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| 1 | Predictors of mortality after transjugular portosystemic shunt显示文摘AIM:To investigate if echocardiographic and hemodynamic determinations obtained at the time of transjugular intrahepatic portosystemic shunt(TIPS)can provide prognostic information that will enhance risk stratification of patients.METHODS:We reviewed medical records of 467 patients who underwent TIPS between July 2003 and December 2011 at our institution.We recorded information regarding patient demographics,underlying liver disease,indication for TIPS,baseline laboratory values,hemodynamic determinations at the time of TIPS,and echocardiographic measurements both before and after TIPS.We recorded patient comorbidities that may affect hemodynamic and echocardiographic determinations.We also calculated Model for Endstage Liver Disease(MELD)score and Child Turcotte Pugh(CTP)class.The following pre-and post-TIPS echocardiographic determinations were recorded:Left ventricular ejection fraction,right ventricular(RV)systolic pressure,subjective RV dilation,and subjective RV function.We recorded the following hemodynamic measurements:Right atrial(RA)pressure before and after TIPS,inferior vena cava pressure before and after TIPS,free hepatic vein pressure,portal vein pressure before and after TIPS,and hepatic venous pressure gradient(HVPG).RESULTS:We reviewed 418 patients with portal hypertension undergoing TIPS.RA pressure increased by a mean ± SD of 4.8 ± 3.9 mmH g(P < 0.001),HVPG decreased by 6.8 ± 3.5 mmH g(P < 0.001).In multivariate linear regression analysis,a higher MELD score,lower platelet count,splenectomy and a higher portal vein pressure were independent predictors of higher RA pressure(R = 0.55).Three variables predicted 3-mo mortality after TIPS in a multivariate analysis:Age,MELD score,and CTP grade C.Change in the RA pressure after TIPS predicted long-term mortality(per 1 mm Hg change,HR = 1.03,95%CI:1.01-1.06,P < 0.012).CONCLUSION:RA pressure increased immediately after TIPS particularly in patients with worse liver function,portal hypertension,emergent TIPS placement and history of splenectomy.The increase in RA pressure after TIPS was associated with increased mortality.Age,splenectomy,MELD score and CTP grade were independent predictors of long-term mortality after TIPS. | Mona Ascha Sami Abuqayyas Ibrahim Hanouneh Laith Alkukhun Mark Sands Raed A Dweik Adriano R Tonelli | 2016 | World Journal of Hepatology2016，8，11： | 13 |
| 2 | 翼型非定常来流下复合运动动态失速仿真显示文摘针对直升机前飞时的动态失速问题,本文采用转捩修正的SST k-ω湍流模型和嵌套网格技术对雷诺数Re为3. 92×10~6时的直升机二维翼型SC1095进行数值仿真。以非定常来流条件下的纯俯仰运动为基础,对比分析了在耦合挥舞、摆振运动时,相位差、振幅对动态失速的影响;比较挥舞、摆振二者运动对于动态失速角的作用大小。结果表明:固定振幅条件下,挥舞和摆振运动相位差的增加会使动态失速角提前,升力系数峰值提高;固定相位角条件下,挥舞和摆振运动振幅的增加会使动态失速角延迟,升力系数峰值减小。挥舞运动对于非定常来流下俯仰运动翼型动态失速角的影响要大于摆振运动。本文计算方法和研究结果为翼型多自由度耦合运动下的动态失速行为预测提供参考。 | 谢凯 Laith K.Abbas 陈东阳 杨富锋 芮筱亭 | 2019 | 哈尔滨工程大学学报2019，40，5： | 10 |
| 3 | 流场环境对柔性立管湿模态的影响显示文摘为了研究静水压力和瞬态流场载荷对三维柔性立管湿模态的影响,本文基于声-固耦合模型对考虑水介质、顶张力情况下的立管进行湿模态计算,并与理论计算结果以及实验数据对比,验证了该模型的准确性;采用不考虑流-固耦合的计算流体力学(computational fluid dynamics,CFD)方法和考虑流固双向耦合的计算流体力学/计算结构力学(computational fluid dynamics/computational structure dynamics,CFD/CSD)方法分别计算了立管的瞬态流场载荷,并与实验数据对比;将水深产生的静水压力和瞬态流场载荷分别加载到三维柔性立管表面进行静力学分析,计算其湿模态。计算结果表明:立管湿模态频率比干模态频率小很多,且随着顶张力增大而增大;静水压力和瞬态流场载荷都使得湿模态频率略微增加;静水压力和瞬态流场载荷对湿模态低阶振型影响较大,对高阶振型几乎没有影响。 | 陈东阳 Laith K.Abbas 王国平 芮筱亭 | 2017 | 哈尔滨工程大学学报2017，38，10： | 6 |
| 4 | Comparison of the Morphology,Structures and Mechanical Properties of Teleost Fish Scales Collected from New Zealand显示文摘The mechanical properties and structures of fish scales have generated considerable research interest,however,comparative studies for different fish scales from difl^rent water regions have not been reported.In this paper,the surface morphologies,hierarchical structures and mechanical properties of four kinds of fish scales collected from freshwater,shallow sea,and deep sea in New Zealand are investigated.The results indicate that the surface morphologies of those fish scales are similar at ventro-lateral,dorso-lateral and anterior locations,and the hierarchical structures of those fish scales all consist of two layers:a bone layer and a collagen layer composed of collagen fibrils.However,the spiral angles of the collagen lamellaes of different scales are different.The largest are Mugil cephalus scales,while the smallest are Cyprinus carpio scales.Comparing the mechanical behaviors of those fish scales,the tensile strength of Carassius auratus scales is the largest,but the ductility is the lowest.Pristipomoides sieboldii scales have the best ductility.Further,the relationship between hierarchical structures and mechanical properties of fish scales is discussed.It is found that the spiral angles of the collagen lamellaes and bond/collagen thickness ratio both have a great influence on the mechanical properties of fish scales. | Deju Zhu Chaohui Zhang Peng Liu Laith A.Jawad | 2019 | Journal of Bionic Engineering2019，16，2： | 6 |
| 5 | 结构误差对旋转稳定弹丸气动特性影响的数值模拟显示文摘基于剪切应力传输(SST)k-ω湍流模型,对考虑结构误差情况下的弹箭模型进行数值模拟计算。首先采用CFD和工程经验公式相结合的方法,得到了不同马赫数、不同转速情况下无结构误差模型的多种气动特性参数。通过与实验数据对比,阻力、法向力、俯仰力矩、压心位置误差在10%以内,验证了该方法的可行性和准确性。然后,建立了考虑结构误差即质量分布不对称、弹体不同轴和无结构误差模型,并分别进行了气动特性模拟计算。结果表明,质量偏心对滚转阻尼力矩系数、马格努斯力矩系数影响很大;弹体不同轴对法向力系数导数、俯仰力矩系数导数、马格努斯力矩系数导数和压心位置都产生很大影响。结构误差使模型的多种气动特性参数产生很大变化,将影响其飞行弹道和稳定性。 | 陈东阳 Laith K.Abbas 芮筱亭 王国平 | 2014 | 空气动力学学报2014，32，5： | 6 |
| 6 | 基于多体系统传递矩阵法和遗传算法的一种物理参数识别方法显示文摘将多体系统传递矩阵法与遗传优化算法相结合,形成了一种新的基于多体系统传递矩阵法和遗传算法的物理参数识别方法(MS-TMM&GA)。应用多体系统传递矩阵法进行动力学建模以及固有振动特性分析。将参数识别问题转化为优化问题,结合遗传算法,对由系统固有频率和增广特征矢量构造的目标函数全局最小值优化求解。给出了通过系统模态参数识别物理参数的计算步骤以及流程图。通过两个数值算例,表明了该方法的可行性及有效性。该方法对多体系统传递矩阵法和遗传算法进行了结合与拓展,无需建立复杂多体系统的总体动力学方程,涉及矩阵阶次低,即可快速获得高精度的优化计算结果。 | 马蕾 芮筱亭 杨富锋 Laith K Abbas 文兵 | 2011 | 振动工程学报2011，24，6： | 6 |
| 7 | 旋转弹箭气动导数与气动热仿真计算显示文摘研究弹箭气动特性优化问题,基于剪切应力传输(SST)k-ω湍流模型,分别对M910弹丸和旋转弹模型F4进行数值仿真。计算采用CFD和工程经验公式相结合的方法,得到了光弹M910和翼身组合体F4在不同攻角,不同旋转速度,不同马赫数下的气动导数分布。通过与实验数据比较分析,阻力系数,法向力系数,俯仰力矩系数导数,滚转阻尼系数误差均在工程误差范围内,验证了本文计算方法的准确性。同时,数值仿真得到旋转弹体绝热壁面温度分布云图和不同旋转速度、不同攻角的弹箭迎风面中心线上温度分布数据图。计算分析为旋转弹箭气动热弹性仿真提供有价值参考。 | 陈东阳 Laith K.Abbas 芮筱亭 | 2014 | 计算机仿真2014，31，5： | 5 |
| 8 | 超声速旋转火箭弹气动特性仿真和分析显示文摘采用CFD方法,基于剪切应力输运(Shear Stress Transport,SST)湍流模型,求解大长细比卷弧翼火箭弹在超声速情况下的气动力和气动热问题.对火箭弹流场进行数值计算,与实验数据进行对比.采用薄壁模型模拟结构耦合传热,计算在一定海拔和旋转情况下火箭弹的气动加热,并与不旋转的情况进行对比.计算结果表明该数值方法能较好地计算气动力因数和气动热分布.在特定的低转速和海拔情况下的火箭弹温度分布比不旋转的稍微大一点,在旋转情况下的火箭弹尾部截面压力分布不对称,尾部流线更加紊乱;弹头和尾翼前缘温度较高,应当在火箭弹设计中予以考虑. | 陈东阳 ABBAS Laith K 芮筱亭 王强林 | 2013 | 计算机辅助工程2013，22，6： | 4 |
| 9 | Transfer matrix method for determination of the natural vibration characteristics of elastically coupled launch vehicle boosters显示文摘The analysis of natural vibration characteristics has become one of important steps of the manufacture and dynamicdesignintheaerospaceindustry.Thispaperpresents a new scenario called virtual cutting in the context of the transfer matrix method of linear multibody systems closedlooptopologyforcomputingthefreevibrationcharacteristics of elastically coupled fl xible launch vehicle boosters. In this approach, the coupled system is idealized as a triple-beam system-like structure coupled by linear translational springs,where a non-uniform free-free Euler–Bernoulli beam is used.A large thrust-to-weight ratio leads to large axial accelerations that result in an axial inertia load distribution from nose to tail. Consequently, it causes the development of significan compressive forces along the length of the launch vehicle.Therefore, it is important to take into account this effect in the transverse vibration model. This scenario does not need the global dynamics equations of a system, and it has high computational efficien y and low memory requirements. The validity of the presented scenario is achieved through comparison to other approaches published in the literature. | Laith K.Abbas Qinbo Zhou Hossam Hendy Xiaoting Rui | 2015 | Acta Mechanica Sinica2015，31，4： | 3 |
| 10 | 高超音速双楔形升力面的主动热气动弹性控制问题的研究(英文)显示文摘非线性热弹性和气动不稳定性问题在再入大气层运载工具和高超音速飞行器上都是极为重要的问题,应该在飞行器的设计阶段给予特别的重视。尤其是热力学问题更为重要,因为温度环境的变化可对高超音速飞行器结构的静力学与动力学特性产生显著影响,进而导致动力学不稳定乃至于灾难性的结构疲劳破坏。为了深入理解这类'热'结构的动力学行为,本文分析一种双楔形升力面,该升力面在沉浮和俯仰两个自由度方向都有自由间隙与三次非线性结构刚度。三阶空气动力学活塞理论被用来计算施加于升力面上的非线性非定常气动载荷。还考虑了由于升力面气动加热产生的轴向应力所导致的扭转刚度的损失。根据高速气流产生的隔热层温度可以预估气动加热的影响。主动控制是今年来兴起的主要用于航空宇航结构系统的新技术,为了抑制颤振边界上和颤振后的动力响应,我们采用了线性和非线性主动控制策略,给出了建模方法及其仿真结果。值得强调的是,当扭转刚度损失较大时有可能引发升力面的动力学不稳定状态。此外,主动控制策略还可以拓展颤振边界,并且能将不稳定极限环振动转变为稳定极限环振动,或者可以将这两种状态的转捩点推向更高的马赫数。 | Laith K Abbas 陈前 Piergiovanni Marzocca Gürdal Zafer Abdalla Mostafa | 2008 | Chinese Journal of Aeronautics2008，21，1： | 3 |
| 11 | An evaluation of risk factors for inadequate cytology in EUS-guided FNA of pancreatic tumors and lymph nodes显示文摘 | Patrick Cleveland Kanwar Rupinder S. Gill Susan G. Coe Timothy A. Woodward Massimo Raimondo Laith Jamil Seth A. Gross Michael G. Heckman Julia E. Crook Michael B. Wallace | 2010 | Gastrointestinal Endoscopy2010，，7： | 2 |
| 12 | 旋转弹丸气动特性的尺度自适应模拟显示文摘为了预测旋转弹丸的气动特性,采用剪切应力输运(shear stress transfer,SST)湍流模型和尺度自适应模拟方法(scale-adaptive simulation,SAS)分别对M910旋转稳定弹丸不同马赫数、不同转速情况下的气动参数及流场特性进行数值计算,并对流场结构进行机理性分析。采用计算结果表明:基于SST湍流模型的定常计算流体力学(computa-tional fluid dynamics)方法可以较好地计算阻力、法向力、俯仰力矩和压心系数,不能准确预测亚音速和跨音速阶段旋转弹丸的滚转阻尼系数以及马格努斯力矩系数导数。采用非定常的尺度自适应模拟方法可以较好地计算旋转弹丸亚音速到超高音速阶段的滚转阻尼系数和马格努斯力矩系数导数。能否准确捕捉非定常尾涡效应对亚前后顺序音速和跨音速段滚转阻尼及马格努斯力矩计算精度影响很大。采用'全隐式多网格完全耦合求解技术'具有计算速度快、数值稳定的优点。同时,编写的批文件计算脚本提高了仿真工作的效率。 | 陈东阳 ABBAS Laith K 王国平 芮筱亭 | 2018 | 哈尔滨工程大学学报2018，39，3： | 2 |
| 13 | The use of an injectable, biodegradable calcium phosphate bone substitute for the prophylactic augmentation of osteoporotic vertebrae and the management of vertebral compression fractures 显示文摘 | Bo Bai Laith M J Frederick JK | 1999 | Spine1999，24，： | 1 |
| 14 | A microstructure-based viscoplastic model for asphalt concrete显示文摘 | LAITH TASHMAN EYAD MASAD | 2005 | International Journal of Plasticity2005，21，： | 1 |
| 15 | Amblyopia screening for first and second-grade children in Jordan显示文摘AIM:To share the results of a national screening program for amblyopia in school children in the north of Jordan.METHODS:This is a prospective national screening study for amblyopia.The program rolls first and second-grade children(6 to 7 years old) in the north of Jordan.The eye examination included:best-corrected visual acuity,cover-uncover test,and cycloplegic retinoscopy.Monocular visual acuity was tested using an ETDRS visual acuity chart without correction.Moreover,children were tested with full cycloplegic refraction when the test criteria were met.Unilateral amblyopia was defined as a best-corrected visual acuity difference of 2 or more lines.In comparison,bilateral amblyopia was defined as a best-corrected visual acuity of 20/40 or worse in the best eye.RESULTS:The prevalence of amblyopia for the total sample tested(n=17 203) was 2.78%(n=479).The most common cause of amblyopia was hypermetropia(64.45%),followed by previous ocular surgeries(15.1%),myopia(10.43%),strabismus(9.39%),and congenital cataract(0.63%).CONCLUSION:This is the first and only study,identifing modifiable risk factors in Jordanian children with amblyopia.In their first couple of years of elementary education,many Jordanian children are affected by amblyopia and pass unnoticed.A more governmental effort is needed into screening programs to improve vision in the Jordanian population. | Khalil M.Al-Salem Mohammad S.Saleem Ismat Ereifej Hamzeh M.Alrawashdeh Rayed Falah Hussein Obeidat Asma Ali Abdlmohdi Raeda Zaki Al-Momani Layal Mohammed Hammad Omar Ahmad al-Habahbeh Yaqeen M.Assassfeh Laith Ramzi Najib Al-Qsous Ashraf Hatim Adeeb Nasraween Tariq A.Al Maaitah Deya'-Aldin Muneer Hasan Aqeel Ibtehal Eyadeh Awad Alabdulrazzg Abdullah Mahmoud Mohammad Murad Amany Jehad Faleh AL-Zurqan Enas Jamal Mohammad Jaradat Slsabela Emad Suliman Aldhoon Ala'a Majed Dmour Ahmad Talal Asassfeh Jeries Ayman Halaseh Abdel Aziz Ammar Daoud Waha Ayman Alkasasbeh Kholoud GH.Matar | 2022 | International Journal of Ophthalmology(English edition)2022，15，2： | 1 |
| 16 | Spatial epidemiology of hepatitis C virus infection in Egypt: Analyses and implications显示文摘 | Diego F. Cuadros Adam J. Branscum F. DeWolfe Miller Laith J. Abu‐Raddad | 2014 | Hepatology2014，，4： | 1 |
| 17 | Polypyrrole nanofiber surface acoustic wave gas sensors显示文摘 | Laith Al-Mashat Henry D Tran Wojtek Wlodarski | 2008 | Sensors and Actuators B:Chemical2008，134，2： | 1 |
| 18 | Quality in EUS: an assessment of baseline compliance and performance improvement by using the American Society for Gastrointestinal Endoscopy–American College of Gastroenterology quality indicators显示文摘 | Susan G. Coe Massimo Raimondo Timothy A. Woodward Seth A. Gross Kanwar Rupinder S. Gill Laith H. Jamil Mohammad Al-Haddad Michael G. Heckman Julia E. Crook Nancy N. Diehl Michael B. Wallace | 2009 | Gastrointestinal Endoscopy2009，，2： | 1 |
| 19 | The heterogeneity and mechanical response of hot mix asphalt laboratory specimens 显示文摘 | Senthilmurugan T Laith T Eyad M | 2010 | International Journal of Pavement Engineering2010，11，2： | 1 |
| 20 | Licorice: A possible anti-inflammatory and anti-ulcer drug显示文摘 | Adel M. Aly Laith Al-Alousi Hatem A. Salem | 2005 | AAPS PharmSciTech2005，，1： | 1 |
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