Monday, October 18, 2010

Chinese CN domain names dropped 110 000



CNNIC published the "25th China Internet Development Statistics Report", the vast majority of China's Internet statistics are on the rise, but there are individual items in the fall, that is, the number of Chinese domain names, especially the apparent decline in the number of CN domain names.

Report data, in 2009, the number of Chinese domain name is 16,818,401, less than in 2008, 7797, in which the number of CN domain name is 13,459,133, compared with 2008 declined 113,193, a decline of 0.83%.

Report, "2009, domain index, site index were tested in decline, international export bandwidth of steady growth index is difficult to reverse the decline in the other three indicators to a trend, leading to basic resources index fell."

Report that the basic resources are sustained, rapid and healthy development of the Internet's basic conditions, to ensure that the basis of China's Internet resources will not restrict the overall development of the Internet, need to quickly reverse the per capita amount of domain names have continued to slide ... ... domain name Resources and Web resources to maintain the steady growth.







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Monday, October 11, 2010

CorelDraw drawing the Red Lantern


1. With the Ellipse Tool to draw a lantern-shaped oval, right click the Red blocks of color, filled oval frame. (1)



2. In the case of ellipse is selected, click the Fill Tool-Fountain Fill Dialog, the dialog box to set the parameters shown in Figure (2) shows: Type options Radial, Color Blend select Two Color, From Red color choice, To choose the color Yellow .



3. This time fill, you may still not satisfied, you can choose Fill Tool Interactive Fill Tool below to adjust. This is a unique interactive CorelDRAW fill tools, you can immediately see the results, very convenient. Adjust the color patches in the oval and the arrow on the display, making it as shown. (3)



4. Tap the ellipse with the Pick Tool, press the numeric keypad on the "+" button, copy an ellipse in place (can also use Ctrl + C, Ctrl + V paste a copy in place). At this time selected is copied out of the new oval, following Shift key, drag the oval beside the point, make it thinner. (4) Repeat steps, lantern skeletons came out. (5) there is also a faint lantern light, revealed.



5. With the Rectangle Tool to draw a small rectangle, as a lantern mouth. Border options Yellow, internal padding Red. Interactive Envelope Tool used to it with the envelope. Select the window on the property clause in the Envelope Unconstrained Mode, adjust the middle of the rectangle two points, it seems that some curvature, it would be more authentic and natural number. (6) made the same way above the mouth, turning about on the lanterns. Figure (7)








[Next]



6. Now add the following number of ears in a lantern. Below the lantern with the Rectangle Tool draw a rectangle, with Shift + PageDown to move to the bottom. Will set its borders without using Interactive Fill Tool fill the internal, add some color from Yellow to yellow gray, making it look more three-dimensional. Then Shape Tool-Roughen Brush the bottom edge to make it uneven. Setting and results shown in Figure (8).



7. If you also want ears flapping up and use the Interactive Envelope Tool can be added to its envelope, shown in Figure (9).



8. Lantern above the handle worse. With the Freehand Tool to draw a figure (10) lines, and then slightly modify the Shape Tool click on it. The width of the frame set higher, the color choice Yellow.



9. All with Ctrl + A selection of objects, and then click Ctrl + G combination. Lanterns even ready. With "+" Copy 3, we can in the above quote to "Happy New Year" words. (11)



10. Select Text Tool, play the "new" and put it the right size, with the Interactive Envelope Tool-Preset List-Envelope 1 to it with circular envelope, then Interactive Transparency Tool, to words written on the lanterns look like on. (12) other words in the envelope and transparent results can Effects-Copy Effect directly from the "new" attribute copied. (13)





11. To each word and its lanterns together. They can adjust the angle to make the picture more lively and more, you can also add a dark following the end of lanterns becomes more prominent, bright. (14)



xmlscript.src = "http://guide.pconline.com.cn/comment/commentService_js.jsp?" + (new Date ()); View






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Saturday, September 25, 2010

A brief description of JSF and Facelets



JSF and Facelets

Attempt to combine JSF and JSP is like trying to make foot hard into the glove: It may do, but there is a better solution before an expedient measure. In this article, JSF enthusiastic supporter of Rick Hightower introduces his favorite on the content of Facelets: easy HTML-style templating and reusable composite components.

As the recent Java? Server Appearance (JSF) project work, I am very fortunate for the first time using Facelets. About Facelets, my favorite is that it allows me to create reusable composite components. Be able to come up with a page (for example, JSP) and turn it into components, for my JSF development is really a great advantage. My conclusion is what? If not Facelets, then JSF can not be obtained from the largest gains.

JSF and Java Server Pages technology mismatch between, JSF development is a serious problem. The question is how to integrate JSP's dynamic content JSF component-based model. JSP attaches great importance to generate dynamic content output, but JSF requires JSP to coordinate the component model. For this task goes beyond the original purpose of JSP, so had a Distance.

Most JSF developers simply learn to deliberations to address these problems, but it is like a pillow on the hammer, injuring his head will eventually fall. Facelets is a more comprehensive solution: for JSF component model tailored templating language.

Facelets has the following attractive features:

鈼?Templating (like Tiles)

鈼?Composite Components

鈼?Custom logic tags

鈼?expression language

鈼?Development of the designer-friendly page

鈼?Create component library

These features than I expected to be more relevant and uniform. In this article, I discussed the first two: templating and composite components. I use Web-based application for the suspect for my family who developed a JSF application, I put it to use Facelets view update instead of Tiles. Before reading further, should download the sample code. If you want to discuss together with the operation, also need to install Facelets.

Facelets Overview

For Facelets may do the greatest wrong assumption that it is only a substitute for Tiles. Facelets much more than that: it is the new way of thinking JSF.

JSP is the kind of template of the language generated servlet. Subject and JSP servlet's doGet () and doPost () method is equivalent to (that is, as jspService () method). JSF custom tags (such as f: view and h: form) is called JSF components to render the current state of their own. JSF component model is independent of the life cycle of the generated JSP servlet's life cycle. This independence is a source of confusion.

Different with JSP, Facelets templating language that, from the start, on account of the life cycle of JSF components. Use Facelets, generated template build the component tree, not the servlet. This allows better reuse, as components can be combined into one component.

Facelets custom tags to reduce the preparation needs to use JSF. Facelets itself can use the JSF custom components. Communication JSF and Facelets requires very little special code: to do all the work is Facelet JSF tag library components declared. In the Facelets templating language can be used directly JSF components, without any additional development.

Facelets template framework

Building design in the provision of a template for the component framework, Facelets and Tapestry (see Resources) similar. However, we have the background for JSP, Facelets seem friendly and more than Tapestry. It allows the use of the familiar style of JSTL tags and JSTL / JSF / JSP expression language style. Greatly reduce the learning curve means you can start developing more rapidly.

Facelets allows the definition can be included directly into the page, or easily added to the Facelet tag library of components. Happily actually defined in the Facelets custom tag (composite components and JSP custom tag like tag) is very fast. Set to use these components, Facelets also allows the definition of site templates (and a smaller template). This is similar to using the Tiles, but less definition files. JSF components can also be customized for internal use Facelets, because the Facelets API provides JSF components can be easily integrated with the interface.

From Tiles to JSF and Facelets

As mentioned earlier, where the sample Web application to use for my on the JSF for the skeptics to create the sample series. It is an online CD store inventory management, create, read, update, and delete (CRUD) list. It includes a form to allow users to enter a new system, CD, a radio button list, allows the user to select the music category. When the user selects a classification, it immediately triggers some javascript form submission back to server. Application also includes a CD list, the user can list the title or the artist's CD on order.

The original application received from the Tiles view, support, and now I'll build Facelets view. I will start replacing the example with Facelets Tiles support beginning, and then write complex components.







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Tuesday, September 14, 2010

CSS Syntax Guide (6) Categories property


CSS Syntax Guide

Categories property

1, display

Function: to change the display value element can be element type line, the transformation between block and list items.
Value:
none - do not show elements
block - block shows before and after the set break in the element
inline - remove the element before and after the break to make it into the other elements of the stream
list-item - the list of elements is set to line
Description: display attribute values can be generated into the list of additional titles and graphics into a line or so shows.

2, white-space

Function: Control elements of the blank.
Value:
normal - do not change, maintain the default value, the length of office in the browser page wrap.
pre - required documents show that the use of source code format.
nowarp - allow visitors inside the wrapping element.

3, list-style-type

Function: Specifies the list of the symbol or number used type of stress
Value:
none - no stress break
disc - disc stress operator (solid circles)
circle - circular stressed the symbol (hollow circle)
square - square stressed character (Solid)
decimal - a decimal number emphasize character
lower-roman - Lowercase Roman word stress break
upper-roman - Roman uppercase characters emphasize character
lower-alpha - lowercase letters emphasize character
upper-alpha - uppercase letters emphasize character
Examples:


item1
item2
item3
4, list-style-image
Function: list of standards used to replace the selected graphic symbol stressed
Value:
No graphics
url - URL address Graphics
Examples:

item1
item2
item3
5, list-style-position
Function: used to set the indentation stress break or stretch row, this attribute can be highlighted in the list to emphasize character or list of items other than alignment.
Value:
inside - indent, will emphasize the character and content of the list of projects aligned left border
outside - Shen Pai, Fu stressed that the list of outstanding items to the outside of the content of left border

6, list-style
Function: shorthand property, placed all the list of attributes in a statement.
Value:
list-style-type
list-style-position
list-style-image
These values are some of the details, see the various properties.
Examples:


item1
item2
item3





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Monday, August 2, 2010

IDS rules to establish (2)


Third, on behalf of the Chief features: header value (Header Values)

Header value is relatively simple structure, and can clearly identify abnormal header information, so characteristic of data is its chief candidate. A classic example is: set forth in clear violation of RFC793 TCP standard, set TCP SYN and FIN packets marked. This packet used by many intrusion software to firewalls, routers, and IDS systems to attack. The source of abnormal header value of the following:


Because most operating systems and application software is the assumption that RFC is strictly prepared in compliance with the case, did not add the data for the exception error handler, many of the loopholes that contains header value will Guyi use the standard definition of violation of RFC, brazenly discovered attack targets the jerry-building actions. Many of the imperfections of the software contains the error code will also have violated the value of RFC-defined header data. Not all operating systems and applications can fully support the RFC definition, at least there is a lack of coordination with the RFC. Over time, implementation of the new features of the agreement may not be included in the current RFC.


As to the above circumstances, strictly based on the RFC's IDS feature data is likely to produce incomplete or inaccurate results. This, RFC also as new and ongoing violations of the updated information, we need to regularly review or update existing data definition features.

Illegal header value is the feature data of a very basic part of legal but suspicious header values are equally important. For example, if the port 31337 or 27374 of the suspected connection, you can police say may have Trojan horse in the activities; then added a more detailed exploration of other information, we can further judge the true or false Ma Ma.

Fourth, determine the characteristics of "candidate"

To better understand how to develop value based on the special header data, following an example by analyzing the whole process in detail.

Synscan is a popular system for scanning and detection tool, because its code is used to create the beginning of the Ramen worm fragments and steal the show in early 2001. Synscan with the implementation of behavior is typical, it sends packets with a variety of distinguished features, including:


IP address information from different sources
TCP source port 21, destination port 21
Service Type 0
IP identification number 39426 (IP identification number)
SYN and FIN flag set
Different set of serial numbers (sequence numbers set)
Confirmation number of different collections (acknowledgment numbers set)
TCP window size 1028


Here we screened the data above, to see which features more suitable to do data. We are looking for is illegal, unusual or suspicious data, the majority of cases, this all reflects the loopholes exploited by attackers or they use special technology. The following are characteristics of the data candidates:


Only with the SYN and FIN flag set of data packets, which is recognized as signs of malicious behavior.
ACK flag not set, but with different values of the data packet confirmation number, but normally should be 0.
Source port and destination port are set to 21 packets, often associated with the FTP server. Port the same situation that are generally known as "reflexive" (reflexive), in addition to some particular individual, such as NetBIOS when the newsletter, under normal circumstances should not have this phenomenon. "Reflexivity" TCP port itself does not violate the standard, but in most cases they are not expected values. For example, in a normal FTP dialogue, the destination port is usually 21, but the source port is usually higher than 1023.
TCP window size to 1028, IP identification numbers of all packets for 39,426. According to IP RFC's definition, two class rooms in the data value should be different, so, if sustained, would show that the suspicious.
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Monday, July 26, 2010

Is out of date, ADSL Anecdotes


ADSL (Asymmetric Digital Subscriber Line) stands for asymmetric digital subscriber line, is called a non-symmetric, is due to the realization rate is up less than 1Mbps, down less than 7Mbps. It is a home or small business can make use of the existing telephone network with high-frequency digital compression for network service providers ISP for broadband access technology. This access method so it is a non-symmetrical manner, from ISP-ended client (downlink) requires large bandwidth to support, but from the client to the ISP side (upstream) bandwidth of only a small amount can be.

ADSL principle introduced

ADSL modem and ISDN and traditional as well as the transmission medium using the telephone network. When the two ends of a pair of telephone lines were in place an ADSL device, the use of modern frequency modulation and coding, this phone line will be able to create three information channels: a high-speed downlink channel (1.5 1.8Mbps), one is the speed duplex channel, one is the ordinary telephone channel, and these three channels can work simultaneously. That is, it can get the most out of existing telephone line data transmission capacity, so users can access a telephone line not only fast-track "Surf", you can call to send a fax, call or reduced without affecting the effect of Internet . Specific work flow is: ADSL Modem encoded by the signal transmitted through the telephone line telephone office and then by a signal recognition / separator, if it is transmitted voice signal on the telephone switch, if the digital signal to access Internet.

See Figure 1, ADSL service is composed mainly of the following:



Figure 1 ADSL diagram

* ATM Backbone (ATM backbone): is the ISP to provide broadband services to the core backbone network, is the intersection of all data. Not only provides high bandwidth, and because ATM has its own advantages, making use of the channel and data exchange more efficient.

* DSLAM (DSL ATM multiplexer): This is the central office equipment to provide ADSL services. Central Office on a similar program-controlled switches.

* Telephone lines to provide services: the current ADSL services provided through the normal analog telephone line that carries voice and data services. People were asked whether the ISDN line will be converted into ADSL line, in fact, provide ISDN is a digital transmission, and ADSL must rely on analog circuit implementation.

* Voice, data separation / integrator: This is an important part of the output in the central office DSLAM ADSL central office line and voice line when the device is integrated through a transmission line. To the client and then separated by a similar device to form a data line, a voice line.

* ADSL CPE equipment (ADSL customer premises equipment): This is a user-purchase or lease of equipment to the central office. Usually ADSL Modem or ADSL Router.

Some of the problems on the ADSL

* ADSL in the end be able to provide much speed? See from Figure 2, ADSL lines using a frequency higher than the Mandarin audio line (4400kHz), up to 1MHz. Therefore, to provide 8Mbps maximum bandwidth.



Figure 2 ADSL lines over the frequency of use of 4400Hz

* ADSL there are no weaknesses? It is susceptible to interference, high requirements for the line, with the cable length increases the quality of subsequent deterioration of data transmission.

* ADSL is not an outdated technology?

In fact, the application of each technique has its surface, just as Bluetooth technology is the same as 10 meters for communication, and wireless local area network suitable for a wider range communication. I believe that, ADSL as an ordinary telephone line can transfer the technology itself has very good flexibility, that is, each ADSL phone users are directly applicable. Also for home users and small and medium enterprises do not need a guarantee by buying bandwidth of 10M FTTB access the Internet, as 10M itself is virtual, if it is the commitment rate, then ISP, ISP to guarantee the export of the Internet bandwidth, this cost is not generally Users can affordable.






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Monday, July 5, 2010

Happiness RM Myspace Video MOV Encode

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