OCC and OFC virtual currency

1. Each has its own characteristics, properties and uses
OFC (oxygen free copper): refers to copper with purity greater than 99.95%, oxygen content less than 0.003% and total impurity content less than 0.05%. OCC (single crystal oxygen free copper): refers to the single crystalline copper with purity of more than 99.996% and manufactured by "high temperature hot casting mode continuous casting method". Single crystal copper is further classified into pc-occ and up-occ
single crystal copper (OCC) is a kind of high-purity oxygen free copper. The whole copper rod is composed of only one grain, and there is no "grain boundary" between the grains (the "grain boundary" will reflect and refract the passing signal, causing signal distortion and attenuation), so it has very high signal transmission performance
oxygen free copper (OFC) literally means pure copper without oxygen or any deoxidizer resie. However, according to the oxygen content, oxygen free copper can be divided into No.1 and No.2. The purity of No.1 is 99.97%, the oxygen content is not more than 0.003%, and the total impurity content is not more than 0.03%; The purity of No.2 oxygen free copper is 99.95%, the oxygen content is not more than 0.003%, the total impurity content is not more than 0.003%, and the total impurity content is not more than 0.05%
the wire is not made of one copper. Cutting the wire, we can see that it is generally composed of three strands of wires, each of which is composed of several strands of copper wire, and each layer is separated by an insulating layer. Because of the content of copper, the resistance of single crystal copper is lower than that of ordinary copper, and its toughness is very high. Ordinary copper is broken when it is twisted for 16 turns, and single crystal copper can be twisted for 116 turns.

2. Copper wires transmit evenly at high, medium and low frequencies, but there are many common copper magazines, so it is not suitable to make audio signal transmission lines. Oxygen free copper OFC was used in Japan more than 20 years ago. Due to the rection of impurities, the sound tends to be clear and transparent, but it is not good for low frequencies. With the improvement of smelting and annealing methods, large crystal oxygen free copper lcocc and single crystal oxygen free copper pcocc appear

3. Yuanli Digital Art College

4.

Oxygen free copper

OFC (oxygen free copper): copper with purity of 99.995%. Generally used in audio equipment, vacuum electronic devices, cables and other electrical and electronic applications

There are lc-ofc (linear crystal oxygen free copper or crystal oxygen free copper) with purity of more than 99.995% and OCC (single crystal oxygen free copper) with purity of more than 99.996%

< H2 > extended data:

OFC & quot; It's English; Oxygen Free Copper" Short for & quot; Oxygen free copper;. As we all know, the resistivity of silver in the metal is the smallest and the conctivity is the best. But if silver is used as the proction material of the fever line, its price is very expensive, which is not acceptable to most enthusiasts

as a commonly used metal material, copper has good conctivity and is widely used. However, because copper contains many impurities, most of which are oxides, the conctivity of copper is affected

is called & quot; Intelligent fever line & quot; Of & quot; OFC" Wire, change the metal structure of copper, so that the surface of copper wire has a unique metal structure, so that the surface of the same copper wire is suitable for the transmission of more than 5000Hz frequency signal

< H2 > reference: OFC network

5. TCC system is:
1. The official version of TCC is a CMD replacement command processor, which is compatible with your existing CMD commands and batch files, and adds thousands of new functions. You can improve your work efficiency immediately, and learn and add new functions of TCC according to your own schele< The official version of TCC uses integrated editor and batch file debugger to create and debug batch scripts in a short time
3. The integrated and familiar environment means that you can improve your work efficiency immediately through interactive command prompt and batch file development tasks
4. Consistent syntax can rece your learning and development time
5. Comprehensive help (including context sensitive pop-up help for command line syntax) can speed up development time and rece syntax errors
function introction
1. Create and debug batch scripts with integrated graphical ide. IDE includes tabbed edit windows and complex debuggers with single step, breakpoints, syntax coloring, tool tips, bookmarks, tabbed variables, and monitor windows. Windows batch file programming has never been easier or more powerful
2. TCC command processor is a complete substitute for windows CMD shell
3. TCC script language is a large superset of windows CMD shell, with 245 + internal commands, 395 + internal functions and 299 system variables. Almost all CMD command line commands (such as dir, , del, start, etc.) add hundreds of additional options. More than 200 new commands have been added to TCC. TCC can usually be done in one or two lines, which requires dozens of CMD commands (when CMD can be done)< The script language includes a whole set of extended flow control structure, including if then else, do and for loops, switch, subroutine, batch library, etc
most interactive commands (such as , del, dir, move, Ren, start, etc.) have command dialog boxes that allow you to select file names and options and view the command line before execution. The most powerful windows command processor is also the easiest to use
5. Monitor the hardware and software events of the system, and execute the command when the event is triggered. You can monitor directory changes, clipboards, event logs, Ethernet and WiFi connections, services, processes, and USB and FireWire connections. And all monitoring commands support the TCC command dialog box (see above)
6. You can use aliases to redefine commands, create new commands and functions for general tasks, and assign common commands to a single keystroke
7. Environment variable replacement is greatly enhanced, including nested variables, delay expansion, indirect variables, multidimensional array variables, and direct access to system, user and volatile variables in the registry
8. Select or exclude files by date, time, size, owner and extended wildcards or regular expressions to achieve extraordinary flexibility in file management
9. Specify multiple file names (, del, dir, move, etc.) for most file processing commands, or file names containing file name parameters as options Copy even supports multiple targets and multiple sources.)
10. Various types of I / O redirection can be used, including redirection and pipe to stderr, "in process" pipe, "here document" and "here string" redirection, and tee and Y pipe fittings
11. Browse the command line and directory history, complete the file name and directory, and use the advanced line editor to use a large number of cut and paste options
12. Customize the file name for any internal or external command. This allows TCC to intelligently select and display file names based on the commands you enter
13. Send keystrokes to any application (console or GUI)
14. TCC includes the best text and binary viewer for windows, including two-way scrolling, hexadecimal list, ruler, gridline, extensive search and print functions, etc
15. Search any directory on the system by expanding the directory search and only entering part of the name< TCC includes internal compression and extraction commands for zip, 7zip, tar, jar, gzip and bZIP files
17. You can access FTP, TFTP and HTTP (including SSL and SSH) directories and files in all command processor file processing commands (, del, move, etc.)
18. Use plug-ins to create your own command processor variables or commands, or use many third-party plug-in libraries
19. Built in support includes Perl, Lua, rexx, python, TCL / TK and any windows active scripting language. You can even combine multiple languages in batch scripts
there are thousands more - please refer to our online help for more information
instructions for use
TCC is compatible with any version of Microsoft Windows 7, server 2008R2, Windows 8, server 2012, windows 10 and server 2016, including 64 bit windows. TCC is available in 32-bit and 64 bit versions
there are two versions of TCC, so you can use the version that best suits your needs. See comparing command processors: executing commands, TCC / Le and CMD command lines
command prompt is very important for programmers, system administrators and advanced users. Command behavior offers many advantages to any user who wants to save time, extend control and / or automate tasks
the default Windows command processor (also known as command shell or windows CMD console) is cmd.exe. It is a console application that executes the commands you enter at the prompt and runs a simple batch file (a text file with the extension. Bat or. CMD). Unfortunately, compared with the command processors of other operating systems (such as Linux, with bash, CSH, tcsh, Zsh, etc.), the CMD shell has been seriously lacking in the most basic functions. Since it first appeared in Windows NT 3.1 (released in 1993), the CMD shell has not changed significantly. Due to the inherent limitations of CMD, users are often forced to use GUI to perform inappropriate tasks, or write programs (for example, using C + + or visual basic) to perform simple tasks that CMD shell should be able to handle
for more than 29 years, JP software has been helping developers, system administrators, technical support experts and advanced users save time and money and heal their frustration with CMD shell. TCC is a complete CMD replacement command shell, which provides you with thousands of functions that are not available in CMD (even those Linux shells)
OCC (operation control center in Chinese) is the abbreviation of operating control center. It is the operation control center of (single line) and the management mode of "one line, one center". For urban rail transit, it is mainly responsible for the subway operation and scheling of a city. For the subway, it is responsible for the train dispatching in a certain area
OCC (operating control center) is a management mode of "one line, one center"

the metro control center is used to dispatch, direct and monitor the whole process of metro operation, such as train operation, power supply, station equipment operation, disaster prevention and alarm, environmental monitoring, ticketing management and passenger service; The central nervous system;. The operation control center can control multiple metro lines in the network.

6.

The ADR of hotel instry is room revenue / actual number of rooms sold

the OCC of hotel instry is the actual number of rooms sold / the number of rooms available for sale< br />

7. "Ordinary" is a relative concept, generally refers to OFC - oxygen free copper, which is made of oxygen free copper. The purity of the earphone cable is below 99.99%

single crystal copper refers to OCC - Ohno Continuous Casting. Continuous casting OFC in high temperature hot casting mode makes copper crystallize as a whole, further reces signal distortion, improves attenuation characteristics, obtains better electrification performance and improves sound transmission quality. Compared with OFC, compliant OCC can further improve the sound quality. In hifi acoustic instry, OCC is mostly used to make wire base of signal cable, earphone cable, power cable and loudspeaker wire. Single crystal copper wire should not be bent excessively. Once part of the crystal copper is broken, it will get twice the result with half the effort

the purity of OFC or OCC is difficult to forge. The higher the purity, the better the sound rection, which is proportional to the price. The number of digits is represented by N. for example, single crystal copper with 99.99% purity is abbreviated as 4N OCC. Common purity in 3 ~ 6N, 7 ~ 8N are used for regular manufacturers of hi end wire

generally speaking, the entry-level to middle end earphones are basically 4N, and many middle and high-end in ear earphones also use 5-7n cable base. For example, the Sony ex-1000 is ofc7n. Hi end flagship headphones, depending on the sound quality requirements, tuning and cost trade-off in 5 ~ 6N. Basically, the low-end wire rod is limited to the process and technology, and the style is the selling point. The high-end wire rod emphasizes the quality and certain tuning requirements consistent with the equipment, and the top wire rod must be integrated

in hifi equipment, the thickness, number of strands, plug quality, welding method, braiding method, shielding capacity, length and so on of OCC cable base will affect the quality of sound signal transmission. However, the influence on sound (including style) is directly related to personal hearing and the sensitivity of the equipment used. The more expensive the equipment is, the greater the influence of wire will be, Especially for power sensitive equipment with more than 10000 yuan

for example, AWG standard in the United States, a function is used to express the wire thickness. Generally speaking, it is not recommended to use less than 4N / 28Awg single strand OCC for headphones over 1000 yuan. Most high-end hifi headphones with 5N / 28Awg single strand * 152 strands or 5N / 22Awg single strand * 128 strands are enough.

8.

4N oxygen free copper is 4N OFC. N of audio wire refers to purity. For example, 99.998% copper is 4N copper. OFC is short for oxygen free copper

most earphone wires are made of copper. Generally, the higher the purity is, the better the conctivity is, and the smaller the signal distortion is

the common ones are:

TPC (electrolytic copper): purity of 99.5%

OFC (oxygen free copper): purity of 99.995%

lc-ofc (linear crystalline oxygen free copper or crystalline oxygen free copper): purity of more than 99.995%

OCC (single crystal oxygen free copper): the highest purity, more than 99.996%, which is divided into pc-occ and up-occ

from the most common earplug, it is generally 4N OFC. When it comes to earphones, they are usually made of 4N to 5N OFC wires, and the cores are mostly made of stranded wires, which are not only thick, but also have significantly enhanced tensile strength

extended data:

oxygen free copper is further divided into No.1 and No.2 oxygen free copper according to oxygen content and impurity content. The purity of No.1 oxygen free copper is 99.97%, the oxygen content is not more than 0.003%, and the total impurity content is not more than 0.03%; The purity of No.2 oxygen free copper is 99.95%, the oxygen content is not more than 0.003%, and the total impurity content is not more than 0.05%

Oxygen free copper has no hydrogen embrittlement, high conctivity, good processability and weldability, corrosion resistance and low temperature performance. The standard of oxygen content in different countries is not the same, there are some differences

OFC (oxygen free copper): copper with purity of 99.995%. Generally used in audio equipment, vacuum electronic devices, cables and other electrical and electronic applications. Among the oxygen free copper, lc-ofc (linear crystalline oxygen free copper or crystalline oxygen free copper): purity is more than 99.995%, and OCC (single crystal oxygen free copper): purity is the highest, more than 99.996%, which is also divided into pc-occ and up-occ

the single crystal oxygen free copper made by up-occ technology has no directivity, high purity, anti-corrosion and extremely low electrical impedance, which makes the wire suitable for high-speed and high-quality signal transmission

9.

1. ADR (average daily rate): room revenue / actual number of rooms sold

2. OCC (occupancy): room occupancy rate

occupancy rate refers to the occupancy rate of hotel rooms. It is calculated as a percentage of all rooms sold divided by the total number of rooms available for sale

general account: if there are two people or more than two rooms, all expenses incurred are recorded in a specific account, which will be settled uniformly at the time of settlement. This account is called the general account

adrindex: ADR index is an index for ADR, because ADR is an absolute quantity for a single hotel, and ADR index is used to measure the comparison between the average house price of a hotel and the average house price of a market segment

Room status: general room status includes: OC, OD, VC, VD, ooo, etc

2. Mod: the full name is manager on ty, which generally refers to being appointed as the representative of the general manager within the specified time, responsible for the hotel's customer service and quality, and ensuring the safety of guests

OCC index: market penetration index. An index for OCC. Market penetration index is used to measure the share of hotels in a certain market segment

4. RevPAR index: income index of each saleable house. It is used to calculate the market share of a hotel's revenue per available room in its market segment

10. ADR (average daily rate) - average room price of rooms sold
the average room price of rooms sold is calculated by dividing the room revenue by the number of rooms actually sold
[alternative indicator: average published rate (APR) - average rate. When the hotel census report or annual report does not provide relevant information about ADR, the rate can be used as a reference to calculate the approximate average rate (ADR).]
ADR = room revenue / number of rooms actually sold
occupancy (OCC) - occupancy rate
occupancy rate refers to the ratio of the number of rooms actually sold to the number of rooms available for sale in a specific period
occupancy = number of rooms sold / number of rooms available
RevPAR (revenue per available room) - revenue per room available
revenue per room available (RevPAR) is equal to the revenue of rooms divided by the number of rooms available for sale. RevPAR is different from ADR in that the denominator of the former is the number of rooms available for sale and the latter is the number of rooms actually sold
RevPAR = occupancy x ADR