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  • Open Access


    Simulation of Real‐Time Path Planning for Large‐Scale Transportation Network Using Parallel Computation

    Jiping Liua,b, Xiaochen Kanga,*, Chun Donga, Fuhao Zhanga

    Intelligent Automation & Soft Computing, Vol.25, No.1, pp. 65-77, 2019, DOI:10.31209/2018.100000013

    Abstract To guarantee both the efficiency and accuracy of the transportation system, the real-time status should be analyzed to provide a reasonable plan for the near future. This paper proposes a model for simulating the real-world transportation networks by representing the irregular road networks with static and dynamic attributes, and the vehicles as moving agents constrained by the road networks. The all pairs shortest paths (APSP) for the networks are calculated in a real-time manner, and the ever-changing paths can be used for navigating the moving vehicles with real-time positioning devices. In addition, parallel computation is used to accelerate the shortest… More >

  • Open Access


    Too little too late? Communication with patients with congenital heart disease about challenges of adult life

    Lisa X. Deng1, Lacey P. Gleason2, Katherine Awh2, Abigail May Khan3, David Drajpuch2,4, Stephanie Fuller5, Leah A. Goldberg2, Christopher E. Mascio5, Sara L. Partington2,4, Lynda Tobin2,4, Adrienne H. Kovacs3, Yuli Y. Kim2,4

    Congenital Heart Disease, Vol.14, No.4, pp. 534-540, 2019, DOI:10.1111/chd.12778

    Abstract Objective: To investigate the experiences and communication preferences of adult patients with congenital heart disease (CHD) in the domains of employment, insur‐ ance, and family planning.
    Design: Patients ≥ 18 years of age completed a questionnaire about experiences and communication preferences regarding employment, health insurance, and family planning.
    Results: Of 152 patients (median age = 33 years, 50% female, 35% with CHD of great complexity), one in four reported work‐related problems due to CHD and a quar‐ ter also recalled a previous gap in health insurance. Of females, 29% experienced an unplanned pregnancy. The median importance of discussion ratings (on… More >

  • Open Access


    Hospital resource utilization and presence of advance directives at the end of life for adults with congenital heart disease

    Jill M. Steiner1, James N. Kirkpatrick1, Susan R. Heckbert2, James Sibley3, James A. Fausto3, Ruth A. Engelberg3, J. Randall Curtis3

    Congenital Heart Disease, Vol.13, No.5, pp. 721-727, 2018, DOI:10.1111/chd.12638

    Abstract Objective: Overall health care resource utilization by adults with congenital heart disease has increased dramatically in the past two decades, yet little is known about utilization patterns at the end of life. The objective of this study is to better under‐ stand the patterns and influences on end‐of‐life care intensity for adults with con‐ genital heart disease.
    Methods: We identified a sample of adults with congenital heart disease (n = 65), cancer (n = 10 784), or heart failure (n = 3809) who died between January 2010 and December 2015, cared for in one multi‐hospital health care system. We used… More >

  • Open Access


    Improving outpatient advance care planning for adults with congenital or pediatric heart disease followed in a pediatric heart failure and transplant clinic

    Lindsay A. Edwards1,2, Christine Bui2,3, Antonio G. Cabrera1,2, Jill Ann Jarrell2,4,5

    Congenital Heart Disease, Vol.13, No.3, pp. 362-368, 2018, DOI:10.1111/chd.12579

    Abstract Objective: To improve outpatient advanced care planning (ACP) for adults with congenital/pediatric heart disease followed in a pediatric heart failure (HF) and transplant clinic through quality improvement (QI) methodology.
    Design: A one-year QI project was completed. We conducted quarterly chart reviews and incorporated feedback from the providers to direct subsequent interventions.
    Patients and Setting: Patients ≥18 years of age seen in the HF and Transplant Clinic for followup visit were included in analysis.
    Interventions: Interventions focused on five main areas: identifying and training providers to have ACP discussions, standardizing the ACP discussion, standardizing ACP and advance directive (AD) documentation in… More >

  • Open Access


    Perspectives on advance care planning and palliative care among adults with congenital heart disease

    Jill M. Steiner1, Karen Stout1, Laurie Soine1, James N. Kirkpatrick1, J. Randall Curtis2

    Congenital Heart Disease, Vol.14, No.3, pp. 403-409, 2019, DOI:10.1111/chd.12735

    Abstract Background: Patients with adult congenital heart disease (ACHD) report that ad‐ vance care planning (ACP) is important, and that they want information about prog‐ nosis. However, recognizing importance and being willing to participate are different constructs, and how and when to begin ACP and palliative care discussions remains ill‐defined.
    Methods: We conducted a cross‐sectional survey of 150 consecutive outpatients to assess willingness to participate in ACP, with whom, and important barriers and facili‐ tators to these discussions.
    Results: The majority of participants (69%) reported being willing to participate in ACP; 79% to have a meeting to discuss goals and care… More >

  • Open Access


    Agile Satellite Mission Planning via Task Clustering and Double-Layer Tabu Algorithm

    Yanbin Zhao1, *, Bin Du2, Shuang Li2

    CMES-Computer Modeling in Engineering & Sciences, Vol.122, No.1, pp. 235-257, 2020, DOI:10.32604/cmes.2020.08070

    Abstract Satellite observation schedule is investigated in this paper. A mission planning algorithm of task clustering is proposed to improve the observation efficiency of agile satellite. The newly developed method can make the satellite observe more targets and therefore save observation resources. First, for the densely distributed target points, a pre-processing scheme based on task clustering is proposed. The target points are clustered according to the distance condition. Second, the local observation path is generated by Tabu algorithm in the inner layer of cluster regions. Third, considering the scatter and cluster sets, the global observation path is obtained by adopting Tabu… More >

  • Open Access


    Virtual Implantation of Stent-graft by Finite Element Simulation and Its Applications in Endovascular Treatment Planning for B Type Aortic Dissection

    Zhuanyuan Meng1, Tao Ma2, Zhihui Dong2, Shengzhang Wang1,*, Weiguo Fu2

    Molecular & Cellular Biomechanics, Vol.16, Suppl.2, pp. 60-60, 2019, DOI:10.32604/mcb.2019.07253

    Abstract Thoracic endovascular aortic repair has been widely applied to treat Stanford Type B aortic dissection. However, retrograde type A dissection can occur as a complication after thoracic endovascular repair for Stanford type B aortic dissection. In order to investigated the possible mechanical reasons of the new entry occurring when stent grafts were implanted into the true lumen of one type B aortic dissection, a framework of virtual implantation of stent-graft by using finite element simulations was developed in this paper. The animal experiments were adopted to verify the finite element simulation of stent-graft implantation. Moreover, the manufactured stent-grafts were implanted… More >

  • Open Access


    Patient-Specific Computational Approach for Trans Catheter Aortic Valve Replacement (TAVR): Pre-Procedural Planning for Enhancing Performance and Clinical Outcomes

    Ram P. Ghosh1, Matteo Bianchi1, Gil Marom2, Oren M. Rotman1, Brandon Kovarovic1, Danny Bluestein1,*

    Molecular & Cellular Biomechanics, Vol.16, Suppl.2, pp. 12-14, 2019, DOI:10.32604/mcb.2019.07379

    Abstract This article has no abstract. More >

  • Open Access


    Trajectory Planning of High Precision Collaborative Robots

    Tuanjie Li1,*, Yan Zhang1, Jiaxing Zhou1

    CMES-Computer Modeling in Engineering & Sciences, Vol.118, No.3, pp. 583-598, 2019, DOI:10.31614/cmes.2018.04891

    Abstract In order to satisfy the high efficiency and high precision of collaborative robots, this work presents a novel trajectory planning method. First, in Cartesian space, a novel velocity look-ahead control algorithm and a cubic polynomial are combined to construct the end-effector trajectory of robots. Then, the joint trajectories can be obtained through the inverse kinematics. In order to improve the smoothness and stability in joint space, the joint trajectories are further adjusted based on the velocity look-ahead control algorithm and quintic B-spline. Finally, the proposed trajectory planning method is tested on a 4-DOF serial collaborative robot. The experimental results indicate… More >

  • Open Access


    A Trajectory Planning-Based Energy-Optimal Method for an EMVT System

    Jiayu Lu1, Siqin Chang1,*

    CMES-Computer Modeling in Engineering & Sciences, Vol.118, No.1, pp. 91-109, 2019, DOI:10.31614/cmes.2019.04190

    Abstract In this paper, a trajectory planning-based energy-optimal method is proposed to reduce the energy consumption of novel electromagnetic valve train (EMVT). Firstly, an EMVT optimization model based on state equation was established. Then, the Gauss pseudospectral method (GPM) was used to plan energy-optimal trajectory. And a robust feedforward-feedback tracking controller based on inverse system method is proposed to track the energy-optimal trajectory. In order to verify the effectiveness of the energy-optimal trajectory, a test bench was established. Finally, co-simulations based on MATLAB Simulink and AVL Boost were carried out to illustrate the effect of energy-optimal trajectories on engine performance. Experimental… More >

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