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Chinese Journal of Chemistry 2013年第12期31卷 1546-1550页

作者： Lili Zhang Jing sun Chaoguo yan College of Chemistry & Chemical Engineering Yangzhou University Yangzhou Jiangsu 225002 China

The one-pot sequential reaction of arylamines, methyl propiolate and 2-aryl-3-nitrochromenes without any catalyst in refluxing ethanol afforded the polysubstituted 3-（3-nitro-2-phenylchroman-4-yl）-3-arylaminoacrylates in good yields and with high diastereoselectivity. Reaction mechanism was believed involving the initial formation of β-enamino ester and sequential Michael addition.

关键词： chromene propiolate acrylate arylamine one-pot reaction diastereoselectivity

Two new species of free-living nematodes from the East China Sea

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Acta Oceanologica Sinica 2018年第10期37卷 148-151页

作者： sun yan HUANG Mian HUANG Yong College of Life Sciences Liaocheng University

Two new species of free-living marine nematodes of the genera Hopperia and Nemanema are described from the sublittoral sediment of the East China Sea. Hopperia macramphida sp. nov. is characterized by having large amphidial fovea with five turns; arcuate spicules with enlarged proximal end and central internal lamella extending one third of spicule length from proximal end; gubernaculum with bent apophyses, six papilliform precloacal supplements; and conico-cylindrical tail with swollen tip and terminal setae. Nernanema minutum sp, nov. is characterized by relatively smaller body size in the genus; large oval amphidial fovea; conical tail; slender spicules with alae and hooked proximal end; ring-like gubernaculum; and papilliform precloacal supplements with three short setae. An updated dichotomous key is provided for the 17 species of Hopperia.

关键词： Hopperia macramphida sp. nov. Nemanema minium sp. nov. marine nematode taxonomy

Analysis of the management and therapeutic performance of diabetes mellitus employing special target

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World Journal of Diabetes 2023年第12期14卷 1721-1737页

作者： Hong-yan sun Xiao-yan Lin Department of Endocrine and Metabolic Diseases Yantaishan HospitalYantai 264003Shandong ProvinceChina

Diabetes mellitus (DM) is a chronic metabolic condition characterized predominantlyby hyperglycemia. The most common causes contributing to the pathophysiologyof diabetes are insufficient insulin secretion, resistance to insulin’stissue-acting effects, or a combination of both. Over the last 30 years, the globalprevalence of diabetes increased from 4% to 6.4%. If no better treatment or cure isfound, this amount might climb to 430 million in the coming years. The major fact-ors of the disease’s deterioration include age, obesity, and a sedentary *** new therapies to manage diabetes safely and effectively without jeopardizingpatient compliance has always been essential. Among the medicationsavailable to manage DM on this journey are glucagon-like peptide-1 agonists,thiazolidinediones, sulphonyl urease, glinides, biguanides, and insulin-targetingreceptors discovered more than 10 years ago. Despite the extensive preliminarystudies, a few clinical observations suggest this process is still in its early *** present review focuses on targets that contribute to insulin regulation andmay be employed as targets in treating diabetes since they may be more efficientand secure than current and traditional treatments.

关键词： Diabetes mellitus Hyperglycemia Therapeutic performance Management Special target Literature review

Analysis of subscription characteristics and user mobility in different types of MMORPGs

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The Journal of China Universities of Posts and Telecommunications 2009年第6期16卷 121-128页

作者： PENG Hui sun yan-li WU Hong School of Economics and Management Beijing University of Posts and Telecommunications Beijing 100876 China

Massively multiplayer online role-playing game（MMORPG） is one of the fastest-growing segments of the online game *** subscription refers to game accounts logged in during a certain period of *** user mobility explains the dynamics of subscriber size *** article explores the subscription characteristics and user mobility in different types of *** is found that subscription characteristics in different types of MMORPGs are marked by *** one hand,the curve of competition-based game subscription is linear,and the stability period is short,therefore it is necessary for the game operators to introduce new versions *** the other hand,the gradient rate of subscription in the community-based game is slow at first and then fast,and the stability period is long,hence it will take the game operator a long cycle to launch a new *** difference of subscription curve is caused by the fact that user mobility in competition-based game is higher than in the community-based game,as attractiveness of community-based game can maintain a longer period due to network *** purpose of the study is to help the game operator to understand the development stage and features of the game and to make effective decisions to attract more players.

关键词： virtual reality online game subscription characteristics user mobility subscription curve life cycle MMORPG

A Janus separator towards dendrite-free and stable zinc anodes for long-duration aqueous zinc ion batteries

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Journal of Energy Chemistry 2023年第6期81卷 583-592,I0013页

作者： yan sun Qinping Jian Tianshuai Wang Bin Liu Yuhan Wan Jing sun Tianshou Zhao Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong 999077China Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen 518055GuangdongChina School of Chemistry and Chemical Engineering Northwestern Polytechnical UniversityXi’an 710129ShaanxiChina

Critical issues of Zn anodes including undesirable dendrites formation and parasitic reactions severely limit the reversibility and cyclability of Zn *** address these issues,a functional Janus separator with the structure of a mechanically strong sulfonated poly(arylene ether sulfone)(SPAES)dense layer composited on a porous glass fiber(GF)substrate is *** SPAES dense layer that faces the Zn anode containing abundant sulfonic acid groups effectively promotes the desolvation process of hydrated Zn ions,guides uniform Zn ion transfer,and blocks anions and water,contributing to dendrite-free and highly reversible Zn plating/stripping cycles,while the porous GF substrate retains high electrolyte *** a result,the Zn symmetric cell with the Janus separator demonstrates an ultralong cycling lifespan of over 2000 h at the areal capacity of 1 m A h cm^(-2),which is 23-fold superior to that with a pristine glass fiber separator(<90 h).More impressively,the as-prepared Janus separator enables outstanding rate performance and excellent cycling stability of full Zn ion batteries with diverse cathode *** instance,when paired with the V_2O_(5)cathode,the full battery with a Janus separator attains an ultrahigh initial specific capacity of 416.3 m A h g^(-1)and capacity retention of 60%over 450 cycles at 1 A g^(-1),exceeding that with a glass fiber ***,this work provides a facile yet effective approach to mitigating the dendrites formation and ameliorating the parasitic reactions of Zn metal anodes for high-performance Zn ion batteries.

关键词： Janus separator Sulfonated poly(arylene ether sulfone) Dendrite-free Side reaction suppression Aqueous zinc-ion batteries

Thermochemical decomposition of phosphogypsum with Fe-P slag via a solid-state reaction

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Chinese Journal of Chemical Engineering 2022年第7期35卷 113-119页

作者： Lei sun Zhongjun Zhao Xiushan yang yan sun Quande Li Chunhui Luo Qiang Zhao School of Chemical Engineering Sichuan UniversityChengdu 610065China School of Mechanical Engineering Chengdu UniversityChengdu 610106China State Key Laboratory of Long-Life High Temperature Materials Deyang 618000China Dongfang Electric Corporation Dongfang Turbine Co. LtdDeyang 618000China

Phosphogypsum is a solid waste sourced from the wet-process phosphoric acid industry,which causes severe environmental *** utilization was limited by its high decomposition temperature and high energy ***,an Fe-P slag,which is a solid waste that mainly comprises iron phosphide(FeP)and diiron phosphide(Fe_(2)P),can dramatically decrease the decomposition temperature of *** was found that the Fe-P slag and CaSO_(4) can react as shown in the following reaction equation:2Fe_(1.5)P+3CaSO_(4)+6CO_(2)→Ca_(3)(PO_(4))_(2)+Fe_(3)O_(4)+3SO_(2)+*** reaction mechanism was further determined using the thermodynamic *** was found that CaS was the key intermediate for this *** CaSO_(4) conversion for this method can reach approximately 97%under the optimized roasting conditions:the molar ratio between Fe_(1.5) P and CaSO_(4) of 2:3,roasting temperature of 900℃,a roasting time of 8 h.

关键词： Phosphogypsum Decomposition Mechanism Thermodynamic Roasting conditions

On establishment of novel constitutive model for directionally solidified nickel-based superalloys utilizing machine learning methods

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China Foundry 2023年第5期20卷 365-375页

作者： Jia-yan sun Rong Yin Ye-yuan Hu Yun-xiang Tan Qing-yan Xu Key Laboratory for Advanced Materials Processing Technology(MOE) School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Xiaomi AI Lab Beijing100102China

To enhance the accuracy of mechanical simulation in the directional solidification process of turbine blades for heavy-duty gas turbines,a new constitutive model that employs machine learning methods was *** model incorporates incremental learning and transfer learning,thus improves the predictive accuracy and generalization *** account for the anisotropy of the directionally solidified alloy,a deformation direction parameter is added to the model,enabling prediction of the stress-strain relationship of the alloy under different deformation *** predictive capabilities of both models are evaluated using correlation coefficient(R),average relative error(δ),and value of relative error(RE).Compared to the traditional model,the machine learning constitutive model achieves higher prediction accuracy and better generalization *** offers a new approach for the establishment of flow constitutive models for other directionally solidified and single-crystal superalloys.

关键词： Ni-based superalloy constitutive model machine learning directional solidification anisotropy

Genetic perspectives on childhood monogenic diabetes:Diagnosis,management,and future directions

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World Journal of Diabetes 2023年第12期14卷 1738-1753页

作者： Hong-yan sun Xiao-yan Lin Department of Endocrine and Metabolic Diseases Yantaishan HospitalYantai 264003Shandong ProvinceChina

Monogenic diabetes is caused by one or even more genetic variations, which maybe uncommon yet have a significant influence and cause diabetes at an early *** diabetes affects 1 to 5% of children, and early detection and geneticallyfocused treatment of neonatal diabetes and maturity-onset diabetes of theyoung can significantly improve long-term health and well-being. The etiology ofmonogenic diabetes in childhood is primarily attributed to genetic variationsaffecting the regulatory genes responsible for beta-cell activity. In rare instances,mutations leading to severe insulin resistance can also result in the developmentof diabetes. Individuals diagnosed with specific types of monogenic diabetes,which are commonly found, can transition from insulin therapy to sulfonylureas,provided they maintain consistent regulation of their blood glucose *** have successfully devised materials and methodologies to distinguishindividuals with type 1 or 2 diabetes from those more prone to monogenicdiabetes. Genetic screening with appropriate findings and interpretations isessential to establish a prognosis and to guide the choice of therapies andmanagement of these interrelated ailments. This review aims to design a comprehensiveliterature summarizing genetic insights into monogenetic diabetes inchildren and adolescents as well as summarizing their diagnosis and management.

关键词： Monogenic diabetes Maturity-onset diabetes of the young Insulin resistance Genetic mutation Beta-cell function

Did Species and Functional Diversities of Sandy Intertidal Marine Nematodes Reveal Similar Response to Environmental Changes?

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Journal of Ocean University of China 2023年第2期22卷 527-540页

作者： SONG Huili MU Fanghong sun yan HUA Er College of Marine Life Sciences Ocean University of ChinaQingdao 266003China

Free living marine nematodes were sampled from two sandy beaches in Dalian City,in December of 2015,and April,July,and October of *** spatial and seasonal variations of marine nematode species diversity(based on species abundance dataset)and functional diversity(based on functional traits dataset:feeding types and life history strategies)were investigated to understand the environmental drivers and how they respond to specific environmental *** granularity was revealed to be the main environmental factor causing spatial differences in nematode diversity indices between the two *** diversity indices,namely species number,Margalef index,Shannon-Wiener diversity index(H’),were higher in fine-grained sediments,while the functional diversity indices,including functional evenness,functional dispersion,and Rao’s quadratic entropy index(RaoQ),were higher in coarse-grained *** species diversity indices also fluctuated with seasonal variations of temperature,dissolved oxygen,pH,salinity,and sediment chlorophyll-a within the study ***,functional diversity indices did not show significant seasonal variations and exhibited weak correlation with the studied environmental ***,the functional diversity indices were negatively correlated with the species diversity indices,suggesting an inconsistent response to environmental changes.A decrease in nematode species diversity in coarse sands,accompanied by an increase in functional diversity,can be regarded as an early warning signal of environment *** more biological traits are involved in calculating functional diversity indices,it will be helpful for the future study of the internal connections of species diversity and functional diversity.

关键词： marine nematode species diversity functional diversity functional traits sandy beaches

Electrocatalysis of Oxygen Evolution Reaction on Ti/SnO_2+RuO_2+MnO_2/MnO_2 Electrode in Sulfuric Acid Solution

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Chemical Research in Chinese Universities 2001年第3期17卷 287-292页

作者： LIANG Zhen-hai FAN Cai-mei sun yan-ping Laboratory of Electrochemical Engineering Research College of Chemical EngineeringTaiyuan University of TechnologyTaiyuan 030024P.R.China

The Ti-Supported MnO_2 electrode was modified by introducing SnO_2+RuO_2+MnO_2 as an intermediate layer into the Ti/MnO_2 interface. The anodic polarization curves were measured at various temperatures ranging from 30 to 80℃ and the activation energy for the oxygen evolution reaction was evaluated. The experimental activation energy increased linearly with increasing the overpotential. The activation energy at the equilibrium potential was linearly correlated with the difference between the crystal field stabilization energies of Mn^(4+) at initial state and Mn^(4+) at transition state. The electrocatalysis characteristics of the anode were discussed by means of the mechanism of the substitution reaction of the ligand(S_N1 and S_N2) and molecular orbital theory. The results show that the anode has better electrocatalystic characteristics.

关键词： Ti/SnO2+RuO2+MnO2/MnO2 anode Electroeatalysis Activation energy Crystal field theory Molecular Orbital theory