晶闸管串联的单相半控桥(桥中[tex=4.143x1.214]iNI0InLB3NO88zCe2wB62aKJAgWeKQaXjumW/4SA3IV1HYrUFQ8qakGQu0ohhhWn[/tex] 为晶闸管）, 电路如图所示, [tex=4.357x1.214]m/JnXqDgHCIpUcZyYBTumpuSlqs1EcBt/RMlDjbfwXw=[/tex]电阻电感负载[tex=4.357x1.214]eej/uZbCftOL1oTn8kxGo9UelpZHCX124zxkQdGYaMY=[/tex]值很大，当[tex=2.857x1.071]z7opkeLRldjTaMX1PsKn0NKYP4nY39x0UQ624967pgs=[/tex] 时求流过器件电流的有效值, 并作出 [tex=5.286x1.214]ozHSAy9jp6tFeKzJJlXfZmnQx3rfUQ0Lm1PY/yeM1DLhCyDArnUSCo8xVOSVCROrua2QnPjzOEdMc8LCP5mJOw==[/tex]的波形。

在6.4结种群相互依存模型中,按以下 4 种情况作相轨线示意图,并解释平衡点稳定的意义.(1)[tex=6.929x1.214]+uwtmAsqKMHmiU7Hn/UpK398A/3bUP5lYlbfWplCNBqpzMchADXTj74P5rw5wsMx[/tex](2)[tex=6.929x1.214]Hi7B3huo3ZLibJdrb6u1Xm/dlprEsTArZCyegkoKPBkrkHkOXcdUlPNUPQ7uIt2y[/tex].(3)[tex=10.143x1.214]eEJ/qTLhPx5Y/mSOEZ7SrEeAXCTYe9hV1aTakNpOkbqnr9q6ljQz+fMrS9Amp78jKeC9fwYn6uH0wX/U7QOg8g==[/tex](4)[tex=10.143x1.214]PiP6hra69ztNs3bnTjf2hdPXxIxV0aBfQPSkEJ0HIhNeFn2ZMdKnL8bhe4GM48kS7jAl3g9VGyD7H0S7XP4u4g==[/tex](相轨线已由图 6 给出, 可作为参考).

在7.4节种群相互依存模型中,按以下4种情况作相轨线示意图,并解释平衡点稳定的意义.(1)[tex=6.929x1.214]+uwtmAsqKMHmiU7Hn/UpK398A/3bUP5lYlbfWplCNBqpzMchADXTj74P5rw5wsMx[/tex](2) [tex=7.214x1.214]Hi7B3huo3ZLibJdrb6u1Xm/dlprEsTArZCyegkoKPBlGMxUdraggMMNVJEnGaMam[/tex](3)[tex=10.143x1.214]eEJ/qTLhPx5Y/mSOEZ7SrEeAXCTYe9hV1aTakNpOkbqnr9q6ljQz+fMrS9Amp78jKeC9fwYn6uH0wX/U7QOg8g==[/tex](4)[tex=10.143x1.214]PiP6hra69ztNs3bnTjf2hdPXxIxV0aBfQPSkEJ0HIhNeFn2ZMdKnL8bhe4GM48kS7jAl3g9VGyD7H0S7XP4u4g==[/tex](相轨线已由主教材图1给出,可作为参考).