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Risk stratification of primary liver cancer

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World Journal of Clinical Cases 2022年第26期10卷 9545-9549页

作者： You-wen tan Department of Hepatology The Third Hospital of Zhenjiang Affiliated Jiangsu UniversityZhenjiang 212000Jiangsu ProvinceChina

The risk stratification of primary liver cancer(PLC)discussed in a review of viral hepatitis and PLC could lead to misunderstandings by *** example,a single study or a small number of studies cannot comprehensively summarize the risk factors of PLC,is not included in the family history of liver cancer,and chronic hepatitis D is listed as a medium risk factor for the development of ***,PLC prediction models with good clinical validation values have been applied clinically,such as the Toronto hepatocellular carcinoma risk index,REACH-B model,and PAGE-B ***,the Chinese,together with several research societies,have formulated the“Guideline for stratified screening and surveillance of primary liver cancer(2020 edition).”This guideline outlines PLC screening in at-risk populations,both in hospitals and *** is recommended to stratify the at-risk population into four risk levels:low-,intermediate-,high-,and extremely *** is highly recommended and applied in clinical practice.

关键词： Risk factors Model Primary liver cancer Hepatocellular carcinoma

Design of PID controller with incomplete derivation based on differential evolution algorithm

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Journal of Systems Engineering and Electronics 2008年第3期19卷 578-583页

作者： Wu Lianghong Wang Yaonan Zhou Shaowu tan wen School of Information and Electric Engineering Hunan Univ. of Science and Technology Xiangtan 411201 P. R. China Coll. of Electric and Information Engineering Hunan Univ. Changsha 410082 P. R. China

To determine the optimal or near optimal parameters of PID controller with incomplete derivation, a novel design method based on differential evolution （DE） algorithm is presented. The controller is called DE-PID controller. To overcome the disadvantages of the integral performance criteria in the frequency domain such as IAE, ISE, and ITSE, a new performance criterion in the time domain is proposed. The optimization procedures employing the DE algorithm to search the optimal or near optimal PID controller parameters of a control system are demonstrated in detail. Three typical control systems are chosen to test and evaluate the adaptation and robustness of the proposed DE-PID controller. The simulation results show that the proposed approach has superior features of easy implementation, stable convergence characteristic, and good computational efficiency. Compared with the ZN, GA, and ASA, the proposed design method is indeed more efficient and robust in improving the step response of a control system.

关键词： PID controller incomplete derivation differential evolution parameter tuning.

Augmented Virtual Stiffness Rendering of a Cable-driven SEA for Human-Robot Interaction

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IEEE/CAA Journal of Automatica Sinica 2017年第4期4卷 714-723页

作者： Ningbo Yu Wulin Zou wen tan Zhuo Yang IEEE Institute of Robotics and Automatic Information Systems Nankai University Tianjin Key Laboratory of Intelligent Robotics Nankai University Haihe Education Park

Human-robot interaction(HRI) is fundamental for human-centered robotics, and has been attracting intensive research for more than a decade. The series elastic actuator(SEA) provides inherent compliance, safety and further benefits for HRI, but the introduced elastic element also brings control difficulties. In this paper, we address the stiffness rendering problem for a cable-driven SEA system, to achieve either low stiffness for good transparency or high stiffness bigger than the physical spring constant, and to assess the rendering accuracy with quantified metrics. By taking a velocity-sourced model of the motor, a cascaded velocity-torque-impedance control structure is established. To achieve high fidelity torque control, the 2-DOF(degree of freedom) stabilizing control method together with a compensator has been used to handle the competing requirements on tracking performance, noise and disturbance rejection,and energy optimization in the cable-driven SEA system. The conventional passivity requirement for HRI usually leads to a conservative design of the impedance controller, and the rendered stiffness cannot go higher than the physical spring constant. By adding a phase-lead compensator into the impedance controller,the stiffness rendering capability was augmented with guaranteed relaxed passivity. Extensive simulations and experiments have been performed, and the virtual stiffness has been rendered in the extended range of 0.1 to 2.0 times of the physical spring constant with guaranteed relaxed passivity for physical humanrobot interaction below 5 Hz. Quantified metrics also verified good rendering accuracy.

关键词： Cable actuation impedance control physical human-robot interaction relaxed passivity series elastic actuator stabilizing 2-DOF(degree of freedom) controllers

Experiments in Consensus-based Decentralized Information Feedback Control Strategies on a Real Robotic Fish Platform

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Journal of Harbin Institute of Technology(New Series) 2013年第5期20卷 62-68页

作者： Hong-Fei Han wen tan School of Control & Computer North China Electric Power University

A decentralized information feedback mechanism was introduced to a group of mobile robots such that the robots asymptotically converge to a given moving formation. While various distributed cooperative control strategies have been studied in theory,few of them have been systematically validated on experimental platforms. This paper demonstrates the experimental results of consensus-based decentralized information feedback mechanism on a multiple mobile robotic fish platform. In this paper, we firstly introduced a fundamental consensus algorithm for systems model and the cooperative control experimental platform,and then experimentally implemented and validated the formation control algorithm through setting transit point and lookup table method and so on. The experimental results show the effectiveness of the consensus-based decentralized information feedback control strategies.

关键词： decentralized feedback formation control communication graph muhi-robot systems

Early diagnostic value of liver stiffness measurement in hepatic sinusoidal obstruction syndrome induced by hematopoietic stem cell transplantation

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World Journal of Clinical Cases 2022年第26期10卷 9241-9253页

作者： You-wen tan Yi-Chun Shi Department of Hepatology The Third Hospital of Zhenjiang Affiliated Jiangsu UniversityZhenjiang 212003Jiangsu ProvinceChina

Hematopoietic stem cell transplantation(HSCT)-sinusoidal obstruction syndrome(SOS),also known as veno-occlusive disease,is a clinical syndrome characterized by symptoms,such as right upper quadrant pain,jaundice,fluid retention,and hepatomegaly,and is caused by pre-treatment-related hepatotoxicity during the early stages after *** diagnosis of HSCT-SOS is based on the revised Seattle or Baltimore *** revised standard by the European Society for Bone Marrow Transplantation in 2016 has good practicability and can be used in combination with these two *** studies have shown the value of liver stiffness measurement(LSM)in the early diagnosis of *** studies investigated LSM specificity and sensitivity for the early diagnosis of *** can distinguish SOS from other post-HSCT complications,enabling a clear differential *** has been shown that median LSM of patients with SOS is significantly higher than that of patients with other treatment-related liver complications(e.g.,acute cholecystitis,cholangitis,antifungal drug-related liver injury,liver graft-versus-host disease,isolated liver biochemical changes,and fulminant Epstein Barr virus related hepatitis reactivation).Therefore,the above data confirmed the utility of LSM and strongly suggested that LSM improves the positive predictive value of the SOS diagnostic clinical score after allogeneic *** diagnosis of SOS is beneficial in preventing severe HSCT complications.

关键词： Hematopoietic stem cell transplantation Sinusoidal obstruction syndrome Liver stiffness measurement Stem cell

Arsenite oxidation by three types of manganese oxides

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Journal of Environmental Sciences 2006年第2期18卷 292-298页

作者： FENG Xiong-han ZU Yan-qun tan wen-feng LIU Fan College of Resources and Environment Huazhong Agricultural University Wuhan 430070 China College of Resources and Environment Yunnan Agricultural University Kunming 650201 China

Oxidation of As（Ⅲ） by three types of manganese oxides and the effects ofpH, ion strength and tartaric acid on the oxidation were investigated by means of chemical analysis, equilibrium redox, X-ray diffraction （XRD） and transmission electron microscopy （TEM）. Three synthesized Mn oxide minerals, bimessite, cryptomelane, and hausmannite, which widely occur in soil and sediments, could actively oxidize As（Ⅲ） to As（Ⅴ）. However, their ability in As（Ⅲ）-oxidation varied greatly depending on their structure, composition and surface properties. Tunnel structured cryptomelane exhibited the highest ability of As （Ⅲ） oxidation, followed by the layer structured birnessite and the lower oxide hausmannite. The maximum amount of As （Ⅴ） produced by the oxidation was in the order （mmol/kg） of cryptomelane （824.2）〉 bimessite （480.4）〉 hausmannite （117.9）, As pH increased from the very low value（pH 2.5）, the amount of As（Ⅲ） oxidized by the tested Mn oxides was firstly decreased, then negatively peaked in pH 3.0 6.5, and eventually increased remarkably. Oxidation of As（Ⅲ） by the Mn oxides had a buffering effects on the pH variation in the solution. It is proposed that the oxidative reaction processes between As （Ⅲ） and biruessite（or cryptomelane） are as follows：（1） at lower pH condition：（MnO2）x＋ H3AsO3 ＋ 0.5H^＋=0.5H2AsO4^- ＋ 0.5HAsO4^2- ＋Mn〉^2＋（MnO2）x-1 ＋ H2O; （2） at higher pH condition：（MnO2）x ＋ H3AsO3 = 0.5H2AsO4^- ＋ 0.5HAsO4^2- ＋ 1.5H^＋＋（MnO2）x-1. MnO. With increase of ion strength, the As（Ⅲ） oxidized by bimessite and cryptomelane decreased and was negatively correlated with ion strength. However, ion strength had little influence on As （Ⅲ） oxidation by the hausmarmite. The presence of tartaric acid promoted oxidation of As（Ⅲ） by birnessite. As for cryptomelane and hansmannite, the same effect was observed when the concentration of tartaric acid was below 4 mmol/L, otherwise the oxidized As（Ⅲ） decreased. These findings are of great significance in improving our understanding

关键词： oxidation of As(Ⅲ) As(Ⅴ) Mn oxides pH ion strength tartaric acid

Modeling of bistatic scattering from an underwater non-penetrable target using a Kirchhoff approximation method

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Defence Technology（防务技术） 2022年第7期18卷 1097-1106页

作者： Bin Wang wen-huan Wang Jun Fan Kai-qi Zhao Fu-lin Zhou Li-wen tan Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration State Key Laboratory of Ocean EngineeringShanghai Jiao Tong UniversityShanghai200240China

A numerical triangulation and transformation into the time domain of a Kirchhoff approximation(KA)method is proposed for the modeling of bistatic scattering from an underwater non-penetrable *** time domain solution in this approximation can be split up into two parts:the solution of reflected field,contributing around the specular direction,and the solution of shadow radiation,contributing around the forward *** average solution in the time domain satisfying the reciprocity principle is *** solution is expressed in terms of non-singular *** proposed method is validated against a normal mode method for bistatic scattering from a rigid ***,the reflected and shadow highlights on the surface of the sphere are shown to verify the integration surface of the reflected field and shadow *** is also tested against a finite element method and an experiment involving a scaled Benchmark Target Strength Simulation Submarine *** time-angle bistatic spectra for the model are evaluated by the direct and transformed average solutions of KA,and the former accelerates its speed of *** results are good,and show that this method can be used to predict the bistatic scattered field of a non-penetrable target.

关键词： Kirchhoff approximation Bistatic scattering Time domain Reciprocity Experiment

Fusing multi-source data to map spatio-temporal dynamics of winter rape on the Jianghan Plain and Dongting Lake Plain, China

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Journal of Integrative Agriculture 2019年第10期18卷 2393-2407页

作者： TAO Jian-bin LIU wen-bin tan wen-xia KONG Xiang-bing XU Meng Key Laboratory for Geographical Process Analysis & Simulation of Hubei Province/School of Urban and Environmental Sciences Central China Normal UniversityWuhan 430079P.R.China Key Laboratory of the Loess Plateau Soil Erosion and Water Loss Process and Control Ministry of Water Resources/Yellow River Institute of Hydraulic ResearchZhengzhou 450003P.R.China

Mapping crop distribution with remote sensing data is of great importance for agricultural production, food security and agricultural sustainability. Winter rape is an important oil crop, which plays an important role in the cooking oil market of China. The Jianghan Plain and Dongting Lake Plain (JPDLP) are major agricultural production areas in China. Essential changes in winter rape distribution have taken place in this area during the 21st century. However, the pattern of these changes remains unknown. In this study, the spatial and temporal dynamics of winter rape from 2000 to 2017 on the JPDLP were analyzed. An artificial neural network (ANN)-based classification method was proposed to map fractional winter rape distribution by fusing moderate resolution imaging spectrometer (MODIS) data and high-resolution imagery. The results are as follows:(1) The total winter rape acreages on the JPDLP dropped significantly, especially on the Jianghan Plain with a decline of about 45% during 2000 and 2017.(2) The winter rape abundance keeps changing with about 20–30% croplands changing their abundance drastically in every two consecutive observation years.(3) The winter rape has obvious regional differentiation for the trend of its change at the county level, and the decreasing trend was observed more strongly in the traditionally dominant agricultural counties.

关键词： winter rape,spatio-temporal dynamics,time-series MODIS data artificial neural network

Argon-helium cryoablation for thoracic vertebrae with metastasis of hepatocellular carcinoma-related hepatitis B: A case report

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World Journal of Clinical Cases 2020年第2期8卷 377-381页

作者： You-wen tan Yun Ye Li Sun Department of Hepatology The Third Hospital of Zhenjiang Affiliated Jiangsu University

BACKGROUND Spinal metastasis of hepatocellular carcinoma(HCC) is rare, with an extremely poor prognosis and results in severe pain. Argon-helium cryotherapy is a local ablation method for *** SUMMARY A 54-year-old man was diagnosed with HCC related to hepatitis B one year ago and underwent surgical tumor resection and tenofovir antiviral ***, a new lesion developed on the right liver after 1 mo. Transarterial chemoembolization was performed four times. One month ago, the patient developed back pain, and metastasis on the 11 th thoracic vertebra was ***-helium cryoablation was performed to treat the right occupancy and metastatic lesion, which immediately alleviated the pain and prolonged *** The use of argon-helium cryoablation for thoracic vertebrae with metastasis of HCC achieved favorable results.

关键词： Cryoablation Metastasis Hepatocellular carcinoma Hepatitis B Case report