the access page is 25%~33% of the full table pages . In order to be intuitive, the page is usually converted to the number of rows to analyze. When converting, it is important to note that the lookup is a single-page operation, so the number of pages = Rows .The total number of rows in a table is 1,000,000, and each page holds 2 lines, all 500,000 pages. The 25%=125,000,33%=166,000. The tipping point will appear between pages 125,000 and 166,000. Converting rows means 125000/(2*500000) =12.5%,1
When using the STM32 ADC for the detection voltage must be back to the calculation of the voltage value, in order to obtain more efficient voltage, there are now the following three ways:You get the result that the voltage value on your current ad pin is converted to a number relative to 3.3V and 4096.If you get the ad result is ADC_DR this variable, they have the following relationship:adc_dr/Current Voltage value = 4096/3300 MV If you want the curre
, operating income unified tax .Taxable Amount =141700x35%-6750=42845 (yuan)Programme II: The property acts as an individual property of the investor and the transfer proceeds are taxed separately as "proceeds of property transfer" ."Income from transfer of property" taxable amount =41700x20%=8340 (yuan)"Production and operation" Taxable amount =100000x35%-6750=28250 (yuan)Investor Total Taxable Amount =28250+8340=36590 (RMB)Programme two ratio programme one reduced tax burden: 42845-36590=6255
channel to be switched. In the code above, we used channel 0 and Channel 1, and measured the two channels through software switching. Of course, you can also measure the voltage of the eight channels here, just add a few lines of code. Below is:
Qianfan's channel 0 is connected to GND, and channel 1 is connected to VCC.
Is it easy to measure the voltage in this way.
How to Use stm32 adc Conversion
AD calibration is performed first, and only one calibration is required after power-on. Then,
Http://www.hudong.com/wiki/%E8%AF%BA%E5%9F%BA%E4%BA%9A%E6%89%8B%E6%9C%BA%E5%9E%8B%E5%8F%B7%E5%91%BD%E5%90%8D%E8%A7%84%E5%88%99
Model orchestration details:
Each of the Nokia series is also regular:
The model is xx00, such as 3300 or 6600. These are the unique and feature-intensive models in this series. 3300 is an MP3 music mobile phone with obvious positioning and charm. 6600 is a classic.
The
retrieving the very same values 0.210 seconds to fetch 30000 keys using _ KEYS *_.
29000 SET/sec using 12 bytes for both key and value 30000 GET/sec while retrieving the very same values 0.037 seconds to fetch 30000 keys using "KEYS *"".
Test result (in network environment)
3150 SET/sec using 12 bytes for both key and 3150 GET/sec while retrieving the very same 0.212 seconds to fetch 30000 keys using "KEYS *".
3300
2005/09/28
3Com SuperStack II Switch 3300 Configuration:
Prepare a data line to connect the vswitch and PC
Use Windows accessories-communication-Super Terminal
Power on the switch
Press the enter keys on the Super Terminal. The logon prompt is displayed. Enter the default username/password: admin/(no password)
After setting the IP address, you can configure the vswitch in Web mode.
You can use transcend network supervisor to find the vswitch wi
results is analyzed as follows: 1. Thread Thread-0 gets to CPU execution and locks, produces roast duck 3298, sets flag to true. Then, Thread-0 again acquires the CPU execution, because flag is true, so the wait method is executed, blocking. Thread-1 then gets the CPU execution, and because flag is true, the wait method is executed and also blocked.
2. Thread Thread-3 gets the CPU execution right and lock, consumes roast duck 3298, sets flag to false. Then, the thread Thread-0 is awakened, bu
. Applicable
Bernstein Bissot not applicable
Bloom . 2
Bull not Applicable [Email protected]> SELECT last_name, salary, NVL2 (commission_pct,
2 salary + (Salary * commission_pct), Salary) Income
3 from employees WHERE last_name like ' B% '
4 ORDER by last_name;
Last_Name SALARY INCOME
---------------------------------------------
Baer
. Applicable
Bernstein Bissot not applicable
Bloom . 2
Bull not Applicable [Email protected]> SELECT last_name, salary, NVL2 (commission_pct,
2 salary + (Salary * commission_pct), Salary) Income
3 from employees WHERE last_name like ' B% '
4 ORDER by last_name;
Last_Name SALARY INCOME
---------------------------------------------
Baer
The strange problem of power management-Linux general technology-Linux technology and application information. The following is a detailed description. I bought Dell's vostro 1200 and started a complicated installation process. However, this time it was not so smooth. We started it with a gentoo amd64 disk. On that night, emerge-e system, before I successfully started the compiled kernel the next day, it is found that the disk is started again, but it
our single-user and small-and medium-sized enterprise systems still have Ubuntu available. They include some of our elastic and Vostro Laptops and Desktops, as well as popular ECs Mini 10 netbooks and Studio XPS 7100 desktops.
"We just tried to simplify our online services. Based on the user's feedback on reducing complexity and providing a simple purchase experience, we focus on our most popular assembly and preparation options. We have also made s
The new Fedora15 was launched and cannot wait to get started. It formatted the new Ubuntu11.04 and went directly to Fedora15! However, after the installation, the joy of Gnome3 quickly disappeared from the anxiety and sorrow of being unable to install the wireless network card. After almost a day's attempt, I finally installed the wireless network card !! My computer is DELLVostro3400, wireless network card model is DELLHalf-minicard1501, through lspci to view my wireless network card model is:
Article Title: solves the problem of IntelHDAudioController sound card. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
Currently, the sound card of the bottom-end laptop Based on Intel core 2 Duo is generally configured with Intel's "HD Audio Controller" chip. After Ubuntu is installed, there is a sound icon in the system panel, but it cannot be voiced. Ubun
restarting, click OK. The NVIDIA driver must be used to upgrade the kernel each time.
10. Wireless Network CardThe related kernel options areNetworking --->Wireless --->Generic IEEE 802.11 networking stack (mac80211)There are also 4965 drivers.
Although the 4965 wireless NIC driver has been compiled into the kernel, it cannot be used without firmware. I need to copy the firmware of the original kernel to the corresponding directory of the new kernel, the name is the same as the kernel, my ke
as the kernel, my kernel is the linux-image-2.6.25.10dell1400, the directory name is 2.6.25.10dell1400.
Code:Specific commands:
$ CD/lib/firmware/
$ Sudo mkdir 2.6.25.10dell1400
Copy the firmware of 4965 in your old kernel.
$ Sudo CP 2.6.24-16-generic/* 2.6.25.10dell1400/
The above command is equivalent to the following command:$ CD/lib/firmware/$ Sudo CP-r 2.6.24-16-generic/2.6.25.10dell1400/
Restart the system, and the wireless NIC will be normal.
Attached compiled and used machine configura
Recursive, rlsd, rlsrlsd
The server-side program generally has the following processes: bind, listen, and accept. Then there are various operations after the client and the server are connected.
In contrast, the client program is relatively simple. You only need to obtain the sock_id first and connect it with the corresponding sock. The others are as follows.
Server code:
1 #include
Client code:
1 #include
The call is as follows:
Server startup:./rlsd
Client Access:./rls jsonzhang-
recently bought a Dell Vostro 3459 self -windows8 feel not good, so replace the windows7 system. Installation system has not been installed, through Baidu, Google said it is necessary to download the USB3.0 driver. download windows7 USB3.0 driverHttps://downloadcenter.intel.com/zh-cn/download/25476/Windows7-USB3-0Creatorin the D set up the dev directory , the dev directory built USB3,Wim,mount3 folders to USB3.0 Drive inside the Intelxhcisetup\drivers
Now many notebooks are using dual graphics cards, built-in integrated graphics + independent graphics, so you can switch graphics cards according to different environments, such as when playing games to enable independent graphics, the Internet with the use of built-in integrated graphics to achieve energy saving purposes.
Users who use the following computer model will be affected:
The code is as follows
Copy Code
Dell Inspiron N4120, Dell Inspiron N5110, Dell
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