Constructing a comprehensive prosperity evaluation index system from the dimensions of“affluence”and“commonality,”consisting of 23 detailed indicators,this study utilizes the entropy method and provincial panel da...Constructing a comprehensive prosperity evaluation index system from the dimensions of“affluence”and“commonality,”consisting of 23 detailed indicators,this study utilizes the entropy method and provincial panel data from 2011 to 2020 to measure the level of common prosperity across Chinese provinces.The research findings indicate an overall upward trend in the common prosperity development level among provinces during the sample period.Beijing,Shanghai,Zhejiang,Guangdong,and Jiangsu exhibit the highest common prosperity indices at the provincial level.From a spatial perspective,significant disparities exist in the common prosperity levels among different regions.Consequently,policy recommendations are proposed:Tailoring strategies for regional development based on realities,reinforcing regional coordinated development,and promoting the advancement of common prosperity.展开更多
Activated coal obtained from mango residues is an alternative for the valorisation of these wastes for applications. This work focuses on the production of a new adsorbent from mango residues collected in the urban co...Activated coal obtained from mango residues is an alternative for the valorisation of these wastes for applications. This work focuses on the production of a new adsorbent from mango residues collected in the urban common of Mamou (Republic of Guinea) by chemical activation with potassium hydroxide. To do this, the different rates: humidity, cinders, volatile matter, fixed carbon et iodine indices before activation and after activation at 400°C and 700°C were determined which are: (6.28%;0.97%;73.80%;25.23%) respectively. The best indices were found in powdered activated coal compared to grain activated coal for the concentrations used. This study can be an alternative bio-adsorbent for the urban community of Mamou in water treatment.展开更多
Let V = {a1,a2 ,...,an} be a finite set with n ≥ 2 and Pn（V） the set of all primitive binary relations on V. For Q E Pn（V）, denote by G（Q） the directed graph corresponding to Q. For positive integer d ≤ n, let...Let V = {a1,a2 ,...,an} be a finite set with n ≥ 2 and Pn（V） the set of all primitive binary relations on V. For Q E Pn（V）, denote by G（Q） the directed graph corresponding to Q. For positive integer d ≤ n, let Pn（V, d） = {Q ： Q ∈ Pn（V） and G（Q） contains exactly d loops}. In this paper, it is proved that the set of common consequent indices of binary relations in Pn （V, d） is {1, 2,..., n -[d/2] }. Furthermore, the minimal extremal binary relations are described.展开更多
Let(RP^(n),F)be a bumpy and irreversible Finsler n-dimensional real projective space with reversibilityλand flag curvature K satisfying(λ/1+λ)^(2)<K≤1 when n is odd,and K≥0 when n is even.We show that if there...Let(RP^(n),F)be a bumpy and irreversible Finsler n-dimensional real projective space with reversibilityλand flag curvature K satisfying(λ/1+λ)^(2)<K≤1 when n is odd,and K≥0 when n is even.We show that if there exist exactly 2[n+1/2]prime closed geodesics on such(RP^(n),F),then all of them are non-contractible,which coincides with the Katok’s examples.展开更多
文摘Constructing a comprehensive prosperity evaluation index system from the dimensions of“affluence”and“commonality,”consisting of 23 detailed indicators,this study utilizes the entropy method and provincial panel data from 2011 to 2020 to measure the level of common prosperity across Chinese provinces.The research findings indicate an overall upward trend in the common prosperity development level among provinces during the sample period.Beijing,Shanghai,Zhejiang,Guangdong,and Jiangsu exhibit the highest common prosperity indices at the provincial level.From a spatial perspective,significant disparities exist in the common prosperity levels among different regions.Consequently,policy recommendations are proposed:Tailoring strategies for regional development based on realities,reinforcing regional coordinated development,and promoting the advancement of common prosperity.
文摘Activated coal obtained from mango residues is an alternative for the valorisation of these wastes for applications. This work focuses on the production of a new adsorbent from mango residues collected in the urban common of Mamou (Republic of Guinea) by chemical activation with potassium hydroxide. To do this, the different rates: humidity, cinders, volatile matter, fixed carbon et iodine indices before activation and after activation at 400°C and 700°C were determined which are: (6.28%;0.97%;73.80%;25.23%) respectively. The best indices were found in powdered activated coal compared to grain activated coal for the concentrations used. This study can be an alternative bio-adsorbent for the urban community of Mamou in water treatment.
基金Foundation item： the Natural Science Foundation of Jiangsu Province （No. BK2007030） the Natural Science Foundation of Education Committee of Jiangsu Province （No. 07KJD110207）.
文摘Let V = {a1,a2 ,...,an} be a finite set with n ≥ 2 and Pn（V） the set of all primitive binary relations on V. For Q E Pn（V）, denote by G（Q） the directed graph corresponding to Q. For positive integer d ≤ n, let Pn（V, d） = {Q ： Q ∈ Pn（V） and G（Q） contains exactly d loops}. In this paper, it is proved that the set of common consequent indices of binary relations in Pn （V, d） is {1, 2,..., n -[d/2] }. Furthermore, the minimal extremal binary relations are described.
基金The first author was partially supported by National Key R&D Program of China(Grant No.2020YFA0713300)NSFC(Grant Nos.11671215 and 11790271)+1 种基金LPMC of MOE of China and Nankai Universitythe second author was partially supported by NSFC(Grant Nos.11771341 and 12022111)。
文摘Let(RP^(n),F)be a bumpy and irreversible Finsler n-dimensional real projective space with reversibilityλand flag curvature K satisfying(λ/1+λ)^(2)<K≤1 when n is odd,and K≥0 when n is even.We show that if there exist exactly 2[n+1/2]prime closed geodesics on such(RP^(n),F),then all of them are non-contractible,which coincides with the Katok’s examples.
