bluuebunny/crossref_metadata_2025_split huggingface dataset:
Experimental study on fuselage fuel hose guillotine test of civil aircraft
Authors: Xiao Haibin , Wu Zhibin , Liu Degang 
Published: May 2023

Abstract
The crash-worthiness design of civil transport aircraft fuel systems is significance to improve the safety of the aircraft in the case of a crash. CCAR25.993 (f) requires that “fuel feed line in the fuselage shall be assembled to allow reasonable deformation and tension without fuel leakage”. Fuel system fuselage fuel supply line with the appropriate hose configuration can take the advantage of the ductility of the material, and the guillotine test is accepted by worldwide examiners to validate the deformation and tensile capacity of the fuel hose to keep it from leaking fuel.
Engineering Application Method Of A New Satellite Simulation Test System
Authors: Luo Tao , Jia Yuanmei , Xue Kai , Pan Le , Sun Huamiao , Wang Xianjie 
Published: May 2023

Abstract
This paper studies a new simulation test system, which integrates the satellite management and attitude track control software test system, realizes the test configuration and equipment generalization, improves the system universality and automation capability, effectively saves human resources, and equipment costs, shortens the test cycle, avoids quality problems caused by human uncertainty, and improves the efficiency of software development on the satellite.
Orbit and sequence planning method for space multi-target skimming observation
Authors: Liu Yuhao , Fang Zijin , Zhang Bing 
Published: May 2023

Abstract
Based on the research of space-based multi-target skimming observation, this paper studies the observation sequence and observation orbit path planning of low Earth orbit (LEO) targets with the goal of fuel optimization. Based on the Lambert intersection algorithm and branch and bound algorithm, a two-layer branch and bound multi-target transfer observation model is established. Through the first layer of this model, the optimal observation sequence and the target location when the fuel is optimal are obtained. To obtain the global optimal solution, the target position is expanded spherically and the optimal skimming observation point of the corresponding target is determined by using the second layer of the model, and then the optimal multi-target observation orbit is found. Finally, the simulation results obtained by using the model are analyzed and compared with the Hohmann transfer speed increment to verify the reliability of the simulation results.
Research on Train-to-Train Communication Resource Allocation for Urban Rail Transport
Authors: Zhang Ruofan , Mi Gensuo 
Published: May 2023

Abstract
As communication technology improves and urban rail communication system develops, the new CBTC (Communication-Based Train Control) system built upon train – train(T2T) communication has become the mainstream of future rail transit signaling systems. In the future train-centered CBTC system, Train-to-Ground (T2G Train-to-Ground) mode may coexists with T2T communication mode. To reduce the interference and ensure the reliable transmission of information and system security, a joint channel allocation and power control communication resource distrbution method is proposed, which firstly allocates channels to users by the Hungarian algorithm, and then make use of sparrow search algorithm to coordinates the user’s transmit power. Obtained by simulation results, this suggested strategy not only reduces interferences caused by resource sharing and satisfies the dependability of the system, but also significantly improves the throughput of the system.
Optimization of Fuel Supply Strategy for LNG Dual-fuel Ships
Authors: Li Shuting , Zhang Pengshi , Sun Zhuo 
Published: May 2023

Abstract
Fuel cost is an important part of voyage cost, and fuel replenishment strategy is an important decision affecting the operating cost and benefit of shipping companies. A mixed integer nonlinear programming model of fuel supply for LNG dual-fuel ships is established to expand the research scope of fuel supply in the shipping industry to minimize fuel cost. In this paper, the genetic algorithm is improved, the solving steps are designed, and the validity of the model and the algorithm are verified by example analysis. The results show that as long as the LNG price does not exceed 120% of the LSHFO price, the LNG dual-fuel ship can still reduce the fuel cost during the voyage. The lower the LNG price, the larger the LNG fuel tank capacity and the higher the proportion of fuel cost saved. When the fuel market fluctuates, the model can provide a scientific basis for shipping companies to determine the type of ship fuel, optimize the speed, and select the fuel port and fuel volume.
Runoff prediction based on a VMD-LSTM model considering the decomposition error
Authors: Ma Ya-Rong , Yang Jing , Li Hao , Liao He , Feng Yu-Xin 
Published: May 2023

Abstract
For increasing the forecasting accuracy of runoff, a combined prediction model composed of the variational mode decomposition (VMD) and long short-term memory network (LSTM) is investigated in our manuscript. Firstly, data from the runoff is decomposed into three modal components via the VMD algorithm, for reducing the complexity of the original data. In addition, decomposition error is also been considered in this paper, and the hidden information in the series is extracted. Three subsequences and the decomposition error are handled by the LSTM method, respectively. Superimposing the prediction results, the prediction result of the runoff is thus derived. Experimental analysis is carried out, and a comparison of the VMD-LSTM model and other algorithmic indicates that the model constructed in our manuscript is more valid for predicting the runoff.
Optimal design of electromagnetic interference of LED lamp switching power supply based on TRIZ theory
Authors: Luo Xiang , Ma Lin , Chen Shijie , Lin Xiao , Liang Zhanpeng 
Published: May 2023

Abstract
The innovation method TRIZ is an innovative methodology that can analyze problems and solve them and has been widely used in many fields. In this paper, TRIZ theory is applied to optimize the design of the electromagnetic interference (EMI) problem of a model of LED lamps and lanterns switching power supply. The tools of resource analysis, component analysis, functional analysis, and cause-effect analysis are used to analyze the problem of excessive EMI encountered in the design of LED lamps and lanterns, and the tools of technical contradiction and material field analysis are used to improve the problem of reducing EMI. Two solutions are obtained to improve the problem of high EMI by changing the Power inductor design method of the input voltage and by adding capacitors to form a Π-type filter circuit.
Research on BIM collaborative design for the outdoor integrated pipeline of a rail transit depot
Authors: Wu Honghua , Xu Jiuyong , Jin Yongle , Li Qiang , He Wei , Zhang Panfeng , Zhang Jie , Li Jianan 
Published: May 2023

Abstract
The outdoor integrated pipelines of rail transit depots have many specialties, many interfaces, and complex cross-relationships, which are the key and difficult points of depot design. The traditional outdoor integrated pipeline design method has the disadvantages of a large amount of data calculation, error-prone, and low drawing efficiency. At present, the use of BIM technology for auxiliary design also has difficulties, such as slow modeling speed, inconvenient collaborative design, and low efficiency of 3D conversion of 2D drawings. Based on Revit software, this paper focuses on the specific implementation scheme of BIM collaborative design of outdoor integrated pipelines in depots to solve the appealing problem. Overcame a number of key technologies independently developed, such as depot family library construction, Dynamo visual programming track rapid modeling, and GLS rapid drawing software. Realization of outdoor Comprehensive pipeline rapid modeling, collision optimization, and 2D rapid plotting. And it has been applied in an overhaul and heavy repair depot in the southwest, which has greatly improved the design efficiency and quality of outdoor integrated pipelines. The research result can provide a theoretical reference for the BIM collaborative design of the outdoor integrated pipeline of the depot.
Design of envelope analysis software for LNG unloading arm based on MATLAB App
Authors: Deng Chenhui , Yu Bo 
Published: May 2023

Abstract
According to investigate the current situation of the envelope of LNG unloading arm, this paper in view of the relationship between the structure and the envelope of LNG unloading arm, a complete set of calculation program is designed by using the app designer of MATLAB which can automatically generate the envelope according to the hydrological conditions. The program can be used to guide the emergency disengagement process of the unloading arm in case it can work safely on the LNG terminal in the actual project. This paper provides a design basis for promoting the domestic development of LNG unloading arm.
Study on Student Attendance System Based on Face Recognition
Authors: Chen Xuexiao 
Published: May 2023

Abstract
Student attendance is not only an important indicator for the school to inspect students’ achievements, but also an objective evaluation of teachers’ teaching quality. In the system, we use PyCharm as the development platform, design the system interface through QT Designer (QT5), use PyQt5 library to write the function of interface controls, use MySQL as the database, and use OpenCV face recognition algorithm to recognize, thus realizing an attendance system based on face recognition. The system is divided into two parts: attendance and face recognition. Through the test, the number and quality of members can be monitored in real-time. The traditional attendance method of manual statistical management is abandoned, and the method in this paper provides a scientific basis for the implementation of the campus attendance system.
Multi-scale attention mechanism network for Nonintrusive load decomposition
Authors: Tang Weidong , Zhang Hong , Zhang Xiaodong , Zhuang Wei 
Published: May 2023

Abstract
Nonintrusive load decomposition is an important prerequisite to realize intelligent power monitoring and a key application of the smart grid. The existing algorithms cannot achieve the decomposition effect with high accuracy and have poor performance in low-frequency loads. To solve these problems, a method based on a multi-scale attention mechanism network is proposed. First, construct the hole residual attention module to extract the deep features and help the network learn the important features of high peak areas and low-frequency electrical appliances in the time series data. Then, the multi-scale fusion module is proposed to fuse the characteristic information after the convolution operation of different scales. Finally, the decomposed active power values of multiple target electrical appliances are output through the full connection layer. The proposed work can decompose the load characteristics of each electrical appliance in the house by the nonintrusive method. The experimental results on the dataset indicate that this work can reduce the decomposition error and has excellent load decomposition capability compared with the existing methods.
Cross-Camera Multi-Object Tracking based on Person Re-Identification and Spatial-Temporal Constraints
Authors: Li Jiayue , YanPiao  
Published: May 2023

Abstract
In order to reduce the influence of occlusion on the overall feature representation of tracks and improve the accuracy of track correlation between cameras, this paper proposes a cross camera multi-target tracking method based on person appearance and spatial-temporal constraints: a new cross-camera multi-object tracking framework is constructed. Then the person spatial-temporal probability model is established. Finally, the spatial-temporal probability model and the person appearance similarity are jointly measured and the person trajectory correlation under cross-camera is completed by using data correlation; Comparative experiments on the dataset proved that the method is effective.
Research on UWB indoor 3D positioning algorithm based on the least squares method
Authors: Li Chen , Li Shanhong , Cao Pingguo , Song Quanjun 
Published: May 2023

Abstract
With the increased use of rescue robots in indoor scenarios, the requirements for indoor location services are becoming more stringent. Traditional GPS positioning cannot provide accurate location information indoors, while ultra-wideband (UWB) has been widely used for indoor positioning due to its high accuracy and penetrating power. When solving 3D positioning coordinates using UWB least squares in line-of-sight situations, the positioning accuracy is easily affected by the layout height of the base station. In this paper, we first improve the positioning algorithm and then find a better way of base station layout in the actual positioning environment to improve the tag positioning accuracy. The algorithm improvement is based on the following ideas: firstly, the initial positioning results of the tag are obtained using UWB least squares and spatial geometric relations, and the 3D coordinates of the tag are solved using Gauss-Newton iterative method, and finally combined with the Kalman filter for optimization. The base stations are laid out in such a way that adjacent base stations are not at the same horizontal height and relative base stations are at the same horizontal height.
Growth response and yield of potato plant with applications of rhizobacteria and mycorrhizal
Authors: Warnita  , Yanti Y , Suwinda R 
Published: May 2023

Abstract
The potato plant is a primary horticultural crop that can be used in place of food diversification. The study’s goal is to find the best interaction between rhizobacteria and mycorrhizal on the growth and yield of the potato plant. This study was conducted at the Andalas University, Padang Faculty of Agriculture’s Microbiology and Plant Physiology Laboratories and experimental garden Institute Assessment and Agricultural Technology in Sukarami Solok, from July to December 2018. A 2-factor factorial design with replication and a fully randomized design was employed CRD. The type of rhizobacteria is the first factor: no Rhizobacteria, RZ.1.L2.3, RZ.3.L2.1, RZ.3.L2.2, RZ.1.L2.3, and the second factor is Multispora, Acaulospora, Glomus SP2, and Sclerocystis. Each treatment was replicated three times, consisting of 60 experimental units. The data were analyzed using the STAR application whit a 5% F test, and if significantly different, followed by a 5% HSD test. The outcome demonstrated an interaction between rhizobacteria and mycorrhizal on the fresh weight of the tuber.
The effects of several concentrations of BAP and source of explants to gambier shoot induction (Uncaria gambier (Hunter) Roxb)
Authors: Zainal A , Anwar A , Gustian  , Fitriawati  , Yunita R 
Published: May 2023

Abstract
Gambir is a type of plantation plant that has many benefits. Gambir extract can be used for the food, cosmetic, pharmaceutical, and leather tanning industries. However, the availability of gambier has decreased in production. Hence, information and technology for propagating Gambir seeds in vitro is needed. The growth of plant explants can be impacted by the application of growth regulators and explant sources in-vitro. This study’s purpose was to ascertain the connection between BAP concentration and explant sources concerning the development of gambier shoots. In addition, it is also to obtain of BAP and the best source of explants for the induction of the gambier shoots. In this study, a Factorial Completely Randomized Design (CRD) with 6 treatments that were each repeated five times was used. There are two levels of explant source and three levels of BAP concentration, the first of which is the concentration of BAP (2 mg/l, 4 mg/l, and 6 mg/l) (the first node and the third node from the shoot). The findings demonstrated that, in general, 100% of shoots could form when BAP and explant sources were concentrated. The concentration of BAP and the origin of the explants significantly influenced the emergence time of the shoots, with the quickest time of budding occurring after 3.8 days at a concentration of 2 mg/l BAP at the third node. 6 mg/l BAP was the optimal treatment for increasing the number of gambier leaves and shoots.
The growth of groundcherry (Physalis angulata L.) under low salt treatment
Authors: Sholehah D N , Hariyanto S , Purnobasuki H 
Published: May 2023

Abstract
The development of crop cultivation technologies is required to augment crop productivity. It is critical to feed the expanding population in the world. This study aims to characterize the growth of groundcherry (Physalis angulata L.) under low salinity. The study was carried out in Bangkalan, a district on Madura Island. The treatments consisted of the application of 0 mM salinity concentration (A1) and the application of 20 mM salinity concentration in the vegetative stage (A2), generative stage (A3), and during cultivation (A4). The study was designed using eight replication in a randomized block design. Each replication comprised three plants. The root length, leaf number, height of the plant, stem diameter, fruit number, and fresh and dry weights, were measured to determine growth. The study result showed that low salinity affected the leaves number, fruit number, and dry weight. The application of 20 mM salinity concentration at the generative stage (A3) and during cultivation (A4) gave the highest growth of groundcherry.
Impact of rice husk biochar date on the growth and production of edamame (Glycine max L. Merrill) in Ultisol
Authors: Marwiansah R , Ardi  , Warnita W 
Published: May 2023

Abstract
Edamame is one of the food crops that are in great demand by the public. Limited fertile land causes edamame cultivation to be expanded by using marginal land. Therefore, it is necessary to improve soil quality by using biochar rice husk biochar can be used as a soil enhancer which has a positive effect on soil properties. This study aims to obtain the best dose of biochar in edamame cultivation on Ultisol. This research was carried out from February to May 2022 in the field and in the Plant Physiology Laboratory, Faculty of Agriculture, Andalas University. This study consisted of 6 treatments with 4 replications arranged according to a Completely Randomized Design (CRD). The treatment was biochar, namely 0 tons/ha, 5 tons/ha, 10 tons/ha, 15 tons/ha, 20 tons/ha and 25 tons/ha. The data obtained from the observations were analyzed statistically with the F test at a 5% significance level. If it is significantly different, then further test is carried out Duncan’s New Multiple Range Test (DNMRT) further test at a 5% significance level. The results showed that the best dose of 20 tons/ha of rice husk biochar on relative growth rate, net assimilation rate and root crown ratio. but had no effect to plant height, the number of pods per plant and weight of 100 seeds.
Assessing soil organic carbon stock under different land-uses in Koto XI Tarusan District, West Sumatra
Authors: Bustamar A , Juniarti  , Emalinda O , Gusnidar  , Fiantis D 
Published: May 2023

Abstract
Organic carbon in soil can be utilized to assess soil quality and aid to climate change mitigation. Soil organic carbon stock assessment in West Sumatra is still limited. This research focused on soil organic carbon stock distribution in various land-uses in Duku, Koto XI Tarusan, Pesisir Selatan Regency. Research area included secondary forest, scrubland, paddy field, and dryland agriculture. Soil samples were obtained by stratified sampling. Samples were taken at depths of 0-30 and 30-60 cm from each land-use type with the same slope and soil type. A soil unit polygon was randomly selected for sampling. 21 samples were collected and analyzed for bulk density, texture, soil respiration, total nitrogen content, and organic carbon. Secondary forest had the highest soil organic carbon storage (128.82 - 294.09 tons per hectare), followed by paddy fields (16.99 - 227.14 tons per hectare), dryland agriculture (10.40 - 65.43 tons per hectare), and scrubland (13.39 - 53.19 tons per hectare). Nitrogen content was higher in secondary forest>paddy soil>scrubland>dry land. Bulk density was found to be higher in scrubland than in dry land, paddy soils, and secondary forest. Soil pH was greater in paddy soil>scrubland>dryland>forest.
Diversity of Hymenoptera parasitoid on oil palm (Elaeis guineensis Jacq.) plantations in Dharmasraya District, West Sumatra Province
Authors: Ikhsan Z , Suhendra D , Hidrayani  
Published: May 2023

Abstract
Oil palm farmers in Dharmasraya District always strive to increase oil palm production and productivity. The biotic factors can affect the presence of Hymenoptera insects. Most of the Hymenoptera insects are parasites. The research aimed to study the diversity of Hymenoptera parasitoids in oil palm plantations in young oil palm plantations (2-3 years old) and older oil palms (5-20 years old) in Dharmasraya District. Sample points were determined using the transect line method on the land. Sampling was carried out using three traps: 1) yellow pan traps, 2) malaise traps, and 3) Sweep net. The analysis was carried out by calculating the Shannon-Wiener diversity index (H’), the Margalef species richness index (D), the Pielou species evenness index(J), the Jaccard similarity index (Is), and the estimated species richness of Hymenoptera parasitoid. Hymenoptera parasitoids found at the research sites were 1,267 individuals consisting of 23 families and 142 morphospecies. Two young oil palm plantations have a higher diversity of Hymenoptera parasitoids (4.15; 4.24) than older oil palm plantations (3.51; 3.86). The Braconidae, Ichneumonidae, and Scelionidae families dominated the abundance of Hymenoptera parasitoids. Young oil palm plantations have a higher diversity of Hymenoptera parasitoids than older oil palm plantations.
Detection of pathogens to test seed health of some food crops in storage
Authors: Suhendar M A , Koswanudin D , Hidayatun N , Diantina S , Manzila I , Try Zulchi P H , Wawan  
Published: May 2023

Abstract
The health condition of the seed, which is defined by the presence or absence of seed-borne microbes like fungi, bacteria, nematodes, or viruses, is one aspect that affects seed quality. The purpose of this study is to assess the health of some food crop seeds by looking for fungus and bacteria. The Pathogen Detection Laboratory, Division of Management of Genetic Resources (ICABIOGRAD), conducted this investigation in 2019. The Gen Bank collection and rejuvenation were the sources of the tested seeds. The use of moist blotter and agar procedures allowed for the detection of fungi and bacteria. 100 accessions of each of the following: rice, maize, soybeans, peanuts, sorghum, and cowpea had their seed health evaluated. Under a microscope, pathogens are observed growing, and their pathogenic properties are identified using the relevant literature. According to the findings, 12 maize accessions had fungal infections and 8 had bacterial infections. In peanuts, fungus and bacteria were found in 11 and 14 accessions, respectively. As opposed to 16 accessions of sorghum being infected with fungi and 18 accessions being infected with bacteria, nine accessions of soybeans had fungi and eleven accessions had bacteria. 18 accessions of the rice commodity had fungal infections, while 15 had bacterial infections. A total of 26 cowpea accessions had fungal infections, while 23 had bacterial infections. Even with relatively low infection rates (0–10%), fungus and bacterial infections on stored seeds are always present, with the exception of cowpea.