峰值<img src='https://img2.soutiyun.com/ask/uploadfile/5970001-5973000/8d4852392c221c60445bf45e0af0a2ed.png' />吸收是随着积分<img src='https://img2.soutiyun.com/ask/uploadfile/5970001-5973000/d5f3b52d38cafebcaa4674016bc2e89a.png' />吸收的增大而增大的,同时还随着下列哪个因素的增大而减小?( )
相似题目
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如下图所示,<img src='https://img2.soutiyun.com/ask/2020-01-07/94725988610853.png' />应为( )。<img src='https://img2.soutiyun.com/ask/2020-01-07/947259894250194.png' />
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已知某厂2000-2009年工业产值指数呈现为一个周期波动,如表4-2所示。<img src='https://img2.soutiyun.com/shangxueba/ask/2940001-2943000/2940030/ct_cjtjmswj_cjtjmswnchoose_0402(0912).jpg' />根据上述资料计算循环波动测定指标:该厂2000~2009年工业产值指数波动的峰值为()。
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已知两个线性变换<img src='https://img2.soutiyun.com/ask/2020-07-24/964447450539867.png' />,求从<img src='https://img2.soutiyun.com/ask/2020-07-24/964447482729708.png' />到<img src='https://img2.soutiyun.com/ask/2020-07-24/964447490132131.png' />的线性变换。
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若<img src='https://img2.soutiyun.com/latex/latex.action' />,<img src='https://img2.soutiyun.com/latex/latex.action' />,则下列式子成立的是( )
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直线<img src='https://img2.soutiyun.com/ask/2020-02-18/950884563792837.png' />与直线<img src='https://img2.soutiyun.com/ask/2020-02-18/950884577991765.png' />的关系是( )
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已知z=lnu,<img src='https://img2.soutiyun.com/latex/latex.action' />,则<img src='https://img2.soutiyun.com/latex/latex.action' />( )
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图中阴影部分为晶闸管的通态电流波形i1,电流波形的峰值为Im1。计算电流波形的平均值Id1与有效值I1。<img src='https://img2.soutiyun.com//1/2021-06-07/991924069846758.png' />
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图中阴影部分为晶闸管的通态电流波形i3,电流波形的峰值为Im3。计算电流波形的平均值Id3与有效值I3。<img src='https://img2.soutiyun.com//1/2021-06-07/991923977221993.png' />
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设<img src='https://img2.soutiyun.com/latex/latex.action' />则<img src='https://img2.soutiyun.com/latex/latex.action' />=( ).
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男性,40岁,发现左侧颈部小包块,CT、MRI检查如图所示,请选择最可能的诊断()<img src='https://img2.soutiyun.com/shangxueba/ask/18300001-18303000/18301269/2016072818164956119.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/18300001-18303000/18301269/2016072818165646074.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/18300001-18303000/18301269/2016072818170225050.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/18300001-18303000/18301269/20160728181708767.jpg' />
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病历摘要:脑膜瘤患者女,55岁,视力下降数月。查体:视力下降,余神经体征阴性。<img src='https://img2.soutiyun.com/shangxueba/ask/21054001-21057000/21056152/2016080411361155670.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/21054001-21057000/21056152/2016080411363213140.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/21054001-21057000/21056152/2016080411363770796.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/21054001-21057000/21056152/2016080411364194722.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/21054001-21057000/21056152/2016080411364682394.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/21054001-21057000/21056152/2016080411365145350.jpg' />
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女,3岁,右耳出生至今耳聋,结合图像,最可能的诊断是()<img src='https://img2.soutiyun.com/shangxueba/ask/18597001-18600000/18599943/2015111217172541240.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/18597001-18600000/18599943/2015111217172661526.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/18597001-18600000/18599943/2015111217172726731.jpg' />
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将函数f(x)=x<sup>2</sup>在<img src='https://img2.soutiyun.com/shangxueba/ask/18735001-18738000/18737342/2016071617062459326.jpg' />上展开成余弦级数,其形式为<img src='https://img2.soutiyun.com/shangxueba/ask/18735001-18738000/18737342/2016071617063532608.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/18735001-18738000/18737342/2016071617065141640.jpg' />()<img src='https://img2.soutiyun.com/shangxueba/ask/18735001-18738000/18737342/2016071617071375522.jpg' />
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某一水泵的流量为<img src='https://img2.soutiyun.com/shangxueba/ask/18726001-18729000/18727196/20150618111622761.jpg' />,漏损流量为<img src='https://img2.soutiyun.com/shangxueba/ask/18726001-18729000/18727196/2015061811163167874.jpg' />,叶轮内的流量为<img src='https://img2.soutiyun.com/shangxueba/ask/18726001-18729000/18727196/2015061811163945969.jpg' />,则其容积效率<img src='https://img2.soutiyun.com/shangxueba/ask/18726001-18729000/18727196/2015061811164812800.jpg' />为()。
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如果把图示电路中的变压器视为理想器件,<img src='https://img2.soutiyun.com/shangxueba/ask/18774001-18777000/18774272/2016071815505494842.jpg' />时,()。<img src='https://img2.soutiyun.com/shangxueba/ask/18774001-18777000/18774272/201607181551011369.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/18774001-18777000/18774272/2016071815510514617.jpg' />
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利用上颌双侧<img src='https://img2.soutiyun.com/shangxueba/ask/17559001-17562000/17561302/2015093009262249313.jpg' />垫矫正反<img src='https://img2.soutiyun.com/shangxueba/ask/17559001-17562000/17561302/2015093009262249313.jpg' />,反<img src='https://img2.soutiyun.com/shangxueba/ask/17559001-17562000/17561302/2015093009262249313.jpg' />解除后<img src='https://img2.soutiyun.com/shangxueba/ask/17559001-17562000/17561302/2015093009262249313.jpg' />垫每次应磨去多少()
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一台4极中型异步电动机,P<sub>N</sub>=200kW,U<sub>N</sub>=380V,定子0联接,定子额定电流I<sub>N</sub>=385A,频率50Hz,定子铜耗<img src='https://img2.soutiyun.com/ask/2021-01-03/978560273352189.png' />=5.12kW.转子铜耗<img src='https://img2.soutiyun.com/ask/2021-01-03/978560286697952.png' />=2.85kW,铁耗<img src='https://img2.soutiyun.com/ask/2021-01-03/978560298531629.png' />=3.8kW,机械损耗<img src='https://img2.soutiyun.com/ask/2021-01-03/97856031340548.png' />=0.98kW,附加损耗<img src='https://img2.soutiyun.com/ask/2021-01-03/978560322980028.png' />=3kW,<img src='https://img2.soutiyun.com/ask/2021-01-03/978560339469971.png' />.正常运行时<img src='https://img2.soutiyun.com/ask/2021-01-03/978560353474772.png' />,起动时<img src='https://img2.soutiyun.com/ask/2021-01-03/978560375203015.png' />,由于磁路饱和与趋肤效应的影响,<img src='https://img2.soutiyun.com/ask/2021-01-03/978560441999835.png' /><img src='https://img2.soutiyun.com/ask/2021-01-03/97856039470213.png' />.试求:
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设<img src='https://img2.soutiyun.com/shangxueba/ask/51291001-51294000/51293683/975264374908477.png' />是n维实向量,且<img src='https://img2.soutiyun.com/shangxueba/ask/51291001-51294000/51293683/975264387229182.png' />战性无关,<img src='https://img2.soutiyun.com/shangxueba/ask/51291001-51294000/51293683/975264401121976.png' /><img src='https://img2.soutiyun.com/shangxueba/ask/51291001-51294000/51293683/975264415373792.png' />是线性方程组
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点(1,2,1)到平面<img src='https://img2.soutiyun.com/shangxueba/ask/19032001-19035000/19032905/2015110115113928560.png' />+2<img src='https://img2.soutiyun.com/shangxueba/ask/19032001-19035000/19032905/2015110115114815657.png' />+2<img src='https://img2.soutiyun.com/shangxueba/ask/19032001-19035000/19032905/2015110115115812967.png' />-10=0的距离为()。
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有限长序列<img src='https://img2.soutiyun.com/shangxueba/ask/18120001-18123000/18120993/2016031714031255938.jpg' />=()。<img src='https://img2.soutiyun.com/shangxueba/ask/18120001-18123000/18120993/2016031714041772379.jpg' />
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可以直接利用模型上余留牙确定<img src='https://img2.soutiyun.com/shangxueba/ask/17538001-17541000/17540854/2015082211124147883.jpg' />关系的是()。需要用<img src='https://img2.soutiyun.com/shangxueba/ask/17538001-17541000/17540854/2015082211124147883.jpg' />堤确定正中<img src='https://img2.soutiyun.com/shangxueba/ask/17538001-17541000/17540854/2015082211124147883.jpg' />位关系及垂直距离的是()。需要用<img src='https://img2.soutiyun.com/shangxueba/ask/17538001-17541000/17540854/2015082211124147883.jpg' />堤确定正中<img src='https://img2.soutiyun.com/shangxueba/ask/17538001-17541000/17540854/2015082211124147883.jpg' />位关系和中线的是()。需要用蜡<img src='https://img2.soutiyun.com/shangxueba/ask/17538001-17541000/17540854/2015082211124147883.jpg' />记录确定颌位记录的是()。
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女,19岁,发现左颈部无痛性肿块2年余,可活动,CT如图所示,最可能诊断为()<img src='https://img2.soutiyun.com/shangxueba/ask/18291001-18294000/18291851/2016072817403713681.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/18291001-18294000/18291851/2016072817404619041.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/18291001-18294000/18291851/2016072817405389051.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/18291001-18294000/18291851/2016072817410029572.jpg' />
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若<img src='https://img2.soutiyun.com/latex/latex.action' />,<img src='https://img2.soutiyun.com/latex/latex.action' />试证明时域卷积定理<img src='https://img2.soutiyun.com/latex/latex.action' />和频域卷积定理<img src='https://img2.soutiyun.com/latex/latex.action' />
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男,4个月,相貌怪异,结合图像,最可能的诊断()<img src='https://img2.soutiyun.com/shangxueba/ask/17796001-17799000/17798971/201511231032013640.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/17796001-17799000/17798971/2015112310320224881.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/17796001-17799000/17798971/201511231032042853.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/17796001-17799000/17798971/2015112310320644602.jpg' />
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