bluuebunny/crossref_metadata_2025_split huggingface dataset:
Atomic layer deposition of Ti and its deposition method
Authors: Zhang Xingyu 
Published: March 2020

Abstract
Atomic layer deposition (ALD) is a very popular thin-film technique, and it is considered to be a method with great potential because it can produce conformal thin film with control of the thickness of layers and composition of the films at the nano-scaled level. In fact, there are other two types deposition techniques: Chemical Vapor Deposition (CVD) and Physical Vapor Deposition (PVD), which are also commonly used in surface treatment. However, the treatment conditions are different as CVD requires up to 1000°C while PVD requires lower than 500 °C. However, because of the self-controllability in ALD, this technique is widely applied in the fields including semiconductors, nanotechnology, and catalysts. In our current knowledge, substantial numbers of element could be used for ALD to form substrate layers. Some notable elements are carbide, Nitride, oxide, metal and so on. Among all kinds of possible deposited materials, titanium contained precursor are special and they receive tremendous attention because they could strengthen the base materials or protect the base materials from oxidization so that they improve the mechanical or chemical properties of pristine materials. Specifically, it could improve the properties of base materials such as reducing the work function, which is discussed in the passage. The purpose of this review is to provide an overview of current technology of deposition titanium contained chemicals and point out possible research topics in the future.
RETRACTED: Self-Healing Performance of Protective Coating with Inhibitor Loaded Nanoparticles of Mesoporous Silica on Copper Alloy
Authors: Zhang Liwen , Song Jiping 
Published: March 2020

Abstract
The self-healing coating on the copper alloy surface was prepared by adding inhibitor loaded composite nanoparticles into alkyd varnish coating with a content of 4 wt.%. The self-healing performance of the scratched coating immersed in 3.5% NaCl solution was evaluated by morphology observation, Fourier transform infrared spectroscopy, electrochemical impedance spectroscopy and scanning Kelvin probe. It has been proved that the scratched coating containing the composite nanoparticles can be self-healed with the formation of the inhibitive film at the coating crevice during the immersion.
Diagnostic method and application of low speed sliding bearing wear fault
Authors: Guo Junshan , Zheng Wei , Han Yue , Zhu Linkai , Che Yongqiang , Wang Jin , Wang Ming 
Published: March 2020

Abstract
The static thermal and dynamic characteristics of the oil film affect the motion stability of the rotor system and directly determine whether the entire equipment can operate safely and stably. In this paper, the characteristics of sliding bearing oil film are studied by theoretical analysis, and the bearing wear fault diagnosis model is proposed. The model is verified by the actual production. The results show that the proposed diagnostic model can quickly locate the cause of the fault and ensure the safe and stable operation of the equipment.
Research Progress on Typical Fault Monitoring and Diagnosis of Aircraft Engine
Authors: Li Jiayan 
Published: March 2020

Abstract
As one of the core components of aircraft, whether engine could be operated normally will directly effect on the safety of aircraft. How to monitor and identity different fault condition about core components of engine plays a vital role in ensuring air safety and reducing maintenance costs as well as has important value in safety and economy. This paper summarizes the typical fault and monitoring means of aircraft engine, which can provide some references for related research.
Study on Controllable growth of graphene prepared by CVD
Authors: Zhou Xin 
Published: March 2020

Abstract
Graphene is a two-dimensional honeycomb crystal of monoatomic thickness composed of hexagonal sp2 hybrid carbon atoms. Since the mechanical separation of Andre Gamm and Konstantin Novoselov in 2004 to obtain a single layer of graphene, this unique two-dimensional structure makes graphene excellent physical, chemical, mechanical, electrical and other properties. It has become the focus of much research in recent years. These properties include exceptionally high charge, high mechanical strength and elasticity, optical clarity and a variety of possible chemical modifications that make graphene promising in micro-nanoelectronics, photodetection and conversion materials, structural and functionally enhanced composites and storage. It can be applied in a wide range of fields, but graphene is different from graphite in nature, and its size is small and the yield is low. So how to prepare high quality graphene is the key to study its application prospects. The emergence of chemical vapor deposition (CVD) technology solves these problems and has evolved into an important method for preparing large-area, large-size, multi-purpose graphene. Large-sized graphite thin single crystals can be obtained on a substrate by controlling the growth mode and different treatments for the substrate. Due to the strong interaction between carbon atoms and the substrate, there are still many difficulties and challenges in directly growing graphite on the insulating substrate. This topic aims to prepare graphene by chemical vapor deposition (CVD) and prepare it. The method is improved to obtain graphene with excellent performance, which provides more feasibility for the practical application of graphite thinning in semiconductor devices.
Research on Evaluation Method of Storage Reliability of a Control Cabin
Authors: Zhao Xiaodong , Mu Xihui 
Published: March 2020

Abstract
A problem that is difficult to assess for storage cabin storage reliability. According to the historical data of the control cabin, the life distribution function was assumed, and the model parameters were estimated by the maximum likelihood estimation method and the minimum chi-square estimation method respectively, and different storage life distribution functions were obtained. Then compare and analyze different storage life distribution functions to determine the storage life distribution function of the control cabin. Finally, the Person’s chi-square goodness-of-fit test was used to verify the results. The life distribution function of the control cabin is the I-type maximum value distribution, and the storage life is 18.12 years when the confidence is 0.90 and the reliability is 0.95. It provides a basis for subsequent life extension maintenance work and compares different storage reliability assessment methods.
Reactivity of Metal Boronhydride Derivatives with Amines and Ethanolamines
Authors: Chen Ling , Yang Liya , Wang Chunxia , Zhu Ting 
Published: March 2020

Abstract
Reducing agents LiBH4, NaBH4, NaBH(CO2CH3)3, NaBH(OCH3)3 and NaBH3CN are widely applied in organic synthesis, biochemistry and medical chemistry. In this paper, the structure and the reactivity of metal boronhydride derivatives with amines were studied and the coordination of amines and ethanolamines towards metalboronhydride derivatives was investigated.
Synthesis and Electrochemical Performance of Zn-Doped LiMn2O4as Cathode Material for Lithium Ion Batteries
Authors: Zheng Hao , Wang Ting , Cheng Jinsong , Li Lin , Liu Qing , Zhao Rongfei 
Published: March 2020

AbstractThe spinel LiMn2O4and Zn-doped LiMn2O4samples were prepared by a solgol method followed by annealing. The structure and morphology of the as-prepared material were analyzed by X-ray diffraction and electron microscopy. The results obtained show that those samples possess a perfect spinel structure. The electrochemical measurements are carried out to study the properties of the LiMn2O4and Zn-doped LiMn2O4. The results indicate that Zn-doped LiMn2O4manifests enhanced high capability, rate capability, and superior cycling stability. Especially, the LiMn1.9Zn0.1O4sample show good electrochemical performance (the reversible discharge capacity of 120 mAh/g at 1C, after 100 cycle).
Topology Optimization Design of Boat Boom Structure Based on Level Set Method
Authors: Qu Dongyue , Chen Qiang , Xu Jianan , Kou Tianxin 
Published: March 2020

Abstract
The marine boom is optimized by a level set topology optimization method based on the reaction diffusion equation. In order to overcome the characteristics that the boom is difficult to be topology optimized, the periodic topology optimization theory is introduced to divide the boom into several cycles, and two typical conditions of maximum amplitude and minimum amplitude are selected respectively. Finally, the optimized boom structure is processed and remodelled and finite element analysis is performed, which still meets the original performance index.
Dynamic Monitoring of RS and GIS Resources and Ecological Environment Based on High Temperature Materials
Authors: Jiang Shuhui , Tang Li , Ju Hui 
Published: March 2020

Abstract
The dynamic monitoring and analysis of regional ecological environment is an important part of land use research, which can provide support for regional ecological environment and macro regulation of government departments. With the support of remote sensing technology (RS) and geographic information system (GIS), a land use dynamic monitoring system is established to obtain land use change information quickly, accurately and economically. In order to reduce the influence of thermal radiation, noise and vibration of high temperature material machinery on the measurement results in high temperature measurement environment, the paper proposed the measurement method of ultraviolet light high humidity thermal deformation and gray average method. In this paper, the algorithm of digital image correlation method and the establishment of high temperature measurement system are studied. A set of high temperature material mechanical digital image correlation system suitable for high humidity environment measurement is independently established and applied to the high humidity test of materials. The results show that the above comprehensive method can effectively improve the influence of thermal flow disturbance on system imaging in high humidity environment. Comprehensive analysis of regional ecological environment data shows that environmental quality is closely related to regional ecological environment. Meteorological conditions are one of the important factors affecting the environment, and the project of returning farmland to forest plays a vital role in improving the environment.
Surface wettability aging behavior of aramid fiber III after oxygen plasma treatment
Authors: Guo Lu , Wang Jing , Jia Song , Yang Mingfei , Sun Fuding , Wang Junyang 
Published: March 2020

Abstract
Aramid Fiber III was modified by oxygen plasma treatment. The fiber surface wettability before and after different oxygen plasma treatment pressure, and surface wettability aging behavior were observed by Dynamic Contact Angles Analysis (DCAA), respectively. The results showed that aramid fiber surface wettability were increased after oxygen plasma treatment. The total surface free energy increased from 37.78 mJ/m2 for untreated sample to 69.63 mJ/m2 with 40 Pa plasma treated fiber. The fiber surface wettability decreased slowly with storage time in air. The fiber surface wettability decreased from 67.79 mJ/m2 for 20 Pa plasma-treated sample to 63.85 mJ/m2 after 30 days.
SnO2 microrods based triethylamine gas sensor
Authors: Wang Lu , Peng Ruiqin , Ci Lijie , Li Yuguo 
Published: March 2020

Abstract
Triethylamine (TEA) gas sensor having high response and stability are in great demand in the actual working environment. In this paper, SnO2 microrods are prepared on SiO2 (300 nm)/Si substrate by thermal evaporation. The SnO2 microrods-based gas sensor is successfully prepared. The gas response and stability of the sensor are tested at an optimal temperature of 200 °C. When the sensor is exposed to 100 ppm TEA gas, the response time is only 4 s. The detection limit is below 1 ppm. The gas-sensing mechanism is further discussed.
Robustness interval of apparent air bubbles of fair-faced concrete
Authors: Zhang Jian , Qian Chunxiang , Chen Yanqiang 
Published: March 2020

Abstract
In this paper, a method of controlling the apparent quality of fair-faced concrete is adopted. By adjusting the rheological parameters of fair-faced concrete slurry, the robustness interval of repeatedly stable preparation of fair-faced concrete with excellent apparent quality is obtained. It has a good economy and has a good guiding significance for practical engineering. The results show that the plastic viscosity coefficient of fair-faced concrete slurry is 5.67∼9.69 Pa·s, and the yield stress is between 112.25∼195.68 Pa. The fair-faced concrete with good apparent quality can be obtained.
Analysis and Optimization Design of Cantilever Structure of Shear Wall Corner
Authors: Hu Di , Peng Xuezhong , Shi Tinfeng 
Published: March 2020

Abstract
In the frame-shear wall high-rise building, it is necessary to design a special cantilever structure to connect shear wall with two mutually perpendicular frame beams when they do not intersect. In the paper an innovative simplified approach to design special cantilever structure with steel reinforced concrete is presented, which includes two steps as design of feasible steel structure and design of reinforced concrete based on structural analysis and optimization. The demonstrated design idea and design method provide valuable reference for innovative design of complex cantilever structure of shear wall corner with frame beams.
The Measurement to the Pillar Fillet Weld of the Differential Settlement Spherical Tank by the ACFM
Authors: Wu Zemin , Dai Guang , Zhou Guoqiang , Leng Jiancheng 
Published: March 2020

Abstract
Present the method that using the ACFM to test the spherical tank which had appeared the differential settlement. First introduced the principle and the system composition of the ACFM, by using which, the pillar fillet weld of the LPG spherical tank had been tested, and then the quantitative evaluation of the weld cracks had been get out. After analyzed deeply, the reliability of the ACFM when testing the pillar fillet weld of the spherical tank had been proved, in additionally, the causes of how the cracks come out had been given, too.
Effect of Deformation on Precipitation Behaviors of Carbide in Ti-Nb-Mo Steel
Authors: Yang Yong , An Kang , Zhang Xiaofeng , Huang Zhenyi , Li Yanmei 
Published: March 2020

Abstract
The precipitation behaviors of (Ti, Nb, Mo)C in specimens of Ti-Nb-Mo steel hold at 700°C under no deformation condition and deformation condition with engineering strain 0.4 imposed in austenite region have been studied. The results indicate: under no deformation condition, the rows of interphase precipitation show straight and/or curve morphology, and the precipitation behaviors include interphase precipitation, random precipitation and fibrous precipitation; under deformation condition, the rows of interphase precipitation are straight, and the precipitation behaviors include interphase precipitation and strain-induced precipitation. Furthermore, the dispersion of precipitate particles formed under deformation condition is more uniform than those formed under no deformation condition.
Evaluation Research on Green Degree of Green Packaging Materials
Authors: Li Yan , Sun Zhenqing 
Published: March 2020

Abstract
Green packaging materials are packaging materials which are harmless to human health, have a good protective effect on ecological environment and can be recycled in packaging materials that people produce, manufacture, use and recycle. Green packaging materials can save resources and energy; they can be naturally degraded or reused without breaking ecological balance after being discarded, moreover, green packaging materials have a wide range of sources, low energy consumption, easy recovery and high recycling efficiency. Green packaging materials are the premise and foundation of green packaging design. Based on the analysis of the shortcomings of traditional material selection methods, this paper establishes the selection principles of materials in green packaging design, and elaborates on how to use theoretical method of pan-environmental function to evaluate the green degree of green packaging materials, and finally select the best green packaging materials.
The explosion resistance analysis of the safety evacuation device
Authors: Wang Yong , Feng Xuezhi , Cui Lizhuang , Sun Gengyu , Wang Yongyan , Jing Xiumin 
Published: March 2020

Abstract
The explosion resistance is one of the main functions of the safe evacuation device, and the explosion resistance of the safety evacuation device is mainly determined by the safe evacuation cabin, and therefore it requires the building structure to have sufficient strength and stiffness to resist the blast wave application to the cabin. In this paper, a new model of the similar triangular cabin structure is established. The explosion resistance impact analysis of the similar triangular cabin structure is carried out by AUTODYNA and ABAQUS software. The similar triangular cabin structure is placed in the simulated residential building, and the pressure cloud in the room during the explosion and the change of the pressure at each time in the single room can be obtained by TNT explosion test simulation. The pressure curve is used to analyze explosion resistance of the safe evacuation device, and the stress and deformation of the new cabin structure can be obtained. At the same time, the stress concentration are located at the corners of the interior of the cabin and the maximum deformation is located on the front and back walls of the pod which can meets the safety evacuation shock resistance.
Design of an ultra-thin magnetic radar absorber embedded with double period frequency selective surface for entire L-band microwave absorption
Authors: Xiao Houdi , Zhang Lingdong , Lv Mingyun , Qu Zhipeng , Wang Chuanzhi , Qin Ruiru 
Published: March 2020

Abstract
In this paper, a thin, broadband and low frequency with high absorption (more than 90% absorption) radar absorber (RA) consisting of magnetic-type material substrate and double period frequency selective surface (FSS) is demonstrated. The geometric parameters were investigated for its contribution towards absorption by the finite-difference time domain (FDTD) method. The effects of incidence angles of electromagnetic radiation were also discussed. The simulation indicates that the use of the double period FSS makes a remarkable increase of operational bandwidth and moves the resonant frequency to the lower frequency comparison with single magnetic radar absorption materials (SMRA). Due to the excellent symmetric nature of the proposed structure, the reflectivity is insensitive to incident angle from 0° to 30°. The reflectance of RA lower than -10 dB (over 90% absorption) is obtained in the whole frequency range of L-band which is 1.5 times wider than the bandwidth of the same thickness SMRA when the structure thickness is only 2.62 mm. The simulation method is verified by comparison with the experiment in the literature. Thus, the presented RA breaks the limitation of the thickness (λ/4) for the traditional low-frequency band absorbing material and has wide application prospect in electromagnetic shielding and low-frequency stealth.
Preparation of Ferrite Fe3O4 and Its Electromagnetic Wave Absorption Properties
Authors: Yang Fuli , Hou Xingzhe , Wang Lirui , Li Youjiang , Yu Miao 
Published: March 2020

Abstract
Ferrite materials have good frequency characteristics. Their relative permeability is large and relative permittivity is small. These make it suitable for matching layer and have a good application prospect in broadening the absorption bandwidth. In this paper, ferrite was prepared by a simple chemical precipitation-dehydration method, and the ferrite Fe3O4 particles with 40% mass fraction were mixed with paraffin to form a ring test sample. The experimental results show that the as-prepared sample at higher temperatures has more stable nucleation and fewer defects, so it has more significant electromagnetic wave absorption performance. The minimum reflection loss is about - 44 dB, and the electromagnetic absorption band with the reflection loss RL less than - 10 dB is located at 12.5-14.1 GHz (3 mm) and 6.5-8.1 GHz (5 mm), respectively.
Study on Electrochemistry of Composite Electrode of Nano Reticular MoS2/RuO2
Authors: Lu Yun , Ke Jiancheng , Wang Wei , Wang Ruonan , Wang Li 
Published: March 2020

Abstract
Nano Reticular MoS2 is prepared in the hydrothermal method. By means of hydrothermal method, the cathode material of composite electrode of MoS2/RuO2 is prepared. For all kinds of prepared samples, physical characterization analysis, such as SEM and XRD, and electrochemistry tests, such as cyclic voltammetry, alternating-current impedance and galvanostatic charge-discharge, are conducted. The test results show that the addition of a small amount of molybdenum disulfide improves the specific capacity of composite electrode, lowers alternating equivalent impedance and improves conservation ratio of specific capacity. When the doping content of molybdenum disulfide is 25%, specific capacity of binary composite electrode can reach 413 F/g and equivalent alternating-current impedance is equal to 0.665Ω. By means of 800 charge-discharge cycles, specific capacity still remains around 87%.
Study on Strain Test Law of the Semi-rigid base Asphalt Pavement
Authors: Liu Feng , Wu Chuanhai , Li Shanqiang , Xu Xinquan 
Published: March 2020

Abstract
In order to grasp the similarities and differences in the experimental strain law of different types of semi-rigid base asphalt pavement, based on the Yunluo highway durability test pavement, the strain monitoring system, temperature monitoring system and humidity monitoring system of the full-scale pavement were constructed, and corresponding test plans were formulated. Through the test scheme, the strain response laws of different structural layers of two asphalt pavements were obtained. Through the comparative analysis with the relevant theoretical analysis results, the rationality and credibility of the strain layout scheme and test scheme of the Yunluo durability test pavement were confirmed. Through the analysis of the measured strain data, it was verified that the graded crushed rock layer did have a decentralized effect on the load. At the same time, it was also confirmed that when the same pavement material was in different structural layers, its mechanical response under load was different.