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Haar wavelet fractional derivative 哈尔小波分数阶导数
IF 0.9 4区 综合性期刊
Proceedings of the Estonian Academy of Sciences Pub Date : 2022-01-01 DOI: 10.3176/proc.2022.1.05
C. Cattani
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引用次数: 2
The effect of inoculation with arbuscular mycorrhizal fungi on root traits and salt tolerance of Tagetes erecta 接种丛枝菌根真菌对万万菊根系性状及耐盐性的影响
IF 0.9 4区 综合性期刊
Proceedings of the Estonian Academy of Sciences Pub Date : 2022-01-01 DOI: 10.3176/proc.2022.4.08
Y. Zhai, L. Xing, X. Hu, W. Li, X. Tang, S. Guo
{"title":"The effect of inoculation with arbuscular mycorrhizal fungi on root traits and salt tolerance of Tagetes erecta","authors":"Y. Zhai, L. Xing, X. Hu, W. Li, X. Tang, S. Guo","doi":"10.3176/proc.2022.4.08","DOIUrl":"https://doi.org/10.3176/proc.2022.4.08","url":null,"abstract":"","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69934014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The comparison of the feeding of European perch Perca fluviatilis L. larvae in littoral and pelagic habitats of northern temperate lakes 北温带湖泊沿岸和中上层栖地鲈鱼幼鱼摄食的比较
IF 0.9 4区 综合性期刊
Proceedings of the Estonian Academy of Sciences Pub Date : 2022-01-01 DOI: 10.3176/proc.2022.4.04
K. Karus, M. Zagars, H. Agasild, T. Feldmann, A. Tuvikene, L. Puncule, P. Zingel
{"title":"The comparison of the feeding of European perch Perca fluviatilis L. larvae in littoral and pelagic habitats of northern temperate lakes","authors":"K. Karus, M. Zagars, H. Agasild, T. Feldmann, A. Tuvikene, L. Puncule, P. Zingel","doi":"10.3176/proc.2022.4.04","DOIUrl":"https://doi.org/10.3176/proc.2022.4.04","url":null,"abstract":"","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69934321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Laser beam positioning in quasi-simultaneous laser transmission welding of polymers 聚合物准同步激光传输焊接中的激光束定位
IF 0.9 4区 综合性期刊
Proceedings of the Estonian Academy of Sciences Pub Date : 2022-01-01 DOI: 10.3176/proc.2022.4.05
S. M. Jankus, R. Bendikiene
{"title":"Laser beam positioning in quasi-simultaneous laser transmission welding of polymers","authors":"S. M. Jankus, R. Bendikiene","doi":"10.3176/proc.2022.4.05","DOIUrl":"https://doi.org/10.3176/proc.2022.4.05","url":null,"abstract":"","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69934335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bacterial spore’s fluorescence dependence on vaporised hydrogen peroxide concentration 细菌孢子对过氧化氢汽化浓度的荧光依赖性
IF 0.9 4区 综合性期刊
Proceedings of the Estonian Academy of Sciences Pub Date : 2022-01-01 DOI: 10.3176/proc.2022.2.02
S. Babichenko, H. Hakkarainen, M. Kirm, L. Poryvkina, O. Rebane
{"title":"Bacterial spore’s fluorescence dependence on vaporised hydrogen peroxide concentration","authors":"S. Babichenko, H. Hakkarainen, M. Kirm, L. Poryvkina, O. Rebane","doi":"10.3176/proc.2022.2.02","DOIUrl":"https://doi.org/10.3176/proc.2022.2.02","url":null,"abstract":"","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69933185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Limits in the category Seg of Segal topological algebras Seg拓扑代数范畴Seg中的极限
IF 0.9 4区 综合性期刊
Proceedings of the Estonian Academy of Sciences Pub Date : 2022-01-01 DOI: 10.3176/proc.2022.2.07
M. Abel
{"title":"Limits in the category Seg of Segal topological algebras","authors":"M. Abel","doi":"10.3176/proc.2022.2.07","DOIUrl":"https://doi.org/10.3176/proc.2022.2.07","url":null,"abstract":"","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69933473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Efficient capital management using an internal model: a case of non-life insurance 利用内部模型进行有效资本管理:以非寿险为例
IF 0.9 4区 综合性期刊
Proceedings of the Estonian Academy of Sciences Pub Date : 2022-01-01 DOI: 10.3176/proc.2022.3.08
I. Zariņa-Cīrule, G. Pettere, I. Voronova
{"title":"Efficient capital management using an internal model: a case of non-life insurance","authors":"I. Zariņa-Cīrule, G. Pettere, I. Voronova","doi":"10.3176/proc.2022.3.08","DOIUrl":"https://doi.org/10.3176/proc.2022.3.08","url":null,"abstract":". The main goal of insurance company management is to increase shareholders’ value and implement a strategy that promotes sustainable growth of the company. Well-known possible measures intended to achieve that goal are as follows: share price, economic value, market capitalisation, gross premiums earned and solvency ratio. These measures include efficient capital management as capital expenses could be a major cost position depending on risk appetite and the extent of capital needed to support it. This research focuses on non-life insurers for reserve risk modelling. In the current study, a more accurate risk quantification model has been developed than the standard model provided by the EU regulator under the Solvency II framework. The proposed model provides capital cost gains as well. A case study based on non-life real data set with underwriting in the Baltic countries is discussed with inclusion of pandemic trends that had an impact on economies and customer behaviours. The study considers different non-life reserve distributions for each insurance business line, risk aggregation and the way of choosing the most appropriate type of copula model for non-life reserve risk. Adequate capital is calculated by applying value at risk at 99.5%, which is mandatory in the EU market. The study considers which selected tests have to be implemented in order to choose the most appropriate copula model for reserve risk. at risk.","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69933526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Aza-peptides: expectations and reality aza肽:期望与现实
IF 0.9 4区 综合性期刊
Proceedings of the Estonian Academy of Sciences Pub Date : 2022-01-01 DOI: 10.3176/proc.2022.3.05
A. Ploom, A. Mastitski, Meeli Arujõe, Alla Troska, J. Järv
{"title":"Aza-peptides: expectations and reality","authors":"A. Ploom, A. Mastitski, Meeli Arujõe, Alla Troska, J. Järv","doi":"10.3176/proc.2022.3.05","DOIUrl":"https://doi.org/10.3176/proc.2022.3.05","url":null,"abstract":". The replacement of the α -carbon atom in an α -amino acid structure by a nitrogen atom yields alkylcarbazic acids, also known as α -aza amino acids. Although the topology of α -amino acids and α -aza amino acids is similar, their chemical and stereochemical properties are significantly different. For this reason, the application of the common solid-phase peptide synthesis (SPPS) protocol cannot be used for aza-peptide bond synthesis without changes. On the other hand, the aza-peptide bond is more stable than the common peptide bond, therefore these compounds are very attractive targets for drug design. In this review, we summarize data on aza-peptide bond chemistry, with implications for the improvement of aza-peptide chemical synthesis.","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69933784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Optical solitons in fiber Bragg gratings with quadratic-cubic law of nonlinear refractive index and cubic-quartic dispersive reflectivity 具有二次-三次非线性折射率和三-四次色散反射率的光纤Bragg光栅中的光孤子
IF 0.9 4区 综合性期刊
Proceedings of the Estonian Academy of Sciences Pub Date : 2022-01-01 DOI: 10.3176/proc.2022.2.05
E. Zayed, M. Alngar, A. Biswas, M. Ekici, Salam Khan, A. K. Alzahrani, M. Belić
{"title":"Optical solitons in fiber Bragg gratings with quadratic-cubic law of nonlinear refractive index and cubic-quartic dispersive reflectivity","authors":"E. Zayed, M. Alngar, A. Biswas, M. Ekici, Salam Khan, A. K. Alzahrani, M. Belić","doi":"10.3176/proc.2022.2.05","DOIUrl":"https://doi.org/10.3176/proc.2022.2.05","url":null,"abstract":". This paper recovers cubic-quartic perturbed solitons in fiber Bragg gratings with quadratic-cubic law nonlinear refractive index. The unified Riccati equation expansion method and the modified Kudryashov’s approach make this retrieval of soliton solutions possible. The parameter constraints, for the existence of such solitons, are also presented","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69933051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Gershgorin disk theorem in complex interval matrices 复区间矩阵中的Gershgorin盘定理
IF 0.9 4区 综合性期刊
Proceedings of the Estonian Academy of Sciences Pub Date : 2022-01-01 DOI: 10.3176/proc.2022.1.06
S. Chakraverty, S. Maiti
{"title":"Gershgorin disk theorem in complex interval matrices","authors":"S. Chakraverty, S. Maiti","doi":"10.3176/proc.2022.1.06","DOIUrl":"https://doi.org/10.3176/proc.2022.1.06","url":null,"abstract":"","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69933275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","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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