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Pre-operative enhanced magnetic resonance imaging combined with clinical features predict early recurrence of hepatocellular carcinoma after radical resection

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World Journal of Gastrointestinal Oncology 2024年第4期16卷 1192-1203页

作者： Jian-Ping Chen Ri-Hui Yang Tian-Hui Zhang li-An liao Yu-Ting Guan hai-Yang Dai Department of Intervention Meizhou People’s HospitalMeizhou 514031Guangdong ProvinceChina Department of Medical Imaging Meizhou People’s HospitalMeizhou 514031Guangdong ProvinceChina Department of Medical Imaging Huizhou Municipal Central HospitalHuizhou 516001Guangdong ProvinceChina

BACKGROUND Indentifying predictive factors for postoperative recurrence of hepatocellular carcinoma(HCC)has great significance for patient *** To explore the value of gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid(Gd-EOB-DTPA)enhanced magnetic resonance imaging(MRI)combined with clinical features in predicting early recurrence of HCC after *** A total of 161 patients with pathologically confirmed HCC were *** patients were divided into early recurrence and non-early recurrence group based on the follow-up *** clinical,laboratory,pathological results and Gd-EOB-DTPA enhanced MRI imaging features were *** Of 161 patients,73 had early recurrence and 88 were had non-early *** analysis showed that patient age,gender,serum alpha-fetoprotein level,the Barcelona Clinic liver Cancer stage,China liver cancer(CNLC)stage,microvascular invasion(MVI),pathological satellite focus,tumor size,tumor number,tumor boundary,tumor capsule,intratumoral necrosis,portal vein tumor thrombus,large vessel invasion,nonperipheral washout,peritumoral enhancement,hepatobiliary phase(HBP)/tumor signal intensity(SI)/peritumoral SI,HBP peritumoral low signal and peritumoral delay enhancement were significantly associated with early recurrence of HCC after *** logistic regression analysis showed that patient age,MVI,CNLC stage,tumor boundary and large vessel invasion were independent predictive *** data validation indicated that the area under the curve of the combined predictors was 0.861,suggesting that multivariate logistic regression was a reasonable predictive model for early recurrence of *** Gd-EOB-DTPA enhanced MRI combined with clinical features would help predicting the early recurrence of HCC after operation.

关键词： Hepatocellular carcinoma Enhanced magnetic resonance imaging Microvascular invasion Hepatobiliary phase Recurrence

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Extraction and separation of yttrium from other rare earths in chloride medium by phosphorylcarboxylic acids

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Journal of Rare Earths 2022年第6期40卷 958-964,I0004页

作者： Guolong Wu Zhifeng Zhang Yanling li Wuping liao State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of Science and Technology of China Hefei 230026China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou 341000China

Two phosphorylcarboxylic acids,3-((bis(2-ethylhexyloxy))phosphoryl)propanoic acid(PPA) and 3-((bis(2-ethylhexyloxy))phosphoryl)-3-phenylpropanoic acid(PPPA),were synthesized for separating yttrium from other rare earths in the chloride feed of ion-adsorption type rare earth *** effect of the factors such as pH_(1/2),temperature,saponification degree and phase modifiers was *** separation efficiencies of PPA and PPPA are obviously better than the typical extractants such as sec-octylphenoxy acetic acid(CA-12) and naphthenic acid(NA).The extraction process of rare earths by PPA and PPPA is a cation exchanging reaction,which is similar to those of CA-12 and *** loaded rare earths in both PPA and PPPA systems can be effectively back-extracted by 0.5 mol/L HCl or higher concentration.A cascade extraction process for separating yttrium from other rare earths was developed using PPPA as the *** yttrium product with the purity of 97.20 wt% was obtained by 35 stages of extraction and 12 stages of scrubbing.

关键词： Phosphorylcarboxylic acids Extraction Separation Yttrium Chloride Ion-adsorption type rare earth concentrate

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Vibration and sound transmission loss characteristics of porous foam functionally graded sandwich panels in thermal environment

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Applied Mathematics and Mechanics(English Edition) 2023年第6期44卷 897-916页

作者： Wenhao YUAN haitao liao Ruxin GAO Fenglian li Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China School of Mechanical and Electrical Engineering Beijing Information Science and Technology UniversityBeijing 100192China

This study investigates the vibration and acoustic properties of porous foam functionally graded(FG)plates under the influence of the temperature *** dynamics equations of the system are established based on Hamilton's principle by using the higher-order shear deformation theory under the linear displacement-strain *** displacement shape function is assumed according to the four-sided simply-supported(SSSS)boundary condition,and the characteristic equations of the system are derived by combining the motion control *** theoretical model of vibro-acoustic coupling is established by using the acoustic theory and fluid-structure coupling solution method under the simple harmonic acoustic *** system's natural frequency and sound transmission loss(STL)are obtained through programming calculations and compared with the literature and COMSOL simulation to verify the validity and reliability of the theoretical *** effects of various factors,such as temperature,porosity coefficients,gradient index,core thickness,width-to-thickness ratio on the vibration,and STL characteristics of the system,are *** results provide a theoretical basis for the application of porous foam FG plates in engineering to optimize vibration and sound transmission properties.

关键词： porous foam functionally graded(FG)plate thermal environment natural frequency sound transmission loss(STL)

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A lithosphere-atmosphere-ionosphere coupling model for ELF electromagnetic waves radiated from seismic sources and its possibility observed by the CSES

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Science China(Technological Sciences) 2021年第11期64卷 2551-2559页

作者： ZHAO ShuFan SHEN XuHui liao li ZEREN ZhiMa National Institute of Natural Hazards Ministry of Emergency Management of ChinaBeijing 100085China Institute of Geophysics China Earthquake AdministrationBeijing 100081China

Over the last century, abnormal electromagnetic(EM) emissions associated with earthquake(EQ) activities have been widely reported and recorded by ground-based and satellite observations. The mechanism of extremely low-frequency(ELF) EM waves radiated from earthquakes has been gradually established. However, whether EM waves radiated from earthquakes can be detected by low Earth orbit(LEO) satellites remains controversial. In this paper, to address these concerns, a lithosphereatmosphere-ionosphere model of ELF wave propagation is constructed. The features of the simulated EM field at LEO satellite altitudes radiated from earthquakes have been studied. The simulated EM field at the altitude of the China Seismo-Electromagnetic Satellite(CSES) is compared with the sensitivity of electromagnetic(EM) sensors onboard the CSES. The results illustrate that an earthquake with a magnitude over 6.0 can be detected by the EM sensors of the CSES. However, this depends on the focal depth, seismogenic environment and ionospheric parameters.

关键词： earthquakes CSES satellite sensitivity trans-lithosphere-atmosphere-ionosphere ELF wave propagation model

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Thermal annealing promoted room temperature phosphorescence: motion models and internal mechanism

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National Science Review 2023年第11期10卷 171-182页

作者： Yan Gao Jie Lu Qiuyan liao Shuhui li Qianqian li Zhen li Tai Kang Center for life and Medical Sciences Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials Wuhan University Department of Chemistry

Thermal annealing has been proven to be an efficient method to optimize the device performance of organic and polymeric opto-electronic materials. However, no detailed information of aggregate structures was obtained for a deeper understanding of what happens during thermal annealing. Herein, through modulation of molecular configurations by tunable linkage positions, and the amplified amplitudes of molecular motions by incorporation of additional methylene units, accurate changes of aggregated structures upon thermal annealing have been achieved, accompanying with the ‘turn-on’ room temperature phosphorescence(RTP) response by about 4800-and 177-fold increase of lifetimes. The stretching and swing motion models have been proposed, which afforded an efficient way to investigate the science of dynamic aggregation in depth.

关键词： room temperature phosphorescence thermal annealing structural reconfiguration molecular motion intermolecular interaction

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Cellular V2X-Based Integrated Sensing and Communication System:Feasibility and Performance Analysis

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Chinese Journal of Electronics 2024年第4期33卷 1104-1116页

作者： Yibo li Junhui ZHAO Jieyu liao Fajin HU School of Electronic and Information Engineering Beijing Jiaotong University

Communication and sensing are basically required in intelligent transportation. The combination of two functions can provide a viable way in alleviating concerns about resource limitations. To achieve this, we propose an integrated sensing and communication(ISAC) system based on cellular vehicle-to-everything(C-V2X). We first analyze the feasibility of new radio(NR) waveform for ISAC system. We discuss the possibility of reusing NR waveform for sensing based on current NR-V2X standards. Ambiguity function is calculated to investigate the sensing performance limitation of NR waveform. A C-V2X-based ISAC system is then designed to realize the two tasks in vehicular network simultaneously. We formulate an integrated framework of vehicular communication and automotive sensing using the already-existing NR-V2X network. Based on the proposed ISAC framework, we develop a receiver algorithm for target detection/estimation and communication with minor modifications. We evaluate the performance of the proposed ISAC system with communication throughput, detection probability, and range/velocity estimation *** show that the proposed system achieves high reliability communication with 99.9999% throughput and high accuracy sensing with errors below 1 m and 1 m/s in vehicle scenarios.

关键词： Accuracy Estimation Receivers Reliability theory Integrated sensing and communication Throughput Task analysis

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Lake variations in response to climate change in the Tibetan Plateau in the past 40 years

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International Journal of Digital Earth 2013年第6期6卷 534-549页

作者： Jingjuan liao Guozhuang Shen Yingkui li Center for Earth Observation and Digital Earth Chinese Academy of SciencesBeijingChina Department of Geography University of TennesseeKnoxvilleUSA

The Qinghai-Tibetan Plateau plays an important role in global climate and environmental change and holds the largest lake area in China,with a total surface area of 36,900 km^(2).The expansion and shrinkage of these lakes are critical to the water cycle and ecological and environmental systems across the *** this paper,surface areas of major lakes within the plateau were extracted based on a topographic map from 1970,and Landsat MSS,TM and ETM+satellite images from the 1970s to ***,a multivariate correlation analysis was conducted to examine the relationship between the changes in lake surface areas and the changes in climatic variables including temperature,precipitation,evaporation,and sunshine *** results suggest that the variations in lake surface areas within the plateau are closely related to the warming,humidified climate transition in recent years such as the rise of air temperature and the increase in *** particular,the rising temperature accelerates melting of glaciers and perennial snow cover and triggers permafrost degradation,and leads to the expansion of most lakes across the *** addition,different distributions and types of permafrost may cause different lake variations in the southern Tibetan Plateau.

关键词： lake variation climate change Qinghai-Tibetan Plateau

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Prevention strategies of postoperative adhesion in soft tissues by applying biomaterials:Based on the mechanisms of occurrence and development of adhesions

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Bioactive Materials 2023年第8期26卷 387-412页

作者： Jie liao Xiaoming li Yubo Fan Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education Beijing Advanced Innovation Center for Biomedical EngineeringSchool of Biological Science and Medical EngineeringBeihang UniversityBeijing100083China

Postoperative adhesion(POA)widely occurs in soft tissues and usually leads to chronic pain,dysfunction of adjacent organs and some acute complications,seriously reducing patients’quality of life and even being *** for adhesiolysis,there are few effective methods to release existing ***,it requires a second operation and inpatient care and usually triggers recurrent adhesion in a great ***,preventing POA formation has been regarded as the most effective clinical *** have attracted great attention in preventing POA because they can act as both barriers and drug ***,even though much reported research has been demonstrated their efficacy on POA inhibition to a certain extent,thoroughly preventing POA formation is still ***,most biomaterials for POA prevention were designed based on limited experiences,not a solid theoretical basis,showing ***,we aimed to provide guidance for designing anti-adhesion materials applied in different soft tissues based on the mechanisms of POA occurrence and *** first classified the postoperative adhesions into four categories according to the different components of diverse adhesion tissues,and named them as“membranous adhesion”,“vascular adhesion”,“adhesive adhesion”and“scarred adhesion”,***,the process of the occurrence and development of POA were analyzed,and the main influencing factors in different stages were ***,we proposed seven strategies for POA prevention by using biomaterials according to these influencing ***,the relevant practices were summarized according to the corresponding strategies and the future perspectives were analyzed.

关键词： Prevention of postoperative adhesions(POA) Soft tissues Mechanisms of occurrence and development Biomaterials

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Improved BLAST for wireless communications

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Journal of Systems Engineering and Electronics 2006年第1期17卷 48-53页

作者： li Yongzhao liao Guisheng Wang Feng National Key Lab for Radar Signal Processing Xidian Univ. Xi'an 710071 P. R. China Shanghai Research Inst. of Huawei Technologies Co. LTD Shanghai 200050 P. R. China

Bell layered space-time architecture （BLAST） is a multi-antenna communication structure with high spectrum efficiency, and it has found wide applications in LANs and WLANs. However, its performance is much poorer than those of other space-time coding approaches. In order to improve its performance, an improved BLAST based on RAKE receiving is investigated. The new system introduces orthogonal spreading sequences （OSS） into the transmitter while retains the basic structure of BLAST. The proposed receiver suppresses interferences from other antennas by the orthogonality contained in the received signals, and extracts information from each receiving antenna by using RAKE receiving principle to construct efficient statistic decision. Simulation results show that the improved system performs well over both frequency-fiat and frequency-selective fading channels.

关键词： bell layered space-time architecture orthogonal spreading sequences RAKE receiving

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On the Existence for Some Special Primitive Elements in Finite Fields

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Chinese Annals of Mathematics,Series B 2016年第2期37卷 259-266页

作者： Qunying liao Jiyou li Keli PU College of Mathematics and Software Science Sichuan Normal University Department of Mathematics Shanghai Jiao Tong University Department of Mathematics and Finance Economics Aba Teachers College

Let F_q be a finite field of characteristic p. In this paper, by using the index sum method the authors obtain a sufficient condition for the existence of a primitive elementα∈ F_(q^n) such that α + α^(-1)is also ... 详细信息

关键词： Finite field Primitive element Normal basis

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