Abstract: The present invention discloses a method for testing different hormones based on different time periods of pregnancy preparation, including four method steps: fertility test, ovulation test, ovulation confirmation test and pregnancy test. The present invention provides a set of systematic and perfect pregnancy preparation management plan for pregnancy preparation women, which can provide reasonable and effective test guidance for pregnancy preparation women, helps pregnancy preparation women to determine and analyze various hormone test results, and gives corresponding suggestions based on the test results to better help women complete the pregnancy preparation process. The present invention comprehensively and systematically analyzes and determines various hormone levels of women during pregnancy preparation, with high accuracy and reliable analysis results.

Abstract: The present disclosure relates to non-clamping method and apparatus for identification of dead underground power utility cable.

Abstract: A dynamic series voltage compensator (10) for compensating voltage dips in an ac electric power system is described. The compensator (10) has a controller (11) coupled to control a respective series injection inverter (12a, 12b, 12c). The controller (11) monitors a supply voltage with/on a respective phase. Inputs from monitoring the supply voltage are processed by the controller (11) to generate control signals. These control signals are based on comparing voltage magnitude of a present voltage cycle period with voltage magnitude of a preceding voltage cycle period of the supply voltage. When difference between the present and the preceding voltage cycle periods exceeds a predetermined value for a corresponding time period, and inverter control signal is provided to the respective series injection inverter (12a, 12b, 12c) to thereby provide a compensation voltage. The compensation voltage is injected directly to the respective conductor.