Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture最新文献_第3页

Effects of the processing parameters and laser textures in friction stir spot welding of Al alloy and polyimide joints 搅拌摩擦点焊铝合金和聚酰亚胺接头的加工参数和激光纹理的影响

IF 2.6 3区工程技术

Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture Pub Date : 2024-05-17 DOI: 10.1177/09544054241252859

Jicheng Gao, Xin Mei, Jiachen Dong, Junke Jiao

引用次数: 0

Research on cobalt-molybdic sulfide composite coatings deposited by magnetic jet electrodeposition under different magnetic field intensities 不同磁场强度下通过磁喷射电沉积沉积钴-硫化钼复合涂层的研究

IF 2.6 3区工程技术

Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture Pub Date : 2024-05-17 DOI: 10.1177/09544054241253022

Wei Jiang, Wenwei Cheng, Junjie Li, Fuwei Wang, Daoyang Yu, Yuanlong Chen

{"title":"Research on cobalt-molybdic sulfide composite coatings deposited by magnetic jet electrodeposition under different magnetic field intensities","authors":"Wei Jiang, Wenwei Cheng, Junjie Li, Fuwei Wang, Daoyang Yu, Yuanlong Chen","doi":"10.1177/09544054241253022","DOIUrl":"https://doi.org/10.1177/09544054241253022","url":null,"abstract":"Co-MoS2 composite coatings were deposited by the magnetic jet electrodeposition under different magnetic field intensities. The growth orientation and deposition mechanism of Co-MoS2 composite coatings under magnetic jet electrodeposition were analyzed based on the weak adsorption theory of nanocomposite co-deposition. Research showed that the coating topography changed from a blade-like structure to a cellular structure, and the cellular structure became a granular protrusion structure with increase of the magnetic field intensity. Compared with Co-MoS2 composite coating in jet electrodeposition, the orientation of Co shifted from (110) to (101) as the magnetic field intensity increased in magnetic jet electrodeposition. The adhesion, microhardness, adhesion, corrosion and wear resistance of the composite coatings were enhanced, which was attributed to the influence of the magnetic field on the growth orientation of the composite coating and the coordinated lubrication effect in the Co-MoS2 composite coating.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141126805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vision-based robotic grasping using faster R-CNN–GRCNN dual-layer detection mechanism 利用更快的 R-CNN-GRCNN 双层检测机制实现基于视觉的机器人抓取功能

IF 2.6 3区工程技术

Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture Pub Date : 2024-05-17 DOI: 10.1177/09544054241249217

Jianguo Duan, Liwen Zhuang, Qinglei Zhang, Jiyun Qin, Ying Zhou

{"title":"Vision-based robotic grasping using faster R-CNN–GRCNN dual-layer detection mechanism","authors":"Jianguo Duan, Liwen Zhuang, Qinglei Zhang, Jiyun Qin, Ying Zhou","doi":"10.1177/09544054241249217","DOIUrl":"https://doi.org/10.1177/09544054241249217","url":null,"abstract":"Visual grasping technology plays a crucial role in various robotic applications, such as industrial automation, warehousing, and logistics. However, current visual grasping methods face limitations when applied in industrial scenarios. Focusing solely on the workspace where the grasping target is located restricts the camera’s ability to provide additional environmental information. On the other hand, monitoring the entire working area introduces irrelevant data and hinders accurate grasping pose estimation. In this paper, we propose a novel approach that combines a global camera and a depth camera to enable efficient target grasping. Specifically, we introduce a dual-layer detection mechanism based on Faster R-CNN–GRCNN. By enhancing the Faster R-CNN with attention mechanisms, we focus the global camera on the workpiece placement area and detect the target object within that region. When the robot receives the command to grasp the workpiece, the improved Faster R-CNN recognizes the workpiece and guides the robot towards the target location. Subsequently, the depth camera on the robot determines the grasping pose using Generative Residual Convolutional Neural Network and performs the grasping action. We validate the feasibility and effectiveness of our proposed framework through experiments involving collaborative assembly tasks using two robotic arms.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141127401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Q-learning based scheduling method for continuous pickling process of titanium strips 基于 Q 学习的钛带连续酸洗工艺调度方法

IF 2.6 3区工程技术

Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture Pub Date : 2024-05-16 DOI: 10.1177/09544054241252892

Biao Yang, Yuyi Shi, Zhaogang Wu

{"title":"Q-learning based scheduling method for continuous pickling process of titanium strips","authors":"Biao Yang, Yuyi Shi, Zhaogang Wu","doi":"10.1177/09544054241252892","DOIUrl":"https://doi.org/10.1177/09544054241252892","url":null,"abstract":"This article addresses the energy consumption optimization problems of the pickling process for titanium strip manufacturing. The hybrid flow shop scheduling schemes for the pickling process of titanium strips are designed, and a novel shop scheduling method based on reinforcement learning is proposed for the pickling process of titanium strips. In the scheduling scheme, the pickling chemical treatment process of titanium strips are described as an asymmetric hybrid flow shop scheduling problem (AHFSP), and a mathematical model containing a temperature structure is established with the optimization objectives of minimizing pickling time and energy consumption. Based on the proposed scheduling scheme, a novel shop scheduling method based on reinforcement learning for the titanium strip pickling process is proposed. First, a mixed integer linear programing model for the mixed flow shop scheduling problem is established. Second, the flow shop scheduling problem with sequential energy consumption decisions is approximated as an asymmetric traveling sales-man problem (ATSP). Finally, the ATSP is described as a Markov decision processes (MDP), and a Q-learning based scheduling method for titanium strip pickling shops is proposed. Finally, the effectiveness of the proposed method is verified by examples, and the scheduling scheme can reduce the energy consumption by 16.61% on average while maintaining the schedule, which improves the productivity and economic efficiency.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140970203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Joint prediction method for strip thickness and flatness in hot strip rolling process: A combined multi-indicator Transformer with embedded sliding window 热连轧工艺中板带厚度和平整度的联合预测方法：带嵌入式滑动窗口的组合式多指标变压器

IF 2.6 3区工程技术

Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture Pub Date : 2024-05-11 DOI: 10.1177/09544054241249221

Qingquan Xu, Jie Dong, Kai-xiang Peng

{"title":"Joint prediction method for strip thickness and flatness in hot strip rolling process: A combined multi-indicator Transformer with embedded sliding window","authors":"Qingquan Xu, Jie Dong, Kai-xiang Peng","doi":"10.1177/09544054241249221","DOIUrl":"https://doi.org/10.1177/09544054241249221","url":null,"abstract":"Thickness and flatness are important quality indicators for strip. It is important that the rapid and accurate prediction of the exit thickness and flatness for the optimal control of the hot strip rolling process. Due to the fast and long rolling process, there are time delays, non-linearity and strong coupling among the variables, which cause difficulties in the establishment of prediction models. In this paper, the variables related to thickness and flatness are selected by analyzing the rolling process mechanism and data. Based on the data related to the rolling quality, a rolling exit thickness and flatness joint prediction model combined multi-indicator Transformer with embedded sliding window (SW-MTrans) is proposed. First, a sliding window is embedded into the input layer of the model in order to address the effect of the time delay among variables. Then a Transformer network is improved to achieve accurate prediction of thickness and flatness simultaneously. It is verified that the proposed method can predict the thickness and flatness at the same time with higher prediction accuracy and generalization ability compared with other methods through actual production data. The mean absolute error (MAE) for thickness prediction was reduced by 19.37% and MAE for flatness prediction was reduced by 14.03% compared to the existing prediction model.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140987806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fracture-free cut surface characteristics of aluminum alloy sheet (AA5083-H112) using cryogenic press-shaving process 使用低温压剃工艺加工铝合金板（AA5083-H112）的无断裂切割表面特性

IF 2.6 3区工程技术

Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture Pub Date : 2024-05-11 DOI: 10.1177/09544054241249774

Saowalak Kongiang, Siriporn Rojananan, S. Thipprakmas

{"title":"Fracture-free cut surface characteristics of aluminum alloy sheet (AA5083-H112) using cryogenic press-shaving process","authors":"Saowalak Kongiang, Siriporn Rojananan, S. Thipprakmas","doi":"10.1177/09544054241249774","DOIUrl":"https://doi.org/10.1177/09544054241249774","url":null,"abstract":"Of late, aluminum alloy sheets are being increasingly used in the fabrication of automotive, marine, and aircraft parts. Typically, a metal-forming process is used to produce these parts. However, the fracture-free cut surface characteristics of these parts are still limited by the die cutting process, and a secondary operation, such as machining, is needed to overcome this limitation. In this study, the use of cryogenic temperatures in press shaving was investigated. In the shearing operation, the cryogenic temperature influenced the ratios of the die-roll, smooth-surface, and fracture-to-material thickness, particularly for the fracture texture. Applying cryogenics in the shearing process increased the smoothness of the surface by approximately 50%, and the concave feature formed on the sheared workpiece was approximately 45% deep. Additionally, the hardness under cryogenic-temperature condition was approximately 15% higher than that at room temperature. However, the shearing force increased by approximately 30%. With the shaving operation, the volume of the shaving allowance was reduced owing to the deeper concave features. This resulted in a downward movement of the shaving allowance during the shaving operation, allowing easier sliding along the punch face and easier bending underneath the punch face. Consequently, tearing could be prevented, and the shearing phase of the shaving operation could be delayed. The results revealed that compared with the conventional press-shaving process, in which tearing and fracture of approximately 0.393 mm were generated, the application of cryogenic temperature to the press-shaving process delayed the tearing and prevented fracture, thereby achieving a fracture-free cut surface characteristic.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140987740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel approach of stability and topography prediction in five-axis ball-end milling process through workpiece-edge-coupling 通过工件边缘耦合实现五轴球端铣削过程稳定性和形貌预测的新方法

IF 2.6 3区工程技术

Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture Pub Date : 2024-05-08 DOI: 10.1177/09544054241245762

Shuiyuan Wu, Dongju Chen, Ri Pan, Jinwei Fan, Yuhang Tang

{"title":"A novel approach of stability and topography prediction in five-axis ball-end milling process through workpiece-edge-coupling","authors":"Shuiyuan Wu, Dongju Chen, Ri Pan, Jinwei Fan, Yuhang Tang","doi":"10.1177/09544054241245762","DOIUrl":"https://doi.org/10.1177/09544054241245762","url":null,"abstract":"By studying the workpiece-edge-coupling (WEC) in five-axis ball-end milling, the contact characteristics between the workpiece and edge curve are analyzed, and the chip model is extracted and simplified. The edge curve involved in the cutting process of each edge are calculated at each time and a new instantaneous numerical chip thickness model is established. Then the milling forces and stability lobe diagram (SLD) are calculated in following cut process with lead and tilt angle. The milling forces and SLD of lead angle at 15° and tilt angle at −15° are verified by comparing with Otzurk model as references, and it is found the SLD of WEC model can reflect the unstable points more properly than that of Otzurk model. Also the vibration in [Formula: see text] and [Formula: see text] directions show a divergence trend, which proves the high precision for the new algorithm adapted to the stability prediction of five-axis ball-end milling process. In addition, the surface topography is acquired considering lead and tilt angle as well as forced vibration, and the result is consistent with the experiment in the existing literature. It is found that the milling forces, SLD and surface topography show the same variation trend with the increase of lead and tilt angle. Besides, the stability region significantly expands and the surface topography improves by applying positive tilt angle other than the negative. Then, under the conditions of positive lead and tilt angle, increasing lead angle and decreasing tilt angle reduces the milling force, expands the stability region of SLD and improve the surface topography. The optimized tool posture is acquired by the coincident analysis of milling force, SLD and surface topography under different lead and tilt angle.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140999029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of filler orientation on mechanical and thermal properties of microwave absorbent 3D printed polycaprolactone/carbonyl iron particle composites 填料取向对微波吸收三维打印聚己内酯/羰基铁颗粒复合材料机械性能和热性能的影响

IF 2.6 3区工程技术

Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture Pub Date : 2024-05-02 DOI: 10.1177/09544054241249226

Usharani Rath, P. M. Pandey

{"title":"Effect of filler orientation on mechanical and thermal properties of microwave absorbent 3D printed polycaprolactone/carbonyl iron particle composites","authors":"Usharani Rath, P. M. Pandey","doi":"10.1177/09544054241249226","DOIUrl":"https://doi.org/10.1177/09544054241249226","url":null,"abstract":"A thorough investigation was conducted in the present work on the mechanical and thermal characteristics of polycaprolactone/carbonyl iron particle composites. For composite fabrication, 3D printing technique was utilized. The fabricated composites were categorized as oriented, non-oriented and polycaprolactone samples based on orientation and concentration of filler particle. To evaluate the effect of orientation of carbonyl iron particle, two orientation directions, viz. parallel orientation, and perpendicular orientation with respect to loading direction were tried. The sample with parallel orientation exhibited the highest tensile strength followed by 90° orientation and pure polycaprolactone samples respectively. Oriented composites exhibited elevated dynamic modulus in comparison to the composites without orientation. The oriented composites demonstrated stiffness and tensile strength in the order of 13.66 ± 0.94 MPa and 3.79 ± 0.26 MPa respectively. The proposed methodology in the present study can be used to align carbonyl iron fillers in polymer matrix to tailor the mechanical, viscoelastic, and degradation properties.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141019087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Issues of gas film stability with performance characteristics in u-ECDM: A review of existing approaches and preliminary investigation on proposed stable & sustainable approach u-ECDM 中的气膜稳定性与性能特征问题：对现有方法的综述以及对拟议的稳定和可持续方法的初步研究

IF 2.6 3区工程技术

Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture Pub Date : 2024-05-02 DOI: 10.1177/09544054241249205

Dil Bahar, A. Dvivedi, Pradeep Kumar

{"title":"Issues of gas film stability with performance characteristics in u-ECDM: A review of existing approaches and preliminary investigation on proposed stable & sustainable approach","authors":"Dil Bahar, A. Dvivedi, Pradeep Kumar","doi":"10.1177/09544054241249205","DOIUrl":"https://doi.org/10.1177/09544054241249205","url":null,"abstract":"Micro-featured devices (made of glass and its composites) are becoming increasingly necessary for Micro Electro-Mechanical Systems (MEMS) and healthcare devices with the emergence of technology. Due to limitations of existing methods, Micro Electro Chemical Discharge Machining (μ-ECDM) is an evolving technique for difficult to micro machine materials like glass. However, improper flushing and unstable electrolytic conditions in the processing zone percolates the efficacy, accuracy, and repeatability of μ-ECDM. Consequently, deteriorating the sustainability and industrial feasibility of this process. To cope up with these problems, various approaches like ultrasonic assistance, rotary mode, magneto hydrodynamic are integrated and investigated with μ-ECDM in the literature. Although these approaches achieved the intended objectives but do not assure the stability and sustainability of the process, which are essential for industrial feasibility in the present scenario. The present review has stressed upon the effects of existing approaches on gas film formation, discharge characteristics and performance outcomes. Systematic review methodology indicated the extensive usage of ultrasonic vibrations in μ-ECDM and, the studies on the stability/sustainability of μ-ECDM process are neglected. According to literature and preliminary investigation, problems pertaining to the rising electrolyte temperature and heterogeneous electrolyte concentration are the attributed reasons, which affects the stability as well as sustainability. Therefore, the present review proposed an innovative approach to achieve the stability and sustainability of μ-ECDM process by controlling the electrolytic conditions (termed as controlled-ECDM). A preliminary experimental investigation witnessed the enhancement of process performance and quality characteristics in controlled-ECDM.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141017882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A non-uniform lattice design method for lightweight structures in 3D printing 用于 3D 打印轻质结构的非均匀晶格设计方法

IF 2.6 3区工程技术

Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture Pub Date : 2024-05-02 DOI: 10.1177/09544054241245761

Zhengji Zhong, Ciming Shen, Bo Li

{"title":"A non-uniform lattice design method for lightweight structures in 3D printing","authors":"Zhengji Zhong, Ciming Shen, Bo Li","doi":"10.1177/09544054241245761","DOIUrl":"https://doi.org/10.1177/09544054241245761","url":null,"abstract":"Lightweight design is an essential topic in aerospace, automotive and other fields. In automobile manufacturing, the engine connecting rod is one of the main components; its lightweight design has a high reference value. And 3D printing provides a feasible solution for designing and manufacturing lightweight structures. Unlike the traditional geometrically homogeneous point design, this study offers a non-homogeneous point design method based on the spatial stress state of additively manufactured components. After numerical simulation of quasi-static stresses on a model of an engine connecting rod, finite element grid cells with different stress values are replaced by lattice cells with different specific stiffnesses at similar local stress levels. The overall specific stiffness of the structure is further improved by continuing the optimized design with the corresponding gradient-type reinforcement of the non-uniform lattice structure. The basic idea of this design is to perform non-uniform adaptive filling of solid parts under localized loading by employing different types of unit cells. Stereolithography 3D printing technology prepares the engine lattice structural parts for quasi-static compression comparison experiments and fracture analysis after failure. The conclusions show that the engine connecting rod members with non-homogeneous lattice have more excellent overall mechanical properties than homogeneous lattice members. This work demonstrates the feasibility of such design methods for 3D printing lightweight structures and optimization.","PeriodicalId":20663,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141020017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0