bluuebunny/crossref_metadata_2025 huggingface dataset:
Spatial proximity moderates genotype uncertainty in genetic tagging studies
Authors: Augustine Ben C. , Royle J. Andrew , Linden Daniel W. , Fuller Angela K.
Published: July 2020

Significance

We present a statistical framework for the estimation of animal demographic parameters, such as abundance, density, and growth rate, from noninvasive genetic samples (e.g., hair, scat). By integrating a genetic classification model with a spatial population model, we show that accounting for spatial proximity of samples reduces genotype uncertainty and improves parameter estimation. Our method provides a fundamentally different approach to genetic capture–recapture by sharing information between the normally disjunct steps of assigning individual identities to genetic samples and modeling spatial population processes. Our approach may also be used in other ecological classification problems such bioacoustics, remote camera images, and environmental DNA, where current approaches make assignments disconnected from the ecological and spatial context of the population under study.
Transcriptome profiling reveals signaling conditions dictating human spermatogonia fate in vitro
Authors: Tan Kun , Song Hye-Won , Thompson Merlin , Munyoki Sarah , Sukhwani Meena , Hsieh Tung-Chin , Orwig Kyle E. , Wilkinson Miles F.
Published: July 2020

Significance

The ability to culture human spermatogonial stem cells (SSCs) in vitro is critical to develop SSC therapeutic approaches to treat male infertility. To achieve this goal, it is important to define molecular pathways in human SSCs. Toward this end, we developed an approach to purify human primitive undifferentiated spermatogonia (uSPG) highly enriched in SSCs. Comparative RNA-sequencing analysis of these primitive uSPG versus differentiating SPG identified differentially expressed genes encoding key components in several signaling pathways. Leveraging this information, coupled with single-cell RNA-sequencing analysis, we studied the effects of modulating signaling pathways on human SPG fate in vitro. Inhibition of AKT signaling favored primitive uSPG fate, which can be applied to culture SSCs for therapeutic applications.
Analogy between periodic patterns in thin smectic liquid crystal films and the intermediate state of superconductors
Authors: Zappone Bruno , Mamuk Atilla Eren , Gryn Iryna , Arima Valentina , Zizzari Alessandra , Bartolino Roberto , Lacaze Emmanuelle , Petschek Rolfe
Published: July 2020

Significance

Microscopic patterns of molecular alignment are easily obtained in smectic LCs subject to conflicting alignment conditions and provide a promising route to the rapid bottom-up fabrication of ordered materials, notably for the organization and manipulation of nanoparticles. A convenient but puzzling feature is that the pattern type can be switched between 1d and 2d by varying the film thickness or applying an electric field. We devised a simple experiment to show that 1d patterns are due to frustration of the smectic phase under a strong distortion of the molecular director field, leading to a mixed nematic–smectic phase. Our finding confirms the long-standing prediction of an “intermediate” LC state based on an analogy with superconductors.
Nixalone is sufficient to convert femaleAedes aegyptiinto fertile males andmyo-sexis needed for male flight
Authors: Aryan Azadeh , Anderson Michelle A. E. , Biedler James K. , Qi Yumin , Overcash Justin M. , Naumenko Anastasia N. , Sharakhova Maria V. , Mao Chunhong , Adelman Zach N. , Tu Zhijian
Published: July 2020

Significance

The presence of a dominant male-determining locus (M-locus) in one of a pair of autosomes establishes the male sex in the dengue fever mosquitoAedes aegypti. TheAe. aegyptiM-locus contains 30 genes, includingNix, a previously reported male-determining factor. Here we show that theNixtransgene alone was sufficient to convert females into fertile males, which continued to produce sex-converted progeny. We also show that a second M-locus gene namedmyo-sexwas needed for male flight.Nix-mediated sex conversion was 100% penetrant, heritable, and stable, indicating great potential for developing mosquito-control strategies to reduce vector populations by female-to-male conversion. This work also sheds lights into the molecular basis of the function of the M-locus.
Quantifying and explaining variation in life expectancy at census tract, county, and state levels in the United States
Authors: Boing Antonio Fernando , Boing Alexandra Crispim , Cordes Jack , Kim Rockli , Subramanian S. V.
Published: July 2020

Significance

Current knowledge on which geographic scale matters the most for inequalities in longevity in the United States is largely confined to counties, which have been the smallest unit at which national data on life expectancy were available. Making the inference that “counties make a difference” simply because “counties differ” is potentially problematic. In this systematic investigation of ascertaining the relative importance of three geographic scales: states, counties, and census tracts (CTs), we find that more than three-fourths of the total variation in life expectancy is attributable to CTs. This indicates that population inequalities in longevity are primarily a local phenomenon, and there is a need for greater precision and targeting of local geographies in public policy discourse.
An artificial aquatic polyp that wirelessly attracts, grasps, and releases objects
Authors: Pilz da Cunha Marina , Kandail Harkamaljot S. , den Toonder Jaap M. J. , Schenning Albert P. H. J.
Published: July 2020

Significance

Wirelessly controlled, multitasking soft devices active in aqueous environments are highly required for applications in microfluidics and organ-on-a-chip and as medical devices. Inspired by marine organisms, we present an approach to achieve such devices by utilizing stimuli-responsive material assemblies capable of untethered object manipulation in an enclosed aqueous environment. Our soft robot assembly integrates a magnetically controlled stem with a light-responsive gripper with unmatched speed, insensitivity to contaminants, and high control of actuation underwater at low light intensities. The independent device segments can be orthogonally controlled to realize different tasks such as attracting, capturing, and releasing targets in an aqueous environment, demonstrating the significance of actuator assemblies in the fabrication of multifunctional soft devices operating underwater.
Phase imaging of transition from classical to quantum plasmonic couplings between a metal nanoparticle and a metal surface
Authors: Wang Hui , Yu Hui , Wang Yan , Shan Xiaonan , Chen Hong-Yuan , Tao Nongjian
Published: July 2020

Significance

When a metallic nanoparticle is brought within the electron tunneling distance from a metal surface, quantum coupling between the nanoparticle and the surface is anticipated. We show that the quantum effect can be directly observed by imaging the nanoparticle with a high-resolution plasmonic microscope. Direct measurement of the transition in terms of a phase shift induced by the quantum coupling between a metal nanoparticle and a metal surface opens prospective for a biosensing principle with surface plasmon resonance imaging.
Pencil–paper on-skin electronics
Authors: Xu Yadong , Zhao Ganggang , Zhu Liang , Fei Qihui , Zhang Zhe , Chen Zanyu , An Fufei , Chen Yangyang , Ling Yun , Guo Peijun , Ding Shinghua , Huang Guoliang , Chen Pai-Yen , Cao Qing , Yan Zheng
Published: July 2020

Significance

On-skin electronics are usually fabricated by patterning conventional inorganic materials, novel organic materials, or emerging nanomaterials on flexible polymer substrates. Consequently, the state-of-the-art on-skin electronics usually suffer from expensive precursor materials, costly fabrication facilities, complex fabrication processes, and limited disposability. By using widely accessible pencils and papers as tools, we have developed a variety of cost-effective and disposable on-skin electronic devices, ranging from biophysical sensors and sweat biochemical sensors to thermal stimulators, humidity energy harvesters, and transdermal drug-delivery systems. Also, pencil–paper-based antennas, two-dimensional and three-dimensional circuits, and reconfigurable structures are demonstrated. The enabled devices can find wide applications particularly in low-resource environments and home-centered personal healthcare owing to their low-cost resources, handy operation, time-saving fabrication, and abundant potential designs.
Behavioral tagging underlies memory reconsolidation
Authors: Rabinovich Orlandi Iván , Fullio Camila L. , Schroeder Matías Nicolás , Giurfa Martin , Ballarini Fabricio , Moncada Diego
Published: July 2020

Significance

We studied how novel events contiguous to memory retrieval affect the process of memory updating termed reconsolidation. We show that memory retrieval sets a neuronal tag to which proteins provided by the novel events can bind, restabilizing thereby memory via a behavioral-tagging mechanism. Our results thus indicate that the different phases of memory stabilization (consolidation, extinction, and now reconsolidation) are mediated by behavioral tagging, which emerges as a general mechanism of long-term memory formation. They provide, in addition, a tool for designing noninvasive strategies to attenuate (pathological/traumatic) or improve (education-related) existing memories via their reactivation with novel experiences.
CDK4/6 regulate lysosome biogenesis through TFEB/TFE3
Authors: Yin Qiuyuan , Jian Youli , Xu Meng , Huang Xiahe , Wang Niya , Liu Zhifang , Li Qian , Li Jinglin , Zhou Hejiang , Xu Lin , Wang Yingchun , Yang Chonglin
Published: July 2020

Lysosomes are degradation and signaling organelles that adapt their biogenesis to meet many different cellular demands; however, it is unknown how lysosomes change their numbers for cell division. Here, we report that the cyclin-dependent kinases CDK4/6 regulate lysosome biogenesis during the cell cycle. Chemical or genetic inactivation of CDK4/6 increases lysosomal numbers by activating the lysosome and autophagy transcription factors TFEB and TFE3. CDK4/6 interact with and phosphorylate TFEB/TFE3 in the nucleus, thereby inactivating them by promoting their shuttling to the cytoplasm. During the cell cycle, lysosome numbers increase in S and G2/M phases when cyclin D turnover diminishes CDK4/6 activity. These findings not only uncover the molecular events that direct the nuclear export of TFEB/TFE3, but also suggest a mechanism that controls lysosome biogenesis in the cell cycle. CDK4/6 inhibitors promote autophagy and lysosome-dependent degradation, which has important implications for the therapy of cancer and lysosome-related disorders.
Political Legitimacy in the Democratic View: The Case of Climate Services
Authors: Lusk Greg
Published: July 2020

Wendy S. Parker and I have advanced an inductive-risk approach to the provision of climate information that relies on the contextual values of information users. This approach aims to improve the effectiveness of climate information in social decision making. The approach’s emphasis on user values, however, conflicts with the so-called democratic view: if scientists employ contextual values, they ought to employ democratically endorsed values to preserve political legitimacy. This article draws on deliberative democratic theory to resolve the conflict, demonstrating that whether user values are legitimate to employ depends on the way labor is divided across deliberative moments.
An Experimental Approach for Detection of the Acoustic Radiation Induced Static Component in Solids
Authors: Deng Ming-Xi
Published: July 2020

We propose an experimental approach to directly detect the acoustic radiation induced static component (SC) of primary longitudinal (L) wave propagation in solids using an ultrasonic pitch-catch technique, where a low-frequency ultrasonic transducer is used to detect the SC generated by the co-propagating primary L-wave tone burst that is excited by a high-frequency ultrasonic transducer. Essentially, the experimental approach proposed uses a dynamic method to detect the SC generated. The basic requirement is that the central frequency of the low-frequency ultrasonic transducer needs to be near the center of the main lobe frequency range of the time-domain envelope of the primary L-wave tone burst. Under this condition, the main lobe of the frequency spectrum of the SC pulse generated adequately overlaps with that of the low-frequency ultrasonic transducer. This will enable the generated SC pulse to be directly detected by the low-frequency ultrasonic transducer. The performed experimental examination validates the feasibility and effectiveness of the proposed approach for direct detection of the acoustic radiation induced SC generated by L-wave propagation in solids.
Large Barocaloric Effect with High Pressure-Driving Efficiency in a Hexagonal MnNi0.77Fe0.23Ge Alloy
Authors: Zeng Qingqi , Shen Jianlei , Liu Enke , Xi Xuekui , Wang Wenhong , Wu Guangheng , Zhang Xixiang
Published: July 2020

The hydrostatic pressure is expected to be an effective knob to tune the magnetostructural phase transitions of hexagonal MM’X alloys (M and M’ denote transition metals and X represents main group elements). We perform magnetization measurements under hydrostatic pressure on an MM’X martensitic MnNi20.77Fe0.23Ge alloy. The magnetostructural transition temperature can be efficiently tuned to lower temperatures by applying moderate pressures, with a giant shift rate of –151 K/GPa. A temperature span of 30 K is obtained under the pressure, within which a large magnetic entropy change of –23 J⋅kg−1K−1 in a field change of 5 T is induced by the mechanical energy gain due to the large volume change. Meanwhile, a decoupling of structural and magnetic transitions is observed at low temperatures when the martensitic transition temperature is lower than the Curie temperature. These results show a multi-parameter tunable caloric effect that benefits the solid-state cooling.
Site Preference of Se and Te in Bi2Se3 − xTex Thin Films
Authors: Sun Yizhe , Kanagaraj Moorthi , Gao Qinwu , Zhao Yafei , Ning Jiai , Zhang Kunpeng , Lu Xianyang , He Liang , Xu Yongbing
Published: July 2020

The ternary topological insulators Bi2Se3 − x
Te
x
have attracted a great deal of attention due to their exotic physical and chemical properties. While most of the studies focus on the properties of these ternary TIs, limited research was performed to investigate the dynamic atomic stack of its crystal structure. We prepared high-quality Bi2Se3 − x
Te
x
thin films on GaAs(111)B substrates using molecular beam epitaxy, characterized with Raman spectroscopy, x-ray diffraction and photoelectron spectroscopy. It is found that when Se is replaced by Te, the preferred substituting sites are the middle layer at 0 < x < 1, and this is also valid for Se substituting Te at 2 < x < 3. In the middle region, the substituting atoms prefer to go to the first and the fifth layer.
Projecting thyroid cancer risk to the general public from radiation exposure following hypothetical severe nuclear accidents in Canada
Authors: JJ Burtt , Rickard M , McAllister A , Bergman L , LB Zablotska
Published: July 2020

A robust emergency management framework can limit radiation exposures and effectively minimise the potentially devastating consequences of a nuclear emergency. We projected thyroid cancer risk resulting from two hypothetical severe nuclear accidents occurring at the Darlington nuclear power plant (NPP) located in Ontario, Canada. Single- and multi-unit accidents were considered. A dose assessment was previously performed using the MELCOR Accident Consequences Code System. The generic criteria used to select the appropriate protective actions are described in the Ontario Provincial Nuclear Emergency Response Plan (PNERP). We hypothesised protection actions only within the 10 kilometre (km) radius of the NPP given the time sensitivity of iodine thyroid blocking. The excess risk of developing thyroid cancer was projected using the US National Cancer Institute’s radiation risk assessment tool RadRAT. We projected zero dose, and subsequently zero risk of developing thyroid cancer for people living within 10 km of the NPP, due to effective implementation of selected protective actions. Based on centreline doses, at the 12 km radius, excess childhood thyroid cancer risks for a one-year-old female as the most critical receptor were projected to be approximately 600% and 130% compared to the baseline were projected for the single- and multi-unit scenarios, respectively. The risk of developing thyroid cancer was projected to be low for adults for both scenarios. The results of this modelling study provide insights into the effectiveness of protective actions in reducing radiation-related thyroid cancer risk when considering hypothetical severe nuclear accidents. Implementation of select protective actions protects the population living near the Darlington NPP. The projected increase of developing thyroid cancer for children living beyond 10 km could potentially be eliminated with additional mitigation measures specified in the PNERP.
Characterization of single channel liquid light guide coupling and SPAD array imaging for tumour margin estimation using fluorescence lifetime
Authors: Stewart Hazel L , Hungerford Graham , Birch David J S
Published: July 2020

Surgery remains one of the key treatment options for tumour removal, and surgeons primarily rely on eye and touch to assess the boundary between healthy and cancerous tissue with no cellular information as guidance. There is therefore a need for a device or instrument that can be used by the surgeon in real-time during the surgical procedure to ensure as many of the cancerous cells and as few of the healthy cells have been removed as possible. Fluorescence approaches have previously demonstrated significant promise in this application, but clinical take-up has been limited and much more characterization of critical parameters needed before robotic surgery can be contemplated. Here we investigate two time-correlated single-photon counting (TCSPC) fluorescence lifetime systems for the detection of phantom tumour margins derived from silica sol-gels. A simple and low-cost liquid light guide system (LLG) incorporating a single photomultiplier detection channel and translational stage was developed. This provided a useful reference for a compact single-photon avalanche diode (SPAD) array camera system for fluorescence lifetime imaging microscopy (FLIM) which permits up to ∼25 000 in-pixel timing measurements at video rates in ambient light using only low energy (∼30 pJ) diode laser pulses to minimize cell and dye degradation. Measurements of phantom margins with sol-gel doped Rhodamine 6G (R6G) of fluorescence lifetime ∼4 ns using the LLG system demonstrates that for 7 mm excitation diameter and over 5–15 mm sol-gel LLG separation the sol-gel only region could be clearly identified 1 mm after the margin position, a widely accepted minimum surgical resolution. A comparison between measurements with the LLG and SPAD FLIM system using the sub-ns fluorescence lifetime of the FDA-approved dye indocyanine green (ICG) demonstrates that the minimum workable spatial resolution and sufficient speed are only achievable with such faster lifetimes using the SPAD FLIM system.
Silent 3D MR sequence for quantitative and multicontrast T1 and proton density imaging
Authors: Liu Xin , Gómez Pedro A , Solana Ana Beatriz , Wiesinger Florian , Menzel Marion I , Menze Bjoern H
Published: July 2020

This study aims to develop a silent, fast and 3D method for T1 and proton density (PD) mapping, while generating time series of T1-weighted (T1w) images with bias-field correction. Undersampled T1w images at different effective inversion times (TIs) were acquired using the inversion recovery prepared RUFIS sequence with an interleaved k-space trajectory. Unaliased images were reconstructed by constraining the signal evolution to a temporal subspace which was learned from the signal model. Parameter maps were obtained by fitting the data to the signal model, and bias-field correction was conducted on T1w images. Accuracy and repeatability of the method was accessed in repeated experiments with phantom and volunteers. For the phantom study, T1 values obtained by the proposed method were highly consistent with values from the gold standard method, R2 = 0.9976. Coefficients of variation (CVs) ranged from 0.09% to 0.83%. For the volunteer study, T1 values from gray and white matter regions were consistent with literature values, and peaks of gray and white matter can be clearly delineated on whole-brain T1 histograms. CVs ranged from 0.01% to 2.30%. The acoustic noise measured at the scanner isocenter was 2.6 dBA higher compared to the in-bore background. Rapid and with low acoustic noise, the proposed method is shown to produce accurate T1 and PD maps with high repeatability by reconstructing sparsely sampled T1w images at different TIs using temporal subspace. Our approach can greatly enhance patient comfort during examination and therefore increase the acceptance of the procedure.
Noise removal in resting-state and task fMRI: functional connectivity and activation maps
Authors: De Blasi Bianca , Caciagli Lorenzo , Storti Silvia Francesca , Galovic Marian , Koepp Matthias , Menegaz Gloria , Barnes Anna , Galazzo Ilaria Boscolo
Published: July 2020

Objective. Blood-oxygenated-level dependent (BOLD)-based functional magnetic resonance imaging (fMRI) is a widely used non-invasive tool for mapping brain function and connectivity. However, the BOLD signal is highly affected by non-neuronal contributions arising from head motion, physiological noise and scanner artefacts. Therefore, it is necessary to recover the signal of interest from the other noise-related fluctuations to obtain reliable functional connectivity (FC) results. Several pre-processing pipelines have been developed, mainly based on nuisance regression and independent component analysis (ICA). The aim of this work was to investigate the impact of seven widely used denoising methods on both resting-state and task fMRI. Approach. Task fMRI can provide some ground truth given that the task administered has well established brain activations. The resulting cleaned data were compared using a wide range of measures: motion evaluation and data quality, resting-state networks and task activations, FC. Main results. Improved signal quality and reduced motion artefacts were obtained with all advanced pipelines, compared to the minimally pre-processed data. Larger variability was observed in the case of brain activation and FC estimates, with ICA-based pipelines generally achieving more reliable and accurate results. Significance. This work provides an evidence-based reference for investigators to choose the most appropriate method for their study and data.
Mechanical Analysis of ROPS Lateral Loading Test-bed for Mining Dump Truck
Authors: Yang Zhijun , Yun Chao
Published: July 2020

This paper analyzes the static load of the ROPS side loading test-bed of the mine dump truck by using the finite element method, obtains the distribution law of the stress and deformation, discusses the feasibility of the simulation analysis, and makes a beneficial exploration for the design and improvement of the similar ROPS in the future.
A Security Refreshing Algorithm of Dynamic Node based on Fast Group-Blind Signature
Authors: Fan Hongbin , Rao Jiamin
Published: July 2020

In the contemporary society, electronic payment becomes a part of people’s life. It can make people’s life more convenient and faster. At the same time, security’s problem and efficiency’s problem in the electronic payment arouse the attention of many researchers. In this paper, we study group-blind signature algorithms in digital signature technology. We take LR98 group-blind signature algorithm as the research object and analyze its problems. The algorithm put the fixed value l as security parameter, which results in the low efficiency of algorithm. In this paper, new security parameters are adopted, and take blind signature method of Boldyreva into consideration, a new group-blind method is proposed, CL-LR98. New method is applied to wireless communication network (WSN). A number of communication nodes (AP) and user terminal (UE) are built, which is used as the experimental environment. New group-blind signature method is applied to dynamic refreshing of WSN nodes, which includes anonymous communication, data transmission. In the process of experiments, new group-blind method has excellent characteristics, it has short signature character length, it can be simply realized and it has better encryption performance. In the node joining part and revocation part of communication process, these excellent characteristics make computation small, make node refresh efficiency high, and it will not cause frequent movement of other communication nodes.
A New 3D Surface Reconstruction Method
Authors: Fu Wei , Wu Lushen
Published: July 2020

The existing complete orthogonal function system cannot introduce the spectrum analysis into geometry information processing field. This paper proposes complete orthogonal v system reconstruction method based on the 3D data mode, and this method is to map surface data model to parametric triangular domain. The complete orthogonal V system in triangular domain is used to expand the surface data model and the 3D model reconstruction with piecewise polynomial is realized, and it has simple operation and can handle any topology grid. The experimental results show that the error of three experimental models is controlled in 0.25 mm, Compared with Voronoi-based method and Yoshimoto’s method, the accuracy of the proposed method is improved obviously, and the orthogonal v system under reconstruction time compared with Voronoi-based method reconstruction time is shortened by 13%. Therefore, reconstruction precision and speed can meet the requirements of industrial design.
Construction and Application of Web-Based Resource Repository of College Physical Education
Authors: Deng Chenliang , Tang Zhaohua , Li Xuemei , Zhao Zhangzhi
Published: July 2020

The construction of college physical education network teaching resources is based on teaching needs, guided by curriculum innovation, aimed at integrated teaching, and follows relevant national policies to realize the development and sharing of resources. By using the methods of literature, questionnaire, data analysis and action research, this paper studies the related problems, expounds the concept, value, significance and basic structure of the network teaching resource database of physical education in colleges and universities, and studies its construction and application status. On the basis of learning from the good practices of other schools and other disciplines, and taking our school as an example, we have established a physical education network teaching resources database with strong pertinence and practicability, namely AI sports. It basically covers the main courses of physical education and can meet the teaching needs of teachers and students. It not only enriches the means of physical education teaching, but also realizes the integration of physical education teaching and plays an active role in physical education teaching.
Attention-Based Encoder-Decoder Model for Photovoltaic Power Generation Prediction
Authors: Zhu Xiang , Hu Juntao , Song Liangcai , Suo Guilong , Zhan Yong
Published: July 2020

The weather factors that affect the output of photovoltaic power generation systems have great volatility and discontinuities. Thus how to accurately predict the output of photovoltaic power generation has become a crucial issue. In this paper, we propose an attention-based Encoder-Decoder model for photovoltaic power generation. Filtered data based on maximum information coefficient is used as one of the features to reconstruct the experiment data. Then the attention mechanism is introduced to the Encoder-Decoder model, which constructed by Long Short-Term Memory (LSTM) neurons. We implement this experiment based on actual photovoltaic power plant examples and experimental results confirm the accuracy and applicability of the proposed model in predicting photovoltaic power generation
Mechanical Analysis of Floor Heating Decoration of High-rise Residence
Authors: Yang Zhijun , Yun Chao
Published: July 2020

The mechanical analysis of the vertical load and the wind load of the high-rise building is carried out by using the finite element method. The law of internal force and deformation is obtained. It is found that the reinforcement ratio is increased compared with the original design value, and there is a potential safety hazard. It has reference and guidance significance for the future practical design.
Research on Dynamic Allocation Strategy of KU Satellite Spectrum Based on Cognitive Radio Technology
Authors: Zhou Xinsheng , Zhao Lili , Yu Pengpeng , Dong Qicai , Yang Juan , Liu Jing , Zhao Yan
Published: July 2020

Aiming at the problem of insufficient satellite spectrum resources in the KU band, combined with the most advanced cognitive radio technology in the communication field, this paper proposes a dynamic spectrum allocation strategy for KU satellites based on cognitive radio technology. By dynamically allocating frequency resources, the spectrum resources are greatly improved. Use efficiency, while improving the anti-interference ability of the satellite system.
Kalman Filtering Algorithm for Integrated Navigation System in Unmanned Aerial Vehicle
Authors: Lv Wenfa
Published: July 2020

Through the complementarity of the satellite navigation positioning system (GNSS) and the inertial navigation system (INS), the combination of GNSS/INS can make up for the shortcomings of a single system that is difficult to improve, thereby greatly improving the accuracy of the integrated navigation system. In this paper, the transformation relationship between the carrier coordinate system and the navigation coordinate system is deduced, and the INS position and velocity measurement methods are derived. Based on the theory of GNSS/INS loose combined system and Kalman combined filter, the system equation and measurement equation of combined filter Kalman are studied in depth. The principle of discrete Kalman filter is researched, and five basic equations of Kalman filter are given. Then the speed and position model of Kalman filter of GNSS/INS loose combined navigation is derived in detail, and according to the speed and position model perform semi-physical simulation experiments. The experimental results show that the inertial sensor can provide navigation information during the GNSS receiving signal gap, and the position and speed information of the GNSS can also correct the navigation information of the inertial sensor.
A Fatigue Driving Detection Method based on Deep Learning and Image Processing
Authors: Wang Zhong , Shi Peibei , Wu Chao
Published: July 2020

Driving fatigue is one of the important causes of traffic accidents. It is of great significance to study fatigue driving detection algorithms to improve human life and property safety. This paper proposes a fatigue driving detection method based on deep learning and image processing. First, the driver’s face image is obtained in real time through the camera and the face image is detected using the MTCNN model. Next the image processing is performed on the face image, including three steps: grayscale processing, binarization processing, and human eye detection. Then we check the legitimacy of the human eye image and calculate the eye closure rate, and finally use the PERCLOS principle to analyze the fatigue state of the driver. The experimental results show that the proposed method has high detection rate and low false alarm rate, and has strong practicality.
Situation Comprehension for UGV Based on Domain Knowledge
Authors: Wang Chao , Zhang Wanpeng , Yang JingZhao , Chen Shaofei
Published: July 2020

Battlefield situation comprehension (SC) plays an important role in the operation observation-orientation-decision-action (OODA) circle of UGV as the results of SC are the input of the UGV mission planning. A situation comprehension method for UGV based on domain knowledge is proposed to overcome the problems of heterogeneous situation data, various relations and plan to be comprehended. Firstly, an ontology based situation comprehension architecture is given. Then, core ontology for situation comprehension is established, based on which a detailed ontology include the opposing sides classes and environment classes is constructed and steps for building situation inferring rules are listed. Finally, in a frontline defence scenario, different situation types are defined with SWRL and three scenario snapshots are depicted to demonstrate the method proposed in this paper.
Research on Clustering Application Based on Stock Association Network
Authors: Ma Chi , Lu Shengliang , Wang Shaofan
Published: July 2020

This article uses stock market data and text information to construct related complex networks of stock information, and compares the cluster analysis effect of three community discovery algorithms base on two networks to discuss how to classify stocks in order to give Investors provide better reference. First, transform the heterogeneous data into structured data by obtaining and preprocessing. Then, build an association network based on the similarity of stock price fluctuations and the correlation of stock text information. Finally, using three different cluster analysis algorithms to analyze the stock association network and the text similarity network to compare the effects of different algorithms on stock classification.
Research on Simulation Technology of Infrared Missile Battle Scene
Authors: Wang Duo , Luo Huafeng , Li Ming , Wang Yiwen
Published: July 2020

To provide a battle scene for the semi-physical simulation of infrared missile. Picked the main factors of infrared radiation processing, calculated target and background’s temperature, atmospheric radiation transmission, infrared smoke interference. Performed simulation calculation for ship-type target under battle scene and analyzed the simulation results. Provides support for test design.
Satellite Communications Millimeter Wave and RF Technical Analysis
Authors: Cai Chengcheng , Ge Pingxin , Zhang Chengxia
Published: July 2020

This paper introduces the development status and trend of millimeter band of satellite communication. Based on the analysis of the frequency division, spectrum advantages and transmission characteristics of EHF satellite communication, the new technologies adopted in EHF satellite communication are studied, and the special technology and application of the EHF radio frequency circuit are analyzed.
The Development and Application of Remote Monitoring System for Oil Well Working Condition with Mobile Phone Module
Authors: Song Limei , Zhang Jingjing , Hao Cunhe , Qi Huien , Tian Bingying , Li Wei
Published: July 2020

Some pumping wells are remote and distributed, and it is difficult to find problems such as temporary power outages, fault shutdowns, and belt burning, which cause untimely processing, which seriously affects the rate of well opening and reduces crude oil recovery. In order to effectively monitor the operating conditions of pumping units, mobile phone remote monitoring systems have been developed. The system consists of a remote control module, a power supply module, a wireless transmission module, and a mobile phone terminal. It can facilitate front-line employees to quickly monitor oil well operating parameters, detect pumping unit failures in a timely manner, reduce hidden safety hazards, avoid pollution, and provide a powerful technical support for green mine construction.
Spam Filter Based on Naive Bayesian Classifier
Authors: Lv Teng , Yan Ping , Yuan Hongwu , He Weimin
Published: July 2020

Spam now accounts for over 70% of all emails and the harm to users is increasing, such as waste a lot of network bandwidth to transfer and space to store, has large quantity, repetitive, fraud, and unhealthy content, etc. As spam is usually embedded in normal e-mails, it is difficult to identify them. This paper analyzed the main technologies to identify and block spam, such as information or content filtering technology, blacklist and white list technology, intention and behaviour analysis technology, etc. A model to determine an e-mail is a spam or not based on naive Bayesian classifier is presented in the paper. The test result shows that the model is effective.
Data System Configuration and Organizing and Management Technologies of Information System
Authors: Wang Hua , Meng Haidong , Zhang Lianwei , Chen Zhengmao , Wang Shan
Published: July 2020

Based upon the synopsis of data system and information system, this paper puts forward the data system configuration of information system and execution process of data organizing and management, and sets forth a series of related technologies, such as data warehouse construction technology, data governance technology, data training and learning technology, data syncretization and analysis technology, and data subscription and distribution technology, and moreover, the effectiveness analysis is carried out with a performance comparison between the prototype and the existed system of data organizing and management. This will benefit the further evolution of information system and the continual improvement of data engineering.
Analysis of Gender-Specific Regulatory Mechanisms on the Oncogenesis and Prognosis of Glioblastoma Multiforme
Authors: Deng Jianzhi , Zhou Yuehan , Long Wenqing
Published: July 2020

In this paper, we focus on find out the key mRNAs and the key regulatory mechanism of the different morbidity of glioblastoma multiforme (GBM) in different genders. 160 GBM patients’ RNA expressed data and clinical data were downloaded from the TCGA GBM project. 103 differential expressed mRNAs (DEmRNAs) between male and female were screened from the RNA matrix by clustering analysis. In the gene ontology (GO) analysis, the DEmRNAs were enriched in 26 GOterms, including 17 biological process (BP), 4 cellular component (CC), 5 molecular function (MF). Among them, AGTR2, CALCA, CALCB, CTSG, GCG, GCGR, HCRT, PRL and RXFP4 were found that enriched in signal pathway hsa04080. A multivariate COX model was constructed by these 9 DEmRNAs. And GCGR, HCRT and CTSG were found as the co-expression mRNAs. In the clinical data analysis, the kmplot survival curve (p = 1.63e-03) indicated that the co-expression mRNAs and the hsa04080 signal pathway would be built the potential regulatory mechanism for the treatment of GBM in different genders’ patients. And it was then proved by receiver operating characteristic (ROC) curve and area under the curve (AUC) value (AUC=0.766).
Aviation Terminal Data Security Architecture Based on Blockchain
Authors: Chen Zhiwei , Xu Aidong , Wen Hong , Zhang Yunan , Xu Xinchen
Published: July 2020

With the advent of the 5G era, the number of UAV (Unmanned Aerial Vehicle) has grown dramatically. Accordingly, UAV need more computing and storage capabilities to complete a variety of tasks (including some collaborative tasks). To meet the requirements of UAV terminals, edge computing nodes and storage devices need to be deployed. But the problem of trust between edge computing nodes will lead to a series of data security problems. The blockchain features, which contain detrust, immutable, decentralized, can solve this problem properly. Therefore, this paper establishes an aviation terminal data security architecture based on the blockchain. Edge computing nodes and storage devices provide computing and storage resources for UAVs. As the core operating mechanism of the architecture, blockchain technology guarantees that the system has Byzantine fault tolerance performance through its consensus algorithm. The blockchain data structure under this architecture also guarantees that the data access records of all nodes will be written on the ledger and the ledger is stored by all miner nodes.
Big Data Analytics of Movie Rating Predictive System
Authors: Choudhry Neeta , Xie Jianyun , Xia Xiaoling
Published: July 2020

In every organization the data is a significant part that can be separated as structured, unstructured and semi-structured. Unstructured data cannot be administered in the real-time by RDBMS or Hadoop. PySpark can be used for realtime data analysis of movie rating data collection. To generate the modified recommendations, method is intended that is Recommender Systems. Some complications that a Recommender System encountered are data sparsity, cold start, popular bias and scalability. In this research paper collaborative technique is applied for m-ovie rating recommender system. By getting benefits of collaborative filtering technique, we conclude that we use perspective metadata that is freely accessible. Concealed suggestions occur in the middle of movie ratings to personalize recommendations. Our recommended methodology demonstrate novelty by providing the modified recommendations irrespective of research field and of customer’s capability. By the usage of MovieLens dataset a significant development above supplementary standard techniques in evaluating global enactment and capability to yield appropriate and top-ratings at the top of the recommendation list.
On Approximate Querying Large-Scale JSON Data
Authors: Lv Teng , Yan Ping , He Weimin , Wang Tao
Published: July 2020

JSON is a kind of data exchange format based on data types of JavaScript. JSON has been widely used in data exchange applications. To process and query large JSON file is time consuming. It requires not only massive storage disks to store large amounts of JSON data and its intermediate results, but also large CPU times to query and process the massive JSON data. so ordinary methods usually face many difficulties in such cases. Therefore, the key problem of query processing large JSON file is how to process queries efficiently. Therefore, approximate processing large-scale JSON query is an effective way to reduce query response time. So research of approximate query of large-scale JSON data can improve user’s query experience and query effect. This paper researches the major questions of approximate query of large JSON file, such as core query features of JSON model, and methods of approximating query large-scale JSON data.
Research on 3D Facial Expression Simulation Technology
Authors: Wang Zhongmin , Liu Li
Published: July 2020

In order to generate realistic facial animation, this paper uses depth learning object detection technology to detect the three wrinkles of human face, and then the adaptive threshold algorithm is used to extract the wrinkle curves, finally applies realistic wrinkle animation to the virtual face model. In the aspect of expression animation simulation, based on MPEG-4 standard, a database of expression parameters covering six major expressions has been established, which divide the human face into four main animation units and other auxiliary animation units. According to the displacement of animation unit between neutral expression and other expressions, the facial bone points of virtual model are driven to move, thus realizing realistic facial expression animation.
The Design and Implementation of Information Management and Control System for Military Products Intelligent Assembly Line Based on JIT
Authors: Zhao Yuenan , Du Jinsong , Li Xiang , Hua Jinhu , Liu Qingjun
Published: July 2020

To enhance the capabilities of advanced military product manufacturing, this paper carries out a new design and implementation of advanced military product assembly line. Through research on the current bottleneck problems and the aims of the production line, the system structure is designed and the function requirements are analysed to complete the software architecture design. Finally, the JIT information management and control system is completed based on information technology and lean manufacturing.
Design and Implementation of 400 MHz Video Real-Time Transmission System Based on Self-Organizing Wireless Mesh Network
Authors: Gao Li , Yang Jiali , Lan Mingying , Ren Xupeng
Published: July 2020

At present, the common wireless multimedia transmission systems are mainly based on mobile networks and wireless local area networks. Most of the devices work in the 2.4 GHz/5 GHz frequency band and have poor signal penetration capability, which is not suitable for complex environment applications. Meanwhile, Wireless mesh networks are characterized by self-organization, self-healing, multi-hop and so on. In this paper, we down-converted the 2.4 GHz Wi-Fi signal, designed and implemented a wireless mesh network architecture broadband wireless multimedia transmission system based on the IEEE 802.11s protocol, which works at 400 MHz, the open band I. The system consists of a mobile central node station and 15 simple mobile stations to form a self-organized network, realizing independent wireless multimedia transmission in complex environment. According to results, its signal can diffract most objects in real scenes, such as 2-storey basement and 3-storey above ground buildings, which has high mobility, high reliability and meets complex wireless environment applications such as complex buildings, basements, jungles, etc.
An Improved Particle Swarm Algorithm with Heuristic Factors and Empirical Operators
Authors: Gao Chao , Jiao Libin , Li Xiaofeng
Published: July 2020

An improved particle swarm algorithm (PSA) is proposed based on the universal framework of the intelligence optimization algorithms (IOA). Regarded as increment to the standard PSA, the improved PSA takes the essence of the standard PSA, and additionally utilizes various heuristic factors and different empirical operators introduced by multiple other IOA. The capability of global and local optimization can be strengthened by the free search, the differential evolution and the quantum rotation comprehensively. The genetic variation is adopted to avoid premature convergence, while the greed strategy is adopted to guarantee monotonous convergence. The numerical simulation indicates that the improved PSA achieves better performance than the standard PSA.
Study on Demonstration of Mulched Drip Irrigation in Maize Field under Surface Water in Mountain Area
Authors: Sun Xiaowei , Liu Yanhong , Wang Shuhong
Published: July 2020

In recent years, the technology of water-saving irrigation in agricultural irrigation is strongly supported and promoted. Plastic film mulching cultivation with Chinese characteristics has been widely promoted and applied in plain areas, but also is exploring researched in mountain area. In this paper, according to conditions of complex mountainous topography and elevation changes, mulched drip irrigation in maize field is designed and studied under surface water as water source. The reasonable optimization of design and obtained economic efficiency are also explained.