scholarly journals DE-FOA-EE0005502 Advanced Percussive Drilling Technology for Geothermal Exploration and Development Phase II Report.

2017 ◽  
Author(s):  
Jiann-Cherng Su ◽  
David W. Raymond ◽  
Somuri V. Prasad ◽  
Dale R. Wolfer
Keyword(s):  
Phase Ii ◽  
Development Phase ◽  
Percussive Drilling ◽  
Geothermal Exploration ◽  
Drilling Technology ◽  
Exploration And Development

scholarly journals Occurrence of geothermal resources and prospects for exploration and development in China

2019 ◽  
pp. 014459871989582
Author(s):  
Yanguang Liu ◽  
Guiling Wang ◽  
Xi Zhu ◽  
Tingxin Li
Keyword(s):  
Emission Reduction ◽  
Technology Innovation ◽  
Structure Optimization ◽  
Energy Structure ◽  
Geothermal Resources ◽  
Geothermal Exploration ◽  
Key Technologies ◽  
Accumulation Mechanism ◽  
Rapid Industrialization ◽  
Exploration And Development

Under the background of China’s energy structure optimization, environmental protection, energy conservation, and rising pressure of emission reduction, geothermal, as a potential strategic replacement energy, has ushered in new opportunities and challenges. This paper systematically summarizes the domestic achievements in the exploration and development of geothermal resources, analyzes the endowment, distribution, and accumulation mechanism of geothermal resources in China, and points out the main problems existing in the exploration and development of geothermal resources in China. On this basis, it looks forward to China’s urgent geothermal exploration and development work and key technologies to be urgently developed, providing important guidance for China’s geothermal science and technology innovation and rapid industrialization development.

scholarly journals Rape embryogenesis. III. Embryo development in time

2014 ◽  
Vol 49 (4) ◽  
pp. 369-385 ◽  
Author(s):  
Teresa Tykarska
Keyword(s):  
Growth Rate ◽  
Phase I ◽  
Phase Ii ◽  
Apical Cell ◽  
Phase Iii ◽  
Development Phase ◽  
Embryo Axis ◽  
Intensity Maximum ◽  
Relative Growth ◽  
Growth Intensity

It was found that the growth curve of the rape embryo axis is of triple sigmoid type. Embryo growth occurs in 3 phases corresponding to 3 different periods of development. Phase I includes growth of the apical cell up to it's division into two layers of octants. Phase II comprises the increase of the spherical proembryo to the change of its symmetry from radial to bilateral. Phase III includes, growth of the embryo from the heart stage up to the end of embryogenesis. In each phase the relative growth rate increases drastically and then diminishes. The differences in growth intensity during the same phase are several-fold. The growth intensity maximum of the embryo axis occurs in phase II. The phasic growth intensity maxima occur: in phase I during apical cell elongation, :before its division, and in phases II and III in the periods of cell division ;growth in globular and torpedo-shaped -shaped embryos.

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