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Coding2.1 Digital Sound Signal(1). Frequency of Sound: (2). Sampling--Quantization--code:Sampling frequency: The Nyquist theory states that the sampling frequency should not be less than twice times the maximum frequency of the sound signal, so that the voice can be restored to the original sound as a digital expression, which is called lossless digitization (lossless digitization) Sampling accuracy: Number of bits per sound sample (bps)Amount of data (Bytes/sec) = (sampling frequency (Hz
on the object to allow other threads to lock and access the object. When other threads access an object, the calling thread will wait. The pulse signal is used to notify the waiting thread of changes to the object state. Pulse (), pulseall () sends signals to one or more waiting threads. This signal indicates that the status of the waiting thread lock object has changed, and the lock owner is ready to rele
fm31256 can be calibrated by software, and the Cal bit (D2) of the H address can be set, the clock enters the CALIBRATION mode, and the comparator outputs the frequency signal of Hz, you can also set the 01h address's cal4 ~ Cal0 bits (D4 ~ D0) determine the calibration value. When the Cal bit (D2) of the H address is 0, the system enters the comparator mode.(2) Processor CompanionThe Processor Companion includes the features that are commonly required by the CPU. The system monitors the interr
In the official Application note, we can see that the PCNT oversampling routine uses a 32 Khz clock source as the reference clock source. There is also an orthogonal code. Although the external signal is used as the clock of the PCNT module, we rarely use orthogonal code. In addition, we can better master this function only when we have used it. Therefore, we still use our STK to understand how PCNT uses external signals as the clock. But one thing to note is that synchronization is a problem. I
provides guidance such as "observing the pulse evidence, knowing what is wrong, treating with evidence", and "serving the patients. From then on, I have a clearer understanding of the specialist. The clinical thinking of traditional Chinese medicine is quite different from that of physicians of different genres in different ages. In particular, the clinical thinking of the managers has a certain detached characteristic. Observation of disease, the ch
PCM Definition PCM Chinese called pulse code modulation, composed of. rivers proposed in 1937 that this concept laid the foundation for digital communication. In 1960s, it began to be applied to the local telephone network to expand the capacity, so that the transmission capacity of most existing audio cable core lines was increased by 24 ~ 48 times. By the middle and end of 1970s, various countries have successfully modulated
connects the capacitor to either end of the resistor or from a point of the circuit to the public potential, and sets a channel for the AC signal or pulse signal, avoid voltage drop Attenuation Caused by the resistance of the AC signal. 4. in the AC signal processing circuit, the coupling station capacitor is used to connect the signal source and the signal processing circuit or to connect the two amplifiers in a stage to cut off the DC and let the A
different pathological images. If the wet Xie stays behind the meridian, then the symptoms can be seen as heavy as wrapped, physically heavy, orJoint flexion and extension are unfavorable. The answer to the question: "All kinds of rigidity are wet ". It is equal to the muscles and muscles of the neck department. Due to the wet resistance, it is not soft, causing the neck to be urgent and the movement disorder. Chest tightness and cough if wet and burntYellow; wet Yang zhongjiao, then the upper
Two-Way Signaling and Races) An important feature of the Monitor. Pulse method is that it is executed asynchronously, which means that calling the pulse method does not block itself waiting for the Monitor. Pulse to return. If any thread waits on the pulsed object, it will not be blocked. In other words, calling Monitor. Puls
Neural Network It is a collection of neurons, and neurons have the following behavior in the biological perspective:(1) being restrained or excited;(2) explosive growth and platforms;(3) can generate a reverse attack after suppression;(4) adaptability.It has the following features: 1. Activation and inhibition of neurons The activation and inhibition of a neuron are characterized by different potentials between the inside and outside of the cell membrane.In the inhibition state, there is a posit
Enq Did Did Alert ACK Alert Nak Alert Soh Sid Did Did CP Data CRC
From Baidu Duty Cycle The duty cycle (Duty Cycle) has the following meanings in the telecom field: In a string of ideal pulse sequences (such as square waves), the ratio of the duration of the Positive pulse to the total cycle of the pulse. For example, if the pulse width is 1 μs, the duty cycle of the
In electronic technology, the pulse signal is a pulse signal continuously sent at a certain voltage range and at a certain interval. The interval between pulses is called a cycle, and the number of pulses generated per unit time (for example, 1 second) is called a frequency. Frequency is the metering name that describes the number of pulses that appear in a periodic cycle signal (including a
2012/etc/sudo.confMv:move Mobile Command function: Used to move files or rename files, often used to back up files or directories;2. Command format:MV [options] Source...source destination3. Parameter Description:-f:fource forcibly, if the target already exists will not ask for direct coverage;-i:interactive interaction, ask before overwriting;-u:update Update, if the target file already exists and the source file is newer before it is updated;-t:target target, specify the target
2012/etc/sudo.confMv:move Mobile Command function: Used to move files or rename files, often used to back up files or directories;2. Command format:MV [options] Source...source destination3. Parameter Description:-f:fource forcibly, if the target already exists will not ask for direct coverage;-i:interactive interaction, ask before overwriting;-u:update Update, if the target file already exists and the source file is newer before it is updated;-t:target target, specify the target
1.c4.5 algorithm2. K-mean-value clustering algorithm3. Support Vector Machine4. Apriori Correlation algorithm5.EM maximum expectation algorithm expectation maximization6. PageRank algorithm7. AdaBoost Iterative algorithm8. KNN algorithm9. Naive Bayesian algorithm10, CART classification algorithm.1.c4.5 algorithmWhat does C4.5 do? C4.5 constructs a classifier in the form of a decision tree. To do this, you need to give a collection of data that has been categorized by C4.5 expression content.Wait
Netcom 218.104.84.46:15358 HTTP 40,4376,4376 Jiangsu province Nanjing Netcom 202.118.74.160:8080 HTTP 3015,3465,3465 Dalian University Science and Technology Park 202.101.46.97:80 HTTP 3405,8282,8282 Shanghai City 221.2.208.34:1080 SOCKS4 270,9984,13309 Shandong province Liaocheng Netcom 61.235.105.45:3128 HTTP 6579,9393,9413 Guangdong province Huizhou railcom ADSL 202.99.204.66:3128 HTTP 6760,9935,9935 Shanxi province Yuncheng Netcom 202.175.58.10:80 HTTP 3836,18216,18216 Macau University of S
I. Overview of the JPEG principle Second, the JPEG principle detailed analysis and the compression algorithm process 1. Color model Conversion (color models) 2. DCT (discrete cosine Transform discrete cosine transform) 3. Data quantification 4. Reorder DCT Results 5. DC coding based on differential pulse coded modulation 6, RLE Code 7. Paradigm Huffman Coding 8, JPEG compression process summary
. The principle of measuring optical fiber loss by backscattering method is similar to the principle of radar detection target. When the input of the measured fiber is injected into a strong light pulse, the light pulse is transmitted inside the fiber, because of the inhomogeneity inside the fiber will produce Rayleigh scattering (of course, the connector and the breakpoint of the fiber will produce more st
discharge, the mathematical description of the discharge process is This indicates that the discharge voltage at both ends of the capacitor is attenuated to zero, and t can be determined by the time at which the curve decays to 0.37E. The charge-discharge curve is shown in Figure 2. 2. Half-Life T1/2 Another characteristic value that is more easily measured in the experiment than the time constant tau, called the Half-life T1/2, which is the time required when UC (T) drops to the initi
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