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一种小型快速制卡方案
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作者 王思文 《中国现代教育装备》 2003年第4期64-65,共2页
随着信息化技术的快速发展以及国家"金卡工程"全面启动,各种智能卡的使用量呈上升趋势.这就带动了制卡技术的快速革新,随着喷墨制卡技术和小型层压技术的诞生,一种小型快速的制卡解决方案应运而生.
关键词 智能 制卡方法 方案流程 食堂管理系统 喷墨
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以“卡”为载体 开展研究性学习
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作者 罗树庚 《中小学教学研究》 2002年第3期4-5,共2页
关键词 小学 研究性教学 科学家 制卡方法 课余时间
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Growth Mechanism of Microcrystalline Silicon Films by Scaling Theory and Monte Carlo Simulation 被引量:1
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作者 訾威 周玉琴 +1 位作者 刘丰珍 朱美芳 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2008年第8期1465-1468,共4页
Hydrogenated microcrystalline silicon (~c-Si:H) films with a high deposition rate of 1.2nm/s were prepared by hot-wire chemical vapor deposition (HWCVD). The growth-front roughening processes of the μc-Si..H fil... Hydrogenated microcrystalline silicon (~c-Si:H) films with a high deposition rate of 1.2nm/s were prepared by hot-wire chemical vapor deposition (HWCVD). The growth-front roughening processes of the μc-Si..H films were investi- gated by atomic force microscopy. According to the scaling theory, the growth exponent β≈0.67, the roughness exponent α≈0.80,and the dynamic exponent 1/z = 0.40 are obtained. These scaling exponents cannot be explained well by the known growth models. An attempt at Monte Carlo simulation has been made to describe the growth process of μc-Si: H film using a particle reemission model where the incident flux distribution,the type and concentration of growth radical, and sticking,reemission,shadowing mechanisms all contributed to the growing morphology. 展开更多
关键词 μc-Si:H growth mechanism scaling theory Monte Carlo simulations reemission process
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A molding method to fabricate the waveguide multilayer card 被引量:1
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作者 ZHOU Wang-ren LIANG Zhong-cheng GU Min-fen 《Optoelectronics Letters》 EI 2008年第2期153-154,共2页
Waveguide multilayer optical card (WMOC) is a new kind of three-dimensional storage device. A method of fabricating the WMOC using the molding technique is introduced in this paper. The fabrication of WMOC mainly incl... Waveguide multilayer optical card (WMOC) is a new kind of three-dimensional storage device. A method of fabricating the WMOC using the molding technique is introduced in this paper. The fabrication of WMOC mainly includes data writing with hot embossing method and multilayer bonding with PDMS material. The structure of the WMOC is consisted with Polycarbonate (PC) as the core layer material and Polydimethylsiloxane (PDMS) as cladding layer. The experimental results demonstrate that the molding fabrication method is feasible and effective. 展开更多
关键词 波导 多层 方法 结构
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A novel reaching law approach of quasi-sliding-mode control for uncertain discrete-time systems 被引量:4
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作者 袁雷 沈建清 +1 位作者 肖飞 王恒利 《Journal of Central South University》 SCIE EI CAS 2012年第9期2514-2519,共6页
A novel discrete-time reaching law was proposed for uncertain discrete-time system,which contained process noise and measurement noise.The proposed method reserves all the advantages of discrete-time reaching law,whic... A novel discrete-time reaching law was proposed for uncertain discrete-time system,which contained process noise and measurement noise.The proposed method reserves all the advantages of discrete-time reaching law,which not only decreases the band width of sliding mode and strengthens the system robustness,but also improves the dynamic performance and stability capability of the system.Moreover,a discrete-time sliding mode control strategy based on Kalman filter method was designed,and Kalman filter was employed to eliminate the influence of system noise.Simulation results show that there is no chattering phenomenon in the output of controller and the state variables of controlled system,and the proposed algorithm is also feasible and has strong robustness to external disturbances. 展开更多
关键词 discrete-time system quasi-sliding-mode control discrete-time reaching law Kalman filter
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Stability,detonation properties and pyrolysis mechanisms of polynitrotriprismanes C_6H_(6-n)(NO_2)_n (n=1-6)
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作者 唐忠海 欧阳永中 +1 位作者 梁逸曾 饶力群 《Journal of Central South University》 SCIE EI CAS 2011年第5期1395-1401,共7页
To further test whether polynitriprismanes are capable of being potential high energy density materials (HEDMs), extensive theoretical calculations were carried out to investigate on a series of polynitrotriprisman... To further test whether polynitriprismanes are capable of being potential high energy density materials (HEDMs), extensive theoretical calculations were carried out to investigate on a series of polynitrotriprismanes (PNNPs): C6H6-.(NO2). (n=1-6) Heats of formation (HOFs), strain energies (SE), and disproportionation energy (DE) were obtained using B3LYP/6-311+G(2df, 2p)//B3LYP/6-31G* method by designing different isodesmic reactions, respectively. Detonation properties of PNNPs were obtained by the well-known KAMLET-JACOBS equations, using the predicted densities (p) obtained by Monte Carlo method and HOFs. It is found that they increase as the number of nitro groups n varies from 1 to 6, and PNNPs with n〉4 have excellent detonation properties The relative stability and the pyrolysis mechanism of PNNPs were evaluated by the calculated bond dissociation energy (BDE). The comparison of BDE suggests that rupturing the C--C bond is the trigger for thermolysis of PNNPs. The computed BDE for cleavage of C--C bond (88.5 kJ/mol) further demonstrates that only the hexa-nitrotriprismane can be considered to be the target of HEDMs. 展开更多
关键词 high energy density materials polynitrotriprismanes heats of formation strain energies disproportionation energy bond dissociation energy
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Pressure-tracking control of a novel electro-hydraulic braking system considering friction compensation 被引量:11
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作者 雍加望 高峰 +1 位作者 丁能根 HE Yu-ping 《Journal of Central South University》 SCIE EI CAS CSCD 2017年第8期1909-1921,共13页
This work presents an integrated pressure-tracking controller for a novel electro-hydraulic brake(EHB) system considering friction and hydraulic disturbances. To this end, a mathematical model of an EHB system, consis... This work presents an integrated pressure-tracking controller for a novel electro-hydraulic brake(EHB) system considering friction and hydraulic disturbances. To this end, a mathematical model of an EHB system, consisting of actuator and hydraulic sub-systems, is derived for describing the fundamental dynamics of the system and designing the controller. Due to sensor inaccuracy and measurement noise, a Kalman filter is constructed to estimate push rod stroke for generating desired master cylinder pressure. To improve pressure-tracking accuracy, a linear friction model is generated by linearizing the nonlinear Tustin friction model, and the unmodeled friction disturbances are assumed unknown but bounded. A sliding mode controller is designed for compensating friction disturbances, and the stability of the controller is investigated using the Lyapunov method. The performance of the proposed integrated controller is evaluated with a hardware-in-the-loop(HIL) test platform equipped with the EHB prototype. The test results demonstrate that the EHB system with the proposed integrated controller not only achieves good pressure-tracking performance, but also maintains robustness to friction disturbances. 展开更多
关键词 electro-hydraulic brake brake-by-wire Kalman filter sliding mode control pressure-tracking friction compensation
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