bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design and analysis of coaxial cylindrical WPT coils for two-degree-of-freedom applications
Authors: Houran Mohamad Abou , Yang Xu , Chen Wenjie , Li Xiaoteng 
Published: August 2020

Abstract
In this work, we propose two-degree-of-freedom coils for a high coupling wireless power transfer (WPT) system to achieve a constant efficiency against rotation and linear movements. The transmitting (Tx) coil and receiving (Rx) coil were wound on a cylindrical joint structure. The Rx coil has a linear motion (Δ) between three assumed positions, as follows. Lower position (P1
), middle position (P0
) and an upper position (P2
). Besides, the Rx coil has an angular movement (α) around its axis between 0° and 360°. The mutual inductance (M) between the Tx and Rx coils is derived and validated by calculations and simulations. Design procedures of the WPT coils and analytical investigations for maximizing the power transfer efficiency are discussed in detail. In addition, simulation results under linear and angular movements are presented. Finally, the WPT coils were fabricated. The experiment results were in good agreement with the calculation and simulation results.
Projection-angle-dependent distortion correction in high-speed image-intensifier-based x-ray computed tomography
Authors: Sanctorum Joaquim G , Van Wassenbergh Sam , Nguyen Van , De Beenhouwer Jan , Sijbers Jan , Dirckx Joris J J 
Published: August 2020

Abstract
Geometric distortion is inevitable in facilities using x-ray image intensifiers. When the induced distortion pattern varies over time, each recorded frame should be corrected accordingly, which is the case in conventional C-arm imaging, for example. This demonstrates the need for reliable and easy-to-use, projection-angle-dependent correction methods. In the present work, we demonstrate such a dynamic approach, based on digital image correlation (DIC). We validate the method in a set-up for high-speed x-ray tomography, where the variable distortion is induced by an inhomogeneous distribution of ferromagnetic components in the sample rotation stage. By comparing the ideal positions of metal beads in a rectilinear pattern and their positions in the corrected radiographs of that pattern, we deduced the minimum number of frames required to estimate the varying distortion behavior during a full revolution of the stage. Next, this method was validated in a geometry calibration algorithm for a tomographic set-up, as well as in a tomographic reconstruction. Before the application of any distortion correction, the recorded images suffer from, on average, a mean and maximum distortion of 11.12 pixels (1.56 mm) and 42.79 pixels (6.10 mm), respectively. From our experiments, we conclude that three projections, sampled with a 120° interval, are sufficient to correct any frame recorded under an intermediate angle, with mean and maximum residual errors respectively below 0.48 pixels (0.068 mm) and 1.68 pixels (0.240 mm) while using a 14” image intensifier covering a 292 mm

×

292 mm field of view. These results imply a decrease of the mean and maximum distortion errors of at least 96%, regardless of the projection angle. Next, the results showed improved accuracy in the system’s geometry calibration, which resulted in a reduced blurring of edges and better contrast, as well as shape preservation in the tomographic reconstruction. This demonstrates that the new method is accurate and reliable and, due to the common availability of DIC software, it is very accessible and easy to use.
Bi and oxygen defects improved visible light photocatalysis with BiOBr nanosheets
Authors: Ren Xiaozhen , Zhang Xunshuang , Guo Ruichen , Zhang Shulan , Wang Lezhi , Pu Xipeng 
Published: August 2020

Abstract
Bi metal attached BiOBr with oxygen defect (BiOBr(3)-Bi(x%, x = 10, 20, 30)) nanosheets was prepared via the hydrothermal process in this study. The different characterization techniques of x-ray diffraction, x-ray photoelectron spectrometer, electron spin resonance (ESR), field emission scanning electron microscope, and high resolution transmission electron microscope were used to distinguish the composition, crystal structure, and morphology of the samples. Under visible light irradiation, the BiOBr(3)-Bi(x%, x = 10, 20, 30) samples exhibited improved photocatalytic activity for the degradation of colored dyes (RhB) and colorless tetracycline hydrochloride. Such an improvement was ascribed to the widened visible light absorption and enhanced separation of the photogenerated electron–hole pairs because of the synergistic effect of oxygen vacancies and Bi metal with plasmon resonance effects. A possible photocatalytic mechanism of the quasi Z-scheme process was proposed on the basis of ESR measurements and radical-trapping experiments.
Non-invasive quantification of the effect of device-guided slow breathing with direct feedback to the patient to reduce blood pressure
Authors: Bachler Martin , Sehnert Walter , Mikisek Ines , Wassertheurer Siegfried , Mengden Thomas 
Published: August 2020

Abstract

Objective: Slow breathing is a relaxation exercise recommended for lowering blood pressure (BP). Biofeedback may improve patient adherence and enhance BP lowering effects. Since the pulse arrival time (PAT) is inversely proportional to BP, it can be used to estimate BP changes. Approach: In this pilot study, 30 patients (age 62.9 (SD 7.7) years, 11 F/19 M, Sys. BP 133.0 (SD 17.1) mmHg, Dia. BP 83.8 (SD 10.6) mmHg) performed a device-guided slow breathing exercise. PAT was measured by ECG and plethysmography and immediately presented to the patient, and respiratory sinus arrhythmia (RSA) was calculated retrospectively to measure the adherence to the instructed respiratory rate. Main results: Respiratory rate was 13.6 (SD 1.9) bpm at baseline and 5.4 (SD 1.0) bpm during guided breathing. PAT continuously and progressively increased from 231.5 (SD 20.3) to 237.3 (SD 18.5) ms (p

<

0.001). The median deviation of RSA from the guided respiratory rate was 0.06 (IQR 0.19) bpm. In three patients, a deviation of > 0.20 bpm was detected, and two of them showed no increase in PAT. In total, 25 patients responded with increase in PAT. Significance: In this pilot study we have shown that biofeedback of PAT and RSA are feasible and can further improve motivation and adherence. Furthermore, we have shown that the exercise increased PAT, which indicates a reduction in BP. Due to its ease of use, this method is ideal for home use and self-monitoring.
Research on H∞ Controller of Cyber Attacks and Eventriggering Mechanism
Authors: Chen Linqi , Gao Yan , Ma Jianwu , Gu Fengjiao 
Published: August 2020

Abstract
Aiming at the limited network bandwidth and various cyber attacks, the H∞ neural network controller triggered by discrete events is studied. In order to further improve the utilization of network bandwidth, the event triggering mechanism is improved by taking advantage of the advantages of event triggering in network transmission. At the same time, due to various uncertain and deliberate network attacks, data tampering and packet loss problems are caused. A new neural network control system model is established based on the attack mode obeying Bernoulli probability and dynamic integration. By using Lyapunov function, sufficient conditions are obtained to ensure the asymptotic stability of the closed-loop system, which meets the requirements of H∞. Finally, a numerical example is given to verify the validity of the results.
Variation of Salinity in both Surface and Bottom Layers in Jiaozhou Bay
Authors: Yang Dongfang , Lin Dong , Wang Qi , Zhang Longlei , Li Haixia 
Published: August 2020

Abstract
Based on the investigation data on Jiaozhou Bay in May and October 1979, the vertical distribution and seasonal variation of salinity in the surface and bottom waters from the inner waters to the outer waters of Jiaozhou Bay were studied, and the seasonal distribution, variation range and horizontal distribution trend of the salinity in surface and bottom layers were determined. The results showed that from May to October, in the waters of Jiaozhou Bay mouth, the inner waters of the bay mouth and the outer waters of the bay mouth, the seasonal change of salinity in both surface and bottom layers from low to high was: autumn and spring. In Jiaozhou Bay, from the inner water area to the outer water area, in May and October, the variation ranges of salinity in surface and bottom layers were basically the same. When the salinity content in surface was relatively low, that of the corresponding bottom layer was relatively low; when the salinity content in surface was relatively high, that of the corresponding bottom layer was relatively high. It showed that the salinity was fully transported to every part of the ocean through horizontal current transport and vertical eddy mixing. In Jiaozhou Bay, from the waters inside the bay mouth to the waters of the bay mouth, the horizontal distribution trends of salinity in the surface and bottom were opposite in May and the consistent in October. In May and October, the horizontal distribution trends of salinity in surface and bottom from the bay mouth to the outside of the bay mouth were consistent. Therefore, from May to October, in the inner waters of Jiaozhou Bay mouth, bay mouth waters and the outer waters of bay mouth, the seasonal variation mechanism of salinity in surface and bottom: both high and low salinity were transported by horizontal currents from the outer water area of the bay mouth to the water area of the bay mouth, and then to the inner water area of the bay mouth, which determined the seasonal variation mechanism of salinity in surface and bottom.
Analysis of DCO-OFDM for Indoor Visible Light Communications
Authors: Hong Wenxin , Li Tianyu , Li Weize , Shi Xinyue 
Published: August 2020

Abstract
A novel orthogonal frequency division multiplexing (OFDM) technique called DC-biased optical OFDM (DCO-OFDM) as-applied to indoor visible light communication (VLC) systems was analysed in this study. Line-of-sight (LOS) and non-LOS (NLOS) models were assumed and the luminance intensity and multipath dispersion of a single reflection were measured for indoor LOS and NLOS models; 1-dB and 3-dB DC biases were applied to DCO-OFDM with 4-, 64-, or 128-QAMs for BER analysis, respectively. The quantity of lighting equipment appropriates for communication based on the model room was determined, as well as the optimal number of sources dependent on illuminance, mean density of pedestrians, room model. The results showed that as M and DC bias values increase, SNR grows excessively (about 2.5 dB) in the LOS model. Reflection, additionally, has a severe impact on BER in NLOS conditions (nearly 10−3) regardless of M or DCdB value. Compared to the LOS model, the NLOS model requires a loss of about 12 dB of DCO-OFDM SNR.
OFDM Cooperative Relay Transmission and Interference Elimination Technology
Authors: Wei Tao 
Published: August 2020

Abstract
Aiming at Orthogonal Frequency Division Multiplexing (OFDM) cooperative relay transmission system, a scheme of interference elimination between OFDM relays based on precoding was proposed for OFDM system continuous relay network. The new scheme precodes the frequency domain signals of the source nodes alternately, maps the expected signals and interference signals of the relay to two orthogonal subspaces. The interference elimination of the relay is achieved and the expression of the optimal precoding matrix is deduced. The application in OFDM system can effectively eliminate the influence of multipath effect on system performance. The effectiveness of the scheme is verified by simulation experiments.
Analysis on Linguistics Research Directions in the Age of Big Data
Authors: Lu Tingyu 
Published: August 2020

Abstract
With the development of science and technology in recent years, concepts such as big data and databases frequently appear in people’s fields of vision. Among them, big data and the construction of foreign language corpora have become common practice in the field of academic research. It has a certain understanding by consulting related journals, papers and books. This article starts with what big data is, what it means to build a corpus for linguistic research, and the situation of linguistic research in the context of big data, and briefly explains the current status of data and linguistic research in the context of big data discussion and at the same time hopes to have a more comprehensive understanding and understanding of the database.
Design and Implementation of a Smart Wireless Fire-Fighting System Based on NB-IoT Technology
Authors: Shi Xiuxiang , Songlin Lai 
Published: August 2020

Abstract
The traditional smoke sensing systems have some disadvantages, including high implementation costs, difficulties in perceiving working states, low data accuracy and troubles in uniform and effective management. To address these problems, a new type of smart wireless fire monitoring system based on NB-IoT technology is innovatively designed, which realizes real-time remote monitoring and management. Compared with traditional smoke alarm systems, this system has such advantages as ultra-low power dissipation, lithium-ion battery power, no wiring, remote monitoring, low battery alarm and so forth. With great application prospect, it is worth to develop and rolled out.
A Novel Semi-Distributed OFDMA for Indoor Visible Light Communications
Authors: Hong Wenxin , Li Tianyu , Li Weize , Shi Xinyue 
Published: August 2020

Abstract
In this paper, a novel OFDMA architecture based on the characteristics of the indoor visible light communication network is introduced. It is characterized by a microcell structure and frequent terminal switching. The OFDM proposed in this paper adopts DCO-OFDM modulation technology, which is determined by the consideration of the nonlinear and non-negative signal transmission characteristics of LEDs, and the SLM algorithm is also introduced to reduce PAPR. The simulation results demonstrate that the SLM algorithm can effectively reduce the PAPR of DCO-OFDM, which increases the probability that the signal in the entire system is lower than the PAPR threshold. Compared with the SLM algorithm, its CDF probability is increased by about 40%, and the SNR is also improved by 2.5 dB. The proposed OFDMA is a semi-distributed structure that is controlled by the DME to allocate subcarriers to each AP, and each has the ability to allocate subcarriers independently. Based on this architecture, an idea of dynamic subcarrier allocation is proposed, and uses the optical power received by the terminal as the SIR index to allocate different subcarriers to different SIR terminals and optimize the utilization of resources. The results of the modeling and simulation indicate that when the subcarrier allocation algorithm and method of reducing PAPR via SLM are combined, the BER of the system is significantly improved; when the SNR is 13 dB, the BER can be reduced to less than 10-6. This method can help the system reach the perfect communication target with a lower SNR, allowing the system to achieve better BER performance with less power consumption.
Research on the Effectiveness Design of Information System Software Test Case Based on Clustering Algorithms
Authors: Jijun Zeng , Famao Mei , Jiaxin Lin 
Published: August 2020

Abstract
With the rapid development of software industry, the scale of software becomes larger and larger, and the complexity of software becomes higher and higher. The test coverage criterion traverses to get the corresponding test path and deletes the redundant path according to the constraints, then analyses and eliminates the contradictions in each test scenario to get the consistent requirement scenario, and finally generates the test case set of interlocking software. Test cases are the basis of test execution. Effective writing of test cases plays an important role in the whole testing process of information system. There are constraints (such as dependencies and mutual exclusions) between input items or parameter values, and the constraints certainly exist. From the initial frequent pattern mining to closed pattern mining, maximum pattern mining, incremental mining, topic interest measurement, privacy protection, data flow and other types of data mining association rules.
Microscopical and molecular diagnosis of gastrointestinal nematodes infecting small ruminants in Menofia governorate
Authors: Elkhatam Ahmed , AbouLaila Mahmoud R. , Elbahy Nasr , Roshdy Tamer M. 
Published: August 2020

Abstract
Gastrointestinal nematodes are the most common problems affecting the health and productivity of small ruminants. The study was carried out on 45 slaughtered small ruminants (19 sheep and 26 goats) for microscopical and molecular diagnosis of recovered nematodes. The gastrointestinal tracts of slaughtered animals were examined by sieving method for nematode recovery. The recovered nematodes were washed, cleared, mounted and identified. RAPD-PCR was carried out on 10 samples (adults and larvae) by using 3 primers. The results revealed that the infection rate of nematodes was higher in sheep than goats. The recovered nematodes were Haemonchus contortus, Trichostrongylus axei, Cooperia sp, Ostertagia ostertagi and Trichuris ovis. The infection rate of different nematodes was recorded. Comparison between Trichuris ovis from sheep and goats revealed genetic polymorphism and genetic variability in DNA amplification using three primers. Overall, RAPD-PCR indicated genetic polymorphism and genetic variability between different nematodes and within the same species.
Evaluation of Nano and Magnetization in Wastewater Treatment and its effect on the growth of Vigna radiata L.
Authors: Mahdi W. , Alsamarrai S. 
Published: August 2020

AbstractTwo laboratory experiments were conducted, the first to obtain the best concentration of nanomaterial’s used Fe3O4 in removing heavy elements from wastewater, and the concentrations were (50, 100, 150, 200, 250) mg.L−1, and the concentration was chosen 100 mg. L−1was the best concentration after achieving the highest rate of removal of heavy elements from wastewater, and the second to test the effect of treated nanoparticles and magnetic particles, and the interference between them in the germination rate of livestock seeds used as a biomarker in sterile plastic plates at a rate of three iterations per treatment and experiment parameters were water treatment River T0 and T1 treatment untreated wastewater and T2 wastewater treatment with nanomaterial’s treatment, T3 magnetic treatment wastewater treatment and T4 treatment, which overlap between the two treatments, and T3 and T4 treatments achieved the highest germination rate of 100% for the two treatments. A field experiment was conducted in Al-Mu’tasim area, 20 km south of Samarra - Salah Al-Din area located at latitude 3771307 and longitude 413224 in July 2019 to see the effect of experiment treatments on some characteristics of the growth ofVigna radiataL. plants, and the results showed that the T4 treatment significantly exceeded all treatment treatments in Some plant growth characteristics such as plant height, leaf area, dry vegetable weight, dry root weight and percentage (43.00, 14.60, 77.95, 71.87)% for trait respectively when compared to T1 treatment which achieved lower mean for the mentioned traits.
Effect of Progesterone and GnRH treatment on non-functional ovaries in Holstein cows after calving in Babylon province
Authors: Al-Nuaimi Ali J. , Ali Alzahid Abdulamir , Ahmed hamid Alrubaye Talib , Abid Ali R , Jawad Rana A. , Al-Khafaji Nawras M. , Khaleel Al-Sabbagh Juman , Hassan Mayada S. 
Published: August 2020

Abstract
The study was conducted on (50) Friesian cows age (2.5 -5) years with different nutritional levels, suffering from dysfunction ovary for the period (40-55) days after birth of the year (2019). In the milk cows station (Faiha) / Babylon province. To treat the cases and then follow back to the estrus and use artificial insemination with follow-up pregnancy. The study relied on dietary and hormonal therapy during the open period of adult (110-125) days, cows were divided into two groups (non-functional ovaries and control), which consecutively was divided into three sub groups, including control and treatments. hormone therapy must be linked to poor food. Weaknesses or functional delays are not recommended to used hormonal therapy unless the animal’s health and nutritional status are improved, As well as the genetic status of the animal dependent on breed selection in terms of nutritional conversion and access to sexual puberty and its ability to maintain the balance of energy is the most important thing that makes the animal in the normal situation in terms of production during his life. Progesterone and GnRH therapy also play a role in the reactivation of ovaries in cases of delayed and hostile. Functional delays are also easier to treat, which is done by dietary improvement only and may not need hormone therapy, especially after adjusting the nutritional status in particular. We conclude from this study that the nutrition improvement before and after birth and improve the quality is the most important things in the management and breeding of animals and during their life cycle before puberty and focus on the postpartum period to restore the animal to its normal functional activity.
Rsponse of Dixired Peach Trees to Sulphur and Iron Application
Authors: Al-Aareji Jassim M. A. , H.S. Bani Shukri 
Published: August 2020

Abstract
A present study was conducted during 2011 growing season on six year old of peach trees ( Prunus persica Batsch ) grown in Gr-Rash orchard / Duhuk governorate / Iraq, to investigate the effect of Sulfur and Iron on tree yield and some of fruits characters. The experiment was carried out in a Randomized Complete Block Design ( R.C.B.D.), Including two factors, first was soil application of Sulfur which was applide in the first week of January at four levels (0, 250, 500 and 750 gm S. tree−1), second was foliar spray with three concentrations of iron ( 0, 50 and 100 mg Fe . L−1) using Fe-EDDHA ( 6% Fe ) which was sprayed at two equal sprays, first was done after 15 days of full bloom, the second spray was applied after one month of the first spray.Results indicated that Sulphur application especially at a level of 750 gm S. tree−1 and Fe at a concentration of 100 mg Fe . L−1 each alone or with each other significantly increased fruits number per tree, fruit weight, tree yield, TSS, TSS / acidity, fruit juice and peel anthocyanin content, meanwhile fruit acidity was significantly decreased with the increase the level of Sulfur and Fe application.
Reporting Synechocryptus bovei (Brullé, 1846) (Hymenoptera: Ichneumonidae: Cryptinae) first time in Iraq
Authors: Al-Zurfi Sienaa M. , Aljaafari Raad K. , Manar  , Abbas A. , Kareem Ali A. 
Published: August 2020

Abstract
The subfamily Cryptinae (Hymenoptera: Ichneumonidae) is the largest ichneumon wasps. During insect survey in fruit trees field, Karbala Governorate, Synechocryptus bovei was collected in 2019 using sweep nets. This is the first report of S. bovei from Karbala, Iraq.