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自然地形红外象相关长度

应用光学 1987年第4期 32-35页

作者： n.Ben-Yosef K.Wilner s.simhony M.Abitbol 边原

本文分析自然地形的热象空间结构。从热平衡方程可以看出,此结构与地形的热特性和外部辐射源的热输入有关。这表明地形热象的空间自相关是热传导率和热吸收率空间自相关函数的加权叠加。每一相对加权作为外部热源函数而变化,产生出随时... 详细信息

本文分析自然地形的热象空间结构。从热平衡方程可以看出,此结构与地形的热特性和外部辐射源的热输入有关。这表明地形热象的空间自相关是热传导率和热吸收率空间自相关函数的加权叠加。每一相对加权作为外部热源函数而变化,产生出随时间变化的自相关的函数。实验结果表明,这与理论假设相当吻合,并证明了热象的相关长度是随热源强度的增加而减小的。

关键词：相关长度空间特性自相关函数热平衡方程自然地形时间变化空间变量空间单元辐照度热象红外

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世界核心医学期刊文摘（神经病学分册） 2005年第8期1卷 10-11页

作者： scolding n.J. Joseph F. Kirby P.A. s. Love 郭俊 Department of neuropathology Institute of Clinical NeurosciencesFrenchay Hospital Bristol BS16 1LE United Kingdom Dr.

Idiopathic or primary angiitis of the Cns (PACns) and cerebral amyloid angiopa thy (CAA) are unusual vasculopathies generally regarded as unrelated disorders. A few case reports have,however, described granulomatous angiitis in patients wi th sporadic,amyloid βpeptide (Aβ)-related CAA. Here we describe the clinical, neuroradiological and neuropathological features of nine patients with Aβ-rel ated angiitis (ABRA). Combining these with the individual case reports drawn fro m the literature has allowed us to define ABRA as a clinical entity and to compa re its features with those of PACns. The mean age of pres.n.ation of ABRA (67 ye ars) is higher than that of PACns but lower than that of sporadic non-inflammat ory Aβ-related *** in mental status (59%), headaches (35%), seiz ures and focal neurological deficits (24%) are common. Hallucinations are a pre s.n.ing manifestation in 12 %of cases. Most patients have white matter hyperint ensities on MRI but these are of similar appearance to those in PACns. Cerebrosp inal fluid usually shows modest elevation of protein and *** ogy reveals angiodestructive inflammation,often granulomatous, and meningeal lym phocytosis. Aβis consistently pres.n. in abundance in affected blood vessels bu t usually scanty within the parenchyma of the cerebral ***, the corte x includes.n.merous activated microglia,occasionally in a plaque-like distribut ion and containing cytoplasmic Aβ. The cerebral white matter shows patchy glios is and rarefaction, in some cases marked. Our findings (i) help to dissect one s eparate clinicopathological entity from what is likely to be a spectrum of prima ry angiitides of the Cns;(ii) have important therapeutic implications for one ca tegory of patients with amyloid-related vasculopathy; and (iii) may provide val uable insights into the development of amyloid-associated inflammation, of rele vance not only to ABRA but also to Aβ-immunization-related encephalitis and t

关键词： β淀粉样蛋白淀粉样中枢神经系统神经病理阿尔茨海默病血管炎小胶质细胞胶质增生淋巴细胞增多受累血管

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喜玛拉雅山的挑战

国际水力发电 1997年第9期49卷 45-49页

作者： B·n·阿斯阿纳 s·C·吉里杨凡郭培树

有限元分析法可以为在喜玛拉雅山复杂的地质条件下设计大坝提供解决问题的答案。

关键词：喜玛拉雅山有限元分析法大坝设计亚穆纳河地质条件

Improved stability of a compact vacuum-free laser-plasma X-ray source

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High Power Laser science and Engineering 2020年第2期8卷 62-70页

作者： L.Martín J.Benlliure D.Cortina-Gil J.Penas C.Ruiz IGFAE Universidade de Santiago de Compostela15782 Santiago de CompostelaSpain Instituto Universitario de Física Fundamental y Matematicas y Dpto.de Didáctica de la Matemática y de las Ciencias Experimentales Universidad de SalamancaPatio de Escuelas s/nSalamancaSpain

We report the development of a stable high-average power X-ray source generated by the interaction of ultrashort laser pulses(35 fs,1 mJ,1 kHz)with a solid target in *** achieved source stability,which is ess.n.ial for the applications foreseen for these laser-driven plasma accelerators,is due to the combination of precise positioning of the target on focus and the development of a fast rotating target system able to ensure the refreshment of the material at every shot while minimizing positioning errors with respect to the focal *** vacuum-free laser-plasma X-ray source provides an average dose rate of 1.5 sv/h at 30 cm and a repeatability better than 93%during more than 36 min of continuous operation per target.

关键词： X-rays laser-plasma vacuum-free environment source stability

Effect of surface mechanical attrition treatment of titanium us.n. alumina balls： surface roughness, contact angle and apatite forming ability

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Frontiers of Materials science 2013年第3期7卷 285-294页

作者： M. JAMEsH T. s. n. s.n.ARA nARAYAnAn Paul K. CHU II s.n. PARK Min Ho LEE national Metallurgical Laboratory Madras Centre CSIR Madras Complex Taramani Chennai 600 113 India Department of Physics and Material science City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong China school of Physics University of Sydney NSW 2006 Australia Department of Dental Biomaterials School of Dentistry Chonbuk National University Jeonju 561-756 South Korea

The effect of surface mechanical attrition treatment （sMAT） of commercially pure titanium （CP-Ti） us.n. 8 mm O alumina balls was studied. sMAT induced plastic deformation, increased the surface roughness, reduced the grain size and decreased the contact angle （from 64° to 43°） with a corresponding increase in surface energy （from 32 to 53 mJ/m2）. Untreated CP-Ti and those treateded us.n. alumina bails for 900 s reveals.n. apatite growth until the 28th day of immersion whereas those treated for 1800 and 2700 s exhibit apatite growth In selective areas and the extent of growth is increased with increase in immersion time an sBF; The study reveals that sMAT us.n. alumina balls is beneficial in imparting the desired surface Cheracteristics, provided the surface contamination is limited, which would otherwise decrease the apatite forming ability.

关键词： KEYWORDs: nanostructured material surface modification sca.ning electron micro-scopy (sEM) surface mechanical attrition treatment(sMAT)

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黑云杉爆破法制浆

国外造纸 1990年第4期9卷 11-14页

作者： K.n.Law s.L.Bi 梁温邦杜荣荣

爆破法制浆或汽相蒸煮爆破放料并不是一个新的概念.事实上,Mas.n.te法在半个多世纪以前就已产生,只不过那时仅用于制造硬纸板。这种制浆方法使用高达70公斤/厘米~2的汽压,爆破高度软化的木片以生产粗浆。此后,爆破概念应用于制浆造纸... 详细信息

爆破法制浆或汽相蒸煮爆破放料并不是一个新的概念.事实上,Mas.n.te法在半个多世纪以前就已产生,只不过那时仅用于制造硬纸板。这种制浆方法使用高达70公斤/厘米~2的汽压,爆破高度软化的木片以生产粗浆。此后,爆破概念应用于制浆造纸和处理废纸。用除水以外的化学药品塑化纤维原料。虽然。

关键词：黑云杉爆破法制浆

随机对照试验:持续性腹泻时在碎鸡肉末饮食中添加部分水解的瓜尔豆树胶

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世界核心医学期刊文摘（儿科学分册） 2005年第6期1卷 16-17页

作者： Alam n. H. Meier R. sarker s. A. 郭战宏 Clinical sciences Division Intl. Ctr. for Diarrhoeal Dis. Res. GPO Box 128 Dhaka 1000 Bangladesh Dr.

Background: Partially hydrolysed guar gum (Benefiber) added to a diet is fermented in the colon, producing short chain fatly acids, which improve intestinal function, including colonic salt and water absorption. Aims: To evaluate the effect of Bene-fiber supplemented comminuted chicken diet in the treatment of persistent diarrhoea. Methods: One hundred and sixteen children (aged 5-24 months), pres.n.ing to Dhaka Hospital with a history of watery diarrhoea for more than 14 days (persistent diarrhoea), were randomised to receive either (1) comminuted chicken diet with Benefiber (study diet); or (2) comminuted chicken diet without Benefiber (control diet). The study period was seven days. Results: Of 116 children, 57 received the study diet and 59 received the control diet. Diarrhoea resolved in a greater number of children with the study than with the control diet (46/55 (84%) v 36/58 (62%); odds ratio 3.12, 95%CI 1.19 to 8.4). survival analysis for the duration of diarrhoea also showed a reduced duration of diarrhoea in children receiving the study diet. There was also a trend in daily stool reduction in children receiving the study diet, significant on days 4-7. Conclusion: Results show that Benefiber supplemented comminuted chicken diet enhances recovery of children with persistent diarrhoea, indicating its therapeutic potential.

关键词：持续性腹泻随机对照试验部分水解瓜尔豆水样腹泻腹泻病短链脂肪酸商品名腹泻患儿接受研究

卒中对行走时头部自主水平运动过程中头部、胸廓和骨盆的协调性及稳定性的影响

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世界核心医学期刊文摘（神经病学分册） 2005年第7期1卷 12-13页

作者： Lamontagne A. De serres s.J. Fung J. Paquet n. 夏峰 sch. of Phys. and Occup. Therapy McGill University 3654 Prome nade Sir-William-Osler MontrealQue. H3G1Y5 Canada

Objective: This study was conducted to investigate and compare the coordinatio n and stabilization of axial segments during walking with and without horizontal voluntary head turns, in healthy (n=5) and hemiparetic (n=10) subjects. Methods : subjects were instructed to turn the head as fast and as soon as possible in t he direction indicated by an illuminated arrow signal(right, left or none) that was triggered at initial contact of the right (healthy) or paretic (hemiparetic) foot. Head, thorax,and pelvis motions were obtained from a 9-segment model usi ng retro-reflective markers and a Vicon-512 system with 6 high-resolution cam eras. Coordination of axial segments in the horizontal plane was characterized u s.n. cyclographs and cross-correlat- ion analyses. stabilization of the segments was quantified us.n. root mean squ are (RMs) values of the segment’s.n.rmalized acceleration profile. Results: The healthy subjects showed a direction-dependent modulation of axial segment coor dination, with head turns toward and away from the stance limb favoring and hind ering, respectively, the contrarotational pattern of the thorax with respect to the pelvis during locomotion. Meanwhile, pelvis motions remained *** direction-specific modulation pattern was disrupted in the hemiparetic subjects , both in the spatial and temporal ***, larger RMs values for head and thorax segments were observed in the hemiparetic groups, both with and witho ut the superimposition of voluntary head motions. Conclusions:The findings sugge st that: (1) head rotations during walking modify axial segment coordination in a direction-specific manner, (2) the pelvic rotations associated with locomotio n remained unaffected by head rotations and (3) stroke alters this coordination behavior, which may contribute to balance dysfunctions during locomotion.

关键词：水平运动轻偏瘫 normalized thorax voluntary locomotion axial 轻瘫健康受试者计算机模拟

基于酶促信号放大的氧化石墨烯生物传感器快速检测金黄色葡萄球菌的研究

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长沙医学院学报 2019年第3期 3-9页

作者：贺气志唐亮周吉陈珂珂陈伶利宁毅长沙医学院基础医学院湖南长沙410219 湖南中医药大学医学院湖南长沙410208

本研究以设计的与16srRnA互补的单链DnA(ss.n.)探针作为捕捉探针,羧基荧光素(FAM)标记的探针1、探针2作为信号探针,将两者组装形成两个FAM标记的探针(TFP),并以氧化石墨烯(GO)作为猝灭剂形成TFP/GO复合物。当无靶标时,TFP吸附到GO表面,... 详细信息

本研究以设计的与16srRnA互补的单链DnA(ss.n.)探针作为捕捉探针,羧基荧光素(FAM)标记的探针1、探针2作为信号探针,将两者组装形成两个FAM标记的探针(TFP),并以氧化石墨烯(GO)作为猝灭剂形成TFP/GO复合物。当无靶标时,TFP吸附到GO表面,FAM的荧光被猝灭,当加入靶标后,TFP从GO上解离下来,荧光恢复,因此可以通过荧光值定量检测靶标。此外,在体系中加入脱氧核糖核酸酶I(DnaseI),TFP被降解从而释放出靶标RnA用于下一轮反应同时产生大量的FAM,可以极大地提高该传感器的灵敏度及特异性。结果表明该方法对靶标RnA的检测限可达0.3nmol/L,且在1~60nmol/L范围内呈良好的线性关系(R^2=0.9984);对靶标菌的检测限低至50CFU/mL,且在10~2~10~7CFU/mL范围内呈良好的线性关系(R^2=0.9973)。该方法对靶标茵检测的信噪比要远大于非靶标菌,表明其具有很强的特异性。该研究建立的快速检测金黄色葡萄球菌的纳米生物传感器具有良好的定量能力和操作性能,且灵敏度高、特异性强。

关键词：金黄色葡萄球菌 16s rRnA 氧化石墨烯脱氧核糖核酸酶Ⅰ