bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ultimate External Pressure Capacity of Deepsea Dented Pipeline with Combined Axial Compressive Force
Authors: Chen Yanfei , Zhang Qi , Li Lulu , Hou Fuheng , He Guoyan 
Published: November 2019

Abstract
As a common defect of deepsea pipeline, dents will weaken the residual strength of the pipeline. In this paper, nonlinear finite element method is adopted to investigate the collapse failure of deepsea dented pipeline under the combined external pressure and axial compressive force. The influence of the axial compressive force on the collapse pressure of dented pipelines with different diameter-thickness ratio and dent depth are investigated based on numerical simulation. It is concluded that relative large axial compressive force will reduce the collapse pressure capacity significantly for deep dent case.
Effect of Current Variation on Microstructure and Properties of B4C Nickel-base Alloy by Plasma Surfacing
Authors: Liu Wei , Li Hongbo , Li Chunjie , Xiao Yu , Yang Minglong , Yuan Hua , Li Honglong , Li Shaohua 
Published: November 2019

Abstract
In order to study the hardness of nickel-based alloys and the effect of different mass fraction boron Carbide on the microstructure of nickel-based alloys. In this paper, different amounts of boron carbide are added to the nickel alloy powder. A layer of nickel alloy surface layer is welded on the surface of the Q235 steel plate by plasma surfacing technology. The microstructure of the laminate is observed and analyzed by using Caisijinxiang tissue microscope. The hardness of the welding layer was tested by microhardness meter and the influence of boron Carbide on nickel alloy was obtained. The results show that boron carbide and nickel base alloy are well fused. The surfacing layer is mainly composed of fine dendrites and herbaceous eutectic structures. The addition of boron carbide can significantly improve the hardness andfine structure of the surfacing layer. With the increase of the content of boron carbide, the hardness of the surfacing layer first increases and then decreases. The experimental data show that when the mass fraction contentof boron carbide is 6% and the current is 110A, the hardness of the welding parts is higher.
Novel square spiral Coil for achieving uniform Distribution of magnetic Field
Authors: Liyuan Yu , Shushu Li , Pingjuan Niu , Hao Shi , Run Mao , Zheng Cheng 
Published: November 2019

Abstract
In view of the problems existing in the existing wireless charging technology, the anti-offset performance of the charging region and the system was studied. A primary transmitting coil capable of achieving uniform magnetic field distribution was proposed. The magnetic field strength at a point on the coil axis and above the coil surface was calculated, and the surface current density of the transmitting coil was analyzed to calculate the radius of each turn of the spiral winding coil. Optimized the structure of the transmitting coil, the number of turns and the arrangement of the coils, A square spiral coil having a size of 20 cm η 20 cm and a number of turns of 11 inches was determined. The optimized square spiral coil was modeled by the software comsol5.3 RF module, and the strength and uniformity of the coil surface and axial space magnetic field were simulated. The axial magnetic field on the surface of the coil was measured by a multi-dimensional visual electromagnetic measuring device, and compared with the simulation data, it was proved that the axial magnetic field of the square spiral coil surface satisfied the uniformity requirement.
Battery SOC Prediction for HEV based on Extreme Learning Machine
Authors: Jing Elin , Mao Ping , Dong Hengping , Wang Qi 
Published: November 2019

Abstract
The extreme learning machine (ELM) is proposed based on the prediction of the battery’s state of charge (SOC) of the hybrid electric vehicles (HEV). The HEV simulation system is developed under the environment of advanced vehicle simulator (ADVISOR). Considering the influence of working condition to SOC, the Urban Dynamometer Driving Schedule (UDDS) is adopted as the working condition. At the same time, the energy feedback is also taken into consideration when HEV under regenerative braking mode is working. The working voltages, currents and surface temperature of battery are employed to predict the real-time value of SOC, and the results indicate that the prediction model possesses higher predicted accuracy.
The application of OFDM in optical fiber communication systems
Authors: Luo Xuanjie 
Published: November 2019

Abstract
Orthogonal frequency division multiplexing (OFDM) is a special multi-carrier transmission technology. It utilizes digital signal processing (DSP) to perform inverse Fast Fourier transform (IFFT) and generates a set of orthogonal subcarriers for parallel transmission of low-rate digital signals, achieving the transmission of high-speed digital signals. It has the advantages of high spectral efficiency and anti-dispersion, and has broad applications in large-capacity and long-distance optical fiber communication systems and optical access networks. In this paper, the working principle, structure and application of OFDM in optical fiber communication systems are investigated. Then the problems which should be solved in the application of OFDM in optical communication systems are discussed. Finally, the development of OFDM system is prospected.
Research on finite element simulation and control method of plate head bending
Authors: He Chunyu , Chen Yafei , Chen Fangsheng , Jiao Zhijie 
Published: November 2019

Abstract
During the plate rolling process, due to the influence of the asymmetry conditions, the head of the rolled piece often shows bending. When the head of the rolled piece is bent to a certain extent, the damage to the on-site production equipment is extremely great. It is important to study how to control the head bending phenomenon in the production process to the actual production process. This paper chooses the range of parameters in which the plate is prone to head bending, and establishes the thermo-mechanical coupling model of finite element. Based on the inlet thickness, reduction ratio and roller speed difference as the initial conditions, the head bending was simulated to analyse the law affecting the plate head bending. At the same time, artificial neural network is used to train the simulation result data, and the nonlinear mapping relationship between each influencing factor and the head bending value is obtained, and then the control method of the plate head bending is established. The research in this paper has practical guiding significance for the development of plate technology.
Research for Process on Investment Casting of Impeller Based on 3D Printing
Authors: Zhang Yue , Li Xueying , He Lincong , Ma Changliang , Liu Xiyu , Mao Yinghua 
Published: November 2019

Abstract
Impellers are widely selected as the research object for its characters of curved surface and high-demanded surface quality. The investment casting of alloy ZL104 impeller with PLA 3D printed pattern is performed. In order to optimizing the process of impeller, CAE analysis software AnyCasting is carried on for the design of gating system. The cross-sharp side gating system is selected as the outstanding one for none defects and uniform filling process. Moreover, the gating system with four uniform distributing risers is established as the prime solution. All the conclusions is checked in the reality experiments that investment casting based on 3D printing, with association of CAE simulation can promote the production efficiency.
Research on a Soft Measurement Method for SOC of Electric Vehicle Battery
Authors: Sun Zhengfeng , Su Lei 
Published: November 2019

Abstract
Aiming at the problem that the State of charge (SOC) can not be directly measured, the SOC soft sensing method based on subtractive clustering and adaptive fuzzy neural network is introduced. Firstly, the structure of AFNN was decided by SC; Secondly, by adopting the back-propagation algorithm and least square method respectively, the front and back parameters of AFNN were optimized, and the study efficiency of the parameters was raised. Finally, the fuzzy membership functions and rules which generated automatically by AFNN are applied to the soft measurement of battery SOC for HEV. Under the CYC-HWFET working conditions, the working voltages, currents and surface temperature of battery are used to predict the value of SOC, and the results indicate that the prediction model possesses higher predicted accuracy, and the errors between the real value and the soft measurement value are small.
WaveNet: learning to predict wave height and period from accelerometer data using convolutional neural network
Authors: Liu Tong , Zhang Yongle , Qi Lin , Dong Junyu , Lv Mingdong , Wen Qi 
Published: November 2019

Abstract
Inertial sensors carried by buoys, such as accelerometers, are widely used in wave characteristics measurement. Traditional methods usually employ numerical integration on the accelerate data for wave height, where the “drifting” errors are intractable. In this paper we propose a novel method to predict wave height and period using machine learning approach, specially a convolutional neural network. The end-to-end 1D convolutional neural network named WaveNet predicts wave height and period from the raw acceleration data directly. We designed a simple device to simulate the motion of the buoy in the wave, and used it to collect data for training and testing our model. The results of the proposed method were compared with traditional numerical integration method and found that the proposed model outperforms existing method in outputting more accurate wave height and period.
Sandwich Particleboard (SPb): effect of particle length on the quality of board
Authors: Iswanto A H , Ompusunggu P L 
Published: November 2019

Abstract
Sandwich particleboard is one of the composite products composed of strength lignocellulose materials for the surface layer and particle as the core layer. This product consists of three layers which are similar to comply. The difference between both products is in the surface layer, which uses veneer or thin plywood as surface. The objective of this research was to evaluate the length particle effect on physical and mechanical properties of SPB. Belangke bamboo, corn stalk bagasse and isocyanate resin were the main raw materials for the manufacturing of SPB. SPB was made in size of 25 x 25 cm with the density and thickness target of 0.7 g/cm3 and 1 cm respectively. Amount 8% level isocyanate resin was applied in the manufacturing of board. Hot pressing parameter such as temperature, time and pressure was set on 160 °C, 5 minutes, and 30 kg/cm2 respectively. The results showed that 10 cm particle length resulted in the best bending properties. MoE and MoR value of 10 cm particle length were 42, 156 and 333 kg/cm2 respectively. Almost all parameters fulfill the JIS A 5908 (2003), except the internal bond and the thickness swelling value.
The practice of agroforestry Toona sureni merr by the community of Simalungun Regency, North Sumatera
Authors: Latifah S , Purwoko A , Hartini K S , Sadeli A , Tambal T N R 
Published: November 2019

Abstract
Agroforestry contributes to addressing the problems the world is facing today. Regarding economic well-being, agroforestry can increase diversify farmers’ incomes and allow them to have access to more nutritious food. The community of Pematang Sidamanik Sub-district conducted an agroforestry pattern that combined forestry crops with various crops. This research aimed to examine the practice of agroforestry. Methods of data collection were interview techniques and field observation (survey). Data processing was qualitative descriptive analysis method. Cultivation techniques for T.sureni in study site are the provision of seeds, maintenance, and harvesting simply done by the community. Suren tree is used as a raw material for building, furniture, ships and canoes, while suren leaves are used as vegetables, medicines and organic pesticides/insecticides. Agroforestry practices are influenced by the land and tree tenure system (private or state-controlled) that farmers operate. Tenure affects the decision of farmers to make about the kind of agroforestry system they can use.
Evaluation of peat soil properties for oil palm plantation in nine years of plant at Kubu Raya District, West Kalimantan, Indonesia
Authors: Rauf A , Harahap F S , Rahmawaty  
Published: November 2019

Abstract
The aims of this research was to evaluate the nature of peat soil used for oil palm plantations in nine years of planting has been carried out in several private oil palm plantation companies in Kubu Raya District, West Kalimantan Province from May to June 2018. Research using survey methods with soil sampling was carried out intentionally (purposive sampling) in oil palm plantations planted on peatlands from 2009 to 2017. The results showed that the chemical properties of peat soils used for oil palm plantations in different planting years were qualitatively similar based on the assessment criteria of chemical properties. Quantitatively, some soil characteristics levels were very high. Mineral soil under peat at the study site cannot be used for ameliorant peat material because of pyrite compound. In order to maintain the quality of peat soils used for oil palm plantations, the application of ameliorant material which does not affect the acceleration of decomposition of peat soil material, must be continuously increased to the maximum extent possible.
Land use analysis of coastal belt in the coastal area of Langkat Regency North Sumatra Province using Sentinel 2 Satellite imagery
Authors: Slamet B , Nadira S , Basyuni M 
Published: November 2019

Abstract
Population growth increases pressure on land resources and leads to the use of the land that contravenes to its allocation. The coastal area of Langkat Regency is an area with high levels of pressure on land. The aimed of this study was to evaluate the use of the coastal belt and river belt in six districts of Langkat Regency North Sumatra Province using Sentinel 2 Imagery. The results of the accuracy test of the land cover classification showed good results with the overall accuracy was 99.56%, and kappa accuracy was 99.18%. We found that land use in this area dominated by oil palm plantations which reached 33,400.31 hectares. Coastal belt with a distance of 0-100 meters dominated by mangrove vegetation with an area of 386 hectares or 38.14% of the total Coastal belt area. Fishponds dominated the land use on the river belt area at a distance of 0-50 meters with an area of 1,217 hectares or 64.73%. We found that land use that contravenes to its function on the coastal belt was mainly for oil palm, fish ponds, and rice fields. It is necessary to rehabilitate the land determined by the government as a forest area to maintain the area’s protection function.
Reference lateral design value of single shear connection of Merbau wood using bolt
Authors: Herawati E , Sucahyo  , Nugroho N , Karlinasari L 
Published: November 2019

Abstract
The reference lateral design value is the basic load capacity for a fastener subjected to a lateral shear load. The design value is a consideration in designing a wooden connection. The main objective of this research was to determine the reference design value for a single bolt connection using Merbau wood. In this study, the experimental reference lateral design values were determined from the load-deformation curve with a 5% diameter offset method based on connection testing which refers to ASTM D5652 standard test methods for bolted connections in wood and wood-based products. Meanwhile, the prediction reference lateral design values were determined based on the formulas in the national design specification for wood construction. The wood used was Merbau (Intsia spp) using three bolt diameters (1/2, 5/8 and 3/4 in) and several wood thickness combinations. The results showed that the experimental design reference values ranged from 475 kg to 887 kg. The reference lateral design value was influenced by a combination of wood thickness and bolt diameter. The greater the thickness of the wood and the diameter of the bolt, the higher the value of the design obtained. The ratio between predictive Z according to yield mode and minimum Z in NDS and experimental Z showed the range from 0.53 to 1.07 and from 0.53 to 0.91.
Leaf nutrition content and organoleptic of Jeruju (Acanthus ilicifolius L) and processed products in Lubuk Kertang Village, North Sumatera
Authors: Basyuni M , Siagian Y S , Slamet B , Sulistiyono N , Putri L A P , Yusraini E , Lesmana I 
Published: November 2019

Abstract
Mangrove forests in North Sumatera existed in the east coast of Sumatera Island and are promptly disappearing due to anthropogenic activities. Utilization of mangrove forest products still lacks of consent, thus application of appropriate technology is necessary for sustainable use of mangrove forest products to improve economy of coastal communities without impacting damage to the mangrove ecosystem. This study aims to examine the content of nutrients of jeruju leaves (Acanthus ilicifolius), jeruju crackers, the processed products and also the storage period of jeruju cracker. The nutritional content and the storage period of the product were performed using proximate analysis and hedonic test. Results showed that the storage time of jeruju leaves, original jeruju crackers, and spicy jeruju crackers affected on decreasing of the moisture content, ash content, fibre content, and antioxidants. Contrary, the fat and protein content increased by prolonging the storage time. Concerning on the nutritional content of jeruju leaf, jeruju crackers, the quality and selling value of the mangrove processed products could be improved. The present study suggests that processing of mangrove products affected the nutrients content and the storage time of the product.
Analysis of vegetation density change in coastal villages of Tapanuli Tengah and Sibolga using landsat images
Authors: Samsuri  , Zaitunah A , Siregar H I 
Published: November 2019

Abstract
Indonesia is an archipelago country that has a long coastline of approximately 99,093 km. Most of the areas are intensively exploited by human activities. The increased population and development activities in the coastal area of Tapanuli Tengah and Sibolga have caused degradation and conversion of forests that cause the density of vegetation change. This research was conducted by overlaying some spatial data of the year 2007 and 2017 to analyze the changes of vegetation density and NDVI (Normalized Difference Vegetation Index) values between 2007 and 2017. The research result showed that the largest area of vegetation density changes was the decreased of very dense class, which wass 62.48%. The largest area increased occurred in the dense class of 50.75%. This research is expected to provide information for considering the management of coastal areas in Tapanuli Tengah and Sibolga.
The physical properties of densified Terentang wood (Campnosperma auriculatum (blume) hook. f) on various steaming and pressing time
Authors: Somadona S , Sribudiani E , Rahmawati A 
Published: November 2019

Abstract
The need for wood to meet the raw material of forestry industry is increasing, but the availability of high-quality wood tends to decrease. It is due to the prohibition to harvest wood from natural forests. To fulfill the wood needs, innovation needs to be done. One of the innovations in the field of wood construction is needed to overcome the scarcity in fulfilling the raw material of forestry industry by developing potential domestic of wood species, as well as fast-growing species. One type of fast-growing wood used is Terentang (Campnosperma auriculatum). Terentang wood has a low level of wood strength (strong class III-IV), so it is less desirable. One technology that has the potential to improve wood quality is compaction or wood compression, with a preliminary treatment of steaming or boiling wood at certain temperatures and pressures. The results of the study showed that the compaction technology applied to Terentang wood (Campnosperma auriculatum) was able to improve the physical properties of wood in moisture content, specific gravity, and dimension shrinkage, but not in the dimensions swelling. Where compressed Terentang wood has increased the strong class of Terentang wood into strong class II (0.632−0.851) seen from its specific gravity based on PKKI NI-5-1961.
Effectiveness of botanical hydrocolloid of grass jelly leaf and seaweed to delay ripening of banana
Authors: Dinarto W , Riyanto R , Sungkono A 
Published: November 2019

Abstract
Banana has an important purpose as the source of vitamins, minerals, and other substances in supporting nutritional adequacy. However, there is an obstacle in the supply chain of banana from producers to consumers with prime quality because of the nature of banana which is perishable. Therefore, it is necessary to implement any mean to delay the ripening of banana so that the process can be inhibited and the quality of banana maintained, among which is the fruit skin surface coating technology. The aim of this study was to determine the appropriate material and concentration of botanical hydrocolloid to delay ripening of bananas. This research was conducted in November to December 2014 in the Agronomy Laboratory of University of Mercu Buana Yogyakarta. The research is a single factor experiment arranged in a completely randomized design with three replications. The treatments tested were both hydrocolloid material of seaweed (Euchema spinosum) concentration of 1.5%, 2%, 2.5% and grass jelly (Stephania hernandifolia) with concentration of 2.5%, 5%, 7.5%. The result showed that based on either the percentage of fruit weight loss, fruit skin discoloration, hardness (texture), or total dissolved solids, the grass jelly hydrocolloid with the concentration of 7.5% is the best application in delaying the ripening of banana. The coating of banana with grass jelly hydrocolloid concentration of 7,5% is capable of inhibiting ripening of bananas for 11 days.
Profile of cholesterol and glucose on the various age of volunteers with composite flour diet
Authors: Kanetro B , Swasono D H , Astuti T D , Sahrah A 
Published: November 2019

Abstract
The preliminary research showed that the glycemic index (GI) group of the composite flour made of Growol cassava and mung bean flour as raw material of artificial rice was low, so the composite flour might be potential for reducing blood glucose. This research is aimed to determine the profile of cholesterol and glucose level on the various age of volunteers with composite flour diet. The treatment of the research was the age group of volunteer and the diet treatment. There were three group volunteers based on the age, that were 15 – 26; 27 – 38; and 39 – 50 years old. The volunteers were adapted for 4 days with steamed rice diet as a normal diet, then were treated with composite flour as diet treatment for 16 days. The composite flour was formed like rice and steamed before used as the treatment. The blood trygliseride, total cholesterol, LDL and HDL cholesterol, and glucose level of the volunteers were analysed on 4th, 8th, 12 th, and 16th days for the treatment and before the treatment as control (0th). The result of this research showed that the potency of hypocholesterolemic of the diet treatment were shown by decreasing of blood LDL cholesterol at the age group of the 39 – 50 years old. The potency of hypoglycemic of the treatment were shown by decreasing of blood glucose level of volunteers at the all of age group. That was indicated that the composite flour might be potential to normalize cholesterol and glucose.