Polyfluoroalkyl chemicals (PFCs) present potential health risks due to their persistence and bioaccumulation. However, there is currently insufficient evidence regarding impact on cardiovascular disease (CVD). Consequently, it imperative investigate the correlation between PFCs CVD. The data was collected from National Health Nutrition Examination Survey in 2005-2012. Logistic regression models were employed assess association single PFC Generalized additive model (GAM) used for evaluating...

SUMMARY Fritillaria unibracteata var. wabuensis is an important resource plant for the famous traditional Chinese medicine Fritillariae cirrhosae bulbus (“Chuanbeimu” in Chinese). F. dried bulbs of several species from genus, with isosteroidal alkaloids components assumed as bioactive ingredients. However, biosynthesis pathway remains elusive. Here, we adopted a material to identify genes involved alkaloids. We first constructed multi‐tissue metabolome and transcriptome dataset ....

Background The relationship between per- and polyfluoroalkyl substances (PFAS) kidney function markers remains uncertain. Methods We used PFAS detection data from 5,947 adults in NHANES 2005–2012. employed multivariable linear regression models to examine associations estimated glomerular filtration rate (eGFR), urine creatinine (UCR), albumin (UAL), albumin/creatinine ratio (UACR). To capture non-linear trends, restricted cubic splines were applied. WQS (weighted quantile sum) Q-gcomp...

An effective approach to designing a tunable electromagnetic absorber is presented and experimentally verified; it based on an idea that existing frequency selective surface (FSS) regarded as loaded receiving antenna array. The effectively simplified by withdrawing half of the resistors; more compact one obtained when lumped capacitors are introduced. Building this, varactor-tunable with proper bias network proposed. Numerical simulations 1.6 mm in thickness show wide tuning range from 3.05...

In order to meet the QoS demand of time-sensitive information transmissions in airborne networks, a multi-priority differentiated and multi-channel MAC protocol based on adaptive jitter mechanism is proposed this paper. The provides services for different priorities by maximum stages. According continuous feedback channel occupation statistics, it has capability traffic load self-adaptability regulating stage transition probability. Using M/G/1/K queuing model stage, 2-dimensional Markov...

Named data networking (NDN) aims at efficient content delivery and reducing the redundancy of transmission. In NDN, one most important issues is how to utilize cached contents reduce user's response delay improve utilization cache resources. this paper, an intelligent discovery system fully resources, called DENA, proposed, which encompasses deep exponential network-based announcement exergy-based replacement algorithms. DENA provides shortcut paths for interest packets access targeted under...

Information-centric networking (ICN) aims to improve the efficiency of content delivery and reduce redundancy data transmission by caching contents in network nodes. An important issue is design methods with better cache hit rate achieve allocating on-demand. Therefore, an in-network scheduling scheme for ICN was designed, distinguishing different kinds dynamically size First discussing what appropriated be cached nodes, then a classification about could proposed. Furthermore, we use AHP...

The ectopic expression of the EsMYB90 transcription factor gene from halophytic Eutrema salsugineum has been reported to enhance level anthocyanin and other flavonoid metabolites in transgenic tobacco. In this study, wheat JW1 overexpressing showed longer roots higher fresh weight than that wild type (WT) under salt stress. addition, plants displayed significantly peroxidase (POD) glutathione S-transferase (GST) activity, as well markedly lower malondialdehyde (MDA) content WT during stress...

Traditional parameters estimation methods for the Multi-component Linear Frequency Modulation (MLFM) signal based on Fractional Fourier Transform (FRFT) could not achieve satisfactory precision and lesser computation cost. In this paper, we propose a new method combining Short Time (STFT) Zoom-FRFT, to estimate MLFM parameters. Firstly, coarse can be achieved from straight line detection of short time spectrum. Then, calculate analysis range transform order domain spectrum by FRFT...

Zn–MAPbBr 3 crystals exhibited an improved absorption capacity and better photocatalytic degradation performance toward RhB dye higher electrical conductivity a more positive Seebeck coefficient, compared with pristine MAPbBr sample.

A new technique for designing a varactor-tunable frequency selective surface (FSS) with an embedded bias network is proposed and experimentally verified. The FSS based on square-ring slot FSS. tuning achieved by inserting varactor diodes between the square mesh each unattached patch. divided into two parts biasing diodes. Full-wave numerical simulations show that wide range can be changing capacitances of these loaded varactors. Two homo-type samples using fixed lumped capacitors are...

Named Data Networking (NDN) as a promising future network architecture has been attracted lot of attention. In NDN, to keep fairness between flows and avoid congestion, one the most important issues is traffic control. Although some works have done solve control problem by controlling sending/forwarding Interest, best our knowledge, cooperation forwarding strategy largely ignored. Therefore, fill this gap, we propose an effective mechanism named Multi-path Flow Control(MFC) in paper. Our...

PDF HTML阅读 XML下载 导出引用 引用提醒 一种航空自组网中带差分服务的跳频MAC协议建模 DOI: 10.3724/SP.J.1001.2013.04335 作者: 作者单位: 作者简介: 通讯作者: 中图分类号: 基金项目: 国家自然科学基金(61202490);国防科技重点实验室基金(9140C020102110C0207) Media Access Control Protocol with Differential Service in Aeronautical Frequency-Hopping Ad Hoc Networks Author: Affiliation: Fund Project: 摘要 | 图/表 访问统计 参考文献 相似文献 引证文献 资源附件 文章评论 摘要:针对军事航空通信中部分信息传输对时效性和可靠性的严格要求以及传播时延不可忽略的问题,提出一种基于Turbo 编码、猝发技术、异步跳频和优先级区分的媒体接入控制协议(PFH_MAC).通过为高、低两种优先级分组提供不同的排队策略和接入网络权限,以提供差分服务能力.运用Markov...

With the prevalent adoption of blockchain in financial system, there has been an increase phishing scams on cryptocurrency platforms such as Ethereum, and effective anomaly detection method is urgently required. The latest studies have focused identification using natural language processing techniques or constructing simple static graphs. However, existing methods are insufficient to convey diversity connectivity patterns Ethereum transaction network concerning amount time. To this end, we...

A new approach called the robust structured total least squares (RSTLS) algorithm is described for solving location inaccuracy caused by outliers in single-observer passive location. It built within weighted (WSTLS) framework and improved based on estimation theory. Moreover, Danish weight function proposed according to extremal of WSTLS, so that can detect residuals reduce weights automatically. Finally, inverse iteration method discussed deal with RSTLS problem. Simulations show when...

This paper presents a fully distributed algorithm for target tracking using mobile sensor network. It tries to maintain the being visible network all time while consuming as little motion energy possible. Meanwhile connectivity is maintained. At every time, only nodes around are activated other keep idle. Certain functions defined quantify main aspects in such escaping probability and status. They transform into multi-objective optimization problem. To solve this global problem, local...

Channel quality parameters are needed to achieve efficient utilization of radio resources. These include channel amplitude gain, frequency offset, random phase, multipath as well noise variance. Usually, signal-to-noise ratio (SNR) at the demodulator output is used indicator link bit error rate (BER). In applications such power control, handoff, routing and adaptive transmission, SNR based in practical success. Previous works mainly for mobile or low speed vehicles, situation slow varying...

One varactor-tunable High Impedance Surface (HIS) is proposed and used in design of an active metamaterial absorber. The HIS structure based on mushroom-type HIS, which varactors are introduced to adjust the efiective capacitance tune resonance frequency. primary ground plane etched as bias network for these loaded varactors, another ultra-thin grounded sheet attached bottom. In addition, absorbing characteristics dielectric loss construct Numerical simulations show that a wide tuning range...