eddy current

eddy current的基本解释

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[计] 涡流

与eddy current相关的网络例句 [注：此内容来源于网络，仅供参考]

One of these testing methods, eddy current, has been widely used for metal thickness measuring because of its good sensitivity, high test speed , non-contact and other advantage. The principle of eddy current testing is that, when the test coil is close to the metal conductor with alternating current, the eddy current would be inducing in the conductor, and correspongdingly, the eddy current would affect the original magnetic field, the result is the coils impedance and inducing voltage changed.

其中涡流无损检测技术具有灵敏度高、检测速度快、非接触等特点而广泛应用于金属厚度检测，它的原理是当载有交变电流的检测线圈靠近金属导体时在导体中产生涡流，该涡流又影响原磁场，使得线圈的阻抗和感应电压发生变化，通过分析阻抗或感应电压的变化来获得被测导体的信息。

In this thesis the process of constructing the non-perturbative Hamiltonian theory is de-scribed and is applied to estimate the vacuum condensate. It contains the following contents:At the very beginning, by using the path integral method and eliminating the gluon freedom, aGCM action 〓 of current quarks including lower order current-current coupling was derivedfrom the QCD Lagrangian and the effective Hamiltonian operator that could hardly be doneby the normal methods was derived. After doing this, the broken vacuum is introduced whichincludes quark-antiquark condensate through the generalized Bogoliubov-Valatin transformation,the effective Hamiltonian of constituent quark was derived. The detailed formulas containingthe spatial current-current coupling term for the effective Hamiltonian and gap equations wasworked out by parameterizing the correlation kernel as a quadratic potential. And then, the gapequation was solved and the quark-antiquark condensate of vacuum was studied both in the casesof instantaneous interaction and retarded interaction. In the end, the effective Hamiltionian withtwo-body quark-quark interaction was derived with one-body approximation, and with the helpof the functional integral method the coupling non-linear dynamic equations for systems withnuclear matter was derived. Finally, these equations were solved by selfconsistent method andthe effect of nuclear matter on vacuum condensate was studied. The spatial current-current coupling term is too difficult to handle, hence the correlationkernel is assumed to be not important and usually omitted in the pure vacuum condensate, andthe instantaneous interaction generally is adopted. Retaining the spatial current-current termand partial retardation effect, the quark pairs condensate in pure vacuum was studied, and theeffect of quark mass was also studied. At present, little study is focused in the case with nuclearmatter and spatial current-current term also omitted. Under the approximation with partialspatial current-current term, the effect of nuclear matter on vacuum condensate was studied.

本论文描述了量子色动力学整体色对称模型哈密顿量方法的构建过程，得到了反映正反夸克对凝聚真空结构的关于组分夸克的有效哈密顿量算符，它隐含了胶子作用，并且准确至流-流耦合项；接着，通过参数化哈密顿量中的夸克作用关联核，导出平方禁闭势参数化选择的哈密顿量的具体公式和能隙方程；随后，应用公式，编程求解，考察了瞬时作用下和部分延迟作用下真空的正反夸克对凝聚，在计算中保留了空间流-流耦合作用；之后，导出瞬时势和延迟势下包含二体作用项的哈密顿量公式，并采用单体化近似，通过泛函变分方法得到核物质存在时耦合的非线性动力学方程；在保留部分空间双流耦合作用的近似下，求解核物质的动力学方程，考察核物质密度对真空凝聚的影响，以往考察真空凝聚，对关联核的选用，由于空间流-流耦合项不易处理，也认为作用不大，常忽略该项，并且常采用瞬时作用；本文保留空间双流项和部分延迟作用，考察了真空情形的夸克对凝聚，还考察了夸克质量对纯真空凝聚的影响，以往对核物质存在情形的真空凝聚考察很少，也都忽略空间流-流项，本文在考虑部分空间流-流项近似下，考察了核物质存在对真空凝聚的影响。

Imitate of the eddy that take off body (Detached-Eddy Simulation, DES) is the mean square of Reynolds of a kind of union that appears in recent years law and imitate of big eddy numerical value are both the onflow imitate method of the advantage.

梗概： 脱体涡模拟(Detached-Eddy Simulation，DES)是近年来出现的一种结合雷诺平均方法和大涡数值模拟两者优点的湍流模拟方法。

与eddy current相关的网络解释 [注：此内容来源于网络，仅供参考]

eddy current：涡流

涡流 涡流(eddy current) 涡流产生原因: 当线圈中的电流随时间变化时,由于电磁感应,附近的另一个线圈中会产生感应电流. 实际上这个线圈附近的任何导体中都会产生感应电流. 如果用图表示这样的感应电流,看起来就象水中的旋涡,

eddy current：涡电流

这磁场能在金属物体内部感生 (induces) 涡电流 (eddy current). 涡电流又产生磁场,倒过来影响原来的磁场,引发探测器发出鸣声. 金属探测器不仅能探测军火,还可以探测到硬币、锁匙及其它金属物品. 金属探测器利用有交流电通过的线圈,

eddy current：涡流电流

其原料为非合金铁粉,或者是含有磷,矽添加剂的铁粉.在交变场装置里使用整体压制的粉末磁导体颇为困难,因为磁滞及涡流电流(eddy current)的损耗很大.因此,针对在交变场里使用的粉末制品的制作,

eddy current：涡电流 (台) 涡流

Dielectrie Breakdown Voltage 介质崩溃电压 (台) 介质击穿电压 | Eddy Current 涡电流 (台) 涡流 | Edge -Board Connector 板边 (金手指)承接器 (台) 板边连接器

eddy current loss：涡流损耗

涡流损耗(eddy current loss) 导体在非均匀磁场中移动或处在随时间变化的磁场中时,因涡流而导致的能量损耗. 涡流是上述情况下导体内的感生的电流. 这种电流在导体中形成一圈圈闭合的电流线,称为涡流(又称傅科电流).