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Boolean asynchronous systems vs. Daizhan Cheng’s theory 布尔异步系统与成代展理论
Acta et commentationes: Ştiinţe Exacte şi ale Naturii Pub Date : 2022-02-01 DOI: 10.36120/2587-3644.v12i2.132-142
Vlad Serban
{"title":"Boolean asynchronous systems vs. Daizhan Cheng’s theory","authors":"Vlad Serban","doi":"10.36120/2587-3644.v12i2.132-142","DOIUrl":"https://doi.org/10.36120/2587-3644.v12i2.132-142","url":null,"abstract":"The theory of Daizhan Cheng [1] replaces B={0,1} with D={(1/0),(0/1)} and Boolean functions with logical matrices. Interesting and very important algebraical opportunities result, which can be used in systems theory. Our purpose is to give a hint on the theory of Cheng and its application to asynchronicity.","PeriodicalId":340784,"journal":{"name":"Acta et commentationes: Ştiinţe Exacte şi ale Naturii","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127178597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
In memoriam - Academician Mitrofan Choban 纪念米特罗凡·乔班院士
Acta et commentationes: Ştiinţe Exacte şi ale Naturii Pub Date : 2022-02-01 DOI: 10.36120/2587-3644.v12i2.7-18
Liubomir Chiriac, D. Cozma
{"title":"In memoriam - Academician Mitrofan Choban","authors":"Liubomir Chiriac, D. Cozma","doi":"10.36120/2587-3644.v12i2.7-18","DOIUrl":"https://doi.org/10.36120/2587-3644.v12i2.7-18","url":null,"abstract":"Mitrofan Cioban was born on January 5, 1942 in Copceac, Tighina county, Moldova(Romania) in the family of the farmers Mihail and Tecla Cioban. He was the fourth ofthe seven children. His parents encouraged Mitrofan to get as good an education as waspossible at the time. They sent him to a boarding school in the neighboring village ofVolontiri. Then, in 1959, he graduated from the high school of Volontiri village. Aftergraduation, he worked for a year in the local agricultural organization.","PeriodicalId":340784,"journal":{"name":"Acta et commentationes: Ştiinţe Exacte şi ale Naturii","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115704126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On CM-groupoids with multiple identities and medial topological left loops 具有多恒等式和中间拓扑左环的cm -群拟
Acta et commentationes: Ştiinţe Exacte şi ale Naturii Pub Date : 2022-02-01 DOI: 10.36120/2587-3644.v12i2.120-131
Liubomir Chiriac, Natalia Bobeică, Natalia Lupashco, Dorin Pavel
{"title":"On CM-groupoids with multiple identities and medial topological left loops","authors":"Liubomir Chiriac, Natalia Bobeică, Natalia Lupashco, Dorin Pavel","doi":"10.36120/2587-3644.v12i2.120-131","DOIUrl":"https://doi.org/10.36120/2587-3644.v12i2.120-131","url":null,"abstract":"This paper studies some properties of CM-groupoids with multiple identities and medial topological left loops. The conditions for a CM-groupoid to become a CM-quasigroup were found. A new method of constructing non-associative medial topological quasigroups with left identity is given. Various examples of quasigroups with multiple identities have been constructed","PeriodicalId":340784,"journal":{"name":"Acta et commentationes: Ştiinţe Exacte şi ale Naturii","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129434629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamics of a cubic differential advertising model 三次差分广告模型的动力学
Acta et commentationes: Ştiinţe Exacte şi ale Naturii Pub Date : 2022-02-01 DOI: 10.36120/2587-3644.v12i2.63-73
D. Cozma, Vadim Repesco
{"title":"Dynamics of a cubic differential advertising model","authors":"D. Cozma, Vadim Repesco","doi":"10.36120/2587-3644.v12i2.63-73","DOIUrl":"https://doi.org/10.36120/2587-3644.v12i2.63-73","url":null,"abstract":"In this paper a cubic differential advertising model with a singular point O(0,0) is studied. The dynamics of the system is investigated and the global phase portraits are obtained. A small amplitude limit cycle is emitted by the Hopf super critical bifurcation.","PeriodicalId":340784,"journal":{"name":"Acta et commentationes: Ştiinţe Exacte şi ale Naturii","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116840238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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