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premise A User space virtual memory management mechanism VMA B User space physical memory management mechanism (struct page management under CONFIG_FLATMEM memory model) mmap and brk complete the man...[Details]
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For each function, there are floating-point and fixed-point types. Since the usage is the same, we only use 32-bit floating-point numbers as an example here. 一.BasicMathFunctions 1. Absolute valu...[Details]
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The common local faults of transformer core and their repair process are as follows:
(1) When the insulation between the upper iron yoke sheets is aged and the other parts of the iron core are...[Details]
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Yesterday (29), Jiwei.com reported that GUI Global Products filed a lawsuit, accusing Apple's AirPods and Powerbeats Pro series of products of infringing the magnetic headphone box patent of its bran...[Details]
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According to Taiwan media China Times Electronic News, Taiwan's emerging PCB manufacturer Mutual Co., Ltd. has seen a severe decline in orders due to the impact of the Sino-US trade war on its main e...[Details]
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On April 26, Xixian New District Fengdong New City signed an investment agreement with Shenzhen Shenghong Electric Co., Ltd. Yang Renhua, Secretary of the Party Working Committee of Xixian New Distric...[Details]
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Selection of Oscilloscope Choose a single-trace, dual-trace, or multi-trace oscilloscope, depending on the number of signals to be displayed; Select slow scan, general purpose, high speed or sampling...[Details]
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At present, emerging technologies such as new energy vehicles and
industrial robots
are accelerating their penetration and application, and traditional industries are also actively carrying...[Details]
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Many electronics enthusiasts have this experience: although mid-range and high-end digital multimeters have capacitance test gears, the measurement range is generally only 1pF~20µF, which often can...[Details]
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1. Reasons for high measured hardness values: During the use of the Leeb hardness tester, the impact ball head in the probe repeatedly impacts the surface of the workpiece. After a period of time, th...[Details]
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Shanghai Jinlitai Chemical Co., Ltd. (hereinafter referred to as the "Company") recently received a notice of winning the bid from a leading new energy battery company (hereinafter referred to as t...[Details]
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With the continuous updating of flat panel display technology, large-scale LED display systems use dot matrix modules or pixel units composed of light-emitting diodes to form large-area display scr...[Details]
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Computer Serial Communication Basics With the widespread application of multi-microcomputer systems and the popularization of computer network technology, the communication function of computers is b...[Details]
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According to Jiwei.com, the U.S. Department of Justice has intervened in the case in which the U.S. Federal Trade Commission (FTC) accused Qualcomm, a major mobile phone chip manufacturer, of monopol...[Details]
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Watchdog timer, in the embedded field, some devices need to work in some extreme environments, that is, places where people rarely go or are difficult to go. In the long-term operation, it is inevi...[Details]
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