bluuebunny/crossref_metadata_2025 huggingface dataset:
Controlling self-healing of optical field based on moiré dual-microlens arrays
Authors: Li Dongwei , Wang Weiming , Gao Song , Gao Yuanmei , Cai Yangjian , Hao Zuoqiang , Wen Zengrun
Published: August 2023

Optical self-healing is a repairing phenomenon of a beam in the propagation, as it is perturbed by an opaque object. In this work, we demonstrate experimentally and theoretically that the moiré distributed dual-microlens array enables to generate optical fields with better healing ability to withstand defects than their counterparts of a single microlens array. By utilizing the double parameter scanning method, the self-healing degree of the optical field is significantly affected by both the interval distance and the relative angle of the dual-microlens arrays. The self-healing level is decreased significantly by lengthening the interval between the two microlens array with a small twist angle, while increasing the angle enhances the self-healing degree. Further study manifests the self-healing process with respect to the size and central location of the obstacle. The research results provide a simple and effective method to generate self-healing optical wave fields, which have potential applications including optical communication, assisted imaging technology, and even intense laser physics.
Half metallicity and optical properties of Ba2B′ReO6 (B′ = Cd, Er): a DFT insight
Authors: Kazim Muhammad Zafarullah , Ishfaq Mudassir , Aldaghfag Shatha A , Younis Umer , Yaseen Muhammad
Published: August 2023

Barium based double perovskite rhenates are being comprehensively studied due to their diverse magnetic behaviors, extending from ferri- to (anti) ferro-magnetism which is mostly influenced by theoretical Hubbard interaction parameter (U). Therefore, density functional theory (DFT) and U are brought together to reveal the origin of half metallicity with ferromagnetic ordering in Ba2CdReO6 and ferrimagnetism in Ba2ErReO6. The precise estimation of exchange correlation energies has been performed with generalized gradient approximation (GGA). In both compounds, the 100% spin polarization at Fermi level arises primarily due to Re-d orbitals and minute involvements from respective Cd/Er cation’s valence orbitals along with total magnetic moment values of ∼1.0 μ

B
. Moreover, in optical response, ample amount of absorption and optical conductivity is observed in the UV region of both DPs. The thermo-structural stability of Ba2B′ReO6(B′ = Cd, Er) along with 100% spin polarization and superior optical properties make these DPs the potential candidate for various spin-optoelectronic devices e.g., spintronic devices and optical filers.
Super wideband with band rejection characteristics circular patch monopole antenna for 5G and beyond
Authors: Lakshmaiah Y Venkata , Roy Dr Bappadittya
Published: August 2023

A super wideband monopole antenna design for microwave and advanced wireless applications in the frequency range of 2.2 GHz to 27.06 GHz. At first, a circular resonator with a ring dimension is used to achieve a wideband range of frequency with a band rejection characteristic in the lower band. Where the antenna provides broadband from 2.2 GHz to 27.06 GHz with four notch bands covering 12.26–14.44 GHz, 17.39–19.60 GHz, 2.69–4.36 GHz, and 5.5–7.14 GHz. These notch band frequencies are productively used to evacuate undesired interference of different wireless frequencies. Additionally, six symmetrical tiny circle stubs are introduced in the ground plane to improve the overall characteristic without notch bands. The combination of the ring patch with the line feed broadens the stable radiation, super bandwidth, and stable gain characteristics. The overall electric size of the antenna is

0.41
×
0.35
×
1.52

λ

0

3

where the maximum gain is 6.4 dBi in between the higher frequency band and 4 dBi from 2.6–5.7 GHz. The proposed antenna exhibits a novel structure and achieves a wide bandwidth without using any external electronics components. The overall fractional bandwidth is more than 166% and excellent performance enters the wireless frequency band. The proposed structure was designed and fabricated to be experimentally validated and could be applied in various wireless components and applications.
Efficient fault-tolerant quantum dialogue protocols using a quantum reordering circuit of EPR pairs
Authors: Lin Jason , Chang Chen-Yu
Published: August 2023

This study proposes two efficient fault-tolerant quantum dialogue (QD) protocols that are robust against the collective-dephasing and collective-rotation noises, respectively. In the proposed protocol, the message carriers are decoherence-free quantum states that are resistant to the corresponding collective noise, provided that all quantum photon pairs of a transmitted unit remain within the same time window. These quantum states and their combinations are used to compose the decoy photon pairs to ensure the security of the transmission. An observation on the Bell measurement has allowed an EPR pair as a message carrier to Require only one of its photons for protection. That is, the measurement of one single photon in an EPR pair will gain no information on its actual Bell state. This property has effectively reduced the number of decoy photons in quantum transmission. Since the photons used in the message carriers are particles of EPR pairs, the proposed two fault-tolerant QD protocols required only half of the decoy photons to ensure the same level of security. In the transmission, one photon of each EPR pair is separated using a reordering mechanism, and a quantum logic circuit is designed and implemented to demonstrate the concept in practice. The reduction of decoy photons has significantly improved the qubit efficiency of the proposed QD protocols compared with other relevant existing works. Furthermore, the proposed schemes also have no information leakage problem.
The effect of aluminide coating on the steam oxidation behavior of SS321 steel at 700 °C
Authors: Shirvani Kourosh , Taheri Morteza , Hadadipour Khalilullah , Javadpour Sirus
Published: August 2023

Steam oxidation is considered the main attack form involved in the destruction of superheater tubes in the superheater of water-tube boiler. In this work, the effect of an aluminide coating on the way steam reacts with SS321 steel in a superheater was studied. Aluminide coating was done by powder cementation at 800 °C for 7 h and then heat treatment at 900 °C for 1 h. The coating was made with an Al-rich Fe2Al5 phase, with an inner (diffusion) layer of 5 μm and an outer layer of 25 μm. The grains were all the same size, and there were few holes. The samples were subjected to a constant stream of supersaturated water vapor at a temperature of 700 °C. The weight gain of uncoated and coated samples was measured as 1 mg cm−2 and 0.5 mg cm−2 after 20 h, and 2.5 mg cm−2 and 0.7 mg cm−2 after 350 h, respectively. The remarkable weight loss of the coated samples after 20 h and up to 350 h was attributed to the formation of stable Al2O3 oxides. This was although in the uncoated samples, the outer and inner layers of the coating were composed of Fe-rich oxides (magnetite) and Cr-rich oxides (Cr-Fe spinel oxides), respectively. Microstructural studies showed that with the increase in oxidation time, the inner layer (diffusion) increases from 5 μm to 25 μm, which is attributed to the diffusion of substrate particles towards the coating during oxidation.
Novel (1-x)MgCu2Nb2O8− xTiO2composite ceramics with high Q×f and near-zero τf
Authors: Peng Sen , Li Chen , Yan Tianyi , Huang Shengxiang , Qiu Leilei , Deng Lianwen
Published: August 2023

For the MCu2Nb2O8(M=Ca, Mg, Zn or Ni) composite ceramics, it is still a difficult problem to achieve both highQ×fvalule and near-zero temperature coefficient of resonant frequency (τf). In this paper, the (1-x)MgCu2Nb2O8−xTiO2(0 ≤x≤ 0.28) ceramics were fabricated by the two-step sintering (TSS) technique. Results of x-ray diffraction (XRD) and Raman spectroscopy proved that the ceramic samples were composite phases of MgNb2O6, CuO and TiO2. The chemical compositions and valences of Mg, Cu, Nb, O and Ti were investigated by x-ray photoelectron spectroscopy (XPS). Scanning electron microscopy (SEM) showed that proper TiO2addition could promote growth of grains and increase the average grain size. Appropriate TiO2content and enhanced densification contributed to the 0.84MgCu2Nb2O8− 0.16TiO2ceramics sintered at 935 °C withεr= 18.75,Q×f= 34,398 GHz (f0= 7.8 GHz), andτf= −0.56 ppm/°C, exhibiting potential applications in Low Temperature Co-fired Ceramic (LTCC) devices.
Two-component generalized nonlinear Schrödinger equations and their soliton and breather solutions
Authors: Li Xinyue , Zhao Jiale , Zhao Qiulan
Published: August 2023

In this paper, a cluster of two-component generalized nonlinear Schrödinger equations is generated in terms of zero-curvature equation and polynomial expansion of the spectral parameter, which can be used to illustrate effects on various nonlinear phenomena. After that, explicit representations of classical Darboux transformation and generalized perturbation (n,M)-fold Darboux transformation of the above equations are constructed. Localized wave solutions including soliton solutions, degenerate soliton solutions, soliton solutions interacting with degenerate soliton solutions, breather solutions and degenerate breather solutions are subsequently acquired via the classical Darboux matrix. Meanwhile, degenerate soliton solutions are acquired by the generalized perturbation (n,M)-fold Darboux transformation. Analyses of these solutions are shown through a series of figures ultimately.
Phase transition of polarons in bilayer graphene nanoribbons
Authors: de Sousa Araújo Cassiano Tiago , Magela e Silva Geraldo , de Oliveira Neto Pedro Henrique
Published: August 2023

Stacking graphene nanoribbons (GNRs) is the natural path to obtain semiconductors with exotic quantum phenomena by manipulating the interlayer coupling. Recently, a report demonstrated that, during charge transport, interlayer coupling significantly affects the phonon breathing modes. Therefore, a reliable physical description of charged carriers must explicitly address the coupling nature of the electronic and lattice phenomena. In this work, we gauge the influence of interlayer coupling (t
⊥) on the formation of charged carriers in a bilayer of an armchair graphene nanoribbon using a model Hamiltonian with electron-phonon coupling. We find different quasiparticle solutions depending on the t
⊥ magnitude. As it increases, the carrier’s charge progressively delocalizes along the layers, resulting in two interlayer polaron morphologies: the non-symmetric (0 meV <t
⊥ ≤ 45 meV) and the symmetric (t
⊥> 45 meV). These solutions also manifest in the band structure through first-order electronic phase transitions in the intragap states with a significant energy shift of about 0.3 eV. Consequently, the carrier’s mobility and effective mass are expected to be highly sensitive to t
⊥, suggesting that mechanical stress can regulate the mechanism. The findings extend to other GNR bilayers, potentially inspiring the development of novel nanoelectronics based on highly confined stacked systems.
Exploring the second-order polarizability of copper doped silicon carbide nanocluster: toward a new NLO material
Authors: Yaqoob Junaid , Tabassum Sobia , AlMohamadi Hamad , Mahmood Tariq , Ayub Khurshid , Khan Asim Laeeq , Yasin Muhammad , Gilani Mazhar Amjad
Published: August 2023

Nonlinear optical materials are widely used in optical and optoelectronic devices. The geometric, electronic, and NLO properties of copper-doped 2D silicon carbide nanoclusters (Cu@h-SiC) are investigated. The HOMO–LUMO gap (Eg) of the h-SiC nanocluster is significantly decreased by copper atom doping. All the isomers (A to G) showed a marked drop in Eg values. It is noticed that the Eg value decreased up to 46% of the original value. The partial and total density of state graphs for all seven structures indicate the emergence of new HOMOs between the frontier molecular orbitals of h-SiC. The isomer A exhibits a significant increase in polarizability (α = 669 au) and hyperpolarizability (βo = 9.395×10−29 esu) values compared to pure h-SiC. Global reactivity descriptors (IP, EA, and S) and low excitation energies endorse the enhanced NLO response of Cu@h-SiC. The EDDM (Electron density difference map) analysis is performed to gain insight into the electronic density differences at the ground and excited levels. QTAIM analysis is used to investigate the type and nature of the interaction between the Cu-atom and the h-SiC. TD-DFT calculations predict the absorption spectra in the visible and near-IR regions. This study may help in the fabrication of h-SiC-based materials with optimised NLO response.
Identification of Blue Horizontal Branch Stars with Multimodal Fusion
Authors: Wei Jiaqi , Jiang Bin , Zhang Yanxia
Published: August 2023

Blue Horizontal Branch stars (BHBs) are ideal tracers to probe the global structure of the milky Way (MW), and the increased size of the BHB star sample could be helpful to accurately calculate the MW’s enclosed mass and kinematics. Large survey telescopes have produced an increasing number of astronomical images and spectra. However, traditional methods of identifying BHBs are limited in dealing with the large scale of astronomical data. A fast and efficient way of identifying BHBs can provide a more significant sample for further analysis and research. Therefore, in order to fully use the various data observed and further improve the identification accuracy of BHBs, we have innovatively proposed and implemented a Bi-level attention mechanism-based Transformer multimodal fusion model, called Bi-level Attention in the Transformer with Multimodality (BATMM). The model consists of a spectrum encoder, an image encoder, and a Transformer multimodal fusion module. The Transformer enables the effective fusion of data from two modalities, namely image and spectrum, by using the proposed Bi-level attention mechanism, including cross-attention and self-attention. As a result, the information from the different modalities complements each other, thus improving the accuracy of the identification of BHBs. The experimental results show that the F1 score of the proposed BATMM is 94.78%, which is 21.77% and 2.76% higher than the image and spectral unimodality, respectively. It is therefore demonstrated that higher identification accuracy of BHBs can be achieved by means of using data from multiple modalities and employing an efficient data fusion strategy.
Aberrant accumulation of age- and disease-associated factors following neural probe implantation in a mouse model of Alzheimer’s disease
Authors: Wellman Steven M , Coyne Olivia A , Douglas Madeline M , Kozai Takashi D Y
Published: August 2023

Objective. Electrical stimulation has had a profound impact on our current understanding of nervous system physiology and provided viable clinical options for addressing neurological dysfunction within the brain. Unfortunately, the brain’s immune suppression of indwelling microelectrodes currently presents a major roadblock in the long-term application of neural recording and stimulating devices. In some ways, brain trauma induced by penetrating microelectrodes produces similar neuropathology as debilitating brain diseases, such as Alzheimer’s disease (AD), while also suffering from end-stage neuron loss and tissue degeneration. The goal of the present study was to understand whether there may be any parallel mechanisms at play between brain injury from chronic microelectrode implantation and those of neurodegenerative disorder. Approach. We used two-photon microscopy to visualize the accumulation, if any, of age- and disease-associated factors around chronically implanted electrodes in both young and aged mouse models of AD. Main results. We determined that electrode injury leads to aberrant accumulation of lipofuscin, an age-related pigment, in wild-type and AD mice alike. Furthermore, we reveal that chronic microelectrode implantation reduces the growth of pre-existing Alzheimer’s plaques while simultaneously elevating amyloid burden at the electrode-tissue interface. Lastly, we uncover novel spatial and temporal patterns of glial reactivity, axonal and myelin pathology, and neurodegeneration related to neurodegenerative disease around chronically implanted microelectrodes. Significance. This study offers multiple novel perspectives on the possible neurodegenerative mechanisms afflicting chronic brain implants, spurring new potential avenues of neuroscience investigation and design of more targeted therapies for improving neural device biocompatibility and treatment of degenerative brain disease.
A scaling function for the particle entanglement entropy of fermions
Authors: Radhakrishnan Harini , Thamm Matthias , Barghathi Hatem , Rosenow Bernd , Del Maestro Adrian
Published: August 2023

Entanglement entropy under a particle bipartition generates complementary information to mode entanglement because it is sensitive to interactions and particle statistics at leading order and does not depend on any externally imposed length scale. In this paper, we investigate the particle entanglement entropy in a system of N interacting spinless lattice fermions in one spatial dimension by combining bosonization techniques with exact and approximate numerical methods. We introduce a general scaling form for the fermionic particle entanglement entropy captured by a shape function that enters as an extensive interaction-induced correction to a known free fermion result. A general asymptotic expansion in the total number of particles demonstrates that its form is robust for different values of the Rényi index and highlights how quantum correlations are encoded in the n-particle density matrix of a pure many-body quantum state.
Experimental Research of the Identification of Topological Charges for Vortex Beams
Authors: Luo Qing , Cai He , Xing Hao , An Guofei , Wang Dongdong , Yang Xi , Wang You
Published: August 2023

An optical vortex beam has attracted more and more attention in several fields such as optical communication and quantum information. Generally, the vortex beam carries orbital angular momentum (OAM) and the topological charges (TCs). Measuring and identifying TCs of vortex beams is a key issue in many applications. In this study, the polarization status has been introduced into the interferometric procedure for identifying TCs of vortex beams. The influence of polarization states on the TC identification has been demonstrated experimentally. Furthermore, we demonstrate the satisfactory robustness for the interferometric method during identifying the TCs of vortex beams. When the reference and signal beam do not perfectly overlap in a Mach-Zehnder (M-Z) interferometer, i.e. there is a small tilt angle between two beams, a petal-like interference pattern can still be maintained with good visibility and be used for estimating the magnitude and sign of the TC. Our results might provide reference significance for the long-distance optical communication using vortex beams in the near future.
Effect of micro steel fibre contents on compressive and self-sensing properties of polyethylene fibre-reinforced cement composite (PE-FRCC) in cyclic compression
Authors: Yun Hyun-Do , Choi Won-Chang , Park Wan-Shin , Jin Ai-Hua , Kim Yong-Chul , Seo Soo-Yeon
Published: August 2023

This study is conducted to develop a cement-based strain-detecting sensor with high cost-effectivity, large strain measuring range and good compatibility with concrete infrastructures. The paper describes experimental results on the compressive properties and piezoresistive behaviour of polyethylene(PE) fibre-reinforced cement composite(PE-FRCC) with different contents of micro steel fibres (SFs) under cyclic compression. The synthetic PE fibres were added into cement-based mortar to improve the strain capacity in compression and micro SFs at 0.25-1.5% by volume fraction of cement were incorporated to improve the compressive properties and electrical conductivity. Test results show that for the PE-FRCC with compressive strength of 32MPa, the increase in the micro SF content to 0.5% increased about 45% in the compressive strength compared to PE-FRCC without SFs. The addition of micro SFs into PE-FRCC improved the compressive properties, such as modulus of elasticity and lateral confinement. The incorporation of micro SFs is also effective to reduce the signal noise in the relationship between fractional change in resistance (FCR) and axial strain of PE-FRCC. PE-FRCC sensor with more 1.0% micro SF (PE0.75+SF1.00 composite) possess a strong linear relationship between FCR and axial strain during repeated compression at different stress amplitudes.
Internet of Things Horizontal Platform Development for Expanded Application Scenarios and Use Cases
Authors: Ganchev Ivan , Ji Zhanlin , O’Droma Máirtín
Published: August 2023

This paper presents the horizontal approach for the development of Internet of Things (IoT) platforms, based on a generic, multi-service, cloud-based IoT operational platform, called EMULSION, elaborated for the rapid development of mobile IoT systems and quick roll-out of corresponding IoT services. The platform is successfully used as a basis for the development of various IoT prototype systems for different IoT domains, such as smart environment control, smart health, smart electric appliances, smart water supply, etc. As an example of these, a ground surface displacement monitoring IoT system, operating in the area of smart environment control, is presented, along with aspects of the hardware design of the produced low-cost, small-size, global navigation satellite system (GNSS)-based sensor unit, utilized by it. The system architecture design is set out, supplemented by the presentation of initial test results.
The Broadband Emitting and Lattice Occupation Analysis of Eu2+, Eu3+ and Ce3+ co-doped K3YSi2O7 Phosphors
Authors: Chen Yuhui , Fan Pu , He Xiao , Liu Xiaoguang , Li Ling
Published: August 2023

Eu3+, Eu2+ and Ce3+
doped K3YSi2O7 phosphors are synthesized under reducing atmosphere. Photoluminescence properties show K3YSi2O7:1%Ce, 1%Eu at 330 nm excitation (FWHM = 211 nm, where FWHM stands for the full width at half maximum) can produce broadband emission. The preferential occupation sites of Ce and Eu ions in K3YSi2O7 are calculated using the bond energy theory. Eu2+, Eu3+, Ce3+ ions preferentially occupy K3, Y2, K1 sites, respectively. The broadband emission of the phosphor is caused by the dopant ions’ selective site occupancy.
Broadband absorption based on multi-layered ENZ film: from directional to omnidirectional absorption
Authors: Li Jiacheng , Liu Shuang , Wu Shenglan , Li Wei , Liu Yong , Zhong Zhiyong
Published: August 2023

We propose a flat multilayered structure fabricated from gradient epsilon-near-zero (ENZ) materials (SiO2/Si3N4/Al2O3/AlN/TiO2/α-Ta2O5) coated on aluminium (Al) that enables broadband directional control of infrared absorption and adopt the Particle Swarm Optimization (PSO) method to optimize its structural parameters. The results demonstrate that the absorbers can exhibit high absorption (> 0.6) at specific angles (60° to 80°) and near-unity omnidirectional (0° to 80°) absorption both in p-polarization with covering the entire long-wavelength infrared (LWIR) range (8 μm to 14 μm), respectively. The directional control of the absorption with high efficiency and wide bandwidth would be great potential in applications such as thermal imaging, infrared camouflaging, and radiative cooling.
Electrical Properties of Strain-Hardening Cement Composite (SHCC) with Multi-Walled Carbon Nanotubes Exposed to High temperature up to 900 °C
Authors: Jeong W J , Wang Q , Yun H D , Seo S Y
Published: August 2023

Cement-based sensors mixed with carbon nanotube (CNTs) for structural health monitoring were studied to detect changes in electrical resistance under the influence of temperature, pressure, and mass. Strain-hardening concrete composite mixed with CNT was heated to 900 °C to analyze the electrical resistance characteristics at high temperatures. The temperature and electrical resistance were measured using a thermocouple and an LCR meter during the heating and cooling processes. The resistance trend changed between 300 and 400 °C during the heating process, after which the resistance change rate with respect to temperature decreased. At 700 °C or higher, the resistance became larger as the initial resistance increases. In the cooling process, when the temperature dropped below 700 °C, a rapid change in resistance was observed, and the resistance began to drop sharply between 500 °C and 600 °C to become negative resistance. Following this, self-sensing ability decreased owing to changes in the resistance with respect to temperature. Multi-walled carbon nanotubes could not be distinguished by scanning electron microscope imaging after heating.
Application of Big Data and Artificial Intelligence in Substation Operation and Maintenance
Authors: Yang Lin , Li Wenwen , Zhang Su , Wan Jia , Zhao Hongbo
Published: August 2023

In order to solve the problem that a large amount of equipment data obtained in the operation and maintenance work of substations is not fully utilized, this paper mainly analyzes and processes the data obtained by operators from the site by combining data mining technology. The first is to use the trend extrapolation method for data fitting to guide equipment maintenance; The second is to use multiple linear regression method to analyze the influencing factors of equipment status and carry out defect prediction and fault diagnosis; Third, by analyzing the predictability of DGA data, the prediction method based on the maximum Lyapunov index is used to predict the dissolved gas in the oil, so as to judge the operation status of the transformer and the occurrence of the fault through the analysis of DGA prediction data, and realize the prediction of the transformer fault. Reasonable use of big data technology and artificial intelligence technology can greatly improve the intelligent level of substation operation and maintenance work, thus optimizing the allocation of human resources, and making the work more accurate and efficient.
Weighted Fuzzy Markov Chains for Regions Research on Rainfall Forecasting
Authors: Huang Xuan , Liu Xiaotong , Zhang Chunfu
Published: August 2023

The problem of rainfall prediction is of great importance for the study of the hydrological cycle of a watershed or region in China. Since rainfall series are not periodic as well as linear, rainfall series are measured based on Markov’s theorem, and the percentage of precipitation distance is used to classify the historical data. The traditional Markov chain was optimized and a weighted-fuzzy Markov rainfall prediction model was established. The results show that the average absolute error of the two prediction samples is 2.09%, except for 2019, when the rainfall in Guangzhou City is different from the past, and the model has high accuracy, which has good practical significance and extension value.
UAV Formation Adjustment Strategy Based on Greedy Criterion
Authors: Wang Yiru , Zhang Bo , Yang Huibing , Tang Zichun , Li Hanxu , Liu Xuanlin
Published: August 2023

In order to ensure that the UAV cluster remains electromagnetically silent during the attempted formation flight, so that the emission of electromagnetic wave signalsj is minimised, a purely azimuthal passive positioning method can be used to adjust the position of the UAVs. As it is difficult to keep the UAVs in formation flying on the same horizontal plane for a long time and the initial position information of the UAVs is not known. Therefore, this paper uses the sine and cosine theorems of in-plane triangles to connect slightly deviating UAVs to a determined UAV position, and in combination with the characteristics of the model, constructs a greedy criterion based on the minimum number of UAVs required to transmit the signal, and in this way gives an adjustment scheme for the UAV position.
Unsupervised Anomaly Detection of Subway Vibration Signal Based on Ultra-weak FBG Sensing Array Combined with RCMDE and Local Density
Authors: Yang Yan , Yin Qianru , Yue Lina
Published: August 2023

The subway vibration signal can reflect the health status of the passing train and tunnel structure. Identifying the abnormal vibration signal is a prerequisite for safe subway operation. In view of the difficulties in collecting anomalous samples in actual engineering and extracting effective features of high-dimensional time series, an unsupervised anomaly detection approach on the ground of RCMDE and local density has been put forward to identify vibration signals captured by the ultra-weak FBG sensing array cable. Two experiments demonstrated that compared with other methods, RCMDE could better evaluate the signal and extract features more precisely and that the abnormal vibration signals of passing trains consistent with the facts were accurately detected by the proposed method while other methods had errors.
Multi-objective Logistics Distribution Path Optimization Based on Annealing Evolution Algorithm
Authors: Zeng Xinzhu , Wang Yiding
Published: August 2023

Logistics distribution is a collection of interrelated organizations and facilities. There is a waste of cost and time in many links. Therefore, it is particularly important to use information technology to improve distribution efficiency. Under the constraints of delivery vehicle cost and time, this paper proposes an improved genetic simulated annealing algorithm (SAGA), which combines the global search ability of the genetic algorithm (GA) and the simulated annealing algorithm (SA) with strong local search ability to solve the vehicle routing problem with time windows (VRPTW). The perturbation factor is introduced to improve the local search, and the crossover method is optimized to obtain more efficient genetic operators by using population information. In this paper, combined with the actual application case, the simulation experiment is carried out in MATLAB. The experimental results show that, compared with the traditional genetic algorithm and simulated annealing algorithm, the total cost of the improved genetic simulated annealing algorithm is reduced by about 15%, which provides a more suitable vehicle route planning scheme.
Betti Number for Point Sets
Authors: Wang Hao
Published: August 2023

Topology is the foundation for many industrial applications ranging from CAD to simulation analysis. Computational topology mostly focuses on structured data such as mesh. However, unstructured datasets such as point sets remain a virgin land for topology scientists. The significance of point-based topology can never be overemphasized, especially in the area of reverse engineering, geometric modeling, and algorithmic analysis. In this paper, we propose a novel approach to compute the Betti number for point set data and illustrate its usefulness in real-world examples. To the best of our knowledge, our work is pioneering and the first of its kind in the field of computational topology.
Application of k-sigma Algorithm Based on Monte Carlo in Outlier Detection
Authors: Chen Xingyan , Ding Zhengsheng
Published: August 2023

Under the background of intelligent times based on information technology, the analysis and replacement of outliers become particularly critical for databases in the face of massive sequential data streams. In order to improve the effectiveness and practicability of the detection method, this paper determines the abnormal scores of data points in a specific data set by using the K-Sigma algorithm of the Monte Carlo method, adaptively adjusts the k value according to the abnormal scores, and marks the abnormal points.

The advantages of the traditional k-sigma algorithm are fast operation speed and theoretical basis, while the disadvantages are that each index dimension is determined independently. However, in industrial production, due to the multi-index dimension of time series data, multiple size indicators of a data set are related to each other. Therefore, it is necessary to comprehensively consider whether an anomaly is abnormal by combining it with the data of other indicators. In addition, when there are no outliers in the data set, the traditional k-sigma algorithm is used to take the mean and variance of the data set as parameters. Due to the limitations of the data set itself, some data points will be mislabeled as outliers. Through the k-sigma algorithm based on the Monte Carlo method, we can effectively solve the above problems.

The k-sigma algorithm based on the Monte Carlo method can generate a normal distribution according to the distribution of original data points, and extract a large quantity of data from the distribution to generate Monte Carlo data set. The Mahalanobis distance li
from each sample point to the mean in the Monte Carlo data set is calculated and compared with the Mahalanobis distance lj
from the samples to be detected to the mean in the original data set. According to the number of sample points satisfying li
< lj
in the Monte Carlo data set, the value of the parameter kj
is determined adaptively, and thus the outliers are determined. We implemented the k-sigma algorithm based on the Monte Carlo method through python, evaluated the effectiveness of the algorithm by accuracy, recall rate, and F1 score, and compared it with some machine learning algorithms. The results verified the feasibility and effectiveness of the algorithm, which can be used for real-time anomaly detection in the energy management database.
Mathematical Model of Receiver Location with Unknown Transmitter Number
Authors: He Zhilong , Lv Shuangqing , Zhu Xunbo , Yang Zhengguo , Li Xuefang , Zhao Jianhong
Published: August 2023

The paper uses the theory of elementary mathematics, uses the angle and side length relationship between multiple UAVs, and applies the sine theorem and cosine theorem to establish the bearings-only passive positioning model. The model can be solved by only two transmitters for accurate positioning, Through practice, the model has a high fitting degree, and finally realizes the positioning of the UAV.
Increased tropical cyclone intensification time in the western North Pacific over the past 56 years
Authors: Wu Liguang , Lu Jun , Feng Xiaofang
Published: August 2023

It has been projected that the influence of anthropogenic climate change on tropical cyclone (TC) intensity could be detected by the end of the century although significant increasing trends in TC intensity metrics have been found based on the currently available historic records. The human influences on TC intensity have been debated for about two decades because of a lack of quantitative assessment of the contributions of large-scale environmental factors and track shifting. As an extension of a previous study, we show that the observed rise in the percentage of intense TCs in the western North Pacific basin over the past 56 years resulted from the combined influence of the track shifting and temporary changes in environmental factors. The influence of environmental factors was primarily owing to the decrease of environmental vertical wind shear and the warming of sea surface temperature (SST). While a small part of the observed rise in the percentage of intense TCs resulted from SST warming, the track shifting increased the TC intensification time by 18.2% (11.3 h) over the past 56 years, accounting for more than one-third of the observed percentage increase in intense TCs. Since track shifting is also projected in the global warming experiments, this study suggests that anthropogenic climate change may intensify TCs by shifting TC prevailing tracks.
Estimation of Selection Indexes and some Genetic Parameters in the Genotypes of the Rice Crop Oryza sativa L.
Authors: Al-Wardi Mustafa Eskander Zaid , Abbas Saddam Hussein , Musa Abdul-Kadhim Jawad
Published: August 2023

The current slowdown in production is a cause for concern and must be reversed to meet the population increase. Therefore, it is necessary to exploit genetic resources in maximizing production to ensure food security, as genetic differences provide a continuous source of variation, which is the basis for selecting plants that are excelled in their productive traits. A field experiment was conducted at the rice research station in Al-Mishkhab which locoted in the south of centre of Najaf provainc/ Iraq, during the summer season 2021. The 22 genotypes were cultivated, using the RCBD randomized complete block design with three replicates, and the averages were tested by Duncan’s test at a probability level of 0.05. The results of the mean squares of the genotypes were significant for all studied traits at a probability level of 1% and the highest value of an indicator as a Selection Index was (1963.052) for the genotype of IPA1. The genotype IPA1 gave the highest averages in plant height, flag leaf area, number of days to physiological maturity, grain yield and biological yield, 134 cm, 38.59 cm, 151.33 days and 10.81 tons. ha−1 and 41.77 tons.ha−1 respectively. The genotype was significantly excelled by giving the highest values of chloropyll content 44.55 SPAD for Khazar and weight of 1000 grains 28.27 g for Al Baraka genotype. The genetic and phenotypic variations were significant for all traits with the close of genetic variances values to the values of the phenotypic variances. The results of the genetic analysis showed that the values of the phenotypic and genetic variation coefficients ranged between low and medium for most traits. The percentage of heritability in the broad sense was high for all traits, and the values of the expected genetic improvement ranged between low, medium and high for the traits and the highest value of the expected genetic advance as a percentage was 44.42 for the percentage of infertility.
Impact Foliar Spraying of NPK Nano Fertilizer on Yield Traits of Two Varieties of Bread Wheat (Triticum aestivum L.)
Authors: Alqasim Yahya Fawzi Yahya , Ghazal Salim Abdulla Younis Al-
Published: August 2023

A field experiment was performed in two sites within Nineveh Governorate, the first site within the center of Mosul (Gleokhan) and the second site within the administrative boundaries of Namrod sub-district of Nineveh Governorate, which is (45) km away from the center of Mosul center. The treatments of the experiment was a three levels (1, 2 and 3 g.L−1) of NPK nano fertilizer and a fourth level of addition such as the control treatment (the traditional farmer method), and two varieties of bread wheat (Bhoth 22 and Abu Ghraib). was done Study the following qualities: number of spikes, spike length, number of spike grains, weight of 1000 grains, grain yield, biological yield, harvest index and straw yield. As for the results of the experiment, they were as follows: In the first study site (Gleokhan), no significant differences were observed between the levels of nano-fertilizer in most of the studied traits, and in the second site, the control treatment was significantly superior by recording the highest averages for most of the traits, and the spraying treatment 1 g.L−1 recorded a significant superiority for the weight of 1000 grains trait. Bhoth 22 outperformed Abu Ghraib with most of the studied traits and for both locations, while the Abu Ghraib cultivar was surpassed to Bhoth 22 in spike length and straw yield in the first location, spike length, number of grains per spike, and straw yield in the second location.
Impact of Humic Acid and some Pre and Post-Harvest Treatments in Improving Storage Behaviour of Hot Pepper Fruits (Capsicum annuum L.) Hybrid Barbarian F1
Authors: Fadala Laila Turki , Taain Dhia Ahmed , Hassan Fatima Ali
Published: August 2023

The experiment was carried out during the 2020-2022 growing seasons in one of the unheated greenhouses at Dhi Qar University, south of Iraq, in order to investigate the impact of adding humic acid, pre and post-harvest treatments and their interaction in the storage behavior of hot pepper fruits hybrid Barbarian F1. Factorial experiment consisted of three factors which were the possible combinations of three concentrations of humic acid 0, 1, 2 g. l−1 and five pre and post-harvest treatments which were aqueous extract of jujube leaves at a concentration of (75) g. l−1, aqueous extract of pomegranate peels at a concentration of 5 ml. l−1, calcium at a concentration of 1.5 ml. l−1, arginine acid at a concentration of 200 mg. l−1 in addition to control treatment (distilled water only). Fruits packed into polyethylene bags of 1 kg capacity containing 8 holes of 5 mm diameter and stored at a temperature of 10 ° C in a refrigerated incubator for two weeks. The experiment was designed out according to C.R.D design with three replicates. The results were analyzed by the analysis of variance and mean values were compared using the Revised Least Important Difference Test at 0.05 probability. Results showed that the fruits treated with humic acid at a concentration of 1 and 2 g.l−1 was superior to control in reducing the percentage of decay and retaining the highest content of vitamin C, total soluble solids, capsaicin and phenolic substances. As for the effect of the type of treatments, the fruits treated with calcium recorded the lowest percentage of decay compared to the rest of the treatments in both seasons. The soaking method outperformed compared to spraying one in retaining fruits content of vitamin C. the most interactions among studied factors were significant in their effect on the most parameters.
Effects of Trichoderma Harzianum and Trichoderma Asperellum Against Egg of Meloidogyne Incognita under Laboratory Condition
Authors: Abdulla Ghufran Ali , Saleh Hamood M. , Al-Hakeem Asmaa Mansour
Published: August 2023

In vitro experiment was conducted to evaluate the effects of two Iraqi isolates of Trichoderma harzianum and Trichoderma asperellum against Meloidogyne incognita. It was noted T. harzianum and T. asperellum had a clear effect on on egg hatching inhibition of root-knot nematode, Meloidogyne incognita. the percentage of egg hatching inhibition after the seventh day, reaching to 86.50% and 83.75% respectively, There were no significant differences between them compared to the control.
Effect of Planting Spaces and Basgran Herbicide on Growth and Yield of Pisum sativum L. and Weeds Accompanying It
Authors: Thanon A. I. , Hussain Z. M. , Antar S. H.
Published: August 2023

The experiment was carried out at winter agricultural season (2021-2022) at two location Al-Rashedia and Talkef, the experiment include two factors, planting space, (25, 50 and 75 cm) between the rows and four doses of Basgran herbicide (750, 1500 and 3000 ml / h−1 in addition the control). The experiment applied according factorial experiments system using Randomize Complete Block Design with three replication. the seeds of the Spanish cultivar were sown on 10 and 11 of December the data was analyzed according to the factorial experiments system using R.C.B.D significantly different treatments were distinguished with different letters. The most important results can be summarized as follow : the second distance exceeded than another at decrease the number and dry weight of broad leaves weed at Al-Rashedia location but non-significant differences among the planting space at Talkef location whether at number and dry weight of narrow and broad leaves weeds. The second distance exceeded than another at the yield seeds at Al-Rashedia location while the third distance exceeded at Talkef location.non-significant differences among the doses of Basagran herbicide at effect on No and dry weight of broad and narrow leaves weeds at Talkef location and broad leaves weed at Al-Rashedia location.non-significant differences among the doses of Basagran herbicide at effect on seed yield of Pea at two location.
Evaluation the Effect of some Plant Extracts in Controlling the Oriental Hornet vespa orientalis Linnaeus, 1771 Near the Apiaries
Authors: Augul R. S. , Al-Saffar H. H. , Abed I. J.
Published: August 2023

A significant amount of apiaries is destroyed in most areas of Iraq by attacking of the hornetVespa orientalisLinnaeus, 1771, as well as the deterioration of European honey bees’ Apis mellifera Linnaeus, 1758 productivity recently because the environmental changes and pollutions; this effect was evident in the economy and plant production, because the bees as the most popular species of pollinator of crops globally. There is no effective and environmentally safe method yet; Therefore, this study suggested to use essential oils of Mediterranean cypressCupressus sempervirensL., 1753 (Pinales: Cupressaceae), and testing as a repellant substance. In the current investigations, we used three concentrations: 25000, 50000 and 100000 ppm to test efficacy the essential oil as a repellant with cow spleen as attractive bait for this wasp, in addition to, the extract was tested it within the apiary beehives to prevent wasps attacking and catching the worker bees. The result showed that the concentrations of 50000 and 100000 ppm were high repellant material, without finding any significant difference in statistical analysis; although it’s found between these concentrations and other treatments including the control. Therefore, we recommend using the concentration 50000 ppm in the apiaries to give it amazing results and a clear repellant of wasps, as they avoid getting close to the beehives openings at a distance of 45 cm. In addition, this essential oil did not effect on the activity of bees during the field observations.
Effect of Zinc and Wheat Variety on Grain Content of (Zn, Fe, Cu and Mn) Grown in Calcareous Soil
Authors: Kashmola Ammar Y. , Al-Niemi Sadullah N.
Published: August 2023

The seeds of eight cultivars of wheat (Triticum aestivum L.) were divided into two size groups (the first had its seeds trapped in a sieve with holes diameter of 3.41 mm mesh, and the second seeds had trapped in 2.36 mm mesh). Seeds of the eight varieties were planted in plastic pots under greenhouse conditions, and five treatments for zinc (0, 0,3, 0,9, 2,7, 8,1 mg Zn kg−1 soil) and two seed sizes were added to study the combined effect of zinc and wheat variety on Grain content of Zn, Fe, Cu and Mn. The results showed that the addition of zinc led to an increase in the zinc content of grains and a decrease in their content of cupper and manganese at high levels of zinc application While there was no clear effect on iron content.
Seasonal Presence of White Fly Species on Jujube Trees in Nineveh Governorate
Authors: Al-Jalal Haitham Mohieldin Muhammad , Al-Dulaimy Manal Hussein Hamood
Published: August 2023

The study was conducted in the gardens of Mosul University from September 2019 to September 2020 in order to determine the types of white flies that infest Jujube trees and their seasonal activity. The results showed that Jujube trees, Zizyphus spina Christi, were infected with the following species: Acaudaleyrodes rachipora (Singh), Aleurolobus marlatti (Quan), and Aleuroclava jasmini (Takahashi). The percentage of leaf infection was highest in November, followed by September and August with an average 98.95, 94.85 and 94.63%, respectively. The insect preferred upper surface of the leaf than its lower surface, as the average number of nymphs was 15,11, and 1,39 nymphs/leaf, respectively, and the number of nymphs peaked during the autumn months. Direction had no effect on the rate of leaves infection, and no significant differences appeared between the treatments, while the density of nymphs in the leaves was affected by the direction factor, as the southern direction was significantly superior at a rate of 18.85 nymphs/leaf, and no significant differences were recorded between the other three directions. The results of the weekly catch also showed that the density of adults ranged between (1.28-168) adult /trap, peaking in October, while the adult were absent from the traps during January and February. Some predators were seen preying on the stages of the white fly, Lasiochilus pallidulus (Reuter), Oenepia conglobate (L.), Chrysoperla carnea (Stepheus).