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Effect of Process Parameters on the Agglomeration Behavior and Tensile Response of Graphene Reinforced Magnesium Matrix Composites Based on Molecular Dynamics Model

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Computer Modeling in Engineering & Sciences 2024年第12期141卷 2453-2469页

作者： Chentong Zhao Jiming Zhou Xujiang Chao su wang Lehua Qi School of Mechanical Engineering Northwestern Polytechnical UniversityXi’an710072China Shanxi Key Laboratory of Fiber Reinforced Light Composite Materials Northwestern Polytechnical UniversityXi’an710072China Future Intelligent Wear Centre School of Fashion and TextilesThe Hong Kong Polytechnic UniversityHong Kong999077China

The mechanical properties of graphene reinforced composites are often hampered by challenges related to the dispersion and aggregation of graphene within the *** paper explores the mechanism of cooling rate,process temperature,and process pressure’s influence on the agglomeration behavior of graphene and the tensile response of composites from a computer simulation technology,namely molecular *** findings reveal that the cooling rate exerts minimal influence on the tensile response of ***,processing temperature significantly affects the degree of graphene aggregation,with higher temperatures leading to the formation of larger-sized graphene *** contrast,processing pressure exhibits negligible impact on the degree of graphene aggregation,and increasing pressure effectively mitigates the formation of large-sized graphene ***,we elucidate the intrinsic factors governing the mechanical response to variations in processing ***,we observe that the stretching process facilitates the decomposition of large-sized graphene clusters into smaller *** research contributes to the advancement of lightweight metal matrix composites by offering insights into optimizing processing ***,it provides crucial theoretical underpinnings for developing high-performance graphene-reinforced composites.

关键词： Agglomeration behavior GNPs/Mg composite tensile response molecular dynamics

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The Depths and the Attracting Centres for Continuous Maps on a Dendrite Whose Rank is Finite

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Acta Mathematica Sinica,English Series 2022年第9期38卷 1643-1652页

作者： Guang wang su Cai Hong HAN Tai Xiang suN Lue LI Guangxi Key Laboratory Cultivation Base of Cross-border E-commerce Intelligent Information Processing Guangxi University of Finance and EconomicsNanning 530003P.R.China College of Information and Statistics Guangxi University of Finance and EconomicsNanning 530003P.R.China

Let D be a dendrite and f be a continuous map on *** by R(f),Ω(f)andω(x,f)the set of recurrent points,the set of non-wandering points and the set ofω-limit points of x under f,***Ω_(k+1)(f)=Ω(f|_(()Ω_(k)(f)))andω^(k+1)(f)=∪_(()x∈ω~k(f))ω(x,f)for any positive integer k,whereΩ_(1)(f)=Ω(f)andω(f)=∪_(x∈D)ω(x,f).ω~m(f)is called the attracting centre of f ifω^(m+1)(f)=ω~m(f).In this paper,we show that if the rank of D is n-1,then we have the following results:(1)ω^(n+2)(f)=ω^(n+1)(f)and the attracting centre of f isω^(n+1)(f);(2)Ω_(n+2)(f)=■and the depth of f is at most n+***,if the set of(n-1)-order accumulation points of Br(D)(the set of branch points of D)is a singleton,thenΩ_(n+1)(f)=■and the depth of f is at most n+***,we show that there exist a dendrite D_(1)whose rank is n-1 and the set of(n-1)-order accumulation points of Br(D_(1))is a singleton,and a continuous map g on D_(1)such thatω^(n+1)(g)≠ω~n(g)andΩn(f)≠■.

关键词： Dendrite attracting centre depth

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A continuous and long-term in-situ stress measuring method based on fiber optic. Part I: Theory of inverse differential strain analysis

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Petroleum Science 2024年第2期21卷 1171-1189页

作者： Kun-Peng Zhang Mian Chen Chang-Jun Zhao su wang Yong-Dong Fan State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing102249China MOE Key Laboratory of Petroleum Engineering in China University of Petroleum Beijing102249China Beijing International Center for Gas Hydrate School of Earth and Space SciencesPeking UniversityBeijing100871China

A method for in-situ stress measurement via fiber optics was proposed. The method utilizes the relationship between rock mass elastic parameters and in-situ stress. The approach offers the advantage of long-term stress measurements with high spatial resolution and frequency, significantly enhancing the ability to measure in-situ stress. The sensing casing, spirally wrapped with fiber optic, is cemented into the formation to establish a formation sensing nerve. Injecting fluid into the casing generates strain disturbance, establishing the relationship between rock mass properties and treatment ***, an optimization algorithm is established to invert the elastic parameters of formation via fiber optic strains. In the first part of this paper series, we established the theoretical basis for the inverse differential strain analysis method for in-situ stress measurement, which was subsequently verified using an analytical model. This paper is the fundamental basis for the inverse differential strain analysis method.

关键词： In-situ stress Fiber optic Orthotropic elastic Differential evolution ABAQUS

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Synthesis, Crystal Structure and Insecticidal Activities of Novel Neonicotinoid Derivatives

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Chemical Research in Chinese Universities 2010年第3期26卷 380-383页

作者： ZHAO Yu wang Gang LI Yong-qiang wang su-hua LI Zheng-ming State Key Laboratory of Elemento-Organic Chemistry Research Institute of Elemento-Organic Chemistry National Pesticide Engineering Research Center（Tianjin） Nankai University Tianjin 300071 P. R. China

Ten new N-oxalyl derivatives of neonicotinoid compound were designed and synthesized. Their structures were confirmed by ^1H NMR spectra, elemental analysis and X-ray diffraction. The preliminary insecticidal activities of the new compounds were evaluated. The results of bioassays indicate that the title Compounds exhibit moderate insecticidal activities. surprisingly, the insecticidal activity of compound 7b against bean aphids at 200 mg/kg is 100%, which is comoarable to that of the commercialized imidacloprid.

关键词： Neonicotinoid N-Oxalyl derivative Insecticidal activity Bean aphid Imidacloprid

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Synthesis and Herbicidal Activity of Novel sulfonylurea Derivatives

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Chemical Research in Chinese Universities 2011年第1期27卷 60-65页

作者： CAO Gang wang Mei-yi wang Ming-zhong wang su-hua LI Yong-hong LI Zheng-ming State Key Laboratory of Elemento-Organic Chemistry Research institute of Elemento-Organic Chemistry Nankai University Tianjin 300071 P. R. China College of Chemistry and Chemical Engineering North University for Ethnics Yinchuan 750021 P. R. China

sulfonylurea herbicides have been applied worldwide in agriculture. Some sulfonylurea residues might exist in soil longer than that people expected. However, flupyrsulfuron-methyl-sodium which was firstly reported as a new 5-substituted sulfonylurea herbicide has less than one month residual life. Therefore, 5-substituted benzenesulfonylureas are potential molecules to regulate its residual situation. In order to develop new sulfonylurea derivatives, the substituent on the critical 5-posotion of the benzene ring was optimized. On the basis of our former work on sulfonylureas which contains a characteristic mono-substituted pyrimidine moiety, twenty-six new sulfonylurea deriva- tives were synthesized and their structures were confirmed by 1H NMR, 31p NMR and elemental analysis. The greenhouse bioassay tests show that some title compounds exhibit potent herbicidal activity.

关键词： sulfonylurea 5-substituted phenyl ring Herbicidal activity

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Nutritive Equilibrium in Rice Plant Populations for High Yield

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Pedosphere 1999年第1期9卷 77-82页

作者： wang BOLUN LIU XINAN YU GUIRUI su ZHENGSHU and wang su (Shenyang Agricultural University, Shenyang 110161, China) ShenyangAgriculturalUniversity Shenyang110161China ShenyangAgriculturalUniversity Shenyang110161Chi

The effects of nitrogen, phosphorus and potassium application level, seed rate and transplanting density on the growth and development of rice plants were studied to find out nutrient status in high-yielding rice plants and to increase grain yield by adequate fertilization. There was an equilibrium relationship among nutrient elements for high-yielding rice plant populations. The equilibrium index of nutrient amount, content and distribution in high-yielding rice plants should be generally greater than-2 but less than 2. The optimum nutritive proportion of nitrogen: phosphorus: potassium assimilated by the plants was about 10: 2: 9 at the ripening stage. But the content and the proportion varied with the growth stages. Therefore, the nutrient in rice plant populations should be in a dynamic equilibrium, so as to achieve high yield.

关键词： high yield nutritive equilibrium rice plant populations

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Solvent-free Synthesis of Flavanone over New Hybrid Mesoporous Base Catalysts

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Chemical Research in Chinese Universities 2011年第4期27卷 664-668页

作者： wang Hui NIU Xiao-di ZHAO Min XIAO Xue-bin wang Hong-su wang Zhong-dong Teaching Center of Basic Courses Jilin University Changchun 130062 P. R. China Department of Chemistry Mudanjiang Teachers College Mudanjiang 157012 P. R. China

Benzyl and anthracenemethyl groups were respectively bonded to the N atoms of 3-aminopropyl functionalized mesoporous SBA-15（APS-SBA-15） to obtain two new base catalysts over which the condensation reaction of benzaldehyde and 2＇-hydroxyacetophenone was *** catalytic activities and high selectivities for flavanones were obtained in solvent-free reactions,which is attributed to the effect of benzyl and anthracenemetyl groups on the base sites of catalysts and the steric hindrance of futher reaction of flavanone with benzaldehyde.

关键词： APS-SBA-15 Flavanone Bz-APS-SBA-15 An-APS-SBA-15

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sudden cardiac arrest in a patient with epilepsy induced by chronic inflammation on the cerebral surface

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Neural Regeneration Research 2012年第6期7卷 470-474页

作者： Yuxi Liu Weicheng Hao Xiaoming Yang Yimin wang Yu su Institutes of Epilepsy Shanxi Medical University Taiyuan 030001 Shanxi Province China

The present study analyzed a patient with epilepsy due to chronic inflammation on the cerebral surface underwent sudden cardiac arrest. Paradoxical brain discharge, which occurred prior to epileptic seizures, induced a sudden cardiac arrest. However, when the focal brain pressure was relieved, cardiac arrest disappeared. A 27-year-old male patient underwent pre-surgical ram monitoring for 160 hours. During monitoring, secondary tonic-clonic seizures occurred five times. A burst of paradoxical brain discharges occurred at 2-19 seconds （mean 8 seconds） prior to epileptic seizures. After 2-3 seconds, sudden cardiac arrest occurred and lasted for 12-22 seconds （average 16 seconds）. The heart rate subsequently returned to a normal rate. Results revealed arachnoid pachymenia and adhesions, as well as mucus on the focal cerebral surface, combined with poor circulation and increased pressure, lntracranial electrodes were placed using surgical methods. Following removal of the arachnoid adhesions and mucus on the local cerebral surface, paradoxical brain discharge and epileptic seizures occurred three times, but sudden cardiac arrest was not recorded during 150-hour monitoring. Post-surgical histological examination indicated meningitis. Experimental findings suggested that paradoxical brain discharge led to cardiac arrest instead of epileptic seizures; the insult was associated with chronic inflammation on the cerebral surface, which subsequently led to hypertension and poor blood circulation in focal cerebral areas.

关键词： chronic inflammation epilepsy sudden cardiac arrest sudden death video-electroencephalogram

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Therapeutic potential of the citrus flavonoid hesperidin and its aglycone hesperetin against chemotherapy-induced toxicity

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Traditional Medicine Research 2025年第4期10卷 31-48页

作者： Yu-su wang Wei-Jian Chen Zi-Yao Mo Yun-Jing He Ke Nie School of Chinese Materia Medica Guangdong Pharmaceutical UniversityGuangzhou 510006China

Chemotherapy-induced toxicity(CIT)remains a major concern in cancer patients undergoing *** approaches to ameliorate the side effects of chemotherapy are urgently ***,the nutritional value of citrus fruits has attracted wide *** and its aglycone hesperetin are the main active components in citrus *** and hesperetin have a wide range of pharmacological activities,including antioxidant and anti-inflammatory *** review aims to provide insights into the potential application of citrus flavonoids in CIT and summarize the underlying mechanisms of hesperidin and hesperetin in alleviating *** have collected and collated relevant scientific articles on hesperidin and hesperetin and their treatment of CIT from different scientific *** and its glycosides can reduce the toxicity of chemotherapeutic drugs,and their therapeutic effects are mainly through anti-inflammatory and antioxidant *** present,modern medical treatment is the main treatment method for CIT,but hesperidin,as an extract of food and medicinal materials,can greatly alleviate *** killing tumor cells,chemotherapeutic drugs also damage normal cells leading to toxic effect on various *** pathological mechanism of CIT has not been fully elucidated,but current evidences indicate that cellular stress plays a key *** citrus flavonoids hesperidin and hesperetin have the protective effect against CIT,highlighting its potential as an adjuvant in chemotherapy *** may also have synergistic anti-tumor activity with chemotherapeutic *** believe that more functional foods and anti-CIT drugs based on natural foods will be developed.

关键词： chemotherapy-induced toxicity citrus flavonoids hesperidin hesperetin

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Stability of Periodic Orbits and Return Trajectories of Continuous Multi-valued Maps on Intervals

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Acta Mathematica Sinica,English Series 2018年第7期34卷 1121-1130页

作者： Tai Xiang suN Fan Ping ZENG Guang wang su Bin QIN Guangxi Key Laboratory Cultivation Base of Cross-border E-commerce Intelligent Information Processing Guangxi University of Finance and Economics

Let I be a compact interval of real axis R, and （L, H） be the metric space of all nonempty closed subintervals of I with the Hausdorff metric H and f ： I →L be a continuous multi-valued map. Assume that Pn = （x0, x1,..., xn） is a return trajectory of f and that p ∈ [min Pn, max Pn] with p ∈ f（p）. In this paper, we show that if there exist k （≥ 1） centripetal point pairs of f （relative to p） in {（xi;xi＋l）： 0 ≤ i ≤ n- 1} and n =sk＋r （0 ≤ r ≤ k - 1）, then f has an R-periodic orbit, where R=s＋1 ifsiseven, and R =s if s is odd and r = 0, and R=s＋2 if s is odd and r 〉0. Besides, we also study stability of periodic orbits of continuous multi-valued maps from I to L.

关键词： Continuous multi-valued map periodic orbit stability

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