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The equivalent proposition of an unsolved number theory problem "is the difference between two primes" 未解数论问题“两个素数之差”的等价命题
Greener Journal of Science, Engineering and Technological Research Pub Date : 2019-04-19 DOI: 10.15580/GJSETR.2019.1.040919065
Mi Zhou, Suqian Economy, Shi Honwei, Zhang Delong, Jiang Xingyi, He Songting
{"title":"The equivalent proposition of an unsolved number theory problem \"is the difference between two primes\"","authors":"Mi Zhou, Suqian Economy, Shi Honwei, Zhang Delong, Jiang Xingyi, He Songting","doi":"10.15580/GJSETR.2019.1.040919065","DOIUrl":"https://doi.org/10.15580/GJSETR.2019.1.040919065","url":null,"abstract":"This paper uses chandra symmetric matrix to find the equivalent proposition of a worldly unsolved problem.","PeriodicalId":226217,"journal":{"name":"Greener Journal of Science, Engineering and Technological Research","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128100820","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
Even numbers are the sum of two prime numbers 偶数是两个素数的和
Greener Journal of Science, Engineering and Technological Research Pub Date : 2019-04-19 DOI: 10.15580/GJSETR.2019.1.040919068
Shi Honwei, Mi Zhou, Zhang Delong, Jiang Xingyi, He Songting
{"title":"Even numbers are the sum of two prime numbers","authors":"Shi Honwei, Mi Zhou, Zhang Delong, Jiang Xingyi, He Songting","doi":"10.15580/GJSETR.2019.1.040919068","DOIUrl":"https://doi.org/10.15580/GJSETR.2019.1.040919068","url":null,"abstract":"\"Even numbers are the sum of two prime numbers.\" This is the description of Goldbach's conjecture, and in Canadian Gaye's book \"unsolved problems in number theory\", it is an open question to put forward a contrary conjecture that \"even numbers are the difference between two prime numbers\". In this paper, Chandra sieve is used to deduce that the sum of large and even numbers is the sum of two prime numbers, and that \"even numbers are the difference between two prime numbers\" is a great possibility. At the same time, it is possible to guess the possibility of twin prime conjecture.","PeriodicalId":226217,"journal":{"name":"Greener Journal of Science, Engineering and Technological Research","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116505550","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: 3
A number of conjectures are likely to setup 许多猜想可能成立
Greener Journal of Science, Engineering and Technological Research Pub Date : 2019-04-19 DOI: 10.15580/GJSETR.2019.1.040919067
Mi Zhou, Suqian Economy, Wei Hong
{"title":"A number of conjectures are likely to setup","authors":"Mi Zhou, Suqian Economy, Wei Hong","doi":"10.15580/GJSETR.2019.1.040919067","DOIUrl":"https://doi.org/10.15580/GJSETR.2019.1.040919067","url":null,"abstract":"An unresolved conjecture in number theory has great possibility to set up.","PeriodicalId":226217,"journal":{"name":"Greener Journal of Science, Engineering and Technological Research","volume":" 24","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120830773","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
Some even expressed as 1+1 or 1-2, 1-4, 1-c, 1+2 can also be expressed as 1-3 有的甚至表示为1+1或1-2、1-4、1-c, 1+2也可以表示为1-3
Greener Journal of Science, Engineering and Technological Research Pub Date : 2019-04-19 DOI: 10.15580/GJSETR.2019.1.040919066
Mi Zhou, Shi Honwei, Zhang Delong, Jiang Xingyi, He Songting
{"title":"Some even expressed as 1+1 or 1-2, 1-4, 1-c, 1+2 can also be expressed as 1-3","authors":"Mi Zhou, Shi Honwei, Zhang Delong, Jiang Xingyi, He Songting","doi":"10.15580/GJSETR.2019.1.040919066","DOIUrl":"https://doi.org/10.15580/GJSETR.2019.1.040919066","url":null,"abstract":"According to known conclusions, even numbers can be expressed as 1+2, 1+5, 3+2, 1+c. So this paper derives conclusions partial even expressed as 1+1 or 1-2, 1-4, 1-c, 1+2 can also be expressed as 1-3.","PeriodicalId":226217,"journal":{"name":"Greener Journal of Science, Engineering and Technological Research","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127612409","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
Vortex Pattern on a Fixed Reynold’s Number with Varying Aspect Ratio, and Vice Versa in a Lid Driven Square Cavity 在固定雷诺数和变宽高比下的旋涡模式，反之亦然
Greener Journal of Science, Engineering and Technological Research Pub Date : 2018-06-20 DOI: 10.15580/gjsetr.2018.2.061718084
Aliyu A. Baba, Bello Zubairu, Sunday Ayigun
{"title":"Vortex Pattern on a Fixed Reynold’s Number with Varying Aspect Ratio, and Vice Versa in a Lid Driven Square Cavity","authors":"Aliyu A. Baba, Bello Zubairu, Sunday Ayigun","doi":"10.15580/gjsetr.2018.2.061718084","DOIUrl":"https://doi.org/10.15580/gjsetr.2018.2.061718084","url":null,"abstract":"DOI: 10.15580/GJSETR.2018.2.061718084 The modelling of flow for laminar fluid in lid driven square cavity was conducted by employing a code that run in MATLAB and in the first simulation, a fixed value of the Reynold’s number of 600 was maintained, it was observed from the figures and results that as the aspect ratios were varied (increased) from 0.3, 0.4 and 0.6, the vortex tends to increase in number of streamlines closing the spaces between each other and widening to occupy the bottom right. However, in the second simulation, where the aspect ratio of 0.2 was maintained and varying different Reynolds numbers of 400, 500 and 600, the vortex formed also increases and becoming too close to one another as the Reynold’s number increases, thereby indicating that the pressure coefficient inside the lid square cavity is controlled by the aspect ratio as well as the Reynold’s number. Submitted: 17/06/2018 Accepted: 22/06/2018 Published: 27/06/2018","PeriodicalId":226217,"journal":{"name":"Greener Journal of Science, Engineering and Technological Research","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127382817","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
Investigation of Water Distribution Characteristics for Large Cannon Irrigation Sprinkler under different Spacing and Layouts 不同间距和布局下大型喷灌喷头水量分布特性研究
Greener Journal of Science, Engineering and Technological Research Pub Date : 2018-05-25 DOI: 10.15580/gjsetr.2018.1.040618056
Zakaria Issaka, Mohammed Issah, P. Yamba
{"title":"Investigation of Water Distribution Characteristics for Large Cannon Irrigation Sprinkler under different Spacing and Layouts","authors":"Zakaria Issaka, Mohammed Issah, P. Yamba","doi":"10.15580/gjsetr.2018.1.040618056","DOIUrl":"https://doi.org/10.15580/gjsetr.2018.1.040618056","url":null,"abstract":"DOI: 10.15580/GJSETR.2018.1.040618056 Relevant factors affecting the irrigation performance of large cannon sprinkler include the nozzle diameter, operating pressure, layout form, and overlapping distance, which were studied under no wind conditions. The discharge coefficient ranged from 0.96 to 0.99. A mathematical model of radius of throw was regressed and the coefficient of determination was 0.9765. The application rate was lower near the sprinkler, and the highest value occurred under the radius of throw from 4 to 6 m for each water distribution pattern. The average application rate decreased with increase in operating pressure. The average application rate increased with the increase in nozzle diameter. The increased or decreased in magnitude of average application rate under small nozzle diameter was larger than the large nozzle diameter for the same range pressure variations. The maximum CU values increased with increase in pressure under different nozzle diameter or different layouts. Triangular layout gave higher uniformities compared with square layout. The optimal CU values and spacing coefficients of large cannon sprinkler with different layouts, pressure and nozzle diameter were proposed. Submitted: 06/04/2018 Accepted: 18/04/2018 Published: 25/05/2018","PeriodicalId":226217,"journal":{"name":"Greener Journal of Science, Engineering and Technological Research","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133204174","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: 1
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