Encryption of vector maps, used for copyright Beginner+ protection, is of importance in the community of geographic information sciences.However, some studies adopt one-to-one mapping to scramble vertices and permutate the coordinates one by one according to the coordinate position in a plain map.An attacker can easily obtain the key values by anal
Green beans was used as the research material, based on gas chromatography ion mobility spectroscopy (GC-IMS) and gas chromatography-mass spectrometry (GC-MS), the odor fingerprints of green beans were analyzed under 9 different treatments, including frying, Butter Dishes steaming, boiling, quick freezing, precooling, freeze-drying, bleaching and d
Today we know much about the culture of the Viking Age, but there are still gaps to fill.One of them is what the legendary weapon called atgeirr in Icelandic sagas really was.Nowadays researchers prefer to view atgeir as a kind of spear.But the defining features of atgeir are not clearly described and the range of different kinds of spearheads Driv