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The X-structure/mechanism approach to beneficial nonlinear design in engineering

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Applied Mathematics and Mechanics(English Edition) 2022年第7期43卷 979-1000页

作者： Xingjian jing Department of Mechanical Engineering City University of Hong KongKowloon TongHong KongChina

Nonlinearity can take an important and critical role in engineering systems,and thus cannot be simply ignored in structural design,dynamic response analysis,and parameter selection.A key issue is how to analyze and design potential nonlinearities introduced to or inherent in a system under *** is a must-do task in many practical applications involving vibration control,energy harvesting,sensor systems,robotic technology,*** paper presents an up-to-date review on a cutting-edge method for nonlinearity manipulation and employment developed in recent several years,named as the X-structure/mechanism *** method is inspired from animal leg/limb skeletons,and can provide passive low-cost high-efficiency adjustable and beneficial nonlinear stiffness(high static&ultra-low dynamic),nonlinear damping(dependent on resonant frequency and/or relative vibration displacement),and nonlinear inertia(low static&high dynamic)individually or *** X-structure/mechanism is a generic and basic structure/mechanism,representing a class of structures/mechanisms which can achieve beneficial geometric nonlinearity during structural deflection or mechanism motion,can be flexibly realized through commonly-used mechanical components,and have many different forms(with a basic unit taking a shape like X/K/Z/S/V,quadrilateral,diamond,polygon,etc.).Importantly,all variant structures/mechanisms may share similar geometric nonlinearities and thus exhibit similar nonlinear stiffness/damping properties in ***,they are generally flexible in design and easy to *** paper systematically reviews the research background,motivation,essential bio-inspired ideas,advantages of this novel method,the beneficial nonlinear properties in stiffness,damping,and inertia,and the potential applications,and ends with some remarks and conclusions.

关键词： nonlinear stiffness nonlinear damping nonlinear inertia vibration

山姜素调节cAMP/PKA/CREB信号通路促进骨质疏松性骨折大鼠骨折愈合

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中国组织工程研究 2025年第12期29卷 2438-2443页

作者：陆飞周静金涛连云港市第一人民医院康复医学科江苏省连云港市222000 南京医科大学康达学院康复医学部江苏省连云港市222000 中国人民解放军东部战区总医院健康医学科江苏省南京市210018

背景:山姜素具有抗炎、抗肿瘤、抗菌等作用,已被证实能够缓解骨质疏松症,但山姜素对骨质疏松性骨折的影响及机制仍不清楚。目的:探讨山姜素调节环磷酸腺苷/蛋白激酶A/环磷酸腺苷反应元件结合蛋白信号通路对骨质疏松性骨折大鼠的改善作... 详细信息

背景:山姜素具有抗炎、抗肿瘤、抗菌等作用,已被证实能够缓解骨质疏松症,但山姜素对骨质疏松性骨折的影响及机制仍不清楚。目的:探讨山姜素调节环磷酸腺苷/蛋白激酶A/环磷酸腺苷反应元件结合蛋白信号通路对骨质疏松性骨折大鼠的改善作用。方法:采用双侧卵巢切除手术构建骨质疏松症骨折大鼠模型,将成功造模大鼠依据随机数字表法分为山姜素低、中、高剂量组、抑制剂组和模型组,另选12只大鼠作为假手术组。骨折造模当天,山姜素低、中、高剂量组大鼠灌胃7.5,15,30 mg/kg的山姜素+腹腔注射等量的生理盐水,抑制剂组灌胃30 mg/kg的山姜素+腹腔注射5 mg/kg的H-89(通路抑制剂),模型组与假手术组给予(灌胃+腹腔注射)等量生理盐水,1次/d,连续8周。放射性检查评估大鼠骨折愈合情况并进行愈合评分;骨密度扫描仪测定骨折处骨密度;通过三点弯曲实验和压缩实验评估大鼠股骨生物力学状况;苏木精-伊红染色观察大鼠骨折处病理损伤;酶联免疫吸附(ELISA)法检测血清碱性磷酸酶、骨钙素和Ⅰ型胶原交联C-末端肽、环磷酸腺苷水平的变化;Western blot检测股骨组织中骨形态发生蛋白2和环磷酸腺苷/蛋白激酶A/环磷酸腺苷反应元件结合蛋白通路蛋白表达。结果与结论:①相较于假手术组,模型组大鼠骨折愈合评分、骨密度、最大负荷、最大应力、碱性磷酸酶、骨钙素、环磷酸腺苷水平、骨形态发生蛋白2、磷酸化蛋白激酶A/蛋白激酶A、磷酸化环磷酸腺苷反应元件结合蛋白/环磷酸腺苷反应元件结合蛋白表达下降,Ⅰ型胶原交联羧基末端肽水平增加(P<0.05);与模型组比较,山姜素各剂量组大鼠上述各项指标呈现相反的变化(P<0.05);与山姜素高剂量组比较,抑制剂组大鼠上述指标变化均被逆转(P<0.05)。②结论:山姜素可能通过激活环磷酸腺苷/蛋白激酶A/环磷酸腺苷反应元件结合蛋白信号通路加速骨质疏松症骨折大鼠的骨折愈合。

关键词：山姜素环磷酸腺苷/蛋白激酶A/环磷酸腺苷反应元件结合蛋白骨质疏松骨折愈合大鼠

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组合梁斜拉桥稳定性分析

山西建筑 2025年第2期51卷 166-168页

作者：荆华东山东省路桥集团有限公司山东济南250014

以一座组合梁斜拉桥为工程背景,采用有限元数值方法进行线弹性稳定分析。研究了裸塔状态、张拉一半拉索状态以及成桥运营状态下结构的稳定性,分析了施工线形误差对成桥运营状态稳定性的影响。结果表明,桥梁的稳定性满足规范要求,桥塔施... 详细信息

以一座组合梁斜拉桥为工程背景,采用有限元数值方法进行线弹性稳定分析。研究了裸塔状态、张拉一半拉索状态以及成桥运营状态下结构的稳定性,分析了施工线形误差对成桥运营状态稳定性的影响。结果表明,桥梁的稳定性满足规范要求,桥塔施工误差对成桥运营状态线弹性稳定安全系数影响较小。

关键词：组合梁斜拉桥稳定性屈曲模态数值模拟

A new study of neutrino energy loss of nuclides ^(53-60)Cr by electron capture in magnetars

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Research in Astronomy and Astrophysics 2013年第8期13卷 945-951页

作者： jing-jing Liu College of Sciences and Technology Qiongzhou University

Following the theory of relativity, in the presence of an ultrastrong magnetic field （UMF） and utilizing a nuclear shell model, we carry out an estimation of the neutrino energy loss （NEL） rates of nuclides ^53-60Cr, which occur by electron capture in magnetars. The results show that the NEL rates greatly increase when a UMF is present, and can even exceed nine orders of magnitude at relatively lower density and temperature （e.g. ρ7 = 5.86, Ye = 0.47, T9 = 7.33） in the range from 1013 G to 1018 G. However, the increase in rates was no more than six orders of magnitude at relatively higher density and temperature （e.g.ρ7 = 4.86 × 10^8, Ye = 0.39, T9 = 14.35）.

关键词： physical data and processes: neutrinos nuclear reactions - stars: super- novae - stars: evolution

Neutrino energy spectrum and electron capture of Nuclides^(56))Fe,^(56)Co,^(56)Ni,^(56)Mn,^(56)Cr and^(56)V in stellar interiors

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Research in Astronomy and Astrophysics 2014年第8期14卷 971-978页

作者： jing-jing Liu College of Science and Technology Qiongzhou University

Based on the shell-model Monte Carlo method and random phase approximation theory, the neutrino energy spectrum （NES） and the electron capture （EC） of ^56Fe, ^56Co, ^56Ni, ^56Mn, ^56Cr and ^56V are investigated in presupemova surroundings. The results show that the EC rates are affected greatly at different densities and temperatures. The rates increase greatly and even exceed six orders of magnitude at lower temperature. On the other hand, the NES is very sensitive to stellar temperature and electron energy. The higher the temperature and the lower the electron energy, the larger the influence on NES is. For example, the maxima of NES in the ground state are 9.02, 160, 80, 24.01, 0.44, 1.42 me c^2 for ^56Fe, ^56Co, ^56Ni, ^56Mn, ^56Cr and ^56V respectively at ρ7 = 10.7, Ye = 0.45 and T9 = 15. Furthermore, the influence on NES due to EC for different nuclei has some otherness because of different Qo-values. For example, the spectrum of ^56Co shows a double bump structure.

关键词： physical data and processes neutrinos, nuclear reactions -- stars super- novae -- stars evolution

Dielectric-ion-conductive ZnNb2O6 layer enabling rapid desolvation and diffusion for dendrite-free Zn metal batteries

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Journal of Energy Chemistry 2025年第1期 693-701页

作者： Haifeng Yang Jian Wang Panpan Zhang Xiaomin Cheng Qinghua Guan jing Dong Bixian Chen Lujie Jia jing Zhang Yongzheng Zhang Yunjian Liu Hongzhen Lin School of Materials Science and Engineering Jiangsu University i-Lab & CAS Key Laboratory of Nanophotonic Materials and Devices Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Helmholtz Institute Ulm (HIU) Karlsruhe Institute of Technology (KIT) School of Materials Science and Engineering Xi'an University of Technology State Key Laboratory of Chemical Engineering East China University of Science and Technology

Rechargeable aqueous zinc-metal batteries （AZMBs） are promising candidates for large-scale energy storage systems due to their low cost and high ***,their performance and sustainability are significantly hindered by the sluggish desolvation kinetics at the electrode/electrolyte interface and the corresponding hydrogen evolution reaction where active water molecules tightly participate in the Zn（H2O）62+solvation ***,learnt from self-generated solid electrolyte interphase （SEI） in anodes,the dielectric but ion-conductive zinc niobate nanoparticles artificial layer is constructed on metallic Zn surface （ZNB@Zn）,acting as a rapid desolvation *** zincophilic and dielectric-conductive properties of ZNB layer accelerate interfacial desolvation/diffusion and suppress surface corrosion or dendrite formation,achieving uniform Zn plating/stripping behavior,as confirmed by electronic/optical microscopies and interface spectroscopical measurements together with theoretical ***,the as-prepared ZNB@Zn electrode exhibits excellent cycling stability of over 2000 h and robust reversibility （99.54%） even under high current density and depth of discharge ***,the assembled ZNB@Zn-based full cell displays high capacity-retention rate of 80.21%after 3000 cycles at 5 A g-1and outstanding rate performance up to 10 A *** large-areal pouch cell is stabilized for hundreds of cycles,highlighting the bright prospects of the dielectric but ion-conductive layer in further application of AZMBs.

关键词：

Strong screening effects on resonant nuclear reaction ^(23)Mg(p,γ) ^(24)Al in the surface of magnetars

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Research in Astronomy and Astrophysics 2016年第5期16卷 117-124页

作者： jing-jing Liu College of Electronic and Communication Engineering Hainan Tropical Ocean University Department of Astronomy and Institute of Theoretical Physics and Astrophysics Xiamen University

Based on the theory of relativistic superstrong magnetic fields （SMFs）, by using the method of Thomas-Fermi-Dirac approximations, we investigate the problem of strong electron screening （SES） in SMFs and the influence of SES on the nuclear reaction of 23Mg （p, Y）24A1. Our calculations show that the nuclear reaction will be markedly effected by the SES in SMFs in the surface of magnetars. Our calculated screening rates can increase two orders of magnitude due to SES in SMFs.

关键词： physical data and processes: nuclear reactions nucleosynthesis abundances -- stars: neutron-- stars: magnetic fields

神经功能损伤程度分级指导下的康复训练在脑出血患者中的应用研究

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中国疗养医学 2025年第1期34卷 31-35页

作者：井冰信阳一五四医院神经外科河南信阳464000

目的观察神经功能损伤程度分级指导下的康复训练对脑出血患者预后情况的应用效果。方法本研究为前瞻性研究,研究对象为信阳一五四医院2022年1月至2023年1月收治的130例脑出血患者,采用计算机随机分组将入组患者分为常规组(65例)和分级组... 详细信息

目的观察神经功能损伤程度分级指导下的康复训练对脑出血患者预后情况的应用效果。方法本研究为前瞻性研究,研究对象为信阳一五四医院2022年1月至2023年1月收治的130例脑出血患者,采用计算机随机分组将入组患者分为常规组(65例)和分级组(65例),常规组实施常规康复治疗配合常规康复训练,分级组采用神经功能缺损量表(NIHSS)评估其神经功能损伤程度后,依据评估结果制定分级康复训练措施,训练结束后随访1年,比较两组患者的康复依从性,躯体平衡功能[Berg平衡量表(BBS)、世界神经病联合国际合作共济失调量表(ICARS)],肢体运动功能[简化Fugl-Meyer运动功能评定量表上肢(FMA-UL)、下肢(FMA-LL)评分]及预后情况。结果在不同康复措施下,分级组的康复依从性优良率92.31%(60/65)高于常规组73.85%(48/65),P<0.05;分级组治疗1个月、3个月后的BBS评分分别为(42.23±10.46)分、(48.22±10.35)分,均高于常规组(37.66±10.23)分、(42.29±10.41)分,ICARS评分分别为(40.22±5.35)分、(32.49±5.42)分,均低于常规组(43.36±5.33)分、(35.28±5.41)分,差异有统计学意义(P<0.05);分级组治疗1个月、3个月后的FMA-UL评分为(48.22±10.61)分、(56.44±10.27)分,均高于常规组(43.36±10.22)分、(51.25±10.34)分,FMA-LL评分分别为(18.44±3.25)分、(22.29±5.33)分,均高于常规组(16.25±3.41)分、(19.35±5.44)分,差异有统计学意义(P<0.05);分级组的不良预后发生率4.62%(3/65)低于常规组18.46%(12/65),差异有统计学意义(P<0.05)。结论神经功能损伤程度分级指导下的康复训练能增强脑出血患者的康复依从性,对改善患者躯体平衡功能、肢体运动功能及预后情况均有积极意义。

关键词：脑出血康复训练分级指导神经功能缺损量表预后情况

The Neutrino Energy Loss by Electron Capture of Nuclides ^(52,53,54,55,56)Fe in Core-Collapse Supernova

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Chinese Physics Letters 2012年第12期29卷 61-64页

作者： LIU jing-jing College of Sciences and Technology Qiongzhou UniversitySanya 572022

Using the shell-model Monte Carlo method and random phase approximation theory,we carry out an estimation on neutrino energy loss(NEL)of ^(52,53,54,55,56)*** find the NEL rates increase greatly at some typical stellar conditions,and even exceed eight orders of *** the other hand,in order to compare our results ofλ_(SMMC)^(LJ)(which are calculated by using the SMMC method)with those ofλ_(FFN)^(LJ)(which are calculated by using the Fuller-Fowler-Newman(FFN)method),the error factor C,betweenλ_(SMMC)^(LJ) andλ_(FFN)^(LJ),is discussed and shows that at higher density and temperature,the fit is fairly good for the two results(λ_(SMMC)^(LJ) andλ_(FFN)^(LJ)),and the maximum error is~6.20%.However,the maximum error is~95.50%(e.g.53Fe)at lower density and temperature.

关键词： temperature. 56Fe method