1.改变帝号。晋 干宝 《搜神记》卷六：“或禄去公室，赏罚不由君，私门成羣，不救；当易世变号。” 2.改变旗号。《宋史·郭延濬传》：“ 延濬 易旗变号，贼不知觉，斩关掩入，斩千馀级。”
变号 [biàn hào]
misc. sign reversal
网络释义专业释义
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sign-changing - 引用次数：28
Then the problem (2.2.1) has at least two anti-symmetric sign-changing solutions in C~30,1.
则问题(2．2．1)至少存在两个反对称变号解。
参考来源 - 非线性三阶微分方程边值问题的变号解
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讨论了带变号扰动并且具有一定附加条件的临界椭圆方程的两个正解存在性。
This paper deals with the existence of two positive solutions for critical elliptic equations with a changed sign perturbation and with an auxiliary condition.
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提出一种基于伴随系统和变号系统的求解电力系统经典模型稳定边界上不稳定平衡点的方法。
A new method based on adjoint system and minus system to compute unstable equilibrium points on the stability boundary of power system classical model is proposed.
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主要研究一类三阶两点边值问题变号解的存在性和多重性，利用不动点指数和拓扑度理论等得到了新的结论。
We show existence results for multiple sign-changing solution for third-order two- point boundary value problems by using the fixed point index and the topologic degree theory.
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I'm using the fact that when you take a cosine and change the angle inside the cosine, it doesn't care. whereas, if you go to the sine and change the angle inside the sine, it becomes minus sine.
我用了一个结论,当你使用余弦函数时,改变角度的正负,函数值不变,而对于正弦函数,改变角度的符号,则函数值也会变号
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Or I'm canceling the 5 everywhere and changing the sign here I get t^-2t-3=0.
或者我在等号两边除以5,并变号得到t^-2t-3=0
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