bluuebunny/crossref_metadata_2025_split huggingface dataset:
Dissolving Microneedles for Transdermal Drug Delivery System
Authors: Bai Chenlin , Huo Cheng , Zhang Peiyu 
Published: November 2020

Abstract
There is a remarkable interest in research on dissolving micromachined needles or dissolving microneedle (DM) for transdermal drug delivery (TDD) because the devices with DMs can deliver drugs without leaving potentially dangerous residues of sharps waste after use. DMs encapsulated medications into microneedles built by water-soluble materials. Both drugs and microneedles can dissolve into the human tissues after the needles insert the skin. This paper reviewed the DM technology, including the materials and pathway for TDD, manufacturing techniques, and facing challenges. The materials and the pathways for TDD are described. Micromachining technology has been employed to manufacture dissolving microneedles including micromolding, lithography, and the droplet-born air blowing. Moreover, their challenges are discussed as well. Finally, the development of DMs has been also prospected.
Machine Vision Based Study on State Recognition of Milling Cutter
Authors: Wu Songlin , Xue Shaojun , Ning Ruobing , Zang Yingqi , Zhang Fei 
Published: November 2020

Abstract
As a major cutting tool in machining, the wear state of a milling cutter has a directly impact on machining quality and production efficiency. In order to detect the wear conditions of milling cutter, an inspection platform based on machine vision principle is designed. Hardware arrangement of the platform is introduced and the related equipment is analysed and selected accordingly. The milling cutter clamping device used in the platform is also designed. The collection of the measured milling cutter end image is realized successfully. The image processing methods of worn cutter are studied in detail. Adaptive greyscale adjustment and median filtering are used to decrease the noise in the image. Automatic threshold segmentation and edge extraction based on Sobel operator are also designed to achieve image pre-processing. A series of image processing experiments are carried out. The feature extraction algorithm for worn milling cutter end image is presented. Through comparative experiment, the presented machine vision measurement method is efficient.
Low Dose Mammography via Deep Learning
Authors: Zhu Guogang , Fu Jian , Dong Jianbing 
Published: November 2020

Abstract
X-ray mammography has been widely applied to breast cancer diagnosis due to its simplicity and reliability. However, X-ray will do harm to the health of patients or even cause cancer. Low dose mammography by reducing the tube current is an effective method to reduce radiation dose and has attracted more and more interests. In this paper, we implemented a method to improve the image quality of low dose mammography via deep learning. It is based on a convolutional neural network (CNN) and focuses on reducing the noise in low dose mammography. After training, it can obtain a high quality image from a low dose mammography image. This method is validated with experimental data sets obtained from The Cancer Imaging Archive (TCIA). It will promote the application of state-of-art deep learning technique in the field of low dose mammography.
Refinery Operations Optimization Integrated Production Process and Gasoline Blending
Authors: Li Ming 
Published: November 2020

Abstract
Operations optimization is key element of refinery production. The core production activities are operations of process units and product blenders. Operations Optimization of oil processing and product blending was researched in this paper. Using discrete time presentation, a MILP optimization model was built. By formulating operations of processing units and blending units, materials production and storage, energy generation and consumption, co-optimization of materials processing and product blending was realized. Utilizing the proposed model to optimize production operations of a refinery, simulation results show the formulation’s efficiency.
Research on Multi-objective Optimization Method of Central Air Conditioning Air Treatment System Based on NSGA-II
Authors: Li Xue , Li Shujiang , Jiao Hongyuan 
Published: November 2020

Abstract
In this paper, the composition, working principle and characteristics of the central air conditioning air treatment system are comprehensively analyzed, the energy consumption equipment of the air treatment system is established, the energy consumption model of the chilled water pump and fan is established, and the sum of the energy consumption models of the pump and fan is used as the air The total energy consumption model of the processing system is given, and the constraint conditions of the objective function are given. The characteristics of the evaluation index PMV describing the application of the human body’s cold and hot feeling and the PPD index characterizing the degree of dissatisfaction in the thermal environment are analyzed. The room comfort model with the smallest PPD value is established. Finally, the minimum total energy consumption of the air treatment system and the smallest PPD value are established Established a multi-objective optimization model. The NSGA-II algorithm is used to optimize the established multi-objective function, and the optimal solution set satisfying the two conditions is obtained.
Analysis on Degree of Freedom of Mechanism Based on Characteristics Description of Joint Motion Domain
Authors: Luo Jianguo , Wang Ting , Wang Yuqiang 
Published: November 2020

Abstract
The concepts includes input and output degrees of freedom of the mechanism are distinguished and redefined, The motion domain characteristics of translation and rotation joints can be described by planar six-dimensional topological graph, the output kinematic characteristics of RRPRR series branch chain and 3-RRPRR parallel mechanism are obtained by an example analysis, this new theory and method not only realize the quantitative display of the instantaneous degree of freedom of mechanism for the first time historically. In addition, the detailed process and form of the comprehensive transformation between the input and output motions of the mechanism are revealed historically for the first time and presented in the form of formulas. Theoretical definition and computational analysis method based on the six elements description of moving scope of joint newly proposed, which provides a set of scientific, universal, intuitive and effective theory and method for DOF analysis of arbitrary serial and parallel mechanisms.
Effect of Process Parameters on the Automobile Part in Hot Stamping Process
Authors: Ma Wenyu , Yao Ye , Yang Jianwei , Zhang Jun , Zhang Yongqiang 
Published: November 2020

Abstract
In this study, the influence of variables, including friction coefficient and initial blank temperature, on the formability in the hot stamping process of steel was analyzed. The formability indexes have maximum thickness thinning rate and springback. The friction coefficient is chosen between 0.05 and 0.4. The range of initial blank temperature varies from 825 to 995 °C. The combination of central composite design and response surface method was used to analyze the relationship between the variables and indexes. The maximum thinning rate of the hot formed part increases obviously with the increase of the friction coefficient. The maximum thinning rate increases slightly with the decrease of the initial blank temperature. The springback increases with the decrease of the friction coefficient significantly. The initial blank temperature affects the springback slightly.
Research on the Mechanical and Contact Performance of Marbles Screw Loading Device in Dry Disk Brakes
Authors: Yang Lingling , Ning Keyan , Ren Yiru , Yang Shilei , Ma Xinxing 
Published: November 2020

Abstract
The marbles screw loading device is an important structural part in dry disk brakes. With the increasing of braking load and temperature, the material, mechanical and contact performance become a great challenging for the brake design. To better understand the performance, the mechanical and contact performance of marbles screw loading device is investigated. The performance is investigated under different braking load. Then, the influence of typical parameters including geometrical, friction coefficient and temperature on the effective stress and strain is researched. The explicit finite element method is employed to build the numerical simulation model. Numerical simulation result shows that the contact area centre locates on the outside of the brake. The disc groove with 15°has better performance. The residual stress is an increasing with respect to the temperature for the decreasing of material performance. The marbles screw loading device could be largely improved by adjust the geometrical dimensions.
Damage Factor Analysis of Q235A Steel Based on Acoustic Emission Test
Authors: Cao Shuwen , Chen Chengcheng , Liu Qinlong 
Published: November 2020

Abstract
To analyse the damage of Q235A steel during axial tension, tensile experiments were carried out on several Q235A sheet specimens, the acoustic emission (AE) signals were collected at the same time. The properties of cumulative ringing counts of sheet specimens were analysed during tension process, the load-cumulative ringing counts curves were fitted, and the expression of steel damage factor was obtained by polynomial cumulative ringing counts. The cumulative ringing counts calculated by this expression under different loads are close to the experimental values, which prove that it is feasible to use the cumulative ringing counts of acoustic emission to represent the damage factors of Q235A steel during tensile process.
Design of King Grass Crusher Based on SCM Control
Authors: Li Zunxiang , Jiao Jing , Ou Zhongqing , Liu Xinpeng , Huang Xiaohong , Du Jihua 
Published: November 2020

Abstract
King grass is rich in nutriments and palatable, and has soft and succulent leaves, with high digestibility. It is one of the best green fodders for herbivore livestock and poultry. In the process of breading flocks and herds, the feed cost can be reduced largely by utilizing king grass rationally. King grass needs to be cut and ground for being used as feedingstuff. Conventional manual process consumes a large quantity of manpower and material resources, leads to the reduction of production efficiency, and brings about high labor intensity. In view of this, an automatic control king grass crusher high efficiency and practicability is designed, which integrates cutting and crushing. This machine is based on SCM, which realizes whole-process automatic control and rational coordination of pressure sensor with stepping motor for various movements, and can handle king grass crushing well.
Structural Design of Large Heavy-load Stone Cutting Robot
Authors: Wang Chenglin , Li Chunjiang , Zhao Lijun , Wang Shengxue 
Published: November 2020

Abstract
Large quantities of stone cutting are generally done using robots. The current stone cutting robot drives the cutting machine to move and complete the cutting through the manipulator, but its moving range is limited. In response to this problem, a large heavy-duty stone cutting robot was designed in this subject. According to the design requirements and the functions to be realized by the equipment, the detailed structural design of each component of the stone cutting robot was carried out, and the static analysis of the robot arm and arm was carried out using ANSYS to ensure the safe operation of the equipment. The D-H parameter method was used to establish the kinematics model of the stone cutting robot, the positive kinematics equation was obtained by using the homogeneous transformation matrix, and the inverse solution of the kinematics equation was combined with the algebraic method. The proposed design was reasonable through experiments.
Development of a High-precision Digital Display Torque Wrench
Authors: Xu Jian , Zhao Yinming , Chen Kexing 
Published: November 2020

Abstract
Thread connection is widely used in mechanical connection. Torque wrench can feedback tightening torque in real time, and can apply more accurate tightening torque, which is widely used in engineering. Some assembly lines in aerospace or military field the tightening accuracy need to reach 0.1%, comparing with the only 1% accuracy of ordinary working wrench, the high precision torque wrench is needed to apply the high accuracy torque in aerospace or military field. Two methods are introduced to improve the measurement accuracy of the torque wrench. One is to design the transducer with pure torsional transformation when it is used. The other is to apply linearity correction to the transducer by circuit software. The results shows the accuracy of the torque wrench is 0.1%, which is much higher than ordinary work wrench.
Design of Detection Probe for Weak Radioactive Substance
Authors: Yang Bin , Zhao Hongtao , Li Yan , Li Gang , Wu Peng 
Published: November 2020

Abstract
In order to improve the detection efficiency and sensitivity of the detector for weak radioactive substances, a detector probe has been designed which with double photomultiplier & NaI (Tl), by using of multi pulse coincidence measurement and energy spectrum recognition algorithm to realize the fast detection of weak radioactive substances. Through the amplification factor, data calibration and detection threshold experimental research and data comparison found that, the detection efficiency and sensitivity of the detector for weak radioactive substances are improved, this also proves the effectiveness of the design of detection probe.
Optimized Design of FIR Filter Based On FPGA
Authors: Fu Qihui , Zhang Guoqin , Wu Xiushan , Yan Shubin 
Published: November 2020

Abstract
Based on the field programmable gate arrays (FPGA), a low area and high speed FIR filter is proposed and designed. The multiplication modules were replaced by adders and shift registers in the proposed architecture. This is possible because a coefficient approximation is performed, using the algorithm that computes the coefficients like a sum-of-powers-of-two (SOPOT). Compared with the traditional method, the area of the 7-tap 12 bit FIR filter occupied is 75%smaller.
An Improved Defect Detection Method of Water Walls Using the WGAN
Authors: Zhang Yu , Lu Li , Wang Yuwei , Ding Yongsan , Yang Jia , Xu Zhongfeng , Ma Bo , Lin Xiaoyong 
Published: November 2020

Abstract
This paper proposes an improved water wall defect detection method using Wasserstein generation adversarial network (WGAN). The method aims to improve the problems of poor safety and high level of maintenance personnel required by traditional inspection methods, and improve the accuracy and safety of water wall defect detection through automated inspection. The WGAN is used to expand the water wall defect data. Then the extended data set and the original data set are loaded into a convolutional neural network for training, respectively. The results show that the accuracy of the expanded data set is significantly improved, which can achieve the industrial requirement of the thermal power generation.
A Fast Calculation Method for Bus Body Based on Equivalent Stiffness Element Method
Authors: Huang Xinshen , Li Hao , Zhang Zhenkun , Zheng Jianguo , Pei Hailong 
Published: November 2020

Abstract
In view of complex modeling and inefficient calculation at existing stage finite element analysis method in bus body skeleton analysis. This paper presents a method on simulating complex large section beams by equivalent stiffness element. Equivalent stiffness element model is analyzed theoretically. Experiments are carried out to verify that the equivalent stiffness element method can be used in rapid analysis and calculation for girder, body frame and body optimization. It not only reduces modeling complexity, but also improves calculation efficiency. To a certain extent, it can provide a better analysis method for large-scale vehicle modeling and simulation.
Vector Kinematics Modelling and Simulation Analysis of Half-rotating Walking Mechanism
Authors: Wang Yongming , Ma Tengfei , Xu Xuetan 
Published: November 2020

Abstract
In order to solve the stability problem existing in the robot mobile system based on the two-stage half-rotating mechanism, a swing balanced configuration is proposed. Combining the vector method and the D-H method, a forward kinematics modelling and analysis method for the half-rotating walking mechanism is proposed. First of all, using vector kinematics, according to the characteristics of the walking mechanism, combined with the D-H method to establish the relevant coordinate system and the transformation matrix between each coordinate system, derived the position vector, angular velocity vector, linear velocity vector and other relevant kinematic characteristic expressions of the key points of the mechanism, and calculated in MATLAB software to get its theoretical analytical curve. At the same time, the kinematics model of the half-rotating walking mechanism is established in the ADAMS software, and the ADAMS simulation results are compared with the theoretical analysis results. The two are basically consistent, which verifies the correctness of the forward kinematics modelling method of this half-turn walking mechanism.
Experimental Study on Shear Behavior of Reinforced Autoclaved Aerated Concrete Slab
Authors: Zhang Tianjun , Dai Jinzhen , Qin Shihong 
Published: November 2020

Abstract
Process two-points concentrate force load shearing trial for 6 ALC plates (Autoclaved aerated concrete reinforced plate), the article introduced the trial specimen structure, trial device and load scheme. This trial obtained the influence of the shear capacity of ALC plate like failure mode, load-deflection curve, stress (varying) distribution, steel types and shear span ratio. The research shown that: ①The reinforced ALC plate easily form the strong bending and weak shearing members, happen shear pressure failure when designed shear span ratio X=2.5, happen diagonal-tension failure, when designed shear span ratio X>5; ②If the oblique crack position close to the anchoring gusset or pass through anchoring section then maybe weaken the anchoring force and reduce the shearing strength of plate. Because of its brittle nature, anchorage failure must be avoid. Sufficient anchorage can theoretically be provided either by bond or by cross bars welded to the longitudinal reinforcement. ③For the calculation method of the shear bearing capacity of ALC without shear reinforcement with high strength longitudinal steel reinforcement, the technical code for the application of autoclaved aerated concrete in building in China is no longer applicable, EU standards calculated result are all less than the measured values, the method of international RILEM materials association is more suitable and the calculated value more close to the measured value.
Research on a New Type of Antifriction and Antiwear Cutting Fluid Based on Superlubricity Theory
Authors: Yang Yong , Li Jindong , Li Ang 
Published: November 2020

Abstract
Based on the superlubricity theory, a new type of cutting fluid with excellent anti-friction and anti-wear effects is developed. Using the existing superlubricity agent, several new environmentally friendly water-based cutting fluids have been formulated; Further, the high-speed cutting tests of a new type of cutting fluid were carried out for titanium alloy. Finally, a large number of comparative analyses were performed based on the test results. Studies have shown that the friction coefficient obtained using the cutting fluid with solid lubricant is generally large, however, the lower friction coefficient can be obtained when using the cutting fluid with glycerol-acid and hexadecyl dimethyl ammonium bromide, also the better cooling and lubricating effects were obtained.
Lost Circulation Mechanical Model and It’s Application in Permian Igneous Rocks in Shunbei Oilfield
Authors: Liu Shiyin , Li Shaoan 
Published: November 2020

Abstract
The Shunbei Oilfield is a major discovery of Sinopec in the ultra-deep marine carbonate rock field, and it will become the main battlefield for Sinopec to increase reserves and production. At present, the exploration and development of the Shunbei Oilfield is mainly concentrated on the No. 1 and No. 5 fault zones in the Shunbei area. Due to the complex geological structure, there are a series of drilling technical problems in drilling. Lost circulation will not only lose drilling fluid, produce non-productive time and affect drilling safety, but also limit drilling speed, which is one of the most headaches and difficult problems in drilling. To this end, scholars at home and abroad have carried out a lot of research and exploration, and developed a series of leak-proof and plug-in devices such as non-penetrant, elastic graphite, Form-A-block, fiber cement, water-absorbing resin, thermosetting resin, gel and chemical consolidation. Materials, and formed a variety of supporting process technologies. Granular, fibrous, and sheet composite bridging materials are most commonly used on the site, but ordinary bridging materials are resistant to temperature differences, easily carbonized at high temperatures, and the width of underground cracks needs to be clear when plugging, non-penetrants prevent Lost circulation of microfracture formations. It has poor leak-proof effect on large cracks, because of its low strength, expansion materials such as water-absorbent resin are better for plugging, but the pressure-bearing effect is poor, foreign Form-A-block and Chinese DTR are equivalent High water loss materials have good adaptability to cracks, but the pressure is generally low, fiber plugging methods such as fiber cement and thermosetting resin are complicated in process, high in risk and high in cost, gel plugging technology has good adaptability to plugging, but withstands temperature differences If it is not combined with other materials, it is easy to leak again in the later period due to the decrease in gel strength, chemical consolidation plugging technology has a high success rate in plugging, but the plugging construction time is relatively long. In summary, although great progress has been made in leak prevention and plugging technology at home and abroad, there is less research on igneous rocks, and it cannot meet the needs for leak prevention and plugging in igneous rock formations. Therefore, it is necessary to analyze the second Shunbei Oilfield in depth. Lost circulation characteristics of igneous rocks in the Mesozoic and the difficult points of preventing Lost circulation and plugging. Develop effective materials for preventing and plugging Lost circulation to improve the effect of preventing and plugging.
Investigation for the Thermodynamic Polarization Degradation of the BaTiO3 Crystal Thin Films
Authors: Han Yue , Sun Na , Sun Degui 
Published: November 2020

Abstract
According to the latest development of memory, it is found that the motion of ferroelectric domain wall is very important for the high-density non-volatile devices of ferroelectric materials. This paper mainly studies the microstructure of barium titanate (BaTiO3) crystal films with the molecular dynamics of crystal domain motion and then models the polarization degradation with the conservation of the nucleation energy-focusing and free energy thermodynamic processes in the crystalline domains. First, by the means of XRD diffractometer and JADE software, the crystal axis orientation of BaTiO3 thin film is analysed, and then the crystal axis orientation is determined by referring the published measurement results. Further, for the ferroelectric crystal BaTiO3 thin film, the thermodynamic process is studied and the temperature dependences of the polarization ratio with respect to the spontaneous polarization is modelled. Numerical simulations have shown the much higher temperature dependence on the nucleation energy than on the free energy in a domain wall system, leading to the possibility to reach a high polarization ratio with the optimal deposition conditions to control the local energy and the nucleation energy cost of crystalline domains.