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This article tries to personify potassium ferrioxalate crystal as "I" to describe the formation process and the factors affecting the growth of potassium ferrioxalate crystal. After growing into beautiful green crystals, I dreamed I was participating in the jewelry beauty contest. A serious of wonderful conversations between emerald and I revealed the properties and applications of potassium ferrioxalate crystal. It inspires and guides students to understand the growth of crystals and their properties, and it also stimulates students' interest in studying chemistry. 相似文献
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This short novel combines the romantic poetry with the rigorous chemistry through Xiao Hua's journey to the kingdom of poetry. It elaborates the wonderful and useful chemistry via what Xiao Hua saw, heard, felt in the kingdom of poetry, helping people appreciate the beauty of chemistry and motivate students to learn and research chemistry. It also expresses that scientists may achieve success if they take the correct methods and pay persistent efforts in the scientific research. 相似文献
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We designed and implemented a signal generator that can simulate the output of the NaI(Tl)/CsI(Na)detectors’pre-amplifier onboard the Hard X-ray Modulation Telescope(HXMT).Using the development of the FPGA(Field Programmable Gate Array)with VHDL language and adding a random constituent,we have finally produced the double exponential random pulse signal generator.The statistical distribution of the signal amplitude is programmable.The occurrence time intervals of the adjacent signals contain negative exponential distribution statistically. 相似文献