机构

• 地理科学与资源研究所 [1]
• 长春光学精密机械与物... [1]
• 生态环境研究中心 [1]

采集方式

• OAI收割 [3]

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浏览/检索结果: 共3条，第1-3条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Research on the Theoretical Framework, Spatio-temporal Laws, and Driving Mechanism of Beautiful Human Settlements-A Case Study of the 14 Prefecture-Level Cities in Liaoning Province 期刊论文  OAI收割 SUSTAINABILITY, 2023, 卷号: 15, 期号: 2 作者:  Tian, Shenzhen;  Jin, Biyan;  Li, Hang;  Li, Xueming;  Yang, Jun   |  收藏  |  浏览/下载：16/0  |  提交时间：2023/03/03 beautiful human settlements  theoretical framework  three-state comprehensive  coexistence of dual core and ternary  multi-system guidance  comprehensive drive   城市化区域的生态风险评价方法与管控策略研究——以北京市为例 学位论文  OAI收割 北京: 中国科学院生态环境研究中心, 2020 作者:  刘长峰   |  收藏  |  浏览/下载：49/0  |  提交时间：2021/07/07 城市化，复合生态风险，生态风险概率，生态风险指数，蒙特卡洛模 拟，copula 模型，生态风险驱动与管控  Urbanization  Comprehensive Ecological Risk Assessment  Ecological Risk Probability  Ecological Risk Index  Monte Carlo Simulation  Copula Model  Ecological Risk Drive, Control And Management   LABTM control system based on FPGA (EI CONFERENCE) 会议论文  OAI收割 2nd International Conference on Mechatronics and Applied Mechanics, ICMAM 2012, December 8, 2012 - December 9, 2012, Taiwan 作者:  Wang Y.;  Yu P.;  Yu P.;  Wang Y.;  Wang Y. 收藏  |  浏览/下载：154/0  |  提交时间：2013/03/25 This paper presents the digital PI control method for design and simulation of a high precision limited angle brushless torque motor control system in Field Programmable Gate Array device (FPGA). The direct drive structures which are widely applied in many servo control fields. Matlab Xilinx System GeneratorR toolbox based on Fixed-Point Arithmetic is used to design the digital PI controller using DSP architecture  plot the responses of the control system and generate the VHDL source code. The control system model consists of a digital PI  a real LABTM  and a real absolute Inductosyn  encoder to rpm and position blocks. Through loading generated codes in process of the simulation that built by the digital discrete model  it is verified that the rising time of current loop is only 1.2ms  and rate loop is 8ms  overshoot is rarely 4.2%. Finally  the comprehensive positioning accuracy of system can reach up to 5 arc sec  and the rate jitter achieves 5% with the 4 arc sec accuracy absolute Inductosyn. (2013) Trans Tech Publications  Switzerland.