The dielectric properties of bst thin film were measured at room temperature and liquid nitrogen temperature with the parallel - plate capacitor structure . the dielectric constant and loss tangent were 1200 and 0 . 0045 respectively at 1mhz , and 77k 77k时,薄膜的相对介电常数‘和最大介电损粮御心沁分别为1200和0 .恻5 ;外加直流偏厂巨30v , bst薄膜的介电可调性能为60 % ;性能因数k值达到133 。
In china , there are some common problems concerned with small hydropower projects , such as insufficient annual utilization of electronic power , a great loss of power in the process of transmission , poor apparatus , low level of automation , low prices of electronic power , and outdated technology and installation 我国小水电项目的常见问题有:年利用小时数偏低、输配电电损较大、生产设备质量较差、自动化水平低、电价过低、技术和设备落后、管理水平低等。
电: electricity损: decrease; lose电损耗: electrical loss电损伤: elecric injury; electrical injury电损失: electric losses; electrical loss厂用电损耗: house-service consumption充电损失: charging loss; loss of charge导电损耗: conduction loss低压电损伤: low voltage electrical injury电损耗模量: electrical loss modulus电损耗谱: electrical loss spectra电损毁仪: lesion making device电损指示器: electric loss indicators; loss indicators (electric )放电损害: discharging lesion高压电损伤: high voltage electrical injury供电损耗: current supply loss供电损失: current supply loss; loss of power介电损耗: dielectric loss介电损耗角: dielectric loss angle; dielectric phase angle介电损耗率: dielectric dissipation fraction介电损失: dielectric loss; dissipation loss介电损失角: dielectric loss angle馈电损耗: current supply loss; feeder loss漏电损耗: leakage loss漏电损失: leakage loss