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Study on the Teaching of Fundamentals of Manufacturing Technology in Independent college——Take the college of Arts & science of Jianghan University as Example

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Study on the Teaching of Fundamentals of Manufacturing Techn...

Preliminary Design of a System for Picking up Audio-Signals From Bubble Detectors GAO Si-ze1,NI Bang-fa,ZHANG Gui-ying,XIAO Cai-jin,LIU Cun-xiong, CHEN Zhe1,NIE Peng,LIU Chao1,ZHAO Chang-jun (1.college of Physics science and Engineering Technology,Guang

2013年教育技术与管理科学国际会议

作者： Li Congquan Fan Chaoyi Department of electromechanics and Architecture college of Arts & science of Jianghan University

The teaching of manufacturing technology has been researched according to the situation of independent college. That be strict with students and concise key contents could bring good effect in class. Mechanical processing video can add engineering background .Reform the examination can reduce examination malpractice, can promote the ability of operation, and can deepen the understanding of the text. The network technology does help to teach and communicate conveniently. Encourage students to participate professional contest brings professional atmosphere. The teaching mode cultivates the students’ independent thinking and practical ability. The effects play a good foundation for professional study.

关键词： independent college mechanical manufacturing teaching practical ability

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Preliminary Design of a System for Picking up Audio-Signals ...

Finite-time stabilization of nonlocal Lipschitzian stochastic time-varying nonlinear systems with Markovian switching

作者： GAO Si-ze NI Bang-fa ZHANG Gui-ying XIAO Cai-jin LIU Cun-xiong CHEN Zhe NIE Peng LIU Chao ZHAO Chang-jun college of Physics science and Engineering Technology Guangxi University

This system is designed to pick up sound signals from large volume,low-threshold energy, low-background superheated droplets bubble detectors.A sound-sensitive bubble detector is composed of a container filled with a mixture of superheated droplets and gel,a temperature and pressure control system,and an audio acquisition system attached on the outer surface of the container.The superheated droplets are in a metastable and superheated state at ambient temperature and pressure.When the outside

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science China(Information sciences) 2022年第11期65卷 196-216页

作者： Gui-Hua ZHAO Shu-Jun LIU College of Science University of Shanghai for Science and Technology college of Mathematics Sichuan University

In this study, we investigate the stochastic finite-time stability theory and finite-time stabilization of stochastic time-varying nonlinear systems with Markovian switching in the sense of weak solutions. First,we present the stochastic finite-time stability theory under the framework of weak solutions: the existence of weak solutions and stochastic finite-time stability theorems for stochastic time-varying nonlinear systems with Markovian switching. Second, for a class of high-order stochastic nonlinear systems with Markovian switching, a finite-time stabilization controller is constructively designed, and the trivial weak solution of a closed-loop system is proven to be globally finite-time stable in probability. The effectiveness of the proposed finite-time control method is illustrated by a numerical example.

关键词： stochastic time-varying nonlinear systems Markovian switching weak solutions stochastic finite-time stability finite-time control

THE NONLINEAR BOUNDARY VALUE PROBLEM FOR k HOLOMORPHIC FUNCTIONS IN C2

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Acta Mathematica Scientia 2023年第4期43卷 1571-1586页

作者：崔艳艳李尊凤谢永红乔玉英 college of Mathematics and Statistics Zhoukou Normal University College of Science Hebei University of Science and Technology college of Mathematics and Information science Hebei Normal University

k holomorphic functions are a type of generation of holomorphic functions. In this paper, a nonlinear boundary value problem for k holomorphic functions is primarily discussed on generalized polycylinders in C2. The existence of the solution for the problem is studied in detail with the help of the boundary properties of Cauchy type singular integral operators with a k holomorphic kernel. Furthermore, the integral representation for the solution is obtained.

关键词： k holomorphic functions boundary value problems Cauchy type singular integral operators 32A30 30C45

Influence of dissipation on solitary wave solution to generalized Boussinesq equation

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Applied Mathematics and Mechanics(English Edition) 2023年第3期44卷 477-498页

作者： Weiguo ZHANG Siyu HONG Xingqian LING Wenxia LI College of Science University of Shanghai for Science and TechnologyShanghai 200093China

This paper uses the theory of planar dynamic systems and the knowledge of reaction-diffusion equations,and then studies the bounded traveling wave solution of the generalized Boussinesq equation affected by dissipation and the influence of dissipation on solitary waves.The dynamic system corresponding to the traveling wave solution of the equation is qualitatively analyzed in detail.The influence of the dissipation coefficient on the solution behavior of the bounded traveling wave is studied,and the critical values that can describe the magnitude of the dissipation effect are,respectively,found for the two cases of b_30 in the equation.The results show that,when the dissipation effect is significant(i.e.,r is greater than the critical value in a certain situation),the traveling wave solution to the generalized Boussinesq equation appears as a kink-shaped solitary wave solution;when the dissipation effect is small(i.e.,r is smaller than the critical value in a certain situation),the traveling wave solution to the equation appears as the oscillation attenuation solution.By using the hypothesis undetermined method,all possible solitary wave solutions to the equation when there is no dissipation effect(i.e.,r=0)and the partial kink-shaped solitary wave solution when the dissipation effect is significant are obtained;in particular,when the dissipation effect is small,an approximate solution of the oscillation attenuation solution can be achieved.This paper is further based on the idea of the homogenization principles.By establishing an integral equation reflecting the relationship between the approximate solution of the oscillation attenuation solution and the exact solution obtained in the paper,and by investigating the asymptotic behavior of the solution at infinity,the error estimate between the approximate solution of the oscillation attenuation solution and the exact solution is obtained,which is an infinitesimal amount that decays exponentially.The influence of the dissipation coefficient on the ampli

关键词： generalized Boussinesq equation influence of dissipation qualitative analysis solitary wave solution oscillation attenuation solution error estimation

Dietary dimethylglycine sodium salt supplementation alleviates redox status imbalance and intestinal dysfunction in weaned piglets with intrauterine growth restriction

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Animal Nutrition 2022年第3期10卷 188-197页

作者： Kaiwen Bai Luyi Jiang Qiming Li Jingfei Zhang Lili Zhang Tian Wang college of Animal science and Technology Nanjing Agricultural UniversityNanjingChina college of Animal science Zhejiang UniversityHangzhouChina

There are few studies on the mechanism of redox status imbalance and intestinal dysfunction in intrauterine growth restricted(IUGR)newborn piglets.Here,we investigated the mechanism of jejunum dysfunction in weaned piglets with IUGR and the mechanism through which dimethylglycine sodium salt(DMG-Na)supplementation improving the imbalance of their redox status.In this work,a total of 10 normal birth weight(NBW)newborn piglets and 20 IUGR newborn piglets were obtained.After weaning at 21 d,they were assigned to 3 groups(n=10/group):NBW weaned piglets fed standard basal diets(NBWC);one IUGR weaned piglets fed standard basal diets(IUGRC);another IUGR weaned piglets from the same litter fed standard basal diets plus 0.1%DMG-Na(IUGRD).The piglets in these 3 groups were sacrificed at 49 d of age,and the blood and jejunum samples were collected immediately.The growth performance values in the IUGRC group were lower(P<0.05)than those in the NBWC group.Jejunum histomorphological parameters,inflammatory cytokines,and digestive enzyme activity as well as serum immunoglobulin were lower(P<0.05)in the IUGRC group than those in the NBWC group.Compared with these in the NBWC group,the redox status of serum,jejunum,and mitochondria and the expression levels of jejunum redox status-related,cell adhesion-related,and mitochondrial function-related genes and proteins were suppressed in the IUGRC group(P<0.05).However,compared with those in the IUGRC group,the growth performance values,jejunum histomorphological parameters,inflammatory cytokines,digestive enzyme activity,serum immunoglobulin,redox status of serum,jejunum,and mitochondria,and the expression levels of jejunum redox status-related,cell adhesion-related,and mitochondrial function-related genes and proteins were improved(P<0.05)in the IUGRD group.In conclusion,dietary DMG-Na supplementation alleviates redox status imbalance and intestinal dysfunction in IUGR weaned piglets mainly by activating the sirtuin 1(SIRT1)/peroxisome proliferatoractivated receptorgcoactivator-1a(PG

关键词： Intrauterine growth restriction Weaned piglet Jejunum Redox status Mitochondrial function Dimethylglycine sodium salt

Android Malware Detection Method Based on Permission Complement and API Calls

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Chinese Journal of Electronics 2022年第4期31卷 773-785页

作者： YANG Jiyun TANG Jiang YAN Ran XIANG Tao college of Computer science Chongqing University

The dynamic code loading mechanism of the Android system allows an application to load executable files externally at runtime. This mechanism makes the development of applications more convenient, but it also brings security issues. Applications that hide malicious behavior in the external file by dynamic code loading are becoming a new challenge for Android malware detection. To overcome this challenge, based on dynamic code loading mechanisms, three types of threat models,i.e. Model I, Model II, and Model III are defined. For the Model I type malware, its malicious behavior occurs in Dex Code, so the application programming interface(API)classes were used to characterize the behavior of the DexCode file. For the Model II type and Model III type malwares whose malicious behaviors occur in an external file,the permission complement is defined to characterize the behaviors of the external file. Based on permission complement and API calls, an Android malicious application detection method is proposed, of which feature sets are constructed by improving a feature selection method. Five datasets containing 15,581 samples are used to evaluate the performance of the proposed method. The experimental results show that our detection method achieves accuracy of 99.885% on general dataset, and performes the best on all evaluation metrics on all datasets in all comparison methods.

关键词： Android malicious application detection method threat models API calls Data security malicious behavior Android malware detection method Operating systems DexCode file executable files application programming interface classes Android (operating system) Ubiquitous and pervasive computing permission complement invasive software external file dynamic code loading mechanism application program interfaces feature selection method feature selection

AstragalosideⅣplays a role in reducing radiation-induced liver inflammation in mice by inhibiting thioredoxin-interacting protein/nod-like receptor protein 3 signaling pathway

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Journal of Traditional Chinese Medicine 2023年第1期43卷 87-94页

作者： DING Yanping DONG Xiaoqing MA Yifan CHEN Lili ZHOU Jie LI Xinyan SHAO Baoping college of Life science Northwest Normal UniversityLanzhou 730000China college of Life science Lanzhou UniversityLanzhou 730000China

OBJECTIVE:To investigate the efficacy of Astragaloside IV(AS-IV)on radiation-induced liver inflammation in mice.METHODS:The mice were divided into normal group,dimethyl sulfoxide solvent group,irradiation group(IR),irradiation+AS-IV(20 mg/kg)group(IR+AS-20)and irradiation+AS-IV(40 mg/kg)group(IR+AS-40).One month after intraperitoneal injection of AS-IV,the mice were irradiated with 8Gry Co60γ,the blood was collected for biochemical analysis,and the liver was collected for hematoxylin-eosin staining,immunofluorescence and electron microscopic observation,oxidative stress,and Western blot analysis.RESULTS:The AS-IV treatment significantly ameliorated the pathological morphology of liver and reduced the alanine aminotransferase and aspertate aminotransferase levels in serum induced by radiation;AS-IV treatment also significantly reduced the expression of inflammatory factors tumor necrosis factor alpha and interleukin 6 and antagonized malonaldehyde content and superoxide dismutase activity in liver caused by radiation;in addition,AS-IV treatment can significantly inhibited the positive expression of thioredoxin-interacting protein(TXNIP)and nod-like receptor protein 3(NLRP3)inflammasome in liver tissue after radiation;The expression of TXNIP,NLRP3 inflammasome,apoptosisassociated speck-like protein containing a CARD,cysteinyl aspartate-specific proteinase 1 and interleukin 1beta in the AS-IV prevention group decreased significantly compared to the radiation group.CONCLUSIONS:These findings suggested that Co60γradiation can cause structural and functional damage to the liver,which may be related to the NLRP3 mediated inflammatory pathway;AS-IV may play a protective role by inhibiting the TXNIP/NLRP3 inflammasome signaling pathway in the radiation-induced liver injury model.

关键词： radiation,ionizing astragalosideⅣ liver inflammation NLR family,pyrin domain-containing 3 protein thioredoxin-interacting protein

Lithiation-induced controllable vacancy engineering for developing highly active Ni_(3)Se_(2) as a high-rate and large-capacity battery-type cathode in hybrid supercapacitors

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Journal of Energy Chemistry 2023年第3期78卷 37-46,I0002页

作者： Yinna He Ting Liu Jiangnan Song Yiwei Wang Yuxiao Zhang Jie Feng Alan Meng Guicun Li Lei Wang Jian Zhao Zhenjiang Li college of Chemistry and Molecular Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina college of Materials science and Engineering College of Electromechanical EngineeringQingdao University of Science and TechnologyQingdao 266042ShandongChina

The poor rate capability and low capacity are huge barriers to realize the commercial applications of battery-type transition metal compounds(TMCs) cathode.Herein,numerous Se vacancy defects are introduced into the Ni_(3)Se_(2)lamellas by pre-lithiation technique,which can be acted as a novel class of battery-type cathode for hybrid supercapacitors.Appropriately modulating the contents of the preembedded lithium(Li) ions can induce a controllable vacancy content in the series of as-prepared products,effectively endowing a fast reaction kinetic and high activity for the cathode.Benefiting from the distinct design,the optimized cathode(Li2-Ni_(3)Se_(2)) presents a high specific capacity of 236 mA h g^(-1)at1 A g^(-1),importantly,it can still possess 117 mA h g^(-1)when the current density is increased up to 100A g^(-1),exhibiting relatively high rate capability.It is much superior to other battery-type TMC cathodes reported in previous studies.Moreover,the cathode also shows the excellent cycling stability with 92%capacity retention after 3,000 cycles.In addition,a hybrid supercapacitor(HSC) is assembled with the obtained Li2-Ni_(3)Se_(2)as the cathode and active carbon(AC) as the anode,which delivers a high energy density of 77 W h kg^(-1)at 4 kW kg^(-1)and long-term durability(90% capacitance retention after 10,000 cycles).Therefore,the strategy not only provides an effective way to realize the controllable vacancy content in TMCs for achieving high-perfo rmance cathodes for HSC,but also further promotes their large-scale applications in the energy storage fields.

关键词： Pre-lithiation Selenium vacancies High-rate Battery-type cathode Hybrid supercapacitor