The fifth is the maintenance issues in WLAN applications,The management document makes network operation and maintenance easier, notebook battery management documentation in addition to must include a detailed status list of wireless access points and site, but also the test report included in the document, Dell fk890 battery to include both basic network safety, performance analysis also archive each real-time reporting order, so that the formation of the entire network of long-term dynamic network analysis document, provides a convenient way to further upgrade and maintenance of the network.

Continuous development of wireless LAN technology, 802.11a, 802.11g two standard launch and commercial development of the wireless network has brought new business opportunities with several major operators China Mobile, China Telecom, China Netcom has invested to build the WLAN Broadband access hotspots, WLAN has become synonymous with mobile commerce and mobile Internet, the major institutions of higher learning are vying to build the WLAN, to meet the needs of students, faculty and staff growing Internet, the large enterprise laptop battery WLAN network construction as the next step direction of development, the demand for multi-frequency test support distributed testing also referred to the agenda.

Distributed test can simultaneously support 802.11a/b/g multi-frequency test program has become the preferred solution for WLAN test.Here leads to a certification problem, how to authenticate a device the the normal equipment within the network Dell gd761 battery or illegal invasion of equipment, whether illegal intruders is to use what means intrusive, factors that are unsafe for the network, and how to find and quickly positioning device of the illegal invasion is also very important WLAN security testing needs.Thirdly, areas not suitable cabling or wiring can not, WLAN solve the problem of the land network applications.

1) streamlining the instruction set PIC instruction set is specifically designed according to the minicomputer characteristics, and strive each instruction to achieve higher efficiency, reduce duplication Asus a32-m50 battery of command functions. High medium and low gate PIC microcontroller instruction number 58, 35 and 33. This brings two benefits, on the one hand, can greatly improve the utilization of the code, and help to improve execution speed. The other hand, to the user learning, memory, and application bring great benefits, programming and debugging is relatively easier and reduce the coding required for the same function, saving development time.

2) Harvard (Harvard) bus architecture, Harvard architecture the independent addressing program memory and data memory, laptop battery, that is, they are located in different physical space. PIC microcontroller series not only uses a Harvard architecture, and uses a Harvard bus architecture, to give full play to the potential advantages of the Harvard architecture. Greatly enhance the efficiency of the system and data reliability.

3) single-byte instruction single byte instruction SCM system is a revolutionary change. High-middle and low PIC microcontroller instruction median of 16, 14, 12. Relatively independent of the addressing of the ROM and RAM, all the instructions to achieve a single byte of, not only the data access is more secure, and its operating speed has been significantly improved.

4) two pipelined instruction architecture uses a Harvard bus architecture, notebook batteries in the device's internal data bus and instruction bus separation and different bus width. When an instruction is executed, the next instruction at the same time is removed, so that in each clock cycle, a higher efficiency can be obtained.

5) the register group structure the PIC register, including I / O ports, timers, and program counter, adopted RAM structure, and requires only a single instruction cycle can be completed to access and manipulate.

6) one-time programmable (OTP) OTP products listed zero wait (Zero time to market), Asus a32-n61 battery and can be customized to meet specific needs. Product customization can significantly increase the product life cycle, and enhance the competitiveness of products in the market.

 One hand, rub network behavior damage the interests of others, not just to let the other party to pay for their own network and electricity, also hurt (physical and moral), in terms of the users prefer to use the wireless network, Laptop battery or preferably some basic security settings to reduce the probability of rub network:

1, the wireless router has a WEP, WPA, the WPA2 encryption functions (security: WEP <WPA <WPA2), proposed set can turn on the highest level of encryption and set a password should not be less than 6 with uppercase and lowercase letters, digital, you can greatly increase the difficulty is (setting method, Please reference in Ze Peng article: prevent the rub network).

A complex name for SSID, do not use the default name of the TP-LINK, disable SSID broadcast, you can reduce the possibility of search, masters or professional software or through packet capture, brute force, Deauth attack and other techniques to obtain the SSID.

3, limited IP address, set the MAC address filtering prevent unauthorized client access to the wireless network by legitimate computer MAC address list settings in the wireless router or AP, and of course, this set is not absolutely effective, but reduce the probability of rub network,Acer laptop battery master, or can be used to load the driver, Ethereal way to capture the true MAC address, then forged MAC address can still achieve their goals.

4, as may be able to try to reduce the transmit power of the wireless router or AP course, common equipment are almost always unable to adjust the power level, but you can adjust the device's position or antenna obstructions to achieve the radiated power in remote. Just another check, typical sensitivity rub card 11b:-92dBm + /-1dbm _AT_ 11Mbps, 11g:-76dBm when clocked at + /-1dbm _AT_ 54Mbps only seems to adjust the position farther rub network effect, if rub network almost no effect in the vicinity.

5, often view the wireless router log to view the list of computers communicating rub network if it is found, immediately renamed, change your password, kicked off network.

6, occasionally intentionally turn off their computer network connection and data transmission indicator pay attention to these devices is abnormal. <

(6) If you crash, then enter "safe mode", open the Start / Run dialog box, enter sfc and press the Enter key to start the "System File Checker, start detection system, HP laptop battery as identified error, the screen will prompt specific damage to the name and path of the file, and then insert the system CD, select "Restore Files" command, loss or missing files will be restored.

(7) If the system still crashes, then re-install the operating system.

The BIOS battery discharge (recovery BIOS factory default) is recommended to plug the graphics card, memory, clean up health and polished graphics, memory Goldfinger.

Unable to start the operating system of various diagnostic methods are as follows.

First check the boot, the computer has begun to start the operating system. If you start the operating system crash, blue screen or automatically restart normal hard disk partition table and master boot record, excluding the hard disk partition table is damaged, the hard disk master boot record corruption, the end of the hard disk partition flag loss cause of the malfunction. Next, use the following method for diagnosis.

Step 1: First, use safe mode to start the computer, see if you can start, if you can not start, it may be infected with the virus, the system files are missing, operating system corruption, hard drive has bad sectors, hardware device conflict or a hardware problem, go to Step 4; if they can start safe mode, it may be caused by hardware drivers and the system is not compatible with the operating system in question or infected.

Step 2: Then run anti-virus software, if there is a virus, it may be caused by a virus, antivirus and restart the computer, if not normal, you need to reinstall your operating system.

Step 3: If a virus is detected, you can use the operating system that comes with the System Restore feature to restore the system restore if the system is normal, the fault is corrupted by the system. If the problem persists, IBM laptop battery it may be caused by a device driver is not compatible with the system; then delete the sound card, video card, network card device driver, and then install the drivers one by one, each installation of a device to restart a computer, to check which device driver is causing the failure, check out the new version of the driver download faulty equipment, and then install it.

18, to improve optical drive error correction capability.

Drive operating speed popular market is growing fast, but the running speed of the optical drive is closely linked with its error correction capability, if the drive's read and write speed, then it will be reduced by the error correction capability, so we can say that the, improve drive running speed sacrifice the cost of error correction capability. Therefore, if one-sided pursuit of read and write speeds, high-speed CD-ROM will be Panasonic laptop battery the quality of a disc quite high, almost a little disc quality, optical drive might recognize out. Conversely, some low-speed CD-ROM drive was able to read the contents of the poor quality of the disc, VCD released low-speed CD-ROM drive is better than high-speed CD-ROM drive. Of course, for the high-speed CD-ROM drive, we can set to change the error correction capability of high-speed CD-ROM drive, as long as the option in the Control Panel / System Performance "/" file system "/" CD-ROM " CD-ROM set for double speed, but this approach will greatly reduce the operating speed of the CD-ROM drive.

13, multi-use virtual drive

There are many games are the CD-ROM version of the software, be sure to use the CD-ROM drive to the proper use. But we often use the CD-ROM drive to play the game, then the drive will often in frequently to read and write data, status, and long-term past, CD-ROM drive is bound to be subject to wear and tear, which greatly shorten the service life of the CD-ROM drive. In fact, we can use the virtual drive software to establish their own hard disk image file, so that you can make the CD-ROM drive to take rest a. If our hard disk capacity is very large, can take advantage of the virtual drive software virtual CD, VCD and CD-ROM games to the hard disk, virtual CD-ROM not only faster than the real CD-ROM drive much faster can also extend the life Sony laptop battery of the CD-ROM drive, why not do it . Now relatively well used virtual drive software Virtual Driver2000.

14, using the CD-ROM drive care software to protect the CD-ROM drive

In order to improve the service life of the CD-ROM drive, the right to care is essential. There are many users usually do not pay attention to the proper use of drive, such as a direct hand close the doors of the high-speed rotation of the disc out of the warehouse, shut down or restart the computer, do not remove the disc, these bad habits directly affect the use of the CD-ROM drive life. To this end, we usually can use some dedicated drive care software to protect the CD-ROM drive, for example, we can use the CD-ROM Nursing 2001 "to protect the CD-ROM drive, the software manual Jincang can be avoided, to drive a warehouse injury, in the pop-up positions The door will automatically delay to ensure that the disc to completely stop the rotation, but also has a CD player, stop function.

 1, the work can not move the CD-ROM

CD-ROM drive is a high-precision equipment, laser head floating height of the surface of the disc when the work of a few microns. When the CD-ROM is a read-write state, HP laptop battery the event of a large shock, may be caused by the impact of the laser head and the disc, causing damage. So do not move in the CD-ROM drive in the run. In the CD-ROM drive installed, the demolition process should be more careful, drive mobile transport non-bump protection, it is best to use a foam or sponge packaging, to minimize vibration.

2, the CD-ROM drive operation action to light

Very thin optical drive tray bracket institutions, access to the disc in the tray to be careful not to slam down the pressure plate, nor can foreign body collision pop-up bracket, otherwise the bracket will be deformed or broken. Must retract the bracket to the optical drive internal by key or command from the control circuit automatically bracket recover without applying hand force to push the bracket back into the drive to prevent bracket mechanical damage and internal transfer to a plate institutions Electric failure.

3, set the cache to improve the optical drive to read and write speed

Speed ??this indicator will be marked on each drive enclosure , but the speed is usually said drive may reach a maximum speed under ideal conditions, and in the actual use of the process, the CD-ROM drive to read and write speed may also be vulnerable to computer itself running speed constraints. To this end, IBM laptop battery we only reasonable set computer, to try to make the drive to achieve the desired value. In fact, here we can set the cache to improve the running speed of the optical drive. Usually drive cache when manufacturers in the production of the "hard" in the internal drive to establish cache. Through the optical drive optimization software as well as speed up software, but we can try to increase the optical drive's Cache to improve the efficiency of data transmission. In addition, we also items of equipment in the control panel to open the drive's DMA drive the speed will accelerate. If you drive with the manufacturers produce specialized driver, it is best to your CD-ROM drive installed.

Memory is one of the important parts of the computer, laptop battery memory itself quality or installation problems, then your computer's overall performance will be affected, computer or even various failures, such as not boot, boot black boot alarm. In fact, due to memory problems caused in addition to the failure of the memory itself, basically some small problem for everyone today summed up a common several memory performance of maintenance failures and their causes, and I hope it will help.

First, memory corruption, leading to the boot memory alarm:

This failure should be frequently encountered, and most are still alive and well on the night before the next morning, a boot, not hear the usual "beep" is heard, but "tick, tick, tick ..." ring non-stop, the display image display.

Most of the time of this failure is because the use of the computer environment is not good, the humidity is too large, the process of long-term use, the memory of the finger surface oxidation, resulting in increased contact resistance of memory Goldfinger memory slots, hinder current through thus memory self-test error. The performance of a boot on "Didi" ringing off the hook, that is, we often say "memory alarm.　

The approach of this problem is very simple, is to remove the memory, the memory on both sides of the Goldfinger carefully cleaned using rubber, plug it back to the memory slots. To note here is the direct contact with Goldfinger in Goldfinger scrub, try not to hand, because hands sweat will be attached to cheat on again after a period of time to cause the finger oxidation, repeat the same fault.

Second, the memory can not short-circuit led to a host power:

This situation may be quite a few friends have not encountered before, often this failure memory corruption would be more serious, but the surface of the memory chips, Goldfinger, RC is not necessarily obvious signs of burning, sometimes exactly the same, and good memory. But the memory will be inserted into the motherboard , the motherboard can not power up. When the power supply into the power plug, the power switch is pressed, the host no CPU fan and power supply fan is not working, the power indicator does not turn on, and no power is exactly the same.

The arrival of notebook security, Lenovo Zhaoyang "refers to" conquer the world

Recently, Lenovo announced the launch of the laptop mainly playing cards and a "safe" products, sparked the attention of many people in the market.

This model is Zhaoyang E660 laptop full support for fingerprint recognition technology, fingerprint identification to replace the traditional password encryption also have frozen protection mechanisms, can instantly lock system, fully protected, while the retail price is significantly low other similar products in the market. It can be said that a great safety notebook topple from the high-end trend.

Zhaoyang E660, once launched, attracted a lot of eyeballs. After all, the mainstream price will be able to enjoy the security and convenience of fingerprint recognition brought such a good thing for many users almost can not imagine. It can be said that the emergence of Zhaoyang E660 order the notebook market in 2005, the highest CTR word "security" is rapidly becoming. But also worried that this is a show, not a laptop security years, really come to this?

Security good, high prices

The advantage of the fingerprint identification in improving the security of the system is very obvious. Because each person's fingerprint is unique, which rules out the possibility of the use of others the same fingerprint to get rid of the fingerprint password. Moreover, in general, each person's fingerprint is relatively fixed, laptop battery and will not change with the changes in the degree of growth or health of the person's age. In addition, if you want to increase reliability, simply register more fingerprint to identify more fingers, up to as many as ten, each fingerprint is unique, so you can easily use multiple fingerprint multiple password , improve system security.

Fingerprint recognition technology to strengthen the security of mobile computing that, in fact, has been the emergence of related products on the market. In addition to the fingerprint recognition technology, some manufacturers also through a variety of means to try to improve laptop data security. Such as Hewlett-Packard and Dell had a history of its high-end product is equipped with a hard disk data protection technique can protect important data to the local hard notebook computer lock on the computer at the same time when the computer is limited.

A skit head, began Xianbai up, "Listen, power management program, see the battery status color is red, if the color green yellow are considered normal. Obvious breakpoint in the discharge process, say become suddenly from 80% to 30% or becomes 0 at the same time in accordance with the standards of IBM, the battery is a consumable item, regardless of how many charge cycles as long as the use, the actual full battery capacity smaller than the design capacity is normal and not covered under warranty column. "

The simple-minded, and quickly come to a halt: "You stop and ask two fools problems: one, the green taskbar display inside the battery icon not how to do?, How to check the battery charge cycles? Best to put it simply, do not show off your expertise, it is best to let me click of the mouse will understand. "

Skit head quickly reply to him, "Your first question Well, simple, as long as you run the Battery MaxiMiser Wizard to the third step, select the display in the taskbar the Battery MaxiMiser Wizard, you do understand your second Well, how to check the battery charge cycles? then... you have to install the drive, such as Battery MaxiMiser ThinkPad Configuration software, then open the Control Panel Control Panel, then the Thinkpad the Configuration, then ower Management is final Battery Information Status Detail and cycle count, understand? "

"I do not understand you this is too complicated a little!" Simple-minded protest. "Do not you just not say this, to solve practical problems. Notebook how old I was recently bought squeak sound normal? And the battery is not?"

The skit head replied: "That they should not make a fuss, because almost all notebooks are so high frequency noise is the the motherboard switching power supply and the graphics card. Fact Yeah, all laptop will have a certain amount of noise, mainly two aspects: 1. hard run has a snapping sound, then head in the read data, especially the Hitachi drive is more obvious. 2 fan noise. these things, but it does not matter, oh and battery. "

Simple-minded, something to say: the number of notebook battery break things and more

Seem to understand the simple-minded, "So I think the old battery caused the problem seems laptop battery Trivial, but sometimes indeed wronged it."

The skit head smile, "Oh, yes, I, like you, a lot of things on blaming battery old For example, since I have a laptop after shortly computer virus inside came into being interference from time to time and destroy my normal work, many viruses can automatically restart my computer. these things, and battery you? past me, but the old charge, now think of it, also blush. addition,  laptop battery If memory problems, the system will not start and the battery does not matter right? my colleagues recently appeared in the books of the memory compatibility issues, solve it only yesterday a buddy, upgrade memory to find their own battery shortened life expectancy and increase the heat of the machine, mainly the new memory in the fever of work actions, usually two memory machine than a memory machine some of the heat, and memory work is needed to power consumption power consumption increase is also normal. "

Kuo, President of City University of Hong Kong: Mainland basic computer education is useless

Mainland China Computer Education is perhaps useless. "Kuo, hands folded, fingers twisted tight, giving a long sigh, told reporters," China should not only become the Institute, but rather to Intel, Microsoft to access and learn. "

September 8, who have both the American Academy of Engineering, the title of foreign academician of the Chinese Academy of Engineering, is the president of the City University of Hong Kong International Electrical and Electronics Engineers Lifetime Achievement Award winner, sigh with computer education in the Chinese Mainland.

A review of education in the United States, China, Hong Kong, Looking forward to the Mainland, Kuo, said, "Learning should adhere to the principle of education, the Chinese saying" Learning "Mainland students only the achievements attaches great importance to, I do not know How to find a road belonging to mainland students.

"Learning", Kuo, consider themselves to adhere to the two decades of theory and educational philosophy. November 2008, Way Kuo said in a speech at the inauguration of the City University of Hong Kong, about sixty years ago, the United States, a prominent educator Hutchins said: freedom is to explore, discuss, teach in the University. Without which Yan memory. Six decades the world situation changes, recently CityU's educational mission is to "respond to the needs of society, and to provide professional education and research.

Computer News: university in the United States has done for many years professor, is also a professor at City University of Hong mainland education is said to no stranger, you see how computer education in Mainland China?

Guo bit: whether it is in the United States, Hong Kong, I have respected a concept, it is the old Chinese saying "Learning". It is not too deep understanding of view, Mainland computer education in addition to the emphasis on achievements and has been completely outdated language programming, left me with the impression that is "not very practical" a serious point to say, it is useless.

Why? Mainland enterprises friends often tell me, Mainland students of the Department of Computer Science, Let's talk about the C + + language theory and technology to a set but there is much difference, but the actual work requirements, and even less innovation. Some company CEOs privately told me, do not like computer science graduate student, useless because recruiting, the school learned far too far away from the social requirements, which is computer science graduate students in recent years, many can not find work reasons.