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数变的英文
例句与用法
- Living in places that have the same weather all year long , or in areas where the weather changes several times a year
住在气候终年不变的地方，还是住在气候一年数变的地方？ - Tactical plans , such as plans for attack or defence by small formations or units , often have to be changed several times a day
战术计划，例如小兵团和小部队的攻击或防御计划，常须一日数变。 - Wind stroke is an emergency case manifested by falling down in a fit with loss of consciousness , or hemiplegia , slurred speed and deviated mouth . it is characterized by abrupt onset with pathological changes varying quickly like the wind , from which the term “ wind stroke ” comes
例18中风是以突然昏仆,不省人事,或半身不遂、语言不利、口角歪斜为主的一种疾病.因其起病急骤、变化多端,与风性善行数变的特征相似,故类比称为“中风” - Abstract : this paper developed time domain integral constraints on error response for siso feedback control systems caused by nominal plant ' s near cancellation of stable pole - zero near the j - axis . these integral constraints should be satisfied by any feedback control systems . these integral constraints give new insight into the inherent trade - offs . it will result in the settling time longer or the infinite norm of the error response larger when there are near cancellations of stable pole - zero near the j - axis . hence , when feedback control systems are designed , it is necessary to avoid the compensator ' s poles and zeros nearly cancelling the nominal ' s zeros and poles ( even if these poles and zeros are stable )
文摘:导出了单输入单输出反馈控制系统误差响应基于名义系统稳定的零、极点近似相消的时间域积分约束,此积分约束是任何反馈控制系统均应满足的.这一约束给出了单输入单输出反馈系统固有折中的新的观点.名义系统稳定的零、极点近似相消的存在导致反馈控制系统的调节时间延长或者误差响应的无穷范数变大.因此,在反馈控制系统设计中,尽量避免补偿器的零、极点与名义系统的极、零点近似相消(即使这些零、极点是稳定的) - Anthropogenic activities ( e . g . development , over - grazing , timber harvest ) can disrupt the structural integrity of oasis - desert landscapes and is expected to impede diversity communities across the landscape and make it fragmented . with human dimension and activities enhancing , the patchiness grain , edge density and landscape contrast become large , landscape diversity and patch fractal dimension decreased
随着人类活动的增强，斑块粒度、边缘密度、分散度、对比度变大，而景观多样性下降，斑块分维数变小，人类生产经营活动导致了绿洲-荒漠景观破碎化，绿洲和荒漠生态系统界面上的突变性、对比度和异质性增强。