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An Evaluation Framework for Virtual Articulatory Movements Based on Medical Video

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Chinese Journal of Electronics 2019年第3期28卷 585-592页

作者： LI Rui yu Jun LI xian FAng Peng WAng Zengfu department of Automation University of Science and Technology of China Institute of Intelligent Machines Chinese Academy of Sciences

An important aspect of a Speech tutoring aimed talking-head system(STTS) is the accuracy of produced articulatory movements. Little work has been done for the Articulatory movements’ accuracy(AMA)evaluation in STTSs. Although subjective evaluation is reliable, it is time consuming and inconvenient. The traditional objective evaluation is comparing the motion of several points on the surface of the synthetic articulator to the Electromagnetic articulography(EMA) data which describes the motion of correspond.ng points on the articulatory surface of a speaker. The EMA information is too limited to describe the whole shape changing of deformable articulators for a speech process. To solve this problem, we propose a substantially different objective evaluation method based on a separately recorded medical video. The synthetic articulatory shapes in a speech process are compared to the correspond.ng shapes tracked from the medical video. This method is translation,rotation, and scaling invariant which allows the comparison of the shapes from the synthetic tongue and the medical images. The time difference problem of synthesis results and medical video is solved by introducing dynamic time warping(dTW) to the proposed method. Experimental results demonstrate that our method has the ability to evaluate the deformation shape accuracy from an entire articulation process. The comparison results suggest that our method is more accurate than the traditional method especially for deformable articulators.

关键词： Accuracy evaluation Medical video Articulatory animation Speech tutoring aimed talkinghead system

Twelve-year outcomes after revascularization for ostial/shaft lesions in unprotected left main coronary artery

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Journal of Geriatric Cardiology 2020年第6期17卷 338-343页

作者： xian-Peng yu yu LI Ji-Qiang HE Ze-Ning JIN department of Cardiology Beijing Anzhen HospitalCapital Medical UniversityBeijingChina department of Cardiology and Macrovascular disease Beijing Tiantan HospitalCapital Medical UniversityBeijingChina

Objective To evaluate a very long-term clinical outcomes of patients treated with coronary artery bypass grafting(CABG) and percutaneous coronary intervention(PCI) with drug-eluting stents(dES) for ostial/shaft lesions in unprotected left main coronary artery(ULMCA). Methods & Results A total of 472 patients with isolated ostial/shaft lesions in ULMCA were enrolled, who received dES implantation or underwent CABG between January 2003 and July 2009 in Beijing Anzhen Hospital. The major endpoints of this study were death, repeat revascularization, non-procedural myocardial infarction(MI) and stroke. The median follow-up was twelve years(interquartile range: 9.4–14.0 years) in the overall patients. There were no significant differences of incidence of death(23.3% vs. 25.6%, P = 0.227), repeat revascularization(27.3% vs. 28.4%, P = 0.423), non-procedural MI(20.0% vs. 14.5%, P = 0.561), and stroke(6.1% vs. 9.3%, P = 0.255) between PCI and CABG groups before multivariate adjusting. After adjusting covariates with multivariate Cox hazard regression model, there were still no significant differences between PCI and CABG groups. Conclusions during the median follow-up of twelve years, we found that PCI with dES was as effective and safe as CABG in patients with left main ostial/shaft lesion in this observational study.

关键词： Coronary artery bypass grafting Left main ostial/shaft lesions Percutaneous coronary intervention Prognosis

Hysteretic behavior of post-tensioned precast segmental CFT double-column piers

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Earthquake Engineering and Engineering Vibration 2023年第3期22卷 747-762页

作者： Li xian Zhang Zilin Zhou Tao Xiao yu Sun yushun Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Civil Engineering China University of Mining and TechnologyXuzhou 221116China Jiangsu Collaborative Innovation Center for Build.ng Energy Saving and Construction Technology Xuzhou 221116China School of Transportation Southeast UniversityNanjing 211189China

Considering the desirable behavior of concrete filled steel tube(CFT)columns and the complicated behavior of segmental double-column piers under cyclic loads,three post-tensioned precast segmental CFT double-column pier specimens were tested to extend their application in moderate and high seismicity *** effects of the number of CFT segments and the steel endplates as energy dissipaters on the seismic behavior of the piers were *** experimental results show that the segmental piers exhibited stable hysteretic behavior with small residual displacements under cyclic *** the tested specimens achieved a drift ratio no less than 13%without significant damage and strength deterioration due to the desirable behavior of CFT *** the deformation of segmental columns was mainly concentrated at the column-footing interfaces,the increase of the segment numbers for each column had no obvious effects on the load.ng capacity but reduced the initial stiffness of the *** use of steel endplates improved the bearing capacity,stiffness and energy dissipation of segmental piers,but weakened their self-centering *** models were also proposed to simulate the hysteretic behavior of the tested specimens,and the influences of segment numbers and prestress levels on seismic behavior were further studied.

关键词： precast segmental piers cyclic load.ng test seismic behavior concrete filled tube column rockinganalysis

New-onset diabetes secondary to acute pancreatitis:An update

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World Journal of Clinical Cases 2022年第30期10卷 10862-10866页

作者： xian-Qiang yu Qian Zhu department of General Surgery Women's and Children’s Hospital Affiliated to Qingdao UniversityQingdao 266034Shandong ProvinceChina department of Hepatobiliary and Pancreatic Surgery Zhongnan Hospital of Wuhan UniversityWuhan 430071Hubei ProvinceChina

diabetes is a condition of persistent hyperglycemia caused by the endocrine disorder of the ***,all pancreatic diseases have the risk of *** particular,increasing attention has been paid recently to new-onset diabetes secondary to acute pancreatitis(AP).The complications of secondary diabetes have caused a lot of trouble for patients and have garnered increasing *** present,the pathophysiological mechanism of new-onset diabetes caused by AP is not *** review summarizes the current understand.ng of new-onset diabetes secondary to AP.

关键词： Acute pancreatitis New-onset diabetes β-cell Hyperglycemia

Time to think: Selecting patients who may benefit from synchronous resection of primary pancreatic cancer and liver metastases

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World Journal of Gastroenterology 2018年第33期24卷 3677-3680页

作者： Si Shi xian-Jun yu department of Pancreatic Surgery Fudan University Shanghai Cancer Center department of Oncology Shanghai Medical College Fudan University Pancreatic Cancer Institute Fudan University

Pancreatic cancer remains a lethal disease and is associated with poor prognosis, particularly for patients with distant metastasis at diagnosis. Recently, Oweira reported a retrospective study that included 13233 metastatic pancreatic cancer patients from the Surveillance, Epidemiology and End Results database. They demonstrated that pancreatic cancer patients with isolated liver metastases had worse outcomes than patients with isolated lung metastases or distant nodal metastases. At present, the standard treatment for metastatic pancreatic cancer is chemotherapy. However, improvement in the safety of pancreatic surgery has led to the consideration of more aggressive surgical approaches. Schneitler reported two cases of hepatic metastatic pancreatic cancer in which negative margin(R0) resection and long survival were achieved after effective preoperative chemotherapy. In general, these two studies indicate that although pancreatic cancer patients with liver metastasis have a poor prognosis, surgical approaches may prolong survival for a few of these patients. A strategy to select hepatic metastatic pancreatic cancer patients who may benefit from surgical intervention is urgently needed.

关键词： Liver metastasis Chemotherapy Pancreatic cancer Surgery

Plant polyploidy and evolution

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Journal of Integrative Plant Biology 2019年第1期61卷 4-6页

作者： Gai Huang yu-xian Zhu Institute for Advanced Studies Wuhan University

Polyploidy refers to two or more complete sets of chromosomes that are combined within a nucleus,and includes both autopolyploidy and allopolyploidy(Otto 2007).Polyploidy is a recurring theme in the evolutionary history of plants and it has been considered an important mechanism for speciation and also for adaptability to changing environments(Shimizu-Inatsugi et al.2017).In nature,about one-third of flowering plants are polyploids,and a great majority of them are *** are many cultivated allopolyploid species,such as cotton,Brassica and potato,the possible evolutionary history of which can be inferred with high certainty.

关键词： Polyploidy history

Global exponential p-norm stability of BAM neural networks with unbounded time-varying delays:A method based on the representation of solutions

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International Journal of Biomathematics 2023年第5期16卷 71-86页

作者： Xi Chen Tingting yu xian Zhang School of Mathematical Science Heilongjiang University No.74 Xuefu Road Harbin 150080P.R.China Heilongjiang Provincial Key Laboratory of the Theory and Computation of Compler Systems Heilongjiang University No.74 Xuefu Road Harbin 150080P.R.China

This paper studies the global exponential p-norm stability of bidirectional associative memory(BAM)neural networks with unbounded time-varying delays.A novel method based on the representation of solutions is put forward to deduce a global exponential p-norm stability *** method does not need to set up any Lyapunov-Krasovskii functionals(LKF),which can greatly reduce a large amount of computations and is simpler than the existing *** the end,representative numerical examples are given to llustrate the availability of the method.

关键词： BAM neural networks global exponential p-norm stability unbounded timevarying delays representation of solutions

Feedback Scheduling of Model-based Networked Control Systems with Flexible Workload

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International Journal of Automation and computing 2008年第4期5卷 389-394页

作者： xian-Ming Tang Jin-Shou yu Research Institute of Automation East China University of Science and TechnologyShanghai 200237PRC

In this paper,a novel control structure called feedback scheduling of model-based networked control systems is proposed to cope with a flexible network load and resource *** state update time is adjusted accord.ng to the real-time network congestion *** observer is used under the situation where the state of the controlled plant could not be *** stability criterion of the proposed structure is proved with time-varying state update *** the basis of the stability of the novel system structure,the compromise between the control performance and the network utilization is realized by using feedback scheduler. Examples are provided to show the advantage of the proposed control structure.

关键词： Model-based networked control system state update time stability criterion feedback scheduling.

Estimation of the turbulent viscous shear stress in a centrifugal rotary blood pump by the large eddy particle image velocimetry method

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Journal of Hydrodynamics 2020年第3期32卷 486-496页

作者： Jing-jing Ji Hao-yuan Li Qing-yu Wu yu Zhang xian-wu Luo School of Clinical Medicine Tsinghua UniversityBeijing 100084China State Key Laboratory of Hydroscience and Engineering Department of Energy and Power EngineeringTsinghua UniversityBeijing 100084China

The non-physiologic turbulent flows in centrifugal rotary blood pumps (RBPs) may result in complications such as the hemolysis and the platelet activation. Recent researches suggest that the turbulent viscous dissipation in the smallest eddies is the main factor of the blood trauma caused by the turbulent flow. The turbulent viscous shear stress (TVSS) was taken as the realistic physical force acting on the cells. However, limited by the temporal and spatial resolutions of the instrumentation currently available, very limited studies are available for the TVSS in the RBPs. In this paper, the large eddy particle image velocimetry (PIV) method is used to estimate the turbulent dissipation rate in the sub-grid scale, to investigate the effect of the TVSS on the blood trauma. detailed flow characteristics, such as the relative velocity vectors, the estimated TVSS levels and the Kolmogorov length scales, are analyzed in three impeller phases at three constant flow rates (3 L/min, 5 L/min and 7 L/min). Over the measures range in this study, the maximum TVSS in the investigated RBP is lower than the reported critical value of stress. This study demonstrates that the large eddy PIV method is effective to evaluate the flow-dependent force on the cells. On the other hand, it is found that the TVSS is highly dependent on the flow behavior. Under severe off-design conditions, the complex flow characteristics, such as the flow separation and the vortical structures, will increase the TVSS. Thus, in order to reduce the hemolysis in the RBPs, the flow disturbance, induced by the departure of the incidence angle, should be avoided during the design of the RBPs.

关键词： Rotary blood pump turbulent flow turbulent viscous shear stress large eddy particle image velocimetry flow separation