What is DF? What is DFL

Because you have loved, you will not become an enemy; Because I have been hurt, I won't be friends; It can only be the most familiar strangers. Love has been known, drunk has been drunk. The memories of love should be well collected, but the happiness in the future should be found separately.

Love is a feeling, not love is also a feeling, and it is often difficult to decide whether the feeling in the heart is love or not. What you hold in your hands is not necessarily what you really have; What you have is not necessarily what you really inscribe in your heart. There are many times in life when you need to consciously give up, because when you have, you may be losing, and when you give up, you may be regaining.

Those who understand know how to give up, those who are true know how to sacrifice, and those who are happy know how to detach. For those who don't love themselves, what is most needed is understanding, renunciation, and blessing. Too much self-inflicted affection is begging for alms.

Loving and being loved are all things that make people happy. Don't let this turn into pain. Now that you've been through it, years later, it's a good memory to think about it once in a while.

Live more confidently, be happier, leave the most beautiful smile to the person who hurts you the most, and smart people know that they want to be happy. Cherish the people you love and the people who love you.

degree of financial leverage。Financial leverage refers to the leverage effect in which the change in earnings per share of common stock is greater than the change in EBIT due to the existence of debt.

DFL is the financial leverage factor; EPS is the change in earnings per share of common stock; EPS is earnings per common share before the change; EBIT is the change in earnings before interest and taxes; EBIT is EBIT before the change. DTL=Dol DFL= m Ebit EBIT (EBIT-I) =M (EBIT-I)=Base Period Marginal Profit Total Base Period Profit.

Calculation method: operating leverage coefficient = (sales revenue - variable costs) (sales revenue - variable costs - fixed costs).

Among them, since sales revenue - variable costs - fixed costs are EBIT (EBIT), there are: operating leverage coefficient (DOL) = (EBIT EBIT + fixed costs) EBIT = (EBIT + F) EBIT = M (M-F).

In order to reflect the degree of the role of operating leverage, estimate the size of the benefit of operating leverage, and evaluate the level of operating risk, it is necessary to measure the operating leverage coefficient. Generally speaking, the larger the operating leverage factor, the stronger the impact on the operating leverage benefit and the greater the operating risk.

DFL generally refers to the financial leverage factor. The degree of financial leverage refers to the multiple of the change rate of after-tax profit per common share to the rate of change of earnings before interest and taxes, also known as the degree of financial leverage, which is usually used to reflect the size and effect of financial leverage, as well as to evaluate the size of the financial risk of the enterprise.

DFL indicates the multiple of EPS changes when the EBIT changes by 1 times. It is used to measure the financing risk, the larger the DFL value, the greater the financing risk, the greater the financial risk, and the larger the EBIT value, the smaller the DFL value under the premise of the same capital structure.

Financial leverage factor application conditions.

The financial leverage factor can be used for after-tax profit and earnings per common share of a company, but it is mainly used to determine the degree of financial risk of a company.

It is generally believed that the greater the financial leverage factor, the greater the impact of after-tax profit on EBIT changes, and the greater the degree of financial risk. Conversely, the smaller the financial leverage factor, the smaller the degree of financial risk. This statement is not comprehensive, fails to specify the application conditions of the financial leverage factor, and is easy to lead to misunderstanding, and cannot achieve the purpose of effectively preventing the financial risks of enterprises.

For the above content, please refer to Encyclopedia - Financial Leverage Factor.

The financial leverage coefficient refers to the multiple of the change rate of after-tax profit per share of common stock to the rate of change of EBIT, also known as the degree of financial leverage, which is usually used to reflect the size and effect of financial leverage, as well as to evaluate the size of the financial risk of the enterprise.

The financial leverage factor is calculated as follows: financial leverage factor, change in earnings per common share, change in earnings before interest and taxes.

Significance of Financial Leverage Factor:

1. DFL indicates the multiple of EPS change when the EBIT changes by 1 times. The larger the value of DFL, the greater the financing risk and the greater the financial risk.

2. Under the premise that the capital structure remains unchanged, the larger the EBIT value, the smaller the DFL value.

3. Under the condition that the total capital and EBIT are the same, the higher the debt ratio, the greater the financial risk.

4. The debt ratio can be controlled, and enterprises can offset the adverse effects of increased risk by reasonably arranging the capital structure and moderate debt.

dft（Discrete Fourier transform) is generally referred to as a discrete Fourier transform.

The Discrete Fourier Transform (DFT) Fourier Transform (DFT) Fourier analysis method is the most basic method of signal analysis, and the Fourier transform is the core of Fourier analysis, through which the signal is transformed from the time domain to the frequency domain, and then the spectral structure and change law of the Huai answer signal are studied.

Physical significanceLet x(n) be a finitely long sequence of lead filial piety n, then its Fourier transform and z transform.

and the discrete Fourier transform are expressed by the following three relations:

x(e^jω)=n=x(n) e^j-ωn。

x(z)= n=x(n)z^-n。

x(k)= n=x(n) e^-j2πkn/n。

The z-transform on the unit circle is the Fourier transform of the sequence.

The discrete Fourier transform is the equally spaced sampling of the spectrum x(ej) of x(n) at n points on [0,2], that is, the discretization of the sequence spectrum, which is the physical meaning of DFT.

df：don't fragment，IP protocol.

The first "flag" occupies 3 places, and only the first two are meaningful.

DF isThe assembly of words trembles and quibblespseudo-action commands in, which is used to define the number of bytes occupied by the operand, each operand defined by the pseudo-operation occupies 6 bytes, and each subsequent operand hole occupies almost 48 bits, which can be used to store double-precision floating-point numbers.

The lowest bit of the flag field is mf (more fragment), and mf =1 means "there are still fragments" after it. mf 0 represents the last shard. The middle digit in the flag field is df (don't fragment) sharding is only allowed if df = 0.

For example: message df'hello'At this point, the string.

hello" takes up 6 bytes per character.

Note: This pseudo-operation can only be used on the 386 and its successors.

DFA is the abbreviation of Design for Assembly.

Assembly-oriented design refers to the design of the product.

The stage design product makes the product have good assemblyability, and the research object of assembly-oriented design air elimination is each assembly process of the product, and through the optimization of product design, each assembly process of the product has the characteristics of the best assembly process.

Requirements:

Design for Assembly (DFA) should be considered at all stages of the design process, especially in the early stages of design, when the design team needs to carefully consider how easy it is to assemble a product or component when considering multiple options.

The design team needs a DFA tool to effectively analyze the ease of assembly of a product or component, a design tool that provides results quickly, is simple and easy to operate, and ensures the consistency and completeness of the assemblyability assessment of the product.

It should also eliminate subjective judgment in assembly design, allow for free association, make it easy to compare different designs, ensure a scientific evaluation of the final solution, determine the scope of the assembly problem, and be able to provide multiple alternatives to simplify the product structure, thereby reducing the cost of manufacturing and assembly.

The above content reference: Encyclopedia-DFA

DF stands for the meaning of dont fragment, this word is the computer of the Internet term, it is easy to see in the computer industry, and this word is very important.

Nowadays, there are many abbreviations, in fact, there are good and bad abbreviations, and the good aspect of laughing is that it can save time and remember it faster. The downside is that it can cause a lot of trouble for people who are just starting to know the term. However, most of them are still in favor of using abbreviations, and now many words are relatively long, and there are initials to replace them, so you can easily and quickly type this word.

In the computer industry, there are many letters that need to be memorized and understood.

DF is the meaning of freedom, which is the abbreviation of English degree of freedom. It is the number of variables whose values are not limited when calculating a statistic.

The formula is: df=n-k. where n is the number of samples, and k is the number of conditions or variables that are restricted, or the number of other independent statistics used to calculate a statistic. Used in sampling distributions.

Definition: Statistically, degrees of freedom refers to the number of independent or freely variable data in a sample when the parameters of a population are estimated by the statistics of the sample, which is called the degrees of freedom of the statistic. In general, degrees of freedom are equal to the number of derivatives of an independent variable minus its derivatives.

For example, the number of variations is defined as sample minus average (a derived amount determined by the sample), so that for n random samples, the degrees of freedom are n-1. Li Huiji.

Mathematically, degrees of freedom are the dimensional number of a random vector, i.e., the minimum number of unit vectors required for a Bi as a vector to be fully described. For example, the displacement from a computer screen to a kitchen can be measured in 3D vectors.

, so the degrees of freedom of this displacement vector are 3. Degrees of freedom are also often related to which of these vectors is the sum of squares of the coordinates, as well as the parameters in the chi-square distribution.