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The optimum drilling technique in the northeast area of Sichuan
Han Laiju,Ma Guangjun,Zhao Jinhai
Strategic Study of CAE 2010, Volume 12, Issue 10, Pages 44-49
Geological conditions in northeast area of Sichuan are complicated, such as poor drillability in terrestrial formation, severe deviation in high angle structural belt. Pressure system and strata lithology in this area is also complicated, which causes many complex cases and accidents like lost circulation and collapse when drilling. Besides these, this area have "high pressure, high production, high sourness" features. ROP was slow and drilling cycle was long. In order to increase ROP of complicated deepwell in south China, through introducing and developing new technology and new tools, like gas drilling and vertical drilling equipments, combined with existing techniques such as underbalanced drilling, compound drilling, optimum drilling technique system fit for complicated deepwell in northeast area of Sichuan was formed, which improved ROP and wellbore quality of complicated deepwell in south China.
Keywords: northeast area of Sichuan optimum drilling gas drilling vertical drilling MPD with lower-density
WANG Jianjun, YANG Xingtuan, JIANG Shengyao
Frontiers in Energy 2008, Volume 2, Issue 2, Pages 169-173 doi: 10.1007/s11708-008-0044-z
Keywords: HRTL-5 experiment circulation simulation thermal
Dynamic fate modeling of γ-hexachlorocyclohexane in the lower reaches of the Liao River
LIU Zhenyu, YANG Fenglin, QUAN Xie, ZHANG Xiaohong
Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 2, Pages 166-171 doi: 10.1007/s11783-007-0029-x
Keywords: coefficient POPs temperature sediment increase dependent
Does financial development lower energy intensity?
Philip Kofi ADOM, Michael Owusu APPIAH, Mawunyo Prosper AGRADI
Frontiers in Energy 2020, Volume 14, Issue 3, Pages 620-634 doi: 10.1007/s11708-019-0619-x
Keywords: financial development energy intensity energy efficiency Ghana
Frontiers of Structural and Civil Engineering doi: 10.1007/s11709-023-0035-5
Natural ecological water demand in the lower Heihe River
FU Xinfeng, HE Hongmou, JIANG Xiaohui, WANG Guoqing, YANG Shengtian
Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 1, Pages 63-68 doi: 10.1007/s11783-008-0022-z
Sensor-guided gait-synchronization lower-extremity-exoskeleton for potential application on unilateral Research Articles
Donghai WANG
Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 6, Pages 920-936 doi: 10.1631/FITEE.2000465
This paper presents a gait-synchronization system to help potential unilateral knee-injured people walk normally with a ed (LEE). This relieves the body weight loading on the knee-injured leg and synchronizes its motion with that of the healthy leg during the swing phase of walking. The gait-synchronization system is integrated with a designed to sense the motion/gait of the healthy leg. Guided by the measured joint-angle trajectories, the motorized hip joint lifts the links during walking and synchronizes the knee-injured gait with the healthy gait by a half-cycle delay. The effectiveness of the LEE is illustrated experimentally. We compare the measured joint-angle trajectories between the healthy and knee-injured legs, the simulated knee forces, and the human-exoskeleton interaction forces. The results indicate that the motorized hip-controlled LEE can synchronize the motion/gait of the combined body-ed LEE and injured leg with that of the healthy leg.
Keywords: Sensor-guided Lower-extremity-exoskeleton Body sensor network Gait synchronization Weight-support
Mantu MAJUMDER, Debarghya CHAKRABORTY
Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2, Pages 537-551 doi: 10.1007/s11709-021-0708-x
Keywords: bearing capacity uplift capacity under-reamed pile clay limit analysis
Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1399-1
• With the same charge, current density had little effect on As(III)
Keywords: Electrocoagulation Air cathode Arsenic Current density Energy consumption
Shilin DENG MD ,
Frontiers of Medicine 2009, Volume 3, Issue 3, Pages 323-329 doi: 10.1007/s11684-009-0061-2
Keywords: early postmenopausal women bone mineral density exercise effects
density measurement for plastic injection molding via ultrasonic technology
Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0714-2
Keywords: ultrasonic measurement melt density in-situ measurement injection molding
Effect of undercut on the lower bound stability of vertical rock escarpment using finite element and
Shuvankar DAS; Debarghya CHAKRABORTY
Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 8, Pages 1040-1055 doi: 10.1007/s11709-022-0841-1
Keywords: undercut vertical escarpment stability Hoek-Brown yield criterion PCP
Diverting Seawater to Scour the Estuary and to Regulate the Lower Yellow River
Lin Bingnan,Zhou Jianjun,Zhang Ren
Strategic Study of CAE 2000, Volume 2, Issue 4, Pages 25-33
Since 1972, the Lower Yellow River has experienced a dry spell and has dried up from time to
Turbid seawater being of greater specific weight than the clear seawater would form densitytaken as the effective location of the river mouth where the longitudinal equilibrium profile of the LowerThis equilibrium profile would be lower than the original one by 4~12 m, depending on the estimated values
Keywords: diverting seawater scouring the Lower Yellow River above-the-ground river water resources
Yihui ZHOU, Meng XUE, Zhongyi YANG, Yulian GONG, Jiangang YUAN, Chunyan ZHOU, Baifei HUANG
Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 2, Pages 219-230 doi: 10.1007/s11783-012-0469-9
Keywords: Amaranth Cadmium (Cd) Cd accumulation pollution-safe cultivar (PSC) Cd chemical forms health risk
JIANG Yuan, TIAN Xuehong, YUAN Jie, JIN Yuemei, TAN Yusong
Frontiers of Medicine 2007, Volume 1, Issue 4, Pages 398-400 doi: 10.1007/s11684-007-0077-4
Keywords: anticarcinogenic microvessel density malignant potency muscle uterine leiomyosarcoma
Title Author Date Type Operation
The optimum drilling technique in the northeast area of Sichuan
Han Laiju,Ma Guangjun,Zhao Jinhai
Journal Article
Simulation of flow excursion and thermal siphon under natural circulation condition with lower pressureand lower quality
WANG Jianjun, YANG Xingtuan, JIANG Shengyao
Journal Article
Dynamic fate modeling of γ-hexachlorocyclohexane in the lower reaches of the Liao River
LIU Zhenyu, YANG Fenglin, QUAN Xie, ZHANG Xiaohong
Journal Article
Does financial development lower energy intensity?
Philip Kofi ADOM, Michael Owusu APPIAH, Mawunyo Prosper AGRADI
Journal Article
Correction to: Effect of undercut on the lower bound stability of vertical rock escarpment using finite
Journal Article
Natural ecological water demand in the lower Heihe River
FU Xinfeng, HE Hongmou, JIANG Xiaohui, WANG Guoqing, YANG Shengtian
Journal Article
Sensor-guided gait-synchronization lower-extremity-exoskeleton for potential application on unilateral
Donghai WANG
Journal Article
Bearing and uplift capacities of under-reamed piles in soft clay underlaid by stiff clay using lower-bound
Mantu MAJUMDER, Debarghya CHAKRABORTY
Journal Article
Effect of current density on groundwater arsenite removal performance using air cathode electrocoagulation
Journal Article
Effects of exercise therapy on bone mineral density in early postmenopausal women: a controlled trial
Shilin DENG MD ,
Journal Article
Effect of undercut on the lower bound stability of vertical rock escarpment using finite element and
Shuvankar DAS; Debarghya CHAKRABORTY
Journal Article
Diverting Seawater to Scour the Estuary and to Regulate the Lower Yellow River
Lin Bingnan,Zhou Jianjun,Zhang Ren
Journal Article
High cadmium pollution risk on vegetable amaranth and a selection for pollution-safe cultivars to lower
Yihui ZHOU, Meng XUE, Zhongyi YANG, Yulian GONG, Jiangang YUAN, Chunyan ZHOU, Baifei HUANG
Journal Article