Summary Unconventional gas resources from tight-sand and shale reservoirs have received great attention in the past decade around world because of their large reserves technical advances developing these resources. As a result improved horizontal-drilling hydraulic-fracturing technologies, progress is being made toward commercial production such reservoirs, as demonstrated US. However, understandings technologies needed for effective development unconventional are far behind industry needs...

Deploying direct device-to-device (D2D) links is a promising technology for vehicle-to-X (V2X) applications. However, intracell interference, along with stringent requirements on latency and reliability, are challenging issues. In this paper, we study the radio resource management problem D2D-based safety-critical V2X communications. We first transform into constraints that computable using slowly varying channel state information only. Secondly, formulate an optimization problem, taking...

The capacitated network design problem is a multicommodity minimal cost flow with fixed charges on the arcs and well known to be NP-hard. type very common in context of transportation networks, telecommunication etc. In this paper we propose an efficient method for problem, based Lagrangian heuristic within branch-and-bound framework. uses relaxation obtain easily solved subproblems solves dual by subgradient optimization. It also includes techniques finding primal feasible solutions. then...

Wireless communications using ad hoc networks are receiving an increasing interest. The most attractive feature of is the flexibility. network set up by a number units in manner, without need any fixed infrastructure. Communication links established between two if signal strength sufficiently high. As not all pairs nodes can establish direct links, traffic may have to be relayed through other units. This known as multihop functionality. Design challenging task. In this paper we study problem...

System-centric modeling and analysis are of key significance in planning optimizing cellular networks. In this paper, we provide a mathematical performance for LTE The system model characterizes the coupling relation between cell load factors, taking into account non-uniform traffic demand interference cells with arbitrary network topology. Solving enables network-wide evaluation resource consumption. We develop prove both sufficient necessary conditions feasibility load-coupling system,...

Deployment and maintenance of UMTS networks involve optimizing a number network configuration parameters in order to meet various service performance requirements. In this article we address automated optimization coverage radio base station antenna configuration. We consider three key parameters: transmit power the common pilot channel (CPICH), tilt, azimuth. CPICH greatly influences coverage. From resource management point view, satisfying requirement using minimum offers several...

Heterogeneous networks (HetNets) with a topology of mixed macro-cells and low-power nodes (LPNs) form an important step capacity enhancement for LTE LTE-A. In this paper, we present optimization framework load balancing in HetNets, by means cell range assignment using cell-specific offset. For any given offset setting, the resulting is effectively approached via solution system non-linear equations characterizing load-coupling relation between cells. We computationally efficient bounding...

Abstract Unconventional gas resources from tight sand and shale reservoirs have received great attention in the past decade around world, because of their large reserves as well technical advances developing these resources. As a result improved horizontal drilling hydraulic fracturing technologies, progresses are being made towards commercial production such reservoirs, demonstrated US. However, understandings technologies needed for effective development unconventional far behind industry...

We provide a general framework for the problem of data offloading in heterogeneous wireless network, where some demand cellular users is served by complementary network. The network either small-cell that shares same resources as or WiFi uses orthogonal resources. For given load, level resource usage, each cell depends non-linear manner on load other cells due to mutual coupling interference seen one another. With coupling, we optimize be networks, so maximize utility function. consider...

Summary Carbon dioxide (CO2) injection is an effective enhanced-oil-recovery (EOR) method in unconventional oil reservoirs. However, investigation of the CO2 huff ’n’ puff process tight reservoirs with nanopore confinement lacking petroleum industry. The conventional models need to be modified consider both phase equilibrium and fluid transport. Hence, we develop efficient model fill this gap apply field production Bakken reservoir. Complex-fracture geometries are also handled model. First,...

Summary Fractured vuggy reservoir is a typical type of carbonate reservoir. The 3D complex fracture networks and Stokes flow inside vugs make fractured simulation remain challenging problem. Most the proposed models in previous studies are computation consuming, which cannot meet with demand field application. In this paper, novel efficient hybrid model, consisting modified embedded discrete model (EDFM) vug to simulate multiphase reservoirs. EDFM improves fracture-discretization process by...

The red imported fire ants (RIFAs) are a globally important invasive pest that severely affects the ecosystem and human health, its current control is primarily through chemical pesticides. However, extensive use of pesticides causes environmental problems, alternative strategies for controlling this being explored. In our study, we aimed to design deep eutectic solvent (DES)-CaCO

Abstract The stability of faults must be evaluated carefully for reliable and successful geological CO2 storage (GCS) projects, especially in reservoirs with abundant fractures faults. induced slip reactivation fractured can create significant leakage pathways. Therefore, investigating the geomechanical response on through hydromechanical coupled simulations is crucial but challenging. It requires constructing fine computational grids that conform to faults, which arduous 3D field-scale...

The multicommodity network-flow model concerns routing of a number commodities through capacitated network at minimal cost. In the basic model, it is assumed that for each commodity, flow can be routed on any path connecting its origin and destination. telecommunication applications, where commodity represents communication pair, there are often additional time-delay or reliability requirements paths used routing. These may vary by represented different priority classes. this paper, we...

A fundamental aspect in performance engineering of wireless networks is optimizing the set links that can be concurrently activated to meet given signal-to-interference-plus-noise ratio (SINR) thresholds. The solution this combinatorial problem key element scheduling and cross-layer resource management. In paper, we assume multiuser decoding (MUD) receivers, which cancel strongly interfering signals. As a result, contrast classical spatial reuse, being close each other are more likely active...