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Percutaneous portal venoplasty and stenting for anastomotic stenosis after liver transplantation

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World Journal of Gastroenterology 2009年第15期15卷 1880-1885页

作者： Bao-Jie Wei Ren-You Zhai jian-Feng Wang Ding-Ke Dai ping Yu Department of Radiology Beijing Chaoyang HospitalCapital Medical University Beijing 100020 China

AIM:To review percutaneous transhepatic portal venoplasty and stenting(PTPVS)for portal vein anastomotic stenosis(PVAS)after liver transplantation (LT). METHODS:From April 2004 to June 2008,16 of 18 consecutive patients(11 male and 5 female;aged 17-66 years,mean age 40.4 years)underwent PTPVS for *** occurred 2-10 mo after LT(mean 5.0 mo). Three asymptomatic patients were detected on routine screening color Doppler ultrasonography(CDUS). Fifteen patients who also had typical clinical signs of portal hypertension(PHT)were identified by contrastenhanced computerized tomography(CT)or magnetic resonance *** procedures were performed under local *** there was a PVAS75%stenosis and typical clinical signs of *** a 51-year-old woman,who suffered from massive ascites and severe bilateral lower limb edema after secondary LT,PVAS complicated hepatic vein stenosis and inferior vena cava(IVC)stenosis. Before PTPVS,a self-expandable and a balloonexpandable metallic stent were deployed in the IVC and right hepatic vein *** ascites and edema resolved gradually after *** portosystemic collater

关键词： Portal vein Anastomotic stenosis Venoplasty Stent Liver transplantation

Seismic prediction method of multiscale fractured reservoir

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Applied Geophysics 2018年第2期15卷 240-252,363页

作者： Wang Ling-Ling Wei jian-Xin Huang ping Di Bang-Rang Zhang Fu-Hong State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum Beijing 102249 China CNPC Key Laboratory of Geophysical Prospecting China University of Petroleum Beijing 102249 China Research Institute of CNPC Southwest Oil and Gas Field Branch Chengdu 641500 China

Common prestack fracture prediction methods cannot clearly distinguish multiplescale fractures. In this study, we propose a prediction method for macro- and mesoscale fractures based on fracture density distribution in reservoirs. First, we detect the macroscale fractures （larger than 1/4 wavelength） using the multidirectional coherence technique that is based on the curvelet transform and the mesoscale fractures （1/4-1/100 wavelength） using the seismic azimuthal anisotropy technique and prestack attenuation attributes, e.g., frequency attenuation gradient. Then, we combine the obtained fracture density distributions into a map and evaluate the variably scaled fractures. Application of the method to a seismic physical model of a fractured reservoir shows that the method overcomes the problem of discontinuous fracture density distribution generated by the prestack seismic azimuthal anisotropy method, distinguishes the fracture scales, and identifies the fractured zones accurately.

关键词： Multiscales fracture detection coherence attenuation seismic anisotropy

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一种面向服务的动态协同架构及其支撑平台

计算机学报 2005年第4期28卷 467-477页

作者：马晓星余萍陶先平吕建南京大学计算机软件新技术国家重点实验室南京210093 南京大学计算机软件研究所南京210093

为了让面向服务的架构下的应用系统能够灵活地动态演化以适应底层因特网计算环境和用户需求的变化,该文提出了一种面向服务的动态协同架构.该架构引入内置的运行时体系结构对象来解耦系统中的各个服务构件,并通过该对象以体系结构的视... 详细信息

为了让面向服务的架构下的应用系统能够灵活地动态演化以适应底层因特网计算环境和用户需求的变化,该文提出了一种面向服务的动态协同架构.该架构引入内置的运行时体系结构对象来解耦系统中的各个服务构件,并通过该对象以体系结构的视角来重解释服务部件之间的引用和交互.这样就把体系结构这一抽象概念具体化为可直接操控的对象,从而可以利用面向对象程序设计语言的继承和多态等整套机制,导出一种面向体系结构的系统动态演化技术.为支持这一架构,设计并实现了一个支撑平台 Artemis ARC,为具有动态调整能力的面向服务应用系统的开发、运行和监控提供了一套可视化的集成环境.在此平台上还开发了一个简单的示例应用以展示动态调整的效果.

关键词：面向服务的计算软件体系结构动态演化远程对象引用因特网

Impact of edaravone on serum CXC chemokine ligand-13 levels and perioperative neurocognitive disorders in elderly patients with hip replacement

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Chinese Medical Journal 2021年第13期134卷 1610-1615页

作者： Hai-Hui Xie Hong-Yan Ma Shu Zhang jian-Wen Li Qi Han Hui-Qun Chen Bo-Qin Su jian-ping Zhou Department of Anesthesiology Affiliated Dongguan People’s Hospital of Southern Medical UniversityDongguanGuangdong 523018China Department of Nephrology First Hospital of Jilin UniversityChangchunJilin 130021China Department of Orthopaedics Affiliated Dongguan People’s Hospital of Southern Medical UniversityDongguanGuangdong 523018China

Background:Perioperative neurocognitive disorders(PND)are a series of severe complications in the perioperative and anesthetic periods with a decline in memory,execution ability,and information processing speed as the primary clinical *** study aimed to evaluate the impact of edaravone(EDA)on PND and peripheral blood C-X-C motif chemokine ligand 13(CXCL13)levels in elderly patients with hip ***:A total of 160 elderly patients undergoing hip arthroplasty in Affiliated Dongguan People’s Hospital of Southern Medical University(from March 2016 to March 2018)were randomly and double-blindly categorized into an EDA group and a control group(CON).Group EDA was administered intravenously EDA 30 min before surgery,and group CON was administered intravenously *** cognitive function of the two groups was evaluated 1-day before the operation and at 1 and 12 months after surgery,and the incidence of post-operative delirium was tested on days 1,3,and 7 after surgery using the Chinese version of the confusion assessment *** CXCL13 and interleukin(IL)-6 concentrations were measured before anesthesia,during surgery(30 min after skin incision),and on days 1,3,and 7 after *** continuous variables in accordance with normal distribution were tested using the Student’s t test,the continuous variables without normal distribution using the Mann-Whitney U test,and categorical variables by the x 2 test or Fisher exact ***:The incidence of post-operative delirium within 7 days after surgery was significantly higher in group CON than that in group EDA(31.3%vs.15.0%,t=-5.6,P<0.001).The modifiedtelephone interview for cognitive status andactivities of daily life scores were significantly higher in the group EDA than those in the group CON at 1 month(39.63±4.35 vs.33.63±5.81,t=-2.13,P<0.05and 74.3±12.6 vs.61.2±13.1,t=-1.69,P<0.05)and 12 months(40.13±5.93 vs.34.13±5.36,t=-3.37,P<0.05 and 79.6±11.7 vs.65.6±16.6,t=-2.08,P<0.05)after sur

关键词： Edaravone Perioperative neurocognitive disorder Chemokine CXC ligand 13 Interleukin-6

Death mode-dependent reduction in succinate dehydrogenase activity in hair cells of aging rat cochleae

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Chinese Medical Journal 2010年第13期123卷 1633-1638页

作者： YANG Wei-ping HU Bo-hua SUN jian-he ZHAI Suo-qiang Donald Henderson Institute of Otolaryngology People's Liberation Army GeneralHospital Beijing 100853 China Center for H-earing and Deafness State University of New York137 Cary Hall 3435 Main Street Buffalo NY 14214 USA

Background Our previous studies have shown that both apoptosis and necrosis are involved in hair cell （HC） pathogenesis in aging cochleae. To better understand the biological mechanisms responsible for the regulation of HC death, we examined the activity of succinate dehydregenase （SDH）, a mitochondrial bioenergetic enzyme, in the HCs of aging cochleae. Methods The auditory brainstem response thresholds elicited by tone bursts at 4, 10 and 20 kHz were measured in both young （2-3 months） and aging （22-23 months） Wistar rats. SDH activity was evaluated with a colorimetric assay using nitroblue tetrazolium monosodium salt. The SDH-labeled organs of Corti were double stained with propidium iodide, a DNA intercalating fluorescent probe for illustration of HC nuclei. All the specimens were examined with fluorescence microscopy and confocal microscopy. Results Aging rats exhibited a significant elevation of ABR thresholds with threshold shifts being 34 dB at 20 kHz, 28 dB at 10 kHz, and 25 dB at 4 kHz. Consistent with the reduction in the cochlear function, aging cochleae exhibited the reduction of SDH staining intensity in the apical and the basal ends of the cochleae, where a large number of apoptotic, necrotic, and missing HCs were evident. The reduction in SDH staining appeared in a cell-death-mode dependent fashion. Specifically, SDH labeling remained in apoptotic HCs. In contrast, SDH staining was markedly reduced or absent in necrotic HCs. Conclusions In the aging cochlea, SDH activity is preserved in HCs undergoing apoptosis, but is substantially reduced in necrosis. These results sUggest that mitochondrial energetic function is involved in the regulation of cell death pathways in the pathogenesis of aging cochleae.

关键词： aging hair cell apoptosis necrosis mitochondria succinate dehydrogenase

比特交织编码调制(迭代译码)系统标识映射的对称性研究与应用

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电子与信息学报 2014年第1期36卷 48-54页

作者：张建勇延凤平北京交通大学全光网络与现代通信网教育部重点实验室北京100044 北京交通大学光波技术研究所北京100044

该文从群论的角度分析了比特交织编码调制(迭代译码)(BICM(-ID))系统中标识映射的对称性。首先给出了标识映射对称性的定义,并指出,二进制标识映射的对称性是BICM(-ID)系统的固有特性,该对称性同构于m阶超立方的对称群。然后基于BICM(-... 详细信息

该文从群论的角度分析了比特交织编码调制(迭代译码)(BICM(-ID))系统中标识映射的对称性。首先给出了标识映射对称性的定义,并指出,二进制标识映射的对称性是BICM(-ID)系统的固有特性,该对称性同构于m阶超立方的对称群。然后基于BICM(-ID)的对称性,提出一种改进的二进制交换算法(IBSA)。该算法的搜索空间为标识映射对称群陪集的代表系。因此,与传统的二进制算法相比,IBSA的搜索效率得到了提高。最后,2维16阶星座图的仿真结果表明,在40000次的运行过程中,IBSA能提高4%的搜索效率;32阶相移键控星座图的仿真结果表明,该算法至少可提高3.5%的搜索效率,单个映射的计算时间缩短了约4000倍。

关键词：无线通信比特交织编码调制标识映射群理论对称性二进制交换算法

平面射流沿轴线的特征尺度及其对测量信号过滤程度的依赖

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物理学报 2010年第7期59卷 4748-4755页

作者：米建春冯宝平北京大学工学院湍流与复杂系统研究国家重点实验室北京100871

对出口雷诺数约为13000的湍流平面射流瞬时速度(u)测量信号(um)进行高频过滤研究.在分析了高频噪声对u测量精度的影响后,使用Mi等人(2005,***.E71,066304)提出的快速收敛迭代法对um进行了数值过滤,并考察过滤前后统计湍流量的变化.结果... 详细信息

对出口雷诺数约为13000的湍流平面射流瞬时速度(u)测量信号(um)进行高频过滤研究.在分析了高频噪声对u测量精度的影响后,使用Mi等人(2005,***.E71,066304)提出的快速收敛迭代法对um进行了数值过滤,并考察过滤前后统计湍流量的变化.结果发现,噪声的存在不仅对湍流小尺度统计量的估算影响显著,也对与大尺度关联的量产生一定的影响.在有效去除噪声造成的误差后,本文正确地获得了典型湍流特征尺度Kolmogorov微尺度、Taylor微尺度和积分尺度沿平面射流中心线的变化规律.这些特征尺度在经历下游距离约为20倍矩形喷嘴短边边长的发展后,开始呈现随下游距离的线性变化规律,即逐渐进入湍流自保持状态.湍流小尺度统计量比大尺度统计量能更快地发展到自保持状态.

关键词：信号过滤平面射流湍流尺度

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预应力混凝土单室箱梁桥的温度变化

四川大学学报（工程科学版） 2008年第6期40卷 7-13页

作者：韩大建谭毅平亚热带建筑科学国家重点实验室华南理工大学土木工程系广东广州510640 广州市计量检测技术研究院广东广州510663

连续刚构桥的瞬时日照温度效应计算方法的提出,有利于在悬臂浇筑施工过程中修正立模标高。根据观音沙大桥的实测数据和当地气象资料,提出瞬时气温和瞬时相对湿度的计算式,并通过热流方程边界条件求解白天桥面瞬时最高温度。由于桥面温... 详细信息

连续刚构桥的瞬时日照温度效应计算方法的提出,有利于在悬臂浇筑施工过程中修正立模标高。根据观音沙大桥的实测数据和当地气象资料,提出瞬时气温和瞬时相对湿度的计算式,并通过热流方程边界条件求解白天桥面瞬时最高温度。由于桥面温度沿横向非线性分布和两侧腹板的竖向温度梯度不同,应用空间梁单元模型计算温度应力时,需将竖向温度梯度沿单室箱梁中线分成左、右腹板区域,并用双力矩描述节点力。该方法得到的挠度计算误差约为6%,可用于施工控制中预测混凝土桥梁的日照温度变化引起的挠度和内力变化。

关键词：桥梁工程单室箱梁太阳辐射温度效应

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基于搭便车现象的双渠道定价策略

计算机集成制造系统 2016年第4期22卷 1119-1128页

作者：周健石萍唐哲宇同济大学机械与能源工程学院上海201800

针对互联网迅速发展下传统的零售渠道与网络直销渠道并存的双渠道模式,基于消费者效用理论,考虑搭便车的消费者比率和消费者转移成本建立模型。比较了分散式决策下制造商和零售商的最优定价策略与利润,分析了转移成本对价格、需求及利... 详细信息

针对互联网迅速发展下传统的零售渠道与网络直销渠道并存的双渠道模式,基于消费者效用理论,考虑搭便车的消费者比率和消费者转移成本建立模型。比较了分散式决策下制造商和零售商的最优定价策略与利润,分析了转移成本对价格、需求及利润的影响趋势。研究发现,搭便车现象刺激了市场,不但提升了整体需求,而且使制造商和零售商的利润都得到提升;搭便车比率与转移成本对制造商和零售商的市场博弈行为有重要影响,且这两个因素带来的影响具有相似之处。

关键词：双渠道搭便车转移成本定价策略