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Neighbor Sum Distinguishing Total Colorings of Triangle Free Planar Graphs

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Acta Mathematica Sinica,English Series 2015年第2期31卷 216-224页

作者： ji hui wang Qiao Ling MA Xue HAN School of Mathematical Sciences University of Ji'nan

A total k-coloring c of a graph G is a proper total coloring c of G using colors of the set [k] = {1, 2,...,k}. Let f（u） denote the sum of the color on a vertex u and colors on all the edges incident to u. A k-neighbor sum distinguishing total coloring of G is a total k-coloring of G such that for each edge uv ∈ E（G）, f（u） ≠ f（v）. By X＂nsd（G）, we denote the smallest value k in such a coloring of G. Pilgniak and Wozniak conjectured that X＂nsd（G） ≤ △（G）＋ 3 for any simple graph with maximum degree △（G）. In this paper, by using the famous Combinatorial Nullstellensatz, we prove that the conjecture holds for any triangle free planar graph with maximum degree at least 7.

关键词： Neighbor sum distinguishing total coloring combinatorial Nullstellensatz triangle freeplanar graph

Neighbor Sum Distinguishing Index of Sparse Graphs

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Acta Mathematica Sinica,English Series 2020年第6期36卷 673-690页

作者： ji hui wang Bao jian QIU jian Sheng CAI School of Mathematical Sciences University of JinanJinan 250022P.R.China School of Mathematics and Information Sciences Weifang UniversityWeifang 261061P.R.China

A proper k-edge coloring of a graph G is an assignment of one of k colors to each edge of G such that there are no two edges with the same color incident to a common *** f(v)denote the sum of colors of the edges incident to v.A k-neighbor sum distinguishing edge coloring of G is a proper k-edge coloring of G such that for each edge uv∈E(G),f(u)≠f(v).Byχ’_∑(G),we denote the smallest value k in such a coloring of *** mad(G)denote the maximum average degree of a graph *** this paper,we prove that every normal graph with mad(G)<10/3 andΔ(G)≥8 admits a(Δ(G)+2)-neighbor sum distinguishing edge *** approach is based on the Combinatorial Nullstellensatz and discharging method.

关键词： Proper edge coloring neighbor sum distinguishing edge coloring maximum average degree Combinatorial Nullstellensatz

Detection of H_2O_2 at a composite film modified electrode with highly dispersed Ag nanoparticles in Nafion

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Chinese Chemical Letters 2011年第4期22卷 458-460页

作者： Mei Xiu Kan Xue ji wang hui Min Zhang School of Science Beijing Institute of TechnologyBeijing 100081China

Ag nanoparticles were prepared by using the ion-exchange of Nafion combined with electrochemical reduction on the electrode. Ag nanoparticles are highly dispersed in Nafion film with an average size of 4.0±0.2 *** amount of Ag nanoparticles can be readily controlled by the amount of Nafion coated on the *** obtained Ag nanoparticles exhibit good catalytic activity for the reduction of H2O2 with a linear response to H2O2 in the concentration range of 0.04-8.0 mmol/L with a sensitivity of 0.34μA/mmol/L and a detection limit of 1.0×10^（-8） mol/L.

关键词： Ag nanoparticles Nafion Electrodeposition Electrocatalytic activity Hydrogen peroxide

Gut microbiota in obesity

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World Journal of Gastroenterology 2021年第25期27卷 3837-3850页

作者： Bing-Nan Liu Xiao-Tong Liu Zi-Han Liang ji-hui wang School of Bioengineering Dalian Polytechnic UniversityDalian 116034Liaoning ProvinceChina Engineering Research Center of Health Food Design&Nutrition Regulation Dongguan University of TechnologyDongguan 523808Guangdong ProvinceChina

Obesity is a major global health problem determined by heredity and environment,and its incidence is increasing *** recent years,increasing evidence linking obesity to the gut microbiota has been *** microbiota management has become a new method of obesity ***,the complex interactions among genetics,environment,the gut microbiota,and obesity remain poorly *** this review,we summarize the characteristics of the gut microbiota in obesity,the mechanism of obesity induced by the gut microbiota,and the influence of genetic and environmental factors on the gut microbiota and obesity to provide support for understanding the complex relationship between obesity and *** the same time,the prospect of obesity research related to the gut microbiota is proposed.

关键词： Gut microbiota Obesity Dysbiosis Genetics Ecology

Effect of Deep Sea Pressures on the Corrosion Behavior of X65 Steel in the Artificial Seawater

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Acta Metallurgica Sinica(English Letters) 2019年第8期32卷 972-980页

作者： Qiu-Shi Li Shun-Zhong Luo Xu-Teng Xing jing Yuan Xin Liu ji-hui wang Wen-Bin Hu Tianjin Key Laboratory of Composite and Functional Materials School of Materials Science and EngineeringTianjin UniversityTianjin 300072China College of Physics Electronic Information Engineering Qinghai University for NationalitiesXining 810007China

The corrosion behaviors of X65 steel in the artificial seawater at different hydrostatic pressures are investigated by potentiodynamic polarization measurements, electrochemical impedance spectroscopy measurements and weight loss *** corroded morphologies and the corrosion products are also investigated by scanning electron microscopy, X-ray diffraction analysis and Raman *** results show that the corrosion current increases as the hydrostatic pressure *** charge transfer resistance decreases as the hydrostatic pressure *** corrosion products are mainly composed of γ-FeOOH and Fe3O4 at the atmospheric pressure, while the main components are γ-FeOOH, Fe3O4, and γ-Fe2O3 at the high *** hydrostatic pressure accelerates the corrosion of X65 steel due to its effect on the chemical and physical properties of corrosion products, including the promoted reduction of γ-FeOOH and the wider and deeper cracks on the corrosion products layer.

关键词： X65 steel Deep sea pressures Electrochemical measurements Corrosion

Expression of Yes-associated protein 1 gene and protein in oral squamous cell carcinoma

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Chinese Medical Journal 2013年第4期126卷 655-658页

作者： LI Song-ying HU ji-an wang hui-ming Department of Oral Pathology Department of Oral and Maxillofacial Surgery Hospital of Stomatology Zhejiang University School of Medicine Hangzhou Zhejiang 310016 China

Background Oral squamous cell carcinoma （OSCC） is one of the most common malignancies in the oral and maxillofacial region. Yes-associated protein 1 （YAP1） has been implicated as a bona fide oncogene in solid tumors. We seek to elucidate the role of YAP1 in OSCC tissue. Methods We identified YAP1 gene and protein overexpression in 30 OSCC patients and 10 normal oral mucosa tissues by immunohistochemistry, Western blotting and reverse transcription polymerase chain reaction （RT-PCR）. Results In the normal oral mucosa by immunohistochemical staining, YAP1 mainly located in both the cytoplasm and nucleus mainly the nuclei of the basal cells. In OSCC, the expression of YAP1 translocated from the nucleus to cytoplasm YAP1 being mainly located in both the cytoplasm and nucleus of the adjacent mucosa. The expression of YAP1 gradual increased in normal oral mucosa, tumor adjacent mucosa and low grade, middle grade, high grade OSCC tissue by Western blotting. Significant difference was found between the expressions of the normal oral mucosa and OSCC tissue （P 〈0.05）. The coincidence was detected between the normal oral mucosa and OSCC tissue by RT-PCR （P 〈0.05）. Conclusions YAP1 is involved in the carcinogenesis and development of OSCC. There is a transformation between nucleus and cytoplasm.

关键词： oral squamous cell carcinoma Yes-associated protein 1 oncogene

Characterization of pitting corrosion of 7A60 aluminum alloy by EN and EIS techniques

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Transactions of Nonferrous Metals Society of China 2014年第12期24卷 3907-3916页

作者：王学慧王吉会付丛伟天津大学水利工程仿真与安全国家重点实验室天津300072 天津大学材料科学与工程学院天津复合与功能材料重点实验室天津300072

The pitting corrosion behaviors of 7A60 aluminum alloy in the retrogression and re-aging （RRA） temper were investigated by electrochemical impedance spectroscopy （EIS） and electrochemical noise （EN） techniques, and the microstructure and the second phase content of the alloy were observed and determined by scanning electron microscopy （SEM） and energy dispersive spectrometer （EDS）. The results show that there exist two different corrosion stages for 7A60 alloy in 3.5%NaCl solution, and the corrosion process can be detected by the appearance of EIS spectrum with two capacitive time constants and the wavelet fractal dimension D extracted from EN. SEM and EDS results also demonstrate that severe pitting corrosion in 7A60 alloy is mainly caused by electrochemical active MgZn2 particles, secondly by Al2MgCu and Mg2Si. Al7Cu2Fe particles make little contribution to the pitting corrosion of 7A60 alloy.

关键词： 7A60 aluminum alloy constituent particles pitting corrosion electrochemical impedance spectroscopy electrochemical noise wavelet fractal dimension

Elastic Characteristic Extraction Method of Underwater Target Based on Adaptive Filtering

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Journal of Electronic Science and Technology 2012年第2期10卷 149-152页

作者： Zhen-Shan wang Yun-Fei Chen Gui-Juan Li ji-hui wang Key Laboratory for Underwater Test & Control Technology Dalian 116013 China Department of Ship Engineering Dalian University of Technology and also with Key Laboratory for Underwater Test & Control Technology Dalian 116013 China

In this paper, a kind of elastic characteristic extraction method of underwater targets based on adaptive filtering is introduced. The kernel of the method is the recursive least square （RLS） algorithm. Firstly, the geometric scattering signal is fit by using the echo signal and the incident signal. Then, the frequency spectrum of the echo signal and the geometric scattering signal are calculated. At last, the frequency spectrum of the elastic scattering signal is obtained. The research of the simulation and lake experiment is carried on. As the results show, the formants of the elastic signal frequency spectrum can be precisely extracted by the algorithm, and the extraction algorithm can apply to extracting the elastic characteristic from the echo signal in a real underwater acoustics environment.

关键词： Adaptive characteristic elastic scattering scattering signal. filtering signal elastic geometric

RF Optimizer Model for Predicting Compressive Strength of Recycled Concrete

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 215-223页

作者： LIU Lin wang Liuyan wang hui SUN Huayue School of Civil Engineering and Architecture Shenyang UniversityShenyang 110000China

Traditional machine learning(ML)encounters the challenge of parameter adjustment when predicting the compressive strength of reclaimed *** address this issue,we introduce two optimized hybrid models:the Bayesian optimization model(B-RF)and the optimal model(Stacking model).These models are applied to a data set comprising 438 observations with five input variables,with the aim of predicting the compressive strength of reclaimed ***,we evaluate the performance of the optimized models in comparison to traditional machine learning models,such as support vector regression(SVR),decision tree(DT),and random forest(RF).The results reveal that the Stacking model exhibits superior predictive performance,with evaluation indices including R2=0.825,MAE=2.818 and MSE=14.265,surpassing the traditional ***,we also performed a characteristic importance analysis on the input variables,and we concluded that cement had the greatest influence on the compressive strength of reclaimed concrete,followed by ***,the Stacking model can be recommended as a compressive strength prediction tool to partially replace laboratory compressive strength testing,resulting in time and cost savings.

关键词： machine learning recycled concrete compressive strength