Abstract: Disclosed are a tropical cyclone symmetry structure analysis method and apparatus, a device, and a storage medium. TC locations and TC intensities are acquired based on TC best track datasets; polar coordinate systems are created with the TC locations as origins; hourly infrared brightness temperature data are acquired based on satellite data, and are interpolated into the corresponding polar grids to obtain infrared brightness temperature polar grid data; then convection symmetry indexes of inner-core regions of TCs are calculated based on the infrared brightness temperature polar grid data; and finally, the relationship between the convective symmetry indexes and the TC intensities is analyzed.

Abstract: A software code testing system includes sub-engines and a test case database storing test cases. A test case sub-engine runs each of the test cases on a plurality of software code modules, and a software code coverage determination sub-engine identifies a respective software code coverage for each software code method included in each of the software code modules. A test case/software code coverage mapping sub-engine then maps the respective software code coverage for each of the software code methods included in each of the software code modules with the respective test case that was run on that software code module to provide a test case/software code coverage mapping, which is used by a test suite optimization sub-engine to generate a test suite that includes a subset of the test cases that provide a desired level of software code coverage using a minimum number of test cases.

Abstract: A software code testing system includes sub-engines and a test case database storing test cases. A test case sub-engine runs each of the test cases on a plurality of software code modules, and a software code coverage determination sub-engine identifies a respective software code coverage for each software code method included in each of the software code modules. A test case/software code coverage mapping sub-engine then maps the respective software code coverage for each of the software code methods included in each of the software code modules with the respective test case that was run on that software code module to provide a test case/software code coverage mapping, which is used by a test suite optimization sub-engine to generate a test suite that includes a subset of the test cases that provide a desired level of software code coverage using a minimum number of test cases.

Abstract: A method and a current operational module for on-line measurement of battery internal resistance and an on-line measurement instrument for battery internal resistance have high measurement accuracy and strong anti-interference ability. The on-line measurement instrument for battery internal resistance comprises a current work module, a voltage measurement module, an analog to digital conversion module, a signal generation module, a center processing module, an Input/Output module, and a power supply module used for on-line measurement of battery internal resistance.

Abstract: A method and a current operational module for on-line measurement of battery internal resistance and an on-line measurement instrument for battery internal resistance have high measurement accuracy and strong anti-interference ability. The on-line measurement instrument for battery internal resistance comprises a current work module, a voltage measurement module, an analog to digital conversion module, a signal generation module, a centre processing module, an Input/Output module, and a power supply module used for on-line measurement of battery internal resistance.