Witryna11 kwi 2024 · Noun []. impedance (countable and uncountable, plural impedances) . The act of impeding; that which impedes; a hindrance.. 2012, R. Crafton Gibbs, Spirit Growth: Logos 2, Vol. 2, of Writing God's Book of Life (page 31) Faithful yielding is therefore a display of love before God by preparing to respond to his Call to Arms, even though … Witryna26 lis 2008 · Impedance Mismatch）”矛盾的办法是在对象层和关系层间建立一个映射层（Mapping Layer），通过这种方式数据源中的关系数据才能进入对象领域，以对象的面貌出现，供上层应用使用。 ADO.NET实体框架提高了数据编程的抽象级别，帮助消除数据模型和语言间的阻抗失谐。 XEMEXEME 码龄17年 暂无认证 20 原创 46万+ 周排名 …
Impedance Matching Fundamentals - Cadence Design Systems
Witryna19 kwi 2024 · 面向对象编程与关系型数据库间的不一致 (Object-relational impedance mismatch) 几乎所有的现代编程语言支持面向对象（OO），当我们用代码建立对象模型时，我们通常使用原始类型（整数，字符串等），数组和对象的组合。 虽然每一种语言处理细节的方式不同，嵌套对象结构的想法已经成为我们用来描述“东西”的通用语言。 … WitrynaThe Impedance Mismatch. When a group of speakers’ total impedance is either higher or lower than the amplifier’s impedance range, an impedance mismatch occurs. … fnd and stroke
The 50 Ω Question: Impedance Matching in RF Design
In electronics, impedance matching is the practice of designing or adjusting the input impedance or output impedance of an electrical device for a desired value. Often, the desired value is selected to maximize power transfer or minimize signal reflection. For example, impedance matching typically is used … Zobacz więcej Impedance is the opposition by a system to the flow of energy from a source. For constant signals, this impedance can also be constant. For varying signals, it usually changes with frequency. The energy involved can be Zobacz więcej Adjusting the source impedance or the load impedance, in general, is called "impedance matching". There are three ways to improve an impedance mismatch, all of which are called "impedance matching": • Devices … Zobacz więcej Telephone systems Telephone systems also use matched impedances to minimise echo on long-distance lines. This is related to transmission-line theory. Matching also enables the telephone hybrid coil (2- to 4-wire … Zobacz więcej Whenever a source of power with a fixed output impedance such as an electric signal source, a radio transmitter or a mechanical sound (e.g., a loudspeaker) operates into a load, the maximum possible power is delivered to the load when the impedance of the load ( Zobacz więcej Power factor correction devices are intended to cancel the reactive and nonlinear characteristics of a load at the end of a power line. This causes the load seen by the … Zobacz więcej In RF connections, impedance matching is desirable, because otherwise reflections may be created at the end of the mismatched transmission line. The reflection may … Zobacz więcej Acoustics Similar to electrical transmission lines, an impedance matching problem exists when transferring sound energy from one medium to another. If the acoustic impedance of the two media are very different most … Zobacz więcej Witryna23 sty 2024 · In relational databases, an impedance mismatch occurs when a relational database needs to be transformed into an object-oriented model. That is also not … Witryna13 cze 2024 · An impedance mismatch can occur when accessing a relational database in an object-oriented programming language. Problems can arise because object … fnd and adhd