Based on orthogonal matrices, two constructions of Z-periodic complementary sequence set are introduced in this letter. The proposed approaches can provide flexible choices for the flock size set, which cannot be obtained by known methods. parameters resultant sets (M, N)PCS <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">M2</sub> <sup xmlns:xlink="http://www.w3.org/1999/xlink">NM1</sup> and N -1)PCS...

In this letter, a new class of almost binary sequence pairs with single zero element and three autocorrelation values is presented. The are based on cyclic difference sets set pairs. By applying the method to pairs, three-level constructed. It shown that from our constructions balanced or have optimal when characteristic sequences autocorrelations.

Abstract Phenology reflects the life cycle of vegetation, crucial for monitoring global vegetation diversity, ecosystem stability, and agricultural security. However, there is currently no dataset related to phenology. The 24 solar terms (24STs), based on Sun's annual motion, reflect changing seasons, temperature fluctuations, phenological phenomena. They serve as a vital means characterize This study generate Normalized Difference Vegetation Index (NDVI) product 24STs using Moderate...

Abstract Accurate prediction of potato yield is essential for informed agricultural decision-making, ensuring food security, and supporting farmers’ livelihoods. This particularly critical in regions like Prince Edward Island (PEI), where production not only a staple local agriculture but also cornerstone the regional economy, accounting significant proportion revenue employment. Although machine learning algorithms have been extensively applied prediction, previous studies fully leveraged...

Binary sequence pairs as a class of mismatched filtering binary sequences can be applied in radar, sonar, and spread spectrum communication system. with two-level periodic autocorrelation function (BSPT) are considered the extension usual function. Each BSPT consists two which all out-phase crosscorrelation functions, also called functions pairs, same constant. have an equivalent relationship difference set (DSP), new concept combinatorial mathematics, means that used to research kind...

Scene recognition is considered a challenging task of image recognition, mainly due to the presence multiscale information global layout and local objects in given scene. Recent convolutional neural networks (CNNs) that can learn features have achieved remarkable progress scene recognition. They two limitations: 1) receptive field (RF) size fixed even though may large-scale variations 2) they are computing memory intensive, partially representation multiscales. To address these limitations,...

This paper presents a new edge extration approach to detect moving vehicle in monocular video sequence. The extraction improves the tolerance of detection process toward variations illumination conditions and decreases influence cast shadows. In terms their information, based on calculating variance information nighttime algorithm will be introduced. Our method specifies rectangle area vehicles one-lane road which are able support real-time processing image sequences DSP.

In this letter, constructions of sequences with perfect odd autocorrelation and sequence sets zero correlation zone (ZOCZ) over the 8-QAM+ constellation are presented. Based on ternary sequences, ZOCZ constructed by using shift vectors mappings. These can be used in communication systems to achieve high transmission data rate (TDR) low interference.

In this letter, several new families of binary sequence pairs with period N=np, where p is a prime and gcd(n,p)=1, optimal correlation values 1 -3 are constructed. These classes based on Chinese remainder theorem. The constructed have optimum balance among 0's 1's.

This paper proposes a new construction method of binary sequence pair sets with zero correlation zone (ZCZ) in which the functions pairs are zero, based on difference set pair, concept combinatorial mathematics. With extension length, achieve theoretical upper bound. These ZCZ can be applied to generalized quasi-synchronous multiple-access system (QS-CDMA) reduce and eliminate multiple access interference co-channel interference.

Based on a ternary perfect sequence and binary orthogonal matrix, the Z-periodic complementary (ZPCS) sets over 8-QAM+ constellation are constructed. The resultant sequences can be used in multi-carriers code division multiple access (MC-CDMA) systems to remove interference increase transmission rate. proposed construction provides flexible choice for parameters so as meet different requirements application. A of shift is number 8-QAM ZPCS extended by changing sequences. As result, more...

Zero correlation zone (ZCZ) aperiodic complementary sequence (ZACS) sets have potential applications in multi-carriers (MC) CDMA communication systems, which can support more users than traditional sets. In this letter, methods for constructing ZACS based on orthogonal matrices are proposed. The new constructions may propose with optimal parameters. be applied approximately synchronized MC-CDMA to remove interferences.

The uniqueness of the binary sequence pair with two- level autocorrelation functions (BSPT) is put forward in paper and proved by using mathematic tools, which great importance guaranteeing receiving uniquely when applying BSPTs. Some construction methods BSPT are given. infinite families BSPTs presented given this paper.

In this letter, based on cyclic difference sets with parameters $(N,\frac{N-1}{2},\frac{N-3}{4})$ and complex transformations, a method for constructing degree-4 perfect Gaussian integer sequences (PGISs) good balance property of length $N'\equiv2(\text{mod}4)$ are presented. Furthermore, the elements distribution proposed (GISs) is derived.

Abstract Human action recognition based on graph convolutional networks (GCNs) is one of the hotspots in computer vision. However, previous methods generally rely handcrafted graph, which limits effectiveness model characterising connections between indirectly connected joints. The limitation leads to weakened when joints are separated by long distances. To address above issue, authors propose a skeleton simplification method aims reduce number and distance merging adjacent into simplified...