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IKPCA-ELM-based Intrusion Detection Method
( Hui Wang ),( Chengjie Wang ),( Zihao Shen ),( Dengwei Lin ) 한국인터넷정보학회 2020 KSII Transactions on Internet and Information Syst Vol.14 No.7
An IKPCA-ELM-based intrusion detection method is developed to address the problem of the low accuracy and slow speed of intrusion detection caused by redundancies and high dimensions of data in the network. First, in order to reduce the effects of uneven sample distribution and sample attribute differences on the extraction of KPCA features, the sample attribute mean and mean square error are introduced into the Gaussian radial basis function and polynomial kernel function respectively, and the two improved kernel functions are combined to construct a hybrid kernel function. Second, an improved particle swarm optimization (IPSO) algorithm is proposed to determine the optimal hybrid kernel function for improved kernel principal component analysis (IKPCA). Finally, IKPCA is conducted to complete feature extraction, and an extreme learning machine (ELM) is applied to classify common attack type detection. The experimental results demonstrate the effectiveness of the constructed hybrid kernel function. Compared with other intrusion detection methods, IKPCA-ELM not only ensures high accuracy rates, but also reduces the detection time and false alarm rate, especially reducing the false alarm rate of small sample attacks.
Lithium Superoxide Hydrolysis and Relevance to Li–O<sub>2</sub> Batteries
Wang, Hsien-Hau,Lee, Yun Jung,Assary, Rajeev S.,Zhang, Chengji,Luo, Xiangyi,Redfern, Paul C.,Lu, Jun,Lee, Young Joo,Kim, Do Hyung,Kang, Tae-Geun,Indacochea, Ernesto,Lau, Kah Chun,Amine, Khalil,Curtiss American Chemical Society 2017 The Journal of Physical Chemistry Part C Vol.121 No.18
<P>Fundamental understanding;of reactions, of lithium peroxides and superoxides is this for :the development of Li-O-2 batteries. In context, an investigation is reported of the hydrolysis of lithium superoxide, which has recently been synthesized in a Li-O-2 battery. Surprisingly, the hydrolysis of solid LiO2 is significantly different from that of NaO2 and KO2. Unlike KO2 and NaO2, the hydrolysis of LiO2 does not produce H2O2. Similarly, the reactivity of Li2O2 toward water differs from LiO2 in that Li2O2 results in H2O2 as a product. The difference in the LiO2 reactivity with water due to the more exothermic nature of the formation of LiOH and O-2 compared with the corresponding reactions, of NaO2 and KO2. We also show that a titration method used in this study, based on reaction of the discharge product with a Ti(IV)OSO4 solution; provides a useful diagnostic technique to provide information Oh the composition of a,discharge product in a Li-O-2 battery.</P>
Kun Wang,Chengjie Ma,Guangyu Gong,Chao Chang 한국식품과학회 2019 Food Science and Biotechnology Vol.28 No.4
This study evaluated the influence of tomatojuice enriched with the probiotic strain Lactobacillusplantarum ST-III on the flavor and health-promotingeffects of fermented skim milk. Fermentation parameters,such as titratable acidity, viable cell counts, antioxidantactivity, and volatile components, were examined. Theviable bacterial cell counts of 40% tomato juice sampleswere significantly higher than those in the control group,peaking at 1.09 9 109 CFU/mL after 48 h, and the titratableacidity was increased by 2.76-fold versus the controlvalue. The antioxidant ability of fermented milk was correlatedwith the tomato juice content in addition to fermentationtime in the 2,2-diphenyl-1-picrylhydrazyl andferric reducing/antioxidant power assays; for these methods,the scavenging activities of 40% samples were 1.18-and 1.28-fold higher than the control values, respectively,at 24 h. Moreover, abundant flavor components, especiallyaldehydes, were detected after the addition of L. plantarumST-III-supplemented tomato juice.
Pengfei Wang,Peng Ding,Wenhuai Li,Rongshun Xie,Chengjie Duan,Gang Hong,Yaoli Zhang 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.3
An experimental study has been conducted to investigate the heat transfer characteristics of supercriticalcarbon dioxide (sCO2) uniformly heated in the horizontal circular smooth tube. The results illustratedthat there was a significant difference in heat transfer between the top wall and bottom wall due to thebuoyancy. Bulk flow acceleration cannot be negligible in the high heat flux region, which leads to heattransfer deterioration. A new heat transfer correlation is proposed, in which the buoyancy parameter andbulk flow acceleration have been taken into account. The new correlation and six classic correlations forsCO2 are examined in horizontal tubes. The comparison indicates that the new correlation has a betterperformance for sCO2 flowing through a horizontal heating tube under natural circulation conditions. Forexample, 94.9% of the calculated results using the new heat transfer correlation were within ±30% of theexperimental results while only 87.9% of that using the Jackson correlation (the best of the six) werewithin the same error bands.
Jiang, Yuanyuan,Tang, Shiming,Wang, Chengjie,Zhou, Pei,Tenuta, Mario,Han, Guodong,Huang, Ding Asian Australasian Association of Animal Productio 2012 Animal Bioscience Vol.25 No.2
The effects of sheep urine and dung patches on methane ($CH_4$) and carbon dioxide ($CO_2$) fluxes were investigated during the summer-autumn in 2010, to evaluate their contribution to climate change in a desert grassland in Inner Mongolia, China. Results indicate that the cumulative $CH_4$ emissions for dung patches, urine patches and control plots were -0.076, -0.084, and -0.114 g/$m^2$ and these were net $CH_4$ sinks during the measured period. The level of $CH_4$ intake from urine and dung plots decreased 25.7%, and 33.3%, respectively, compared with a control plot. $CO_2$ fluxes differed (p<0.01) in urine plots, with an average of 569.20 mg/$m^2$/h compared with control plots (357.62 mg/$m^2$/h) across all sampling days. Dung patches have cumulative $CO_2$ emissions that were 15.9% higher compared with the control during the 55-d period. Overall, sheep excrement weakened $CH_4$ intake and increased $CO_2$ emissions.
Halder, Avik,Ngo, Anh T.,Luo, Xiangyi,Wang, Hsien-Hau,Wen, J. G.,Abbasi, Pedram,Asadi, Mohammad,Zhang, Chengji,Miller, Dean,Zhang, Dongzhou,Lu, Jun,Redfern, Paul C.,Lau, Kah Chun,Amine, Rachid,Assary, American Chemical Society [etc.] 2019 The Journal of physical chemistry A Vol. No.
<P>Lithium-oxygen (Li-O<SUB>2</SUB>) batteries are a promising class of rechargeable Li batteries with a potentially very high achievable energy density. One of the major challenges for Li-O<SUB>2</SUB> batteries is the high charge overpotential, which results in a low energy efficiency. In this work size-selected subnanometer Ir clusters are used to investigate cathode materials that can help control lithium superoxide formation during discharge, which has good electronic conductivity needed for low charge potentials. It is found that Ir particles can lead to lithium superoxide formation as the discharge product with Ir particle sizes of ∼1.5 nm giving the lowest charge potentials. During discharge these 1.5 nm Ir nanoparticles surprisingly evolve to larger ones while incorporating Li to form core-shell structures with Ir<SUB>3</SUB>Li shells, which probably act as templates for growth of lithium superoxide during discharge. Various characterization techniques including DEMS, Raman, titration, and HRTEM are used to characterize the LiO<SUB>2</SUB> discharge product and the evolution of the Ir nanoparticles. Density functional calculations are used to provide insight into the mechanism for formation of the core-shell Ir<SUB>3</SUB>Li particles. The <I>in situ</I> formed Ir<SUB>3</SUB>Li core-shell nanoparticles discovered here provide a new direction for active cathode materials that can reduce charge overpotentials in Li-O<SUB>2</SUB> batteries.</P> [FIG OMISSION]</BR>
Xie Tao,Zhang Wei,Chen Chengjie,Wang Xiaoshuang,Zhang Jing,Luan Aiping,He Yehua 한국원예학회 2023 Horticulture, Environment, and Biotechnology Vol.64 No.6
Somatic embryogenesis (SE) is a key regeneration process in plant. AcSERK1 is a gene specifi cally expressed in the early stage of SE in pineapple ( Ananas comosus ), suggesting that the promoter of SERK1 might contain specifi c cis acting element regulating SE. To identify embryonic cell-specifi c element in the SERK1 promoter, a series of binary plant transformation vectors with GUS (β-glucuronidase) reporter gene were systematically analyzed by transient gene expression system in wild-type and transgenic pineapple embryogenic callus. Histochemical and quantitative GUS assays demonstrated that the activity of the AcSERK1 upstream regulatory sequence lacking − 921 to -911 or -910 to -880 was signifi cantly reduced in the embryonic callus of the pineapple, and these two regions were needed for the embryonic cell-specifi c. Besides, a promoter lacking − 943 to -922 was shown to signifi cantly increase GUS activity in embryogenic callus, suggesting repressive elements exist in this region. Our data of stable transformation assays confi rmed again the 5’ upstream regulatory sequence (-921 to -880) of the AcSERK1 gene is an essential functional region. Our fi ndings lay the basis for better understanding of the molecular mechanisms of AcSERK1 gene in the regulation in early stage of SE.
Haichuan Xu,Housheng Su,Qiming Wang,Chengjie Xu 제어·로봇·시스템학회 2021 International Journal of Control, Automation, and Vol.19 No.9
This paper investigates semi-global adaptive bipartite output consensus of continuous-time multi-agent systems (MASs) with input saturation and non-identical external disturbance under jointly connected switching network. An adaptive bipartite output consensus protocol of MASs is proposed by using low-gain feedback technology. It is turned out that semi-global adaptive bipartite consensus of MASs can be achieved under the protocol. Furthermore, the proposed control protocol can be applied for MASs under fixed network, and semi-global adaptive bipartite output consensus can be also achieved in this case. Finally, the simulations will verify the effectiveness of theoretical results.
Shuhui Zheng,Hang Zhou,Bo Gao,Yongyong Li,Zhiheng Liao,Taifeng Zhou,Chengjie Lian,Zizhao Wu,Deying Su,Tingting Wang,Peiqiang Su,Caixia Xu 생화학분자생물학회 2018 Experimental and molecular medicine Vol.50 No.-
This study aimed to verify the effects of estrogen on the onset and development of adolescent idiopathic scoliosis and the mechanisms associated with these effects by constructing a pubescent bipedal rat model. Experiments were conducted to investigate whether scoliosis progression was prevented by a Triptorelin treatment. One hundred twenty bipedal rats were divided into female, OVX (ovariectomy), OVX + E2, Triptorelin, sham, and male groups. According to a spinal radiographic analysis, the scoliosis rates and curve severity of the female and OVX + E2 groups were higher than those in the OVX, Triptorelin, and male groups. The measurements obtained from the sagittal plane of thoracic vertebrae CT confirmed a relatively slower growth of the anterior elements and a faster growth of the posterior elements between T11 and T13 in the female and OVX + E2 groups than in the OVX and Triptorelin groups. Histomorphometry and immunohistochemistry revealed a significantly longer hypertrophic zone of the vertebral cartilage growth plates that expressed more type X collagen and less type II collagen in the OVX and Triptorelin groups than in the female and OVX + E2 groups. Ki67 immunostaining confirmed an increase in the proliferation of vertebral growth plate chondrocytes in the OVX group compared with the female and OVX + E2 groups. In conclusion, estrogen obviously increased the incidence of scoliosis and curve severity in pubescent bipedal rats. The underlying mechanism may be a loss of coupling of the endochondral ossification between the anterior and posterior columns. Triptorelin decreased the incidence of scoliosis and curve magnitudes in bipedal female rats. Introduction Adolescent