bluuebunny/crossref_metadata_2025_split huggingface dataset:
Arthropod Diversity on Forest Stands in South Sumatra, Indonesia
Authors: Utami S , Kurniawan A , Muslimin I 
Published: December 2019

Abstract
Arthropods have an important role in the forest ecosystem. Arthropods play a role in food webs as herbivores, carnivores, and detritivores. This study aims to analyze the diversity and abundance of arthropods in different forest stands, namely Pelawan (Tristaniopsis merguensis), Cajuput (Melaleuca cajuputi), and Sungkai (Peronema canescens). The research was carried out in the Forest Research Station of Kemampo belonging to the Environment and Forestry Research and Development Institute of Palembang, South Sumatra, Indonesia; through an observation approach with sweep nets, then taken to the laboratory for selection and identification. Research results showed that the levels of arthropod diversity in Pelawan, Cajuput, and Sungkai were relatively low. Those arthropods belong to 8 families with the highest number of the individual dominated by Pelawan stand, followed by Cajuput and Sungkai stands. Arthropod families consisted of Formicidae, Lycosidae, Elateridae, Scarabaeidae, Crabronidae, Chrysomelidae, Scolitidae, and Entomobryidae. The diversity index of arthropods under Pelawan, Cajuput, and Sungkai stands were 0,68; 0,31; and 0,3, respectively. The dominance index of arthropods on Cajuput stand was higher than in Pelawan, and Sungkai stands.
Bird Diversity and Its Association in Mangrove Habitats of Teluk Bintuni Regency, West Papua
Authors: Cita K D , Budiman M A K 
Published: December 2019

Abstract
Birds are one of the most essential components to maintain the stabilization of the ecosystem. Mangroves are one of the most biologically diverse ecosystems providing shelter and feeding sites for many species, but mangrove habitats are under severe land-use pressure through the world including Indonesia. The aim of this study was to identify the diversity of birds and their association with vegetation in Mangrove Habitats of Teluk Bintuni Regency. In this study, we assessed bird species diversity within six mangrove habitats that are Weriagar, Tanah Merah, Irarutu, Amutu, Kalipotong, and Muara Retui. This research was conducted in March 2019 with the rapid assessment method. According to our estimate, there were 54 bird species with 28 families which were dominated by Laridae in all sites. Tanah Merah was the location that had the highest number of species diversity (H’2.95). It is caused by diverse vegetation in Tanah Merah. This information could be useful for sustainable development of mangrove habitats.
The Diversity of Endophytic Fungi in Kemaitan (Lunasia amara Blanco)
Authors: Istikorini Y , Hartoyo A P P 
Published: December 2019

Abstract
All plants in natural ecosystems appear to be symbiotic with fungal endophytes. Endophytes are especially little known in tropical forest trees, which their abundance and diversity are thought to be greatest. This research aims to identify the diversity endophytes fungal in the shoots, leaves and stem of Kemaitan (L. amara). There are 180 endophytic fungi were isolated using a modified Photita’s method, by isolating in their shoots (34 isolates), leaves (70 isolates), and stems (76 isolates), which categorized in 37 morphospecies. The number of morphospecies endophytic fungi found on stem was higher (24 morphospecies) than on shoot and leaf (22 morphospecies). The index value of endophytic fungi on Kemaitan’s stem (3.050) was considered as high diversity, while on shoots (2.966) and leaves (2.911) were classified as moderate diversity. The index value dominance of endophytic fungi was categorized as low criterion. The evenness levels on stem, leaf, and shoot of Kemaitan were categorized into high level. The level similarity if endophytic fungi is categorized as low similarity.
Rhizophora mucronata Lamk Seedlings Growth Model with Guludan Planting Technique in Angke Kapuk, Jakarta Coastal Area
Authors: Haris AM , Kusmana C 
Published: December 2019

Abstract
Mangrove seedlings planted using the guludan technique are considered to produce optimal growth. Mangrove planting using guludan is an alternative for mangrove rehabilitation in former pond areas with deep water pools (more than 1 m). This study aimed to analyze the growth model of Rhizophora mucronata seedlings (growth in stem diameter and height, number of leaves, number of internodes, number of stilt roots) planted with guludan technique in Angke Kapuk, Jakarta Coastal Area. Measurements were made in the Angke Kapuk Mangrove Forest Area, Jakarta, in January 2019-April 2019. A total of 20 individuals from the 2018 planting year group were chosen as individual samples, were planted with Rhizhopora mucronata with a spacing of 0.5 m × 0.5 m. The data taken were the growth of stands, which include stem diameter, height, number of leaves, number of internodes, and number of stilt roots in the guludan. The results showed that the growth of stem diameter and height of R. mucronata seedlings for 12 weeks of observation formed a positive exponential equation. During the observation period (12 weeks) of the 20 R. mucronata seedlings seen, there were 380 leaves, 53 internodes, and four stilt roots growth.
Application of Silviculture Techniques to Improve Productivity of Binuang Bini Plant (Octomeles Sumatrana Miq.) as an Alternative Plant in Community Forest
Authors: Bogidarmanti R , Darwo  
Published: December 2019

Abstract
Currently the type of wood in community forests on Java Island is dominated by sengon species. However, this type faces problems with attacks of gall rust diseases One of the potential species as a substitute for light construction wood is binuang bini (Octomeles sumatrana Miq.). To increase stand productivity, it is necessary to apply the right silvicultural techniques. The purpose of this study was to find out the right silvicultural technique in order to increase the productivity of the binuang bini stands. The study design used a split plot design. The results showed that the organic fertilizer dose had a significant effect on the growth of the diameter and height of binuang bini stands. Fertilizing used bioactive compost charcoal with a dosage of 4 kg / planting hole can increase the growth in height and diameter of binuang bini plants was twice that of control treatment at the age of 30 months after planting. The pattern of binuang bini planting can be mixed with the other species such as Mindi (Melia azedarach L.) and/or Trema (Trema orientalis L.)
Characteristics of the cement board from parring bamboo (Gigantochloa atter)
Authors: Taskirawati Ira , Agussalim  , Baharuddin  , Sanusi Djamal , Suhasman  
Published: December 2019

Abstract
As a non-timber forest product, bamboo is widely used as a craft material, construction, and food (bamboo shoots). Bamboo as a lignocellulose material can also be used as a raw material in the manufacture of cement boards. This research was conducted to compare the characteristics of the cement board derived from bamboo paring with various treatments. The type of bamboo used is bamboo parring (Gigantochloa atter), while the cement used is Portland Cement Composite (PCC). The cement board was made using conventional and CO2 injection methods with the addition of additives (CaCl2, MgCl2, and Ca(OH)2). The characteristics of the cement board were tested based on JIS A 5417-1992. The results showed that the addition of CaCl2 using the CO2 injection method significantly improved the physical and mechanical properties of the cement board.
Ulin (Eusideroxylon swageri T.et.B) seed cleavage, fast way of germination in Sambas Regency, West Kalimantan
Authors: Sudarmono  , Efendi M 
Published: December 2019

Abstract
Ulin (Eusideroxylon swageri T.et.B) or Ironwood has never been cultivated by the people in Sambas, West Kalimantan. As the limited duration of the germination and growth of ironwood trees need to breakthrough propagation techniques. Forests in Sambas Regency are beginning to lose the ironwood trees because of the wood that is strong and durable (including the strong class I and durable class I), so that it is widely used for building houses and bridges. This study aims to propagating of ironwood seeds through propagation techniques. The seed coat treatments and cleavages used for this experiments in Sajingan Besar of Sambas Regency. Sowing seeds regular of Ironwood takes 9 months and can accelerated to be 3 months but the seed coat must be peeled first. The characteristic of ironwood seed has a polyembryonic seed, so that used treatments of cutting the seeds to be 2 and 3 parts of seed. The results that the ironwood seeds can grow faster after 4 weeks planting if peeled the coat and cutting seeds into two part of seeds. The quantitative analysis explained and showed in this paper.
Numerical Study on Cavitation Characteristics of High Speed Fuel Centrifugal Pump
Authors: Li Xiaoyu , Ji Yunguang , Liu Xiaolan , Cui Hongbin , Xue Shuqi 
Published: December 2019

Abstract
For centrifugal fuel pump operating at high speed, the flow passage components in the pump will be more prone to cavitation, which may lead to efficiency decrease and failure. A single-stage high-speed centrifugal fuel pump is taken as the research object in order to study the phenomenon and the law of cavitation flow in this paper. The influence of different blade inlet angles, rotating speeds and fuel temperatures on cavitation of pump is then studied using numerical method. The results show that properly increasing the blade inlet angle can improve the cavitation performance, and at different rotational speeds, the degree of cavitation is determined not only by NPSHr, but also by Speed C of cavitation, however fuel temperature has rather small influence on the cavitation performance of the fuel pump.
Comparison Research on the Sino-US Maritime Development in Marine Engineering
Authors: Li Feifei , Dang Kun 
Published: December 2019

Abstract
Marine engineering, applying engineering sciences, mostly mechanical and electrical engineering, to the development design, operation and maintenance of the vessels. China and the United States have made rapid progresses in the maritime development for decades, among which, the development in marine engineering between two countries is analyzed and compared through maritime education, training ships, etc in this paper. It is found that there are many differences in selecting the marine propulsion and transmission system, sea practice and ship types and so on.
The multi-level urban rail traffic safety based on fuzzy TOPSIS evaluation research
Authors: Chen Jiaxu 
Published: December 2019

Abstract
With the expansion of the scale of the urban rail transit network and the increase of the factors affecting the safety of the operation of the network, the operation risk of urban rail transit is also increasing. For urban rail transit network security problems, according to the statistical analysis of urban rail traffic accident, first constructed oriented network station, line, different levels of urban rail traffic safety evaluation index system, from the three levels of urban rail transit network security influence factors were analysed, and further improving the system of safety evaluation index; Secondly, TOPSIS evaluation method based on triangular fuzzy number is used in this paper to evaluate the safety risk of urban rail transit, which overcomes the disadvantage of subjective factors in AHP and FAHP evaluation methods. Finally, the model is calculated and analysed. This paper provides decision-making basis for the safety management department of urban rail transit, and has certain reference significance for improving the safety management level of urban rail transit.
Research on Route Search of Connecting Flights in International Airline Network
Authors: Ma Ruixin , Chen Xian , Liu Jian , Zhu Jinfu 
Published: December 2019

Abstract
With the development of global aviation industry, a huge international airline network has been formed. In order to solve the problem that the connecting path search method takes long time in global airline network, the objective of this paper is to find out all the target connecting flights paths fast between an OD pair. According to the features of the connecting path search in the schedule-based network, the solving method is divided into three stages. In the first stage, we build a time-space graph. In the next stage, three-step cutting is used to reduce the scale of graph. After that, we apply an algorithm which is combined with depth-first and breadth-first search algorithm to enumerate the paths. It can be seen that our algorithm is suitable for multi-constraints, big data and searching all paths.
Research on traffic zone partition method based on two-level partition theory
Authors: Li Yongchang , Yan Xuedong 
Published: December 2019

Abstract
As an important part of traffic planning, traffic zone division has drawn much attention for decades. Better than traditional methods of traffic zone division based on traffic surveys and road network structures, this paper proposes a two-level framework for dividing traffic zones by using massive car-hailing data from a big data perspective. Firstly, the grid model is established within the study area and massive travel data are matched into grids. Secondly, the Louvain community detection algorithm is used to divide the research area into different traffic medium zones (TMZs). Further, a K-prototype clustering algorithm based on partition is used to divide each TMZ into several traffic small zones (TSZs). Taking the Beijing Fifth Ring as an example, the study area is divided into 16 TMZs and 302 TSZs by using two-level partition theory. The proposed method of dividing traffic zones is proved to be efficient and accurate and can be easily applied to other areas, which helps planners to make more smarter traffic planning and city management.
Development of Rail Precision Cleaning Vehicle for Modern Tramway
Authors: Dong Hanjiang , Ma Wentao , Huang Jingwen , Li Haijian , Huang Yanming , Liu Xin , Li Jingui , Lin Zenan , Xie Yongjun 
Published: December 2019

Abstract
Supported by the Zhuhai Collaborative Innovation Project, we develop a Road-Rail Precision Cleaning Vehicle for the rail of the first modern tramway based on the Tram Wave system in China, which has been built in Zhuhai City. Development scheme of overall mechanical structure, electrical control and condition monitoring system and man-machine interface system has been realized. We also designed a target recognition algorithm based on OpenCV to control actuators like solenoid valve, electromagnetic clutch and air pressure regulating valve and so on.
Evaluation of Cloud Model for Public Transport Service Quality
Authors: Meng Zhang , Yi Zhang , Li Jinhui , Wang Xiaomin , Wang Zhixin 
Published: December 2019

Abstract
In order to practice bus city planning, it is of great significance to construct a reasonable urban bus service system. At present, there are various research models and methods, and a city bus service quality evaluation model is established based on the advantages and disadvantages of various methods. Analytic hierarchy process and coefficient of variation method were combined to form subjective and objective weights, and cloud model was established for comprehensive quality evaluation. The feasibility of the model is verified by the measured indexes of public transportation in Luoyang City, which proves the rationality of the evaluation method and provides reference for other cities.
Study on PSD of track irregularities of Beijing Metro Line
Authors: Feng Jin , Xiao Hong , Ling Xing 
Published: December 2019

Abstract
Track irregularities are the significant factor of vehicle vibration. In this paper, track spectrum is combined with the theory of finite element method. Dynamic responses of several track spectrums such as spectrums of the USA and Europe are compared with the field investigation result. The comparison prove that the spectrums which are mentioned above are not applied well to the construction and maintenance of the metro line. Using the method of wavelet theory and error removing algorithm, process the raw data which is measured by the track inspection car. And by using nonlinear least square method, get the track spectrum of the metro line, and constructed a FEM model for verification. The results say the spectrum we put forward has significant advantages compare with other track spectrum. Through this way, this work fills the blanks on field of metro line track spectrum.
Research on Calculation of Port Optimal Anchorage Demand Based on Queuing Theory
Authors: Huang Qingyve , Hu Liu 
Published: December 2019

Abstract
In view of the contradiction between the supply and demand of anchorage resources, the research on the optimal anchorage demand of the port is carried out. The M/M/c model is constructed by the queuing theory method combined with the main characteristic indicators and main parameter indicators. Taking the coal port area of the Huanghua Port as an example, the Matlab software is used to calculate and determine the optimal anchorage demand, which is 14, according to the restriction that the anchorage guarantee rate is greater than or equal to 95%. And the conclusion shows that the port anchorage resources are not tight. The calculation result shows that the model has certain application value in anchorage planning.
Analysis and Research on Aviation Power Operation Mode
Authors: Tang Guangrui , Qian Zhang 
Published: December 2019

Abstract
Aviation power operation can effectively improve the efficiency and safety of power grid operation and maintenance. It has become the trend of the world’s power operation field. Its operation modes are mainly divided into helicopter power operation and drone power operation. Helicopter power operation modes include helicopter power inspection operations, helicopter charged water flushing operations, helicopter live maintenance operations, helicopter infrastructure construction operations, and helicopter laser scanning operations. The drone power operation mode includes drone inspection work, drone clearing operation, and drone construction work. With the development of technology, the coordinated inspection mode based on helicopters and auxiliary aircraft will become the future development trend.
Characteristics of low-level wind shear in Qinghai Xining Airport
Authors: Xu Ting 
Published: December 2019

Abstract
Characteristics of low-level wind shear in Qinghai Xining Airport are analysed by using pilot reports and reanalysis data. It manifests seasonal and diurnal variation that the frequency is higher in spring and summer, and for diurnal variation, it is higher in afternoon and early night. The weather patterns of low-level wind shear can be roughly divided into four types. Their characteristics are also studied in this paper. And terrain effect is of importance to the cause of low-level wind shear, gorges and mountains lead to strong wind and variable wind direction.
Low Carbon Vehicle Routing Optimization with Multi-Energy and Multi-Vehicle Types under Traffic Restriction Conditions
Authors: Wang Heng , Wei Li , Wang Zhanwu , Xu Guangyin , Wang Zhenfeng 
Published: December 2019

Abstract
Aiming at the problem of automobile exhaust pollution and the measures of urban traffic restriction, this paper introduces the traffic restriction conditions into the vehicle path problem. Firstly, the speed characteristic models of different road conditions are established. Then, aiming to minimize the total cost such as carbon emission and distribution cost in the distribution process, a multi-energy and multi-vehicle hybrid vehicle path optimization model is constructed under traffic restrictions. Finally, an improved adaptive genetic algorithm is proposed based on the idea of simulated annealing. The effectiveness of the model and algorithm is verified by simulation experiments and examples.
A Quantitative and Comprehensive Evaluation of China’s Ecological High-speed Railway Development Based on DSR Model
Authors: Guo Jing 
Published: December 2019

Abstract
This paper evaluates the development status of China’s high-speed railway from 2010 to 2018 based on the DSR (Driving force, State and Response) model, and further evaluates the ecological development status of China’s high-speed railway in the future by using the analytic hierarchy process. The results demonstrate the overall trend of the development of ecological high-speed railway in China is good, but the driving force is insufficient, the proportion of state indicators decreases year by year, and the response indicators indicate an upward trend. According to the research and analysis, some suggestions are put forward for the development of ecological high-speed railway.
Numerical Analysis of Semi-rigid Asphalt Pavement Deflection under Dynamic Traffic Load
Authors: Yue Xuejun , Shi Jicun , Wang Junxiong , Zhang Qing , Li Zhongyu , Liu Tingguo 
Published: December 2019

Abstract
In order to detect dynamic deflection rapidly and continuously, a dynamic model under traffic load of asphalt pavement finite element was built, dynamic deflection with different traffic speeds and different point were studied; the dynamic deflection with different thickness of pavement layers and different dynamic modulus were also studied. Results show that the dynamic deflection is different with different traffic, the higher the speed the smaller the deflection, and the maximum deflection lags the peak traffic loads; road pavement thickness increased significantly reduced dynamic deflection, the order of thickness impact dynamic deflection was the surface layer, the base and subbase; the layers modulus increases the dynamic deflection reduced. Findings contribute to developing continuous and rapid dynamic deflection testing equipment based on dynamic deflection characteristics of the road surface.
Research on Influnence Law of Existing pipe-jacking Tunnel affected by Adjacent Foundation Pit Excavation in Soft Clay Stratum
Authors: Li Wenjiang , Han Xianmin , Chen Tao , Guo Xiaolong , Wang Kang 
Published: December 2019

Abstract
The problem that existing pipe-jacking tunnel was disturbed by adjacent foundation pit excavation had arose relative researcher’s attention, especially in soft clay stratum. Firstly, by means of numerical simulation, the deformation of diaphragm wall and settlement law of soil outside the pit during foundation pit construction were analyzed. Then deformation and stress characteristics of existing pipe-jacking tunnels were studied influenced by different spacing between foundation pit and pipe-jacking, different excavation depth of foundation pit and different buried depth of pipe-jacking. The main conclusions were as follows. (1) The maximum horizontal displacement of the diaphragm wall was located at 3/4 of the excavation depth of pit. (2) Due to the blocking or isolation effect of existing rigid pipe-jacking on the deformation of surrounding soil, the surface settlement became smaller.(3) Deformation, structural stress of pipe-jacking would gradually decreased under the conditions of increase of the spacing between foundation pit and pipe-jacking, decrease of excavation depth of pit and buried depth of pipe-jacking, (4) Due to the influence of pit excavation, deformation and stress of pipe-jacking near the end wall and middle of the foundation pit were relatively large. (5) When the buried depth of pipe-jacking was located at near 3/4 of excavation depth of pit and the spacing was less than 10m, excavation of the pit has a great impact on the existing pipe-jacking tunnel.