零阶保持器（zero-order holder）

相似题目

• 图中放大部分所示的“SIGNATURE OF HOLDER”是指什么（）https://assets.asklib.com/images/image2/2017080114222730846.jpg

  A . 证件签署人签名 B . 持证人签名 C . 签发地 D . 签发机关

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• 有关零阶保持器，下列说法错误的是（）。

  A . 是低通滤波器 B . 使采样信号变成阶梯信号 C . 只可用无源网络实现 D . 不允许通过高频成分

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• Possession of a bill of lading enables the holder（）obtain delivery of the goods at the port of destination.

  A . to B . by C . on D . i

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• Indirect cooling of fuel injector nozzle holders for diesel engines is accomplished primarily by （）.

  A . heat conduction into the injected fuel oil B . heat conduction into the water jacket wall C . water circulation through passages in the holder D . fuel oil circulation through passages in the holder

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• 零阶保持器

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• 一个复杂的高阶系统总是可以看成是由若干个零阶、一阶和二阶系统并联而成的。

  A . 正确 B . 错误

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• 一个高阶系统的传感器总可以看成是由若干个零阶系统、（）和（）系统组合而成的。

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• 数字控制器设计的零阶保持器法，也称阶跃响应不变法，其设计准则是什么？

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• 一个复杂的高阶系统总是可以看成是由若干个零阶、一阶和二阶系统串联而成的。

  A . 正确 B . 错误

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• 零阶连结器的频率特征可以近似当作是（）滤波器。

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• 若提单上“收货人”一栏记载“DELIVER TO HOLDER”，则提单正常转让时第一手背书人应是（ ）。

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• 计算机控制系统中,A/D、D/A转换器可以分别用理想采样开关和零阶保持器描述。( )

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• 、下列有关零阶渠道说法正确的是（ ）

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• Now the cards are becoming ______.（在发展中国家也变得越来越普遍了). And card-holders in Ch

  Now the cards are becoming ______.(在发展中国家也变得越来越普遍了). And card-holders in China, Brazil and other emerging markets could teach their more affluent counterparts a thing or two about managing debt.

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• 贝塞尔（Bessel)函数是一类重要的微分方程的解,它在天体物理和热量分布问题中有重要应用,零阶

  贝塞尔(Bessel)函数是一类重要的微分方程的解,它在天体物理和热量分布问题中有重要应用,零阶贝塞尔函数定义为下列幂级数的和函数: <img src='https://img2.soutiyun.com/ask/2020-11-03/97324199768035.png' /> (1)试求出J0(x)的定义域; (2)利用Mathematica在同一屏幕上作出上式右端幂级数的前5项部分和的图形,再作出J₀(x)的图形(利用内部函数)，并从图形上比较函数的遏近情况.

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• A certificate of deposit （CD) is issued by a depository- institution（56) that the holder h

  A certificate of deposit (CD) is issued by a depository- institution (56) that the holder has deposited at the institution a certain mount of money for a certain period of time. By issuing a certificate of deposit, a bank, or (57) institution, gives its pledge to (58) the certificate at maturity and to pay a certain rate of interest for the use of the deposited funds. Certificates of deposit are issued in several different forms. They may be negotiable or nonnegotiable, If a CD is negotiable it may be sold on the secondary market (59) to maturity. Usually only large CDs are issued in negotiable form. CDs may also be issued either in bearer or registered form. Negotiable CDs are usually always issued in bearer form. because of the ease with which ownership may be (60) . (41) A．evidence B．fact C．proof D．prove

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• 听力原文：The holder of credit card can buy goods against the card at any shop that has joined the scheme without cash.

  (9) A．The credit card can be used at any shop without paying cash. B．The credit card can he used at any appointed shop together with cash. C．The credit card can be used at any appointed shop without paying cash. D．The credit card can be used to withdraw any amount of cash.

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• The Queen formally appoints all government office holders except the Prime Minister.（）

  是 否

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• 零阶保持器的数学表达式为，试求其传递函数和频率特性。

  零阶保持器的数学表达式为<img src='https://img2.soutiyun.com/ask/2020-07-14/963573840285162.png' />，试求其传递函数和频率特性。

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• 3、晶体的什么物理性质分别需要用零阶、一阶、二阶、三阶、四阶张量表示（）

  A．温度、电位移、应力、压电系数、电致伸缩系数 B．熵、应力、电场强度、压电系数、弹性柔顺系数 C．温度、内能、介电常数、电致伸缩系数、线性电光系数 D．熵、电场强度、应变、压电系数、线性电光系数

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• 10、连续系统离散化方法除零阶保持器外，还有哪种？

  A．Tustin变换 B．一阶保持器 C．单变量系统零极点不变 D．脉冲响应不变准则

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• A call option gives the holder:

  A、The right to sell at a specific price. B、The right to buy at a specific price. C、An obligation to sell at a certain price.

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• 2、2.ANSYS优化方法有零阶方法和一阶方法，其中零阶方法为直接法，适合于精确的优化分析。

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