|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | The partial pressure of carbon dioxide and air-sea fluxes in the Changjiang River Estuary and adjacent Hangzhou Bay显示文摘The distributions of partial pressure of carbon dioxide (p CO2 ) in the surface waters of the Changjiang River Estuary and adjacent Hangzhou Bay were examined in the summer of 2010. Surface water p CO2 ranged from 751-2 095 μatm (1 atm=101 325 Pa) in the inner estuary, 177-1 036 μatm in the outer estuary, and 498-1 166 μatm in Hangzhou Bay. Overall, surface p CO2 behaved conservatively during the estuary mixing. In the inner estuary, surface p CO2 was relatively high due to urbanized pollution and a high respiration rate. The lowest p CO2 was observed in the outer estuary, which was apparently induced by a phytoplankton bloom because the dissolved oxygen and chlorophyll a were very high. The Changjiang River Estuary was a significant source of atmospheric CO2 and the degassing fluxes were estimated as 0-230 mmol/(m2 d) [61 mmol/(m2 d) on average] in the inner estuary. In contrast, the outer estuary acted as a CO2 sink. | YU Peisong ZHANG Haisheng ZHENG Minhui PAN Jianming BAI Yan | 2013 | Acta Oceanologica Sinica2013，32，6： | 8 |
| 2 | Effects of heating rate on the alloy element partitioning and mechanical properties in equiaxedα+βTi-6Al-4V alloy显示文摘The effects of heating rate on the alloy element partitioning and mechanical properties during the phase transformation ofα→βin Ti-6Al-4 V alloy under solution treatment have been investigated by the experiments and phase field simulations,which reveal the evolutions of microstructure and compositions at the non-equilibrium state and well verify the experimental results.The specific results indicate that the compositions measured through electron probe micro-analysis(EPMA)under a lower heating rate are close to the equilibrium ones corresponding to the solution temperature.Heating up to the target solution temperature,as the heating rate increases,the Al content decreases and V increases in the primaryα(α_(p))grain with a larger size,the volume fraction ofα_(p)increases and the composition gradient betweenα_(p)andβphases gets steeper.The interrelated relationship among the diffusion,compositions,solution temperature and free energy of the system has been discussed in detail.Moreover,increasing the heating rate(~20.0 K/min)may help to improve the mechanical properties of the alloy by mainly adjusting theα_(p)/β;volume fractions,α_(p)particle size and secondaryα(α_(p))size during the process of heating up to the solution temperature.These results may shed some light on the optimization of the knowledge-based heat treatment route. | Jinhu Zhang Hongtao Ju Haisheng Xu Liang Yang Zhichao Meng Chen Liu Ping Sun Jianke Qiu Chunguang Bai Dongsheng Xu Rui Yang | 2021 | Journal of Materials Science & Technology2021，，35： | 2 |
| 3 | Positive solutions for boundary value problem of nonlinear fractional differential equation显示文摘 | Bai Zhanbing Lu Haisheng | 2005 | Journal of Mathematical Analysis and Applications2005，311，： | 1 |
| 4 | Mixed convective heat transfer characteristics and mechanisms in structured packed beds显示文摘The structured packed bed is considered a promising reactor owing to its low pressure drop and good heat transfer performance.In the heat transfer process of thermal storage in packed beds,natural convection plays an important role.To obtain the mixed convective heat transfer characteristics and mechanisms in packed beds,numerical simulations and coupling analyses were carried out in this study on the unsteady process of fluid flow and heat transfer.A three-dimensional model of the flow channel in the packed bed was established,and the Navier–Stokes equations and Laminar model were adopted for the computations.The effects of the driving force on fluid flow around a particle were studied in detail.The differences in velocity and density distributions under different flow directions due to effect of the aiding flow or opposing flow were intuitively demonstrated and quantitatively analyzed.It was found that the driving force strengthens the fluid flow near the particle surface when aiding flow occurs and inhibits the fluid flow when opposing flow occurs.The boundary layer structure was changed by the natural convection,which in turn influences the field synergy angle.For the aiding flow,the coordination between the velocity and density fields is higher than that for the opposing flow.By analysis the effects of physical parameters on mixed convective heat transfer,it is indicated that with an increase in the fluid-solid temperature difference or the particle diameter,or a decrease in the fluid temperature,the strengthening or inhibiting effect of natural convection on the heat transfer became more significant. | Yuelong Qu Liang Wang Xipeng Lin Haisheng Chen Shuang Zhang Haoshu Ling Yakai Bai | 2023 | Particuology2023，，11： | 0 |
| 5 | Tracking and grasping of moving target based on accelerated geometric particle filter on colored image显示文摘Visual tracking and grasping of moving object is a challenging task in the field of robotic manipulation,which also has great potential in applications such as human-robot collaboration.Based on the particle filtering framework and position-based visual servoing,this paper proposes a new method for visual tracking and grasping of randomly moving objects.A geometric particle filter tracker is established for visual tracking.In order to deal with the tracking efficiency issue for particle filter,edge detection and morphological dilation are employed to reduce the computation burden of geometric particle filtering.Meanwhile,the HSV image feature is employed instead of the grayscale feature to improve the tracking algorithm’s robustness to illumination change.A grasping strategy combining tracking and interception is adopted along with the position-based visual servoing(PBVS)method to achieve stable grasp of the target.Comprehensive comparisons on open source dataset and a large number of experiments on real robot system are conducted,which demonstrate the proposed method has competitive performance in random moving object tracking and grasping. | GONG ZeYu QIU ChunRong TAO Bo BAI HaiSheng YIN ZhouPing DING Han | 2021 | Science China(Technological Sciences)2021，64，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员