orchid endemic to Mount Merapi in Yogyakarta Indonesia. Efforts to propagate Vanda tricolor through in vitro culture have been carried out to restore the Vanda tricolor population that has decreased due to the eruption and human exploitation. The shoots that have been obtained must be transferred to a new medium by subculture. This study aimed to obtain the best medium for growth and enlargement of Vanda tricolor orchid shoot from organogenesis and embryogenesis by in vitro culture. This research is an experimental study conducted in a laboratory using a completely randomized design with a single factor, namely shoot growth from organogenesis and embryogenesis on various subculture medium. The explants used were shoot explants from organogenesis and shoot explants from embryogenesis which were subcultured into Murashige and Skoog Medium, Vacint and Went Medium and New Dogashima Medium without plant growth regulator. 0.2 g/l activated charcoal and 0.5 ml/l Plant Preservative Mixture was added into each medium. Each treatments was repeated 3 times, each replication consist of 3 samples. The results showed that the shoots from embryogenesis subcultured into the New Dogashima Medium without growth regulators was the best treatment for the enlargement of Vanda tricolor orchid.
Ecophysiology Identification and Flower Morphology of Rafflesia arnoldii at Forest Ecosystem of Bengkulu Province
Authors: Samidjo G S , Oktavidiati E , Sunaryadi  
Published: February 2022

Abstract
Rafflesia flower, especially Rafflesia arnoldii, is a rare flower that is the pride and icon of Bengkulu Province. The population is decreasing over time and recently it is found that the size of the flower crown is relatively narrow. Conservation efforts begin with an inventory and identification of ecophysiological conditions and morphological characters, especially in several forest ecosystems in the Bengkulu Province. The target of this research is, in the end, a future conservation model based on cultivation technology. The survey method was used in this study. Data obtained through direct observation of the Bengkulu forest ecosystem habitat and interviews with representatives of the presence of Rafflesia flowers. The data obtained were analyzed descriptively-analytic. The results showed that 9 (nine) R. arnoldii flowers were found in various phases with the conditions attached to their host plant, namely Tetrastigma sp. This flower is found at the coordinate point of 4 ° 26'55 "S, 103 ° 15'14" E in Bungin Tambun III Village, Padang Guci Hulu District, Kaur Regency, Bengkulu Province, and this location is only 12 meters from the water source. Several flower phases were found, namely Copula (6-9 months), Brakta (3-5 months), and Perigon blooming (1-2 weeks) One of the phases of this orange flower has reached the blooming phase with 5 crowns, 53 cm in diameter, the diaphragm is 31 cm wide and 50 cm high. Environmental conditions at the time of flowering include temperatures ranging from 24-25 °C, with humidity (RH) 80-85%.
Application of Agrodeco™ Cultivation of Maize Intercropping with Peanuts in Rainfed Rice Fields
Authors: Setiapermas M N , Nurlalily R 
Published: February 2022

Abstract
Increasing corn production is usually done by increasing the planting area (including intercropping) and applying technology. The technology applied to increase productivity is integrated crop management and the application of climate change adaptation and mitigation. One of the technology components is the management of organic fertilizers with the use of biodecomposers in the area of land to be planted. One of the biodecomposers is Agrodeco™ from the Agricultural Research and Development Agency. Agrodeko is a consortium biodecomposer from Trichoderma fungal strains, N-fixing in the form of non-pathogenic yeast and Candida sp which grows fast and is able to produce enzymes needed to decompose plant tissue. While the varieties grown in a development area can be used composite corn. The activity was carried out in Jeron Village from June to October 2017. Planting area for activities is around 4000 m2. There were 3 (three) treatments applied, namely cropping patterns (monoculture and intercropping), corn varieties (Srikandi Kuning and Provit A) and fertilizer doses (farmer's dose and recommended dose (with Agrodeco™ application)). In monoculture cropping system, yields were not significantly different between Srikandi Kuning and Provit A, but the productivity of Provit A (3.8 tons/ha) was higher than Srikandi Kuning (3.4 tons/ha). In the intercropping system, the productivity of Provit A corn at the farmer dose treatment (1.2 tons/ha) was significantly different from the recommended fertilizer dose treatment (2.2 tons/ha.
Fabrication Rapitest Luster Leaf Color Change-Based for Soil pH Measurement: Comparison Study
Authors: Asriyani N , Mufti N , Zulaikah S , Abadi M T H 
Published: February 2022

Abstract
Agricultural productivity is hindered by low soil fertility. One of the causes is the condition of pH levels on agricultural land. pH measurement can be done using Rapitest Luster Leaf based on discoloration. Rapitest fabrication uses a colorimetric method by mixing reagents and indicators. Rapitest is characterized using XRD, XRF, EDX, and FTIR. Rapitest has been fabricated compared to Rapitest Luster Leaf. Rapitest on soil pH measurement provides color indicator is deep red, orange to yellow, light green, and green. The color indicates when pH is 0-1 the solution is deep red, the pH is about 2-3 the solution is orange to yellow, the pH is about 3-4 the solution is light green, the pH is about 5-7 green. XRD analysis indicates both of Rapitest contain Barium Sulfate (BaSO4). Based on XRF testing, Barium content of 88% and Sulfate of 5.9%. The EDX results showed the rapitest content of fabrication results close to the reference result of Oxygen (O) 61.37 At%, Sulfur (S) 17.91 At%, and Barium (Ba) 20.72 At%. Based on FTIR results in the range of 1190 cm-1 indicate sulfonate. In the range 1055, 983, and 648 cm-1 indicate sulfate ion. In the range 698, 648, 597 cm-1 indicate disulfide. Based on the results of the analysis, Rapitest in this study have similarities to Rapitest Luster Leaf.
Application of Goat Manure Briquettes on Red Chili Cultivation in Coastal Sandy Soil
Authors: Budiyanto G , Mulyono  , Achmad F 
Published: February 2022

AbstractApplication of organic matter could prevent a high infiltration problem commonly found in coastal sandy soil. Due to its slow-release properties, organic matter added to this sandy soil may improve the groundwater retention capacity. This study was aimed to investigate the capacity of goat manure briquettes (GMB) in comparison with goat manure to support the productivity of red chili cultivated in coastal sandy soil. The study was carried out in a completely randomized design consisting of 3 doses of goat manure briquettes (GMB) and goat manure (GM) applied (30, 35, 40 tons/ha) with 12 replications. Each dose was applied to the fertilized soils (400 kg/ha urea + 300 kg/ha SP-36 + 300 kg/ha KCl) then incubated for a week. These treated soils were then used for red chili cultivation. Plant growth and yield were monitored and data collected were statistically analysed using DNMRT with significance level of 5%. GMB application showed insignificant effect towards the chili performance in sandy soil. In contrast, GM application revealed higher plant performance and yield. Application of 40 tons/ha GM exhibited the highest fruit weight compared to other treatments. According to these results, the formulation of GM into briquette might reduce its capacity in supporting plant growth.
Consumer Preferences on Durian Fudge Product from Nine Formulations of Sugar Combination and Durian Flesh
Authors: Awanis  , Lesmayati S , Qomariah R , Anggreany S 
Published: February 2022

AbstractProcessing of durian flesh was an alternative solution to solve the decrease in selling price of durian during the harvest time, to increase the shelf life of durian and to increase added value of durian. Durian fudge is a type of candy made from durian. In order to fit with the consumer preference in terms of colour, aroma, taste and texture, research of durian fudge processing with various formulation was conducted. The purpose of this study was to find a formulation that according to the consumer preference. In this study, 9 formulations of durian fudge were made, then each formulation was assessed by 27 untrained panellist. To determine consumer acceptance, test performed using a preference scale (1-5). The data from the test results were analysed statistically with Kruskal Wallis and continued with Mann Whitney test at the 5% level. The results of study showed that the production yield from these 9 formulations was ranged from 487-603 grams. The results of consumer preferences assessments in terms of colour, aroma, taste and texture of durian fudge showed that all formulation of durian fudge were quite liked by the panellists. The treatment of sugar combination and durian significantly affect consumer preference on the parameters of colour, aroma, taste and texture. Based on the average value of all quality parameters, formulation of fudge durian that most liked by consumer was A2B3 (Sugar combination (S: G) 396:4 g.