星ooo辰的个人资料 - RAT

星ooo辰星ooo辰

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突然好想感慨一下本吧成立五年多了吧，当年一群年少无知的少年少女们，现在都过得怎么样了？又有多少新来的?有空的都来聊聊吧！

，

我要小尾巴哪位大神教教我怎么添加小尾巴

咨询贴从潍坊到宿州，托运电瓶车也可以吧，要多少钱大概？有人知道么

有木有能翻译完全的 The measurement of the ratio of the charge induced on a conductor to the change in potential with respect to a neighboring conductor which induces the charge. In a multiconductor system there are capacitances between each pair of conductors. In general, these capacitances are functions of the total geometry, that is, the location of all of the conducting and dielectric bodies. When, as is usually true, only the capacitance between two conductors is of interest, the presence of other conductors is an undesirable complication. It is then customary to distinguish between two-terminal and three-terminal capacitors and capacitance measurements. In a two-terminal capacitor, either one of the conductors of primary interest surrounds the other (in which case the capacitance between them is independent of the location of other bodies except in the vicinity of the terminals); or the somewhat indefinite contributions of the other conductors to the capacitance of interest are accepted. A three-terminal capacitor consists of two active electrodes surrounded by a third, or shield, conductor. The direct capacitance between the two active electrodes is the capacitance of interest, and, when shielded leads are used, it is independent of the location of all other conductors except the shield. Every physically realizable capacitor has associated loss in the dielectric and in the metal electrodes. At a single frequency these are indistinguishable, and the capacitor may be represented by either a parallel or series combination of pure capacitance and pure resistance. The measurement of capacitance, then, in general involves the simultaneous measurement of, or allowance for, an associated resistive element. See also Permittivity. Most capacitance measurements involve simply a comparison of the capacitor to be measured with a capacitor of known value. Methods which permit comparison of essentially equal capacitors by simple substitution of one for the other at the same point in a circuit are frequently possible and almost always preferable. Bridge comparison methods When capacitors must be compared with high accuracy, bridge methods must be adopted. See also Bridge circuit; Wheatstone bridge. Resistance-ratio bridges are Wheatstone-bridge configurations in which the potential division of the capacitor being measured and either a parallel combination of a standard loss-free capacitor Cs and a conductance Gs or a series combination of Cs and a resistor Rs is equated, when the detector is nulled, to the ratio of potentials across resistors R1 and R2. More commonly now, the reference potential division is that of a variable-ratio autotransformer known as an inductive voltage divider (IVD). See also Inductive voltage divider. The Schering bridge yields a measurement of the equivalent series-circuit representation of a capacitor. The resistance-ratio and Schering bridges are useful for two-terminal capacitance measurements. Their use may be extended to three-terminal measurements and extended in accuracy and range by the introduction of shielding and the addition of the Wagner branch. Time-constant methods If a direct voltage is suddenly applied to the series combination of a resistor and an initially discharged capacitor, the charge and the voltage on the capacitor increase exponentially toward their full magnitudes with a time constant equal in seconds to the product of the resistance in ohms and the capacitance in farads. Similarly, when a charged capacitor is discharged through a resistor, the charge and the voltage decay with the same time constant. Various methods are available for the measurement of capacitance by measurement of the time constant of charge or discharge through a known resistor. In one such method the time required for the output voltage of an operational amplifier having a capacitor as a feedback component to increase to a value equal to the step-function input voltage applied through a resistor to its input is determined by an electronic voltage-comparison circuit and timer. With the assumption of ideal characteristics for the amplifier, such as infinite gain without feedback, infinite input impedance, and zero output impedance, the measured time interval is equal to the product of the values of the known resistance and the capacitance being measured. See also Operational amplifier.

【小九的脚印】每天来一次带走一瓶酱油不定期遗忘

痒痒昂阳阳昂？？？我无语了，才发现

[德玛西亚]有人玩游戏没无聊的路过，

[格式]墨烟宫YY频道开启了 YY频道ID 45014828 @墨轻谣儿 @凤青衣_

在本吧已累计签到30天了，截图留念一下下

高调晒下！！我又得经验值了！得瑟下我的百度新首页贴吧加速升级特

墨宫现在有多少活人

【。。。】忽然发现一直很无聊自从开学就对所有事物失去了兴趣，感觉生活好无聊，比白开水还要淡就像死了一样。。。

[转] 看到一段文字，在猎国吧。。。。

此吧将被遮吧水军淹没遮吧的飘过如题

【见面会】潜了一个暑假然后多了很多新人大家都来做一下自我介绍好了

【星辰】我回来了，你们的师兄回来了

跪求一千一百章之后的传送阵手机容量不够大电脑党的同志们帮忙啊多谢了

跪求一千一百章之后的传送阵手机容量不够大电脑党的同志们帮忙啊多谢了

〔发呆〕还有人记得我么？哈哈哈我回来啦

【告别】我要走了要回家，没网，所以要潜水，一直到八月底。大家有事没事就不要@我了,回不了的。就这样

【灌水签到帖】欢迎亲们每天来水一水签个到我发的帖子已经沉的只有一个了特此再发发钱

疑惑黑魔是男是女？

没有七十六章的么？

【聊天室】大家没事来留个言

还差几点升级，谁来帮帮忙，有酱油送来的拉一瓶

发个帖刷个屏

今天度娘大抽

【签到】果断发帖赚经验有没有无聊的人来聊天，三分钟内回应

签到

【签到】大中午有人么？

？？？？？？？？？？？？？？

水贴生人勿进

在的路过一下，大家一起冲级啦

神贴还有么？最近有不少三更的

要放假啦诸位有什么活动

武尊了大家来做做吧

没事冒个泡证明我存在

超级水贴进来的留个脚印再走吧

打酱油的来了。路过的顶一下。谢谢

打酱油的来了

好久没逛贴吧了

摆脱验证码求各位道友相助

新人问傲吧谁人最牛同题求各位指点

求QQ号风大书友QQ群

新人求长经验的方法各位老大支持下指点下

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