什么是IQ Option以及它如何工作?


What is Non-Inventory Item?

Non-Inventory Item – is a type of product that is purchased or sold but whose quantity is not tracked. This type of items are purchased for company use or custom product purchased for Projects.

Non-Inventory Items appear 什么是IQ Option以及它如何工作? in sales process (on Sales Quotes, Sales Orders, Sales Invoices, or customer Credit Notes). If you select “Is purchased from supplier” check box on the, non-inventory items appear in the supplier process (on Purchase Orders, Purchase Invoices, or supplier Credit Notes).

Use Non-Inventory Items to track merchandise that:

  • You sell but do not purchase.
  • You purchase but do not resell.
  • You purchase and resell but do not track as inventory.

What’s the difference between Inventory and Non-Inventory Items?

Inventory Items are items that you buy and then stock for a while before selling. Kpi.com Accounts tracks the quantity on hand, the current stock value (transaction value), and the FIFO method to calculate stock valuation. It also tracks some accounting information like “cost of goods sold” for inventory items that you have sold.

Non-inventory items are items that you purchase (usually on behalf of a specific customer) and then immediately sell or install, or items that you sell without ever buying. For non-inventory items, kpi.com Accounts will only track how much you have spent or taken in. Some people use non-inventory items even for items that they stock because they prefer a simpler approach—even though it gives them less information


On-premises is the software and technology that is located within the physical confines of an enterprise often in the company’s data center as opposed to running remotely on hosted servers or in the cloud.

By installing and running software on hardware located within the premises of the 什么是IQ Option以及它如何工作? company, internet technology (IT) staff has physical access to the data and can directly control the configuration, management and security of the computing infrastructure and data.

On-Premises vs. SaaS and Cloud Solutions

Also referred to as “on-prem” or on-premise, on-premises software is the more traditional method for working with enterprise software, and typically requires a software license for each server and/or end user that will be working with the software.

On the other end of the spectrum are hosted services for managing 什么是IQ Option以及它如何工作? data and public cloud solutions, where third parties are responsible for managing and securing the infrastructure that houses the 什么是IQ Option以及它如何工作? data stored on their servers.

These software-as-a-service (SaaS) and cloud computing alternatives to on-premises software are frequently considered for their potential cost savings that result from reduced expenses related to staffing, power consumption, maintenance and security.

Hybrid Solutions

A third option that has become more popular in recent years are hybrid solutions like Microsoft s Azure Stack that enable enterprises to run some workloads and applications on-premises while utilizing the cloud for other workloads.

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2. For the Retail Data Analysis Exercise (dataset distributed in the last class) , generate a report which consists of tables and graphs. Think about insights that you can generate from this data. For 什么是IQ Option以及它如何工作? example, which product categories are seeing a consistent decline in sales. Your submission should contain your R code and a power point presentation. The presentation should be formal, in that, it should look like something that you would present to your CXO team or important clients. Your report should also contain insights about the following.


VirtuousLiu 于 2019-04-20 21:59:14 发布 14831 收藏 227

















因为加入了前馈电容,所以与反馈电阻形成新的零点和极点,虽然Cff在其零点频率之后引入了增益提升,但是环路相位变化(提升)在零点频率和极点频率之间达到最大值; 请参见以下等式1和等式2的计算。



零点和极点的位置如Figure 4所示。(在上面)


增加了前馈电容设计, 变换器可以更有效地响应输出电压上的高频干扰(交流阻抗小)。
图2和图4中的 bode 图显示, 每个反馈网络在较低频率下的响应是相同的。在中到高频率下, 随着通过 C1(CFF) 的阻抗路径的减小, 输出电压到反馈端的扰动(变化)衰减较小, 并有效地提供增益和相位的提升。

在DCDC工作电源中, 增加的增益和相位与会使得转换器对负载瞬态响应速度更快, 什么是IQ Option以及它如何工作? 因为在反馈节点检测到的电压偏差在较高频率下衰减较少。转换器的反应是调整占空比, 以更快地纠正输出电压偏差。

为了优化瞬态响应, 选择合适的Cff 值, 这样环路反馈的增益和相位提升将增加转换器的带宽, 同时仍保持可接受的相位裕度。

通常, Cff 的较大值可提供更大的带宽改进。但是, 如果 Cff 过大, 前馈电容会导致环路增益交叉频率过高, 并且 Cff 相位提升贡献不足, 导致不可接受的相位裕度或不稳定性。









参考:TI-Optimizing Transient Response of Internally Compensated dc-dc Converters With Feedforward Capacitor