Electric car charging can also get rid of the long "tail"! The reporter learned from Tianjin University of Technology that the technology of the “Complementary Smart Wireless Grid Based on Scenery and Wind Power Smart Vehicle Charging System†presided over by Professor Yang Qingxin of the school has passed the appraisal. This technology has achieved a large number of innovations with independent intellectual property rights, and the main indicators have reached the international advanced level. It fills another technical gap in domestic electric vehicles. The results have been formally applied in the State Grid Corporation of China, Jiangxi, Shanghai and Hebei provinces. According to reports, as the number of electric vehicles increases, the random access charging of large-scale electric vehicles will bring great uncertainties to the operation of the power grid; the huge amount of electricity used for daily charging will increase the pressure of transmission, transmission and distribution; Some charging methods do not fundamentally reduce the dependence on traditional fossil fuels and truly achieve energy conservation and emission reduction; the use of a large number of power electronic devices in charging equipment also brings harmonic pollution to the power grid. In response to the above-mentioned defects, Professor Yang Qingxin’s scientific research team uses an integrated distributed power supply (photovoltaic, wind power, etc.), load, energy storage system, and control devices to form an independent microgrid to supply electric vehicles. Combining smart micro-grid technology and radio energy transmission technology, it has for the first time achieved a new model of wireless charging for electric vehicles that operates independently of the power grid, avoiding the impact of current and harmonics on the power grid, as if it were installed on an electric vehicle. "Wings" enhances the flexibility of electric vehicle charging. This study establishes a hierarchical control strategy model for microgrids that considers the relation between photovoltaic power and wind power maximum power and load power, and achieves adaptive adjustment of the output voltage reference value following the change of on-board battery charging parameters. The research team proposed the tight and strong coupled collaborative work mode of wireless charging for electric vehicles, integrated the advantages of inductive coupling and near field resonant wireless charging technology, improved the compatibility of coil offset by 30%, and greatly improved the overall energy efficiency index of wireless charging systems. Reducing the threat to the grid caused by the charging of large-scale electric vehicles, and at the same time being able to absorb new energy on the spot, truly achieved “zero emissionsâ€. (Reporter Sun Yusong) Stevia sweeteners are derived from the leaves of the Stevia rebaudiana (Bertoni) plant, an herbal shrub native to South America. The Stevia Plant has been used for food and medicinal purposes for hundreds of years, and its leaves and crude extracts have been sold as dietary supplements. Purified extracts of the sweet substances found in the stevia leaf, called steviol glycosides, are considered to be generally recognized as safe (GRAS) by the U.S. Food and Drug Administration (FDA). However, whole stevia leaves and crude leaf extracts are not permitted to be sold as sweeteners in the U.S. because there is not enough toxicological information on these products, according to the FDA. Stevia sweeteners are made by extracting steviol glycosides from the leaves of the stevia plant and purifying them to remove some of the bitter attributes found in the crude extract. Stevia Stevia JINING USP INTERNATIONAL CO.,LTD. , https://www.uspintl.com