bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on comprehensive efficiency evaluation technology of regional photovoltaic power generation
Authors: Miao Xujuan , Xin Zhao , Yan Men , Chao Chen 
Published: November 2019

Abstract
Under the background of global potential energy crisis and regional environmental pollution, China‘s photovoltaic power generation still faces the key issue of sustainable development under the good prospect of large-scale development and utilization. Based on the identification and analysis of the factors affecting the overall efficiency of photovoltaic power generation, the system dynamics model is introduced to construct a comprehensive evaluation model of photovoltaic power generation, and the comprehensive efficiency transmission mechanism of photovoltaic power generation is studied. The comprehensive efficiency of photovoltaic power generation in Xinjiang in 2015-2017 is studied. The research results can provide support for the sustainable development of photovoltaic power generation and provide guidance for improving the efficiency of photovoltaic power generation.
Analysis and diagnosis of hot spot failure in c-Si PV module
Authors: Ping Yun , Yuzheng Liu , Heng Liu , Zhixiang Zhang 
Published: November 2019

Abstract
The hot spot types in crystalline silicon photovoltaic(c-Si PV) module can be divided into the followings: series resistance type, cell reverse biased type, bypass diode over-current type and direct-current (DC) arc type. The most common type was cell reverse biased type (hot spot as we know). By collecting all kinds of failed PV module (PID, aging, glass fragmentation, short circuit of bypass diode, and back sheet cracking) in practical power station, the characteristic parameter of cell reverse biased hot spot was determined after comparative analysis of IV curve. Based on this characteristic parameter, a set of diagnostic procedure was designed. Then we tested the procedure on the power optimizer, the diagnostic accuracy of hot spot was 95% and the recall rate was 96%. In order to reduce the temperature of hot spot, we added aluminum fins on the back of PV module, and the temperature of hot spot was lowered maximum by 19.3°C compared with conventional module, which indicated that the aluminium fins have a certain cooling effect.
Risk Management and Control Model of UHV Construction Cost Based on Risk Matrix Method
Authors: Chen Tianqiong 
Published: November 2019

Abstract
Strengthening cost risk management and control is of great practical significance for promoting UHV project construction with high quality. Firstly, the UHV project construction cost index system which covers construction engineering fee, installation engineering fee, equipment purchase fee, other expenses and basic reserve fee was constructed. Secondly, the cost risk assessment model of UHV project construction based on the optimized risk matrix was proposed. Finally, a case study was carried out to verify the scientificity and rationality of the model.
Research on 5G optical transport schemes
Authors: Cheng Yitai 
Published: November 2019

Abstract
With the rapid development of 5G technology, its network architecture has changed a lot compared with 4G, which brings many challenges to optical transport network. In this paper, we first discuss the network architecture difference between 4G and 5G. Then, we investigate the optical transport schemes of 5G network, including fronthaul schemes, middlehaul schemes and backhaul schemes, respectively.
The optimization research of investment management in power grid enterprise
Authors: Zhang Qian , Xia Liyu , He Wan 
Published: November 2019

Abstract
As an important platform for the power grid enterprise, investment management is an important gripper for implementing precise investment and lean management, and has a great significance on ensuring the strategic, planning of the company and achieving the overall efficiency and effectiveness. In recent years power grid enterprise put a high premium on investment management, and pay attention on the core role of investment management in enterprise management. However, with the continuous advancement of the power system reform and state-owned enterprise reform, the power grid enterprises face many new challenges in operation management. In order to improve the power grid enterprises’ management efficiency, it is necessary for the power grid enterprises to improve the content and models of investment management.
Investment Forecast of Power Network Infrastructure Project Based on BP Neural Network
Authors: Gao Yiquan , Cao Yang , Jiang Zhe 
Published: November 2019

Abstract
With the development of China’s economy and society, the demand for electric energy is gradually increasing, and large-scale investment in power grid infrastructure projects is being made. Due to the unreasonable investment plan, the investment balance rate of power grid enterprises in recent years is higher, which is not conducive to the scientific management of enterprises. Therefore, it is necessary to make investment prediction for power grid infrastructure projects in order to achieve the rational management and control of power grid enterprises for infrastructure projects. Based on BP neural network, this paper establishes the investment prediction model of power grid infrastructure projects, chooses the factors that have great influence on power grid infrastructure projects to analyse, and reduces the dimension of each factor based on principal component analysis method, which improves the accuracy and efficiency of the prediction. Finally, the effectiveness and advancement of the model are verified by an example of cable line project investment prediction of a power company. The results show that the prediction accuracy of the model is 93.1%, which can provide guidance for the reasonable formulation of the annual investment plan of power grid enterprises.
Study on Brazilian Splitting Mechanics and Acoustic Emission Characteristics of Impure Salt Rocks
Authors: Xu Deng , Liu Jianfeng , Liao Yilin , Zhang Qiangxing , Zhu Anqi 
Published: November 2019

Abstract
In order to study the mechanical and acoustic emission characteristics of salt rock under indirect tension, we conducted indirect tension cyclic loading and unloading tests and acoustic emission monitoring on pure salt rock and impure salt rock respectively by using MTS815 Flex Test GT rock mechanics test system and PCI-II acoustic emission (AE) three-dimensional positioning system. The results show that: (1) Both salt rocks show strong plastic deformation characteristics, but the plastic deformation ability of salt rocks is weakened by impurities, which is 79% of the average deformation ability of pure salt rocks. (2) The peak load and tensile strength of impure salt rock are higher than those of pure salt rock. The average peak value is 11.18KN and the average tensile strength is 1.81MPa, which are 1.55 times and 1.60 times of pure salt rock respectively. (3) The indirect tensile deformation characteristics of salt rock can be divided into three stages: damage stage at contact site, tensile deformation stage and post-peak deformation stage. (4) The acoustic emission signal is the most intense near the peak value, but the maximum ring counting rate and energy rate of impure salt rock are higher than those of pure salt rock. (5) When salt rock is destroyed, the whole crack surface is destroyed by tension, but the crack area of pure salt rock is much larger than that of impure salt rock.
PV Power Prediction Based on ABC-FCM Optimized SVM
Authors: Mo Han , Xian Zhaokun , Ruan Baoyang , Huang Guiding 
Published: November 2019

Abstract
The safe operation of photovoltaic (PV) grid-connected requires high accuracy of PV power prediction. Although support vector machine (SVM) has advantages in solving the non-linearity of prediction data, it has many problems, such as slow convergence, easy to fall into local optimal solution, dimension disaster, and the selection of penalty factor c and kernel function width σ, which have a deep impact on prediction accuracy. In this paper, the artificial bee colony(ABC) algorithm combined with fuzzy C-means clustering (FCM) algorithm is proposed to optimize SVM for PV power forecasting. FCM is used to calculate the value of the fuzzy membership degree to mark the normality of the samples to generate the fuzzy samples, Optimizing the selection process of SVM parameters using ABC algorithms. The fuzzy samples are input into SVM optimized by ABC algorithm for training, and finally used for PV power prediction. The experimental results show that the resolvable coefficient is close to 1, the root mean square error and relative error of the predicted results decrease, the prediction accuracy of ABC-FCM SVM has been improved, where can be seen through predicted curve and the optimization ability and fitting ability have also been enhanced. It can provide some scientific reference for the development of PV power prediction technology.
Design and analysis of the hand-held transplanter riding mechanism
Authors: Guang-Hua Lu , Ting-Bo Huang , Yan Liu , Rong-Shan Zhang , Xia Chen , Yao-Qi Shen 
Published: November 2019

Abstract
With the scale and mechanization of agricultural planting, rice transplanter is an important mechanical tool in the agricultural field. This design is based on the hand-held rice transplanter as the prototype, designing the riding mechanism of the rice transplanter, and carrying out finite element analysis and design. It achieved good results.
Study on Power Grid Emergency Optimization Control Based on Wind and Thermal Power Adjustable Capacity
Authors: Li Jun , Yang Peng Wei , Juan Yong Long , Lei Wen Tao , Lin Bo 
Published: November 2019

Abstract
In order to enhance the ability of thermal unit to participate in fault recovery under the large-scale wind power consumption and grid’s power loss, the power grid emergency optimization control method based on wind power and thermal power adjustable capacity is proposed. Based on the analysis of the influencing factors of wind power, considering the matching operating conditions of wind power output, the strategy of unit lockout control under grid over-frequency is proposed. According to the regional control error(ACE) of the power grid, one power emergency control method based on one-key climbing is constructed. The scheme can make full use of the thermal power unit load regulation space and short-term rapid adjustment rate to improve the grid’s ability to cope with large power loss and ensure grid frequency stability.
Coal mill fault diagnosis based on Gaussian process regression
Authors: Zhu Longfei , Liu Shuangbai , Zhang Deli , Qiu Xiaozhi , Zhou Weiqing 
Published: November 2019

Abstract
A typical operating set of equipment can be obtained through cluster analysis of historical data. Two state monitoring models for HP medium speed coal mill are established based on Gaussian process regression and the similarity index calculated by this model can be used for measuring the operating status of HP mills. Finally a method for fault diagnosis of HP mill based on Gaussian regression modelling is proposed combined with fault diagnosis knowledge base of this HP mill. Taking the HP medium speed mill of a 660MW thermal power unit as an example, the real operating data is collected and used for modelling and analysis. Results shows that the equipment parameter estimation calculated by Gaussian process regression is accurate. It can be used for early-warning and diagnosed of equipment fault and also for practical engineering application.
Research on Consumer Classification and Service Quality Satisfaction of Agricultural Products Based on RFM-SERVQUAL Model
Authors: Li Jinjing , Liu Yuming , Zhou Lin , Chen Jiaying 
Published: November 2019

Abstract
At present, the rapid development of e-commerce, effectively identifying the individualized needs of consumers and improving the service experience of consumers is a key factor for e-commerce companies to gain competitive advantage. This paper introduces the RFM model for the first time to study the field of agricultural products e-commerce, and provides new ideas for the consumer segmentation of agricultural products e-commerce platform. Based on the improved SERVQUAL evaluation method, the quality satisfaction of agricultural products online shopping service is studied to explore the agricultural products. Commercial consumers’ personalized service needs to provide practical development strategies.
Manufacturing of Herringbone Gear Model by 3D Printing Assisted Investment Casting
Authors: Ma Changliang , Zhang Yue , Zhang Huanyu , Wu Lin , Yang Li 
Published: November 2019

Abstract
3D printing technology and investment casting are used to manufacturing of a herringbone gear. Four kinds of gating system are designed and the numerical simulation of the four gating systems are executed. It is determined that the optimal casting mode of herringbone gears is the top casting system. Subsequently, the investment mold is made with PLA material by 3D printing technology and the mold shell is made of gypsum. Finally, experiment is performed to verify the validation of the top gating system. The results show that the combination of 3D printing technology and investment casting can effectively improve casting accuracy and production efficiency.
Sandy coast erosion under the conditions of a storm surge combined with a spring tide
Authors: Qian Shi , Aizhi Cai , Hongshuai Qi 
Published: November 2019

Abstract
By comparing the changes of beaches and features in the southeastern coast of Xiamen Island before and after Typhoon No. 9914, the beach cycle and coast erosion processes under the condition of superimposed the spring tide of storm surge were discussed. The study showed that during Typhoon No. 9914, the coastal water level rose to 4.04m above the main sea level (MSL). The storm surge elevation was 1.43m. The stormy waves with 22m/s onshore winds brought overwash onto Huandao Road, up to the main sea level of more than 8.5m, depositing about 8-10cm of beach sands on the road. It caused the beach berm to disappear completely. The sand prism lying in the high tidal zone was scoured. Part of the sand of the prism was washed upward away from the beach, part of which was brought to the low tide zone. The bare shoreface without sand prism was scoured directly by waves and currents. Although the sandy sediment which was brought to the deeper zone by the storm can come back to the shoreface, but the overwash sand could not be returned after the storm, and the prime failed to return to its original condition for a long time, eventually leading to beach erosion and coast retreat.
Effects of seafloor topography on underwater acoustic channel
Authors: Huang Hua , Jin Baogang , Rui Cheng , Liu Juan , Chen Jian 
Published: November 2019

Abstract
Sound wave is the main means of underwater communication at present. Focusing on effects of seafloor topography on underwater acoustic channel, some acoustic propagation models were compared and the BELLHOP method was chosen based on the experiment data of typical seafloor topography. Then the date of OFES model and SOM method were used to get the marine parameters of temperature, salinity, depth and sounding velocity along SS section near Diaoyu Island. At last, the acoustic propagations along the SS section in flat bottom and real seafloor topography were simulated using BELLHOP method. The comparison of acoustic propagation loss was presented. The results show that the BELLHOP method can be used to get authentic results of acoustic propagation under different seafloor topographies, and seafloor topography has a significient effect on acoustic propagation characteritics, which are also influenced by the depth of sound source and sound receiver.
The error analysis of an underwater acoustic short baseline array detection and location system
Authors: Qu Jia-sheng , Qu Yuan-xin , Yang Shan-shan 
Published: November 2019

Abstract
This paper briefly introduces the composition, working principle and the common installation method of the shipborne underwater acoustic short baseline array detection and positioning system. Based on the underwater acoustic direction measurement and location algorithm and the underwater acoustic short baseline array detection and positioning system, the error sources affecting the accuracy of the underwater acoustic direction and positioning are analysed in great detail, and the influence of each error source is quantitatively analysed. In this paper, through theoretical calculation and analysis, the influence factors and the influence degree of the error sources on the direction and location measurement are obtained, the technical indexes of direction measurement accuracy and positioning accuracy of the system are estimated. The results of the error analysis of short baseline array system in this paper provide a theoretical basis for the operation of related underwater acoustic location systems at sea, and has important guiding and practical significance for the underwater target detection and positioning system design.
Numerical simulation and analysis of the sink-stability for the deep-sea walking & swimming robot
Authors: Wei Wei , Wang Xinliang , Zhang Kang , Chen Hong 
Published: November 2019

Abstract
A brief introduction to the design concept of deep-sea walking & swimming robot is provided in this paper. And based on the computational fluid dynamics (CFD) method, a hydrodynamic numerical simulation model for the robot body is established. Then the flow field under different body inclination conditions and different ocean currents is numerically simulated by ANSYS Fluent, and the curves of resistance, lift and pitching moment with inclination are obtained. At the same time, the stability analysis method for deep-sea walking & swimming robot is established by combining dynamic stability margin method (DSM), and the stability of the walking & swimming robot is analysed. The stability of the tilting activity threshold is obtained under different inflow environments.
Exploitation and utilization of marine resources and protection of marine ecology
Authors: Zhong Huiping 
Published: November 2019

Abstract
With the development of society and the gradual enhancement of information science and technology, marine science and technology are gradually strengthened, the marine economy is playing an important part in our national economy. China’s marine Energy Resources Total accumulation is very rich, and it is a great wealth, but the development of marine resources is not unlimited. Although it can promote the development of national economy, the sustainable development of marine resources should be considered. As the marine science and technology are growing today, the sustainability of marine resources is also seriously threatened. This paper analyzes the problems that encountered in the exploitation and utilization of marine resources and also in the protection of marine ecology. After expounding the importance of sustainable development of marine resources, the writer puts forward some methods and suggestions on how to make marine resources develop sustainably.
Detection of phytopathogen and antagonistic fungi on the black diseased-cacao pod
Authors: Zulfitri A , Zulfiana D , Meisyara D , Guswenrivo I , Kartika T , Lestari A S 
Published: November 2019

Abstract
Isolation of phytopahtogen and antagonistic fungi is important in the efforts for managing phytopathogen infestation in cacao plantations. It is related to developing studies to evaluate the association between the two types of organism in the context of establishing integrated pest management to manage widespread pest and disease in cacao crop. This research objective is to study and isolate phytopathogens and antagonistic fungi on cacao. Fungal isolation was conducted from black diseased-cacao pod and soil samples through surface sterilization and serial dilution, respectively. After several culture purification, four fungal isolates were identified through macroscopic colonies and microscope observation. Those fungal isolates are Curvularia, Fusarium, Aspergillus and Trichoderma. Further research is necessary to test their antagonistic and or synergistic associations in laboratory and field scales.
Optimization of application of natural rubber based API adhesive for the production of laminated wood
Authors: Hermiati E , Fatriasari W , Risanto L , Darmawan T , Sari F P , Jayadi  , Sudarmanto  , Laksana R P B , Akbar F 
Published: November 2019

Abstract
The use of natural rubber latex (NRL) for wood adhesive has been identified since a long time ago, even though its adhesion quality is fair. Some modifications of the NRL, as well as the blending of NRL with other commercial wood adhesives, have already been reported. Another potential use of NRL in the wood adhesive formulation is a base polymer of isocyanate type adhesive, which is called aqueous polymer isocyanate (API) adhesive. This study aimed to optimize the aqueous polymer isocyanate (API) type adhesive made from natural rubber latex (NRL) using response surface methodology (RSM). Central composite design (CCD) was used for the RSM. Three factors have been optimized, namely the percentage of crosslinker (7.3-20.7% of the weight of base polymer), glue spread rate (112-298 g/m2), and pressing time (2-22 hours). Results of the study showed that the model generated from the optimization was fit and could be used to predict the relationship between the three factors and the bonding strength. Optimum conditions for the adhesive application for the production of laminated wood used 16.4% crosslinker, glue spread rate of 298 g/m2 with a pressing time of 6 hours. Using these conditions, the shear strength of the laminated wood obtained was 8.8 MPa.
The model of conversation in the ceremonial Marunjuk in Batak Toba: the study of pragmatics
Authors: Siahaan J , Purba A R 
Published: November 2019

Abstract
The research entitled “the model of conversation in the marunjuk ceremony in Batak Toba: the study of pragmatics,” reviews the marhusip, marpudun saut and marunjuk custom. The formulation of the problem in this research is a model of conversation discussed in the marunjuk ceremony in Batak Toba. And how does a conversation mean in the marunjuk ceremony in Batak Toba? The purpose of this research was to know the form of conversation following the language and meaning of the conversation in the custom model marunjuk in Batak Toba. The benefits of this research are to preserve the conversational model of marunjuk ceremony and add a reference as the study of national culture. The method used in this research is a qualitative descriptive method. Data were collected through an obsevation, interview, and literature study. Based on the explanation, this study is about marhusip (discussing the plan of an engagement of the couple) and marpudunsaut or marhata sinamot (negotiating the dowry money of the couple). The custom of marunjuk consists of two parts: 1) dialap jual (party on the woman’s side) and 2) ditaruhon jual (party on the man’s side).