16x DVD burner to write in the end how fast?

Although DVD burning faster and faster, but I heard "in the future the actual write speed is not as fast as the specifications said," Why is this? In addition, it also increased the speed limit?

Decided to use DVD recorder is one of the factors that speed. Because of the greater speed, write data, the shorter the time required.

For the DVD, the 1 second to write 1350KB of data "and speed", that is, 2x speed drive writes data to 2700KB / s, 4 speed is 5400KB / sec.

DVD burner, etc. from the original speed to 4x, and marked shortening of the time is proportional to the speed of, for example, under such speed write 4.7GB of data about 60 minutes, 30 minutes 2x, 4x 15 minutes. But if speed is more than 8 can not let it go, supposedly 8x 4.7GB of data should be written under 7.5 minutes, but in fact it takes about 10 minutes, and will appear 16X takes about 6 minutes.

鈼?Write the relationship between speed and time (to write about 4.7GB of data)

Marked in the product specifications in the figures is the write speed of the "maximum" speed. The actual current DVD-R write speeds up to 8x, DVD + R up to 12X, over these 8x burner, the speed is not to burn all the discs, but in some areas with the greatest speed recording.

鈻?16-speed is limited to the most peripheral

This is because, in the CD drive and DVD recorders, by rotating the disc to burn and read data on the device, the disc rotation frequency is in the physical limit. Determined by the physical properties, if the rotation frequency of more than 10,000 turn Mei minutes, the disc will be abnormal, there may be crushed. For this reason, the disc drive to control the rotation frequency.

As the 4-speed disc rotation frequency of the following fail Mei minutes 10 000 switch, so the whole disc can be written with the greatest speed. However, to achieve 8-speed, disc structure, due to actions, and within weeks, some more than 10 000 turn per minute, so within a week to write Department of speed control speed in the 4 to 6 daily, each minute part of less than 10,000 rpm District 8-speed write.

Since this is not due to 8x write the entire disc, and therefore can not be labeled according to specifications in the pro rata rate of shortening of the time. If the speed is 16 words, can actually write the region with the highest speed is smaller than 8x.

鈼?16 time speed 鈮?1 / 16

鈻?disc rotation in order to control the number of sub-10 000 turn in Mei within the need to separately adjust the position of the disc write speed. Only the outer ring of 16-speed write:

In addition, in the end to how much the convenience to enjoy high-speed, but also on the capacity to write data, because DVD discs are generally write from the inside out. In other words, more than 8x speed burner, just write the data capacity is small, you can arrive before the end of the most high-speed write. To enjoy high-speed 8x or more to bring the convenience, only to write nearly 4.7GB of high-capacity data. In addition, the DVD is concerned, the most outer ring under 16X speed close to 10 000 per minute change, already facing limit.






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UTM Revolution - Who can not have both fish and bear's paw?

As the market and technology developments, many users find that their purchases of UTM products very much like a Swiss army knife - only useful when using a single function. All modules use fully, UTM devices will greatly decrease the performance, availability poor. Certain brands of UTM products, nominal performance is only open when the single function of the test data. Once the full-function, performance may decline more than half. Therefore, the manufacturers engineers in the implementation of the recommendations in good faith when users first open only to a certain function, other functions later to gradually open the frequent scene. At the same time, users are also not worried about performance not to use the full functionality to open, resulting in name only as a function UTM security products to buy, but only as a single functional product.

This occurs because, for the first generation appeared in the market, UTM products, integrated firewall, VPN, anti-virus, intrusion prevention, protection and other functions or terminals in the equipment to do is really just a simple superposition Once when opening multi-functional, various functional modules of the computing resources to snatch the overall performance directly led to a sharp decline. Although many companies have taken such as improving the hardware configuration, even with some features of ASIC hardware acceleration means, but the effect is not significant.

On the other hand, UTM market, the user after years of baptism, the requirements for UTM has become increasingly rational. At present, many mature users, vendors no longer accept all the performance parameters. But according to their network needs, set up a test environment, then use the standard test instrument to measure various products. The most common case is, ignoring the vendor product nominal number of connections, such as data throughput, but the test products in the environment at least Firewall + Intrusion Detection + anti-virus pages open at a time when handling HTTP, FTP throughput, etc. data as a selection basis. This test, more in line with the user's practical situation, coupled with Avalanche, IXIA test equipment and other standards to bring the relative fair, and the results more reliable.

Facing the new market environment, Lenovo network imperial continuous improvement in technology, in order to seek introduction of performance to meet user demand for a new generation of UTM products to use. Particularly with the integration of technology + engine + PSE pre-Optimal Matching technology to solve next-generation UTM product very good comprehensive performance problems.

Fusion engine, that is within UTM products, no longer exists independent of the firewall, intrusion prevention, anti-virus detection engine, but is a complete integrated test engine replaced by UTM. In fact, firewall, intrusion protection, virus protection and other major gateway protection technology, is a big overlap. By integration of the engine rather than multi-engine work independently or in series, can effectively reduce the wasteful duplication of testing brought the performance. Inevitably bring about the integration of the engine characteristics of database integration, and the resulting performance in fact is considerable. Of course, firms can adopt a prerequisite for fusion engine is vendor for firewall, intrusion prevention, anti-virus, VPN, and other additional features have sufficient technical inputs and accumulation of feature library can be purchased, but the engine must self-development, or have Source-level partners. Only on this basis, the chance of achieving complete integration of the engine.

Integration of the engine using the premise, UTM products can also be pre-screening technologies and optimization through the PSE matching techniques for further performance leap.

Integration engine technology principle as shown above. Data into the device, in addition to abnormal traffic flow protocol anomaly detection module outside. Traffic are the main engine to pre-PSE. PSE engine to a very high pre-separation of the innocent and suspicious traffic flow, and then by the characteristics of suspicious traffic matching engine optimization for further processing.

PSE a kind of pre-existing characteristics of technologies for data abstraction library to form a volume much smaller than the original features of the PSE database, then use the PSE library of pre-screening to speed up network processing technology. PSE through the abstract use of pre-treatment technology PSE Library, the detection time required for 10% less than conventional. When suspicious network traffic only to the 20% (which in practice is already high), pre-treatment with PSE performance can be as high as 70%.

Upon completion of the pre-PSE, the suspicious flow characteristics and then further optimized to match the engine for processing. This optimization principle of matching the technology is constantly under the processed data packets state set, when the state bits are placed in a predetermined value, then trigger the appropriate treatment.

Can be compared in the past the police vehicle on the highway to check every car on the release of a complete investigation. The culprits will be guns scattered the parts and bring in a number of vehicles. When the police see a particular component, can not be certain, do not immediately detained vehicles to avoid traffic congestion, but only made a record in mind. Until the check to the back of a car's parts, with the mind than the records and found that these components can be combined into a gun in the best car to be detained. Although the front has been spared some of the parts, but due to parts missing, the ultimate combination of guns can not cause damage.

Lenovo net Royal integration engine + PSE using technology and optimizing the pre-matching techniques of a new generation of UTM products can already do intrusion prevention + firewall + anti-virus functionality is fully open and contrast the performance of individual performance, down 10% to 20 % of the level of the user's network can be useful in the process, the real turn on all of the features to provide users with comprehensive protection really.







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Spring scene photos using Photoshop will be processed into autumn scenery

How to green and spring scenery pictures into a golden autumn scenery it? Internet a popular approach is to use the channel mixer.

For example, this Huangshan scenic photos below, we can handle it this way: Open the image in Photoshop, and then click in the Layers Panel at the bottom of the "Create a fill or adjustment layer" button, select "Channel Mixer" Add an adjustment layer.



Figure 1



Figure 2

And then make the appropriate settings in the pop-up dialog box, you can get seemingly Autumn photos. Of course, the fact that Vista could not exist - even in the fall, pine needles generally do not yellow as this.



Figure 3



Figure 4

I realized that another method of introducing foreign. Here for your information.



Figure 5

Open the photo to be processed, the image layer mode changed to Lab (Image> Mode> Lab color), copy the current layer (Ctrl + J). Select the new layer, use the "application of image" tool (Image> apply image) application the following properties:



Figure 6

Add a layer mask layer to the current layer (Layer> Layer Mask> show all). In the layer mask selected cases, use the "application of image" tool application the following properties:



Figure 7

Finally the "Auto Levels" to the layer mask (Shift + Ctrl + L). The final results:



Figure 8







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