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Comprehensive evaluation factor of optoelectronic properties for transparent conductive metallic mesh films Research Articles
Yilei Zhang, Jinxuan Cao, Zhengang Lu, Heyan Wang, Jiubin Tan,luzhengang@hit.edu.cn
Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 11, Pages 1532-1540 doi: 10.1631/FITEE.2000690
Keywords： 金属网栅；TOPSIS法；熵权法；综合评价因子；透明导电膜
Development of 8-inch Key Processes for Insulated-Gate Bipolar Transistor Article
Guoyou Liu,Rongjun Ding,Haihui Luo
Engineering 2015, Volume 1, Issue 3, Pages 361-366 doi: 10.15302/J-ENG-2015043
Based on the construction of the 8-inch fabrication line, advanced process technology of 8-inch wafer, as well as the fourth-generation high-voltage double-diffused metal-oxide semiconductor (DMOS+) insulated-gate bipolar transistor (IGBT) technology and the fifth-generation trench gate IGBT technology, have been developed, realizing a great-leap forward technological development for the manufacturing of high-voltage IGBT from 6-inch to 8-inch. The 1600 A/1.7 kV and 1500 A/3.3 kV IGBT modules have been successfully fabricated, qualified, and applied in rail transportation traction system.
Keywords： insulated-gate bipolar transistor (IGBT) high power density trench gate 8-inch rail transportation
Research Progress and Future Development of Nonferrous Biomedical Materials
Guan Shaokang, Zhu Shijie, ZhengYufeng, Wang Yunbing, Zhang Xingdong
Strategic Study of CAE 2023, Volume 25, Issue 1, Pages 104-112 doi: 10.15302/J-SSCAE-2023.01.008
Nonferrous biomedical materials have developed rapidly in recent years. A variety of new nonferrous biomedical materials and devices that adapt to different in vivo environments and tissues have been developed. It is of both theoretical and practical values to make research plans to improve the clinical application level of new nonferrous biomedical materials and devices. This study clarifies the key performance requirements of the nonferrous biomedical materials, regarding corrosion resistance, wear resistance, fatigue strength and toughness, and biocompatibility. The research progress, development trend, and scientific issues of nonferrous medical materials for permanent implants, biodegradable nonferrous medical materials, porous nonferrous medical materials, and surface modification of nonferrous medical materials are reviewed. After summarizing the future research directions of various nonferrous biomedical materials, this study proposes the following development suggestions: (1) strengthening basic research and the development of key core technologies, (2) establishing a collaborative innovation community that integrates industry, education, research, medicine, and supervision, (3) formulating relevant standards and evaluation norms, and (4) developing a highly skilled professional training system, thereby providing a guiding reference for developing the new material industry and relevant cutting-edge technologies.
Keywords： nonferrous biomedical materials nonferrous materials for permanent implants biodegradable nonferrous medical materials porous nonferrous medical materials surface modification of nonferrous medical materials
Chen Jing
Strategic Study of CAE 2007, Volume 9, Issue 5, Pages 11-16
The micro-mechanism of precious metals trapped in pyro-metallurgical processes by base metals or their mattes were discussed in present paper .It was forwarded that the reasons for trace amount of precious metals trapped into base metals or matteswere that the melted slag phases possessing very different structure and properties from that the melted base metal or matte phases.For the slag phase, its formation is thought depending on the covalent bonds and the ionic bonds between Si, O atoms and Ca2+, Mg2+, Fe2+ ions to tie up between each other .Because the bonding electrons in the slag phases are all thought as the localized electrons, the precious metal atoms are not stable among them .However, for the metal phase, its formation is thought depending on the metal bonds to bind up together the metal atoms.And because the electrons in the metal phases can move freely among the atoms, the precious metal atoms entering into the metal phase can cause the system free energy decreased .For the melted mattes phase, because it has high conductivities (between 103~104 S·cm -1) at the higher temperature, and its temperature coefficients present the negative values, its conductance belongs to the electron conductance .The properties of the matte are in fact similar with that of metal at their melted state, therefore precious metal atomswill enter into the matte phase, but not the slag phase in matte-smelting process .
Keywords： pyro-metallurgy；matte smelting；trapping；precious metals
Three Basic Laws for the Network Era and Capacity Evolution for Backbone Networks
Wei Leping
Strategic Study of CAE 2001, Volume 3, Issue 5, Pages 12-16
First this paper described the great challenge from the new era and its impacts on networks and indicated the huge capacity pressure faced by networks. Then, the paper discussed implications, effects and technical limits for the three basic laws which guide network era such as Moored Law, Optical Fiber Law and Metcalfe´s Law. Finally, the paper presented capacity evolution strategies for transmission links, transport nodes and service nodes in backbone networks, respectively.
Keywords： network capacity backbone network
Modeling and Analysis of Elevator System Based on Timed-Coloured Petri Net
Zong Qun,Dou Liqian,Cheng Yiju
Strategic Study of CAE 2004, Volume 6, Issue 12, Pages 51-55
In this paper, an elevator running model based on timed-coloured Petri net is proposed. The running of elevator is classified according to the model. The running of elevator is controlled by the command of controller. And the command of controller is composed of the color aggregates which have a connection with the running states of elevator. In the end, an example of the application of the model in single elevator system and the elevator group control system is given.
Keywords： Petri net timed-coloured Petri net the model of elevator the running of elevator
The Current Situation and Outlook of Scattered Metals
Zou Jiayan,Chen Shaochun
Strategic Study of CAE 2002, Volume 4, Issue 8, Pages 86-93
This paper summarizes the present situation and outlook of scattered metals(gallium, indium, germanium, thallium, selenium, tellurium and rhenium) including their geological resources, industry, uses and market both at home and abroad in recent years. It especially indicates that the scattered metals play an important part in devoloping economical construction and high-new technology, such as electronic components, semiconductors, indium-tin oxides,specility alloys,optoelectronic devices, and so on.
The paper also makes some proposals for developing scattersed metals industry as follows： protection of resources, rational exploitation of mines, reasonable production scale and coordination of development among factories and companies.
Keywords： scattered metals resources industry market
Ying-hui ZHONG, Shu-xiang SUN, Wen-bin WONG, Hai-li WANG, Xiao-ming LIU, Zhi-yong DUAN, Peng DING, Zhi JIN
Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 8, Pages 1180-1185 doi: 10.1631/FITEE.1601121
Keywords： High electron mobility transistors (HEMTs) Gate-recess Digital wet-etching Selective wet-etching
Study of the Behaviour of Precious Metals in Metallurgy Processes in Terms of Atomic Structure
Chen Jing
Strategic Study of CAE 1999, Volume 1, Issue 2, Pages 34-40
The differences of chemical characteristics of Fe, Co, Ni, Cu 3d and other eight precious metal elements in M group and Ⅷ group, together with that of precious metal elements of Ru, Rh, Pd, Ag 4d and Os, Ir, Pt, Au, 5d were analyzed in terms of atomic structure. This paper stated that their chemical stability increased from the left side to the right when transverse comparison was conducted and the chemical stability rank occurred as 3d≤4d＜5d when longitudinal comparison was carried out. From the practice of extraction metallurgy of precious metals from copper-sulphide nickel ores, the paper discussed the behaviour of precious metal elements in thermometallurgical processes such as baking-reduction smelting-oxygen blasting and hydrometallurgical processes such as electrolytic concentration, sulphuric acidification of anode slime, wet chloridification, pressured oxidification and optional reduction.
Keywords： atomic structure precious metals extractive metallurgy
Scientific and Technological Development Strategy for China’s Nonferrous Metal Mines
Yu Runcang,Tang Jian
Strategic Study of CAE 2005, Volume 7, Issue 10, Pages 1-4
In view of the characteristics of China's nonferrous mines, the paper proposes the basic thinking on the development of science and technology and the hierarchically developing objective, describes briefly the proposed main research fields, and puts forward several key research topics.
Keywords： nonferrous metal mines mining technique developing strategy for science and technology
Analysis of Influencing Factors on Transmission Ratio in Magnetic Metal Belt Transmission
Luo Shanming,Miao Xiexing
Strategic Study of CAE 2002, Volume 4, Issue 3, Pages 73-77
Magnetic metal belt transmission is a new one in which the initial tension no longer solely, but together with the magnetic attraction force produces the friction force. The influencing factors on transmission ratio are analyzed and numerically simulated in this paper, such as effective haulage force, initial tension, magnetic induction intensity, center distance, diameter of the smaller belt pulley and angle of contact. The change laws of transmission ratio along with these influencing factors are studied. The results show that the transmission ratio of magnetic metal belt transmission increases when magnetic induction density, initial tension and center distance increases, and decrease when angle of contact and diameter of the smaller belt pulley increases. It is pointed out that the angle of contact and diameter of the smaller belt pulley can be reduced accordingly because of the effect of magnetic force, and therefore the transmission ratio can increase by 3〜4 times compared with general belt transmission.
Keywords： belt transmission magnetism metal belt transmission ratio
Ziqi Yang, Zhongjie Wu, Shing Bo Peh, Yunpan Ying, Hao Yang, Dan Zhao
Engineering 2023, Volume 23, Issue 4, Pages 40-55 doi: 10.1016/j.eng.2022.07.022
Mixed-matrix membranes (MMMs), which combine porous materials with a polymeric matrix, have gained considerable research interest in the field of gas separation due to their complementary characteristics and cooperative activation. The tailorability and diversity of porous materials grant MMMs extendable functionalities and outstanding separation performance. To achieve the full potential of MMMs, researchers have focused on the rational matching of porous fillers with polymeric matrixes to achieve enhanced compatibility at the interfaces of these materials. In this review, we highlight state-of-the-art advances in combining metal–organic frameworks (MOFs) and metal–organic cages (MOCs) with polymeric matrixes to fabricate MMMs using different strategies. We further discuss the opportunities and challenges presented by the future development of MMMs, with the aim of boosting MMM fabrication with judicious material design and selection.
Keywords： Gas separation Metal–organic frameworks Metal–organic cages Mixed-matrix membranes Interfacial compatibility
Recent Science and Technology Frontier for Exploitation of Underground Metal Resources
Yu Runcang
Strategic Study of CAE 2002, Volume 4, Issue 9, Pages 8-11
With the development of rockmechanics, extensive application of computer in mining area and promotion by intersection of multi-course, mining starts entering the science field, being regarded as skill always. This paper discussed the recent science and technology at the frontier for exploitation of underground metal resources： digital control of mining environment, wasteless mining, ocean mining and coping with threat of rockburst in deep mining, that are of great importance to the development of mining course.
Keywords： mining metal resource digital control of mining environment wasteless mining
A Mini-Review on Metal Recycling from Spent Lithium Ion Batteries Review
Xiaohong Zheng, Zewen Zhu, Xiao Lin, Yi Zhang, Yi He, Hongbin Cao, Zhi Sun
Engineering 2018, Volume 4, Issue 3, Pages 361-370 doi: 10.1016/j.eng.2018.05.018
The rapid growth of lithium ion batteries (LIBs) for portable electronic devices and electric vehicles has resulted in an increased number of spent LIBs. Spent LIBs contain not only dangerous heavy metals but also toxic chemicals that pose a serious threat to ecosystems and human health. Therefore, a great deal of attention has been paid to the development of an efficient process to recycle spent LIBs for both economic aspects and environmental protection. In this paper, we review the state-of-the-art processes for metal recycling from spent LIBs, introduce the structure of a LIB, and summarize all available technologies that are used in different recovery processes. It is notable that metal extraction and pretreatment play important roles in the whole recovery process, based on one or more of the principles of pyrometallurgy, hydrometallurgy, biometallurgy, and so forth. By further comparing different recycling methods, existing challenges are identified and suggestions for improving the recycling effectiveness can be proposed.
Keywords： Spent lithium ion batteries Valuable metals Pretreatment Metal extraction Product preparation Recycling
Fabrication and characterization of typical nano-scale structures
Jiang Zhuangde,Wang Chenying,Yang Shuming
Strategic Study of CAE 2013, Volume 15, Issue 1, Pages 15-20
Three types of nano-scale structure have been fabricated and characterized using SEM, AFM, etc. In this paper, multilayer thin film deposition technique has been used to fabricate nano-scale structure with 20nm, 25 nm and 35 nm line-width. LER and LWR of nanoline are evaluated with an offline image analysis algorithm. The experimental results indicate that the LER/LWR of the lines is low and the uniform of the lines is high. EBL and ICP technique are employed to fabricate grating patterns with nominal height 220 nm. The result shows that the high frequency fluctuations of line edges after etching decrease, the correlation length increases and values of root mean square deviation (σ) increase. Single and multiple nano steps have been fabricated using FIB technique, and the relationship between the size of the Z-axis and energy of process are analyzed.
Title Author Date Type Operation
Comprehensive evaluation factor of optoelectronic properties for transparent conductive metallic mesh films
Yilei Zhang, Jinxuan Cao, Zhengang Lu, Heyan Wang, Jiubin Tan,luzhengang@hit.edu.cn
Journal Article
Development of 8-inch Key Processes for Insulated-Gate Bipolar Transistor
Guoyou Liu,Rongjun Ding,Haihui Luo
Journal Article
Research Progress and Future Development of Nonferrous Biomedical Materials
Guan Shaokang, Zhu Shijie, ZhengYufeng, Wang Yunbing, Zhang Xingdong
Journal Article
Discussion on the Micro-mechanism of Precious Metals Trapped inPyro-metallurgical Processes by Base Metals and Matte Phase
Chen Jing
Journal Article
Three Basic Laws for the Network Era and Capacity Evolution for Backbone Networks
Wei Leping
Journal Article
Modeling and Analysis of Elevator System Based on Timed-Coloured Petri Net
Zong Qun,Dou Liqian,Cheng Yiju
Journal Article
Two-step gate-recess process combining selective wet-etching and digital wet-etching for InAlAs/InGaAs InP-based HEMTs
Ying-hui ZHONG, Shu-xiang SUN, Wen-bin WONG, Hai-li WANG, Xiao-ming LIU, Zhi-yong DUAN, Peng DING, Zhi JIN
Journal Article
Study of the Behaviour of Precious Metals in Metallurgy Processes in Terms of Atomic Structure
Chen Jing
Journal Article
Scientific and Technological Development Strategy for China’s Nonferrous Metal Mines
Yu Runcang,Tang Jian
Journal Article
Analysis of Influencing Factors on Transmission Ratio in Magnetic Metal Belt Transmission
Luo Shanming,Miao Xiexing
Journal Article
Mixed-Matrix Membranes Containing Porous Materials for Gas Separation: From Metal–Organic Frameworks to Discrete Molecular Cages
Ziqi Yang, Zhongjie Wu, Shing Bo Peh, Yunpan Ying, Hao Yang, Dan Zhao
Journal Article
Recent Science and Technology Frontier for Exploitation of Underground Metal Resources
Yu Runcang
Journal Article
A Mini-Review on Metal Recycling from Spent Lithium Ion Batteries
Xiaohong Zheng, Zewen Zhu, Xiao Lin, Yi Zhang, Yi He, Hongbin Cao, Zhi Sun
Journal Article
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