With the development of society, the contradiction between man and nature is becoming more and more obvious. The rapid development of industry and agriculture has caused serious soil pollution, among which the main po...With the development of society, the contradiction between man and nature is becoming more and more obvious. The rapid development of industry and agriculture has caused serious soil pollution, among which the main pollutants include the discharge of pesticides and chemical wastes. In this paper, the current methods of microbial remediation in soil are analyzed. The methods of microbial remediation have many advantages, including high efficiency, low cost, simple access, and not easy to cause secondary pollution to the ecology.展开更多
为解决纯立方刚度非线性能量阱(Nonlinear Energy Sink,NES)在竖直方向工作时,因重力影响造成的激活阈值过高问题,在中心质量块与NES下底座之间引入支撑弹簧单元,从而构造出一种非对称刚度非光滑NES,通过试验研究该NES的动力学响应。对...为解决纯立方刚度非线性能量阱(Nonlinear Energy Sink,NES)在竖直方向工作时,因重力影响造成的激活阈值过高问题,在中心质量块与NES下底座之间引入支撑弹簧单元,从而构造出一种非对称刚度非光滑NES,通过试验研究该NES的动力学响应。对比分析在简谐激励下非光滑NES与纯立方刚度NES的激活阈值差异。分析水平弹簧刚度和中心质量块质量两个参数对NES激活阈值的影响。结果表明,支撑弹簧单元能够有效降低纯立方刚度NES的激活阈值;通过合理控制水平弹簧刚度和质量块质量,可以使非光滑NES更好地应用于不同频带的减振。展开更多
文摘With the development of society, the contradiction between man and nature is becoming more and more obvious. The rapid development of industry and agriculture has caused serious soil pollution, among which the main pollutants include the discharge of pesticides and chemical wastes. In this paper, the current methods of microbial remediation in soil are analyzed. The methods of microbial remediation have many advantages, including high efficiency, low cost, simple access, and not easy to cause secondary pollution to the ecology.
文摘为解决纯立方刚度非线性能量阱(Nonlinear Energy Sink,NES)在竖直方向工作时,因重力影响造成的激活阈值过高问题,在中心质量块与NES下底座之间引入支撑弹簧单元,从而构造出一种非对称刚度非光滑NES,通过试验研究该NES的动力学响应。对比分析在简谐激励下非光滑NES与纯立方刚度NES的激活阈值差异。分析水平弹簧刚度和中心质量块质量两个参数对NES激活阈值的影响。结果表明,支撑弹簧单元能够有效降低纯立方刚度NES的激活阈值;通过合理控制水平弹簧刚度和质量块质量,可以使非光滑NES更好地应用于不同频带的减振。
