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Gotowe bibliografie tematyczne / Quadratic Service Costs

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Artykuły w czasopismach

Gotowa bibliografia na temat „Quadratic Service Costs”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "Quadratic Service Costs"

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Qi, Yuan, Xin Chen, Jiaqing Zhang, Yaoyao Li, and Daolin Zhu. "How Do Rising Farmland Costs Affect Fertilizer Use Efficiency? Evidence from Gansu and Jiangsu, China." Land 11, no. 10 (2022): 1730. http://dx.doi.org/10.3390/land11101730.

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As the farmland transfer market in China develops, moderate-scale operations increasingly grow but without much improvement in fertilizer use efficiency. This study theoretically analyzes the mechanism and effect of rising farmland costs on fertilizer use efficiency using multiple quadratic regression and mediating effects models. It empirically tests a micro-sample of 806 farmers in Gansu and Jiangsu provinces in China from two dimensions: the full samples and farmer heterogeneity. The results showed 0.544 as the average fertilizer use efficiency (hereinafter, fe) of farmers in Gansu and Jian

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Bertsimas, Dimitris, Arthur Delarue, and Sebastien Martin. "Optimizing schools’ start time and bus routes." Proceedings of the National Academy of Sciences 116, no. 13 (2019): 5943–48. http://dx.doi.org/10.1073/pnas.1811462116.

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Maintaining a fleet of buses to transport students to school is a major expense for school districts. To reduce costs by reusing buses between schools, many districts spread start times across the morning. However, assigning each school a time involves estimating the impact on transportation costs and reconciling additional competing objectives. Facing this intricate optimization problem, school districts must resort to ad hoc approaches, which can be expensive, inequitable, and even detrimental to student health. For example, there is medical evidence that early high school starts are impacti

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Chen, Chen, Xinrui Song, and Junli Zhu. "Impact of slack resources on healthcare costs in tertiary and secondary hospitals: a panel data study of public hospitals in Beijing from 2015 to 2019." BMJ Open 13, no. 4 (2023): e068383. http://dx.doi.org/10.1136/bmjopen-2022-068383.

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ObjectiveThis study aims to explore the relationship between slack resources and cost consumption index in tertiary and secondary hospitals and to provide targeted healthcare resource utilisation recommendations for tertiary and secondary hospital managers.DesignThis is a panel data study of 51 public hospitals in Beijing from 2015 to 2019.SettingTertiary and secondary public hospitals in Beijing. Data envelope analysis was used to calculate the slack resources. Regression models were used to explore the relationship between slack resources and healthcare costs.ParticipantsA total of 255 obser

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Niu, Zhiqiang, Shengnan Wu, and Xuesong (Simon) Zhou. "Efficient Mathematical Lower Bounds for City Logistics Distribution Network with Intra-Echelon Connection of Facilities: Bridging the Gap from Theoretical Model Formulations to Practical Solutions." Algorithms 16, no. 5 (2023): 252. http://dx.doi.org/10.3390/a16050252.

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Focusing on the dynamic improvement of the underlying service network configuration, this paper aims to address a specific challenge of redesigning a multi-echelon city logistics distribution network. By considering the intra-echelon connection of facilities within the same layer of echelon, we propose a new distribution network design model by reformulating the classical quadratic assignment problem (QAP). To minimize the overall transportation costs, the proposed model jointly optimizes two types of decisions to enable agile distribution with dynamic “shortcuts”: (i) the allocation of wareho

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WAN, Eric Yuk Fai, Weng Yee Chin, Esther Yee Tak Yu, et al. "Retrospective cohort study to investigate the 10-year trajectories of disease patterns in patients with hypertension and/or diabetes mellitus on subsequent cardiovascular outcomes and health service utilisation: a study protocol." BMJ Open 11, no. 2 (2021): e038775. http://dx.doi.org/10.1136/bmjopen-2020-038775.

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IntroductionHypertension (HT) and diabetes mellitus (DM) and are major disease burdens in all healthcare systems. Given their high impact on morbidity, premature death and direct medical costs, we need to optimise effectiveness and cost-effectiveness of primary care for patients with HT/DM. This study aims to find out the association of trajectories in disease patterns and treatment of patients with HT/DM including multimorbidity and continuity of care with disease outcomes and service utilisation over 10 years in order to identify better approaches to delivering primary care services.Methods

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Kovalyov, М. Ya, B. M. Rozin, and I. A. Shaternik. "Approach to optimizing charging infrastructure of autonomous trolleybuses for urban routes." Informatics 18, no. 4 (2021): 79–95. http://dx.doi.org/10.37661/1816-0301-2021-18-4-79-95.

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P u r p o s e s. When designing a system of urban electric transport that charges while driving, including autonomous trolleybuses with batteries of increased capacity, it is important to optimize the charging infrastructure for a fleet of such vehicles. The charging infrastructure of the dedicated routes consists of overhead wire sections along the routes and stationary charging stations of a given type at the terminal stops of the routes. It is designed to ensure the movement of trolleybuses and restore the charge of their batteries, consumed in the sections of autonomous running.The aim of

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Helfrich, Kathleen, and Donald F. Vitaliano. "Size and Cost Efficiency in the Production of Local Road Services." Public Works Management & Policy 3, no. 2 (1998): 124–32. http://dx.doi.org/10.1177/1087724x9800300203.

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The authors analyze 925 town highway departments in New York to determine potential economies from consolidation and the degree of cost efficiency. Only 15% of departments would reduce costs by merging, resulting in an average 13% reduction in expenditures. In addition, all of the towns are cost inefficient by an average 17%. Size economies are estimated using a log quadratic stochastic frontier regression model. The estimated cost curve is a textbook U shape with a mean cost elasticity of 0.97, indicating that most towns are operating at the minimum point of the curve. The composed error mode

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Lin, Ming-Hua, Jung-Fa Tsai, Yi-Chung Hu, and Tzu-Hsuan Su. "Optimal Allocation of Virtual Machines in Cloud Computing." Symmetry 10, no. 12 (2018): 756. http://dx.doi.org/10.3390/sym10120756.

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Virtualization is one of the core technologies used in cloud computing to provide services on demand for end users over the Internet. Most current research allocates virtual machines to physical machines based on CPU utilization. However, for many applications that require communication between services running on different servers, communication costs influence the overall performance. Therefore, this study focuses on the optimal allocation of virtual machines across multiple geographically dispersed data centers, with the objective of minimizing communication costs. The original problem can

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Lin, Whei-Min, Chung-Yuen Yang, Ming-Tang Tsai, and Yun-Hai Wang. "Unit Commitment with Ancillary Services in a Day-Ahead Power Market." Applied Sciences 11, no. 12 (2021): 5454. http://dx.doi.org/10.3390/app11125454.

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This paper integrates Discrete Particle Swarm Optimization (DPSO) and Sequential Quadratic Programming (SQP) to propose a DPSO-SQP method for solving unit commitment problems for ancillary services. Through analysis of ancillary services, including Automatic Generation Control (AGC), Real Spinning Reserve (RSR), and Supplemental Reserve (SR), the cost model of unit commitment was developed. With the requirements of energy balance, ancillary services, and operating constraints considered, DPSO-PSO was used to calculate the energy supply of each source, including the associated AGC, RSR, and SR,

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León-Quismondo, Jairo, José Bonal, Pablo Burillo, and Álvaro Fernández-Luna. "Walkability and Fitness Center Prices, Opening Hours, and Extra Services: The Case of Madrid, Spain." International Journal of Environmental Research and Public Health 17, no. 15 (2020): 5622. http://dx.doi.org/10.3390/ijerph17155622.

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Walkability has been associated with urban development and political plans, contributing to more connected cities with improvements in communication, shopping, and pedestrian base. Among these services, fitness centers are becoming important elements for communities due to their impact on the health and welfare of citizens. The present study aims to examine how an area’s Walk Score® affects fitness center services, specifically membership costs, opening hours, and aquatic services. Data from 193 fitness centers were retrieved, representing all the areas of the municipality of Madrid, Spain, in

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