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高速破片穿透液舱的数值模拟研究

振动与冲击 2019年第6期38卷 144-150页

作者：徐思博孟子飞刘文韬曹雪雁哈尔滨工程大学船舶工程学院哈尔滨150001

在水下近场爆炸载荷的研究中,高速破片侵彻问题异常复杂,由于爆炸实验的不可重复性和危险性,如何运用数值仿真较好地模拟侵彻问题一直备受关注。运用耦合的欧拉-拉格朗日(CEL)算法,开展了高速破片侵彻液舱实验模型的仿真,验证了CEL算法... 详细信息

在水下近场爆炸载荷的研究中,高速破片侵彻问题异常复杂,由于爆炸实验的不可重复性和危险性,如何运用数值仿真较好地模拟侵彻问题一直备受关注。运用耦合的欧拉-拉格朗日(CEL)算法,开展了高速破片侵彻液舱实验模型的仿真,验证了CEL算法在处理侵彻问题的可靠性和准确性;在此基础上,开展了不同破片速度和液体装载量对穿透压力和空穴演化的影响研究。结果表明:破片速度衰减规律、空穴演化以及侵彻过程中压力时历曲线与实验值基本一致;弹道远离液面时,液体装载量并不影响速度衰减规律;随着与自由液面距离减小,近自由液面入射弹道非对称性差异可由20%增加到48%;破片初始速度增加,前置隔板的变形略有增加,后置隔板的变形呈非线性增长。

关键词：高速破片液舱 CEL方法侵彻问题空穴演化

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高尿酸血症与非酒精性脂肪肝的关系研究进展

济宁医学院学报 2020年第1期43卷 59-62,67页

作者：徐思博(综述) 刘晓静(审校) 青岛大学附属医院青岛266000 青岛大学医学部临床医学院青岛266071

高尿酸血症(hyperuricemia,HUA)是由于人体内嘌呤代谢紊乱所导致。非酒精性脂肪性肝病(nonalcoholic fatty liver disease,NAFLD)是临床最常见的慢性肝病之一,并且患病率呈现不断上升趋势。流行病学研究显示,HUA人群中NAFLD的患病率增高... 详细信息

高尿酸血症(hyperuricemia,HUA)是由于人体内嘌呤代谢紊乱所导致。非酒精性脂肪性肝病(nonalcoholic fatty liver disease,NAFLD)是临床最常见的慢性肝病之一,并且患病率呈现不断上升趋势。流行病学研究显示,HUA人群中NAFLD的患病率增高,病变程度加重,HUA是发生NAFLD的独立影响因素之一。两者相互作用机制可能与HUA导致的肝细胞脂质代谢紊乱、氧化应激损伤和胰岛素敏感性下降有关。目前尚无HUA直接诱导NAFLD的动物实验模型或高尿酸加重NAFLD的动物模型,两者相互作用的具体机制仍不明确,有待进一步研究。

关键词：高尿酸血症非酒精性脂肪肝氧化应激

Enhanced Corrosion Resistance and Discharge Performance of Mg-MnO2 Battery by Na2SiO3 Additive

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Chemical Research in Chinese Universities 2019年第4期35卷 641-646页

作者： xu Jing HU Jie HU sibo College of Chemistry and Chemical Engineering Xinyang Normal UniversityXinyang 464000P. R.China College of Environment and Quality Inspection Chongqing Chemical Industry Vocational College Chongqing 400020 P. R. China

Corrosion resistance and delayed action are major obstacles that severely limit the practical application of Mg alloy in battery fields. In this work, the effects of Na2SiO3 on the electrochemical behavior of the AZ31B Mg alloy in MgSO4-Mg(NO3)2 composite solution[0.14 mol/L MgSO4,1.86 mol/L Mg(NO3)2] were investigated. Electrochemical tests were carried out using electrochemical impedance spectroscopy, galvanostatic discharge, and linear sweep voltammograms. The results indicate that the impedance value increases by nearly fourfold, and the delayed time decreases from 2.1 s to 0.6s. Battery perfoniiance test reveals that the addition of Na2SiO3 significantly improves the discharge specific capacity of Mg-MnO2. The surface morphology and composition of corrosion products from Mg alloys were studied by scanning electron microscopy(SEM) and Fourier translonn infrared spectroscopy(FTIR), respectively. The SEM images of the AZ31B Mg alloys in composite solution with or without Na2SiO3 additive have an evident distinction due to the ionnation of new insoluble *** result confirms that the corrosion products accumulated on the alloy surface in the electrolyte containing Na2SiO3 are mainly composed of Mg(OH)2, MgCO3, and MgSiO3.

关键词： Mg-MnO2 battery7 Na2SiO3 Corrosion resistance Delayed action Discharge capacity

Contribution and Prospect of Erect Panicle Type to Japonica Super Rice

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Rice science 2021年第5期28卷 431-441页

作者： Chen sibo Tang Liang Sun Jian xu Quan xu Zhengjin Chen Wenfu Rice Research Institute Shenyang Agricultural University/Key Laboratory of Northern geng Super Rice BreedingMinistry of EducationShenyang 110866China

Over the past 30 years,super rice played an important role in boosting rice *** phenotype of erect panicle(EP)architecture controlled by dense and erect panicle 1(dep1)is the typical characteristic of super rice,and the phenotype has been used in rice breeding for nearly a *** this review,the molecular genetic basis of EP phenotype,and mechanism of how dep1 affects rice carbon,nitrogen metabolism and grain quality(grain shape and taste quality)were *** addition,we discussed the possible improvement strategies of rice yield and *** review provides a quick overview of the whole process for rice quality formation,as well as suggestions and ideas for future research on rice quality improvement.

关键词： dep1 nitrogen cycle carbon cycle metabolic balance rice quality erect panicle super rice

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扩弓联合固定矫治后牙关系变化的研究

口腔材料器械杂志 2023年第3期32卷 171-175页

作者：冯海亮章燕珍王可徐思博李彬红浙江大学医学院附属第二医院临平院区口腔科杭州311100 浙江大学医学院附属第二医院综合牙科杭州310000

目的评价扩弓联合固定矫治后青少年患者的牙关系变化及临床疗效。方法追踪观察采用上下颌扩弓结合MBT直丝弓矫治器矫治完成的青少年患者,共收集到13例患者治疗前后和保持后的石膏模型并对其进行测量,比较治疗前后及保持后的牙弓宽度... 详细信息

目的评价扩弓联合固定矫治后青少年患者的牙关系变化及临床疗效。方法追踪观察采用上下颌扩弓结合MBT直丝弓矫治器矫治完成的青少年患者,共收集到13例患者治疗前后和保持后的石膏模型并对其进行测量,比较治疗前后及保持后的牙弓宽度变化及PAR指数评分。结果治疗后上下颌牙弓宽度明显增加(P<0.05),其中上颌中段牙弓宽度变化最大,为(6.54±2.48) mm。保持后上颌前中段牙弓宽度虽然减小(P<0.05),但与治疗前比较差异仍具有明显统计学意义。治疗前后各项PAR分值减少差异有统计学意义,保持前后各项PAR分值变化无统计学意义。矫治后等级分类中,极大改善患者7例,改善6例,无改善或变坏0例。结论对于牙列拥挤伴牙弓狭窄的青少年患者,运用上下颌扩弓联合固定矫治能获得良好的牙关系。

关键词：扩弓牙列拥挤牙弓狭窄 PAR指数

The synergistic regulatory effect of PTP1B and PTK inhibitors on the development of Oedaleus decorus asiaticus Bei-Bienko

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Journal of Integrative Agriculture 2024年第8期23卷 2752-2763页

作者： Shuang Li sibo Liu Chaomin xu Shiqian Feng Xiongbing Tu Zehua Zhang State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193China Chongqing Academy of Agricultural Sciences Chongqing 401329China Institute of Grassland Research Chinese Academy of Agricultural SciencesHohhot 010010China Inner Mongolia University Hohhot 010019China Scientific Observation and Experimental Station of Pests in Xilin Gol Rangeland Institute of Plant ProtectionChinese Academy of Agricultural SciencesXilinhot 026000China

Tyrosine phosphorylation is crucial for controlling normal cell growth,survival,intercellular communication,gene transcription,immune responses,and other *** tyrosine phosphatase(PTP)and protein tyrosine kinases(PTK)can achieve this goal by regulating multiple signaling *** decorus asiaticus is an important pest that infests the Mongolian Plateau *** aimed to evaluate the survival rate,growth rate,overall performance,and ovarian developmental morphology of the 4th instar nymphs of *** asiaticus while inhibiting the activity of protein tyrosine phosphatase-1B(PTP1B)and *** addition,the expression and protein phosphorylation levels of key genes in the MAPK signaling pathway and antioxidant enzyme activity were *** results showed no significant differences in survival rate,growth rate,or overall performance between PTP1B inhibitor treatment and ***,after PTK inhibitor treatment,these indexes were significantly lower than those in the *** ovarian size of female larvae after 15 days of treatment with PTK inhibitors showed significantly slower development,while female larvae treated with PTP1B exhibited faster ovarian growth than the control *** comparison to controls and nymphs treated with PTK inhibitors,the expression and phosphorylation levels of key genes in the MAPK signaling pathway under PTP1B inhibitor treatments were significantly higher in 4th instar ***,reactiveoxygen(ROS)species levels and the activities of NADPH oxidase and other antioxidant enzymes were considerably reduced,although they were significantly greater in the PTK inhibitor *** results suggest that PTP1B and PTK feedback inhibition in the mitogen-activated-protein kinases(MAPK)signal transfer can regulate the physiological metabolism of the insect as well as its developmental *** findings can facilitate future uses of PTP1B and PTK inhibitors in controlling insect development to help contro

关键词： PTP1B PTK inhibitor MAPK pathway Oedaleus decorus asiaticus development

Symmetry-adapted graph neural networks for constructing molecular dynamics force fields

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Science China(Physics,Mechanics & Astronomy) 2021年第11期64卷 118-126页

作者： Zun Wang Chong Wang sibo Zhao ShiQiao Du Yong xu Bing-Lin Gu WenHui Duan State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics Tsinghua UniversityBeijing 100084China Department of Physics Carnegie Mellon UniversityPittsburgh 15213USA Institute for Advanced Study Tsinghua UniversityBeijing 100084China Frontier Science Center for Quantum Information Beijing 100084China RIKEN Center for Emergent Matter Science(CEMS) WakoSaitama 351-0198Japan

Molecular dynamics is a powerful simulation tool to explore material *** realistic material systems are too large to be simulated using first-principles molecular *** molecular dynamics has a lower computational cost but requires accurate force fields to achieve chemical *** this work,we develop a symmetry-adapted graph neural network framework called the molecular dynamics graph neural network(MDGNN)to construct force fields automatically for molecular dynamics simulations for both molecules and *** architecture consistently preserves translation,rotation,and permutation invariance in the *** also propose a new feature engineering method that includes high-order terms of interatomic distances and demonstrate that the MDGNN accurately reproduces the results of both classical and first-principles molecular *** addition,we demonstrate that force fields constructed by the proposed model have good *** MDGNN is thus an efficient and promising option for performing molecular dynamics simulations of large-scale systems with high accuracy.

关键词： graph neural networks molecular dynamics force fields

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R-Symmetric NMSSM

Chinese Physics C 2023年第4期47卷 81-88页

作者：徐帅郑思波 School of Physics and Telecommunications Engineering Zhoukou Normal UniversityZhoukou 466001China Department of Physics Chongqing UniversityChongqing 401331China

It is well known that the observed Higgs mass is more naturally explained in the next-to-minimal supersymmetric standard model(NMSSM)than in the minimal supersymmetric standard *** any violation of this success,there are variants of the NMSSM that can lead to new *** this study,we propose a new variant of the NMSSM by imposing an unbroken R *** first identify the minimal structure of such a scenario from the perspective of both simplicity and viability,then compare the model predictions to current experimental limits,and finally highlight the main features that differ from those of well-known scenarios.

关键词： R symmetry NMSSM MSSM

Delayed stress memory by CaAl_(2)O_(4):Eu^(2+) mechanoluminescent phosphor with defect engineering regulation

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Journal of Advanced Ceramics 2022年第8期11卷 1319-1329页

作者： Yiyu CAI sibo LIU Lei ZHAO Chao WANG Hongyu LV Bitao LIU Jianbei QIU xuhui xu xue YU School of Mechanical Engineering Institute for Advanced MaterialsChengdu UniversityChengdu 610106China College of Materials Science and Engineering Key Laboratory of Advanced Materials of Yunnan ProvinceKunming University of Science and TechnologyKunming 650093China Department of Orthopedics The First People’s Hospital of Yunnan ProvinceKunming 650093China School of Physics and Opto-Electronic Technology Baoji University of Arts and SciencesBaoji 721016China Research Institute for New Materials Technology Chongqing University of Arts and SciencesChongqing 402160China

Real-time stress sensing based on mechanoluminescence materials has been widely studied for structural health monitoring of bridges,buildings,high-pressure vessels,and other infrastructure ***,this approach is difficult to detect the stress information of closed mechanical ***,we propose a delayed stress memory strategy to record the stress information of closed mechanical structure by the flexible film composed with CaAl_(2)O_(4):Eu^(2+),Sm^(3+)*** the force is applied,the optical information on the film can be read out by the near-infrared laser after a period of time without real-time monitoring,and the stress distribution information of bearings and gears in the engine can be ***,the regulation of trap depth from 0.662 to 1.042 eV allows the captured carriers to remain in the traps for a long time without being released as long persistent luminescence,which is beneficial to the delayed stress ***,this work promotes the application prospect of mechanoluminescence materials in stress sensing,and provides a new idea to record the stress information of closed mechanical structures.

关键词： delayed stress memory mechanoluminescent film stress information defect engineering closed mechanical structure