PV, UV, PR

1. PV

PV (page view) is the page views or clicks. each user's access to the website is recorded once. User visits to the same page are accumulated

2. PV

In the mechanical seal manufacturing industry, the PV value is used to indicate the working capacity of the mechanical seal (it can also be used to indicate the working load of the Mechanical Seal ). P-Sealing Fluid pressure (MPa); V-Sealing end face average slip speed (m/s ). PV value in the unit of MPa · m/s
. The higher the PV value of the mechanical seal, the stronger the working ability of the mechanical seal. The higher the PV value under working conditions, the higher the load to carry the mechanical seal (the fluid pressure and the rotating speed of the sealing cavity ).

3. What is UV?

UV (unique vistor) refers to the number of people who visit a site or click different IP addresses of a news article.

Within the same day, UV records only visitors with independent IP addresses who enter the website for the first time, and does not count when they access the website again within the same day. Independent IP visitors provide statistical indicators for different audiences within a certain period of time, but do not reflect the comprehensive activities of the website.

4. What is a prvalue?

PR value, that is, PageRank, web page-level technology. From Google's founder Larry Page, it is part of Google's ranking algorithm (ranking formula), used to identify the level/importance of web pages. The level ranges from 1 to 10, and the Level 10 is the full score. The higher the PR value, the more popular (more important) The web page is ).

For example, a website with a PR value of 1 indicates that the website is not very popular, while a PR value of 7 to 10 indicates that the website is very popular (or extremely important ).

We can say this: the more external links a website has, the higher its PR value. The higher the level of external link sites (if Macromedia's website is linked to your website ), the website's PR value is higher. For example, if there is a link to the website, the website must provide some good website content for the website, as a result, Google will use the link from Li Si as its vote for James's website.

You can download and install Google toolbar to check your website level (prvalue ).

Conclusion: for online editing, whether your browser contains Alexa or Google is an important criterion for judging whether online editing understands the promotion. If you don't have one, start from today and install it now!

5. PV is the abbreviation of promotion video, a common title of music video in Japan. The two are exactly the same thing. It is also called music clip or video clip. Japanese Wiki? Music Video is an image of a music that is made when a popular music is published. Because it is for the purpose of promoting CD, so in Japan, it is generally called zookeeper marketing promotion? Dynamic Route serving (promotion
Video), which is called poromo or PV. Music Video, music clip, or video clip is generally called overseas .~~~~ In fact, in the animation, It is a trailer that will be produced before the animation is played.

Factors Affecting PV

The following are some factors that affect PV:

1. Online News Editing Methods

After a news item is published, its PV data can be tracked, usually every 5 minutes. Different Channels of websites of different brands have a general criterion for the PV performance of news published by them. After the news is published, the PV value is generally increased. The PV changes per unit time can be calculated based on the PV performance in different time periods. Experienced network editing, after several 5 minutes of data accumulation, we can roughly predict the peak PV level of the news. If this level is not satisfactory, the editor should take some measures, such as "optimization" title, or add other eye-catching elements and slices. In general, through such "processing", the PV performance of a piece of news can be improved to reach a new peak.

That is to say, the editing method of online news affects the PV value.

What other factors affect PV? There are at least these factors:

News release time

In different time periods, the number of people accessing the site varies, and the number of people accessing the site varies. Therefore, the main contribution of PV value fluctuations is the natural fluctuation of the number of people accessing the site during different time periods. For the same piece of news, PV performance will be different in different time periods.

The population characteristics (gender, age, education level, and reading intention) of people who access the Internet in different periods are different. Therefore, they are also 10 thousand online users, even for 10 thousand accesses to a website, the distribution of these 10 thousand accesses on different channels/content varies with time periods. So sometimes PV changes are related to the changes caused by this factor.

2. Access cycle

For some websites that are frequently browsed, we may visit the website several times in a day. There is a certain interval between them. This interval is often related to people's actual work pace. For example, when many people go to work, they will take time to browse the news. The second time they come back to see the news, they will usually take a break in the middle of the morning or even after lunch. Therefore, even if other factors remain unchanged, people may also have an impact on news or website PVS due to the periodicity of website visits. Of course, because different people have different return visit cycles and different time periods, this influence factor may not lead to significant fluctuations, but may be dispersed in the PV performance of different time periods, however, it is certain that any PV data also plays a role in the return visit period.

3. Emergency Factors

For example, some emergencies may lead to an increase in access to a website, but the original intention of these visits is only news related to emergencies. However, news consumption is often unpredictable, so it is common that people will take a look at other things after reading the news they want to watch. This factor may also contribute to the PV of a news article (unrelated to emergencies.

4. Accidental Factors

Finally, there are some occasional factors (in fact, this is also the cause of hitchhiking ). What is included? Such as weather factors, such as waiting during SARS. What else? Think about it :-)

From this point of view, a simple PV data is actually the result of the combined contribution of multiple factors, so sometimes PV fluctuations can not be completely guided and influenced by editing means. Knowing this is important. This tells us that it is unreasonable to blindly analyze PV to determine the success or failure.

In social science research, the contribution of different factors to a specific phenomenon is called a detailed analysis model. A lot of things that we don't seem to change. In fact, the internal composition ratio has changed a lot. The relative relationship between seemingly changing things does not actually change. It is just a kind of quantitative fluctuation.

The website says that the average daily IP Address/PV traffic is about 600/2400, which means that the number of visits to the home page today is 2400, and the number of visits to the IP address is 600. That is to say, these 600 IP addresses access the Home Page 2400 times in total.

Traffic is the amount of fluid passing through a certain cross-sectional area per unit time. This volume is expressed by the volume of the fluid as the instantaneous volume flow (QV), referred to as the volume flow, and expressed by the quality of the flow as the instantaneous mass flow (QM.

The measurement of the flow of the fluid flowing in a certain channel is collectively referred to as the flow measurement. The fluid used for flow measurement is diversified, such as gas, liquid, and mixed fluid. The temperature, pressure, and flow of the fluid are significantly different, the required measurement accuracy is also different. Therefore, the task of traffic measurement is to study various measurement methods based on the measurement conditions such as the type, flow status, and measurement location of the tested fluid, and ensure that the traffic value is transmitted correctly.

Generally, website traffic (Traffic) refers to the traffic volume of a website. It is used to describe the number of users accessing a website and the number of webpages browsed by users, common statistical indicators include the number of independent users of the website, the total number of users (including repeated visitors), the number of web pages browsed, the number of pages browsed by each user, and the average residence time of users on the website.

Operating System PV Principle

The PV principle is used to solve synchronization and mutual exclusion between operating system processes.

Synchronization: A group of processes in the one-fill environment send messages due to mutual constraints and cooperate with each other to wait for each other, so that each process can be executed at a certain speed.

Mutual Exclusion: A group of processes share a public resource and must ensure that only one process is using critical resources at the same time.

For example:

Mutual exclusion means that many people have a zhuqiao and only one person can use this bridge.

Synchronization means that two people go through a bridge at the same time, one ride, one walk. but two people must arrive at the same time. the two men set out at the same time, and the cyclists were fast. They had to wait for a while to walk. ensure that they are mutually constrained to arrive.

Semaphores:

Indicates the number of available resources of concurrent processes. If the value is smaller than zero, it indicates the number of processes waiting for resources.

P operation:

Reduce the semaphores by one. If the semaphores (SEM) are negative, the process that calls the P operation stops until another process performs the V Operation on the same semaphores.

V Operation:

When semaphores are added and semaphores (SEM) are greater than or equal to 0, a process is awakened in the SEM-related queue for execution.

Principle of PV

1: The PV operation of mutex semaphores appears in a process where the Sn is mutex, so P (SN)

V (SN) is in the customer Process

2: The PV operation of the synchronized semaphore occurs alternately between two processes, for example, S1 and S2 directly alternate with customers and operators.

3: In my opinion, the PV operation difficulty is the operation between synchronization processes. Here, the operation of the synchronization process on the same semaphore must be P first, followed by V. the P operation is to use resources, the V operation is to release resources, and the process must first use resources and then release resources.

This is like riding and walking people. At first they had to go, but they waited for each other while walking. That is why P was the first operation, because p operations use resources, they need to go, so use resources.

4: After the P operation causes the semaphore to be smaller than zero, stop the current process and wait for another process to wake him up, that is, add one to the semaphore.

5: After a V operation is completed, it is generally considered that the process is executed next time and the next P operation is executed. Here it refers to the P (S2) operation and then stops, wait for the Cashier's v operation to wake him up.

Category

Website access statistical analysis is based on the basic data of website traffic. According to the articles of the new online marketing observations, website traffic statistical indicators can be roughly divided into three categories, each containing several quantity of statistical indicators.

Website traffic indicators website traffic statistical indicators are often used to evaluate the website effect. The main indicators include:

· Number of independent visitors (unique visitors)

· Repeat visitors)

· Page views)

· Page views per user)

· Statistical indicators of specific files/pages, such as page display times and file downloads.

User behavior indicators mainly reflect how users come to the website, how long they stay on the website, and what pages they visit. The main statistical indicators include:

· Users' stay time on the website

· User source website (also called "guiding website ");

· Users' search engines and keywords

· User visits during different periods.

Browser name and version of the browser. The following statistical indicators are available:

· User's Internet access device type

· The name and version of your browser;

· Visitor computer Resolution Display Mode

· Name and version of the operating system used by the user

· Regional distribution of users.