Of Physics. Two or more the amount of change over time, in the change process to maintain a certain relativity.
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tóng bù
Refers to two or more the amount of change over time in the change process to maintain a relative relationship
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No. 3
Synchronous motor
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No. 4
Synchronous growth
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No. 5
The reform should be carried out simultaneously
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At the same time started, coordinated
At the same time started, coordinated. "Guangming Daily" 1984.6.2: "to accelerate the pace of urban reform, it is necessary to solve the state and enterprises, the relationship between enterprises and workers start to the current situation for the initial distribution from the set of reform measures to, in parallel."
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No. 7
When two devices and working together with the precise time required, it needs to be synchronized between them. Synchronization is required between the two devices based on a common time reference. For example, you want to record 32 tracks of audio signals on two 16-track tape machine, the two tape drives on the transmission shaft need to lock together, this process is called synchronization. If the two devices have not been synchronized, no matter how consistent they start time, the two devices will be due to differences in the mechanical structure and generating a time drift. Desktop music production system often encountered synchronization is usually between sequencer (or sequencer software) carried out with multi-track recorder, the main purpose is to synchronize the different tones of voice midi recorded on separate tracks. Even if you use only one multi-tasking computer (both sequencer, and a digital audio recorder), which itself also exists synchronization problems. Although computer-based digital audio tape recorder than the mechanical equipment to be much more accurate, but if the lack of synchronization, there will be some problems. When two (or more) devices to synchronize, one of which is called the host (internal time code sent its subject), while the other is called a slave. In only one a slave, the synchronization signal can be sent directly from the master to the slave, then the slave clock mode to hit the "external clock mode" (external clock mode). More than one slave, you need a specialized synchronization signal generating device as a host to multiple slave synchronization. Synchronization signal is divided into several types, it is not the same purpose. is one of the more simple midi clock synchronization signal. In midi provisions defined by the master clock of bytes transmitted through midi line is 24ppq (dot clocks per quarter note), but also provides for the music to start, stop, continue to wait for orders. Using these commands, the two sequencers can be easily synchronized. Users can through a midi cable to operate on the host sent to the slave, the slave and the master can make a good synchronization. (In theory this should be done, but will encounter some unexpected problems during the actual operation.) You may have noticed, midi clock and the tempo is a relationship. When the host of the music faster, midi clock sent every second in the points will increase, this time from the music will increase the speed of machine. Another SYNC signal is encoded according to the absolute time from - it contains the hours, minutes and seconds of information, the most common of such time code is called smpte (i.e. English Movie and Television Engineers - society of motion picture and television engineers abbreviation). smpte time code will be divided into hours, minutes, seconds, and frames and place. When using smpte code, the frame frequency is an option frequently used, often use the frame rate was 24, 25 or 30fps (frames per second). Only when the master and slave have chosen the same frame rate, can be very good synchronization. smpte code is an audio signal recorded on the tape is easy or hard disk. Since midi midi cable signal transmitted to a digital signal, the code can not smpte midi direct transmission line. But mtc code (ie English midi time code - midi time code abbreviation) can smpte code is compiled into midi format and transmitted via midi cable. It should be noted here is that the code does not send smpte and mtc start, end and other commands, and it will not change the tempo. They provide is based on points, the absolute time in seconds to calculate the reference, rather than measure, making reference. So if in a few track multitrack recording machine, you then change the sequencer tempo, then again when recording, there will be dislocation, even multitrack machine has been recorded smpte sync with the audio signal and by mtc sequencer well synchronized, also to no avail. For digital audio recording, whether the signal is smpte midi signal or can not provide sufficient accuracy. Precision between the digital audio recording equipment, often require the use of the word sync signal is referred to in synchronism with the clock. Its accuracy is the word, and a sampling frequency is the same - usually occurs 44.1 or 48 per thousand. If you want a digital audio recorder in the word clock sync signals into smpte or other clock code, you need a special hardware device to complete.
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Synchronous programming
Synchronization is a collaborative pace, according to the order be scheduled to run. Such as: Are you finished, I say. "With" easy to understand as the word literally act together. In fact it is not, "with" should refer to the word synergy, assist and cooperate with each other. Such as process, thread synchronization, it is understood as a process or a thread with A and B, have to rely on an execution result of A when B to a certain extent, then stopped, the operation schematically B; B conduct itself executed, then the result to A ; A continuing. The so-called synchronous, that is issuing a function call, before you do not get results, the call will not return, while other threads can not call this method. According to this definition, in fact, the vast majority of functions are called synchronously (eg sin, isdigit, etc.). But in general, we're talking synchronous, asynchronous, when especially those who need to collaborate or other parts will take some time to complete the task. The most common example is the SendMessage. This function sends a message to a window before each message processed, this function does not return. When the other dealt with, LRESULT value of the message handler function and only then returned back to the caller. In multi-threaded programming inside, some sensitive data does not allow simultaneous access by multiple threads, this time on the use of synchronous access technology to ensure the data at any time, at most one thread to access in order to ensure data integrity. In Java, by synchornized synchronize guarantee. Such as class MyTest { private static final Object lock = new Object (); public static synchronized void test () {/ / method to synchronize } public void test2 () { synchronized (lock) {/ / method-level synchronization can also be achieved using this object-level synchronization } } }
pleasantly warm, amalgamation, chord, accommodate, fusion, synthesis, fusion, accord, together, not being in the same state at the same time, Come Accord or chord