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电子探针图象分析程序在矿物定量中的应用
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作者 黎晓文 《石河子大学学报(自然科学版)》 CAS 1992年第3期104-109,共6页
利用电子探针的图象处理程序解决矿物定量分析中的问题,以代替传统的球积台测试方法。传统的球积测试方法,是将充片置于球积台上,通过光学显微镜将光片分割成不同的视域,对每个视域进行逐一观察,将观察到的各种不同矿物分别用计数器记... 利用电子探针的图象处理程序解决矿物定量分析中的问题,以代替传统的球积台测试方法。传统的球积测试方法,是将充片置于球积台上,通过光学显微镜将光片分割成不同的视域,对每个视域进行逐一观察,将观察到的各种不同矿物分别用计数器记录下来,这种方法不仅速度慢,而且受到光学显微镜放大倍数和分辨率的限制,使得一些微小矿物被遗漏。目前的电子探针由于具有粒度分析功能,以及高分辨率等,因而使得快速准确地完成这一工作成为可能。 展开更多
关键词 电子探针 能谱 粒度分析 二进制图象
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A New Quantum Gray-Scale Image Encoding Scheme
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作者 mosayeb naseri mona abdolmaleky +3 位作者 fariborz parandin negin fatahi ahmed farouk reza nazari 《Communications in Theoretical Physics》 SCIE CAS CSCD 2018年第2期215-226,共12页
In this paper, a new quantum images encoding scheme is proposed. The proposed scheme mainly consists of four different encoding algorithms. The idea behind of the scheme is a binary key generated randomly for each pix... In this paper, a new quantum images encoding scheme is proposed. The proposed scheme mainly consists of four different encoding algorithms. The idea behind of the scheme is a binary key generated randomly for each pixel of the original image. Afterwards, the employed encoding algorithm is selected corresponding to the qubit pair of the generated randomized binary key. The security analysis of the proposed scheme proved its enhancement through both randomization of the generated binary image key and altering the gray-scale value of the image pixels using the qubits of randomized binary key. The simulation of the proposed scheme assures that the final encoded image could not be recognized visually. Moreover, the histogram diagram of encoded image is flatter than the originM one. The Shannon entropies of the final encoded images are significantly higher than the original one, which indicates that the attacker can not gain any information about the encoded images. 展开更多
关键词 quantum image quantum encoding gray-scale image
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