首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   7篇
  免费   0篇
  国内免费   2篇
化学   3篇
数学   6篇
  2024年   1篇
  2021年   2篇
  2019年   2篇
  2013年   1篇
  2009年   1篇
  2008年   2篇
排序方式: 共有9条查询结果,搜索用时 500 毫秒
1
1.
Let (C,E,s) be an extriangulated category with a proper class ξ of E-triangles.We study complete cohomology of objects in (C,E,s) by applying ξ-projective resolutions and ξ-injective coresolutions constructed in (C,E,s).Vanishing of complete cohomology detects objects with finite ξ-projective dimension and finite ξ-injective dimension.As a consequence,we obtain some criteria for the validity of the Wakamatsu tilting conjecture and give a necessary and sufficient condition for a virtually Gorenstein algebra to be Gorenstein.Moreover,we give a general technique for computing complete cohomology of objects with finite ξ-Gprojective dimension.As an application,the relations between ξ-projective dimension and ξ-Gprojective dimension for objects in (C,E,s) are given.  相似文献   
2.
令A是阿贝尔范畴, T是A的一个自正交子范畴, 且T中每个对象均有有限投射维数和内射维数. 假设左Gorenstein子范畴lG(T)等于T的右正交类,且右Gorenstein子范畴rG(T)等于T的左正交类,我们证明了Gorenstein子范畴$G(T)$等于T的左正交类与T的右正交类之交,并且证明了它们的稳定范畴三角等价于A关于T的相对奇点范畴.作为应用,令$R$是有有限左自内射维数的左诺特环, $_RC_s$是半对偶化双模,且所有内射左$R$-模的平坦维数的上确界有限, 我们证明了 若$\mbox{}_RC$有有限内射(平坦)维数且$C$的右正交类包含$R$,则存在从$C$-Gorenstein投射模与关于$C$的Bass类的交到关于$C$-投射模的相对奇点范畴间的三角等价,推广了某些经典的结果.  相似文献   
3.
4.
5.
6.
Let A be an abelian category,(L) an additive,full and self-orthogonal subcategory of A closed under direct summands,rG((L)) the right Gorenstein subcategory of A relative to (L),and ⊥(L) the left orthogonal class of (L).For an object A in A,we prove that if A is in the right 1-orthogonal class of rG((L)),then the (L)-projective and rG((L))-projective dimensions of A are identical;if the rG((L))-projective dimension of A is finite,then the rG((L))-projective and ⊥(L)-projective dimensions of A are identical.We also prove that the supremum of the (L)-projective dimensions of objects with finite (L)-projective dimension and that of the rG((L))-projective dimensions of objects with finite rG((L))-projective dimension coincide.Then we apply these results to the category of modules.  相似文献   
7.
以镍铬合金为基体,采用电化学方法在其表面沉积制备了纳米Pt电极,用SEM对电极的形貌进行了表征,以亚铁氰化钾为分子探针考察了Pt电极的电化学性能。结果表明该电极对亚铁氰化钾具有稳定、灵敏的电化学响应,并对H2O2的电化学还原具有良好的催化活性。H2O2峰电流与其浓度在0.03-1.0 mmol/L范围内呈良好的线性关系,检出限(S/N=3)为7×10^-6mol/L。相同实验条件下,该纳米Pt电极的催化活性远高于纯Pt电极。  相似文献   
8.
以循环伏安法在镍铬铁基体上制备了Pt-Ru微粒电极, 用SEM表征该微粒电极的形貌呈球形, 循环伏安法和计时电流法考察了该电极的电化学性能. 结果表明Pt-Ru微粒电极对甲醇的电氧化显示出催化作用, Ru的加入提高了电极的抗中毒能力. 在相同的实验条件下, Pt-Ru微粒电极对甲醇的催化氧化性能高于纯铂电极, 且该电极制作成本十分低廉、操作简便、对环境无污染, 极大减少了贵金属铂的用量, 可用作燃料电池的电极材料.  相似文献   
9.
Let A be an abelian category and P(A)be the subcategory of A consisting of projective objects.Let C be a full,additive and self-orthogonal subcategory of A with P(A)a generator,and let G(C)be the Gorenstein subcategory of A.Then the right 1-orthogonal category G(C)~⊥1 of G(C)is both projectively resolving and injectively coresolving in A.We also get that the subcategory SPC(G(C))of A consisting of objects admitting special G(C)-precovers is closed under extensions and C-stable direct summands(*).Furthermore,if C is a generator for G(C)~⊥1,then we have that SPC(G(C))is the minimal subcategory of A containing G(C)~⊥1∪G(C)with respect to the property(*),and that SPC(G(C))is C-resolving in A with a C-proper generator C.  相似文献   
1
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号