130,874 research outputs found
The Vehicle Routing Problem with Divisible Deliveries and Pickups
No full textThe vehicle routing problem with divisible deliveries and pickups is a new and interesting model within
reverse logistics. Each customer may have a pickup and delivery demand that have to be served with
capacitated vehicles. The pickup and the delivery quantities may be served, if beneficial, in two separate visits.
The model is placed in the context of other delivery and pickup problems and formulated as a mixed-integer
linear programming problem. In this paper, we study the savings that can be achieved by allowing the pickup
and delivery quantities to be served separately with respect to the case where the quantities have to be served
simultaneously. Both exact and heuristic results are analysed in depth for a better understanding of the problem
structure and an average estimation of the savings due to the possibility of serving pickup and delivery
quantities separately
Suso in Italia bella giace un laco. Il territorio bresciano al tempo di Dante
No full textStorici e critici letterari si sono interrogati sui luoghi frequentati da Dante nel corso della sua vita e del peregrinare per le corti italiane. Anche per Brescia non mancano suggestioni sulla presenza del sommo poeta in città o nel territorio, senza tuttavia sicuri riscontri documentari. Tra XIII e XIV secolo Brescia e il suo contado furono al centro di trasformazioni che, dalle forme di governo comunale, videro affermarsi un variegato sperimentalismo di matrice signorile, dai Maggi, ai Visconti, agli Scaligeri, che viene presentato nel saggio.Historians and literary critics have questioned the places Dante visited during his life and wandering through the Italian courts. Also for Brescia there is no lack of suggestions on the presence of the great poet in the city or in the territory, without certain documentary evidence. The essay shows how, between the thirteenth and fourteenth centuries, Brescia and its countryside were at the center of transformations which, from the forms of municipal government, saw the affirmation of an experimentalism of the seigniories, from the Maggi to the Visconti, up to the Scaligeri
Archetti G., a cura di, Lungo le strade della fede. Pellegrini e pellegrinaggio nel bresciano. Atti della Giornata di studio (Brescia, 16 dicembre 2000), Associazione per la storia della Chiesa bresciana, Brescia 2001
No full textRecensione al volume: Archetti G., a cura di, Lungo le strade della fede. Pellegrini e pellegrinaggio nel bresciano. Atti della Giornata di studio (Brescia, 16 dicembre 2000), Associazione per la storia della Chiesa bresciana, Brescia 200
Investigation of early supplementation of nucleotides on the intestinal maturation of weaned piglets
No full textNucleotides are essential for the development of the gastrointestinal tract and immune function, but their intake with milk by piglets could be insufficient. The effect of nucleotides on growth and health was tested on 98 piglets divided into two groups: NU, orally administrated with 4 mL of a nucleotide-based product (SwineMOD® ) at 10, 15, 18, 21, 27 days, or not (CO). Blood and feces were sampled at weaning (26 d, T1), and at 38 d (T2). Per each group and time-point, eight piglets were slaughtered and jejunal Peyer’s patches (JPPs) were collected. NU increased hemoglobin content and hematocrit, but not growth. At weaning, the NU fecal microbiota was characterized by the abundance of Campylobacteraceae, more typical of the growing phase, compared to CO, with a greater abundance of Streptococcaceae. For the blood transcriptome, an initial greater inflammatory activation was seen in CO, while at T2, NU enriched gene sets related to erythropoiesis. The activation of gene groups ranging from epigenetic response to transcriptional regulation evidenced an intense proliferative activity in NU JPPs. NU supplementation did not influence the growth performance of piglets but could have expressed a positive effect on pig microbiota anticipating its maturation at weaning. This immunostimulant activity in the JPPs could moderate the inflammation in the immediate pre-weaning
A triple bottom line optimization model for assignment and routing of on-demand home services
No full textIntegrating public transport in sustainable last-mile delivery: Column generation approaches
No full textMonitoring Northern Adriatic Seashore At Jesolo Resort
No full textJesolo is the main seaside resort on the northern Adriatic
seashore, and among the most important along the whole
Italian coast, attracting millions of international tourists every
year. It is located in northwest Italy, close by the Venice lagoon.
During late fall and winter, it is exposed to intense wind storms that cause severe sediment mobilization and, in some cases, beach
reshaping events. Considering its economic relevance
and the multiple activities taking place on the sea (tourism, fishery, diving,
etc.), Jesolo beach is an ideal candidate for implementing research activities aimin to investigate marine and coastal dynamics.
The development of innovative modeling and monitoring approaches will lead to more efficient coastal planning and management, in the wake of
the increasing awareness about coastal vulnerability issues, including climate change-related phenomena.
In the framework of the Italian Flagship Project RITMARE—the
Italian Research for the Sea, Subproject 3 (Coastal Waters), Workpackage 4 (Coastal Oceanographic Modeling), the Jesolo littoral zone
has been identified as the Strategic Test Area for the study of coastal dynamics and for the collection of a time series of integrated measurements to support comprehensive, detailed insight on coastal
circulation, wave dynamics, sediment transport and coastal erosion.
The research plan, launched in spring 2013, envisaged the deployment of an acoustic system for the continuous measurement of vertical 3D current profiles and wave spectral parameters approaching the coast. A video monitoring system was installed for a high-frequency survey of the key morphological metrics along the coastal reach. Thisis flanked by a morphobathymetric survey plan allowing a high-detail description of morphological variations, a thorough estimate of sediment fluxes and the validatio of the video monitoring system.
The research area covers approximately 1.5 square kilometers, ranging nearly 1 kilometer in the long-shore direction and 1.5 kilometers in the cross-shore direction, reaching an offshore depth of 10 meters and enclosing the whole active beach.
The data collected will be used for calibrating of a standard alkaline battery in these conditions is approximately 100 days, but the bottleneck for system maintenance is caused by severe biofouling occurring in the shallow working environment, requiring at least monthly upkeep inspections
Neural combinatorial optimization: A tutorial
No full textRecent advancements in deep reinforcement learning have sparked a growing interest in the application of this approach to solve combinatorial optimization (CO) problems. This paper presents neural combinatorial optimization (NCO) as a framework for constructing functions that work as heuristics for CO problems. Given the rapid expansion of the field and the increasing interest in the topic, this tutorial introduces the main techniques utilized in NCO and explores the current open issues in the field. We define key terms and concepts related to NCO and present the latest developments, using the Knapsack Problem as a running example to complement theoretical explanations. Finally, we analyze prominent works in the field of NCO, with a focus on their application to the Traveling Salesman Problem, which serves as the most extensively studied problem in this domain
Vehicle routing problems with profits
No full textThe key characteristic of the class of Vehicle Routing Problems with Profits (VRPPs) is that, contrary to what happens for the most classical vehicle routing problems, the set of customers to serve is not given. Therefore, two different decisions have to be taken: (i) which customers to serve, and (ii) how to cluster the customers to be served in different routes (if more than one) and order the visits in each route. In general, a profit is associated with each customer that makes such a customer more or less attractive. Thus, any route or set of routes, starting and ending at a given depot, can be measured both in terms of cost and in terms of profit. The difference between route profit and cost may be maximized, or the profit or the cost optimized with the other measure bounded in a constraint
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