排序方式: 共有9条查询结果,搜索用时 0 毫秒
1
1.
本文通过对军品科研任务性质及规律的分析,指出军品科研质量修理工作的关键环节就是要抓住并管好程序和技术评审工作。 相似文献
2.
3.
First-principles, all-electron, \textit{ab initio} calculations
have been performed to construct an equivalent water potential
for the electronic structure of serine (Ser) in solution. The
calculation is composed of three steps. The first step is to search
for the configuration of the Ser + NH2O system with a minimum
energy. The second step is to calculate the electronic structure of
Ser with the water molecule potential via the self-consistent
cluster-embedding method (SCCE), based on the result obtained in the
first step. The last step is to calculate the electronic structure
of Ser with the dipole potential after replacing the water molecules
with dipoles. The results show that the occupied states of Ser are
raised by about 0.017~Ry on average due to the effect of water. The
water effect can be successfully simulated by using the dipole potential.
The obtained equivalent potential can be applied directly to the
electronic structure calculation of protein in solution by using the
SCCE method. 相似文献
4.
5.
6.
本文通过对航空电子设备腐蚀类型和机理的分析,从电子产品元器件材料的选用、设备结构形式、微生物的防治等方面入手,对航空电子设备腐蚀的控制方式方法进行了探讨。 相似文献
7.
8.
9.
1