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形状记忆合金梁动力稳定性

西南交通大学学报 2005年第4期40卷 453-456页

作者：李映辉张清泉西南交通大学应用力学与工程系四川成都610031

基于形状记忆合金材料的热-力学行为和拟弹性行为本构关系及梁的动力学平衡方程,建立了该类梁横向振动非线性动力学模型.用平衡态定性分析法讨论了形状记忆合金梁的稳定性与材料相变的关系.研究表明,梁的横向振动平衡态的稳定性与材料... 详细信息

基于形状记忆合金材料的热-力学行为和拟弹性行为本构关系及梁的动力学平衡方程,建立了该类梁横向振动非线性动力学模型.用平衡态定性分析法讨论了形状记忆合金梁的稳定性与材料相变的关系.研究表明,梁的横向振动平衡态的稳定性与材料相的稳定性有对应关系.在马氏体相稳定的低温状态,系统有3个不动点,1个为稳定中心,另外2个为不稳定鞍点;在马氏体与奥氏体共存的中间温度状态,系统有5个不动点,3个为稳定的中心,2个为不稳定的鞍点;在奥氏体相稳定的高温度状态,系统有唯一稳定不动点.

关键词：稳定性形状记忆合金梁振动不动点相变

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烤烟病毒病对烤烟经济性状的影响

中国植保导刊 2005年第5期25卷 30-30,26页

作者：旃庆全李顺光陆松柏云南省玉溪市植保植检站云南玉溪653100 云南省通海县植保植检站云南玉溪652700

近年来,各地烤烟病毒病发生为害逐步加重.为给科学评估病毒病对烤烟产值的影响提供依据,我们于2004年在云南省通海县杨广镇兴义村做了该项调查工作.

关键词：烤烟病毒病经济性状产量指标品质指标

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脉冲鉴别电路(Ⅰ)

吉林大学自然科学学报 1979年第1期 61-64页

作者：崔占清权文富吉林大学计算机科学系吉林大学物理系

本文通过实验与原理分析,设计成一种简单可靠的脉冲边沿鉴别电路,可提高信噪比一个数量级,当用它去控制系统时,输出非常稳定,没有因噪音而引起的抖动。

关键词：信号脉冲时间常数脉冲鉴别电路微分电路逻辑电路脉冲宽度脉冲特性

A versatile synthetic strategy towards rare earth based metal-organic frameworks

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Science China Chemistry 2025年

作者： quan Shi Yun-Hao Xu Ming-Hui Chen Peng Zhao Wen-Bo Deng Ji Xiong Kai Guo Ya-qing Feng Bao zhang School of Chemical Engineering and Technology Tianjin University Tianjin Collaborative Innovation Center of Chemical Science and Engineering Guangdong Laboratory Chemistry & Fine Chemical Industry Jieyang Center

Rare earth metal-organic frameworks (RE-MOFs) have drawn wide attention owing to diverse network structures and various application ***,due to the unpredictable formation of the nodes,it is still challenging to design novel RE-MOFs.A novel versatile strategy was developed employing a RE-acetate complex (RE2(CH3COO)6·4H2O) as a precursor to construct RE-MOFs.2D RE-MOFs (RE-DBP) and 3D RE-MOFs (RE-TCPP) could be obtained by using dicarboxylic porphyrin ligands H2DBP and tetracarboxylic porphyrin ligands H2TCPP,*** RE-MOFs were further synthesized to verify the universality of the *** crystalline RE-MOFs could also be prepared at room temperature via the developed strategy,which could significantly promote large-scale preparation and practical application of *** proof of the concept,the performance of porphyrin-based RE-MOFs was investigated in the photocatalytic cycloaddition of CO2with *** the RE-DBP(Co) MOFs,Tb-DBP(Co) exhibited the best photocatalytic performance,which was also greater than that of the corresponding 3D MOF Tb-TCPP(Co) due to the optimal 2D structure and thus the accelerated photogenerated charge separation and transfer *** work not only provides a novel versatile strategy to design and develop RE-MOFs,but also proposes a promising approach for the potential bulk production of RE-MOFs at room temperature.

关键词：

三种气管切开术在危重症患者中的应用效果比较

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实用心脑肺血管病杂志 2016年第2期24卷 51-54页

作者：季中锟张静祎张庆泉山东省文登整骨医院五官科山东省威海市264200 烟台毓璜顶医院耳鼻喉科

目的比较传统外科气管切开术(TST)、经皮扩张气管切开术(PDT)、改良经皮扩张气管切开术(MPDT)在危重症患者中的应用效果。方法选取2008年5月—2015年5月在山东省文登整骨医院行气管切开机械通气的危重症患者155例,按照气管切开方式分为... 详细信息

目的比较传统外科气管切开术(TST)、经皮扩张气管切开术(PDT)、改良经皮扩张气管切开术(MPDT)在危重症患者中的应用效果。方法选取2008年5月—2015年5月在山东省文登整骨医院行气管切开机械通气的危重症患者155例,按照气管切开方式分为TST组45例、PDT组59例、MPDT组51例。TST组患者采用TST进行气管切开,PDT组患者采用PDT进行气管切开,MPDT组患者采用MPDT进行气管切开。比较3组患者手术情况、围术期并发症及术后1周并发症情况。结果 PDT组、MPDT组患者手术时间、切口直径、切口愈合时间均短于TST组,术中出血量均少于TST组(P0.05)。PDT组、MPDT组患者围术期及术后1周并发症发生率低于TST组(P<0.05);MPDT组患者围术期及术后1周并发症发生率低于PDT组(P<0.05)。结论 MPDT较TST能有效缩短手术时间及减少手术创伤,且较PDT并发症少。

关键词：气管切开术经皮扩张气管切开术疗效比较研究

Integrating lipidomics and gut microbiota to study the anti-hyperlipidemia effect of Sargentodoxae Caulis extract

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Traditional Medicine Research 2025年第1期10卷 1-11页

作者： Xiao-Xiao zhang Li Jia Xiu-Jun zhan Charity Ngina qing-Rui zhang Xiao-Ge Li Qi-Bao Jiang Shi Bai Miao-Miao Jiang National Key Laboratory of Chinese Medicine Modernization Tianjin University of Traditional Chinese MedicineTianjin 301617China Haihe Laboratory of Modern Chinese Medicine Tianjin 301617China School of Medicine Taizhou UniversityTaizhou 318000China.

Background:Sargentodoxae Caulis(SC)is the vine stem of Sargentodoxa Cuneata(Oliv.)Rehd.&*** in ***,and it in traditional Chinese medicine has been known for promoting blood circulation and removing blood stasis as recorded in the ancient book“Illustrated Classics of Materia Medica”.It has been used effectively to treat blood stasis too in modern clinical ***,the anti-hyperlipidemia effect of SC is not fully *** paper aims at exploring the use of SC stems to improve the balance of blood lipids in the body,and its new role in treating ***:The effects of SC extract on hyperlipidemia were explored by combining lipidomics and gut ***,we explored the potential mechanism of SC in treating hyperlipidemia by pathway ***:The results showed that the stem extract of SC could restore the physiological and biochemical indices of hyperlipidemia in mice,as well as repair the morphological and structural damage to *** to the Model group,the SC extract significantly reduced the liver index,epididymal fat index,and Lee’s *** also significantly decreased serum levels of total cholesterol,triglycerides,low-density lipoprotein cholesterol,peroxisome proliferator-activated receptor gamma(PPAR-γ),D-lactate,and free fatty acids,while significantly increasing the relative content of peroxisome proliferator-activated receptor alpha(PPAR-α).These changes were statistically ***-targeted lipidomics,based on LC-MS,were utilized to investigate the lipid metabolism characteristics in serum,liver,and epididymal fat of the *** was observed that,compared to the blank group,the Model group exhibited significant changes primarily in glycerol lipids and *** treatment group also displayed alterations in these lipids.A total of 38,81,and 27 differential lipids were identified in serum,liver,and epididymal fat samples,*** these,14 common differenti

关键词： hyperlipidemia Sargentodoxae Caulis lipidomics intestinal flora

DC-SIGN:Binding receptor for HCV?

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World Journal of Gastroenterology 2004年第7期10卷 925-929页

作者： Zhi-HuaFeng quan-ChuWang qing-HeNie zhan-ShengJia Yong-XinZhou TheCentero-fDiagnosisandTreatment-forInfectiousDiseasesofPLA TangduHospitalFourthMilitaryMedicalUniversityXi'an710038ShaanxiProvinceChina TheCentero-fDiagnosisandTreatment-forInfectiousDiseasesofPLA TangduHospitalFourthMilitaryMedicalUniversityXi'an710038ShaanxiProvinceChina

DC-SIGN, a dendritic Cell-specific adhesion receptor and a type Ⅱ transmembrane mannose-binding C-type lectin, is very important in the function of DC, both in mediating naive T cell interactions through ICAM-3 and as a rolling receptor that mediates the DC-specific ICAM-2-dependent migration processes. It can be used by viral and bacterial pathogens including Human Immunodeficiency Virus (HIV), HCV, Ebola Virus, CMV and Mycobacterium tuberculosis to facilitate infection. Both DC-SIGN and DC-SIGNR can act either in cis, by concentrating virus on target cells, or in bans, by transmission of bound virus to a target cell expressing appropropriate entry receptors. Recent work showed that DC-SIGN are highaffinity binding receptors for HCV. Besides playing a role in entry into DC, HCV E2 interaction with DC-SIGN might also be detrimental for the interaction of DC with T cells during antigen presentation. The clinical strategies that target DCSIGN may be successful in restricting HCV dissemination and pathogenesis as well as directing the migration of DCs to manipulate appropriate immune responses in autoimmunity and tumorigenic situations.

关键词： DC-SIGN 丙型肝炎病毒细胞粘附受体树突状细胞 T细胞免疫应答

Rice Grain Damage by Combination and Sequence Infestations by the Rice Leaffolder, Cnaphalocrocis medinalis Guenee(Lepidoptera: Pyralidae), and the White-Backed Rice Planthopper, Sogatella furcifera Horváth(Hemiptera: Delphacidae)

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Journal of Integrative Agriculture 2014年第11期13卷 2460-2470页

作者： JIANG Li-ben ZHU zhan-fei GE Lin-quan YANG Guo-qing WU Jin-cai School of Plant Protection Yangzhou University

The rice leaffolder （RLF）, Cnaphalocrocis medinalis Guenée （Lepidoptera：Pyralidae）, and the white-backed rice planthopper （WBPH）, Sogatella furcifera Horváth （Hemiptera： Delphacidae）, are major insect pests in China and several other Asian countries. These two pests commonly occur simultaneously or in a temporal sequence. Thus, the investigation of the effect of complex infestations or temporal sequence infestations by these pests on rice yield has a practical signiifcance for the control of these pests. The present study comprised experiments with the following four different variables in potted rice at the tillering stage：single pest species infestation, complex infestation, complete combination infestation and temporal sequence infestation （C. medinalis infestation prior to S. furcifera and S. furcifera infestation prior to C. medinalis）. The results showed that the four infestations resulted in a signiifcant decrease in 1 000-grain weight （1 000GW） and rate of yield loss （RYL） but an increase in blighted grain rate （BGR）, with a signiifcant positive correlation with the infestation density. However, the inlfuences of the complex infestation, complete combination infestation or sequence infestation on the 1 000GW, BGR and RYL were greater than those of the single pest species infestations but did not have addition effects, i.e., the effects of the complex infestation and combination infestation or sequence infestation on the 1 000GW, BGR and RYL were less than the additive effects of the two single pest species infestations at the same densities. In the condition of the same total infestation pressure, no signiifcant differences in the 1 000GW, BGR and RYL were found between C. medinalis infestation prior to S. furcifera and S. furcifera infestation prior to C. medinalis as well as between the sequence infestation and the complex infestation.

关键词： Cnaphalocrocis medinalis Sogatella furcifera complex infestation temporal sequence infestation rice yield loss

Prediction of temperature field in machined workpiece surface during the cutting of Inconel 718 coated with surface-active media

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Advances in Manufacturing 2023年第3期11卷 378-389页

作者： qing-An Yin zhan-Qiang Liu Bing Wang School of Mechanical Engineering Shandong UniversityJinan 250061People's Republic of China Key National Demonstration Center for Experimental Mechanical Engineering Education/Key Laboratory of High Efficiency and Clean Mechanical Manufacture of MQE Jinan 250061People's Republic of China

The heat generated and accumulated on the machined surface of an Inconel 718 workpiece causes thermal damage during the cutting ***-active media with high thermal conductivity coated on the workpiece to be machined may have the potential to reduce the generation of cutting *** this study,a theoretical model for predicting the instantaneous machined surface temperature field is proposed for surface-active thermal conductive medium(SACM)-assisted cutting based on the finite element and Fourier heat transfer *** cutting experiments were performed to verify the results predicted using the proposed surface-temperature field *** SACMs with various thermal conductivities were used to coat Inconel 718 surface to be *** embedded into the workpiece were used to measure the cutting temperature at different points on the machined workpiece surface during the cutting *** experimental results were in agreement with the predicted temperatures,and the maximum error between the experimental results and predicted temperatures was approximately 9.5%.The cutting temperature on the machined surface decreased with an increase in the thermal conductivity of the *** graphene SACM with high thermal conductivity can effectively reduce the temperature from 542℃ to 402℃,which corresponds to a reduction of approximately 26%.The temperature reduction due to SACM decreases with an increase in the distance between the temperature prediction point and machined workpiece *** conclusion,the cutting temperatures on the machined workpiece surface can be reduced by coating with SACM.

关键词： Surface-active thermal conductive media(SACM) Finite element model Cutting heat Cutting temperature Inconel 718