scholarly journals Dynamic Planning Method for Drug Distribution in Earthquake Response Based on Sliding Time Window Series

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 160697-160710
Author(s):  
Jiaqi Fang ◽  
Hanping Hou ◽  
Lingle Pan ◽  
Qingshan Deng ◽  
Haiyun Pang ◽  
...  
Keyword(s):  
Time Window ◽  
Drug Distribution ◽  
Planning Method ◽  
Earthquake Response ◽  
Dynamic Planning

Research on Dynamic Planning Method of Collision Avoidance Route Based on Ship Kinematics

2021 ◽  
Author(s):  
Lipeng Wang ◽  
Chenkun Zhou ◽  
Zhi Zhang ◽  
Shan Ma ◽  
Wenlong Ma
Keyword(s):  
Collision Avoidance ◽  
Planning Method ◽  
Dynamic Planning

A segmented attitude planning and controlling method for agile satellite based on Pseudospectral method

2016 ◽  
Vol 40 (4) ◽  
pp. 1188-1200
Author(s):  
Lin Zhao ◽  
Xiaowen Wu ◽  
Yuan Liu ◽  
Yong Hao
Keyword(s):  
Angular Velocity ◽  
High Precision ◽  
Time Window ◽  
Pseudospectral Method ◽  
State Equation ◽  
Constant Angular Velocity ◽  
Planning Method ◽  
State Variables ◽  
Agile Satellite ◽  
Imaging Mode

To fulfil the high precision requirements of the manoeuvre imaging mode of an agile satellite and solve the shortcomings of existing methods, a segmented attitude planning method based on the Pseudospectral method is proposed. First, a state equation was built by integrating the attitude constraint, time window and other restrictions. Furthermore, to guarantee the accuracy and stability of objects, a segmented strategy of an attitude trajectory approaching the imaging target using a constant angular velocity was proposed. The segmented time, three-axis position and velocity were also determined. Second, taking the global performance into account, the first section of the attitude trajectory was planned by the Legendre Pseudospectral method in order to acquire the optimal state variables and control variables. The second section of the attitude trajectory was then obtained by the constant angular velocity planning method. Next, in order to track the planning trajectory efficiently, a PD controller was designed that was suitable for a segmented planning method. High precision control parameters were obtained by the optimized method. Finally, numerical simulation results show that the proposed segmented attitude planning method successfully meets the high precision requirements of the manoeuvre imaging mode, and the feasibility and effectiveness of this method is verified.

scholarly journals A SATELLITE IMAGING MISSION PLANNING METHOD FOR FAST ANTARCTICA COVERAGE

2020 ◽  
Vol V-4-2020 ◽  
pp. 217-222
Author(s):  
Y. Chen ◽  
X. Shen ◽  
G. Zhang ◽  
T. Liu ◽  
Z. Lu ◽  
...  
Keyword(s):  
Time Window ◽  
Time Windows ◽  
Ice Sheet ◽  
Planning Method ◽  
Mission Planning ◽  
Multi Objective Optimization ◽  
Antarctic Ice Sheet ◽  
Satellite Imaging ◽  
Multi Objective ◽  
Imaging Time

Abstract. Global warming has become one of the most prominent global issues, and Antarctic ice sheet is one of the indicator of global climate change. Satellite imagery has become an important means of monitoring the changes in Antarctic ice sheet. Due to the high overlap of satellite imaging swaths, the existing Antarctica images have the disadvantages of long period of imagery acquisition, large temporal difference among the mosaic images, and low utilization of satellite resource. This paper proposes a satellite imaging mission planning method for fast Antarctica coverage. First, the imaging time window is forecasted within the specified imaging time range to obtain all the visible time windows of the imaging satellite to Antarctica. Then, taking the selection of each time window and the satellite swing angle in each time window as decision variables, and the satellite attitude maneuver ability as constraint, an imaging mission model including two objective functions with minimum number of imaging time windows and the maximum coverage rate is established. To solving the proposed multi-objective optimization model, an improved real-binary hybrid LMOCSO (large-scale multi-objective optimization based on a competitive swarm optimizer) is proposed in this paper. Finally, a simulation experiment was performed using Gaofen-3 satellite to verify the effectiveness of the proposed method.

Cytopathology of Cardiac Tissue from Daunomycin-Treated Mice

1971 ◽  
Vol 29 ◽  
pp. 550-551
Author(s):  
Robert H. Liss ◽  
Frances A. Cotton
Keyword(s):  
Cardiac Tissue ◽  
Cardiac Toxicity ◽  
Drug Distribution ◽  
Personal Communication ◽  
Intravenous Dose ◽  
Single Intravenous Dose ◽  
Physiologic Saline ◽  
Histopathologic Changes ◽  
Distribution Studies ◽  
Lung And Kidney

Daunomycin, an antibiotic used in the clinical management of acute leukemia, produces a delayed, lethal cardiac toxicity. The lethality is dose and schedule dependent; histopathologic changes induced by the drug have been described in heart, lung, and kidney from hamsters in both single and multiple dose studies. Mice given a single intravenous dose of daunomycin (10 mg/kg) die 6-7 days later. Drug distribution studies indicate that the rodents excrete most of a single dose of the drug as daunomycin and metabolite within 48 hours after dosage (M. A. Asbell, personal communication).Myocardium from the ventricles of 6 moribund BDF1 mice which had received a single intravenous dose of daunomycin (10 mg/kg), and from controls dosed with physiologic saline, was fixed in glutaraldehyde and prepared for electron microscopy.

Sign in / Sign up

Export Citation Format

Share Document