bluuebunny/crossref_metadata_2025_split huggingface dataset:
Product Information Units Modeling Oriented to Digital Twin
Authors: Bao Qiangwei , Zhao Gang , Yu Yong , Dai Sheng 
Published: April 2021

Abstract
To solve the problem of expression of multi-source heterogeneous data of product development and manufacture, a new concept of product information units (IUs) and a new method of product data modeling based on IUs are proposed. Firstly, the definition and composition of IUs are analysed according to the formation time and description object. Secondly, the geometric elements and their topological relationships of products are regarded as bases, depending on which the association methods of various IUs are expounded. Meanwhile, the role of IUs in the construction of digital twin models is pointed out. Finally, the ontology representation of the IUs is realized to prove the feasibility of the method proposed.
The Kozai-Lidov Mechanism in Binary Star Systems and the Stabilizing Effect of Binary Stars
Authors: Chen Zhifeng 
Published: April 2021

Abstract
This study used Python simulations to compare the orbits of planets in single-planet binary systems and two-planet binary systems with equivalent single star systems to examine the differences of the Kozai-Lidov mechanism in three-body single star systems and four-body binary star systems. The Python program simulated the forces between the stars and the planets, and produced inclination graphs and orbital diagrams. In the single-planet scenario, no Kozai-Lidov effect is observed as the additional star did not affect the planet’s inclination, but the orbit is considerably rotated. In the two-planet scenario, the Kozai-Lidov oscillation period decreases from 650 years to 370 years, and the maximum inclination decreases from 0.690 radians to 0.280 radians, indicating that the binary star system acts against the Kozai-Lidov Mechanism. Additional trials with modified initial configurations of the two-planet binary star system confirm the universality of the suppressive effect in varying initial conditions in binary star systems.
Suitability Analysis and Evaluation of GIMMS NDVI3g Product in Plateau Region
Authors: Zhao Jianyun , Ding Yuanyuan , Yang Jing 
Published: April 2021

Abstract
Quantitative Remote Sensing product have many challenges and uncertainties used in Tibet plateau, GIMMS NDVI3g is the longest NDVI time series products reflected the vegetation growing and changing at present. This paper takes Qinghai plateau as example, and using multi-source remote sensing data including SPOT, MODIS and Landsat to analyze its suitability and evaluate its accuracy. The results indicate that the value of GIMMS NDVI3g is bigger than others dataset, and there has no significant difference between the datasets according to the root mean square error, and the correlation coefficients are greater than 0.95. The vegetation phenology and changing characteristic reflected by the datasets is in line with each other. There have strong correlationship between NDVI3g and Landsat NDVI, and the root mean square error is 0.055, and the deviation is in accord with the Gaussian normal distribution. So NDVI3g dataset has favorable suitability and reliable accuracy used in vegetation change detection of plateau region.
Establishing a Cyclone Gyro Model to Study the Trajectory of Tornadoes
Authors: Zeng Yuanzhuo , Fu Yanjie , Lv Chenglin , Liu Wei 
Published: April 2021

Abstract
This paper attempts to study the rotation and advance characteristics of tornadoes by experiments and theoretical analysis. A cyclone generator that simulates the characteristics of tornado is completed, and put to experiments under different wind fields in the wind tunnel laboratory. The rotation pattern and advance pattern are analyzed from both the Bernoulli Principle and precession principle. Finally, this paper makes a summary of the research done so far and puts forward the prospect of the next experiment.
Remote Sensing Estimation for Aquacultural Algae Yield of Sea Area Based on Water Spectral Analysis
Authors: Cheng Yu , Zhang Lin , Li Kaiqiang , Zhu Hongchun 
Published: April 2021

Abstract
Mariculture yield estimation has an important significance in scientific planning and management of aquaculture scale. This study focused on the algae culture of sea area. The feasibility of constructing a remote sensing quantitative model for estimating the yield of algae culture was investigated through spectral characteristics analysis of sea water. Multi-source remote sensing data were used to analyse the spectral characteristics of sea water for coastal aquaculture. Low-pass filtering and threshold segmentation were used to classify algae culture areas. An estimation model was established based on trend yield and algae index for remote sensing quantitative estimation of the annual yield of algae culture. Results demonstrate that (1) the difference in spectral characteristics is mainly reflected in the blue-green band, the spectral reflectance of cultured shellfish is greater than that of cultured algae and the sensitive growth period is from February to April every year. (2) The total yield of algae culture estimated by counting the area of algae culture in Shandong Province is 520699 tons in 2019. This study shows the high accuracy and feasibility of remote sensing quantitative estimation model of algae culture yield.
Review of natural disasters in Yunnan Province of China
Authors: Yao Xiuyi , Fan Wenjie , Wang Wanqing 
Published: April 2021

Abstract
Various natural disasters have brought great economic losses and huge social influence under the complex regional environment in Yunnan Province. In this paper, we developed a comprehensive review on variety of natural disasters in Yunnan Province including strong earthquakes, landslides, floods and droughts. Based on the statistical analysis, some important prevention measures and suggestions were provided. This review will provide some references on the comprehensive natural disaster studies and it is helpful for natural disaster prediction.
Study on the Influence and Correction of Spatial Heterogeneity of Air Temperature in Drought Remote Sensing Monitoring
Authors: Zhang Rui , Li Hongjun 
Published: April 2021

Abstract
Temperature Vegetation Dryness Index (TVDI) is one of the commonly used methods in remote sensing drought monitoring. Since this method requires the study area to be large enough to achieve the ideal fitting of the dry and wet edges of the temperature-vegetation feature space, the spatial heterogeneity of meteorological elements has a significant influence on the results. Taking Hebei Plain as an example, the air temperature data at the moment of satellite transit are used to modify the surface temperature retrieved by remote sensing, that is, the surface temperature subtracts the spatial heterogeneity of air temperature, to eliminate the influence of the spatial heterogeneity of air temperature on the TVDI index. TVDI index and surface temperature before and after correction are compared in this paper. The results show that the spatial heterogeneity of air temperature does have a significant effect on TVDI index, and the surface temperature distribution after temperature correction is more reasonable, and will not have great effect on the method of using TVDI to monitor the degree of drought. It can be seen that the correction of surface temperature is more helpful to improve the accuracy of agricultural drought monitoring.
Classification of Deep Sea Sound Speed Profiles in the Northwest Pacific Based on Cluster Analysis
Authors: Zhang Yu , Wang Hua , Yu Xiangjun , LI Qinghong 
Published: April 2021

Abstract
Sound speed profile in ocean has significant seasonal and sea area distribution characteristics. Different sound speed profiles have different effects on underwater acoustic propagation, which makes the detection performance of sonar have significant differences. In order to study the distribution characteristics of sound speed profile in the Northwest Pacific, using WOA13 data set, calculate the number of types by application hierarchical clustering method, using cluster fuzzy c-means method classify sound speed profile, calculate the distribution area of various types in different seasons and typical sound speed profile structure. It is concluded that there are 6 types of sound speed profiles in Northwest pacific: Subarctic category, subarctic transitional category, subtropical transitional category, subtropical category, tropical transitional category and equatorial tropical category. The distribution area of these categories is generally zonal distribution. Except for the tropical transitional category and equatorial tropical category, the other categories have significant seasonal changes.
Assessment of Submarine Landslide Susceptibility in the Sea Area of Zhoushan
Authors: Shan Zhigang , Guo Fenfen , Lai Xianghua , Xiao Jingjing 
Published: April 2021

Abstract
The research on the submarine landslide susceptibility has important guiding significance for the site selection and construction of marine engineering. The Zhoushan Archipelago New Area is dominated by the marine industry, and the marine engineering under its jurisdiction is densely covered. This research selected the surrounding sea area of Zhoushan island as the study area to evaluate submarine landslide susceptibility. The factors such as seismic peak acceleration, proximity to fault zone, average wave height, slope and sediment types were selected to construct the evaluation index system, all of which were considered to be influential in the occurrence of landslides. Meanwhile, the AHP method was used to calculate the weight of each index factor. In combination with geographical information system, the study area has been classified into five classes of relative landslide susceptibility, namely, extremely low, low, medium, medium-high and high. The research result showed that: (1) The high susceptibility zone in the evaluation result was consistent with the position of historical landslide. (2) The five classes in the result of submarine landslide susceptibility assessment for study area accounted for 1.17%, 1.97%, 9.08%, 56.05% and 31.74% of the total area from high to low, and the area with susceptibility above middle grade mainly distributed in the underwater bank slope around the islands or the slopes position of the tidal current scours. (3) This research was a preliminary study on the susceptibility assessment of regional submarine landslides. It was limited by the availability of evaluation index data and submarine landslide data accumulation in the region. Besides that, the evaluation model was influenced by experience greatly, so the evaluation result had certain subjectivity.
Development of an unmanned device with picric acid strip for on-site rapid detections of sodium cyanide in marine water
Authors: Wang Ze , Yuan Tao , Yao Jingfang , Li Jiafan , Jin Yihui , Cheng Jinping , Shen Zhemin 
Published: April 2021

AbstractIn this study, a rapid detection method using picric acid test strip for detection of sodium cyanide in ocean water was established, and an automatic-integrated detection device was set up, which can be mounted on an unmanned surface vehicle. The optimal detection conditions were set as follows: for a 100-ml seawater sample, the weight of tartaric acid solid was 1.5 g, 1–2 drops of 150 g/L sodium carbonate were used to soak the picric acid test strip, the heating temperature was 80 °C, and the heating time was 5 min. Under the optimal conditions, the test result was satisfactory and the detection limit of the method achieved was 0.3 mg/L. This method realizes the remote and rapid detection of sodium cyanide in seawater, which greatly improves the detection efficiency and does not require any personnel to enter the contaminated site. It can be widely used for rapid detection scenarios such as leakage accidents from overseas transportation, lake pollution emergencies and on-site screening.
Proton magnetometer sensor design and its performance
Authors: Ma Ning , Chen Shudong , Zhang Shuang 
Published: April 2021

Abstract
The proton sensor is an important part of the proton magnetometer, which is mainly responsible for generating a polarizing magnetic field and receiving induced signals. This paper presents the design scheme of the proton sensor, including the selection of the internal coil structure of the sensor, the selection of the internal solution, and the design of the sensor shielding layer. Then introduces the proton sensor of the Canadian GSM-19T proton magnetometer, which is one of the world’s leading proton magnetometers. And the performance of the two sensors is compared and analyzed by designing sensor performance test experiment. The experimental results show that the initial amplitude of the test signal of the proton sensor is 2.2V, and the signal decay time constant is 0.86s, the performance is similar to that of the Canadian proton sensor.
Hyper-spectral estimation of soil organic matter in apple orchard based on CWT
Authors: Li Ruiyan , Gao Mingxiu , XU Zexin , Wang Jiafan , Xie Xiaoxin 
Published: April 2021

Abstract
In the quantitative estimation by spectra of soil organic matter (SOM), there are great difficulties in the extraction of characteristic spectral information. It is difficult to effectively improve the correlation with SOM by ordinary spectral transformations, and the spectral estimation models are not high in accuracy and applicability. The purpose of this paper is to explore a more accurate and more suitable non-destructive evaluation model for apple orchard soil. In this paper, an apple orchard in Shuangquan Town, Changqing District, Jinan City, was selected as the study area. The continuous wavelet transform (CWT) was used to process the original soil spectra at multiple scales, and the effect of the estimation model on the SOM correlation at different resolutions was investigated. The results showed that the CWT treatment significantly improved the degree of spectral response to SOM in the orchard. Compared with the original spectra, the prediction accuracy of the model constructed by CWT was higher. After wavelet algorithm processing, the prediction ability of the model tends to increase with the decrease of spectral resolution. The best prediction accuracy was found at the spectral resolution of 20 nm, with the coefficient of determination R2= 0.7547 and the root means square error RMSE=0.0042; the validation accuracy R2=0.8015 and the root mean square error RMSE=0.0039. The model achieved a more satisfactory prediction result at the spectral resolution of 5 nm also. The results show that the broad-band spectral data processed by CWT can be used for accurate monitoring of SOM in apple orchards.
Response of the Riverbed Evolution to Flood Process at A Curved Reach Downstream of Three Gorges Reservoir
Authors: Ge Hua , Deng Chunyan 
Published: April 2021

Abstract
The flood process has a very important impact on the evolution of the river. Based on the two-dimensional mathematical model of water and sediment, the response of the evolution of a curved reach downstream of the Three Gorges reservoir to different flood processes was calculated and analysed in this paper. The results show that under the premise of the same total amount of flood, when the flood process transits from the thin type to the short and fat type, the erosion amount of the channel increases gradually, but the increase extent of the channel above the beach reduced, resulting in the weakened erosion amount of the high beaches in the river.
Analysis of spatial changes in simple dwelling based on sustainable architectural approaches
Authors: Rezeki Simbolon Agustina Sri , Aulia Dwira Nirfalini , Fachrudin H T 
Published: April 2021

Abstract
Occupancy in housing built by the developer experienced changes that are not consistent with the original design, no exception to the pure residential housing program housing subsidies. Generally, the changes made to the residential layout occur after occupancy. Grand Permata Residence II Housing, Deli Serdang Regency is the housing that was built by a developer with a limited area of land and a restricted space of land that will be reviewed with a sustainable architectural approach to get alternative changes to an excellent residential spatial layout. Sustainable Architecture Approach is applied to realize housing that guarantees the well-being of its inhabitants. The method used in this study is a qualitative descriptive method with direct observation in the field and analyzed according to the rules of sustainable living. The results of this study are that changes in residential spatial planning and selection of building materials used are following the concept of sustainable architecture towards sustainable development.
Floating resort planning in Tano Ponggol with water conservation approach
Authors: Fachrudin H T , Atiarana Alifa Futi 
Published: April 2021

Abstract
The government of Republic of Indonesia built a supporting infrastructure for the growth of the Toba Lake National Tourism Strategic Area as an international tourist destination. One of infrastructure built is the Tano Ponggol Bridge, which becomes the only road connecting into that area. To help the government work program, planning accommodation becomes very urgent along with the development of tourist areas on Toba Lake. Planning a Floating Resort that has design ideas and new innovations is one solution to support government programs and tourism activities in Tano Ponggol. The method in this design starts from the site survey directly, then the data collection by observation, documentation, literature review and comparative study of similar projects and themes for the preparation of the planning concept of the Floating Resort in Tano Ponggol with the concept of a water conservation approach that will use water from Toba Lake as a support utility and can also be used as a design settlement at the resort. The application of the concept is applied to the utility system and also the design of the building that will show the process of collecting rainwater through the roof of the building and returning water to the lake.
Science and culture centre concept with energy-saving architecture approach
Authors: Fachrudin H T , Muhammad Sibarani Fadhil 
Published: April 2021

Abstract
Science and Culture Center is a place that become a center of educational activities, development of science and technologies, and also a meeting place, an interacting place, and a place for cultural exchange between communities. The problem raised in solving design problems is the lack of special designs that meet the needs of design objects in terms of learning and developing culture and science. The main purposes is as a forum for the local community to meet the needs of the center of non-formal educational activities and culture that can be a place for people to gather, move, learning science and culture. In this study, qualitative methods were used in literature studies and comparative study of similar objects involving technical factors and building requirements. Field observations are also carried out, by directly observing field conditions and collecting data by direct observation and interviews with relevant parties. The problems obtained were further analyzed so as to produce a design concept with the theme of Energy-Saving Architecture, including the use of renewable sources, solar cell power plants, techniques for using plants for roofs, rainfed parks, using gravel compacted for pavement areas, etc. The results in the form of design concepts and applications on the design object as a guide to continue the design of the Center.
The layout improvements of motorcycle parking facilities in hospital
Authors: Steven  , Willis Vertikal , Christine Sembiring Anita 
Published: April 2021

Abstract
Parking space is one of the facilities that must be considered in all types of public facilities buildings, one of which is a hospital. But unfortunately many hospitals make parking facilities tend to be careless and cause the parking space to become narrow, causing congestion in the entry and exit lanes, so that it can damage vehicle property. This research focuses on parking facilities for 2-wheeled vehicles in one of the largest hospitals in the Medan city area. The facilities of this hospital are classified as very severe. As for some of the problems contained in the parking lot are parking conditions that are always over (too full), very narrow parking lanes, and irregular parking conditions (causing severe congestion at certain hours). The final result of this study is to get the number of parking slots that must be provided and make a layout parking improvements.
GIS for USU campus transportation asset management
Authors: Anas Ridwan , Surbakti Medis S , Sembiring Irwan S , Puji Hastuty Ika 
Published: April 2021

Abstract
Transportation infrastructures consume a large number of resources, and managing infrastructure assets is a big issue in the public sector. Transportation asset management is important to obtain optimal performance as a result of maintaining, upgrading, operating assets, and making decisions. This paper proposes a concept to support campus management to maintain transportation assets by using the GIS database for maintenance and rehabilitation concerns. Universitas Sumatera Utara (USU) was one of the biggest universities in North Sumatera, consist of 16 schools and faculties with total area + 120 ha. Transportation infrastructure at the USU Campus includes roads, bus stops, pedestrian facilities, and parking areas. Transportation asset management based on GIS could combine with the budgeting system that supporting the decision-makers to recognize leads better outcomes for organizations.
Application of rice husk ash in high strength concrete
Authors: Nursyamsi Nursyamsi , Febrizal Aruan Ajuhan 
Published: April 2021

Abstract
Rice husk ash waste would cause dangerous environmental problems in soil and air. One of the solutions to overcome the environmental impact of rice husk ash is by processing it into a partial substitute for cement. The purpose of this study was to analyze the compressive strength of high strength concrete. The method used was experimental research by utilizing rice husk ash as a cement substitute in concrete with a percentage of 0%, 5%, 10%, 15%, 20%, and the addition of superplasticizer. The test object was made with a diameter of 10 cm and a height of 20 cm. The test object was treated using clean water. The strength of concrete with rice husk ash as a cement substitute was tested based on absorption and compressive strength of concrete on day 7 and day 28. Thus, the optimum compressive strength was obtained in the variation of 10% rice husk ash as the cement substitution. Based on this study, the highest average compressive strength was found in concrete with a variation of 10% rice husk ash, which was 38.5 MPa at 7 days and 56.2 MPa at 28 days.