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Effect of selective laser treatment on initiation of fatigue crack in the main part of an undercarriage drag strut
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作者 Anna BIEN Marek SZKODO +1 位作者 Jerzy DOBERSKI Bartlomiej KARPINSKI 《中国航空学报:英文版》 SCIE EI CAS CSCD 2019年第3期701-714,共14页
This paper presents the results of material characterization and a fatigue test conducted for a laser-re-melted drag strut used in an aircraft landing gear. The drag strut was re-melted with a CO2 laser beam. Eight re... This paper presents the results of material characterization and a fatigue test conducted for a laser-re-melted drag strut used in an aircraft landing gear. The drag strut was re-melted with a CO2 laser beam. Eight re-melted paths were made in the form of spiral lines along the axis of the drag strut. Next, the drag strut was subjected to variable loads on a testing machine simulating loads occurring when an aircraft lands. The fatigue test showed that the laser-treated drag strut was able to withstand 1700 simulated cycles of landing. This result was 70% better than that obtained for a drag strut with no laser treatment. In order to find the reason for the increase in the number of cycles of simulated landings, tests were carried out using transmission and scanning electron microscopes, a computer microtomograph, an X-ray diffractometer, and a nanoindenter,respectively. Results of the conducted research indicated that the reasons for the increased fatigue life of the laser-treated undercarriage drag strut were both an ultra-fine cellular martensitic microstructure and compressing residual stresses generated during the laser re-melting of the surface layer of the material. 展开更多
关键词 Fatigue WEAR Laser re-melting NANOINDENTATION testing RESIDUAL stresses Steel alloy
自身免疫起源的迟发性癫痫流行率和临床结局:一项前瞻性观察性人群队列研究
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作者 Felix von Podewils Marie Suesse +12 位作者 Julia Geithner 张颖颖(译) 童馨(审) 慕洁(审) Gaida B Wang ZI Lange J Dressel A Grothe M Kessler C Langner S Runge U Bien CG 《癫痫杂志》 2018年第3期242-248,共7页
众所周知,随着年龄增长新发癫痫的发病率增加。通常,这些患者的病因难以明确。研究调查了有非诱导性迟发性癫痫发作且不合并肿瘤(可能患有副肿瘤性脑炎)患者的潜在自身免疫反应情况。在4.75年内前瞻性连续纳入了66例患者(至少有一次... 众所周知,随着年龄增长新发癫痫的发病率增加。通常,这些患者的病因难以明确。研究调查了有非诱导性迟发性癫痫发作且不合并肿瘤(可能患有副肿瘤性脑炎)患者的潜在自身免疫反应情况。在4.75年内前瞻性连续纳入了66例患者(至少有一次癫痫或癫痫发作,病程≤6个月,36例女性,年龄≥55岁)。检测所有患者的血清、脑脊液抗体和神经细胞表面、细胞内抗原。45例患者(68%)进行了核磁共振(MRI)检查。对于抗体阳性的患者随访时间至少6个月。2例患者血清、脑脊液中抗接触蛋白相关性蛋白样-2(Contactin associated protein-like 2,CASPR2)抗体滴度高,符合明确边缘性脑炎的诊断标准。另外2例患者MRI显示双侧脑颞区炎性异常,尽管血清、脑脊液抗体阴性,也符合明确边缘性脑炎的诊断标准。这4例患者年龄55~70岁之间,均接受了抗免疫治疗和(或)抗癫痫治疗之后变成癫痫再无发作。该研究发现提示自身免疫应该被认为是迟发型癫痫患者的一个重要病因。对于这些患者,神经元抗体检测和大脑MRI可能是有价值的检查手段。 展开更多
关键词 自身免疫性病因 迟发型癫痫 神经元抗体
Quantifying the impact of inhalational burns:a prospective study
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作者 Si Jack Chong Yee Onn Kok +3 位作者 Rosanna Xiang Ying Tay Desai Suneel Ramesh Kok Chai Tan Bien Keem Tan 《烧伤与创伤》 2018年第3期209-218,共10页
Background:Inhalational injury is a major cause of morbidity and mortality in burns patients. This study aims to analyse the clinical outcomes, complications and bacteriology of inhalational burn patients. Methods:A p... Background:Inhalational injury is a major cause of morbidity and mortality in burns patients. This study aims to analyse the clinical outcomes, complications and bacteriology of inhalational burn patients. Methods:A prospective study was done on consecutive admissions to Burn Department, Singapore General Hospital over 15 months from January 2015 to March 2016. Presence of inhalational injury, demographics, complications and outcomes was recorded. Diagnosis of inhalational injury was based on history, symptoms and nasoendoscopy. Diagnosis of acute respiratory distress syndrome (ARDS), acute kidney injury (AKI) and infective complications were according to the Berlin criteria, acute kidney injury network (AKIN) classification stage 2 and above and the American Burns Association guidelines. Results:Thirty-five patients (17.3%) had inhalational burns out of 202 patients (63.4%male, 57.4%Chinese population). The average age was 43 ± 16.7 years (range 16–86), and percentage of total body surface area (%TBSA) was 12.1 ± 18.0 (range 0–88). In patients with inhalational injury, age was 38.9 ± 17.2 years and%TBSA was 30.3 ± 32.3. In patients without inhalational injury, age was 44.1 ± 12.8 years and%TBSA was 8.3 ± 9.59. Compared to patients with cutaneous injury alone, patients with inhalational burns had more surgeries (3 ± 7.07 vs 1 ± 1.54, p=0.003), increased length of stay (21 days vs 8 days, p=0.004) and higher in-hospital mortality rate (17.1%vs 0.6%, p<0.001). Incidence of ARDS and AKI was 48.6%and 37.1%, respectively, compared to 0.6%and 1.2%in the patients without inhalational injury (p<0.001). Patients with inhalational injury had increased incidence of bacteraemia (31.4%vs 2.4%, p<0.001), pneumonia (37.1% vs 1.2%, p<0.001) and burn wound infection (51.4% vs 25.1%, p=0.004). Inhalational injury predicted AKI with an adjusted odds ratio (OR) of 17.43 (95%confidence interval (CI) 3.07–98.87, p<0.001);ARDS, OR=106.71 (95%CI 12.73–894.53, p<0.001) and pneumonia, OR=13.87 (95%CI 2.32–82.94, p=0.004) 展开更多
关键词 INHALATIONAL BURNS INJURY ACUTE kidney INJURY ACUTE respiratory DISTRESS syndrome PNEUMONIA
Study of the production of ∧0/b and -B/0 hadrons in pp collisions and first measurement of the ∧0/b→ J/ψ pK- branching fraction
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作者 R. Aaij B. Adeva +127 位作者 M. Adinolfi A. Affolder Z. Ajaltouni S. Akar J. Albrecht F. Alessio M. Alexander S. Ali G. Alkhazov P. Alvarez Cartelle A.A. Alves Jr S. Amato S. Amerio Y. Amhis L. An L. Anderlini J. Anderson G. Andreassi M. Andreotti J.E. Andrews R.B. Appleby O. Aquines Gutierrez F. Archilli1 P. d'Argent A. Artamonov M. Artuso E. Aslanides G. Auriemma M. Baalouch S. Bachmann J.J. Back A. Badalov C. Baesso W. Baldini R.J. B arlow C. Barschel S. Barsuk W. Barter V. Batozskaya V. Battista A. Bay L.Beaucourt J. Beddow F. Bedeschi I. Bediaga L.J. Bel V. Bellee N. Belloli I. Belyaev E. Ben-Haim G. Bencivenni S. Benson J. Benton A. Berezhnoy R. Bernet A. Bertolin M.-O. Bettler M. van Beuzekom A. Bien S. Bifani P. Billoir T. Bird A. Birnkraut A. Bizzeti T. Blake F. Blanc J. Blouw S. Blusk V. Bocci A. Bondar N. Bondar W. Bonivento S. Borghi M. Borsato T.J.V. Bowcock E. Bowen C. Bozzi S. Braun M.Britsch T. Britton J. Brodzicka N.H. Brook E. Buchanan A. Bursche J. Buytaert S. Cadeddu R. Calabrese M. Calvi M. Calvo Gomez P. Campana D. Campora Perez L. Capriotti1 A. Carbone G. Carboni R. cardinale A. Cardini P. Carniti L. Carson K. Carvalho Akiba G. Casse L. Cassina L. Castillo Garcia M. Cattaneo Ch. Cauet G. Cavallero R. Cenci M. Charles Ph. Charpentier M. Chefdeville S. Chen S.-F. Cheung N. Chiapolini M. Chrzaszcz X. Cid Vidal G. Ciezarek P.E.L. Clarke M. Clemencic H.V. Cliff J. Closier V. Coco J. Cogan E. Cogneras V. Cogoni L. Cojocariu G. Collazuol P. Collins A. Comerma-Montells A. Co 《中国物理C:英文版》 SCIE CAS CSCD 2016年第1期1-16,共16页
The product of the A_b~0(B~0) differential production cross-section and the branching fraction of the decay A_b~0→J/ψpK~-(B~0→J/ψK~*(892)~0) is measured as a function of the beauty hadron transverse momentum,p_T,a... The product of the A_b~0(B~0) differential production cross-section and the branching fraction of the decay A_b~0→J/ψpK~-(B~0→J/ψK~*(892)~0) is measured as a function of the beauty hadron transverse momentum,p_T,and rapidity,y.The kinematic region of the measurements is p_T <20 GeV/c and 2.0<y<4.5.The measurements use a data sample corresponding to an integrated luminosity of 3fb~(-1) collected by the LHCb detector in pp collisions at centre-of-mass energies s~(1/2)=7 TeV in 2011 and s~(1/2)= 8TeV in 2012.Based on previous LHCb results of the fragmentation fraction ratio,f_∧_b~0/f_d,the branching fraction of the decay ∧_b~0→J/ψpK~- is measured to be B(∧_b~0→J/ψpK~-)=(3.17±0.04±0.07±0.34_(-0.28)~(+0.45)×10~(-4)where the first uncertainty is statistical,the second is systematic,the third is due to the uncertainty on the branching fraction of the decay B~0→J/ψK~*(892)~0,and the fourth is due to the knowledge of f_∧_b~0/f_d.The sum of the asymmetries in the production and decay between A_b and A_b~0 is also measured as a function of p_T and y.The previously published branching fraction of A_b~0→J/φpπ~-,relative to that of A_b~0→J/ψpK~-,is updated.The branching fractions of∧_b~0→P_c~+(→J/ψp)K~- are determined. 展开更多
关键词 一次测量 分数 pp 强子 生产 不确定性 分支比 产生截面
Discrete-frequency Convergence of Iterative Learning Control for Linear Time-invariant systems with Higher-order Relative Degree
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作者 Xiao-E Ruan Zh ao-Zhen Li Z. Z. Bien 《国际自动化与计算杂志:英文版》 EI CSCD 2015年第3期281-288,共8页
In this paper, a discrete-frequency technique is developed for analyzing sufficiency and necessity of monotone convergence of a proportional higher-order-derivative iterative learning control scheme for a class of lin... In this paper, a discrete-frequency technique is developed for analyzing sufficiency and necessity of monotone convergence of a proportional higher-order-derivative iterative learning control scheme for a class of linear time-invariant systems with higher-order relative degree. The technique composes of two steps. The first step is to expand the iterative control signals, its driven outputs and the relevant signals as complex-form Fourier series and then to deduce the properties of the Fourier coefficients. The second step is to analyze the sufficiency and necessity of monotone convergence of the proposed proportional higher-order-derivative iterative learning control scheme by assessing the tracking errors in the forms of Paserval s energy modes. Numerical simulations are illustrated to exhibit the validity and the effectiveness. 展开更多
关键词 Iterative learning control MONOTONE CONVERGENCE DISCRETE FREQUENCY-DOMAIN spectrum Fourier series Parseval s energy EQUALITY rel
超交联微孔聚合物研究进展 被引量:5
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作者 谭良骁 谭必恩 《化学学报》 SCIE CAS CSCD 北大核心 2015年第6期530-540,共11页
超交联微孔聚合物是一类重要的多孔聚合物材料,由于其具有高比表面积、合成条件温和、单体来源广泛等优点而成为研究的热点.根据不同阶段合成方法的差异,超交联聚合物主要由以下三种方法制备得到:(1)含官能团聚合物前体的后交联;(2)功... 超交联微孔聚合物是一类重要的多孔聚合物材料,由于其具有高比表面积、合成条件温和、单体来源广泛等优点而成为研究的热点.根据不同阶段合成方法的差异,超交联聚合物主要由以下三种方法制备得到:(1)含官能团聚合物前体的后交联;(2)功能化小分子单体的一步法自缩聚;(3)通过外交联剂'编织'刚性的芳香族单体.本文介绍了超交联聚合物的发展过程,着重对三种合成超交联聚合物的方法、同时对微孔聚合物微观形貌的控制以及其在气体储存、分离、催化等方面的应用进行了总结.最后提出了超交联聚合物的缺陷和所面临的挑战,并对未来超交联微孔聚合物的发展前景进行了展望,指明了超交联聚合物发展的新方向. 展开更多
关键词 微孔 超交联聚合物 后交联 自缩合 外交联
论卢卡奇对文化及经济优先性的理解——技术时代的人、经济与文化 预览
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作者 约瑟夫·宾(Joseph Bien 林建成(译) 《洛阳师范学院学报》 2010年第4期 26-28,共3页
对技术时代的人、经济与文化的关系,卢卡奇认为经济的优先性既是人的物化的表现,也是文化被扭曲的表现,但它仅限于阶级社会。经济统治的终结是真正文化产生的必要前提。真正的文化是把反映人的自由活动作为自身目的的文化,这样的文... 对技术时代的人、经济与文化的关系,卢卡奇认为经济的优先性既是人的物化的表现,也是文化被扭曲的表现,但它仅限于阶级社会。经济统治的终结是真正文化产生的必要前提。真正的文化是把反映人的自由活动作为自身目的的文化,这样的文化对社会的经济基础保持着自己的自由。 展开更多
关键词 文化 经济
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钢包冶金设备的实施 预览
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作者 Bien.,TH 陈卡尔 《国外钢铁》 1995年第1期 32-35,共4页
LTV钢铁公司在克利夫兰厂建起了一座钢包炉和真空循环脱气装置,用来生产超低碳和超低硫钢,钢包炉运行始于1991年6月,由于操作工实施了快束学习方案,炉次处理率迅速提高到100%的水平。
关键词 炉外精炼 钢包 精炼炉 真空脱气设备
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微电子组件的自动装配 预览
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作者 Bien,Z 钢付 《国外微计算机》 1992年第1期 35-40,共6页
关键词 微电子组件 装配
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用铝—石灰石混合的钢包渣脱氧 预览
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作者 Bien.,TB 徐长青 《钢铁译文集》 1992年第2期 51-54,共4页
关键词 钢水 铝-石灰石 钢包渣 脱氧
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LTV钢公司克利夫兰厂2^#氧气转炉的LD—KGC底吹搅拌工艺 预览
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作者 Bien.,TH 梁永安 《国外钢铁科技》 1991年第1期 90-97,共8页
关键词 氧气转炉 LD-KGC 底吹搅拌
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希望与不足:对作为隧道工程设计工具的岩体分类的评议
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作者 Bien.,ZT 徐光黎 《隧道译丛》 1990年第4期25-29,共5页
关键词 隧道工程 设计工具 岩体分类
用铝—石灰石混合料的钢包渣脱氧 预览
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作者 Bien.,TH 许刚 《国外钢铁》 1990年第10期 35-37,共3页
关键词 钢包渣 脱氧 石灰石 混合料
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钢水的铝—氧加热法 预览
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作者 Bien.,TH 许刚 《国外钢铁》 1990年第11期 30-34,共5页
关键词 钢水 铝-氧加热法 转炉 钢包炉
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降低铁水脱硫渣渣中带铁损失的方法 预览
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作者 Bien.,TH 赵兴武 《国外钢铁钒钛》 1990年第1期 6-11,共6页
关键词 铁水 脱硫渣 带铁 降低
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发热型钢水脱硫剂 预览
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作者 Bien.,TH 顾卫林 《国外钢铁科技》 1989年第1期 79-84,共6页
关键词 钢水 脱硫剂
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钢水放热脱硫
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作者 Bien.,TH 李荣春 《武钢技术》 CAS 1989年第4期 27-31,共5页
发明了一种成分为58%CaO、30%Fe·Fc_3O_4和11%Al的混合剂,可用来作为放热脱硫剂。在孜热反应中纯氧化物和Al化合,生成Fe和Al_2O_3。通过铝放热反应而产生的大量的热来帮助熔化CaO,形成铝酸钙渣。与现在钢铁工业大量采用CaO—Ca... 发明了一种成分为58%CaO、30%Fe·Fc_3O_4和11%Al的混合剂,可用来作为放热脱硫剂。在孜热反应中纯氧化物和Al化合,生成Fe和Al_2O_3。通过铝放热反应而产生的大量的热来帮助熔化CaO,形成铝酸钙渣。与现在钢铁工业大量采用CaO—CaF_2—Al脱硫剂一样,钢的脱硫率不仅与脱硫剂的加入量有关,而且与出钢时进入钢包里的含氧炉渣的量有关。然而,采用放热脱硫剂可对含硫异常高的钢水进行脱硫,而且钢水温度降低值不会大于不使用脱硫剂时的正常值。这与采用Ca0—CaF_2—Al脱硫剂大不相同,采用这种脱硫剂时,对铜水有很高的要求。 展开更多
关键词 钢水 放热脱硫
全文增补中
江南无所有,聊赠一枝春
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作者 Tout Ira Bien 《中学生博览》 2014年第15期31-31,共1页
下午吃麻辣烫的时候,欣欣偷偷给我和老向拍了一张照片,并迅速上传于扣扣、微信,然后来@我们。这是近来我们最喜欢玩的@对方。虽然,我总是大喊不要再互@对方了啦,好丢人,或者大喊照片好丑哦,删了删了。可是,在那个时候,我的内... 下午吃麻辣烫的时候,欣欣偷偷给我和老向拍了一张照片,并迅速上传于扣扣、微信,然后来@我们。这是近来我们最喜欢玩的@对方。虽然,我总是大喊不要再互@对方了啦,好丢人,或者大喊照片好丑哦,删了删了。可是,在那个时候,我的内心总充满温暖和快乐的。 展开更多
关键词 江南 照片 对方
Friction characteristics of mechanically exfoliated and CVD-grown single-layer MoS2
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作者 Dinh Le Cao KY Bien-Cuong TRAN KHAC +2 位作者 Chinh Tam LE Yong Soo KIM Koo-Hyun CHUNG 《摩擦(英文版)》 2018年第4期395-406,共12页
关键词 化学气相沉积 摩擦性能 摩擦学 机械剥离法
Morphology design of microporous organic polymers and their potential applications: an overview
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作者 Li, Qingyin Razzaque, Shumaila +1 位作者 Jin, Shangbin Tan, Bien 《中国科学:化学英文版》 SCIE EI CAS CSCD 2017年第8期1056-1066,共11页
Microporous organic polymers(MOPs) have attracted considerable research interest because of their well-defined porosity,high surface area, lightweight nature, and tunable surface chemistry. The morphology of MOPs are ... Microporous organic polymers(MOPs) have attracted considerable research interest because of their well-defined porosity,high surface area, lightweight nature, and tunable surface chemistry. The morphology of MOPs are demonstrated to play a significant role in various applications although limited examples manifesting the importance of the MOP morphology in numerous applications have been reported. This review summarizes the recent progress in the design of MOPs using different techniques, including hard and soft template and direct synthesis methods. In addition, their applications, which possibly attribute to their shape, are discussed. Furthermore, the advantages and disadvantages of different methods are discussed, as well as their development and future challenges. 展开更多
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