The del operator is also called nabla operator(named because it is shaped like a Greek harp nabla),Hamilton operator,or Hamiltonian.
del算子也叫nabla算子(因其符号形似希腊nabla竖琴而得名),哈密顿算子或汉密尔顿算子。
The Causes for Dense Reservoirs of Triassic-Lower Jurassic in Hami Depression;
哈密坳陷三叠系——下侏罗统致密储集层形成原因
Observation on Life History of Liriomyza Sativae Blanchard in Hami Area of Xinjiang;
哈密地区美洲斑潜蝇生活史的观察
Review on explosion puffing drying by modified temperature and pressure for Hami-melon;
哈密瓜变温压差膨化干燥技术研究进展
Explosion Puffing Drying of Hami-melon at Modified Temperature and Pressure;
哈密瓜变温压差膨化干燥工艺研究
Occurrence and control of bacterial wilt of Hami-melon in Hainan;
海南哈密瓜细菌性枯萎病的发生及防治
Optimization of explosion puffing drying technology for Hami melon at variable temperature and pressure difference;
哈密瓜变温压差膨化干燥工艺优化研究
Study on the preservatives of hami melon fruit at ambient temperature BIAN;
哈密瓜常温贮运保鲜剂的研制
The vacuum deep fried technology of Hami melon crisps;
哈密瓜脆片真空油炸工艺技术
Analysis of the Present Situation of Surface Water Resources in Hami,Xinjiang;
哈密地区地表水资源现状分析
The frail ecological environment,low forest coverage rate and degraded meadow in hami due to attaching importance to resource exploitation and looking down on environment protection.
哈密地区生态环境十分脆弱,森林覆盖率低,草场退化严重,近几年经济发展速度加快,但重开发、轻保护,资源开发和经济增长方式粗放,使生态系统遭到破坏。
Nature condition of hami is very frail.
哈密地区自然条件十分脆弱,长期以来重开发、轻保护,资源开发和经济增长方式粗放,使生态系统遭到破坏。