scholarly journals Driving Control Technologies of New High-Efficient Motors

2020 ◽  
Author(s):  
Chang-Ming Liaw ◽  
Min-Ze Lu ◽  
Ping-Hong Jhou ◽  
Kuan-Yu Chou
Keyword(s):  
High Efficient ◽  
Control Technologies

"Cyber warrior": Information superiority through advanced multi-sensory command and control technologies

2000 ◽  
Author(s):  
Gilbert G. Kuperman ◽  
Randall D. Whitaker ◽  
Scott M. Brown
Keyword(s):  
Command And Control ◽  
Control Technologies ◽  
And Control

Review of Current Situation of Agricultural Non-Point Source Pollution and Its Prevention and Control Technologies

2018 ◽  
Vol 20 (5) ◽  
pp. 23
Author(s):  
Shuxia Wu ◽  
Hongbin Liu ◽  
Shen Liu ◽  
Yaosheng Wang ◽  
Baojing Gu ◽  
...  
Keyword(s):  
Point Source ◽  
Prevention And Control ◽  
Current Situation ◽  
Point Source Pollution ◽  
Control Technologies ◽  
And Control ◽  
Non Point Source Pollution

Novel NVH reducing Two-Teeth Winding for High Efficient PMSM Wind Generator Applications

2020 ◽  
Author(s):  
Andreas Greifelt ◽  
Christian Roth ◽  
Gurakuq Dajaku ◽  
Fei Lu ◽  
Dieter Gerling
Keyword(s):  
Wind Generator ◽  
High Efficient

Development and Construction of Domestic High-Efficient Small-Capacity Power Equipmen

Vestnik MEI ◽  
2018 ◽  
Vol 6 (6) ◽  
pp. 33-42
Author(s):  
Pavel V. Roslyakov ◽  
◽  
Bronislav G. Grisha ◽  
Igor L. Ionkin ◽  
Mikhail N. Zaichenko ◽  
...  
Keyword(s):  
High Efficient ◽  
Small Capacity

Advanced high efficient liquid transport garments

1973 ◽  
Author(s):  
W. ELKINS ◽  
W. WILLIAMS
Keyword(s):  
Liquid Transport ◽  
High Efficient

Ultrathin Carbon Nanosheets for Highly-efficient Capacitive K-ion and Zn-ion Storage

2020 ◽  
Author(s):  
Yamin Zhang ◽  
Zhongpu Wang ◽  
Deping Li ◽  
Qing Sun ◽  
Kangrong Lai ◽  
...  
Keyword(s):  
Energy Storage ◽  
Porous Carbon ◽  
Metal Ion ◽  
Rate Capability ◽  
Energy Storage Devices ◽  
Capacity Retention ◽  
Carbon Nanosheets ◽  
Storage Devices ◽  
High Efficient ◽  
Ion Storage

<p></p><p>Porous carbon has attracted extensive attentions as the electrode material for various energy storage devices considering its advantages like high theoretical capacitance/capacity, high conductivity, low cost and earth abundant inherence. However, there still exists some disadvantages limiting its further applications, such as the tedious fabrication process, limited metal-ion transport kinetics and undesired structure deformation at harsh electrochemical conditions. Herein, we report a facile strategy, with calcium gluconate firstly reported as the carbon source, to fabricate ultrathin porous carbon nanosheets. <a>The as-prepared Ca-900 electrode delivers excellent K-ion storage performance including high reversible capacity (430.7 mAh g<sup>-1</sup>), superior rate capability (154.8 mAh g<sup>-1</sup> at an ultrahigh current density of 5.0 A g<sup>-1</sup>) and ultra-stable long-term cycling stability (a high capacity retention ratio of ~81.2% after 4000 cycles at 1.0 A g<sup>-1</sup>). </a>Similarly, when being applied in Zn-ion capacitors, the Ca-900 electrode also exhibits an ultra-stable cycling performance with ~90.9% capacity retention after 4000 cycles at 1.0 A g<sup>-1</sup>, illuminating the applicable potentials. Moreover, the origin of the fast and smooth metal-ion storage is also revealed by carefully designed consecutive CV measurements. Overall, considering the facile preparation strategy, unique structure, application flexibility and in-depth mechanism investigations, this work will deepen the fundamental understandings and boost the commercialization of high-efficient energy storage devices like potassium-ion/sodium-ion batteries, zinc-ion batteries/capacitors and aluminum-ion batteries.</p><br><p></p>

Sand Free Production Success Through Proven Technology Enabler from An Untapped Heterogeneous Reservoir Zone Utilizing Gravel Pack Replacement Methodology

2020 ◽  
Author(s):  
Y. Anggoro
Keyword(s):  
Oil And Gas ◽  
Erosion Resistance ◽  
Cost Effective ◽  
High Rate ◽  
Screen Design ◽  
Sand Control ◽  
Rules Of Thumb ◽  
Production Success ◽  
Control Technologies ◽  
Gravel Pack

The Belida field is an offshore field located in Block B of Indonesia’s South Natuna Sea. This field was discovered in 1989. Both oil and gas bearing reservoirs are present in the Belida field in the Miocene Arang, Udang and Intra Barat Formations. Within the middle Arang Formation, there are three gas pay zones informally referred to as Beta, Gamma and Delta. These sand zones are thin pay zones which need to be carefully planned and economically exploited. Due to the nature of the reservoir, sand production is a challenge and requires downhole sand control. A key challenge for sand control equipment in this application is erosion resistance without inhibiting productivity as high gas rates and associated high flow velocity is expected from the zones, which is known to have caused sand control failure. To help achieve a cost-effective and easily planned deployment solution to produce hydrocarbons, a rigless deployment is the preferred method to deploy downhole sand control. PSD analysis from the reservoir zone suggested from ‘Industry Rules of Thumb’ a conventional gravel pack deployment as a means of downhole sand control. However, based on review of newer globally proven sand control technologies since adoption of these ‘Industry Rules of Thumb’, a cost-effective solution could be considered and implemented utilizing Ceramic Sand Screen technology. This paper will discuss the successful application at Block B, Natuna Sea using Ceramic Sand Screens as a rigless intervention solution addressing the erosion / hot spotting challenges in these high rate production zones. The erosion resistance of the Ceramic Sand Screen design allows a deployment methodology directly adjacent to the perforated interval to resist against premature loss of sand control. The robust ceramic screen design gave the flexibility required to develop a cost-effective lower completion deployment methodology both from a challenging make up in the well due to a restrictive lubricator length to the tractor conveyancing in the well to land out at the desired set depth covering the producing zone. The paper will overview the success of multi-service and product supply co-operation adopting technology enablers to challenge ‘Industry Rules of Thumb’ replaced by rigless reasoning as a standard well intervention downhole sand control solution where Medco E&P Natuna Ltd. (Medco E&P) faces sand control challenges in their high deviation, sidetracked well stock. The paper draws final attention to the hydrocarbon performance gain resulting due to the ability for choke free production to allow drawing down the well at higher rates than initially expected from this zone.

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