bluuebunny/crossref_metadata_2025 huggingface dataset:
Study of neutrons associated with neutrino and anti-neutrino interactions on water at T2K
Authors: Akutsu Ryosuke
Published: May 2021

The study of neutron production associated with v interactions on water in an energy region from sub-GeV up to a few GeV is a key ingredient to improve the physics program of neutrino experiments based on water Cherenkov detectors. To this aim, a precise prediction of such neutron production by Monte Carlo (MC) simulation is essential. However, current predictions have large uncertainties related to the modeling of v interactions in the nuclear medium, hadronic final-state interactions (FSI) in nuclei, and secondary interactions (SI) in the detector medium. Therefore, it is worth evaluating the validity of the simulations with v beam. In this work, the status of a measurement of v and

v
¯

interactions on water in Tokai-to-Kamioka (T2K) experiment is described.
Study of neutrino charged current interactions on iron in the NINJA experiment
Authors: Oshima H. , Shibuya H. , Ogawa S. , Matsuo T. , Morimoto Y. , Kosakai Y. , Mizuno K. , Takagi H.
Published: May 2021

Emulsion Cloud Chamber with 65kg iron target was exposed to the neutrino beam at J-PARC neutrino beam line in 2016. It is capable of detecting short proton tracks down to 200 MeV/c. Data presented in this document corresponds to 0.40×1020 POT. The 194 neutrino-iron charged current interactions were successfully reconstructed in the target. Numbers of protons and charged pions in the final state of each event were measured and compared with those of a Monte Carlo simulation.
The nEXO detector: design overview
Authors: Pocar Andrea
Published: May 2021

This report presents an overview of the design solutions adopted for the nEXO detector, a large enriched-liquid-xenon time projection chamber to search for the neutrinoless double beta decay (0v DBD) of 136Xe. The nEXO concept is inherited from EXO-200, the first 100-kg scale DBD experiment to produce physics results, which ran between 2010 and 2018 at the WIPP underground site in New Mexico. Important novel solutions were introduced for nEXO that ease some aspects of the scale-up and, most importantly, allow nEXO to achieve a > 100-fold higher sensitivity to 0v DBD than its predecessor.
T2K-WAGASCI: MIDAS-based DAQ software and online monitor for the readout of a large number of MPPCs
Authors: Giorgio Pintaudi
Published: May 2021

The WAGASCI project aims to perform a study of neutrino-nucleus interactions at the J-PARC accelerator in Japan with a new fine-grained neutrino detector (WAGASCI module) coupled with muon range detectors (WallMRD and BabyMIND).

The WAGASCI module main target for neutrinos is purified water. A hollow cuboid lattice made of scintillators bars is used to detect charged particles coming out of the neutrino interaction points. Measurements in wide phase space become possible by the combination of the WAGASCI modules, side and downstream muon range detectors. The downstream-MRD, the so-called BabyMIND detector, also works as a magnet and provides charge identification capability as well as magnetic momentum measurement for high energy muons.

The DAQ of the WAGASCI experiment is a modern DAQ that takes the object oriented paradigm to a new level of sofistication. Not only objects are exensively used, but the very architecture of the DAQ itself is modular, composed of many blocks indipendent from each other and with a clear external API. This makes adding new functionality quite easy and maintaing the software less time consuming.

Our DAQ is an hybrid made up of multiple packages, most notably MIDAS (a DAQ framework developed at TRIUMF and PSI), Pyrame (a frontend software developed at LLR) and the well-known ROOT (developed at CERN). It is the first attempt to merge MIDAS and Pyrame, in a hopefully armonic and organical way. This is because the official T2K DAQ software is MIDAS-based while the WAGASCI frontend electronics is supported by Pyrame only.
Search for event bursts in XMASS-I correlated with gravitational-wave events
Authors: Hiraide Katsuki
Published: May 2021

A large single-phase liquid xenon detector, XMASS-I, is a multi-purpose detector suitable for detecting particles with energy deposition in the wide energy range from keV to MeV under a low-background environment and was stably operating for more than 5 years since November 2013. We conducted a search for event bursts in the XMASS-I detector associated with gravitational-wave events. In this paper, we present a preliminary result on the search for event bursts in coincidence with the binary neutron star merger GW170817.
D-Egg: new optical sensors for the IceCube Upgrade and Gen2
Authors: Ishihara Aya
Published: May 2021

D-Egg (Dual optical sensor in an Ellipsoid Glass for Gen2) is a newly designed optical sensor for the IceCube Upgrade and IceCube-Gen2 to be deployed in glacial ice at the South Pole. The D-Egg is designed to follow the basic concept of the currently working IceCube optical sensors. On top of that, the photon detection efficiency to all directions is significantly enhanced with its upward and downward facing two 8” HQE PMTs in an UV transparent pressure resistant glass vessel and optical coupling elastomer. The photo-electron signals from the two PMTs are continuously sampled with fast ADCs and the FPGA takes the digital output, which allows deadtime-free flexible local triggering. Various calibration sensors and light sources are also embedded in the D-Egg vessel. In this contribution, we will report on the design of D-Egg to be deployed in the IceCube Upgrade array in 2022–23.
Physics Potential of the IceCube Upgrade
Authors: Ma Wing Yan
Published: May 2021

The IceCube Neutrino Observatory is a cubic-kilometer Cherenkov detector at the South Pole. The planned Upgrade project, which consists of seven new strings, will be deployed with densely spaced optical modules to improve the neutrino detection capability at a few GeV level. The goal of IceCube Upgrade is to provide world-leading sensitivity to neutrino oscillations and to take unique measurements of tau neutrino appearance with high precision. It also serves as a R&D platform for the future IceCube-Gen2 experiment. The newly designed DOMs will provide improved detection efficiency and directional resolution for Cherenkov photons. Furthermore, new calibration devices will be introduced which will provide a better understanding of the ice properties, thereby reduce the detector systematic uncertainties. The resulting calibration improvement from the Upgrade will be applied to the entire archival data of IceCube collected for more than 10 years, with an expected improvement of the angular and spatial resolution of the detected astrophysical neutrino events. The Upgrade can be regarded as the first stage in the development of IceCube-Gen2, the next-generation neutrino telescope at the South Pole.
Project 8: Measuring the tritium beta-decay spectrum using Cyclotron Radiation Emission Spectroscopy
Authors: Oblath Noah S
Published: May 2021

The goal of the Project 8 experiment is to measure the absolute neutrino mass using tritium beta decays and a new spectroscopic technique, Cyclotron Radiation Emission Spectroscopy (CRES). CRES has the potential for extremely low backgrounds and high precision. Phase I of Project 8 demonstrated that CRES could be used to detect single-electron cyclotron radiation and perform precision electron spectroscopy. We are in Phase II of the experiment, performing a 2-3-month measurement of the endpoint of the tritium spectrum. We will measure the last ~2 keV of the beta-decay spectrum, demonstrate our understanding of the systematic uncertainties, and explore the background rate at energies just above the endpoint. In Phase III we will demonstrate the ability to scale up the volume of the experiment, and to create a stable atomic tritium source, which will eventually avoid systematic uncertainties from the final states of the molecule. Phase IV will combine the critical factors of precision, size, and well-controlled systematic uncertainties to reach the final sensitivity of 40 meV. I will present the status of Project 8 Phase II and the plans for Phases III and IV.
Analysis strategies for the updated geoneutrino measurement with Borexino
Authors: Kumaran Sindhujha , Agostini M. , Altenmüller K. , Appel S. , Atroshchenko V. , Bagdasarian Z. , Basilico D. , Bellini G. , Benziger J. , Bick D. , Bonfini G. , Bravo D. , Caccianiga B. , Calaprice F. , Caminata A. , Cappelli L. , Cavalcante P. , Cavanna F. , Chepurnov A. , Choi K. , D’Angelo D. , Davini S. , Derbin A. , Di Giacinto A. , Di Marcello V. , Ding X.F. , Di Ludovico A. , Di Noto L. , Drachnev I. , Fiorentini G. , Formozov A. , Franco D. , Gabriele F. , Galbiati C. , Gschwender M. , Ghiano C. , Giammarchi M. , Goretti A. , Gromov M. , Guffanti D. , Hagner C. , Hungerford E. , Ianni Aldo , Ianni Andrea , Jany A. , Jeschke D. , Kumaran S. , Kobychev V. , Korga G. , Lachenmaier T. , Lasserre T. , Laubenstein M. , Litvinovich E. , Lombardi P. , Lomskaya I. , Ludhova L. , Lukyanchenko G. , Lukyanchenko L. , Machulin I. , Mantovani F. , Manuzio G. , Marcocci S. , Maricic J. , Martyn J. , Meroni E. , Meyer M. , Miramonti L. , Misiaszek M. , Montuschi M. , Muratova V. , Neumair B. , Nieslony M. , Oberauer L. , Onillon A. , Orekhov V. , Ortica F. , Pallavicini M. , Papp L. , Penek O. , Pietrofaccia L. , Pilipenko N. , Pocar A. , Raikov G. , Ranalli M.T. , Ranucci G. , Razeto A. , Re A. , Redchuk M. , Ricci B. , Romani A. , Rossi N. , Rottenanger S. , Schöinert S. , Semenov D. , Skorokhvatov M. , Smirnov O. , Sotnikov A. , Strati V. , Suvorov Y. , Tartaglia R. , Testera G. , Thurn J. , Unzhakov E. , Vishneva A. , Vivier M. , Vogelaar R.B. , von Feilitzsch F. , Wojcik M. , Wurm M. , Zaimidoroga O. , Zavatarelli S. , Zuber K. , Zuzel G.
Published: May 2021

Borexino is a 280-ton liquid scintillator detector located at the Laboratori Nazionali del Gran Sasso (LNGS), Italy and is one of the two detectors that has measured geoneutrinos so far. The unprecedented radio-purity of the scintillator, the shielding with highly purified water, and the placement of the detector at a 3800 m w.e. depth have resulted in very low background levels and have made Borexino an excellent apparatus for geoneutrino measurements. The analysis techniques of the latest geoneutrino results with Borexino were presented using the data obtained from December 2007 to April 2019, corresponding to an exposure of (1.12 ± 0.05) × 1032 protons × yr. Enhanced analysis techniques, such as an increased fiducial volume, improved veto for cosmogenic backgrounds, extended energy and coincidence time windows, as well as a more efficient α/β particle discrimination have been adopted in this measurement. The updated statistics and these elaborate resulted in a geoneutrino signal of

47.0

−
7.7

+
8.4

(
stat
)

−
1.9

+
2.4

(
sys
)

TNU

with

−
17.2

+
18.3

%

total precision.
Design and Status of JUNO
Authors: Steiger Hans Theodor Josef
Published: May 2021

The Jiangmen Underground Neutrino Observatory (JUNO) is a 20 kton multi-purpose liquid scintillator detector currently being built in a dedicated underground laboratory in Jiangmen (PR China). JUNO’s main physics goal is to determine the neutrino mass ordering using electron anti-neutrinos from two nuclear power plants at a baseline of about 53 km. JUNO aims for an unprecedented energy resolution of 3% at 1 MeV for the central detector, with which the mass ordering can be measured with 3 – 4 σ significance within six years of operation. Most neutrino oscillation parameters in the solar and atmospheric sectors can also be measured with an accuracy of 1% or better. Furthermore, being the largest liquid scintillator detector of its kind, JUNO will monitor the neutrino sky continuously for contributing to neutrino and multi-messenger astronomy. JUNO’s design as well as the status of its construction will be presented, together with a short excursion into its rich R&D program.
AXEL : High pressure Xe gas TPC for neutrinoless double-beta decay search
Authors: Ban Sei
Published: May 2021

AXEL is a high pressure xenon gas TPC with a unique cellular readout structure, ELCC (Electroluminescence Light Collection Cell), for neutrinoless double-beta (0vββ) decay search. We developed two prototype detector and evaluated them. The small size prototype detector (10-L pressure vessel) is constructed first and evaluated its performance to demonstrate the concept of the ELCC. The large size prototype detector (180-L chamber) are being developed to get the know-how for enlargement and for background study. The estimated energy resolutions at the Q-value of 0vββ decay of 136Xe are 0.82~ 1.74% for the former prototype and 0.67% for the latter.
Gravitational-Wave Observations by Advanced LIGO and Virgo
Authors: Schmidt P
Published: May 2021

From September 2015 until August 2017, the Advanced LIGO and Virgo gravitational-wave detectors conducted their first two observing runs O1 and O2. Since the milestone detection of gravitational waves from two coalescing black holes, GW150914, a further nine binary black holes collisions as well as one binary neutron star inspiral have been identified, firmly establishing the field of gravitational-wave astronomy. After a commissioning break, the third observing run commenced on April 1, 2019 which has since seen the public announcement of several tens of gravitational-wave candidate events. In this proceedings, we summarise the observations during O1 and O2 and briefly discuss the current status.
Global control using a laser strainmeter for KAGRA
Authors: Miyo Koseki
Published: May 2021

The KAGRA is a large-scale laser interferometric gravitational wave (GW) telescope that is has been constructed in Japan’s underground. Underground telescopes such as KAGRA and the proposed Einstein Telescope have the advantage of substantially reduced seismic noise above 1 Hz relative to GW telescopes on the surface. However, even in underground, seismic motion at low frequencies such as microseisms (< 1Hz) and earthquakes (< 10mHz), could severely degrade GW telescopes’ stability. In the current design of the KAGRA, these disturbances are suppressed by feedback controls using inertial sensors such as seismometers and geophones. Nevertheless, suppression with this control method is limited by the insufficient sensitivity and tilt-horizontal coupling of the sensors at low frequencies. In this paper, we have developed a new control method based on a laser strainmeter named the Geophysics Interferometer (GIF) to resolve this problem. This was installed in the KAGRA tunnel and has a superior sensitivity of less than 100 mHz and no problems with tilt coupling. This new method will achieve improved stability for the operation of an interferometer. Also presented in the paper is the design of the control system and an experimental result.
Research on Innovation and Entrepreneurship Education for College Students from the Perspective of Big Data
Authors: Wang Feng
Published: May 2021

Information technology promotes the wide application of big data and causes the constant reform of the teaching mode in colleges and universities. How to make college students adapt to the changeable market environment and improve the effect of innovation and entrepreneurship education has become a topic. Analyze the current situation of college students’ innovation and entrepreneurship education through big data. This paper analyzes college students’ professional ethics, job-hunting concept, innovation and practice ability cultivation, creative thinking, entrepreneurial psychological bearing ability, entrepreneurial core competitiveness, innovation and entrepreneurship comprehensive quality, etc. Through the analysis of the current situation of college students’ innovation and entrepreneurship education, we find out the positive influencing factors and consolidate and improve them. In view of the negative influence factors, this paper puts forward reform ideas and countermeasures. From the government, schools, teachers and students, the society summed up the innovation and entrepreneurship education model, to establish a set of constantly improved innovation and entrepreneurship curriculum system. In this way, the innovative and entrepreneurial talents training scheme adapted to the changing times can be formed and the healthy development of talents can be promoted.
Adversarial network embedding on heterogeneous information networks
Authors: Lan Ting , Wu Changxuan , Yu Chunyan , Wang Xiu
Published: May 2021

Network embedding has been proven to be helpful for solving real-world problems. Moreover, real-world networks are often heterogeneous information networks(HINs). In this paper, we propose a new adversarial framework for heterogeneous network embedding, namely AGNE-HIN. AGNE-HIN can learn latent code distribution in the network through a generative adversarial way. What’s more, to reduce the global smoothness of the embedded vector caused by GAN, we apply perturbation to the input to form adversarial data. Experimental results verify our design and demonstrate the effectiveness of the proposed method in node clustering, link prediction and similarity ranking tasks.
BSEN: A BiSiamese Entity Normalization Method for Biomedicine
Authors: Peng Zirong , Yu Qinyong , Yang Hui , Wang Yongli
Published: May 2021

Normalization of named entities in the field of biomedicine is an important task in biomedical text data mining. Compared with other tasks in biomedical text mining research, there are relatively few researches on entities normalization. In this article, a BiSiamese entity normalization method for biomedicine (BSEN) is proposed. Firstly, the text similarity algorithm is analyzed, and an improved similarity measurement algorithm for biomedical inverse text frequency and cosine (BIC) is proposed. Secondly, the data set is trained in pairs using BiSiamese network and combined with BIC to calculate text similarity. The entity corresponding to the maximum similarity calculated in the normalization knowledge base is the normalized result obtained by the BSEN method. The verification experiments on the verification data set show that the BSEN has achieved better normalization results than the existing methods.
The Design of the Electromyography Sensor with the Modifying Circuit
Authors: Zou Xiangxin
Published: May 2021

The project is about using the Electromyography (EMG) sensor to display the muscle movement and use connecting circuit to modify the signal from the EMG sensor. The modifying circuit connected to the EMG sensor include the amplifier circuit to amplify the signal, the filter to remove the DC offset and the high frequency noise, the rectifier for the positive swing of the signal and the envelope detector to smooth the signal. The circuit is designed according to the signal amplitude and the frequency spectrum and is simulated on the Multisim and have the output. The actual circuit is built as in the simulation and the signal is from the electrode. The output is in audiovisual and performance of the EMG sensor circuit is demonstrated by experiment. The design of the EMG in the project uses the simple component in electronic circuit with the desired output. The display of the EMG sensor in the project is audiovisual which provides the user with output format both in visual and in audio that allows hearing disability and visual disability users to use the EMG sensor.
Analysis of driver’s choice behavior based on the combined model of utility-regret
Authors: Kang Jun , Huang Shan , Duan Zongtao , Zhang Fan
Published: May 2021

In the context of increasing urban traffic trajectory data, based on large-scale urban traffic trajectory data, in the field of intelligent transportation, it has become an urgent need to analyze travelers’ routing behaviors and establish effective routing models to provide travelers with efficient and reasonable driving route recommendations. It is often the case that urban taxi groups has better route choice behavior than other travel group under the cost-benefit constraints. Therefore, providing route recommendations for other travelers according to the route choice habits of urban taxi group is a feasible solution to the above need. This paper starts with the utility maximization model and the stochastic regret minimization model, for the problem that the traveler cannot satisfy the premise of the complete rationality of the utility maximization model when choosing routes and the random regret minimization model ignores the traveler’s sensitivity to the original value of the alternative attribute, and improve the calculation formula of the regret value in the random regret minimization model. A route choice model under the utility-regret combination rule is proposed based on the combination of the utility model and the improved regret model, and then, based on the historical trajectory data of taxis in Xi’an, the RP data required by the model is extracted, and the parameters of the model are estimated and verified. The experimental results show that the route choice probability calculated by the model is closer to the route choice probability in the real scene than the simple utility maximization model or the simple random regret minimization model.
Research of the effect of severe plastic deformation with the following ion nitriding on the thickness and microhardness of the hardened layer of tool steel R6M5
Authors: Asylbaev A V , Vafin R K , Khairetdinov E F , Shaikhutdinova L R , Mamontov D V , Sklizkov I D , Sunagatova L M
Published: May 2021

In this work we consider the issue of influence of initial state of tool steel P6M5 surface on thickness and microhardness of hardened layer during ion nitriding in the glow discharge. It is established that the application of intense plastic deformation torsion before ion nitriding in the glow discharge increases the rate of nitrogen diffusion deep into the tool steel R6M5, and increases the thickness of the hardened layer by 2.5 times.
Hardening ion plasma coatings (Ti, Alx)N (x = 3 at. %) for carbide cutting tools
Authors: Blinkov I V , Belov D S , Volkhonskiy A O , Chernogor A O , Sergevnin V S
Published: May 2021

Coatings (Ti, Al0,03)N and comparison samples – coatings (Ti, Al0,25)N and TiN are formed by the arc-PVD method on the WC-Co carbide alloy. The phase composition, the substructure characteristics and the mechanical properties of the coatings were investigated. The addition of Al and its increase in the coating composition is accompanied by a decrease in the value of the lattice parameter, refinement of the coatings subgrain structure and an increase in both microstrains and macrostresses. At the same time, the hardness of the coatings and the values of the parameters H3/E2 and H/E increase with a decrease in the relative work of plastic deformation of the samples, which is a characteristic of their viscosity. Durability tests were carried out using a cutting tools with the investigated coatings showed the advantage of the (Ti,Al0.25)N coating in continuous turning operations. The (Ti,Al0.03)N coating is characterized by increased resistance compared to other tested coatings in milling operations and compared to TiN coating in continuous cutting.
Investigation of the properties of coatings obtained by micro arc oxidation of magnesium alloy in alkaline electrolyte
Authors: Kondratsky I O , Medvetskova V M , Appelfeld A B , Krit B L
Published: May 2021

The problem of studying the properties of coatings obtained by micro arc oxidation of a magnesium alloy in an alkaline electrolyte is considered.
Measurement of nonlinear elasticity depending on the applied static load by the acoustic method in gel-like media
Authors: Krit TB
Published: May 2021

An algorithm has been developed for measuring the shear modulus in an anisotropic media – along and across the organic or artificial fibers that cause the anisotropy. The algorithm is based on the well-known and widely used method for generating shear waves in homogeneous isotropic media. Shear modulus depending on the static load applied to the studied media is shown. It tends to grow nonlinearly as the load increases.
Electrochemical study of Zr-1Nb alloy with oxide coatings formed by plasma electrolytic oxidation
Authors: Savushkina S V , Gerasimov M V , Apelfeld A V , Sivtsova G V , Bogdashkina N L , Ignatenko V E , Suminov I V , Vinogradov A V
Published: May 2021

Plasma electrolytic oxidation (PEO) coatings were formed on Zr-1Nb alloy in electrolyte containing 9 g/L sodium silicate, 5 g/L sodium hypophosphite, and 6 g/L submicron yttrium oxide powder at current densities 20, 30, and 40 A/dm2. The coatings surface morphology was studied by scanning electron microscope. The electrochemical behavior of coated and uncoated samples was investigated after 1-and 7-days exposure in 10 % HCl. The samples with PEO coatings formed at 30 A/dm2 current density had the best corrosion protective properties after 1-day exposure in 10 % HCl. After 7-days exposure in 10 % HCl the samples with PEO coatings formed at 30 and 40 A/dm2 current densities showed greater corrosion resistance then samples with PEO coatings formed at 20 A/dm2 current density and uncoated samples.
Application of variational calculus for optimization of optic gradient coatings
Authors: Schitov N N
Published: May 2021

The design optimization for n-graded optic coatings based on variational calculus is discussed. In order to exemplify the approach, the Lagrange problem for minimizing refraction is stated and solved. The refraction law is generalized for alteration of the continuous refraction index. To solve problems of reflection minimization, an integro-differential equation of retarding potentials is proposed to use as a condition to the nonholonomic Lagrange problem.
Influence of Ni on electrochemical resistance of tribo-adaptive Ti-Al-Mo-N coatings
Authors: Sergevnin V S , Demirov A P , Belov D S , Chernogor A V
Published: May 2021

Electrochemical behavior of Ti-Al-Mo-N coatings before and after addition of Ni in amount of 1 and 2 at. % was investigated in alkaline and acidic media. Ni resulted in decrease in the corrosion current an alkaline media and reduction of oxygen concentration in the coating material after electrochemical test. It was found that addition of Ni to Ti-Al-Mo-N coatings with high molybdenum content increases the resistance to dissolution in alkaline media, but does not have a significant positive effect on their resistance in acidic environments.
Investigation of the influence of laser treatment modes on coatings of aluminum, nickel, nickel-titanium systems
Authors: Makarov A M , Gerashchenkov D A , Kuznetsov P A , Ryabov V. V. , Vasiliev O S
Published: May 2021

This paper shows the effect of different modes of laser treatment on the final structure of the coating obtained by the CS method. Among the studied modes, the following were selected: the speed of movement of the laser spot, defocused or focused laser beam, continuous or pulsed mode of laser treatment. The CS coatings of systems Ni, Ni-Ti, Al have been investigated. It is shown that under pulsed and defocused modes, the resulting coatings have cracks and other types of defects. It is also shown that the microhardness of CS coatings after laser treatment with a laser beam increases: 8 times for the Al system, 3 times for the Ni-Ti system, and does not increase for the Ni system.
Influence and Application of Big Data Analysis in Product Design Research
Authors: Yang Fan
Published: May 2021

Design research is an important work in product design. Through a series of data collection and data analysis, we can better adjust the design scheme. The traditional product design research mode data analysis effect is not good, through the Big Data(BD) technology research and analysis of product design, is a good solution at present. Therefore, this paper establishes the research on the influence and application of BD analysis in product design research. In this paper, the product design research and the application of BD analysis technology in the design research are deeply studied and analyzed. It is believed that through the BD technology, the research content can be analyzed more scientifically, so as to improve the overall product design effect. In order to make the BD analysis technology better applied in product design research, this paper optimizes and improves the evaluation crowd weight calculation method of entropy processing, which effectively improves the accuracy of the algorithm. In order to further verify the application effect of BD analysis in product design research; this paper establishes a test experiment with “mobile power supply” as the product. The experimental results show that among the tested users, young people aged 15-20 are the main ones, accounting for 38.7%. According to the analysis of users’ interests and hobbies, the highest proportion of digital options is 31.2%. The analysis shows that the results of BD analysis provide valuable reference for the formulation and adjustment of product design strategy.
Numerical Simulation of Soft Rock Creep Behavior under Coupling Influence of Temperature and Stress
Authors: Wang Hongwei
Published: May 2021

In order to investigate the deformation law of deep surrounding rock under the coupling influence of temperature, cracks and stress. We take the temperature, initial damage and confining pressure into consideration to simulate the deformation of deep surrounding rocks after mining. The numerical simulation of the creep characteristics of deep tunnel can be sum up as follows: a) the increase of temperature makes the strength decrease and the increase deformation of rock mass; b) With the increase of confining pressure, the anti-deformation ability of rock mass is enhanced and the failure mode of rock mass changes from brittle failure to plastic failure; c) The existence of cracks reduces the strength of rocks and intensifies the deformation of rocks; d) the stress in the tunnel mainly concentrates on the tip of the initial cracks and the existence of defects aggravates the deformation inside the tunnel.
Research on the influence of spindle temperature rise of drilling and tapping machine on machining accuracy
Authors: Yu Lianzhou , Xing Zhihui , Gao Mingming , Shang Li
Published: May 2021

With the progress of science and technology, the improvement of product performance, as well as the improvement of user’s requirements for product experience, the accuracy of machine tools and equipment is required to be higher and higher. Spindle is an important component of high-speed drilling and tapping machine. The change of its temperature directly affects the accuracy of machining size and appearance of machine equipment. This paper mainly studies the causes of spindle temperature rise and the methods to prevent excessive temperature rise.
Bionic fish design with coordinated propulsion of pectoral and caudal fins
Authors: Miao Fengyi , Peng Lijun , Wu Jiaxu , Shi Ting , Gao Xian , Hu Ruan , Qi Jingyuan , Gao Xinchi , Mei Jie
Published: May 2021

The continuous development of the aquaculture industry is accompanied by a large amount of aquaculture wastewater discharge, which brings a series of environmental protection problems. With the call for the construction of high-quality modern marine pastures, it is imperative to enhance the research and development capabilities of marine observation/monitoring equipment and pollution reduction/monitoring equipment. At present, underwater submersibles have the characteristics of complex structure and high concealment requirements. As a typical combination of robotics and bionics, the bionic robotic fish has the characteristics of high swimming efficiency, strong mobility, and strong concealment. This project will apply the bionic robotic fish to the field of pasture construction and monitoring in oceans and other waters. A bionic fish with coordinated pectoral and caudal fins.
Physical-mechanical performance of bamboo scrimbers made from Bambusa rigida
Authors: Zhang You , Li Feng , Zhang Xuelun , Qiu Chongpeng , Liang Ting , Peng Xiaopeng , Huang Xingyan
Published: May 2021

Bamboo scrimbers (BCs) with excellent performances were made from Bambusa rigida (2 to 5 years old). It was found that BCs made from 3-year-old bamboo have the smallest thickness swelling (TS) and width swelling (WS). BCs prepared from 4-year-old bamboo has the maximum compressive strength (CS) and horizontal shear strength (HSS). The maximum modulus of rapture (MOR) and modulus of elastic (MOE) of BCs were observed in BCs made from bamboo with age of 5 years. Overall, the resin dosage of 11% was optimized to fabricate BCs with different maturing bamboo culms; 4-year-old bamboos were recommended to be used as the raw material for the production of BCs.
Application of the precision industrial measurement technology in geometric measurement
Authors: Hu Chang’an , Li Wanze , Zhou Yang , Du Wenbo , Peng Yuanhui , Li Jiangang
Published: May 2021

In recent years, for expanding the productivity and improving the market competitiveness, some methods are carried out, which include new technology, new process, new materials and so on, to constantly improve the precision of geometric measurement in the manufacturing field. In addition to this, a large number of the advanced manufacturing equipment has also been used. In the case of rich field experience, this paper mainly introduces the application of laser tracker, laser interferometer, joint arm type coordinate measuring machine, three-dimensional contour optical scanning measuring instrument in robot, automobile fixture, ground penetrating radar, special-shaped parts scanning and so on.
Analysis and Practice of Jiangsu Expressway Centralized Maintenance Mode
Authors: Wang Hongxiang
Published: May 2021

Under the traditional maintenance mode, the contradiction between maintenance operations and traffic has negative effects on maintenance safety, efficiency, quality and benefits, and the centralized maintenance mode can effectively solve this problem. Based on the practical experience of the Jiangsu Expressway Centralized Maintenance Project, this paper summarizes the significance of carrying out the centralized maintenance of expressways, and systematically analyzes the applicability of the centralized maintenance mode from the two aspects of project requirements and external conditions. Not all expressway maintenance projects are applicable. In order to adopt the centralized maintenance mode, it is necessary to combine the construction operation content of the project and the external construction environment to make scientific decisions. Finally, taking the Shanghai-Nanjing Expressway Centralized Maintenance Project as an example, it introduces the construction organization and management characteristics of the Shanghai-Nanjing Centralized Maintenance Mode and the successful experience of the design scheme for traffic diversion of high-volume expressways, in order to provide a certain reference value for similar projects.
Application Research of Online Sensing Technology of Dynamic Capacity Increase
Authors: Chen Li Hui , Feng Yang , Yuan Fu Zhong , Ye Cui Rong
Published: May 2021

With the continuous development of my country’s national economy, the demand for electricity in various regions continues to increase, and the operation of high-voltage overhead transmission lines in many regions is already facing transmission bottlenecks. Therefore, it is very important to study the dynamic capacity increase technology of high-voltage overhead lines. This article points out the main technologies and methods to increase the transmission capacity of transmission lines, analyzes the advantages and disadvantages of each technical method, evaluates the advantages and limitations of dynamic capacity expansion technology and economic feasibility, and finally proposes that dynamic capacity expansion technology is developing. The existing problems and the future development trend point out the broad application prospects and important practical significance of the research on the new capacity-increasing wire of the online state-aware technology.
Research on Application of BIM+GIS Technology in Building Life Cycle
Authors: Wu Bei , Zhou Rui , Long Yu , Cai Xinyue , Li Bingnan
Published: May 2021

Based on a project, the application of BIM+GIS technology in the whole life cycle of the project building is studied. Selecting the image data based on the fusion of UAV tilt photography and panoramic data, a controllable data management platform is established. In the planning and design stage, the use of technology can reduce the frequency of exploration, check the project for design errors, reduce the number of rework of the project, improve work efficiency. In the construction phase, funding for large-scale projects through image data, using BIM Technology to simulate construction progress, collision check, etc. Reduce the waste of resources; in the operation and maintenance phase, through the management of the information data of the BIM model, so as to provide data support for the maintenance and other work in the later stage of the project.
Process Defects and Failure Analysis Methods of Crystal Oscillator
Authors: Liu Cong , Gao Yancai , Cai Xiuming , Zhou Wenjuan , Zou Jinlin
Published: May 2021

The common failure modes of crystal oscillators are vibration stop, waveform abnormality and frequency drift, there are many failure mechanisms, some of which are related to process defects, such as chip process defects, module packaging process defects and crystal process defects. In order to discover the process defects, summarize the performance, appearance, reason and failure analysis methods of its common process defects is necessary. Introduced several common process defects of current SMD crystal oscillators and corresponding analysis methods through specific case analysis.
Correlative Analysis Method and Its Application in Highway Slope Engineering
Authors: Zhu Weiwei , Tan Yangyang , Liu Chunli
Published: May 2021

Highway slope engineering is faced with a large number of information elements, and the complicated relationship between these information elements makes the slope stability evaluation very difficult. This paper introduces the correlative analysis method of Extenics, and puts forward the concept of “slope stability correlative chain”. Starting from matter-element M=(slope, stability, v), the slope stability correlative network is established. The case analysis shows that the correlative analysis method can help to analyze the stability of highway slope, and has great engineering application value.
Implicative Analysis Method and Its Application in Slope Engineering
Authors: Zhu Weiwei , Tan Yangyang , Liu Chunli
Published: May 2021

Slope design must be multi-objective design. In addition to ensuring the slope stability, it is also necessary to achieve other goals such as landscape construction and environmental protection. Slope design is full of various contradictions. Implicative analysis method is a kind of analysis methods in Extenics. The analysis of engineering case shows that using the implicative analysis method in Extenics to assist in dealing with contradictions in slope engineering design can obtain effective solutions and help technicians get rid of excessive dependence on engineering experience and design inspiration.
Research on the method of extrapolating 3D particle profile from 2D Fourier spectrum
Authors: Zheng Shanxi , Zheng Jiagen , Guo Xia , Sun Bingqi , Shi Chong
Published: May 2021

Based on 2D Fourier analysis, a shape extrapolation method of 3D geotechnical particles with arbitrary roughness is proposed, and the control conditions are discussed. It is realized that the two-dimensional profile is randomly constructed by Fourier description, then the three-dimensional particles are extrapolated using the profiles of multiple sections, lastly the 3D random particles can be generated which are close to the actual particle’s area, volume, roundness and other morphological characterization parameters; and particles with different accuracy can be constructed by controlling the number of sections. This method can provide help for the discrete element numerical calculation of particles.
New Method of Airport Pavement Health Inspection Based on MobileNet-SSD and Mask R-CNN
Authors: Guo Wentong , Fang Hongyuan , Wang Niannian
Published: May 2021

This paper presents a rapid detection and pixel size measurement method for airport pavement apparent disease and Foreign Object Debris. Firstly, MobileNet-SSD algorithm is used for object identification. Then Mask R-CNN algorithm is used to segment the target image and measure the pixel size of the target object. Finally, the detailed information of the target object is obtained. The experimental verification shows that the recognition speed of this method reaches 65 frames per second, and the pixel segmentation accuracy reaches 96 %, which can meet the requirements of airport pavement health inspection.
Research on the Influence of Unstable Incoming flow Parameters on DPF Regeneration Performance
Authors: Li Lu , Zhao Zhichao , Wang Yi , Meng Zaiqiang , Liu Qi
Published: May 2021

Based on the simulation software, a regeneration simulation model of diesel particulate filter (DPF) was established, and the influence of unstable incoming flow parameters on its regeneration performance was studied. The results show that when the incoming flow is in an unstable state, the maximum temperature and maximum temperature gradient are lower than the steady state regeneration, with decreased regeneration efficiency. When the incoming flow temperature is in an unsteady state, 550°C is the critical temperature. When the incoming flow temperature is lower than 550°C, the maximum temperature and the maximum temperature gradient are higher than the steady state regeneration. When the incoming flow temperature is higher than 550°C, the maximum temperature and the maximum temperature gradient has little difference, with regeneration efficiency higher than that of steady state regeneration. When the oxygen concentration of incoming flow is in an unstable state, the maximum temperature is higher than the steady state regeneration. The maximum temperature gradient is higher than the steady state regeneration when the oxygen concentration is lower than 15%, and the difference is not significant, and vice versa, with the regeneration efficiency higher than the steady state regeneration.
Heat dissipation performance of a heat pipe radiator with rectangular longitudinal fin under natural convection
Authors: Qu Pengyang , Li Wei , Dong Yu , Tao Hanzhong , Cheng Jianjie , Li Yannan
Published: May 2021

To solve the cooling problem of electronic equipment with small heat dissipation area under high uneven power, this paper presents a natural convection radiator with L-shaped heat pipe and rectangular longitudinal fin module. The radiator has the advantages of compact structure, flexible layout, and didn’t occupy the side space due to the structural advantages. A numerical study was carried out, and the results are in good agreement with the experimental results. The thermal performance of the rectangular longitudinal fin module is also studied, the radiation heat loss of the fins accounts for about 25% of the total heat dissipation. The temperature and velocity vector distribution near the fin was analysed to research the influence of flow characteristics on the heat transfer of the fin. Additionally, the numerical results also show that the fin heat sink has an optimal fin height, which is 14mm.
Research on the Application Status and Improvement of Modern Technology of Electronic Information Engineering
Authors: Ye Jingjing
Published: May 2021

The in-depth application of modern technology in modern electronic information engineering has greatly changed people’s lives and work, and its convenience is very strong. However, it can also be seen from practical applications that there are still some problems that have not been resolved. This article summarizes the application status of modern electronic information engineering technology based on previous work experience. The author discusses how to improve the modern technology of electronic information engineering from five aspects: how to create a good market order, how to optimize the development environment, how to strengthen the modern innovation level of electronic information engineering, how to train professional and technical personnel, and how to increase support.
Study on the Application Characteristics and Future Development Situation of Electronic Information Technology
Authors: Xu Hongxia
Published: May 2021

At present, under the macro background of intelligence and networking, electronic information technology has been widely used in many industries. The key technical advantage of electronic information technology is to automatically control the whole operating system, so as to ensure that system operators can adjust the system operation process by means of intelligent automatic system control devices, thus achieving the effect of correcting system operation and operation errors in time and saving technical cost resources in automatic system adjustment and control. When researching and exploring electronic information technology, the basic idea is to combine the practical application characteristics of electronic information technology and improve the means of developing electronic information technology at the present stage.
Prediction of sand mold cutting force and identification of cutting force coefficients
Authors: Ming-Peng Hou , Zhong-De Shan , Xiao-Li Dong , bin Ding
Published: May 2021

Patternless casting technology is an advanced digital forming technology. Sand mold cutting is one of the most important techniques of patternless casting technology. In the process of sand mold cutting, the cutting force is the key factor affecting the quality of sand mold machining, and is an important prerequisite for the optimization of cutting parameters and the study of cutting stability. The accuracy of the cutting force prediction model depends largely on the identification of the cutting force coefficient. In the average cutting force model, the cutting force coefficient is considered as a constant. For identification of sand mold cutting force coefficient, a series of resin sand cutting experiments have been conducted in this paper, fixing spindle speed and depth of cutting, linearly changing the feed per tooth to measure the cutting forces, the tangential and radial cutting force coefficient are calculated by linearly fitting experimental data. The analysis results show that with the change of the cutting parameters the resin sand cutting force coefficient is basically the same.