1. Overview of three types of non-isolated DC-DC topologies
1.1Buck type converter
The buck converter topology is shown in Figure 2.2 and the buck Converter is also known as a buck-type power supply topology. When the switching tube s is on, the diode VD negative voltage is higher than the positive reverse cutoff, at which time the current is fed through the inductance L to the capacitance and load, while the inductance L stores the energy. When the
with large capacity by yourself3: 13 cm in diameter, 1 m length of poly (vinyl chloride) pipe (wall thickness 0.6-1 cm), PVC pipe will also be, 0.8 cm thick insulation sheet (cannot be wood! Best plastic) about 2.5 square meters, 0.5 cm thick insulation sheet (non-wood !) About 1.5 square meters, all of which can be bought in the home decoration City (that is, those who buy paint, plates, tools, etc.)4: wire, multi-core copper wire, 1000v50a about 6 meters; 10kv1a wire 3 meters5: Pressure-resis
with large capacity by yourself3: 13 cm in diameter, 1 m length of poly (vinyl chloride) pipe (wall thickness 0.6-1 cm), PVC pipe will also be, 0.8 cm thick insulation sheet (cannot be wood! Best plastic) about 2.5 square meters, 0.5 cm thick insulation sheet (non-wood !) About 1.5 square meters, all of which can be bought in the home decoration City (that is, those who buy paint, plates, tools, etc.)4: wire, multi-core copper wire, 1000v50a about 6 meters; 10kv1a wire 3 meters5: Pressure-resis
to HTTP://LOCALHOST:8080/UU);The "/uu" in the forward code represents the relative path to the Web App. such as Http://localhost:8080/Test application (then submitted to HTTP://LOCALHOST:8080/TEST/UU);(using the RequestDispatcher interface Forward) methodForward () cannot redirect to a frame-capable JSP file and can be redirected to a frame-capable HTML file.At the same time forward () can not be passed with parameters at the back, such as Servlet?name=frank, so it is not possible to pass the p
Escape Sequence represents
\
Bell (alert)
\ B
Backspace
\ F
Formfeed
\ N
New Line
\ R
Carriage Return
\ T
Horizontal Tab
\ V
Vertical Tab
\'
Single quotation mark
\"
Double quotation mark
\\
Backslash
\?
Literal question mark
\ Ooo
ASCII character in octal notation
\ Xhh
ASCII character in hexadecimal notation
\ Xhhhh
Unicode Character in hexadecimal notat
output...Log4j. appender. stdout = org. Apache. log4j. leleappenderLog4j. appender. stdout. layout = org. Apache. log4j. patternlayoutLog4j. appender. stdout. layout. conversionpattern = % 5 p [% T]-% m % NObviously, log4j. Logger. CD. itcast. mybatis means to monitor all the ER er actions under the CD. itcast. mybatis package. Run again:Debug [main]-ooo using connection [[email protected]Debug [main]-==> preparing: insert into user (name, hiredate)
("/uu"), relative to the server root path. such as Http://localhost:8080/Test should be(then submit to Http://localhost:8080/uu);The "/uu" in the forward code represents the relative path to the Web App. such as Http://localhost:8080/Test application (then submit toHTTP://LOCALHOST:8080/TEST/UU);(using the RequestDispatcher interface Forward) methodForward () cannot redirect to a frame-capable JSP file and can be redirected to a frame-capable HTML file.At the same time forward () can not be pas
represents the function: u--photoelectric tube, k--switch tube, x--low frequency small power tube, g--high frequency small power tube, d--low-frequency high-power tube, a--high-frequency high-power tube. In addition, the 3DJ type
requires soldering with electric irons or connecting the broken circuit pins back to the good.
Sensitivity variation
Sensitivity variation is a common fault of optical mouse, specific performance for mobile mouse, the cursor unresponsive, do not listen to command. The reasons for the failure and solutions are:
One, light-emitting tube or photosensitive components aging: Optical mouse core IC internal integration has a constant current circuit, wil
phenomenon. Graphics compatibility failure generally occurs in the computer just installed or after the upgrade, more common in the motherboard and video card incompatible or motherboard slots and Kakin fingers can not be fully contacted. Graphics compatibility failure is commonly used to detect the substitution method, the general use of the replacement of the video card to troubleshoot problems.
(3) video card component damage failure:
The failure of the graphics components will usually cau
this calculation, as a resonant cavity, the optimal resonance frequency is around Hz. When such a sound is transmitted from the outer ear canal to the drum, its intensity can be increased by 10 times.
(2) enhancement effect of eardrum and middle ear bone chain
The middle ear includes the main structures such as Eardrum, eardrum, ossiclink, middle ear minor muscle, and throat tube. The relationship between the eardrum, ossiclink, And the egus windo
, the cursor unresponsive, do not listen to command. The reasons for the failure and solutions are:
1 light-emitting Tube or photosensitive element aging: The core IC of the optical mouse has a constant current circuit, the working current of the luminous tube is constant in about 50mA, the high grade mouse generally uses the intermittent sampling technology, the current that sends out is intermittent cond
escape characters to make his structure wrong. TEST | s: 5: "| N; \";-> null. Do we add a value? Add an ooo value.
Submitted: | N; ooo | s: 2: "aa" \ Database: TEST | s: 20: "| N; ooo | s: 2:" aa "; \ "; it has been parsed and written to the database: TEST | s: 20:" | N; ooo | s: 2: "aa ";\"; ["TEST"] => NULL ["20:" "
Description:Based on the HTTP mechanism, if a website does not have the picture information that it says on its page, it can be linked to the image information of other websites. In this way, the site without any resources, using the resources of other sites, to display to the visitors, improve their own traffic. And most of the visitors are not easy to find, some bad sites, in order not to increase the cost of expanding their site content, often misappropriation of links to other sites. On the
remaining low voltage pin is the collector C.
Another method is to use HFE block to judge. After determining the base and tube of the transistor, the base of the transistor is inserted into the LO value measurement hole according to the base position and the tube type, the other two pins are inserted into any two of the remaining three measuring holes, observe the size of the data on the display, find the
--------------------------------------------------------------------------------------------------------------- ----------------------2, before the running process of the background The following example contains three parts: [key input, IR input, digital tube output] + [Event Management] + [numerical calculation and storage]In this example, the timer 0 will be usedOCF0Interrupt timing Detection button and refresh the digital
:apple is my favorite Food.3:football game was not use feet onl Y.18:google is the best tools for search Keyword.19:goooooogle yes!2nd, 3 lines no doubt, because Foo and foo can be accepted!But the 18th line has Google's goo Ah ~ Don't forget, because the line behind the tool too ah! So the line is also listed-that is, 18 lines inside although we do not have the item (goo) but because of the need for the project (too), so it is in line with string search Oh!As in line 19th, the same is true beca
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