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上下平砧锻造过程中孔洞闭合的研究

大型铸锻件 1988年第4期 52-58页

作者： m.tanaka S.Ono m.tsuneno t.Iwadate 王海荣

通过镦粗内部带孔的圆柱体,并进行有限元法分析,可见等效应变与静水压力是控制孔洞闭合的两个主要因素。中心带孔圆棒料平砧间拔长的内部孔洞闭合的应力、应变,又受到砧宽、压下量,变形硬化系数的影响。本文分析方法用三维有限单元法作... 详细信息

通过镦粗内部带孔的圆柱体,并进行有限元法分析,可见等效应变与静水压力是控制孔洞闭合的两个主要因素。中心带孔圆棒料平砧间拔长的内部孔洞闭合的应力、应变,又受到砧宽、压下量,变形硬化系数的影响。本文分析方法用三维有限单元法作为钢锭开始的模型。通过三维分析,我们得到了闭合孔洞所需砧宽比与压下量的合理组合。

关键词：孔洞闭合平砧三维有限单元法锻造有限元法分析等效应变静水压力硬化系数

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LSD1 is required for euchromatic origin firing and replication timing

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Signal transduction and targeted therapy 2022年第5期7卷 1703-1718页

作者： Yue Wang Yunchao Huang Edith Cheng Xinhua Liu Yu Zhang Jianguo Yang Jordan t.F.Young Grant W.Brown Xiaohan Yang Yongfeng Shang Department of Biochemistry and molecular Biology School of Basic Medical SciencesPeking University Health Science CenterBeijing 100191China Department of Biochemistry and molecular Biology School of Basic Medical SciencesHangzhou Normal UniversityHangzhou 311121China Department of Biochemistry and molecular Biology School of Basic Medical SciencesCapital Medical UniversityBeijing 100069China Department of Biochemistry and Donnelly Centre University of TorontoTorontoON M5S 1A8Canada Lunenfeld-tanenbaum Research Institute Mount Sinai Hospital600 University Ave.TorontoON M5G 1×5Canada

the chromatin-based rule governing the selection and activation of replication origins remains to be *** is believed that DNA replication initiates from open chromatin domains;thus,replication origins reside in open and active ***,we report here that lysine-specific demethylase 1(LSD1),which biochemically catalyzes H3K4me1/2 demethylation favoring chromatin condensation,interacts with the DNA replication machinery in human *** find that LSD1 level peaks in early S phase.

关键词： origin LSD1 replication

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掺加大剂量粉煤灰与增塑剂的高强混凝土

公路工程 1986年第1期 61-67页

作者： P.K.mukherjee ,m.t.Loughborough ,V.m.malhotra ,孙浩然江西省公路局科研所

本文介绍了一种能替代普通波特兰水泥的、掺入增塑剂和大剂量粉煤灰的高强混凝土的研究成果。研制的混凝土混合料水/水泥+粉煤灰比率为0.28。水泥与粉煤灰的含量分别390和230kg/m3,并掺加了大剂量的增塑剂。152×305mm圆柱体的28天抗压... 详细信息

本文介绍了一种能替代普通波特兰水泥的、掺入增塑剂和大剂量粉煤灰的高强混凝土的研究成果。研制的混凝土混合料水/水泥+粉煤灰比率为0.28。水泥与粉煤灰的含量分别390和230kg/m3,并掺加了大剂量的增塑剂。152×305mm圆柱体的28天抗压强度达到51.0～53.8KPα、28天的抗弯强度大约为8KPα。它的干缩与徐变值和基准混合料的对应数值相似。已经发现、这种改进的混凝土具有良好的和易性和早期强度,并可以使用到高强度结构有件的预制混凝土施工中去。

关键词：粉煤灰粉尘波特兰水泥硅酸盐水泥混凝土无机非金属材料增塑剂防软剂塑料助剂混合料配合料烧结料棱柱体试件徐变试验力学性能试验掺加大剂量

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高温长丝纱

国际纺织导报 2016年第2期44卷 6-6,8-10页

作者： m.Dauner m.Hoss G.t.Gresser 钟晓慧纺织工艺研究所(德国)

常见纤维,如聚酯(PEt)和聚酰胺(PA 66),在200℃以上不能使用,并且在热气体过滤时容易水解。通常要求制备膜结构的纤维具有低蠕变、高强度和易清洁等性能。双组分纤维,如聚醚醚酮(PEEK)和含氟热塑性聚合物[全氟烷氧基聚合物(PFA)、氟化... 详细信息

常见纤维,如聚酯(PEt)和聚酰胺(PA 66),在200℃以上不能使用,并且在热气体过滤时容易水解。通常要求制备膜结构的纤维具有低蠕变、高强度和易清洁等性能。双组分纤维,如聚醚醚酮(PEEK)和含氟热塑性聚合物[全氟烷氧基聚合物(PFA)、氟化乙烯丙烯共聚物(FEP)及热塑性聚四氟乙烯(mPtFE)]能满足这些要求。因此在纺长丝工艺中要求热塑性聚合物的熔点高于300℃,而传统纺纱设计工艺不适合300℃以上的温度,也没有这种纯聚合物,且在较高的拉伸温度下纺丝油剂还易冒烟。含氟聚合物由于其单体容易形成氢氟酸,要求加工设备采用耐蚀、耐热镍基合金或铬镍铁合金制造,至今可以使用的设备只有纺丝泵。报告对这些问题给予了很大关注,并概述了目前的发展状况。

关键词：皮芯型双组分纤维含氟热塑性聚合物纺丝泵

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the Hyperbolic two temperature Semiconducting thermoelastic Waves by Laser Pulses

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Computers, materials & Continua 2021年第6期67卷 3601-3618页

作者： Ismail m.taye Kh.Lotfy A.A.El-Bary Jawdat Alebraheem Sadia Asad Department of mathematics College of Science Al-ZulfiMajmaah University11952Saudi Arabia Department of mathematics Faculty of ScienceZagazig UniversityZagazigEgyp t 3Arab Academy for Science Technology and Maritime TransportAlexandriaEgypt Department of mathematics Faculty of ScienceTaibah UniversityMadinahSaudi Arabia National Committee for mathematics Academy of Scientific Research and TechnologyCairoEgypt

A novel model of a hyperbolic two-temperature theory is investigated to study the propagation the thermoelastic waves on semiconductor *** governing equations are studied during the photo-excitation processes in the context of the photothermal *** outer surface of o semiconductor medium is illuminated by a laser *** generalized photo-thermoelasticity theory in two dimensions(2D)deformation is used in many models(Lord–Shulman(LS),Green–Lindsay(GL)and the classical dynamical coupled theory(CD)).the combinations processes between the hyperbolic two-temperature theory and photo-thermoelasticity theory under the effect of laser pulses are obtained *** harmonic wave technique is used to obtain the exact solutions of the main physical fields under *** mechanical,thermal and recombination plasma loads are applied at the free surface of the medium to obtain the complete solutions of the basic physical *** comparisons are made between the three thermoelastcity theories under the electrical effect of thermoelectric coupling *** influence of hyperbolic two-temperature,two-temperature and one temperature parameters on the distributions of wave propagation of physical fields for semiconductor silicon(Si)medium is shown graphically and discussed.

关键词： Photo-thermo-elasticity theory semiconductors laser pulses hyperbolic two temperature harmonic waves thermo-elastic waves

Contractile apparatus dysfunction early in the pathophysiology of diabetic cardiomyopathy

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World Journal of Diabetes 2015年第7期6卷 943-960页

作者： mark t Waddingham Amanda J Edgley Hirotsugu tsuchimochi Darren J Kelly mikiyasu Shirai James t Pearson Department of medicine St Vincent’s HospitalUniversity of Melbourne Department of Physiology Monash University Department of Cardiac Physiology National Cerebral and Cardiovascular Center Research Institute monash Biomedical Imaging Facility Monash University Australian Synchrotron

Diabetes mellitus significantly increases the risk of cardiovascular disease and heart failure in *** of hypertension and coronary artery disease,diabetes is associated with a specific cardiomyopathy,known as diabetic cardiomyopathy(DCm).Four decades of research in experimental animal models and advances in clinical imaging techniques suggest that DCm is a progressive disease,beginning early after the onset of type 1 and type 2 diabetes,ahead of left ventricular remodeling and overt diastolic *** the molecular pathogenesis of early DCm still remains largely unclear,activation of protein kinase C appears to be central in driving the oxidative stress dependent and independent pathways in the development of contractile *** subcellular alterations to the cardiomyocyte are now being highlighted as critical events in the early changes to the rate of force development,relaxation and stability under pathophysiological *** changes include perturbed calcium handling,suppressed activity of aerobic energy producing enzymes,altered transcriptional and posttranslational modification of membrane and sarcomeric cytoskeletal proteins,reduced actin-myosin cross-bridge cycling and dynamics,and changed myofilament calcium *** this review,we will present and discuss novel aspects of the molecular pathogenesis of early DCm,with a special focus on the sarcomeric contractile apparatus.

关键词： Diabetes Prediabetes Insulin resistance myocardium Sarcomere Protein kinase C Rho kinase

股骨头的软骨下不全骨折:相关影像表现和临床进展的预测指标

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国际医学放射学杂志 2016年第4期 463-464页

作者： L.A.Hackney m.H.Lee G.B.Joseph t.P.Vail t.m.Link 向佩 Department of Radiology and Biomedical Imaging University of California

摘要目的探究股骨头软骨下不全骨折(SIF)的影像特征,并探讨与临床结局相关的影像表现。方法 2名放射科医生记录了51例病人股骨/骨盆mRI的典型SIF表现。其中35例病人有随诊记录,用以评估其临床结局。小组间比较采用

关键词：不全骨折软骨缺损股骨头影像表现临床进展

Effects of low dose γ-ray irradiation on peripheral leukocyte counts and spleen of mice

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中华医学杂志(英文版) 1996年第3期109卷 214-214页

作者： I H Lin D m Hau W C Chen K t Chen Institute of Radiation Biology National Tsing-Hua University Hsinchu Taiwan.

OBJECtIVE to study the effects of low dose γ-ray irradiation on peripheral leukocyte counts and spleen weight of *** AND mEtHODS two hundred male mice of ICR strain were divided into four groups. Group A served as normal control. Groups B, C and D, the experimental groups were treated with 5, 50 and 100 cGy (exposure dose in air) of whole body γ-ray irradiation respectively. the leukocyte counts and its differential counts, body weight and the spleen weight of mice were measured on days 1, 5, 12, 19, 26 and 33 after irradiation. the relative spleen weight derived from the data of body weight and spleen weight was also calculated in tested *** the leukocytes and its differential counts and relative spleen weight in mice decreased after 100 cGy γ-ray irradiation. Fifty cGy γ-ray irradiation could inhibit the leukocyte and its differential counts. the lowest dose, 5 cGy had no considerable *** One hundred cGy of137Cs γ-ray irradiation had an inhibitory effect on counts of total leukocyte, lymphocyte, neutrophil, monocyte, spleen weight and body weight, while 50 cGy γ-ray irradiation had an evident inhibition on peripheral leukocytes and its differential counts in mice. However, 5 cGy γ-ray irradiation had no obvious inhibition in the tested mice in the period of the investigation.

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Uster mDtA3型的最佳纤维混合方法

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国际纺织导报 2004年第2期32卷 35-40页

作者： D．Das S．m．Ishtiague t．mac t．Gries 江慧李毓陵印度工业大学纺织系（印度）莱茵威斯特伐利亚大学亚琛纺织学院（德国）不详

评价了UstermDtA 3型设备最佳的纤维混合方法 ,以便用UstermDtA 3型设备加工的条子生产的转杯纱的性质可以和其他工业化生产的纱线比美。采用了五种不同的混合纤维的方法 ,以 5 0 /5 0的比例混合棉与粘胶纤维 ,并使用Optimas 6.2图像处... 详细信息

评价了UstermDtA 3型设备最佳的纤维混合方法 ,以便用UstermDtA 3型设备加工的条子生产的转杯纱的性质可以和其他工业化生产的纱线比美。采用了五种不同的混合纤维的方法 ,以 5 0 /5 0的比例混合棉与粘胶纤维 ,并使用Optimas 6.2图像处理软件来评价出最好的混合方法。研究了加工工序的道数对混合质量的影响。此外 ,通过性能对比 ,验证了用UstermDtA

关键词： Uster mDtA3型设备纤维混合方法转杯纱并条条子生产方法

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