bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis on the Critical Speed of Drilling String in Deep Water without Riser
Authors: Fang Yong , Qian Liqin , He Yuhang , Chen Kun , Huang Zhuang , Zhan Yueming , Wang Xudong , Xia Hongwei 
Published: June 2020

Abstract
According to logging data of the field, while drilling in the deep water without riser, rules of motion and stress distribution of drilling string is really complicated without the constraint of riser because of the comprehensive action of working load, environmental load, movement of platform, whirl of drilling string and so on. Especially with the increase of water depth, the drill string will vibrate severely when the speed reaches the critical value, which easily causes the dynamic failure of the drill string. Based on rotor dynamics theory, this paper has established the mechanics calculation model of nonlinear support drill string without riser to analyze the influences of bearing stiffness, water depth and section size of drill string on critical speed of drilling string. The result shows that critical speed of whirl of drilling string is decreased with the increase of wall thickness; critical speed of whirl of drilling string is decreased with the increase of the length of string in water; critical speed of whirl of drilling string is increased with the increase of the stiffness of bearing. According to the results, reasonable speed of drilling string has been given to prevent resonance. The results can be used as reference for deepwater drilling operations without riser.
Optimization of aerobic composting process of Camallia oleifera Seed Cake and its fertilizer efficiency
Authors: Hu Hualin , Li Guanqiang , Song Junrong , Wei Fuxiao , Sun Chao , Wang Hong 
Published: June 2020

Abstract
[Objective] In order to promote the development of camellia oil processing enterprises and solve the problem of waste of camellia oil enterprises, Camallia oleifera cake that tea saponin has been removed was composted to form organic fertilizer. [Method] The D-optimal mixture design method was utilized and the seed germinate rate was defined as evaluation index. The optimized formula was obtained by establishing regression equation and response surface optimization analysis based on single factor experiments. [Results] Under the condition that fermentation bacteria agent was 1% of the mixture, the best composting process was: 74.8% of remove tea saponin of Camallia oleifera cake (dry), 12.5% of pig manure (dry), 8.0% of straw and 4.7% of rice husk. Its seed germination rate predicted value was 150.56%, which was basically consistent with the measured value 151.23%; Its total nutrient content was 5.17%, which was up to organic fertilizer standard (NY525-2012). [Conclusion] The optimized formula can be used as composting process of Camallia oleifera cake, which has good repeatability, and provide scientific basis for rational utilization of Camallia oleifera cake and development of organic fertilizer.
Isotope Geochemistry of the Shimensi Deposit, Northern Jiangxi and Its Analysis
Authors: Ye Zhanghuang , Wang Peng 
Published: June 2020

Abstract
The Shimensi deposit is located in the Lower Yangtze metallogenic province. It is a recently-discovered world-class tungsten-polymetallic deposit, accompanied by Cu and Mo. The orebodies are thick with gentle dipping, mainly distributed along the contact zone between the Cretaceous porphyritic biotite granite and the Neoproterozoic biotite granodiorite. The mineralization was closely linked with the zoned hydrothermal alteration, including silicification, greisenization, chloritization, carbonatization and K-feldsparization. Based on ore geology and C, H, O isotope, this paper has studied the origin and evolution of the ore-forming fluids. The δ13CV-PDB values of calcite range from -10.26‰ to -3.26‰, with an average of -7.3‰, indicating that hydrothermal fluids from which calcites precipitated were derived from the granitic magma. The H and O isotopic compositions of the quartz veins (δ18DSMOW=- 106‰ to -86‰, δ18
OSMOW(H2O)=2.2‰ to 4.5‰) suggest that the ore-forming fluids mainly had a magmatic-hydrothermal origin, but to some extents, mixed with meteoric water. The subduction of the Paleo-Pacific Plate beneath the Eurasian Plate resulted in lithospheric thickening and subsequent delamination, and the main N-S stress field in East China changed progressively to an E-W orientation during 170-135Ma. Maximal lithospheric thinning happened in the Late Mesozoic, which led to the direct contact between the crust and asthenospheric mantle. Consequently the heating from the asthenosphere on the crust trigged and widespread development of extensional structures, the intensive magmatism and mineralization in eastern China in Mesozoic. The isotopic chemistry indicates that the ore mineralization in the Shimensi deposit was closely linked with Early Cretaceous magmatism in East China.
Research on the Algorithm of Online Route Re-planning for UAV Formation
Authors: Bi Tianshu , Ye Ping , Xu Yunong 
Published: June 2020

Abstract
In order to solve the real-time and robust problem of online flight path re-planning when UAV encounters new threat sources in the course of navigation, an online flight route re-planning algorithm based on sparse A* algorithm is proposed. Based on the threat model of UAV, the online route re-planning strategy is analyzed. When the UAV detects a new threat in the course of navigation, according to the current position of the UAV formation and the position of the threat source, a route that can safely bypass the threat source is quickly re-planned. In order to meet the requirements of real-time and robustness, the node expansion and update strategy of the improved sparse A* algorithm and the hierarchical planning combined with the size step size are adopted. The simulation system of UAV formation navigation is established to verify the process of online route re-planning. The number of expansion nodes and convergence time of algorithm before and after the improvement are compared, and the track accuracy of fine planning based on rough planning is compared. The experimental results show that the improved algorithm can speed up the search speed and meet the real-time requirements of online route re-planning.
Analysis and Simulation of Spiral Waste Plastic Electromagnetic Cracking Reactor
Authors: Li Zhihua , Song Yingshuai , Zhao Xianbing , Hu Lihao , Su Xin 
Published: June 2020

Abstract
Domestic garbage contains a lot of waste plastic. Due to the stable physical and chemical structure, it may not be decomposed in the natural environment for tens to hundreds of years, so the waste plastics cause serious pollution and harm to the environment. Using electromagnetic heating technology and double-helical propulsion structure, Continuous and efficient cracking of waste plastics rector can produce useful oil, cracking gas and carbon black to achieve the purpose of high value recycling of waste plastics.
Research on Stock Prediction Model Based on Deep Learning
Authors: Zhang Haiying , Liang Qiaomei , Li Siheng , Wang Rongqi , Wu Qingqiang 
Published: June 2020

Abstract
In order to obtain stable returns, this paper aims to establish a quantitative model with higher prediction accuracy. According to the time series characteristics of financial data, the prediction model with financial time series data is constructed by using the time-memory sequence model LSTM, which is applied to the representative SSE 50 series stocks. And based on this, the LSTM model with Encoder-Decoder mode and a hybridized framework of LSTM with CNN are built to improve the original model. Feature extraction is performed on the input data by using CNN, and then as an input to the LSTM, the extracted features are used for sequence prediction with the LSTM model.
Construction of Life Cycle Assessment Model of Carbon Emission in Hui Cultural Tourism Destination——Taking Huangshan City as an Example
Authors: Mi Xue , Zhao Lei , Ding Nan 
Published: June 2020

Abstract
Tourists travel behaviours generate tourism waste, consume carbon energy, and emit carbon dioxide. To estimate and evaluate the carbon emissions and ecological environment of tourism destinations can provide data support for local tourism sustainable development programs. Considering the characteristics of the integration of Huangshan City’s Hui culture and ecological environment, a life cycle assessment model of carbon emissions from Hui culture tourism destinations is established. According to the model, this paper proposes that increasing more activities in the scenic spot, managing carbon emission of enterprises related to scenic spot, and promoting the concept of green consumption.
Study on Functional Components of Functional Food Based on Food Vitamins
Authors: Xiao Surong , Li Jingdong 
Published: June 2020

Abstract
The research and development of functional food ingredients of food vitamins are gradually moving towards serialization, nutrition, functionalization and standardization, and more and more high-tech applications in this area. In addition to rich basic nutrients (i.e. proteins, fats, sugars, vitamins and minerals), food also contains a wide range of bioactive substances, such as polyphenol compounds, organic sulfur compounds, phytoestrogen terpenoids, etc. At present, the research on functional ingredients of these food sources has become a hot research field in the international academic circle. This paper discusses the meaning of functional foods and their functional ingredients, and expounds the synthesis and extraction of vitamin E. At the same time, the function of compound food fiber in functional food was introduced.
Research on the Effect of Glutamine Transaminase on the Gel Properties of Mutton
Authors: Guo Yanan 
Published: June 2020

Abstract
Glutamine transaminase is an enzyme that can catalyse the formation of valence bonds between the ε-amino group of lysine and the γ-hydroxylamide group of glutamic acid, resulting in the polymerization of chime. In this paper, the sources, properties, mechanism of action and application of glutamine transaminase in lamb meat processing are described in combination with existing literatures. The bioavailability of its products is discussed. The results show that: glutamine transaminase, treatment the effects of temperature and reaction time on the cooking loss rate and characteristics of mutton gel are significant. The effects of glutamine transaminase, processing temperature and gellan gum on the properties of mutton gel are significant (P <0.05); temperature on glutamine transaminase There was significant interaction effect on the gel properties of mutton emulsion (P <0.05), but each factor had no significant interaction effect on the gel properties.
The Comprehensive Evaluation Method of the Human Factors in the Flight Deck Based on the Physical and Behaviour Measurements
Authors: Zhang Jiong , Wang Zhen , Lu Yanyu 
Published: June 2020

Abstract
There is increasing concern about the design and evaluation of the human factors in the flight deck. The study was to propose a comprehensive evaluation method of the human factors in the flight deck, combing with multiple physiological signals. The proposed comprehensive evaluation method in the flight deck are composed with the evaluation of the operators’ cognition, operational performance, control activities and workload. The cardiovascular signal, eye movement and flight parameters were recorded during task to conduct the evaluation. An experiment about the evaluation of the display elements in the flight deck was conducted to verify the proposed comprehensive method of the human factors. The results revealed the validity of the proposed method, which can give a detailed description of the operator’s workload, operational performance and cognition during the flight task.
Magnetic Drug-loaded Microcapsules Intergrating Photo thermal and Targeted Therapy
Authors: Han Yu , Gao Ying , Shan Xiaoqian 
Published: June 2020

Abstract
Compared with single chemotherapy, collaborative treatment can significantly improve the cure rate of malignant tumors, reduce the use of chemotherapy drugs and avoid the damage to the organs. The combination of Photo thermal therapy and chemotherapy has also become the most common treatment in recent years. In this article, we synthesized a kind of mesoporous silica with a large specific surface area and pore volume to encapsulate the Fe3O4 nanoparticles. Owing to the unique magnetic and photo thermal properties of Fe3O4 nanoparticles, the combination of PTT- chemo targeted therapy has been achieved and greatly reduces the side effects of the drugs on the human body. This novel particle will create a broader application in the future.
Research on the Value of the Basic Principles of Marxism Based on Constructivism in the New Period
Authors: Ge Chuanguang 
Published: June 2020

Abstract
Marxism is the product of the times, which originates from profound economic and social roots, ideological sources and practical basis. The practical, revolutionary, scientific and open features of Marxism determine its timeless value. Today’s adherence to and development of Marxism in China are the mission of the Party, the needs of the country’s development and the expectations of the people’s life. Based on constructivism, this paper analyzes the connotation of the basic principles of Marxism, fully understands its development significance, and analyzes the value of Marxism in the new era from several aspects.
Design of Fault Diagnosis System Based on Fuzzy Inference for a New Type Equipment
Authors: Wang Xin , Cui He , Ji Lu , Li Yun 
Published: June 2020

Abstract
Aimed at the puzzle of non-bijection between cause and symptom of the fault for a new type equipment system, the paper built the mathematical model of fuzzy inference by means of inference mecha- nism of fuzzy relation. In the paper, it designed the overall scheme of fault diagnosis system, and realized the function of system fault diagnosis by means of VC + + programming language according to the diagnosis flow of system. Through actual example validation, it shows that it satisfies the accuracy of fault diagnosis for a new type equipment system. The fault diagnosis of weapon equipment has always been an important topic for military research. With the change of war mode, higher requirements have been put forward for weapon equipment support technology. A new type of equipment is widely used in the land war, so some faults also appear one after another. In the long-term research, it is found that there is a fuzzy relationship between these fault phenomena and the causes. A fault does not correspond to a fault cause in modern mathematics, fuzzy mathematics can clarify the relationship between fault symptoms and fault causes in the equipment system. In this paper, the fuzzy fault diagnosis method is used to build a general fault diagnosis system to realize the fast and accurate analysis and diagnosis of faults.
Numerical Study of Hydrodynamic Performance of a Hydrofoil with Vibration Trailing Edge
Authors: Xu Yingbo , Tang Denghai 
Published: June 2020

AbstractIn order to study the influence of trailing edge vibration to the hydrodynamic performance of hydrofoil, the large eddy simulation and moving wall boundary condition methods were used to simulate the flow field of NACA66-mod hydrofoil with different trailing edge vibration amplitude(VA) and frequency. First, the numerical simulation methods are verified by comparing with experimental data. Then the flow field of hydrofoil was simulated to study the influence of vibration frequency and amplitude to hydrodynamic performance. The result shows that the vibration amplitude and frequency has significantly influence on the trailing edge vortex shedding. The intensity of the vortex increases rapidly with the vibration amplitude increasing. The lift and drag coefficients are influenced by the vibration amplitude and frequency.
Rating-Based Collaborative Filtering Using Spectral Clustering Algorithm
Authors: Yan Yongjie , Xie Hui , Ma Li 
Published: June 2020

Abstract
Clustering analysis has been an important area of machine learning and data mining research, it can help us know the connection between things more clearly. In recent years, the research of spectral clustering algorithm has been a new and efficient clustering analysis algorithm. In this paper, the sparsity and the real-time problem of traditional recommendation algorithms, a new recommendation algorithm based on spectral clustering is proposed. The spectral clustering process can improve the efficiency of spectral clustering algorithm. Spectral clustering can be performed offline, which will accelerate the speed of online recommendation. The experimental results on Movie lens show that the new algorithm improves recommendation quality in MAE and coverage.
Isolation and Characterization of Lipid-Producing Bacillus sp. TC14
Authors: Zheng Chaocheng 
Published: June 2020

Abstract
In order to obtain microbes producing microbial oil from environment, a strain, marked as TC14 was isolated by replica plating and Sudan Black staining on the selected media. Its colony is smooth; milk white, slightly transparent, round edge, sticky. Its cell is long-rod, G-, intracellular lipid granule. The results of physiological and biochemical research: catalase, denitrification and fluorescent pigment tests are negative; metachromatic granule staining, amylolysis, lecithinase tests are positive. According to its sequencing result of 16S rDNA, strain TC14 is classified and belonged to Bacillus, namely sp. TC14. The optimum inoculation temperature is 35°C and the most suitable initial pH value is 10. The intracellular lipid of strain TC14 is extracted by the way of hydrochloric acid hydrolysis and the calculated ratio of oil-production is 5.08%.
Characteristics of Splash Formed by the Impact of Liquid Jet on a Thin Liquid Film
Authors: Kang Tianyu , Qin Qin , Yao Xin , Yu Qingbo 
Published: June 2020

AbstractFor rotary cup granulation, the splash may occur during liquid slag falls onto the cup, which increases the risk of operation. By performing experiments for three liquids with different properties, including water, 95% ethanol and 30% glycerol-water solution, the characteristics of splash formed by the impact of liquid jet on a thin liquid film were studied. The experimental results showed that increasing the impact velocity and diameter leaded to intense splash, while increasing the viscosity and the surface tension reduced the scale of the splash.
Preparation and Performance of Binary Copper-Cobalt Based Catalyst Used for Low Temperature Selective Catalytic Reduction of NOX
Authors: Yang Hezhi , Li Zhiyuan , Tao Yong , Shang Xiangjing , Yu Qingbo 
Published: June 2020

Abstract
Low-temperature urea-SCR technology is a new type of low temperature denitration technology, which could achieve the removal of NOX in low temperature (50–100°C) flue gas, and avoid the ammonia escape problem of traditional NH3-SCR technology. In this paper, a series of binary Cu-Co based composite catalysts with different Cu-Co loading ratios (0.1: 0.9–0.9: 0.1) were prepared at calcination temperatures of 300–600°C, and their preparation parameters were optimized. The experimental results showed that when the calcination temperature was 500°C and the Cu-Co loading ratio was 0.9: 0.1, the Cu-Co-based binary catalyst had the highest low-temperature denitration performance. Finally, the XRD analysis of the phase composition for the Cu0.9Co0.1/NUAC catalyst was carried out in this paper.
Analysis of bioactive compounds and antioxidant capacities in different varieties of carrots
Authors: Ma Jie , Chen Chunyan , Ma Jun , Ma Wei , Yang Jiao 
Published: June 2020

Abstract
In this study, twelve varieties of carrots with five colors were evaluated for their levels of bioactive compounds and antioxidant capacities. Bioactive compound contents and antioxidant capacity levels were significantly different among distinct varieties. In detail, ascorbic acid contents ranged from 0.30 mg g−1DW to 0.63 mg g−1 DW, carotenoid contents ranged from 0.06 mg g−1DW to 0.54 mg g−1DW, anthocyanin contents ranged from 0.03 mg g−1DW to 6.18 mg g−1DW, proanthocyanidin contents ranged from 0.36 mg g−1DW to 1.34 mg g−1DW, flavonoid contents ranged from 1.07 mg g−1DW to 6.01 mg g−1DW, total phenolics contents ranged from 7.25 mg g−1DW to 33.25 mg g−1DW, FRAP levels ranged from 0.02 mg g−1 DW to 0.16 mg g−1DW, and ABTS levels ranged from 23.13% to 75.97%. Moreover, the highest contents of anthocyanin, proanthocyanidin, flavonoid, and total phenolics, as well as antioxidant capacity levels, all were in Tianzi (purple). While the highest contents of ascorbic acid and carotenoid were in Zishenghuang (yellow) and Zishengzi (purple with orange core), respectively. This information could be a valuable asset in the research and extension of carrots.
The Effect of Journal Misalignment on the Lubrication Performance of Partially Textured Journal Bearing with Elastic Deformation
Authors: Song Xintao , Wu Wei 
Published: June 2020

Abstract
In order to analyse the effects of journal misalignment and elastic deformation on the lubrication performance of partially textured journal bearing, an elastic-hydrodynamic lubrication (EHL) model was specifically established based on the steady-state Reynolds equation. Through numerical calculation, the effects of elastic deformation, degree of misalignment and misalignment angle on load capacity and overturning moment were investigated. The results show that when the degree of misalignment is large, the elastic deformation cannot be ignored. With the increase of degree of misalignment, the load capacity and overturning moment are increased. With the increase of misalignment angle, the bearing performance variations are complicated. When the misalignment angle is equal to 90°, there are two pressure peaks in the film pressure. The load capacity is the lowest, and overturning moment is the largest. The optimized partial texturing is still beneficial to the performances of bearing when journal becomes misaligned, which is attributed to the additional hydrodynamic lift.
Design and Control of Pneumatic Muscle-Driven Robot Arm Based on Bilateral Rehabilitation Training
Authors: Jiang Chi 
Published: June 2020

Abstract
As a new treatment method, the upper limb rehabilitation training robot can help stroke hemiplegic patients recover their upper limb motor function by providing repetitive exercises and other ways. In this paper, based on the background of bilateral rehabilitation training with pneumatic muscle-driven robot arm containing paw system, the key technology of benevolence is systematically studied, and a set of experimental system is designed to verify the research results in detail. The mechanism design of the humanoid multi-joint double-arm is completed by imitating the human arm. Pneumatic artificial muscles are used to drive the shoulder and elbow joints of the mechanical arm, and stepping motors are used to drive auxiliary motion joints. The designed mechanical arm has both flexibility and compactness in structure. This study provides a useful reference for improving the effectiveness of arm design of upper limb rehabilitation pneumatic muscle-driven robot, and is helpful to broaden the research ideas of upper limb rehabilitation robot.