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Artykuły w czasopismach na temat „Minimum-time Guidance”

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Data publikacji: 6 września 2023

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1

Yamaoka, Seiji. "Minimum-Time Guidance and Control Law for High Maneuvering Missile." International Journal of Aeronautical and Space Sciences 10, no. 1 (2009): 46–58. http://dx.doi.org/10.5139/ijass.2009.10.1.046.

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UENO, Seiya. "Minimum-Time Turns of Aircraft by Feedback Guidance and Control Law." Journal of the Japan Society for Aeronautical and Space Sciences 45, no. 516 (1997): 29–35. http://dx.doi.org/10.2322/jjsass1969.45.29.

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Indig, Nahshon, Joseph Z. Ben-Asher, and Erez Sigal. "Near-Optimal Minimum-Time Guidance Under Spatial Angular Constraint in Atmospheric Flight." Journal of Guidance, Control, and Dynamics 39, no. 7 (2016): 1563–77. http://dx.doi.org/10.2514/1.g001485.

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Ariba, Yassine, Denis Arzelier, and Laura Sofia Urbina-Iglesias. "Minimum-Fuel Fixed-Time Impulsive Elliptic Glide-Slope Guidance Algorithms Using Semidefinite Programming." Journal of Guidance, Control, and Dynamics 41, no. 9 (2018): 1873–87. http://dx.doi.org/10.2514/1.g003395.

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Alamir, Mazen. "Nonlinear receding horizon sub-optimal guidance law for the minimum interception time problem." Control Engineering Practice 9, no. 1 (2001): 107–16. http://dx.doi.org/10.1016/s0967-0661(00)00085-x.

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6

Zhou, Guanqun, and Qunli Xia. "A Guidance Strategy for Strapdown Seeker considering Minimum Field-of-View Angle Constraint." International Journal of Aerospace Engineering 2020 (June 19, 2020): 1–11. http://dx.doi.org/10.1155/2020/5247257.

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An off-axis strapdown seeker in missile may lead to a minimum field-of-view (FOV) angle constraint problem. The goal of this paper is to deal with the problem in guidance. Analysis of kinematics proves that on the premise of attacking stationary target, seeker look angle comes to 0 before or at the end time, and seeker will lose target finally. In order to reduce the distance of seeker losing target, a guidance strategy is proposed to sustain minimum FOV angle constraint during flight. The strategy can be applied on guidance laws with independent orders in longitudinal and lateral channels. By

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7

Wu, Zhenglong, Zhenyu Guan, Chengwei Yang, and Jie Li. "Terminal Guidance Law for UAV Based on Receding Horizon Control Strategy." Complexity 2017 (2017): 1–19. http://dx.doi.org/10.1155/2017/2750172.

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Terminal guidance law against the maneuvering target is always the focal point. Most of the literatures focus on estimating the acceleration of target and time to go in guidance law, which are difficult to acquire. This paper presents a terminal guidance law based on receding horizon control strategy. The proposed guidance law adopts the basic framework of receding horizon control, and the guidance process is divided into several finite time horizons. Then, optimal control theory and target motion prediction model are used to derive guidance law for minimum time index function with continuous

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8

Ariba, Yassine, Denis Arzelier, and Laura Sofia Urbina. "A New Glideslope Guidance Algorithm for Minimum-Fuel Fixed-Time Elliptic Rendezvous Using Semidefinite Programming." IFAC-PapersOnLine 50, no. 1 (2017): 7235–40. http://dx.doi.org/10.1016/j.ifacol.2017.08.1369.

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Kim, Kangsoo, and Tamaki Ura. "Applied Model-Based Analysis and Synthesis for the Dynamics, Guidance, and Control of an Autonomous Undersea Vehicle." Mathematical Problems in Engineering 2010 (2010): 1–23. http://dx.doi.org/10.1155/2010/149385.

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Model-based analysis and synthesis applied to the dynamics, guidance, and control of an autonomous undersea vehicle are presented. As the dynamic model for describing vehicle motion mathematically, the equations of motion are derived. The stability derivatives in the equations of motion are determined by a simulation-based technique using computational fluid dynamics analysis. The dynamic model is applied to the design of the low-level control systems, offering model-based synthetic approach in dynamics and control applications. As an intelligent navigational strategy for undersea vehicles, we

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10

Li, Bin, Defu Lin, Jiang Wang, and Song Tian. "Guidance law to control impact angle and time based on optimality of error dynamics." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, no. 10 (2018): 3577–88. http://dx.doi.org/10.1177/0954410018801226.

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In this work, a new guidance law with a meaningful performance index is designed to satisfy terminal impact angle and impact time constraints based on optimal error dynamics, which can be used for salvo attacks or cooperative missions of multi-missile. The analytical solution of the proposed guidance law is a combination of trajectory shaping guidance law and an additional impact time error feedback term that is proportional to the difference between the desired and the true impact times. Trajectory shaping guidance law aims to achieve the desired terminal impact angle and zero miss distance,

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11

Fu, Lei, Min Xu, Xiao Min An, and Xun Liang Yan. "Design and Optimization of Low-Thrust Orbit Transfers Using Hybrid Method." Advanced Materials Research 588-589 (November 2012): 335–39. http://dx.doi.org/10.4028/www.scientific.net/amr.588-589.335.

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A low-thrust guidance scheme, which is weighted combined by taking the optimum strategy of thrust allocation and the target deficits value into consideration for each orbital element, is developed. The presented guidance scheme is predictive in nature and does not rely on a stored reference trajectory or reference controls. The orbit transfer problem is converted into parametric optimization and utilizing a hybrid genetic algorithm. The minimum-time orbit transfer is considered. The influence of the Earth’s oblateness is taken into consideration in the simulation of minimum-time. A conclusion

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12

Du, Wenhao, Wanchun Chen, Liang Yang, and Hao Zhou. "Optimal Midcourse Guidance Algorithm for Exoatmospheric Interception Using Analytical Gradients." International Journal of Aerospace Engineering 2019 (September 16, 2019): 1–17. http://dx.doi.org/10.1155/2019/8502870.

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This paper is aimed at providing a semianalytical method to solve the optimal exoatmospheric interception problem with the minimum fuel consumption. A nonlinear programming (NLP) problem with the minimum velocity increment, which involves Lambert’s problem with unspecified time-of-flight, is firstly formulated. Then, a set of Karush-Kuhn-Tucker conditions and the Jacobian matrix corresponding to those conditions are derived in an analytical manner, even though the derivatives are mathematically complicated and computationally onerous. Therefore, the Newton-Raphson method can be used to efficie

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13

Mu, Dongdong, Guofeng Wang, Yunsheng Fan, Yiming Bai, and Yongsheng Zhao. "Fuzzy-Based Optimal Adaptive Line-of-Sight Path Following for Underactuated Unmanned Surface Vehicle with Uncertainties and Time-Varying Disturbances." Mathematical Problems in Engineering 2018 (2018): 1–12. http://dx.doi.org/10.1155/2018/7512606.

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This paper investigates the path following control problem for an underactuated unmanned surface vehicle (USV) in the presence of dynamical uncertainties and time-varying external disturbances. Based on fuzzy optimization algorithm, an improved adaptive line-of-sight (ALOS) guidance law is proposed, which is suitable for straight-line and curve paths. On the basis of guidance information provided by LOS, a three-degree-of-freedom (DOF) dynamic model of an underactuated USV has been used to design a practical path following controller. The controller is designed by combining backstepping method

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14

Kumar, G. Naresh, AK Sarkar, and SE Talole. "Dynamic pressure based mid-course guidance scheme for hypersonic boost-glide vehicle." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, no. 9 (2018): 3211–22. http://dx.doi.org/10.1177/0954410018795265.

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In this study, a guidance scheme for an aerodynamically controlled hypersonic boost-glide class of flight vehicle is proposed. In this work, optimum glide dynamic pressure corresponding to maximum L/ D throughout the flight is calculated and a mid-course guidance law formulation to track the dynamic pressure while suppressing phugoid oscillations is proposed for real-time flight trajectory shaping. Efficacy of the proposed guidance scheme has been demonstrated through simulation studies. Robustness analysis on the proposed guidance algorithm is carried out using Monte Carlo technique. Lastly,

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15

Sang, D.-K., and M.-J. Tahk. "Guidance law switching logic considering the seeker's field-of-view limits." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 223, no. 8 (2009): 1049–58. http://dx.doi.org/10.1243/09544100jaero614.

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The impact time control guidance (ITCG) method, which has been proposed recently, can be applied successfully to a salvo attack of multiple missiles. Compared to the proportional navigation guidance law, this guidance method makes additional manoeuvres to synchronize the impact times. However, such manoeuvres do not consider the manoeuvrability and the seeker's field-of-view (FOV) of a missile and may cause the target to move out of the missile seeker's FOV; maintaining the seeker lock-on condition during the engagement is critical for missile guidance. To solve this problem, two methods are p

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16

Wang, Xin, and Xue Qiu. "Study on Fuzzy Neural Sliding Mode Guidance Law with Terminal Angle Constraint for Maneuvering Target." Mathematical Problems in Engineering 2020 (August 24, 2020): 1–12. http://dx.doi.org/10.1155/2020/4597937.

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Aiming at the requirement that the guidance law should meet the minimum miss distance and the desired terminal angle at the same time, a sliding mode variable structure control method is introduced. In order to improve the fuzzy variable structure guidance law for maneuvering target attack effect, a neural network to the optimization design is carried out on the guidance law. The neural network is trained by the samples, which is under the condition of different error coefficient of angle, the coefficient of reaching law, and the coefficient of on-off item about target. Fuzzy neural sliding mo

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17

Sun, Zuwen, and Natalie Baddour. "On the Time Frequency Compactness of the Slepian Basis of Order Zero for Engineering Applications." Computation 11, no. 6 (2023): 116. http://dx.doi.org/10.3390/computation11060116.

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Time and frequency concentrations of waveforms are often of interest in engineering applications. The Slepian basis of order zero is an index-limited (finite) vector that is known to be optimally concentrated in the frequency domain. This paper proposes a method of mapping the index-limited Slepian basis to a discrete-time vector, hence obtaining a time-limited, discrete-time Slepian basis that is optimally concentrated in frequency. The main result of this note is to demonstrate that the (discrete-time) Slepian basis achieves minimum time-bandwidth compactness under certain conditions. We dis

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18

Chen, Zhigang, Ying Wang, Mingwei Sun, Zenghui Wang, and Zengqiang Chen. "Practical Energy Dissipation Control of Near Space Glider on Independent Longitudinal Plane." International Journal of Aerospace Engineering 2020 (November 21, 2020): 1–22. http://dx.doi.org/10.1155/2020/8854837.

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The near-space hypersonic aerodynamic glider has strong maneuverability in wide flight envelope. The glide is generally achieved in a smooth manner with no or weak altitude oscillations in the altitude. The maximum lift-to-drag ratio glide is a typical trajectory that can approximate the maximum glide range, which is a crucial indicator for a glider. However, another important indicator, the minimum glide range, which is used in some time-sensitive missions and is expected to reduce the velocity to a specified threshold in a short longitudinal range, is difficult to be realized. In practice, t

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19

Samani, Mohammad, Mona Tafreshi, Iman Shafieenejad, and Amir Ali Nikkhah. "Minimum-time open-loop and closed-loop optimal guidance with GA-PSO and neural fuzzy for Samarai MAV flight." IEEE Aerospace and Electronic Systems Magazine 30, no. 5 (2015): 28–37. http://dx.doi.org/10.1109/maes.2015.7119822.

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20

Zuo, Xiaolong, Jun Bi, Yongxing Wang, and Yujia Du. "A Charging Guidance Optimization Model for Electric Vehicle Travel by Considering Multi-Dimensional Preferences of Users." World Electric Vehicle Journal 14, no. 7 (2023): 171. http://dx.doi.org/10.3390/wevj14070171.

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The dual-carbon strategy advocates a green, environmentally friendly, and low-carbon lifestyle. In the field of transportation, electric vehicles (EVs) have been regarded as an effective solution to reduce carbon emissions and to conserve energy. Developing a reasonable charging guidance scheme for users is a feasible way to solve problems, such as the range anxiety of EV users, and has a great application value for the promotion of EVs in the future. In practical situations, how to develop charging induction schemes for users that better meet their needs according to the type of user and thei

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21

Galel, Z., J. L. Hunt, and T. H. Unger. "Laser Guidance for Repairing Gas Turbine Parts." Journal of Engineering for Gas Turbines and Power 117, no. 3 (1995): 540–44. http://dx.doi.org/10.1115/1.2814128.

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As a result of normal operating conditions, jet engine parts tend to distort. During repair, many of these parts require some form of selective cutting. Due to the differences between each individual part, automation such as CNC machining becomes complex. The need to map each individual part prior to machining has prohibited repair facilities from introducing sophisticated automation. This paper presents for the first time a novel method that addresses many problems related to selective material removal in jet engine repairs. Similar to a terrain-following cruise missile, a laser-guided cutter

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22

Fox, Garey A., Lucie Guertault, Celso Castro-Bolinaga, and Alexis Swanson. "Guidance on Applied Pressure Heads for Quantifying Cohesive Soil Erodibility with a Jet Erosion Test (JET)." Journal of the ASABE 65, no. 6 (2022): 1443–50. http://dx.doi.org/10.13031/ja.14884.

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Highlights Jet erosion test (JET) is a commonly used instrument for quantifying soil erodibility. Uncertainty remains on an appropriate applied pressure head to ensure high-quality JET data. Numerical analysis was used to derive minimum and maximum heads for four soil classifications. Ideal applied pressure heads depend on soil erodibility parameters and user-selected JET characteristics. Abstract. The Jet Erosion Test (JET) is one of the few instruments available for measuring cohesive soil erodibility in situ, but uncertainty remains regarding an appropriate initial applied pressure head for

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23

Liu, Jing, Pengqiang Zheng, Yubao Zhan, Zhiguo Li, and Zhaoxia Shi. "Urban Regional Building Energy Planning Model under the Guidance of Network Flow Theory." Processes 11, no. 1 (2022): 8. http://dx.doi.org/10.3390/pr11010008.

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The satisfactory construction of regional building energy planning models is a key technology in effective energy allocation. At present, the selection of energy planning is only based on artificial judgment criteria, which leads to a high subjectivity in energy planning. This research innovatively introduces the network flow theory into the urban regional building energy planning model. Combined with the actual characteristics of regional building energy planning, the regional building energy planning model was constructed and the regional energy distribution mode was optimized. The model inc

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24

Antoniadis, I. "Guidance Preconditioning by an Impulse Sequence for Robust Residual Vibration Suppression." Shock and Vibration 6, no. 3 (1999): 133–45. http://dx.doi.org/10.1155/1999/250173.

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In order to suppress residual vibrations, a general method is presented for preconditioning any guidance function prior to its application to a dynamic system, by convolving it with a sequence of impulses. The approach includes first the development of the necessary design specifications for the impulse sequence, so that the robustness properties cover the widest possible variation of the system natural frequencies. Three solution methods are proposed then, with special emphasis in the achievement of the minimum possible duration time of the impulse sequence. Numerical experiments verify the e

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25

Williams, Edwin, and Yan Jin. "Dynamic Probability Fields for Risk Assessment and Guidance Solutions." Annual of Navigation 26, no. 1 (2019): 33–45. http://dx.doi.org/10.1515/aon-2019-0004.

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Abstract Standard Guidance, Navigation, and Control (GN&C) systems take state data from a navigation system and create a trajectory that minimizes some a-priori determined cost function. These cost functions are typically time, money, weight, or any general physically realizable quantity. Previous work has been done to show the effectiveness of using risk as the sole objective function. However, this previous work used Poisson distributions and historical estimates to achieve this goal. In this paper we present the situation-risk assessment (SRA) method contained within the intelligent sit

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26

FUKUMOTO, Hiroshi, and Seiya UENO. "A Method of Minimum-Time Formation Guidance Based on Optimal Solutions of Single Fixed-Wing Aircraft by using Homotopy Method." AEROSPACE TECHNOLOGY JAPAN, THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES 16 (2017): 109–14. http://dx.doi.org/10.2322/astj.jsass-d-17-00046.

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27

WAH, BENJAMIN W., and MINGLUN QIAN. "VIOLATION-GUIDED NEURAL-NETWORK LEARNING FOR CONSTRAINED FORMULATIONS IN TIME-SERIES PREDICTIONS." International Journal of Computational Intelligence and Applications 01, no. 04 (2001): 383–97. http://dx.doi.org/10.1142/s1469026801000317.

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Time-series predictions by artificial neural networks (ANNs) are traditionally formulated as unconstrained optimization problems. As an unconstrained formulation provides little guidance on search directions when a search gets stuck in a poor local minimum, we have proposed to use a constrained formulation in order to use constraint violations to provide additional guidance. In this paper, we formulate ANN learning with cross-validations for time-series predictions as a non-differentiable nonlinear constrained optimization problem. Based on our theory of Lagrange multipliers for discrete const

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28

BHOWMIK, S. K. ROY, SANKAR NATH, A. K. MITRA, and H. R. HATWAR. "Application of Neural Network Technique to improve the location specific forecast of temperature over Delhi from MM5 model." MAUSAM 60, no. 1 (2021): 11–24. http://dx.doi.org/10.54302/mausam.v60i1.958.

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India Meteorological Department (IMD) has been using direct model output (2 meters height temperature) of MM5 model as numerical guidance for forecasting maximum and minimum temperature of Delhi in short range time scale (up to 72 hours). Performance statistics of the direct model outputs of the model for maximum and minimum temperature show that forecast skill of the model is reasonably good, particularly for the minimum temperature. For further improving the model forecast, Neural Network (NN) as well as regression techniques are applied so that the systematic errors of the direct model outp

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29

Miao, Xinyuan, Lin Cheng, Yu Song, Junfeng Li, and Shengping Gong. "Semi-Analytical Planetary Landing Guidance with Constraint Equations Using Model Predictive Control." Applied Sciences 12, no. 12 (2022): 6166. http://dx.doi.org/10.3390/app12126166.

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With the deepening of planetary exploration, rapid decision making and descent trajectory planning capabilities are needed to cope with uncertain environmental disturbances and possible faults during planetary landings. In this article, a novel decoupling method is adopted, and the analytical three-dimensional constraint equations are derived and solved, ensuring real-time guidance computation. The three-dimensional motion modes and thrust profiles are analyzed and determined based on Pontryagin’s minimum principle, and a supporting semi-analytical reachability judgment method is presented, wh

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30

Wu, Jianhui, Yuanfa Ji, Xiyan Sun, and Yan Xu. "Guidance Optimization of Travelers’ Travel Mode Choice Based on Fuel Tax Rate and Bus Departure Quantity in Two-Mode Transportation System." Journal of Advanced Transportation 2020 (January 12, 2020): 1–10. http://dx.doi.org/10.1155/2020/4190632.

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This aim of this study is to improve the guidance role of the fuel tax rate and bus departure quantity on travel mode choice. Car and bus travel are chosen as the research object, and a day-to-day evolution model of dual-mode network traffic flow (based on a stochastic user equilibrium model and the method of network tatonnement process) is established. Subsequently, a guidance optimization model of fuel tax rate and bus departure quantity is designed. This guidance optimization model is formulated to determine the comprehensive minimum value among system total travel time of car travel, syste

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31

Ren, Chuanxiang, Li Wang, Changchang Yin, Zhen Wang, Xuehai Chen, and Juntao Li. "Research on the Platoon Speed Guidance Strategy at Signalized Intersections in the Connected Vehicle Environment." Journal of Advanced Transportation 2023 (June 6, 2023): 1–25. http://dx.doi.org/10.1155/2023/9984537.

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The development of connected vehicle (CV) technology has created conditions for improving the traffic efficiency of intersections and provided support for more effective speed guidance at signalized intersections. First, this paper proposes a platoon speed guidance strategy to reduce the fuel consumption and delay of the platoon passing through the intersection and smooth traffic oscillation, which includes constant speed guidance, deceleration guidance, acceleration guidance, and stop guidance. Then, the optimal speed calculation method is designed, including the calculation of the platoon’s

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32

Kumar, G. N., and A. K. Sarkar. "CMAC Trained Optimum Mid course Guidance for Tactical Flight Vehicle." Defence Science Journal 71, no. 6 (2021): 826–35. http://dx.doi.org/10.14429/dsj.71.16295.

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This paper discusses design and validation of neural network based mid-course guidance law of a surface to air flight vehicle. In present study, initially different optimal trajectories have been generated off-line of different pursuer-evader engagements by ensuring minimum flight time, maximum terminal velocity and favorable handing over conditions for seeker based terminal guidance. These optimal trajectories have been evolved by nonlinear programming based direct method of optimisation. The kinematic information of both pursuer and evader, generated based on these trajectories have been use

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33

Roshanian, J., M. Zareh, H. H. Afshari, and M. Rezaei. "An L1 adaptive closed-loop guidance law for an orbital injection problem." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 223, no. 6 (2009): 753–61. http://dx.doi.org/10.1243/09596518jsce789.

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The current paper presents the determination of a closed-loop guidance law for an orbital injection problem using two different approaches and, considering the existing time-optimal open-loop trajectory as the nominal solution, compares the advantages of the two proposed strategies. In the first method, named neighbouring optimal control (NOC), the perturbation feedback method is utilized to determine the closed-loop trajectory in an analytical form for the non-linear system. This law, which produces feedback gains, is in general a function of small perturbations appearing in the states and co

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Singh, Netra, and Manoranjan Sinha. "Suboptimal Guidance and Control Design for a Missile with Onboard Strapdown Seeker." Applied Mechanics and Materials 110-116 (October 2011): 2513–20. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.2513.

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Dynamic inversion control in conjunction with nonlinear suboptimal three dimensional (3-D) guidance law, in terminal phase, is implemented in both the pitch and yaw plane for a short range surface to surface missile with onboard active strapdown seeker. The implemented guidance and control laws intercept the target with a minimum miss distance in addition to meeting the various constraints such as line of sight, seeker field-of-view (FOV), and impact angle. This is achieved using approximate solution to Hamilton-Jacobi-Bellman (HJB) equation [1]. Dynamic inversion control is implemented in two

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35

Al Taqatqa, Firas Ahmad Saleem. "Adopting and Establishing Gifted Children Counselling and Guidance Programs." International Journal of Social Science Research and Review 5, no. 10 (2022): 472–80. http://dx.doi.org/10.47814/ijssrr.v5i10.685.

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The study's overarching goals are to determine the nature of the skills taught in schools, the characteristics of the students who excel under those circumstances, the nature of the services available to gifted children, and the nature of the factors that either stifle or foster the development of students' talents. Quantitative study would not be complete without this aspect. Data is collected through in-person interviews, on-the-job observations, and detailed notes. The method utilized to analyse the data also meets the criteria set out by Miles and Huberman. The findings indicate that gifte

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Wang, Lianzhen, Han Zhang, Lingyun Shi, Qingling He, and Huizhi Xu. "Optimization Model of Regional Traffic Signs for Inducement at Road Works." Sustainability 13, no. 13 (2021): 6996. http://dx.doi.org/10.3390/su13136996.

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A variety of pipelines are distributed under urban roads. The upgrading of pipelines is bound to occupy certain road resources, compress the driving space of motor vehicles for a long time, aggravate the traffic congestion in the construction section, and then affect the traffic operation of the whole region. A reasonable layout of traffic signs for inducement to guide the traffic flow in the area where the construction section is located is conducive to promoting a balanced distribution of traffic flow in the regional road network, so as to achieve the reduction of automobile exhaust emission

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Wan, Shizheng, Xiaofei Chang, Quancheng Li, and Jie Yan. "Finite-Horizon Optimal Tracking Guidance for Aircraft Based on Approximate Dynamic Programming." Mathematical Problems in Engineering 2019 (March 21, 2019): 1–12. http://dx.doi.org/10.1155/2019/8649781.

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Referring to the optimal tracking guidance of aircraft, the conventional time based kinematics model is transformed into a downrange based model by independent variable replacement. The deviations of in-flight altitude and flight path angle are penalized and corrected to achieve high precision tracking of reference trajectory. The tracking problem is solved as a linear quadratic regulator applying small perturbation theory, and the approximate dynamic programming method is used to cope with the solving of finite-horizon optimization. An actor-critic structure is established to approximate the

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Behr, Madeline R., Shams K. Halat, Andrew B. Sholl, Louis Spencer Krane, and Jonathan Quincy Brown. "Rapid On-Site Microscopy and Mapping of Diagnostic Biopsies for See-And-Treat Guidance of Localized Prostate Cancer Therapy." Cancers 15, no. 3 (2023): 792. http://dx.doi.org/10.3390/cancers15030792.

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Prostate cancer continues to be the most diagnosed non-skin malignancy in men. While up to one in eight men will be diagnosed in their lifetimes, most diagnoses are not fatal. Better lesion location accuracy combined with emerging localized treatment methods are increasingly being utilized as a treatment option to preserve healthy function in eligible patients. In locating lesions which are generally <2cc within a prostate (average size 45cc), small variance in MRI-determined boundaries, tumoral heterogeneity, patient characteristics including location of lesion and prostatic calcifications

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Wu, Qian, Li Hua Wang, Wenguang Chang, and Lu Yan Li. "Research on Start-up Time of the Supply Chain Emergency Plan Based on Online Method." Applied Mechanics and Materials 174-177 (May 2012): 2749–53. http://dx.doi.org/10.4028/www.scientific.net/amm.174-177.2749.

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This paper researches the optimal start-up time of emergency plan adopting online method. In view of this problem, it establishes respectively mathematical models of the single enterprise and the simple supply chain enterprises. And then competitive ratio is introduced to illustrate the effectiveness of start-up strategies. When the whole supply chain enterprises are considered as the research objective, the time asynchronous phenomena when launching the preplan appear between the single enterprise and the whole supply chain. Aimed at this phenomenon, it puts forward coordination mechanism, re

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Cree, Ian A., Zandra Deans, Marjolijn J. L. Ligtenberg, et al. "Guidance for laboratories performing molecular pathology for cancer patients." Journal of Clinical Pathology 67, no. 11 (2014): 923–31. http://dx.doi.org/10.1136/jclinpath-2014-202404.

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Molecular testing is becoming an important part of the diagnosis of any patient with cancer. The challenge to laboratories is to meet this need, using reliable methods and processes to ensure that patients receive a timely and accurate report on which their treatment will be based. The aim of this paper is to provide minimum requirements for the management of molecular pathology laboratories. This general guidance should be augmented by the specific guidance available for different tumour types and tests. Preanalytical considerations are important, and careful consideration of the way in which

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Zhong, Xiaojing, Yukun Yang, Runqing Miao, Yuqing Peng, and Guiyun Liu. "Dynamics and intermittent stochastic stabilization of a rumor spreading model with guidance mechanism in heterogeneous network." Chinese Physics B 31, no. 4 (2022): 040205. http://dx.doi.org/10.1088/1674-1056/ac587d.

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We propose a novel rumor propagation model with guidance mechanism in heterogeneous complex networks. Firstly, the sharp threshold of rumor propagation, global stability of the information-equilibrium and information-prevailing-equilibrium under R 0 < 1 and R 0 > 1 is carried out by Lyapunov method and LaSalle’s invariant principle. Next, we design an aperiodically intermittent stochastic stabilization method to suppress the rumor propagation. By using the Itô formula and exponential martingale inequality, the expression of the minimum control intensity is calculated. This method can eff

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Blinkhorn, Anthony. "Prehospital emergency anaesthesia: time taken to care for and respond to a critically injured patient." Journal of Paramedic Practice 11, no. 7 (2019): 296–301. http://dx.doi.org/10.12968/jpar.2019.11.7.296.

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The 2007 National Confidential Enquiry into Patient Outcome and Death (NCEPOD) Trauma: Who Cares? report recommended that people trained to administer anaesthesia and intubate severely injured patients should be available in prehospital environments. Published articles, reference documents and guidance reports were reviewed to compare the management plans and standard operating procedures produced by an ambulance trust in England that provides prehospital emergency anaesthesia (PHEA). Documents reviewed all provide a common un-referenced patient injury list showing indications to perform PHEA

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Bareišis, Ramūnas, Aleksandras Kirka, and Rolandas Puronas. "Accuracy, Power Consumption and Environmental Protection of Shuttle Gantry Module in Arable Farming." Solid State Phenomena 113 (June 2006): 319–24. http://dx.doi.org/10.4028/www.scientific.net/ssp.113.319.

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The theoretical and the experimental researches of guidance, energy consumption and environment protection of the shuttle gantry module are submitted. Influence of a micro-relief, chassis speed differences and correction intensity for accuracy of guidance has been determined. The characteristics of the chassis have more influences for accuracy of guidance than a rough ground. It is not effective to supply more than 60 % of oil flow for the chassis with a lower speed, because it has a negative influence on the accuracy of guidance and on the consumption of power. When distance between the optic

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Pellegrino, Marianna, Silvia Caruso, Tiziana Cantile, Gioacchino Pellegrino, and Gianmaria Fabrizio Ferrazzano. "Early Treatment of Anterior Crossbite with Eruption Guidance Appliance: A Case Report." International Journal of Environmental Research and Public Health 17, no. 10 (2020): 3587. http://dx.doi.org/10.3390/ijerph17103587.

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The purpose of this investigation was to show how to manage an anterior crossbite in early mixed dentition with an eruption guidance appliance (EGA). The analyzed clinical case reported an anterior crossbite, a bimaxillary retrusion tendency, and a horizontal growth pattern. The anterior crossbite was an unfavorable occlusal condition that could lead to a class III malocclusion growth pattern. An early treatment approach was suggested to reach a correct sagittal jaw relationship. Hence, the selected approach acted on the dentoalveolar sector, aiming to have effects on the posterior vertical di

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Zhang, Yuanxing, Bin Li, Boyuan Cao, Taoyong Li, Xingde Huang, and Xingang Yang. "Research on Optimization Control Strategy of Vehicle-Road-Grid Charging and Exchanging Based on User Demand Guidance." Journal of Physics: Conference Series 2025, no. 1 (2021): 012081. http://dx.doi.org/10.1088/1742-6596/2025/1/012081.

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Abstract Considering the time-space uncertainty of electric vehicle charging and changing demand, the uneven distribution and random diversity of charging stations, the big data cloud network is used to realize the real-time information interaction between charging and changing power station and electric vehicle. Based on the user demand orientation, an intelligent charging and changing optimization control strategy of “Vehicle-Road-Grid” integrating cloud vehicle operation data is proposed. Under the discrete electric vehicle charging demand, this strategy quickly organizes the supply informa

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Ma, Ji, David Murphy, Gregory Provan, Cian O'Mathuna, and Michael Hayes. "The Evaluation of Direct Volume Rendering-Based Uncertainty Visualization Techniques for 3D Scalar Data." International Journal of Image and Graphics 14, no. 04 (2014): 1450017. http://dx.doi.org/10.1142/s021946781450017x.

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Many techniques have been proposed to represent uncertainty in data visualization. However, little research has been reported on the evaluation of their effectiveness. Moreover, no studies have been conducted to evaluate direct volume rendering (DVR)-based uncertainty visualization techniques. In this paper, we present a novel method that evaluates the perceptual effectiveness of four existing and one proposed DVR-based uncertainty visualization techniques. Four types of searching tasks that include identifying the maximum uncertainty data, identifying the minimum uncertainty data, identifying

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Filler, Aaron. "MINIMAL ACCESS NERVE SURGERY AND INTERVENTIONAL MAGNETIC RESONANCE IMAGING." Neurosurgery 65, suppl_4 (2009): A212—A221. http://dx.doi.org/10.1227/01.neu.0000346253.89837.6c.

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Abstract OBJECTIVE Develop and assess the utility of novel minimal access techniques including percutaneous open-configuration interventional magnetic resonance imaging (iMRI), open surgery using open or closed/cylindrical iMRI systems, and minimal access open surgery with electromyographic guidance in a standard operating room. METHODS For more than 2500 percutaneous open iMRI procedures, 25 incisional surgery open iMRI cases, 3 incisional surgery closed/cylindrical iMRI cases, 25 computed tomography–guided percutaneous procedures, and more than 1000 minimal access incisional surgery cases in

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Rusdianah, Eva, Mubasysyir Hasanbasri, and Mohammad Hakimi. "Clinical learning experiences and professional development: implementation of a district level undergraduate midwifery program in Indonesia." Berita Kedokteran Masyarakat 32, no. 2 (2016): 73. http://dx.doi.org/10.22146/bkm.27384.

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PurposeThe aim is to examine the suitability of the educational process in place with the expected professional development.MethodWe conducted in-depth interviews with (a) 16 third-year student who recently completed 2-month clinical rotation in the hospital and (b) four teachers.ResultsEvidence from this study indicate weak learning environment. Clinical instructor only has a limited time to meet with students, so that students rarely get the guidance and direct supervision. Students more often obtain “lessons” of the young staff, which many of them indifferent in providing guidance. Students

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JAFARI, G. R., A. BAHRAMINASAB, and P. NOROUZZADEH. "WHY DOES THE STANDARD GARCH(1, 1) MODEL WORK WELL?" International Journal of Modern Physics C 18, no. 07 (2007): 1223–30. http://dx.doi.org/10.1142/s0129183107011261.

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The AutoRegressive Conditional Heteroskedasticity (ARCH) and its generalized version (GARCH) family of models have grown to encompass a wide range of specifications, each of them is designed to enhance the ability of the model to capture the characteristics of stochastic data, such as financial time series. The existing literature provides little guidance on how to select optimal parameters, which are critical in efficiency of the model, among the infinite range of available parameters. We introduce a new criterion to find suitable parameters in GARCH models by using Markov length, which is th

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Fuse, Hiraku, Kenji Komatsu, Hiroyuki Arakawa, Takeji Sakae, and Fujisaki Tatsuya. "An infrared interactive patient position guidance and acquisition control system for use during radiotherapy treatment." Journal of Radiotherapy in Practice 16, no. 3 (2017): 303–10. http://dx.doi.org/10.1017/s1460396917000140.

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AbstractBackgroundThe control of patient position, posture and respiratory movements during radiotherapy is important for effective and specific treatment of malignancy. We have developed an infrared (IR) interactive patient position guidance and acquisition control system for clinical use, comprising IR cameras, IR markers and dedicated software.Materials and methodsWe evaluated the system with ten healthy volunteers and ten experienced operators. IR markers were placed on the body surface. Their positions were calculated using vectors of three translational and three rotational parameters, a

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