The over exploitation of groundwater has seriously restricted the healthy development social economy in North China Plain (NCP). study change storage at different time scales is helpful to understand characteristics dynamic changes and real-time management. Based on Gravity Recovery Climate Experiment (GRACE) satellite products Global Land Data Assimilation System (GLDAS) data, this paper analyses seasonal long-term trend NCP from June 2003 2017 by using adaptive Ensemble Empirical Mode...

Vehicle-to-Grid (V2G) technology utilizes the stored energy in electric vehicle batteries to contribute electricity back grid. The can move with vehicles (EVs). Combining V2G and mobility of vehicles, EVs provide a natural transmission architecture called mobile electrical main idea this paper focuses on multiple route grid from solar sources places as capacity every is limited. features are analyzed minimum cost flow algorithm presented. Simulations using real-world transporting data...

A tree-based topology is often used to flood packets from the sink node in wireless sensor networks (WSNs). Therefore, flooding tree construction an important and fundamental problem WSNs, has been extensively investigated literature. However, we note that asynchronous low-duty-cycle WSNs not sufficiently existing work. In this work, focus our investigation on minimum-delay energy-efficient considering duty-cycle operation unreliable links. We formulate as a undetermined-delay-constrained...

Beijing-Tianjin-Hebei (BTH) region, China BTH has long been suffering from severe and uneven land subsidence. Finding out the spatial evolution of subsidence is helpful to collaborative prevention control. We innovatively revealed distribution mountains coastal area along four hydrogeological profiles, inferred mechanism on overall scale, local plain scale typical regional scale. Small Baseline Subsets Interferometric Synthetic Aperture Radar was employed collect displacement information in...

Wireless sensor networks are often deployed for tracking moving objects. Many algorithms have been proposed with two general assumptions: the preset fingerprints(prior landmark or context information) and an interference-free environment. These algorithms, however, cannot be used on-demand deployment where finger-prints unavailable would perform poorly in interference-rich environments. In this paper, we present a fingerprint-free localizing algorithm, called Enhanced Field Division (EFD)....

Beijing-Tianjin-Hebei (BTH) has been suffering from severe groundwater storage (GWS) consumption and land subsidence (LS) for a long period. The overexploitation of brings about subsidence, which affects the safety development BTH. In this paper, we utilized multi-frame synthetic aperture radar datasets obtained by Rardarsat-2 satellite to monitor subsidence’s temporal spatial distribution in BTH 2012 2016 based on multi-temporal interferometric (MT-InSAR). addition, also employed Gravity...

Indoor localization, an emerging technology in location based service (LBS), is now playing a more and important role both commercial civilian industry. Global position system (GPS) the most popular solution outdoor localization field, accuracy around 10 meter error positioning. However, with complex obstacles buildings, problems rise “last mile” of which encourage momentum indoor localization. The traditional either range-based or fingerprinting-based, requires lot time efforts to do...

Localization proves to be a promising application of wireless sensor networks. Although considerable number algorithms have been designed for low-overhead and high-accuracy localization, problems remain tackled such as the way use anchor-deploying. In this paper, we present mechanism range-free localization called Enhanced Map Segmentation (EMS) deploy segment map where precise indoor is required. Despite limits environmental noise, sensing irregularity, received signal strength (RSS)...

Abstract Terrestrial water storage anomaly (TWSA), derived from Gravity Recovery and Climate Experiment (GRACE) satellites, has been widely used in hydrology studies. The inversion is commonly achieved by truncating filtering spherical harmonic coefficients (SHC), whereby the result characterized leakage error low resolution. It remains unclear whether machine learning methods can help resolve this challenging issue. In study, we present a convolutional neural network (CNN) approach to...

The effect of diffusion annealing on composition uniformity Hastelloy C-276 ingot has been investigated. alloy ingots were annealed under the condition 1120°C(for 10h and 70h), 1170°C(10h 20h) 1200°C(10h 15h). dendrite spacing segregation both as-cast homogenized studied by means thermal-calc software, optical microscopy SEM. experimental results demonstrated that dendrites Mo existed in C276 ingots. largest was area 1/2R(radius), degree elements edge ingots, coefficient 1.278. After holding...

Abstract Steam flooding is an effective method to enhance oil recovery in heavy reservoirs. However, the influence factors of steam will affect development reservoir after traditional water flooding. So dynamic prediction needs be performed before scheme implemented. In this study, 3D model was established by numerical simulation software CMG; Combined with operating parameters oilfield, temperature, injection timing and quality on effect L7 block offshore studied using model. The results...

<p>Recent studies show that groundwater depletion is an unreported source of atmospheric CO<sub>2</sub> through bicarbonate reactions in the released from aquifer. However, can be mitigated or offset by recharge, and thus contrasting roles recharge on carbon cycle remain unclear at a national scale. Here, we extend previous to use satellite–derived storage change (GWSC) substantial situ measurements ion concentration (BIC), for first time evaluation GWSC–induced...

Tracking moving objects is always a critical challenge in cyber-physical systems. Researchers have proposed many tracking algorithms. However, most of the algorithms cannot be used for on-demand deployment because unavailable preset fingerprints (prior landmark or context information) their assumption. Another issue that those with models built an interference-free environment work interference-rich environments. To address issues, we propose localizing and algorithm called Enhanced Field...

Smart grid can utilize energy stored in electric vehicles (EVs) through Vehicle-to-Grid(V2G) technology. When EVs mobility combines with V2G technology, form up an transmission network called EV network. greatly relies on renewable energy, however, there are periods when supply is not enough due to external factors like the lack of wind or sunlight. If no adjustment made towards shortage, will soon collapse. This paper studies how keep functioning normally shortage happens. Related terms...

Abstract This paper proposes a photovoltaic grid-connected inverter based on Z-source NPC three-level topology to achieve buck-boost control and improve the transmission efficiency of system. In view instability output power system, which affects inverter, this dual closed-loop sliding mode strategy. The DC bus voltage outer loop strategy adopts traditional current inner PI weaken system chatter. anti-interference ability harmonic content were studied through Matlab/Simulink simulation...

On the base of analyzing genetic algorithm's advantages and disadvantages in terms biological immunity concept, we proposed one new algorithm-A parallel immune algorithm based on simulated annealing. The uses way vaccination vaccine question's prior knowledge, to speed up convergence rate effectively. At same time, prevent "precociously" phenomenon occurrence, it has used simulation annealing operator, so can guarantee optimization process toward direction global optimum use mind computing...

Researchers in the past have shown that Symmetric key cryptography is generally considered infeasible and public cryptography, at times, fails to provide sufficient security integrity data. In contrast this prejudice, our paper presents a novel approach establishes data through encryption techniques like RSA more importantly it identifies randomized path route messages from source destination ensures packets are delivered safely even when intermediate nodes attacked by identifying alternate...