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  • Ten Daily Electronic Common Sense-Section 54

    In order to deal with different applications, what kind of coding structure does the HEVC set up for GOP?

    Full intra-frame coding, low-latency coding and random access coding.
    In All Intra coding, each frame of image is predicted and encoded in the spatial domain according to the intra-frame method, and the time reference frame is not used.
    In Low Delay coding, only the first. The frame image is coded in an intra-frame manner, and each subsequent frame is coded as a general P-frame or 8-frame, which is convenient for interactive real-time communication applications.
    In Random Access encoding, it is mainly Hierarchical B Structure, which periodically (about every 1 S) inserts a Clean Random Access frame to become a random access point in the encoded video stream, which is convenient for channel switching, searching and dynamic streaming media services, etc. application.

    What are the extended product terms in the internal structure of the MAX7000 series devices?

    In the internal structure of the MAX7000 series devices, the extended product term can be divided into two forms: one is a shared extended product term, and the other is a parallel extended product term.

    What is the allowed signal?

    The high-frequency signal is a permissible signal. The reception of the high-frequency signal is a necessary condition for the protection to trip, and the failure to receive the high-frequency signal is a sufficient condition for the protection not to trip. With the popularity of optical fiber, Fibre Channel has more ways to transmit allowable signals. The allowable signal can only receive the signal on the opposite side of the line, not the allowable signal on the local side of the line. If the carrier channel is used, the frequency of the signal received and transmitted by Line-N is different.

    There are three low power modes for the transceiver?

    1. Sleep mode is the mode with the lowest power consumption. In this mode, pin INH switches to high impedance, releasing the external voltage regulator. Pin CANL is biased to the battery voltage via pin RTL. If supply voltage is provided, pins RxD and ERR will signal a wake-up interrupt.
    2. Standby mode and sleep mode work the same way, but pin INH is high.
    3. The power-on standby mode is the same as the standby mode. It’s just that the battery power-on flag for this mode is displayed on pin ERR instead of the wake-up interrupt signal. The output of RxD represents the wake-up interrupt. This mode is only used to read the power-up flag.

    The elastic layer can have many functions at the same time.What can it allow?

    • At voltages higher than 1 kV, the elastic layer collapses, thereby electrochemically insulating the entire energy storage system including the shell;
    • Due to the ability to be compressible, the geometric dispersants brought by the manufacturing tolerances in the entire storage can be adsorbed;
    • To improve heat exchange between the entire storage and the outside of the module.

    What are the common infrared sensors?

    1. External photoelectric sensor, also known as photoelectron emitter.
    2. Photoconductive sensor.
    3. Photovoltaic sensor, referred to as photovoltaic detector.
    4. Photoelectric sensor, called photoelectric detector.
    5. Thermistor type infrared sensor.
    6. Thermocouple detector.
    7. Pneumatic detector.
    8. Pyroelectric infrared sensor.

    What is the main function of the Trigger Zone (TZ) module?

    Trigger inputs TZ1~TZ6 can be flexibly programmed and output to any ePWM module.
    Supports one-shot 0SHT under most short-circuit or over-current conditions. Supports cycle-by-cycle trigger (CBC) current limiting operation. Support for the Digital Compare (DC) module involves the Count Compare (CC) module output and/or the TZ1 to TZ3 signals. Either trigger zone input and digital compare output A event 1/2 (DCAE- VT1/2) or digital compare output B event 1/2 (DCBEVT1/2) of the digital compare (DC) module can be assigned as one-shot or cycle control . Any trigger zone input can generate an interrupt. Support software forced trigger. The Trigger Zone (TZ) block can be completely bypassed when not needed.

    What are the types of anti-collision control system sensors?

    • Ultrasonic ranging sensor
    • Angle sonar (angle radar) sensor

    What is an evolutionary algorithm?

    Evolutionary algorithms include genetic algorithms, evolutionary programming, evolutionary programming, and evolutionary strategies, among others.
    The basic framework of the evolutionary algorithm is still the box described by the simple genetic algorithm. But there is a big difference in the way of evolution, there are many changes in selection, crossover, mutation, population control and so on.
    The general block diagram of the evolutionary algorithm can be described: like the genetic algorithm, the convergence of the evolutionary algorithm also has some results. But many results of evolutionary algorithms are extrapolated from genetic algorithms.
    Genetic algorithm pays more attention to the crossover operation, and considers the mutation operation as an auxiliary operation of the algorithm.
    However, evolutionary planning and evolutionary strategies believe that crossover is not superior to mutation in a general sense, and it is even possible to avoid crossover operations.

    What are the characteristics of thermal resistance compared with thermocouples?

    1. The output signal is larger at the same temperature, which is easy to measure. Take 0 ~ 100 ℃ as an example, if the K type thermocouple is used, the output is 4.095 mV; the S type thermocouple output is only 0.643 mV; but when measuring 0 ℃ with platinum thermal resistance, the resistance value is 100 Ω, then 100 ℃ When it is 139.1 Ω, the resistance increment is 39.1 Ω; if copper thermal resistance is used, the increment can reach 42.8 Ω. It is obviously not as easy to measure the millivolt-level electromotive force as to measure the resistance increment of several tens of ohms.
    2. The resistance must be measured with the help of an external power supply. As long as there is a temperature difference between the hot end and the cold end of the thermocouple, an electromotive force will be generated, and it is a power-generating sensor that does not require a power supply; the thermal resistance must pass a current to reflect the resistance change, and it cannot work without a power supply.
    3. The size of the temperature sensing part of the thermal resistance is large, and the working end of the thermocouple is a small solder joint, so the response speed of the thermal resistance temperature measurement is slower than that of the thermocouple.
    4. The thermal resistance made of the same material is not as high as the upper limit of the temperature measurement of the thermocouple. Since the thermal resistance must be wound on the insulating support with thin wires, the physical properties of the support material at high temperatures limit the upper temperature range.


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