PCA-BP Based Analysis of the Evaluation of Computerized Accounting Information

Xiaohong Peng 보안공학연구지원센터 2016 International Journal of Hybrid Information Techno Vol.9 No.8

It is unclear to what extent accounting information can reduce capital risks related to the expected return on a firm’s stock, this is a nonlinear problem; meanwhile, PCA-BP method is suitable for nonlinear problem. This study evaluates accounting information' effect on listed companies' capital cost at Stock Exchange based on PCA-BP method. Results show that implementation of accounting information at listed companies can evaluate the cost of capital by the internal controls, the quality of the financial reports and the process of the company’s transactions. Our finding provides a direct link between the evaluation of a firm's accounting information and its cost of capital.

Stratigraphic classification of the Quaternary North Hebei Plain using geophysical methods

Peng Dai,Kongyou Wu,Shengdong Wang,Sicong Zheng,Tianshe Cheng,Xiaohong Deng 한국지질과학협의회 2024 Geosciences Journal Vol.28 No.2

The North Hebei Plain is a typical example of a deep-covered area, with a thickness of more than 200 m Quaternary loose sediments. Previous studies have tried various stratigraphic classification methods but lack an effective combination of geophysical methods. Based on the analysis of rock strata and dating tests, combined with geophysical well-logging data, shallow seismic reflection, and paleomagnetic dating, the Quaternary strata of the deep-covered area in the Hebei Plain was divided into the Lower Pleistocene series, the Middle Pleistocene series, the Upper Pleistocene series, and the Holocene series. By observing the cores of the Quaternary borehole QHJ02, this paper focused on dividing its loose sediments into eight lithological sections, according to the lithology, sediment colour, sedimentary assemblage, and sedimentary environment. The geomagnetic polarity belt is divided according to the paleomagnetic inclination of the paleomagnetic sample in borehole QHJ02. The results of the paleomagnetic test show that the interval of 0–101.3 m is Brunhes normal polarity chron, the interval from 101.3 to 219.5 m is Matuyama reversed polarity chron, and the interval from 219.5 to 350 m is Gauss normal polarity chron. The amplitude of the geophysical logging curve shows a good correspondence with the lithology of the QHJ02 borehole. The lithology changes can be identified through the abrupt abnormal positions of logging curves such as gamma ray, resistivity, and magnetization to analyze the sedimentary environment combination and determine the formation boundary. According to the combination of paleomagnetic, shallow seismic reflection, and geophysical well logging methods, we can determine the bottom boundaries of the Quaternary and middle Pleistocene are 219.5 m and 101.3 m, respectively. According to the combination of geophysical well-logging, lithostratigraphic assessment, dating experiment of Accelerator Mass Spectrometry 14C (AMS 14C), and Optically Stimulated Luminescence (OSL), we can determine the bottom of the upper Pleistocene and the lower limit of Holocene to be at 45.4 m and 21.4 m, respectively. Based on a comprehensive analysis of rock stratigraphic characteristics and well-logging curves, this study investigated the paleoenvironmental characteristics of borehole QHJ02 at different ages. The Upper Neogene was characterized by branch channels and river floodplains, with localized occurrences of alluvial fans, avulsion fans, and inter-channel lowlands. During the Early Pleistocene, branch channels and inter-channel lowlands dominated, with localized river floodplains. The Middle Pleistocene witnessed alternating branch channels and river floodplains as the main paleoenvironments. In the Late Pleistocene, branch channels and inter-channel lowlands were prevalent. The Holocene saw a combination of natural levees and river floodplain environments. These findings enhance our understanding of the geological evolution and paleoenvironmental changes in the North Hebei Plain.

Preparation and Catalytic Application of Rh3+/Ru3+ Bimetallic Catalyst Stabilized by Triolefinic Macrocycle-Terminated Poly(propylene imine) Dendrimer

Wei Zhou,Xiaohong Peng 한국고분자학회 2016 Macromolecular Research Vol.24 No.11

The novel homogeneous bimetallic Rh3+/Ru3+ catalyst (G2-M(Rh3+ xRu3+ 10-x)) was prepared within a second- generation poly(propylene imine) dendrimer terminated by nitrogen-containing triolefinic macrocycle (G2-M) by a co-complexation route. The G2-M(Rh3+ x Ru3+ 10-x) catalyst was analyzed by 1H NMR (nuclear magnetic resonance), XPS (X-ray photoelectron spectroscopy), and XRD (X-ray diffraction). As a novel catalyst system, The bimetallic ions of Rh3+ and Ru3+ influenced on the catalytic activity for the hydrogenation of nitrile-butadiene rubber (NBR), which can be related to electron-deficiency effect resulting from the electron density shift from the Rh3+ to the Ru3+. The G2-M (Rh3+ 10) and G2-M(Rh3+ 7Ru3+ 3) displayed more excellent activity and favorable separation capability for the hydrogenation of NBR than the Rh nanoparticle catalyst stabilized by G2-M (G2-M(Rh10)).

Enhanced Separation Capability of Rhodium Ionic Catalyst Encapsulated by Propionation-Terminated Poly(propylene imine) Dendrimer

Wei Zhou,Xiaohong Peng 한국고분자학회 2019 Macromolecular Research Vol.27 No.3

The second generation of poly(propylene imine) dendrimer peripherally terminated by propionation (G2-P) was synthesized. The structure and composition of G2-P were characterized by Fourier transform infrared (FTIR) spectrometer, 1H nuclear magnetic resonance spectroscopy (NMR), 13C NMR, matrix assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOF MS) and elemental analysis. The encapsulated catalyst (G2-P(Rh3+)) was prepared by the coordination between G2-P and RhCl3·3H2O, and applied to the hydrogenation of nitrile-butadiene rubber (NBR) and styrene-butadiene rubber (SBR). G2-P(Rh3+) displayed excellent catalytic activity and selectivity for NBR and SBR hydrogenation, and Rh residue contents for hydrogenated NBR (HNBR) and hydrogenated SBR were only 80 ppm and 35 ppm respectively without any post treatment, which decreased 69.8% and 80.9% respectively compared with those of RhCl(PPh3)3.

CD31 and D2-40 Contribute to Peritoneal Metastasis of Colorectal Cancer by Promoting Epithelial-Mesenchymal Transition

( Xinqiang Zhu ),( Gang Zhou ),( Peng Ni ),( Xuetong Jiang ),( Hailong Huang ),( Jianqiang Wu ),( Xiaohong Shi ),( Xiaoling Jiang ),( Jianing Liu ) 대한소화기학회 2021 Gut and Liver Vol.15 No.2

Background/Aims: Colorectal cancer (CRC) patients often exhibit peritoneal metastasis, which negatively impacts their prognosis. CD31 and D2-40 have recently been suggested to be predictors of breast cancer prognosis, but their role in colorectal peritoneal metastasis (CRPM) remains unknown. Methods: The expression profiles of CD31 and D2-40 were analyzed in CRC patients with or without CRPM and in CRC cell lines with increasing metastatic potential. Overexpression and short hairpin RNA knockdown assays were performed in CRC cells, and the effects of these alterations on epithelial-mesenchymal transition (EMT) in vitro, growth of xenograft tumors in vivo, and peritoneal metastasis potential in a mouse model of CRPM were examined. Results: The expressions of CD31 and D2-40 were upregulated in CRC tumor tissues and was elevated further in tumor tissues from patients with CRPM. CD31 and D2-40 expression levels exhibited increasing trends parallel to the EMT potential of CRC cells. CD31 and D2-40 are essential for CRC cell EMT in vitro as well as for xenograft tumor growth and peritoneal metastasis in vivo. Conclusions: CD31 and D2-40 contribute to CRPM by promoting EMT and may serve as prognostic markers and therapeutic targets for CRC, particularly in patients with peritoneal metastasis. (Gut Liver 2021;15:273-283)

Salt template-assisted construction of three-dimensional interconnected network in thermally conductive EP/PVDF/NiCo@GNP composites

Ning Jia,Bin Yang,Xiaohong Wang,Shishuang Cui,Peng Chen,Ru Xia,Zhengzhi Zheng,Jiasheng Qian,Yuchao Ke,Yang Pan 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.125 No.-

In this study, graphene nanoplatelets (GNP) and nickel–cobalt (NiCo) alloy were adopted as reinforcingmaterials to prepare epoxy (EP) resin-based composites. NiCo particles were able to achieve uniformanchoring on GNPs’ surface under the electrostatic force due to the successful introduction of oxygendefects on GNPs. With the synergistic effect of adhesive PVDF and salt particles, the system with threedimensionally(3D) interconnected network was successfully constructed. Benefit from the formation ofmechanically stable and efficient heat conduction paths, the thermal conductivity (TC) of the EP/PVDF/NiCo@GNP composite reached 1.077 Wm1K1 at a filler volume fraction of 6.82 vol%, while the counterpart’sstoragemodulus (E’) was up to 3.22 GPa. In addition, a scaling formula was quantitatively proposed tocorrelate TC with E’, and the perfect agreement between the theoretical prediction and experimental dataclarified the underlying mechanism of the relationship between phonons transport and stress transferwithin a systemwith 3D ordered structures. The establishment of relationship between AHR (average heatingrate) and TC made it possible to further predict TC of composites based upon the infrared thermal imaging(ITI) data. The as-prepared GNP composites show good application prospects as thermal managementmaterials which need to experience thermally mechanical deformation.

Corrosion trend on Q450 weathering steel deposited with Na2SO4, NaCl under ultraviolet light illumination

Liying Song,Hao Shi,Peng Han,Xiaohong Ji,Fubin Ma 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.102 No.-

A contrastive study about ultraviolet light (UV) illumination on Na2SO4, NaCl induced Q450 weatheringsteel was qualitatively and quantitatively studied. The corrosion rate was calculated from mass losses andthe order was as following, coupons deposited with Na2SO4 under UV illumination(238.18 lA cm 2) > with NaCl under UV illumination (213.77 lA cm 2) > with NaCl under Dark condition(71.98 lA cm 2) > with Na2SO4 under Dark condition (43.26 lA cm 2). The influence of UV illuminationon metal corrosion followed this sequence: Na2SO4 > NaCl, and which was on account of corrosion productsfilm on metal depositing Na2SO4 with a larger carrier density on metal depositing Na2SO4 with a largercarrier density (9.32 1020 cm 3) and stronger electric conductivity ability than NaCl (8.93 1020cm 3). Electrochemical impedance spectroscopy studies revealed charge transfer resistance Rct value,suggesting that smaller resistances gained on the rusted samples due to UV illumination, and an acceleratedcorrosion effect on rusted sample was also obtained under UV illumination. The improved corrosionperformance by UV illumination was due to corrosion products of semiconductor property andphotovoltaic effect.

Carvacrol improves blood lipid and glucose in rats with type 2 diabetes mellitus by regulating short-chain fatty acids and the GPR41/43 pathway

Sun Yan,Qu Hai,Niu Xiaohong,Li Ting,Wang Lijuan,Peng Hairui 대한약리학회 2024 The Korean Journal of Physiology & Pharmacology Vol.28 No.1

Type 2 diabetes mellitus (T2DM) is characterized by hyperglycemia and dyslipidemia. Carvacrol (CAR) has demonstrated the potential to mitigate dyslipidemia. This study aims to investigate whether CAR can modulate blood glucose and lipid levels in a T2DM rat model by regulating short-chain fatty acids (SCFAs) and the GPR41/43 pathway. The T2DM rat model was induced by a high-fat diet combined with low-dose streptozocin injection and treated with oral CAR and/or mixed antibiotics. Fasting blood glucose, oral glucose tolerance, and insulin tolerance tests were assessed. Serum lipid parameters, hepatic and renal function indicators, tissue morphology, and SCFAs were measured. In vitro, high glucose (HG)-induced IEC-6 cells were treated with CAR, and optimal CAR concentration was determined. HG-induced IEC-6 cells were treated with SCFAs or/and GPR41/43 agonists. CAR significantly reduced blood lipid and glucose levels, improved tissue damage, and increased SCFA levels in feces and GPR41/43 expression in colonic tissues of T2DM rats. CAR also at tenuated HG-induced apoptosis of IEC-6 cells and enhanced GPR41/43 expression. Overall, these findings suggest that CAR alleviates blood lipid and glucose abnormalities in T2DM rats by modulating SCFAs and the GPR41/43 pathway.