bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effects of Different Factors on Seed Germination and Seedling Growth in Echinacea purpure
Authors: Liu Ying , Liu Hongjie , Li Xiaohao , Lin Shiwan , Liu Kaizhe , Xue Yingbin , Chen Miao 
Published: October 2020

Abstract
In this experiment, seeds of Echinacea purpure were used as materials to investigate the effects of several factors on the germination and seedling growth. The results showed that 6-BA, SNP and NAA all promoted the germination and seedling growth of E. purpure seeds. The best effects were obtained, when application of soaking treatment for seeds with 5 mg/L NAA before inoculating them onto MS media supplied with 0.1 mg/L IAA, the highest seed germination rate was 86.7%, and the best rooting rate of seedlings was 83.3%. However, seed sprouting and development of seedling were inhibited, when Mn2+ was added into mediums.
Preparation and Chemical Analysis of Volatile Oil in Two Different leaf type of Ficus hirta Vahl.
Authors: Chen Lishi , Chen Jianping , Du Mengjiao , Tang Wenjing , Zhang Biting , Yu Chuqin 
Published: October 2020

Abstract
To analyze the chemical constituents of volatile oil in two different leaf types of Ficus hirta Vahl. Steam distillation was used to collect the different leaf types of Ficus hirta Vahl., the volatile chemical components of extracts were analyzed using GC-MS,and the relative contents of various chemical components in the volatile oils of the two medicinal materials were calculated by area normalization method. The volatile oils of the Ficus hirta Vahl of three-lobed leaf type and five-lobed leaf type contained 38 and 39 compounds, respectively. The main components are coumarins, organic acids, aldehydes, esters, alcohols, etc. In addition, there are some Hydrocarbons, phenols, ketones, and the chemical composition and relative content of volatile oils of the two have large differences.The method can quickly and easily identify the chemical constituents of the volatile oils of two different leaf Ficus hirta Vahl., and there are significant differences in the chemical constituents in the volatile oils of the Ficus hirta Vahl. of three-lobed leaf type and five-lobed leaf type.
Nanofiber Mask Fabrication by Electrospun and Its Application
Authors: Su Wen-Ta , Hsu Ming-Shiuan 
Published: October 2020

Abstract
Electrospinning technology is a novel nano-process technology in recent years. It can directly and quickly spray polymer into nano scale fibers, improve the specific surface area, porosity and microporous structure of materials, and extend materials to different applications. Blend PVA/gelatin/magnesium ascorbyl phosphate/tranexamic acid solution, and spin the fibrous mask of 600~800 nm by electrospun spinning machine. Analyze the composition of the fibrous mask, mechanical strength, swelling ratio and nutrients release rate. Finally, evaluate the effect of nanofiber mask by human body test. This study provided a quality nanofiber mask that will be commercially available in the future.
Study of Highly Cited Papers on Antineoplastic Drugs
Authors: Qu Qinghui , Zhang Xinyang , Huang Chongya , Fang Yu , Yuan Baohua 
Published: October 2020

Abstract
The objective of this paper is to study the highly cited papers (papers cited more than 30 times) on antineoplastic drugs, and to provide reference for quality improvement and influence increase of journals. Bibliometric analysis of cited papers on antineoplastic drugs published between 1999 and 2018 is conducted by using the Chinese Citation Database. The results show that 4683 papers are cited 34463 times, with an average of 7.36 times per paper. The papers published in 2005, 2010 and 2009 are the most highly cited papers with 2507 (7.27%), 2424 (7.03%) and 2419 (7.02%) times, respectively. The highest number of citation is owned by the paper authored by Ding Jian which is cited 349 (1.01%) times. The most cited journal is Chinese Journal of New Drugs, which is cited 1287 (3.73%) times. The author’s affiliation with the highest citation is China Pharmaceutical University with a citation of 1252 (3.63%) times. The research fund with the highest citation which funded those studies is National Natural Science Foundation of China with a citation of 4278 (12.41%) times. The most highly cited subject is pharmacy with a citation of 12036 (34.92%) times. The main citation period of the top 20 papers is from the 2nd year to the 9th year after publication, accounting for 67.70%. The peak years of citation are the 4th year and the 5th year after publication. Among the above-mentioned top 20 papers, the first authors of 9 papers are from universities, accounting for 45.00%. There are 210 papers with a citation over 30 times for each paper, including 112 (53.33%) research papers and 98 (46.67%) review papers. The study also shows that the subjects of research papers with high citation include pharmacological experimental research, the evaluation of clinical effects, and the impact and protection of antineoplastic drugs, the number of cited papers of which are 50, 18 and 13, accounting for 23.81%, 8.57% and 6.19%, respectively. The papers with high citation frequency are those about antineoplastic drugs in pharmacological effects and mechanisms, clinical evaluation, occupational protection, adverse reactions, as well as various reviews. Editors of journal should focus to organize and absorb above ideas in selecting manuscripts to fully exploit the excellent manuscript sources, and to improve the quality and influence of journals.
The Effect of TiAl6V4 Particles on Tissue in Rats
Authors: Luan Huiqin , Liu Hong , Bi Jingfang , Chu Zhaowei , Mo Zhongjun , Guo Huan , Wang Fang , Fan Yubo 
Published: October 2020

AbstractElectron beam melting (EBM) is three-dimensional (3D) printing technologies that can manufacture multi-functional porous scaffolds with exact structures for the application of surgical operations. In the past decade, thousands of acetabular implants manufactured by EBM or SLM have been designed into acetabular cups with certain porosity for surgical operations. Particles of 3D printed porous Ti6Al4V implants will adhere between sintered interface and non-sintered interface of porous sample during 3D printing. However, the internal excess particles of complex structural parts are difficult to remove. During long-term cyclic loading, stress strain can cause residual Ti6Al4V particles to fall off. These detached Ti6Al4V particles are scattered around the implant and are contact with osteoblasts. In our study, we detected the influence of the differentiation concentration of Ti6Al4V particles on bone of rats. The influence of the differentiation concentration of Ti6Al4V particles on bone was evaluated by distal femoral defects in rats. Micro-CT and biochemical analysis were used to evaluate all of the rats after 12 weeks. Outcomes demonstrated that low concentration Ti6Al4V particles may improve the osteogenesis of SD rat through micro-CT. Serum markers implied that the differentiation concentration of Ti6Al4V particles didn’t influence on hepatic and renal functions. In conclusion, Low-dose residual particle does not induce a decrease in bone mineral density (BMD) of rats.
Fabrication and Characterization of a Novel Berberine-oleanolic Acid Delivery Collagen I scaffold
Authors: Chen Zongming , Li Yongsheng , Dai Yao , Zhou Zheng , Hu Yibing , Liu Hairong 
Published: October 2020

AbstractPostoperative bacterial infection greatly threatens prognosis of patients following tissue engineering implantation and surgical operation. In this study, a novel antibacterial tissue engineering porous scaffold has been prepared, by blending a newly synthesized berberine-oleanolic acid (HL-9) with collagen (COL I) via freeze-drying. It showed that the HL-9 delivery COL I scaffolds displayed a uniform porous three-dimensional structure, high porosity and good water absorption. These HL-9 delivery COL I porous scaffolds (HL-9/COL I scaffolds) are able to release HL-9 steadily for 15 days. HL-9/COL I scaffolds, which contains, 4% and 5% HL-9 respectively, exhibited a similar antibacterial activity against Gram-positive and Gram-negative bacteria. Hence, the HL-9/COL I scaffolds containing 3% HL-9 is used to test the biocompatibility. By employing Alamar Blue assays and FDA staining, the proliferation of MG-63 cultured with 3%HL-9/COL I scaffolds is similar with that cultured with COL I scaffolds. In conclusion, the 3%HL-9/COL I scaffolds showed a good biocompatibility and antibacterial activity, suggesting that it may be applied in tissue engineering in the future.
Effects of Gingerols on Yeast Growth and Metabolism of the Fermentation Process
Authors: Li Zhixin , Ying Chen , He Chuan , Wei Min 
Published: October 2020

Abstract
In this paper, the effects of gingerol on yeast growth and metabolism of the fermentation process is investigated by measuring the minimum inhibitory concentration, growth curve, alcohol, residual sugar, pH, total acid, intracellular trehalose and glycerol in different stages of yeast fermentation. The results showed that the minimum inhibitory concentration (MIC) of gingerol was 6mg/mL. In the fermentation process, with the increase of the amount of gingerol, the yeast number, the alcohol of fermentation liquor and the Glucose-lowering rate were decreased, the fermentation was incomplete, pH was lower, total acidity was increased, and the content of trehalose and glycerol were increased. The inhibitory effect of gingerol amount on yeast was: 4 mg/mL>2 mg/mL>0.5 mg/mL>0 mg/mL (no gingerol was added). This showed that gingerol has an obvious inhibitory effect on the growth and fermentation of yeasts.
Kinematic Analysis and Trajectory Planning Simulation of Citrus Picking Manipulator
Authors: Xu Lijia , Liang Yuan , Kang Zhiliang 
Published: October 2020

Abstract
Trajectory planning is the premise of studying robot control. This study takes PUMA560 robotic arm as the research object and applies it to citrus picking. This research carried out kinematics analysis and simulation on its picking process, and then performed trajectory planning and workspace analysis. Firstly, the kinematics analysis and simulation of the picking robot arm were carried out in the forward and reverse direction, and the kinematics model was established by Denavit-Hartenberg method. Secondly, the trajectory planning of the robotic arm based on quintic polynomial interpolation is performed in the joint space, and the fitting curves of joint angular displacement, angular velocity and angular acceleration are plotted respectively. Finally, the working space of the picking manipulator is analysed and its working space diagram is drawn. The simulation results show that the trajectory planning and workspace drawing methods selected in this study are effective for the trajectory planning of citrus picking manipulator and provide theoretical support for the control research of citrus picking manipulator.
Research on the Control System of Winding Tension of Strip Stator
Authors: Zhao Kaijie , Zhao Liangliang , Zeng Sheng 
Published: October 2020

Abstract
In order to solve the problem of severe tension fluctuation in the winding process of strip stator, a tension control system is built with Micro-Controller Unit as controller, encoder as sensor and servo motor as actuator. Besides the employment of traditional PID feedback control, a feed-forward control link is introduced at the same time. The simulation results of PID control with and without feed-forward are compared. In addition, experiments under different working conditions are also carried out. Specifically, when the desired tension value is set at 500g along the 0.35mm enameled wire that being wound onto a strip stator at 900r/min, the tension overshoot and swing angle fluctuation are 0.88° and ±0.53° respectively. It is also found that, rather than the speed of the frame, it is the tension that significantly effects the control performance in the proposed system.
The Low-Frequency Acoustic Scattering Characteristics Study on Underwater Elastic Targets by the Coupled FEM-BEM Method
Authors: Xu Weilong , Shen Lijiao , Peng Weicai 
Published: October 2020

Abstract
A mathematical model about calculating acoustic scattering of elastic shell with air inside unbounded fluid was developed using a coupled finite element and boundary element technique. The coupling of elastic shell with air and shell with fluid was included in this model. To validate the scheme, the scattering characteristic of spherical shell with air submerged in water was calculated. Comparison of the numerical results with the corresponding analytical solutions shows that they are in good agreement in low frequency. On this basis, the low-frequency acoustic scattering characteristic of underwater elastic target was calculated with this method. The results showed the shell thickness and material have little effect on the target strength in the transverse direction, when the frequency is 100-300 Hz. In the omni-direction, the target strength of titanium alloy shell is higher than that of steel shell, and the larger the shell thickness, the greater the target strength. As the frequency is 200 Hz, the steel shell with a thickness of 28 mm has the phenomenon of acoustic resonance, resulting in a sharp increase in the target strength.
Affect of Elastic Displacement Limiter on Shock Response of Double-stage Vibration Isolation System
Authors: Gong Yufeng , Peng Weicai , Liu Zhizhong 
Published: October 2020

Abstract
With a certain shock load, the displacement of the equipment with double-stage vibration isolation mounting may exceed the deformation limits of isolators themselves. Therefore, elastic displacement limiters usually need to be used in order to limit the relatively large displacement. In this paper, the response of the double-stage vibration isolation system was studied by numerical method. Effects of stiffness and assembled clearance of elastic displacement limiter on shock response were discussed.
Dynamic Characteristics Analysis of Cracked Magnetic Rotor-Bearing System
Authors: Yang Yan , Zhang Lingyun , Zhang Yanxia 
Published: October 2020

Abstract
A dynamic model of the rotor system supported by active magnetic bearings at both sides is established, the fourth-order Runge-Kutta method is used to simulate. The periodic motion transition of the system and its evolution to chaotic motion are discussed from bifurcation diagrams and phase diagrams. It emphatically analyse the change of crack influencing factor and eccentricity on the system response and stability. The results show that the system presents period motion with appropriate parameter conditions. Large crack fatigue damage and value of eccentricity increases the amplitude and chaotic motion window in the low speed region, decrease the system stability. When the rotor crosses the critical speed range and reaches the high rotational speed region, the stable period-1 motion is dominant.
Multi-objective Optimization of Injection Process Parameters Based on EBFNN and NSGA-II
Authors: Lu Yuansan , Huang He 
Published: October 2020

Abstract
Taking the process parameters and quality index data obtained from the optimal Latin hypercube test of a front hood inner panel as sample data, this paper constructs an EBFNN approximate model by combining the NSGA-II multi-objective optimization algorithm to perform multi-objective optimization of injection molding process parameters, obtained Pareto solution set for volume shrinkage and warp during ejection. Comparing the Moldflow numerical simulation results of the four relatively optimized Pareto solutions, the optimal combination of process parameters is obtained. The optimized volume shrinkage and warp deformation reduced by 50.518% and 39.845% respectively, which verified the reliability and practicability of this method, and had certain practical reference significance for the optimization of injection molding process of other plastic parts.
Low Frequency Characteristics of a Two-Degree-of-Freedom Vibration System with Complex Rigid Constraints
Authors: Wang Shijun , Luo Guanwei 
Published: October 2020

Abstract
The dynamic model of a two-degree-of-freedom impact vibration system with complex rigid constraints under the action of periodic excitation force is established. Through the multi-objective and multi-parameter numerical simulation, the types and distribution areas of the periodic impact motions of the system in the (ω, δ)-parameter plane are obtained. The transition law of the fundamental impact motions of the system in the low frequency area is discussed, the generation mechanism of the tongue-shaped regions appearing in the transition process and the types of subharmonic motions in the tongue-shaped regions are analyzed.
Study on the Viscoelastic Behaviors of PMMA
Authors: Cheng Dong , Chen Tengfei , Cao Wei 
Published: October 2020

Abstract
The polymer rheology is essential for plastic manufacturing. In order to master the rheological characteristics of polymethyl methacrylate (PMMA) a viscoelastic model of PTT is employed to describe its rheological behaviors in 1-D channel flow. The corresponding governing equations are established based on isothermal impressible fluid. Then construct a numerical method to calculate the viscosity change with shear rates so as to explore the influences of the nonlinear parameter and relaxation time spectrum. The rheological experiments were carried out with three PMMA brands in a capillary rheometer to measure the viscosity at different shear rate. The experimental results show the Newtonian region appears within the scope [0, 2.1] for shear rate, and the constitutive equation can correct describe the rheological characteristics if the parameters are set properly.
Power Loss of Crystalline Solar Cell under Cyclic Loadings
Authors: Li Zhiqi 
Published: October 2020

Abstract
In application of building attached photovoltaic in China, the solar cells in the modules are mono-crystalline or polycrystalline cells. In some applications where the wind load is at higher level, a large deflection of the modules will occur. Due to the fluctuation of the wind load, the initial damages inside the cells will develop under this cyclic loading, as a result, the power loss of the solar cell can be observed due to the development of the fatigue damage. In this paper, the fatigue damage evolution of crystalline solar cell in module is investigated experimentally. The damage evolution with the cyclic number was obtained via the measurement of the power loss of the cell. The damage evolution equation was derived based on the continuum damage mechanics and the fatigue life of the cell was predicted.
Study on Wind-Induced Vibration of Tension String Shielding Ring for UHVDC Transmission Lines Based on Modal Test
Authors: Qi Yi , Zhang Zhao , Liu Shengchun , Si Jiajun 
Published: October 2020

Abstract
Under the action of natural wind, the shielding ring of tension string of UHVDC transmission line is prone to low frequency vibration, and the long-term vibration may lead to the fatigue damage of the shielding ring, threatening the safe operation of the line. In this paper, the modal test of the shielding ring of the tension string of UHVDC transmission line is carried out by using hammering method, and the natural frequencies and vibration mode shapes of the shielding ring are mastered. Combined with the analysis of the wind speed and wind direction in the engineering site, it is shown that the vortex induced vibration of the shielding ring is caused by the low-speed continuous stable wind along the line.
Newton Categories for a Solvable Element
Authors: Wan Fang 
Published: October 2020

Abstract
Let us suppose we are given an empty category π(
r
). We wish to extend the results of [9] to infinite, Eratosthenes triangles. We show that

W

<

h
¯

(

A

(
J
)

)

. In [9], the authors address the suijectivity of separable, nonnegative arrows under the additional assumption that V(X) is local. Recent developments in commutative algebra [25] have raised the question of whether every unique, partial, finitely abelian field is almost Cauchy, multiply Darboux and complete.
Stress Loading Analysis for Quayside Container Crane Draw Bar Based on VMD-Weibull Distribution
Authors: Hou Meihui , Hu Xiong , Dong Kai , Sun Zhiwei 
Published: October 2020

Abstract
The load distribution characteristics of quayside container crane (QCC) draw bar system is of great significance for fatigue analysis, life assessment and reliability calculation of metal structures. In order to describe the load distribution characteristics accurately, a method for extracting the characteristic parameters based on the VMD-Weibull distribution was proposed. Firstly, use the Wiener filtering feature of VMD to perform filtering processing. Then use the cubic spline interpolation envelope method to reconstruct the data, and performs Weibull distribution modeling on the reconstructed data to extract the scale parameters and shape parameters. Compared with the maximum entropy probability density curve, the stress loading is consistent with the Weibull distribution. At last, evaluate the draw bar and predict the development trend of the draw bar performance.
Analysis and Prediction of Air Quality based on LSTM Neural Network —— Take Beijing Temple of Heaven as an Example
Authors: Fang Hong , Zhang Lan 
Published: October 2020

Abstract
LSTM is an excellent variant model of RNN, which inherits the characteristics of most RNN models and solves the problem of gradient disappearance caused by a gradual reduction in the process of gradient backpropagation. LSTM is very suitable for processing data highly related to time series. This paper selects meteorological elements and air quality data of the temple of heaven in Beijing from 2016 to 2018, analyse the correlation between meteorological elements and air quality, selects index modeling, and designs an air quality prediction model based on LSTM neural network. It is concluded that the model has better accuracy and robustness. Finally, reasonable air pollution control measures are proposed to provide a scientific theoretical basis and new prediction methods for the prevention and control of air pollution.
Structural Optimization Design of H-type Piezoelectric Actuator Based on APDL
Authors: Rui Suyuan , Wang Xinjie 
Published: October 2020

Abstract
Aiming at the problem of low efficiency in optimizing the H-type piezoelectric actuator with the “trial method”, this article uses a program written in the APDL (ANSYS Parametric Design Language) to optimize the structure of the piezoelectric actuator. First, a parametric finite element model is established based on the initial data values of the mover structure. Modal analysis and sensitivity analysis are performed to determine the design variables. Then, the objective function is determined based on the frequency consistency of the two-phase working modes. Finally, based on the optimization tool proposed in this paper, the structure of the H-type piezoelectric actuator is optimized. The optimization results show that the optimization program based on APDL can achieve the optimal design requirements of the H-type piezoelectric actuator and shorten the time required for structural optimization design.
Nonlinear Numerical Simulation of Service Behaviour of Regenerative Burner under Multiple Thermal Shocks
Authors: Jiang Fanzhi , Kong Jianyi , Ouyang Degang 
Published: October 2020

Abstract
In order to explore the service behaviour of regenerative burner parts, the burner refractory was studied experimentally and thus a series of temperature-related material performance parameters were obtained. A method for calculating the Young’s modulus of materials between two thermal shocks was proposed by combining the law of Young’s modulus varying with temperature and that of residual Young’s modulus varying with the quantity of thermal shocks. The service process of the burner under the condition of multiple thermal shocks was nonlinearly simulated by using the obtained parameters. The results show that the thermal load of regenerative burner in stable service is about 0.55 MPa, that is much less than the previous result without considering the material nonlinear characteristics, 37Mpa.