排序方式: 共有9条查询结果,搜索用时 15 毫秒
1
1.
Investigation of the energy confinement in ohmic and lower hybrid current drive (LHCD) plasmas in HT-7 has been performed. In ohmic discharges at low densities the global energy confinement time rE increases almost linearly with the density, saturates at a critical density (2.5×10^13/cm^3 for HT-7) and is nearly constant at higher densities. The energy confinement time is in good agreement with the Neo-Alcator scaling law at different densities and currents. In the LHCD plasmas the global energy confinement time similar to that of the L-mode discharges has been observed to be in good agreement with the low confinement mode (L mode) scaling law of ITER89-P in higher electron density and plasma current. 相似文献
2.
采用高效液相色谱法测定不同产地老鹳草中的没食子酸含量,比较其含量差异,采用的流动相为乙腈-0.1 mol/L磷酸(2∶98),流速为1.0 mL/min,检测波长为272 nm。结果表明,没食子酸对照品溶液在10~120μg/mL范围内呈良好线性关系,浓度与峰面积的回归方程为:A=19.112c-125.47,相关系数r2=0.999 7,平均回收率为101.33%,RSD为1.04%。由此建立的高效液相色谱法可以简便、快速、准确地测定不同产地老鹳草中没食子酸的含量。 相似文献
3.
张晓卿 《河北建筑工程学院学报》2003,21(3):20-22
液压负荷传感技术应用于挖掘机中,使机器的微调性能好,减少了溢流和管路压力损失,节省发动机功率,提高工作效率. 相似文献
4.
5.
聚噻吩的重要衍生物聚(3,4-乙撑二氧噻吩)(PEDOT)是应用最成功的导电高分子聚合物之一。以苯并噻二唑为受体单元,设计合成了前驱体化合物4,7-二(2,3-二氢-噻吩并[3,4-b][1,4]二噁英-5-基)苯并[1,2,5]噻二唑(EDOT-BT-EDOT),发现其具有优异的桔红色发光性能,对其进行电聚合能够获得相应聚合物材料P(EDOTBT-EDOT)。聚合物材料表现出良好的电化学活性和稳定性以及平整致密的表面形貌。 相似文献
6.
采用RP-HPLC测定美沙拉嗪肠溶片中5-氨基水杨酸(5-ASA)的含量。柱前衍生化使样品中5-ASA乙酰化,采用反相高效液相色谱法,色谱柱为ODS C18,流动相为磷酸盐缓冲液-乙腈(92∶8),流速为0.9 m L·min-1,检测波长为304 nm。结果表明,5-ASA在3.12~50.0μg·m L-1范围内线性关系良好(r=0.999 6),平均回收率为100.8%,RSD为1.27%,柱前衍生化高效液相色谱法测定美沙拉嗪肠溶片中5-ASA的含量简便、快速、准确、专属性强,适用于美沙拉嗪肠溶片中5-ASA的含量测定。 相似文献
7.
9.
Electron heating via lower hybrid current drive (LHCD) has been investigated in HT-7 superconducting tokamak. Experiments show that the central electron temperature Te0, the volume averaged electron temperature 〈 Te 〉 and the peaking factor of the electron temperature QTe = Teo/〈 Te 〉 increase with the lower hybrid wave (LHW) power. Simultaneously the electron heating efficiency and the electron temperature as the function of the central line-averaged electron density (ne) and the plasma current (Ip) have also been investigated. The experimental results are in a good agreement with those of the classical collision theory and the LHW power deposition theory. 相似文献
1