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As one of the most widely implemented standards for wireless networks, IEEE 802.15.4 defines physical and MAC specifications for low data rate wireless personal area networks (WPANs). To accurately analyze the performance of slotted CSMA/CA (SCSMA) algorithms for saturated uplink traffic with acknowledgement (ACK) and non-ACK modes, we adopt an embedded(More)
As one of the most widely investigated topology control mechanisms of wireless sensor networks (WSNs), the clustering algorithm provides energy efficient communications by reducing transmission overhead and enhancing transmission reliability. Through the previous forms of noncooperative games, the behavior of each sensor node (SN) is individual in WSNs;(More)
To the Editor: Pulmonary nontuberculous mycobacteria (NTM) diseases share clinical signs with tuberculosis (TB), causing a clinical dilemma with regard to therapy for patients with these diseases (1). In the past 30 years (post-AIDS era), NTM have increasingly been associated with pulmonary diseases in humans (2). Recent studies in urban areas of the(More)
To estimate the prevalence of extensively drug-resistant tuberculosis (XDR TB) in China, we retrospectively analyzed drug-resistance profiles of 989 clinical Mycobacterium tuberculosis isolates. We found 319 (32.3%) isolates resistant to ≥1 first-line drugs; 107 (10.8%) isolates were multidrug resistant, of which 20 (18.7%) were XDR. XDR TB is of major(More)
A linear quantum dynamical theory for squeezing the output of the trapped Bose-Einstein condensate is presented with the Bogoliubov approximation. We observe that the non-classical properties, such as sub-Poisson distribution and quadrature squeezing effect, mutually oscillate between the quantum states of the applied optical field and the resulting atom(More)
New diagnostic methods have provided a promising solution for rapid and reliable detection of drug-resistant TB strains. The aim of this study was to evaluate the performance of the MeltPro TB assay in identifying multidrug-resistant (MDR-) and extensively drug-resistant tuberculosis (XDR-TB) patients from sputum samples. The MeltPro TB assay was evaluated(More)
BACKGROUND Nontuberculous mycobacteria (NTM) infection is an emerging, but neglected public health concern in China. FINDINGS To investigate diagnostic delay of NTM diseases in China, we analyzed 91 patients with pulmonary NTM infection in ShandongProvince. The median diagnostic delay time of the analyzed patients was 84 days, which was significantly(More)
The garbage crusher is one of the important parts in recoverable coal production line. To diagnose its faults during the working process, Back Propagation algorithm is used. However, it has some shortcomings, such as low precision solution, slow searching speed and easy convergence to the local minimum points. To overcome this problem, a novel method which(More)
There are many bridge-subgrade transition sections along Shuohuang Railway line. When the train passing through the section, dynamic effects between trains and track will increase greatly, the track will be damaged and the trains’ stability and safety will be impacted because of the stiffness difference in the junction between track and bridges.(More)
In this paper, we propose a novel 2-way handshake authentication protocol to locally authorize intra-domain roaming users for efficient authentication in mobile IP networks, which is based on authentication, authorization and accounting (AAA) architecture. The performance evaluation shows that our protocol outperforms the existing authentication protocols.