ContentPerformance testing plays an important role in software quality assurance, and it includes a rich variety of test content. The China Software Evaluation Center summarizes the performance test i...

Background introductionTraditional optical microscope (i.e. far-field optical microscope) is the oldest member of the microscope family. It used to be the only way to observe tiny structures. Traditio...

Horizontal originDifferent sea areas have different sea levels. For example, the sea level on the Pacific side of the Panama Canal is 20 cm higher than the sea level on the Atlantic side. Mainland Chi...

System introductionThe ATC system includes four subsystems: automatic train protection (ATP), automatic train driving (ATO), automatic train monitoring (ATS) or centralized dispatch (CTC), and compute...

DefinitionCarrier-to-interference ratio, also known as carrier interference protection ratio, should be expressed as C/I; co-channel interference protection ratio should be expressed as C/Ic; adjacent...

Signal InterpretationSignal is a tool for carrying messages and a carrier of messages. Broadly speaking, it includes optical signals, acoustic signals and electrical signals. For example, the ancient...

Basic informationProduction skillsProduction methodWhen doing financial statements, some tasks are not needed It can also be done by looking at the account book. 1. "Undistributed profit" at the end o...

Performing experienceParticipated in the movie "Congorilla" in 1932. Participating in the movieRelease timeName of the playPlay the roleDirector1932Congorilla --------

CIM-OSA is an open architecture developed by the ESPRIT-AMICE organization composed of 21 companies and universities in the European Community after more than six years of hard work. The CIM-OSA archi...

PrincipleLeak detection, air tightness detection and predictive maintenance, products and solutions in steel and non-ferrous metals, tobacco and food and beverage, automobile manufacturing, chemical i...

Wavelet method is a good time-frequency positioning method that has been developed in recent years and has attracted widespread attention from all walks of life from theory to application. The charact...

Basic information2. Main technical characteristics of JDS-2000 relay protection tester: 1. Input power: AC220V±10%50Hz 2. Nominal Capacity: 0.75KVA (capacity can be increased or decreased according to...

: The advantages of the JDSACN system compared with similar products:Compared with the traditional Gray code plus phase shift method, the measurement accuracy is higher, and the single measurement ran...

Development HistoryOn September 16, 2019, the Wi-Fi Alliance announced the launch of the Wi-Fi6 certification program, which aims to enable the use of next-generation 802.11ax Wi-Fi wireless communica...

BackgroundIn large-scale turbo-generators and large-scale high-voltage AC motors, due to stator winding failures (such as insulation wear, wiring open welding, strand breaks, high electric fields caus...