The work is intended to achieve optimum culture conditions of α-galactosidase production by a mutant strain Aspergillus foetidus ZU-G1 in solid-state fermentation (SSF). Certain fermentation parameters involving mois...The work is intended to achieve optimum culture conditions of α-galactosidase production by a mutant strain Aspergillus foetidus ZU-G1 in solid-state fermentation (SSF). Certain fermentation parameters involving moisture content, incubation temperature, cultivation period of seed, inoculum volume, initial pH value, layers of pledget, load size of medium and period of cultivation were investigated separately. The optimal cultivating conditions of α-galactosidase production in SSF were 60% initial moisture of medium, 28 °C incubation temperature, 18 h cultivation period of seed, 10% inoculum volume, 5.0～6.0 initial pH of medium, 6 layers of pledget and 10 g dry matter loadage. Under the optimized cultivation conditions, the maximum α-galactosidase production was 2 037.51 U/g dry matter near the 144th hour of fermentation.展开更多
In this paper, the shallow water problem is discussed. By treating the incompressible condition as the constraint, a constrained Hamilton variational principle is presented for the shallow water problem. Based on the ...In this paper, the shallow water problem is discussed. By treating the incompressible condition as the constraint, a constrained Hamilton variational principle is presented for the shallow water problem. Based on the constrained Hamilton variational principle, a shallow water equation based on displacement and pressure （SWE-DP） is developed. A hybrid numerical method combining the finite element method for spa- tial discretization and the Zu-class method for time integration is created for the SWE- DP. The correctness of the proposed SWE-DP is verified by numerical comparisons with two existing shallow water equations （SWEs）. The effectiveness of the hybrid numerical method proposed for the SWE-DP is also verified by numerical experiments. Moreover, the numerical experiments demonstrate that the Zu-class method shows excellent perfor- mance with respect to simulating the long time evolution of the shallow water.展开更多
柏林新博物馆(Neues Museum zu Berlin)中展品—空间关系的发展与处理策略极具代表性,但以往研究仅在建筑实体修复方面进行展开。该研究对其展品—空间关系类型、各类型典型展厅存在的问题沿革和应对策略进行了解析,试图填补对新博物馆...柏林新博物馆(Neues Museum zu Berlin)中展品—空间关系的发展与处理策略极具代表性,但以往研究仅在建筑实体修复方面进行展开。该研究对其展品—空间关系类型、各类型典型展厅存在的问题沿革和应对策略进行了解析,试图填补对新博物馆展品—空间关系发展的认知空白,并从这个经典个案出发,探索可以借鉴和推广的分析与设计方法。研究表明,新博物馆中存在三种典型的展品—空间关系,契合不同的展陈任务且应用了不同的空间展陈设计手法予以平衡。新博物馆的展品—空间关系发展历久弥新,是同类建筑中同类问题发展的一个缩影,对我国博物馆的设计与改造具有深远的借鉴价值。展开更多
文摘The work is intended to achieve optimum culture conditions of α-galactosidase production by a mutant strain Aspergillus foetidus ZU-G1 in solid-state fermentation (SSF). Certain fermentation parameters involving moisture content, incubation temperature, cultivation period of seed, inoculum volume, initial pH value, layers of pledget, load size of medium and period of cultivation were investigated separately. The optimal cultivating conditions of α-galactosidase production in SSF were 60% initial moisture of medium, 28 °C incubation temperature, 18 h cultivation period of seed, 10% inoculum volume, 5.0～6.0 initial pH of medium, 6 layers of pledget and 10 g dry matter loadage. Under the optimized cultivation conditions, the maximum α-galactosidase production was 2 037.51 U/g dry matter near the 144th hour of fermentation.
基金Project supported by the National Natural Science Foundation of China(No.11472067)
文摘In this paper, the shallow water problem is discussed. By treating the incompressible condition as the constraint, a constrained Hamilton variational principle is presented for the shallow water problem. Based on the constrained Hamilton variational principle, a shallow water equation based on displacement and pressure （SWE-DP） is developed. A hybrid numerical method combining the finite element method for spa- tial discretization and the Zu-class method for time integration is created for the SWE- DP. The correctness of the proposed SWE-DP is verified by numerical comparisons with two existing shallow water equations （SWEs）. The effectiveness of the hybrid numerical method proposed for the SWE-DP is also verified by numerical experiments. Moreover, the numerical experiments demonstrate that the Zu-class method shows excellent perfor- mance with respect to simulating the long time evolution of the shallow water.
文摘柏林新博物馆(Neues Museum zu Berlin)中展品—空间关系的发展与处理策略极具代表性,但以往研究仅在建筑实体修复方面进行展开。该研究对其展品—空间关系类型、各类型典型展厅存在的问题沿革和应对策略进行了解析,试图填补对新博物馆展品—空间关系发展的认知空白,并从这个经典个案出发,探索可以借鉴和推广的分析与设计方法。研究表明,新博物馆中存在三种典型的展品—空间关系,契合不同的展陈任务且应用了不同的空间展陈设计手法予以平衡。新博物馆的展品—空间关系发展历久弥新,是同类建筑中同类问题发展的一个缩影,对我国博物馆的设计与改造具有深远的借鉴价值。
