ID 原文 译文
2293 该单相全桥软开关逆变器可以向高开关频率的场合推广应用。 Therefore, the single-phase full-bridge soft-switching invertercan be applied at high switching frequency.
2294 卷筒纸印刷机折页机构是一种存在耦合的非线性齿轮系统。 web-offset press is a kind of coupling nonlinear dynamic system.
2295 运用集中质量法、牛顿第二定律、微分方程及级数理论和方法，考虑变啮合刚度、齿侧间隙、动态传递误差等非线性因素，建立卷筒纸印刷机折页机构齿轮系统单自由度非线性动力学模型。 We use the lumped mass method, New-ton's second law, the differential equations and series theory and method to establish the gear system nonlinear dynamic modeling of web-offset printing machine wherein the time-varying meshing stiffness, backlash, dynamic transmission error and other nonlinear factors were considered.
2296 引入由状态量、控制量与自变量时间为坐标构成的“广义状态空间”， the concept of general time-state space comprising of state variables, control var-iable and time is established.
2297 将卷筒纸印刷机折页机构齿轮系统动力学模型变为广义状态空间上的系统状态方程。 Then the model of web-offset printing machine can be transformed into a state equation of nonlinear system.
2298 在广义状态空间将方程的右端展开为时间的 Taylor级数，进一步直接积分获得非线性控制系统状态方程关于自变量时间的级数解，最终获得状态方程的解析解。 In order to solve the state equation of nonlinear control systems, at the operation point of general time-statespace, the right side of the state equation can be expanded as Taylor series about time. Then the series solution of the nonlin-ear control state equation, for which the solution is expression in time series, can be obtained by using direct-integrating ap-proach.
2299 使用Matlab 软件，对状态方程的解析解进行仿真，得到齿轮转动的角速度与角加速度与时间关系曲线。 Then we use Matlab to simulate the equation of the web-offset printing machine's gear system.
2300 得到的曲线与实际情况进行对比，验证了动力学模型与状态方程解析解的正确性。 We obtain the curves of the relationship of gear's angular velocity and time and the relationship of angular acceleration and time. we contrast these curves and the facts. the contrast result verifies the validity of the dynamic model and the analytic solution of the system e-quation.
2301 可视化技术有利于对高维多目标优化问题求解所得的解集进行评价与分析，但是现有的高维多目标可视化方法无法有效保持解集的 Pareto 支配关系、前沿密度分布及形状。 Visualization technology is conducive to the evaluation and analysis of the solution sets obtained by solvingmany-objective optimization problem, but the existing many-objective visualization technology cannot effectively preserve Pareto dominance relation, maintain frontier distribution and retain shape.
2302 针对以上问题，本文提出类圆映射可视化方法。 To solve the above problems, this paper presentsquasi-circular mapping visualization.