The Orthogonal Approximate Message Passing (OAMP) algorithm enhances performance and stability remarkably by integrating orthogonalization, it exhibits excellent detection even in ill-conditioned channel environments. However, the high implementation complexity of OAMP algorithm, mainly caused computation decorrelated matrix linear estimation segment, poses a problem. To address this issue, we propose low-complexity paper. Relying on sparsity matrix, new simplifies complex calculations...

As a key global food reserve, rice disease detection technology plays an important role in promoting production, protecting ecological balance and supporting sustainable agricultural development. However, existing identification techniques face many challenges, such as low training efficiency, insufficient model accuracy, incompatibility with mobile devices, the need for large number of datasets. This study aims to develop that is highly accurate, resource efficient, suitable deployment...

Enabling completely universal coverage, the space-ground communication system integration is one of most important aspects in fifth generation (5G) or even next 6G wireless communications, which significantly benefits railways whose transportation lines always cross diverse environments. Based on this observation, to achieve seamless coverage for environment-diverse high-speed (HSRs), by leveraging control/user-plane (C/U-plane) decoupling and cloud radio access network (C-RAN) technologies,...

Traffic flow optimization and trajectory guidance in merging zones have significant implications for improving capacity reducing time consumption. The development of V2X communication provides new insights to solve this problem by tackling the information releasing trajectories schemes. Therefore, paper aims discuss management zone ACC vehicles. A vehicle dispatching car-following model is proposed generate steady traffic first. An algorithm framework consecutive presented with idea FIFO...

Wireless traffic prediction plays an important role in network planning and management, especially for real-time decision making short-term prediction.Systems require high accuracy, low cost, computational complexity methods.Although exponential smoothing is effective method, there a lack of use with cellular networks research on data traffic.The accuracy suitability this method need to be evaluated using several types traffic.Thus, study introduces the application as adaptive forecasting...

Recent advancement in vehicular wireless applications is also a major contributing factor spectrum scarcity. Cognitive radio technique applied to Vehicular Ad hoc Networks (VANETs) increase frequency bandwidth. Fast and reliable detection of primary user the key component cognitive networks. Energy (ED) based sensing viable choice for vehicle communications due its simplicity, low computational cost ability be on any kind deterministic signal. This paper examines performance using energy...

Stability analysis and benefit estimation have substantial implications for lane-change decision-making to reduce delay variation. Connected platoons drive with minor headway increase capacity, whereas dividing or reforming significantly impacts traveling efficiency. Therefore, this article focuses on the instability of platoon caused by an en-route lane-change. Construction forming, combination rules, car-following models various vehicle types are presented describe driving behaviours....

An explosive growth in vehicular wireless applications gives rise to spectrum resource starvation. Cognitive radio has been used networks mitigate the impending starvation problem by allowing vehicles fully exploit opportunities unoccupied licensed users. Efficient and effective detection of user is a critical issue realize cognitive applications. However, sensing environments very challenging task due vehicle mobility. For instance, mobility large effect on channel, thereby impacting...

Abstract The interfacial cracks generated during the high‐temperature carbonization process, caused by mismatch of thermal shrinkage rate between fiber and matrix, limit huge application potential C/C composites. In this study, pre‐oxidized carbon (OPF) prepared from pitch, as a reinforcement, was introduced into pitch‐based matrix to realize co‐carbonization OPF pitch. results showed that mechanical properties OPF‐reinforced composites were significantly improved. compressive strength...

Sequences with good correlation properties are of substantial interest in many applications. By interleaving a perfect array shift sequences, new method constructing binary set zero zone (ZCZ) is presented. The operation can be performed not only row-by-row but also column-by-column on the array. resultant ZCZ optimal or almost respect to theoretical bound. provides flexible choice for rectangular and size.

In this paper, two deep ensemble algorithms, the hierarchical and multi-stage feature fusion(HMSFF) Cooperative decision(Co_decision), are designed for specific emitter identification(SEI). Extracting differential constellation trajectory amplitude, energy spectrum as well symmetry radio frequency fingerprint features, proposed algorithms exhibit better recognition accuracy robustness to time variation than existing researches. Furthermore, in case of small number training samples data...

Aperiodic quadriphase Z-complementary sets (QZCS), which include the conventional complementary as special cases, are introduced. It is shown that, aperiodic pairs normally better than binary ones of same length in terms number pairs, and maximum zero correlation zone (Z <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">max</sub> ). The new notions elementary transformations on sequences operations QZCS brought forward. In particular, methods for...

Spectrum starvation is a key challenge for wireless services and applications in vehicular networks with serious negative implications traffic safety transportation efficiency. As promising solution, cognitive radio (CR) allows CR-enabled vehicles to access the spectrum holes of primary users (PUs) an opportunistic manner, but requires robust sensing mechanism provide adequate protection PUs. However, highly dynamic environments make increasingly difficult problem. For example,...

In this paper, a systematic experimental investigation concerning the fretting wear behavior of Ti6Al4V titanium alloy under nitrogen, argon and air atmospheres is reported. An in-situ XPS analysis test combined with self-designed high precision tester was employed to probe tribo-chemical state. The volume mechanism different were analyzed correlations state discussed. Results suggest that working atmosphere has significant effect in determining formation products on worn scars then...