We present a novel MoM-MFIE discretization that performs very close to the MoM-EFIE in the electromagnetic analysis of moderately small objects. This new MoM-MFIE discretization makes use of a new set of basis functio...
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We present a novel MoM-MFIE discretization that performs very close to the MoM-EFIE in the electromagnetic analysis of moderately small objects. This new MoM-MFIE discretization makes use of a new set of basis functions that we name monopolar RWG and are derived from the RWG basis functions. We show for curved and sharp-edged objects that the new monopolar MoM-MFIE formulation outperforms the conventional MoM-MFIE with RWG basis functions.
City residences are highly dependent on certain key public services whose profits rely on the accuracy of meters. Based on achievements of the automation electric reading system in China power grid, State Grid Shangha...
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SOI is becoming a well accepted technology, but for circuit designers, it still has hidden roadblocks and unknown performance gains. To help circuit designers make choices, a design methodology for SOI is presented, a...
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SOI is becoming a well accepted technology, but for circuit designers, it still has hidden roadblocks and unknown performance gains. To help circuit designers make choices, a design methodology for SOI is presented, and basic design concepts are reviewed, including the impact of floating body.
In this work we extend and complete a new didactical device that we are experiencing so-called Trajectory of Study and Research (TSR). The TSR model that we propose is located at Engineering Schools, where we are teac...
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In this work we extend and complete a new didactical device that we are experiencing so-called Trajectory of Study and Research (TSR). The TSR model that we propose is located at Engineering Schools, where we are teaching. By the instrumental nature that has the mathematical activity in this environment, in the TSR which we are designing has a strong role, on the one hand, the mathematical modeling (understood as functional teaching of mathematics), and on the other hand, the computer tool is used as natural instrument of mathematical work in the construction of projects which give answers to problematic situations. The raison d'être of the mathematical activity appears linked to related issues with the engineering world.
Information support systems for coping with and mastering increasing process complexity are becoming a success factor for many companies. The information systems available today are predominantly implemented as mobile...
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The spread of rumors in online networks threatens public safety and results in economic losses. To overcome this problem, a lot of work studies the problem of rumor control which aims at limiting the spread of rumors....
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ISBN:
(纸本)9783031333828;9783031333835
The spread of rumors in online networks threatens public safety and results in economic losses. To overcome this problem, a lot of work studies the problem of rumor control which aims at limiting the spread of rumors. However, all previous work ignores the relationship between the influence block effect and counts of impressions on the user. In this paper, we study the problem of minimizing the spread of rumors when impression counts. Given a graph G(V, E), a rumor set R is an element of V, and a budget k, it aims to find a protector set P is an element of V \ R to minimize the spread of the rumor set R under the budget k. Due to the impression counts, two following challenges of our problem need to be overcome: (1) our problem is NP-hard;(2) the influence block is non-submodular, which means a straightforward greedy approach is not applicable. Hence, we devise a branch-and-bound framework for this problem with a (1 1/e- is an element of) approximation ratio. To further improve the efficiency, we speed up our framework with a progressive upper bound estimation method, which achieves a (1 - 1/e - is an element of - rho) approximation ratio. We conduct experiments on real-world datasets to verify the efficiency, effectiveness, and scalability of our methods.
It is often essential that the behavior of certain tools inside of the bottomhole assembly (BHA) be understood, prior to automating the well construction process. The mud motor is one of the most frequently used BHA c...
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ISBN:
(纸本)9781613998359
It is often essential that the behavior of certain tools inside of the bottomhole assembly (BHA) be understood, prior to automating the well construction process. The mud motor is one of the most frequently used BHA components worldwide. This paper presents several digital well construction procedures in which a mud motor is located inside of the BHA. Mud motors can be directly used in a steering mode or can be combined with the most advanced rotary steerable system (RSS) tools in power only mode because their downhole power ability is unrivaled, and their usage reduces the power needed from surface, making the well construction more sustainable. When considering the six primary surface measurements of well construction (hookload, block position, torque, rpm, pressure, and flow), the interpretation of four of the measurements is directly affected by the presence or not of a mud motor inside the BHA, whether the mud motor is in steering mode or in power only mode. To understand these measurements, a basic understanding of the mud motor physics is required. This paper will present some of the kinematics of the mud motor power section and how it relates to the monitoring, advising, or controlling of the drilling process. In particular, some key equations will be shown that correlate surface measurements to the downhole drill-bit motion through the motor physics. It will be shown that when a mud motor is present, there is a torque discontinuity between the upper portion (above the motor) of the BHA and drillstring and the lower portion of the BHA (below the motor). In addition, equations to fit mud motor power curves are derived, which enables interpretation of the motor power section performance based on the chosen configuration. The acoustic impedance theory for the mud motor will also be shown, which enables understanding the transient effect of flow fluctuations when different torque demands from the drill-bit exist. All these derivations are included in a new mecha
Linear programming was used for conjunctive use of canal water and groundwater to develop a cropping pattern for optimal net saving to the farmers in Bhagwanpur Distributary of the Eastern Gandak project. Constraints ...
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ISIS (Initiative for Space Innovative Standards) is a project lead by CNES, and two of its industrial partners (namely Airbus Defense & Space and Thales Alenia Space France), with the intention of rationalizing sp...
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ISBN:
(数字)9781624102219
ISBN:
(纸本)9781624102219
ISIS (Initiative for Space Innovative Standards) is a project lead by CNES, and two of its industrial partners (namely Airbus Defense & Space and Thales Alenia Space France), with the intention of rationalizing space housekeeping services, from onboard equipment to inorbit operations, the ultimate objective being to decrease overall mission costs. As part of this project, a new Operations Center (or Command and Control Center, under-mentioned as CCC) has been designed to operate ISIS standard compliant CNES forthcoming missions. The target is a generic CCC, that could operate scientific or military missions, missiondedicated or multi-missions CCC, managing single or multi-satellites missions as well.
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