bluuebunny/crossref_metadata_2025_split huggingface dataset:
Technical research of real-time simulation system interface expansion of airborne utility system management
Authors: Liang Zhe , Zhao Jun , Sheng Wang Jian , Wei Han Jia 
Published: April 2020

Abstract
The hardware in the loop is a necessary link during the development of the complex system based on V&V processes. The airborne utility system is featured by numerous types of interfaces, large quantities, and complicated interconnection. During the hardware in the loop test, it is impossible to effectively carry out a large numbers of synchronous simulation, due to the restriction of the simulation equipment resource. This paper proposes an FPGA-based interface expansion technology, and the core idea is to reuse and recombine the signals. The specific steps are as follows: implement the signal reuse algorithm by the FPGA in the interface module, complete the restoration of the recombined signals according to the synchronization signal and the address signal of the system and transmit the control interface command to the device under test. The simulation results show that the real-time simulation system interface expansion technology proposed in this paper can realize the synchronous simulation function of large-scale signal with a small number of simulation channels, and effectively increase the number of interfaces in the real-time simulation system.
Intelligent Diagnosis of Acquisition Equipment Failure Promote “Multi-integration” Application
Authors: Wu Qiutong , Kang Liyan , Cao Bing , Shang Ying , Zhang Muxin , Liu Xinran , Zhou Haishan , Liu Wenyu 
Published: April 2020

Abstract
The information collection system of State Grid Corporation has accessed a large number of smart energy meter, water meter, gas meter and heat meter data, implemented the “multi-integration” collection and construction to improve the public service level of the society, and actively respond to the call for government smart city construction. However, many operating equipment and complex operating environments often generate various equipment failure problems. It is difficult to identify faults and has low efficiency in troubleshooting. The intelligent diagnosis of the collection equipment fault is based on various information such as operation and maintenance, environment, fault analysis and acquisition. It uses big data analysis and artificial intelligence technology to conduct Intelligent Diagnosis Model of Acquisition Fault research, so as to solve the accurate judgment of the failure of the collection device, qualitative analysis of equipment fault and on-site, workflow troubleshooting guidance issues. Using the intelligent diagnosis of faults to solve the problem of “multi-integration” collection and maintenance, it can effectively improve the efficiency of fault handling, better promote the application of “multi-integration” and promote the construction of smart cities.
Fluid-solid Coupling Analysis of the Pressure Expansion of Packers
Authors: Wang Lanwen , Ge Junxu , Sheng Xuanyu 
Published: April 2020

Abstract
For the packers, the pressure expansion process and differential pressure loading process have been simulated by the fluid-solid coupling finite element method. The results show that under the internal pressure load of 10MPa at both ends of the hydraulic oil, the structure of the packer can be fully expanded, and the simulated expansion process is consistent with the actual expansion process of the packer in the test. During the internal pressure loading phase of the hydraulic oil, the internal pressure gradually increases, and the pressure near the ends of the hydraulic oil increases faster. During the pressure difference loading phase of the packer, the internal pressure of the hydraulic oil gradually increases, and the growth curves of different nodes are basically the same. The internal pressure speed and viscosity of the hydraulic oil have a great influence on the internal pressure transmission of the hydraulic oil. After the packer is expanded, the stress at the bell mouth where the rubber tube is in contact with the rubber tube joint is large. When actually designing the packer, this location should consider stress concentration or use a stronger material.
The Failure Evaluation and Reliability Life Prediction Technique of Complex Artillery Equipment
Authors: Wu Dalin , He Jian , Yang Yuliang , Li Yue , Dong Lei 
Published: April 2020

Abstract
To accurately predict and master the actual combat capacity of the weapon system, the paper took a self-propelled artillery as the research subject and built the completely artillery system virtual prototype based on the dynamic theory. Extracted the dynamic characteristics of firepower system, running system and drive system, the performance variation and failure mechanism of the artillery system were studied by using the method of theoretical analysis, simulation and physical experiment. The paper built the fault evaluation and life prediction model in the process of shooting and drivingby combining data fusion, deep learning, etc. The performance evaluation and the prediction of fault of the full artillery system were realized. It can provide references for the life evaluation and prediction of complex equipment system.
Review of Key Technical Principles of Multi-stage Segmented Fracturing Sleeve
Authors: Ma Huiyun , Yu Chenggang , Shuai Chungang , Fu Yukun , Sun Hanwen , Dong Liangliang , Zhu Xiaohua 
Published: April 2020

Abstract
Oil and gas development at home and abroad face the problem of low natural productivity of low permeability reservoirs. As it can effectively improve the recovery rate and reserve utilization rate of low permeability reservoirs, the multi-stage segmented fracturing technology today is one of the important means for the development of unconventional reservoirs. The fracturing sleeve is the core tool of multi-stage segmented technology. Major foreign companies have launched target-specific research and achieved many advanced results. In spite of a latecomer in this field, some domestic experts and scholars have proposed some characteristic techniques and tools. The author of this paper is poised to analyze the key technical principle of domestic and foreign fracturing sleeve and discuss the advantages and applicability of various relevant tools and processes with the purpose of laying a foundation for the development of fracturing sleeves in China.
Research on Burr Formation of Aluminum Alloy Frame of Mobile phone by Milling
Authors: Shi Guocheng , Deng Wenjun , Zhou Zihan , Pang Xueqin 
Published: April 2020

Abstract
The characteristics and mechanism of burr formation in the milling of aluminum alloy mobile phone frame and the influence of cutting conditions on burr formation were studied. The 3D model of milling is established by DEFORM, and the mechanism of burr formation is analyzed. A three-edge end mill with a diameter of 6 mm was used to mill the aluminum alloy 6061 mobile phone frame, and the influence of cutting conditions on burr formation was analyzed. The results show that the burr size decreases with the increase of cutting speed, the decrease of feed speed and the decrease of cutting width. The burr formation is more stable and smaller in the down milling than in the up milling.
Second-order Volterra Filter based on DFP Technique
Authors: Bai Shulin , Xu Jiadong , Zhang Yumei 
Published: April 2020

Abstract
There have some problems caused by selection of improper parameters when LMS, NLMS or RLS algorithms are used to evaluate coefficients of a second-order Volterra filter. We propose a Davidon-Fletcher-Powell-based second-order Volterra filter (DFP-SOVF). The proposed filter is based on a posteriori error assumption and has a variable convergence factor. We give the recursive inverse auto-correlation matrix formulation and present computational complexity analysis. Then applying the proposed DFP-SOVF filter to single step predictions for pure Lorenz chaotic series, prediction results show that the DFP-SOVF filter can guarantee its convergence and stability and there have not divergence problems when using LMS and NLMS algorithms.
Analysis on Design Scheme of Autonomous Ship Cooperative Control
Authors: Jing Mei , Zheng Weigang 
Published: April 2020

Abstract
During this stage, the technology of autonomous ships is becoming more and more mature, which has been widely used in military or civil fields, especially in the field of marine survey. With the gradual maturity of independent ship technology, the advantages of independent ship such as voyage, manufacturing cost and independent control are increasingly prominent.In spite of the rapid development of related technologies of autonomous ships, autonomous ships alone are still unable to compare with autonomous ship formation. Autonomous formation cooperative work can not only effectively improve the phase ratio of operations, but also greatly improve the fault tolerance and maritime adaptability of operations. Therefore, there is only one main ship out to sea in production practice, most of which are several independent ships to achieve specific goals in cooperation [1]. In order to effectively improve the cooperative control of autonomous ship formation under the interference of harsh environment, such as air volume at sea, a design scheme of cooperative control for autonomous ship formation is proposed in this study. The results show that the design scheme can effectively improve the cooperative control ability of formation.
Design of Attitude Loop Controller for Six-Rotor UAV Based on L1 Adaptive Method
Authors: Zhou Wen , Wang Xiaoping , Liu Bo , Liu Jia , Chang Yipeng 
Published: April 2020

Abstract
As for the non-modeling dynamics of the six-rotor UAV during the modeling process, and the presence of uncertain external interferences such as crosswinds during flight, the L1 adaptive control method is used to design the attitude controller of the six-rotor UAV. The force analysis of the six-rotor UAV is performed first to establish a nonlinear dynamic model, and then the nonlinear factors and coupling terms of the model are considered as time-varying parameters and disturbances. The low-pass filter is introduced based on the traditional model reference adaptive algorithm, and the L1 adaptive attitude controller is designed to effectively suppress the high-frequency interference caused by mechanical vibrations of the aircraft. Finally, simulation results show that the algorithm has good dynamic performance and robustness while ensuring system stability.
Transient Flight Controller of Vertical Take-Off and Landing UAV based on Multimode Integrated Design
Authors: Wu Bin , Song Xiaodong , Liu Zhenchang 
Published: April 2020

Abstract
the controller is designed for the vertical take-off and landing mode, the transient flight mode and the fixed wing flight mode, respectively; a control signal fusion method is introduced in the transition flight control mode, which realizes the smooth switching of aerial vehicle in different flight modes; aiming at the problem of the control plane redundancy, the method of advancing amplitude of redundant control quantity is adopted to simplify the control distribution process. It is verified that the control method of Vertical Take-Off and Landing UAV can track the flight path well via six degrees of freedom simulation of the aerial vehicle.
A Novel Design of Mach-Zehnder Modulator Bias Controller Based on Pilot Tone Method
Authors: Jin Yucheng , Shi Xiang , Zang Chunhua , Chen Zilong 
Published: April 2020

Abstract
The Mach-Zehnder (MZ) modulator is a widely-used electro-optic modulator, but its operation point drifts with time and temperature, making the modulation performance worse. Therefore, a bias controller is needed to suppress drift. MZ modulator bias control method based on pilot analysis has good robustness and thus has many practical applications. However, many of the circuit designs based on the pilot method of the MZ modulator bias controller (MBC) are complicated, and the flexibility of the pilot generation is not satisfying. In response to these shortcomings, the paper introduces a new MZ modulator bias controller design. The bias controller uses the internal timer and DAC resources of the MCU to form a DDS generator instead of the traditional external oscillator, which makes the generation of the pilot frequency more flexible, and the signal conditioning circuit is improved. Test results show that the proposed MZ bias controller can achieve an extinction ratio of more than 30dB, and can finish the lock process at the Quad point within 20 seconds.
Simulation and experimental study of mechanicalproperties of a compound water propulsion device
Authors: Dai Zhiguang , Lv Jiangang , Zhang Yu , Liu JinHua , Zhang Zhongzhi 
Published: April 2020

Abstract
The traditional amphibious platform mostly adopts the displacement type boat shape vehicle body, equips the propulsion of two sets of water and land, which has the problems of the complex structure and low speed. Based on the bionic dynamical principle, this paper designed a wheel-blade hybrid propulsion amphibious platform to explore a new structure of amphibious platform with three functions: underwater diving, surface navigation and land driving. Some softwares were used to establish the numerical calculation model of wheel-blade compound propulsion mechanism, and the influence of different parameters on the driving performance was analyzed. The mathematical model of propulsion mechanism based on beam model is established and the impeller strength is checked.
Measurement and Construction of Road Surface Elevation Information based on Kriging model
Authors: Zhu Changjian , Bi Qiushi , Li Wen , Yang Ruipeng , Li Bo 
Published: April 2020

Abstract
In order to study the road digital elevation information of the front road surface, a method in this paper is proposed to measure the road surface model based on kriging model. Firstly, laser lidar is used to obtain the point cloud information of the road ahead of the vehicle. Secondly, extracting the road surface elevation information ahead of the vehicle and combining the point cloud information with the real-time position of the vehicle. Finally, the elevation information of the road surface was simulated by the Kriging agent model. The Kriging model was verified by experiments.
Cyclostationary-based BSS method for time-frequency overlapped BPSK signals in electromagnetic surveillance
Authors: Pang Lihui , Deng Xianrong , Pang Liling , Wang Xinlin 
Published: April 2020

Abstract
A cyclostationary-based blind signal separation (BSS) algorithm is proposed in this paper. The proposed separation algorithm is used for simultaneously received multiple spectrum overlapped BPSK signals in single channel electromagnetic surveillance system. The mixed signal is separated by means of blind adaptive frequency shift (BA-FRESH) filter based on the independent signals’ cyclostationary. This BA-FRESH filtering technique does not require training signals. It can separate the independent signals only by knowing some of their cycle frequencies, which is gained by the second order cycle cumulants in this work. Numerical simulation results proved the effectiveness of this separation method.
Research on Cell Layout of Injection Workshop Based on Improved SLP-G A
Authors: Zhao Man , Wei Xing 
Published: April 2020

Abstract
According to the background of multi-varieties and small-batch market demands, the layout of the injection workshop is reformed by cell layout. The mathematical model of the injection workshop cell layout is constructed to minimum logistics cost, and the model is solved by using MATLAB. By using the systematic layout planning (SLP), three groups of initial solutions are generated, which are used as part of the chromosomes in the initial population of the improved genetic algorithm (GA). In this way the subjectivity and complexity of the traditional SLP method are avoided, the global and local search capability of the algorithm is enhanced, and the optimal solution can be quickly searched. Finally, the cell layout of an injection workshop is completed through the algorithm.
Joint configuration and scheduling optimization of the dual trolley quay crane and AGV for automated container terminal
Authors: Yue Lijun , Fan Houming , Zhai Chunxin 
Published: April 2020

Abstract
This paper proposes a method to optimize the configuration and scheduling of dual trolley quay crane and AGV so as to reduce the cost in automated container terminal. A two-phase model is constructed to minimize cost during handling operation considering the relevant constraints such as laytime allowable in the contract, AGV’s endurance time and buffer platform for quay crane and blocks, which will be solved by the proposed genetic algorithm. Yangshan Phase IV automated container terminal’s data was used to demonstrate the validity and applicability of the proposed model. By the results of the experiments, it is found that the proposed method can reduce cost while ensuring that the completion time is not delayed.
Comparison and Selection of Reconstruction Schemes for Transfer Channels of Zhichun Road Station in Beijing Subway Based on Pedestrian Simulation
Authors: Sun Xili , Yu Shixiao , Wang Ziteng , Wang Aili , Zhao Yuan 
Published: April 2020

Abstract
As the most critical facility of the rail transit station, the transfer channel’s capacity and efficiency greatly affect the operational efficiency and safety of the transfer station. Due to the uncoordinated network planning and the inaccurate prediction of passenger flow, the current capacity of the transfer station at the peak of the transfer station is seriously insufficient. It is necessary to redesign and rebuild the transfer channel to meet the needs of passengers in the peak period. Taking the Zhichun Road Station of Beijing Subway as an example, this paper uses the Vissim pedestrian simulation software to establish different transfer channel reconstruction schemes due to the problems caused by insufficient capacity of the transfer channel. Based on the actual transfer and facility capabilities, comprehensive considerations are made from the transfer time, transfer distance and reconstruction costs to arrive at the best retrofit solution.
CLC number: U291.69
In vitro anthelmintic activity of kersen leaf (Muntingia calabura) infusion against to Haemonchus contortus worm
Authors: Sakti A A , Kustantinah  , Nurcahyo R W , Baliarti E , Suwignyo B 
Published: April 2020

Abstract
The problem caused by the gastrointestinal parasite has caused economic losses in the centres of ruminant livestock throughout the world. Parasitic resistance to synthetic antiparasitic, led researchers to explore alternative herbs as bio-anthelmintic. This study aims to determine the in vitro effect of M. calabura leaf infusion on egg hatchability (EHI) and mortality of adult female H. contortus worms (AWM), as a parameter of the antiparasitic properties of the leaves of the plant. The leaf infusion of M. calabura at doses of 2%, 4% and 6% was used for both treatments and albendazole at a dose of 2 mg/mL was used as a positive control. The negative control was sodium chloride at 0.9% (w/v). The EHI assay was conducted two times, before and 24 h after treatment, while AWM was monitored 15 and 30 min, and 1, 2, 3, 4, 5, 6, 7, and 8 h post test. The result showed that M. calabura leaves contain secondary metabolites, one of which was condensed tannins detected in this study. The leaf infusion of M. calabura at a concentration of 6% significantly inhibited EHI and AWM, higher than the negative control (P<0,05). While, it was not significantly different from albendazole 2 mg/ml on EHI test. The results conclude that the leaf infusion of M. calabura is fully potential as a bioanthelmintic against H. contortus worm.
The growth performance of sheep fed with different wafer feed supplement
Authors: Retnani Y , Barkah N N , Taryati  
Published: April 2020

AbstractProviding wafer feed supplement using ingredients that are easily obtained is one effective way to add nutrients consumed by livestock. This study aimed to evaluate the supplementation of wafer feed supplement derived from lamtoro (Leucaena leucocecphala) leaves, bean sprouts, and morinda (Morinda citrifolia) leaves on sheep growth performance. The research used randomized block design with 4 treatments and 3 groups that were differentiated based on the initial body weight. The treatment given consisted of T0: control feed, T1: control feed + 15% lamtoro leaves wafer, T2: control feed + 15% bean sprouts wafer, T3: control feed + 15% morinda leaves wafer. The sheep were fed forage:concentrate with a ratio of 40:60 for 2 months. The results showed that supplementation of wafer feed supplement significantly increased nutrient intake, daily body weight gain, and increased income over feed cost (IOFC). Supplementation of wafer containing lamtoro leaves provides the highest daily body weight gain and IOFC compared to other treatments. This showed that eventhough there are additional costs for making wafer feed supplement, but this is able to support livestock productivity, so that it can provide greater benefits for farmers.
Functional properties of ripe plantain (Musa
spp) flour from different varieties
Authors: Kumalasari R , Mayasti N K I , Surahman D N , Ekafitri R , Wahyuni A S , Desnilasari D 
Published: April 2020

Abstract
Ripe plantain has potentially become flour with good sensory and easy to digest. This study was carried out to determine the functional properties of five varieties of ripe plantains flour. This research was conducted using a completely randomized design with a single factor, namely a variety of plantains consisting of five levels: V1 = Kapas (Musa corniculata); V2 = Tanduk (Musa corniculata J.De Leureiro); V3 = Siam (Musa paradisiaca var. Moralis M.); V4 = Kepok (Musa paradisiaca var. Bluggoe); V5 = Raja Bulu (Musa sapientum var. Paradisiaca Baker), and each treatment was repeated 3 times. The result showed that the yield and moisture content of plantain flour from the five varieties ranges from 5.88% - 16.19% and 6.71% - 9.51% and kapok flour has significantly different in moisture content and yield compare with other varieties. The water absorption capacity ranges from 2.87-3.03 g/g, was not significantly different among the treatments. The oil absorption capacity ranges from 2.13-2.30 (g/g) and OAC of ripe kapas was significantly different compared with ripe siam flour and ripe raja bulu flour. The swelling capacity ranges from 3.41-4.19 g/g and SC of ripe tanduk flour was significantly different from ripe kepok flour. The solubility ranges from 8.59-29.67% and solubility of ripe kapas, kepok, raja bulu flour was significantly different with ripe tanduk and siam flour. The peak time (6.84-7.00 minutes) and pasting temperature (94.88-95.03°C) were not significantly different among the treatment. The peak viscosity ranges from 169.00-653.00Cp and ripe kapas and raja buluh flour was significantly different from others, it was higher than others. The breakdown viscosity ranges from 22.00-178.00 Cp and ripe tanduk and raja buluh was significantly different from others, it was higher than others. The setback viscosity ranges from 45.00-545.67Cp and ripe kapas flour was significantly different among the treatments with the highest value. Based on the result could be concluded that different varieties could have different or the same functional properties. The used of ripe plantain flour for food production could be based on the functional properties of the flour.