bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Effect of the Applied Temperature on the Maximum Refleactive Wavelength in Chiral Liquid Crystal Polymers
Authors: Wang Jianwen , Yang Junlin , Han Jinghui 
Published: December 2019

Abstract
The liqud crystals (LCs) monomers 4-(Undecenoic-1-yloxybenzoyloxy)-4’-cyanobenzene e M1 and 5-{4-[4-(4-undecyloxy) biphenyl] -oxycarbonyl} pentanoic acid cholesteryl ester M2 are synthesized. The liquid crystals polymer was synthesized by nematic and chiral LC monomers. The property of the LC materials are detected by POM and DSC. The bandgaps of the LC polymer are influenced by the change of temperature. The effect of temperature on the reflective wavelength is decreased from 513nm to 394nm with temperature increased. The chiral LC polymer is a one dimension photonic materials. The optical and thermal property of the CLCs polymer is controlled by the out field, and widely used for display, smart windows and chiral liquid crystal laser etc.
Application of Real Option Theory to Mergers and Acquisitions (M&A) in the Pharmaceutical Industry
Authors: Teng Tao 
Published: December 2019

Abstract
As for the mergers and acquisitions (M & A) in the pharmaceutical industry, the patent technology is one of the core values of the enterprise. However, according to the international evaluation criteria, but there are differences over the valuation strategies on the patent technology. Currently, the valuation methods used in the market are mainly cost method, market method and income method. When it comes to the uncertainty and continuity of the M & A, the real option theory can correct the valuation by late adjustment. This paper tends to interpret the real option theory through the simulation of BSM model and binary tree model, and to interpret the application of the gambling agreement to the actual operation of M & A.
Stress-strain State in Elastic Phase in Ni3Al superalloy with soft interlayer
Authors: Li Qi , Liu FengMei , Yue Xiong , Xiong Ming , Yi Yaoyong 
Published: December 2019

Abstract
In this study, the stress-strain State in elastic phase of cylinder-cylinder joint in Ni3Al superalloy with “soft” elastic modulus ratios was investigated by computer simulation. To establish the general patterns of SSS formation when loading cylindrical nodes with interlayers of “soft” rigidity and checking the adequacy of the simulation, three load cases were calculated: -5 (var.1), -20 (var.2) and -40 (var.3) MPa. The result shows that regardless of the magnitude of the axial load (in all load cases) in the nodes, with “soft” interlayers, the width of the zone of volumetric SSS in the main material is commensurable with the thickness of the interlayer, the length from the external surface of the node is not more than 5∼10 thickness of the interlayer; the nature of the SSS in the elastic stage of the material is completely only the level of stresses is directly proportional to the magnitude of the external load. This corresponds to the general laws of mechanics and confirms the adequacy of the results of computer simulation.
The influence of welding speed on friction stir welded of duplex stainless steel
Authors: Jia Zhongxue , Zhao Yunqiang , Dong Chunlin , Miao Shu , Wang Chungui , Yi Yaoyong 
Published: December 2019

Abstract
Friction stir welding of 4 mm thick 2205 duplex stainless steel was carried out. When the welding speed is low, the well-formed joint without defects can be obtained. When the welding speed is reach 70 mm/min, the hole defect occurs in the bottom of the joint. After recrystallization, fine equiaxed crystals are formed in the stirred zone. The ferrite content in the whole joint is in the range of 48 to 60%, and the ferrite content in the stirred zone decreases with the increase of welding speed. With the increase of welding speed, the hardness and tensile strength of the stirred zone increase. When the welding speed is 50 mm/min, the joint performance reaches the optimal level. The tensile strength is 824 MPa, 97.3% of the base material.
Quantitative Determination of Total Flavonoids from Polygonatum Sibiricum by Spectrophotometry
Authors: jia Guangtao , Zhao Hanqing , Hou Dianhai , Sun Tongyi , Lin Weiping 
Published: December 2019

Abstract
Objective: This study aims to establish a spectrophotometry method to determine the content of total flavones from Polygonatum sibiricum. Methods: Rutin was used as the control substance. After the color reaction of Al (NO3) 3-NaNO2-NaOH system, the maximum absorption wavelength was determined and the standard curve was drawn. Then the reliability of the method was verified by precision test, repeatability test, stability test and recovery test. Results: The maximum absorption wavelength of rutin is 510 nm, the standard curve is Y=10.232X-0.0047, R2=0.9991, and the linear fitting degree is high. Precision test Rsd = 1.02%, repeatability test Rsd = 2.79%, stability test Rsd = 2.25%, recovery test Rsd = 1.44%. It can meet experimental requirements.
In Vitro Antibacterial Effect and Sensitization Evaluation of Tea-Tree Oil Preparation
Authors: Li Yuejuan , Fang Ziyang , Zhu Hui , Yang Li , Liu Hailong 
Published: December 2019

Abstract
In order to promote the development and utilization of tea tree oil in china, The tea tree oil which was extracted from terpinen-4-ol typed Melaleuca alternifolia introduced and selected by Guangxi Forestry Science Institute, was tested in antibacterial activity, local irritation and sensitization research. The results demonstrated that the tea tree oil preparation to the selected staphylococcus aureus, epidermis staphylococcus aureus, escherich-ia coli, pseudomonas aeruginosa and candida albicans has good antibacterial activity. There were no irritating reations observed in the dermal irritation test in rabbits and 0.5% tea tree oil has no sensitization in guinea pigs. This study confirms that tea tree oil has significant antibacterial activity, low -irritating and hypo-allergenic properties, promising a broad development value.
Tribological Behaviour of POM Reinforced By Graphene and PTFE
Authors: Zhang Xiaoyang , Chen Wei , Du Hongda 
Published: December 2019

Abstract
Graphene/polytetrafluoroethylene (PTFE)/polyoxymethylene (POM) composites were successfully prepared by high speed mixer and injection molding machine. As a consequence, graphene and PTFE covered at the surface of the POM powder evenly and the tribological performance of the composites is enhanced remarkably, especially the graphene content is 0.2%. In addition, the friction and wear behaviour of the composites is connection to the content of graphene, both of them will decrease at first and increase with the adding of graphene. In a word, this proposed method is simple and effective for mass production of graphene/PTFE/POM composites, and it is promising to be applied to fabricate many kinds of nanofillers modified POM composites.
A Pilot Study of Upcycling Methods for Fabrics of Sustainable Fashion
Authors: Chao Huang 
Published: December 2019

Abstract
In recent years, with the improvement of people’s environmental protection concepts, sustainable fashion has achieved better development in clothing and related industries. From spinning, weaving, dyeing and finishing to the fashion design, garment making, retail, use and disposal of the whole life cycle og clothing, effective actions can be taken to reduce energy and material consumption and reduce environmental pollution, to achieve sustainable fashion. This research focused on the upcycling methods of fabric materials. By means of inovation methods such as three-dimensional space reconstruction, fabric texture redefinition, and this study tried to establish an upcycling system for fabrics and materials, to promote the status of sustainable fashion and reduce the impact of fashion industry on the environment.
Derivation of Modified Input Estimation Filter Using Bayesian Framework
Authors: Bao Zhichao , Jiang Qiuxi , Ao Qi , Chen Qiuju 
Published: December 2019

Abstract
A new approach to derive the modified input estimation is proposed using Bayesian framework. Tracking manoeuvring targets is a tough problem and many algorithms are proposed to deal with it. Among these algorithms, modified input estimation (MIE) technique has been proved to be an effective method. MIE technique treats acceleration as additive input term in the state vector and estimates the original state and acceleration vectors simultaneously with a standard Kalman filter. Analogous to standard Kalman filter, however, the MIE filter equations which have a modification on Kalman gain is given without a cohesive derivation. Using a Bayesian framework, we will present a conceptually cohesive roadmap that starts at first principles and leads directly to derivation of MIE filter equations.
Performance Analysis of OFDM and FBMC
Authors: Hu Jingying , Yang Jiajia , Chuan Yingdong , Li Erlei 
Published: December 2019

Abstract
The purpose of this article is to compare the proposed 5G modulation techniques FBMC against OFDM which is the modulation technique used in 4G communications. In this article, we compare Spectral Density, Spectral Efficiency, PAPR, BER of FBMC and OFDM modulation techniques to analyze the merits of them. The simulation results show that FBMC has the lower BER, higher PAPR, greater Spectral Efficiency (if the burst is larger) and better performance of Spectral Density compared to OFDM modulation.
Four-Rotor UAV Safe Landing Risk Assessment Method
Authors: Lv Zhenhao , Huo Lin , Shen Mingfa 
Published: December 2019

Abstract
The recycling of quadrotor drones is a very important process in the execution of the mission. Traditional navigation devices such as GPS and inertial navigation are limited in many casesComplete the safety landing assessment of the four-rotor UAV. The main work is as follows: First Find relevant information to understand the development history of the four-rotor UAV and the risk of the safe landing of the four-rotor UAV and the factors affecting the landing of the four-rotor UAV, and Analyze the structure, flight principle and operation mode of the quadrotor UAV, establish the ground coordinate system and the fuselage coordinate system.Then Propose he conditions that the four-rotor UAV can land safely and the safety landing assessment method of the quadrotor UAV, and obtain the probability formula for the safe landing of the quadrotor UAV. Designing the ground environment of the landing surface of the quadrotor UAV, simulation experiments, and the probability that the four-rotor UAV will land safely in this environment.
Application and Benefit Calculation of Waste Heat Recovery of Power Plant Boiler
Authors: Wang Sen , Zhang Yingtian , Gan Zhiyong , Zhou Liansheng , Hu Qingbo , Wang Guilin , Zhou Yigang , Zhang Changzhi 
Published: December 2019

Abstract
In the boiler combustion of power plants, the smoke loss is the main combustion heat loss of the boiler. Reducing the exhaust gas temperature is one of the main means to reduce the heat loss of the exhaust gas, and it is also the main measure for improving the thermal efficiency of the boiler in each power plant. This paper summarizes and discusses the application and economics of installing composite phase change heat exchangers for coal-fired boilers.
Data Products Pricing Mechanism: A Harmonious and Mutual-beneficial Perspective
Authors: Xiong Li , Zheng Huixian 
Published: December 2019

Abstract
Data as a new production material has great potential value, and its value is reflected after the utility generated. So it is difficult to set prices for data products. This paper analyzes the characteristics of data products, builds a data product pricing model from a harmonious and mutual-beneficial perspective, and verifies the operability of the model in the simulation pricing strategy. The results of this research can help the construction and development of the data transaction market, and provide ideas for future research on data pricing.
Mathematical Modeling of Evaporator in Reheat Recovery Drum Boiler
Authors: Zhang Tianyu , Zhang Xin , Zhao Zhenning 
Published: December 2019

Abstract
The reheat recovery boiler is widely-used energy conservation equipment aiming to take advantage of the exit flue of gas turbine in combined cycle. Due to large amount of renewable energy getting access to grid, a more flexible and agile operation mode of reheat recovery boiler is in great need, and parameter distribution is arousing great attention of researchers. In present paper, a mathematical model of downcomer-riser-drum is established based on conversation equations. Four typical working condition of heat recovery boiler are studied, and detailed information is demonstrated.
Design of base station backup power system constructed with ladder battery
Authors: Yan Zijin 
Published: December 2019

Abstract
With the vigorous development of new energy technologies, the scale of the electric vehicle market continues to grow, and the number of electric vehicles has risen sharply. The problem that comes with it is that a large number of decommissioned power batteries are in urgent need of treatment. The power battery that has been retired from the whole vehicle still has objective capacity and large utilization value. Finding a suitable way to use the ladder is a commonly accepted treatment method. The communication base station backup power supply has a huge demand for energy storage batteries, which is in line with the characteristics of large-scale use of the battery by the ladder, and has become one of the main application fields of the battery. In view of the characteristics of the base station backup power system, this paper proposes a design scheme for the low-cost transformation of the decommissioned stepped power battery before use in the communication base station backup power system.
Design of Solar Mobile Power with Industry Patent Analysis
Authors: Yan Zijin 
Published: December 2019

Abstract
Patent data shows that mobile power supplies are in urgent need of new technology solutions. Aiming at the demand and problems of mobile power, this paper proposes a safe, reliable and high-power solar mobile power supply design. The use of a folding solar panel can provide power for portable devices such as mobile phones, and has practical value. This design can improve the charging quality of mobile electronic devices.
Research on the Influence of Thermal Performance of Steam Turbine on Energy Loss and Heat Rate
Authors: Sun Yu , Han Xuhui 
Published: December 2019

Abstract
A steam turbine as research object in this paper, and the thermodynamic calculation program of steam turbine and thermal system was programmed, and the influence of thermal performance change of flow passage component on the heat rate was analyzed. The results show that the efficiency of the unit is linear with the heat rate; the greater the power of the unit, the closer to the exhaust end, then the influence of unit efficiency change on heat rate is also greater. The effect of the turbine efficiency change on the heat rate was analyzed in this paper based on the heat rate change relation model; the calculation results were basically consistent with the thermal calculation, it shows that this mathematical model has high calculation accuracy and it is properly applied into engineering calculation.
Research on Faults and Maintenance Methods of Steam Turbine in Thermal Power Plant
Authors: Sun Yu , Han Xuhui 
Published: December 2019

Abstract
The steam turbine is one of the most critical equipment in the power generation system of thermal power plants, its daily operation condition and maintenance work will directly affect whether the power generation system can operate safely and stably. Therefore, it is necessary to strengthen the management of the steam turbine, ensure the continuous and full operation of the steam turbine unit, and ensure the power transmission of the power grid. However, some faults unavoidably appear in the steam turbine in the long-term operation, if these faults are not handled in time and effectively, the influence scope of the fault will be expanded, which causes the turbine to fail to operate normally and affect the normal work of thermal power plants. This paper analyses the common faults of steam turbine in thermal power plants, and further studies the maintenance methods for common faults of steam turbine in thermal power plants.
Polarization Image Registration Algorithm Based on Improved SIFT Descriptor
Authors: Wang Xiaodan , Yang Xu , Qin Chuanyi 
Published: December 2019

Abstract
With the application of polarization imaging technology more and more widely the research on how to obtain polarization information quickly and efficiently has always been the focus of people’s attention. In view of the numerous edge points generated by DoG (Difference of Gaussian) in the process of feature point extraction by SIFT(Scale-invariant Feature Transform) algorithm, which leads to tedious and time-consuming operation, an improved Sobel algorithm combined with SIFT operator image registration algorithm is proposed in this paper. The concrete implementation steps are as follows: firstly, the traditional two-direction Sobel algorithm is supplemented to eight directions, and then edge points are extracted. Then SIFT algorithm is used to detect feature points. Then, the feature points belonging to edge points are eliminated by Sobel operator. This method reduces the number of matching cycles. The processing results of RGB image and polarization image with this algorithm are compared with those of traditional SIFT algorithm, and the time consumption in the registration process is reduced by 60.5% on the premise of ensuring the accuracy.
Research on Improved Somatosensory Simulation Algorithm Based on VR Motion Simulator
Authors: Jiang Yuhao 
Published: December 2019

Abstract
Aiming at the problem that the classical somatosensory simulation control algorithm used in VR (Virtual Reality) motion simulator has the shortcomings of phase delay and false hint, which leads to insufficient consistency of virtual and real motion and causes VR motion sickness, an improved somatosensory simulation algorithm is proposed. The improved somatosensory simulation algorithm adds vestibular perception system on the basis of classical simulation algorithm, feeds back the output error of the algorithm, uses fuzzy control algorithm to correct and predict the input acceleration and angular velocity, and simulates the topographic fluctuation in virtual reality. The improved somatosensory simulation algorithm is modeled and simulated in MATLAB/Simulink. The simulation results show that the improved somatosensory simulation algorithm reduces the phase delay and false hints, and improves the consistency of virtual and real motion.
A Study on Time-Scaling Property of Temperature Events
Authors: Liu Zuhan 
Published: December 2019

Abstract
This study used detrended fluctuation analysis (DFA) and self-organized criticality method to characterize the temporal fluctuations of temperature events of Jiangxi Province. The DFA results show that the temporal scaling behaviors in temperature events. In shorter temporal scaling, it indicates the similar persistence corresponding to the annual cycle. However, in longer temporal scaling, the trends are different for the four series, which reflect the different inherent dynamic nature of various pollutant series. Furthermore, based on the self-organized criticality (SOC), the frequency-intensity distribution of temperature change satisfied Gutenberg-Richter power-law relation. Then, a numerical sandpile model with decay coefficient is constructed to reveal inherent dynamic mechanism of temperature events based on the idea of sand model. The study on occurring mechanism, temporal evolution and inherent dynamic behavior of temperature events, which could provide the scientific basis and important reference for effective establishing all kinds of emergency plan such as extreme weather disaster prevention, mitigation and relief.
Study on China’s electricity market mechanism of renewable Energy
Authors: Zhang Fan , Zhao Zheng , Tang Chenghui 
Published: December 2019

Abstract
This paper first introduces the current situation and background of China’s renewable energy power generation, and analyzes the difficulties of renewable energy consumption in detail. The next section mainly introduces how China’s electricity market mechanism adapted to renewable energy of high penetration. China’s electricity market mechanism is further designed based on the existing market mechanism. These market mechanisms are divided into two stages. The first stage is that the spot market has not yet been established, and the second stage is the establishment of the spot market. In both stages, the design of a market mechanism to promote renewable energy accommodation is based on the national market.
Research on Fault Diagnosis Method of Wind Turbine Bearing Based on Deep belief Network
Authors: Wang Liang , Ma Yuanyuan , Rui Xiaoming 
Published: December 2019

Abstract
Bearings of wind turbines have become one of the components with high failure rate in wind turbines because of their bad operating environment. In this paper, a fault diagnosis model based on deep belief network is proposed for bearing fault diagnosis of wind turbine. The time-frequency spectrum of wind turbine bearing vibration data after short-time Fourier transform (STFT) is used as the input of fault diagnosis model, and the output is the identification code of various fault types of wind turbine bearing. Compared with the deep belief network diagnosis model based on the time domain signal input to the vibration data of wind turbine bearings, the deep belief network fault diagnosis model based on the short-time Fourier transform of the input signal has higher recognition accuracy. Based on the vibration data of different working conditions and rotating speeds, the model can automatically find fault features and identify the faults of rolling elements, inner rings and outer rings of rolling bearings at different locations, thus avoiding expert experience and feature engineering, making the model more versatile and generalizable and potential for efficient on-site rolling bearing fault diagnosis.
Research on Operation Risk Prevention and Control Method of Multi-energy Complementary New Energy Power Generation System under Market Mechanism
Authors: Lan Mengxin , Zeng Ming , Cao Yuwei , Tian Shi , Wei Peng , Song Rui 
Published: December 2019

Abstract
The development of multi-energy complementary new energy generation system is of great practical significance in today’s era when the demand for electricity is increasing and environmental protection is imminent. However, due to the limitation of external environment, internal technology and materials, the development of new energy system with multi-energy complementary energy is faced with many risks, which have a certain impact on its development. Risks cannot be avoided and will exist for a long time. Therefore, it is of great significance for the development of this system to correctly identify risks and evaluate them, and to propose corresponding countermeasures and focus according to the assessment results. This paper first analyzes and identifies qualitatively the risks faced by the new energy system under the market mechanism from the aspects of policy risk, transaction risk, market risk and operation risk. Then, the risk index database was established, and the risk of various aspects were presented side by side, and the main influencing factors of the risk were listed correspondingly. Next, risk assessment model is established through analytic hierarchy process and fuzzy comprehensive evaluation method, aiming to evaluate the above risks qualitatively. At the same time, a concrete example is introduced to apply and test the above model, and a constructive conclusion is obtained for the example, and the feasibility of the risk assessment model established in this paper is verified, which can be applied to risk assessment of other similar projects.