A new and distinct cultivar of Impatiens plant named \u2018Tamar White Improved\u2019, characterized by its upright and outwardly spreading growth habit; mounded plant form; freely branching habit; dark green-colored leaves; freely flowering habit; large white-colored flowers; and good garden performance. This composition contains a vinyl-group-containing compound represented by general formula. The method further comprises determining a combining vector based on the effective channel, and determining a feedback vector based on the combining vector and the real channel. The pillar is ion implanted to form an ion-doped area in the pillar corner acting as a SD area.