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4341
A Shocking Complication of a Pneumothorax: Chest Tube-Induced Arrhythmias and Review of the Literature
Published 2014-01-01“…We describe a patient with a recent chest tube insertion leading to atrial fibrillation with rapid ventricular rate that led to multiple inappropriate internal cardiac defibrillator (ICD) shocks. …”
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4342
La notion de société civile dans les politiques et pratiques du développement
Published 2010-06-01“…This success came along with multiple criticisms relating to its “misty” character, its multiple ideological orientations as well as its scientific un-utility for the analysis of the political and social changes outside the western world. …”
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4343
Adjudicating between face-coding models with individual-face fMRI responses.
Published 2017-07-01“…Our study demonstrates the importance of comparing multiple models and of modeling the measurement process in computational neuroimaging.…”
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4344
Double-component combined generalized weighted fractional Fourier transform based waveform design for massive MIMO
Published 2023-12-01“…In order to overcome the drawback of conventional diversity technologies that sacrificing valuable communication resources such as data rate or bandwidth in massive multiple input multiple output (MIMO) systems, a double-component combined generalized weighted fractional Fourier transform (DCGWFRFT) based waveform design method was proposed.The concept of computational diversity was introduced, and the diversity performance was improved via moderate computational resources without requiring channel state information at the transmitter.The principle of computational diversity of DCGWFRFT based waveform was firstly analyzed, and a DCGWFRFT based waveform design and transform process, which could be adopted combined with existing diversity methods, was then proposed according to the principle.Theoretical analysis proves that the proposed waveform design and transform process can perfectly recover the original transmitted signal in noise-free case, and the power of error of proposed waveform is distributed more evenly than that of untransformed waveform in noisy case.Simulation results show that the performance of DCGWFRFT based waveform has an advantage of at least 1.7 dB in bit signal-to-noise ratio compared with untransformed waveform when bit error rate is 10<sup>-3</sup>.…”
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4345
Extraction of Weak Scatterer Features Based on Multipath Exploitation in Radar Imagery
Published 2017-01-01“…Improving the quantity of the prediction, including multipath scattering effects (neglected under the Born approximation), allows us to solve the inverse problem. The multiple bounce (multipath) scattering effect is the interaction of more than one target in the scene. …”
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4346
Burnout among nurses practicing in critical care units: Predicting the contributing factors
Published 2025-01-01“…Descriptive statistics and multiple regression were used for data analysis. Results: The multiple regression showed that nurses’ anxiety, stress, alarm fatigue, depression, and time span positively predict nurses’ burnout (P value = .000.,000.,000.,033.,036), respectively. …”
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4347
Neuromorphic system using capacitor synapses
Published 2025-01-01“…After all, electric charges in the multiple capacitances are summed and measured by the inverting intervals, which is the same as multiply–accumulate operation. …”
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4348
Emerging Stem Cell Therapies: Treatment, Safety, and Biology
Published 2012-01-01“…Hematopoietic stem cell transplantation was the first example of a successful stem cell therapy and is widely utilized for treating various diseases including adult T-cell leukemia-lymphoma and multiple myeloma. The autologous transplantation of mesenchymal stem cells is increasingly employed to catalyze the repair of mesenchymal tissue and others, including the lung and heart, and utilized in treating various conditions such as stroke, multiple sclerosis, and diabetes. …”
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4349
Hybrid precoding method for millimeter-wave massive MIMO systems based on IAFS algorithm
Published 2021-08-01“…The millimeter-wave massive multiple-input multiple-output (MIMO) systems can overcome the adverse effects of the free-space signal path loss through the partial connection hybrid precoding method, which has the advantages of low hardware complexity and high energy efficiency.When the number of input data streams is equal to the number of radio frequency (RF) links, the hybrid precoding method based on partially connected structure and serial interference cancellation can be used.When the number of input data streams is not equal to the number of RF links, a hybrid precoding method based on improved artificial fish swarm (IAFS) algorithm was proposed.The core idea is that based on the spectral efficiency optimization criteria and the characteristics of partial connected structure, the spectral efficiency optimization problem of analog recoding matrix variables was transformed into the spectral efficiency optimization problem based on vector variables, and then the IAFS algorithm was used to solve the spectrum efficiency optimization problem.The simulation results show that the proposed method has good spectral efficiency and energy efficiency under the condition of low signal-to-noise ratio, and is expected to be applied in the real scene.…”
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4350
A Case of Cachexia Secondary to Obsessive-Compulsive Disorder
Published 2020-01-01“…His resulting cachexia and eventual worsening of depression to the point of suicidality necessitated multiple inpatient stays and placement at a long-term mental health care facility.…”
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4351
Automatic Type Synthesis of Planar Kinematic Chain based on the Modified Assur-group Adjacency Matrix Theory
Published 2016-01-01“…Especially,the method can be applied to the automatic type synthesis for the planar mechanism kinematic chains with multiple links and multiple degrees of freedom. In addition,the success is achieved in the application on the type synthesis for the planar closed kinematic chains with 12 links and 12-below-links. …”
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4352
Integration of Heterogeneous Devices and Communication Models via the Cloud in the Constrained Internet of Things
Published 2015-10-01“…As the Internet of Things continues to expand in the coming years, the need for services that span multiple IoT application domains will continue to increase in order to realize the efficiency gains promised by the IoT. …”
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4353
Improved transmit beamforming design based on ADMM for low probability of intercept of FDA-MIMO radar
Published 2022-04-01“…Considering the low probability of intercept problem that the signal-dependent interference and the target were located in the same angle, an improved transmit beamforming design based on the alternating direction method of multipliers (ADMM) was proposed for multiple-input multiple-output with frequency diverse array radar.The transmit energy was minimized at the target under constraints of the energy at each transmitter and signal clutter-plus-noise ratio requirement.Subsequently, a cyclic algorithm was developed to tackle the non-convex design problem.Firstly, the optimal receive filter was obtained by generalized Rayleigh quotient.And then the transmit beamforming was optimized by employing auxiliary variables and ADMM to solve quadratic programming problem with fractional inequality constraint.Moreover, both the convergence and computational complexity of the proposed algorithm were discussed.Simulation results show that, compared with the semi-denite programming method, the proposed method not only attains the given antenna power, but also achieves the better mainlobe focusing performance at the target.Furthermore, the null levels at the clutter locations and the jamming directions obtained by the proposed method are -50 dB above.…”
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4354
Efficacy of plant extract in chronic low back pain: A meta-analysis
Published 2024-12-01“…One potential mechanism is through their interaction with multiple meridian pathways, which may enhance pain relief. …”
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4355
Federated learning-based user access strategy and energy consumption optimization in cell-free massive MIMO network
Published 2023-10-01“…To solve the problem that how users choose access points in cell-free massive multiple-input multiple-output (CF-mMIMO) network, a prioritized access strategy for poorer users based on channel coefficient ranking was proposed.First, users were evaluated and ranked for their channel quality and stability after channel sensing, and suitable access points were selected in sequence according to the order of the channel state information.Second, considering issues such as users' energy consumption and data security, a federal learning framework was used to enhance user's data privacy and security.Meanwhile, an alternating optimization variables algorithm based on energy consumption optimization was proposed to optimize the multi-dimensional variables, for the purpose of minimizing the total energy consumption of the system.Simulation results show that compared with the traditional user-centric in massive MIMO, the proposed access strategy can improve the average uplink reachable rate of users by 20%, and the uplink rate of users with poor channels can be double improved; in terms of energy consumption optimization, the total energy consumption can be reduced by much more than 50% after optimization.…”
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4356
Effects and optimization of pilot sequence length on rate in multiuser massive MIMO FDD system
Published 2018-07-01“…The effect of pilot sequence length on the asymptotic performance of the ergodic rate was investigated for the multiuser massive multiple-input multiple-output (MIMO) frequency division duplexing (FDD) downlink system.Firstly,the analytical expression of the ergodic rate was derived by using the principle of deterministic equivalence,based on which,it was discovered from the analytical results in two-fold that the normalized pilot sequence length (defined as the pilot sequence length divided by the number of BS antennas) tends to zero yet the rate was guaranteed to grow large without limit as long as the BS antenna number continues to increase,the rate saturates to a certain level if the BS antenna number becomes large with fixed pilot sequence length.Moreover,the pilot sequence length was optimized based on the sum-rate maximization within a finite channel coherence time,and a closed-form solution was deduced under a special correlated channel by means of Lambert W function.Simulation results validate the correctness of the theoretical analysis results and verify the effectiveness of the proposed closed-form solution of the optimal pilot sequence length.…”
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4357
Multipath inter-domain routing for named data networking
Published 2015-10-01“…To facilitate content retrieval among NDN domains,a multipath inter-domain routing for named data networking(MIRNDN)was proposed.Under MIRNDN,an AS(autonomous system)maintained merely the routing state of content reachable from its own network or from its customers’ networks and aggregated routing information to mitigate routing scalability issue; “valley free”routing policy was applied to guide Interest packets that solicit content unreachable from the AS’s own network nor from its customers’ networks to explore matching data packets via multiple paths,and NDN’s requests aggregation,in-network caching and adaptive forwarding optimized such exploration; the reachability information of content from multiple paths was collected to support Interest multipath forwarding.The properties of FIB size and the convergence time and communication cost of routing update under MIRNDN were analyzed in theory.The experimental results in the AS level topology of current Internet validates that MIRNDN mitigates the scalability issue of NDN inter-domain routing,has relative short convergence time and moderate communication cost for routing update,and effectively reduces unnecessary Interest forwarding.…”
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4358
Soil-Structure Interaction in Transversely Isotropic Layered Media Subjected to Incident Plane SH Waves
Published 2017-01-01“…Simultaneously, the corresponding peak frequency of the response increases. In multiple soil layers, the changes in the effective input motion and the superstructure response are also affected by the TI characteristics of the soil layers, and the impact of this effect is related to the sequence of the layers.…”
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4359
Sensory-Motor Polyneuropathy and Digital Ischemia: A Rare Presentation of Granulomatosis with Polyangiitis
Published 2021-01-01“…She had evidence of digital ischemia affecting multiple toes and dry gangrene of the left 4th toe. …”
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4360
LA PERSPECTIVA TRANSCOMPLEJA EN LOS MODELOS PEDAGÓGICOS Y SU APLICACIÓN EN LAS INSTITUCIONES DE EDUCACIÓN SUPERIOR
Published 2023-07-01“…Se basa en la teoría de la complejidad y busca la integración de múltiples perspectivas y disciplinas para abordar problemas y desafíos complejos. …”
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