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Accurate ultrasonography-based portal pressure assessment in patients with hepatocellular carcinoma

World Journal of Gastrointestinal Oncology 2020年第8期12卷 931-941页

作者： Yu Zhang Zhong Wang Zhen-dong Yue Hong-Wei Zhao Lei Wang Zhen-Hua fan Yi-fan Wu fu-LiangHe fu-Quan Liu Department of Interventional Therapy Peking University Ninth School of Clinical MedicineBeijing Shijitan Hospital and Capital Medical UniversityBeijing 100038China

BACKGROUND Portal pressure is of great significance in the treatment of hepatocellular carcinoma(HCC),but direct measurement is complicated and costly;thus,noninvasive measurement methods are urgently *** To investigate whether ultrasonography(US)-based portal pressure assessment could replace invasive transjugular *** A cohort of 102 patients with HCC was selected(mean age:54±13 years,male/female:65/37).Pre-operative US parameters were assessed by two independent investigators,and multivariate logistic analysis and linear regression analysis were conducted to develop a predictive formula for the portal pressure gradient(PPG).The estimated PPG predictors were compared with the transjugular PPG *** was conducted on another cohort of 20 non-surgical *** The mean PPG was 17.32±1.97 *** analysis identified the association of the following four parameters with PPG:Spleen volume,portal vein diameter,portal vein velocity(PVV),and portal blood flow(PBF).Multiple linear regression analysis was performed,and the predictive formula using the PVV and PBF was as follows:PPG score=19.336-0.312×PVV(cm/s)+0.001×PBF(mL/min).The PPG score was confirmed to have good accuracy with an area under the curve(AUC)of 0.75(0.68-0.81)in training *** formula was also accurate in the validation patients with an AUC of 0.820(0.53-0.83).CONCLUSION The formula based on ultrasonographic Doppler flow parameters shows a significant correlation with invasive PPG and,if further confirmed by prospective validation,may replace the invasive transjugular assessment.

关键词： Portal pressure gradient Hepatic vein pressure gradient Hepatocellular carcinoma Transjugular Portal pressure Portal vein pressure

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Safety-enhanced Polymer Electrolytes with High Ambient-temperature Lithium-ion Conductivity Based on ABA Triblock Copolymers

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Chinese Journal of Polymer Science 2022年第1期40卷 21-28页

作者： dong Liu fan Wu Zhi-Hao Shen Xing-He fan Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationCenter for Soft Matter Science and EngineeringCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

Liquid electrolytes used in lithium-ion batteries suffer from leakage,flammability,and lithium dendrites,making polymer electrolyte a potential ***,a series of ABA triblock copolymers(ABA-x)containing a mesogen-jacketed liquid crystalline polymer(MJLCP)with a polynorbornene backbone as segment A and a second polynorbornene-based polymer having poly(ethylene oxide)(PEO)side chains as segment B were synthesized through tandem ring-opening metathesis *** block copolymers can self-assemble into ordered morphologies at 200℃.After doping of lithium salts and ionic liquid(IL),ABA-x self-assembles into cylindrical *** MJLCP segments with a high glass transition temperature and a stable liquid crystalline phase serve as physical crosslinking points,which significantly improve the mechanical performance of the polymer *** ionic conductivity of ABA-x/lithium salt/IL is as high as 10-3 S·cm-1 at ambient temperature owing to the high IL uptake and the continuous phase of conducting PEO *** relationship between ionic conductivity and temperature fits the Vogel-Tamman-fulcher(VTF)*** addition,the electrolyte films are flame retardant owing to the addition of *** polymer electrolytes with good safety and high ambient-temperature ionic conductivity developed in this work are potentially useful in solid lithium-ion batteries.

关键词： ABA triblock copolymer Polymer electrolyte Ionic conductivity Inflammability Cylindrical structure

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Development of an ANN-based building energy model for information-poor buildings using transfer learning

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Building Simulation 2021年第1期14卷 89-101页

作者： Ao Li fu Xiao Cheng fan Maomao Hu Department of Building Services Engineering The Hong Kong Polytechnic UniversityHong KongChina Department of Construction Management and Real Estate College of Civil EngineeringShenzhen UniversityShenzhenChina Oxford e-Research Centre Department of Engineering Science University of OxfordOxfordUK

Accurate building energy prediction is vital to develop optimal control strategies to enhance building energy efficiency and energy *** recent years,the data-driven approach based on machine learning algorithms has been widely adopted for building energy prediction due to the availability of massive data in building automation systems(BASs),which automatically collect and store real-time building operational *** new buildings and most existing buildings without installing advanced BASs,there is a lack of sufficient data to train data-driven predictive *** learning is a promising method to develop accurate and reliable data-driven building energy prediction models with limited training data by taking advantage of the rich data/knowledge obtained from other *** studies focused on the influences of source building datasets,pre-training data volume,and training data volume on the performance of the transfer learning *** present study aims to develop a transfer learning-based ANN model for one-hour ahead building energy prediction to fill this research *** 400 non-residential buildings’data from the open-source Building Genome Project are used to test the proposed *** analysis demonstrates that transfer learning can effectively improve the accuracy of BPNN-based building energy models for information-poor buildings with very limited training *** most influential building features which influence the effectiveness of transfer learning are found to be building usage and *** research outcomes can provide guidance for implementation of transfer learning,especially in selecting appropriate source buildings and datasets for developing accurate building energy prediction models.

关键词： building energy prediction data-driven approach transfer learning neural network information poor buildings

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Improved Mechanical Properties in Carbon Martensitic Steel Achieved by Continuous Carbon Gradient and Multilayered Structure

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Acta Metallurgica Sinica(English Letters) 2023年第12期36卷 2069-2078页

作者： Jian Wang Jiantao fan Liming fu Aidang Shan School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Shanghai Key Laboratory of High Temperature Materials and Precision Forming Shanghai Jiao Tong UniversityShanghai 200240China

Increasing carbon content in martensite enhances the strength of carbon steel but reduces ductility and *** this study,a multilayered carbon gradient steel was developed to overcome this trade-off by stacking high-carbon(1 wt%)and low-carbon(0.2 wt%)steel plates through preliminary diffusion and multi-pass hot *** resulting microstructure showed a continuous gradient from high-carbon martensite to low-carbon *** low-temperature tempering,the tempered samples exhibited hardness fluctuations along the normal direction,with a maximum value of approximately 700 HV or more in high-carbon regions and a lower value of 500 HV or less in low-carbon *** to low-carbon steel,the sample tempered at 200℃showed significant improvements in both strength and ductility,with 1880 MPa ultimate tensile strength and 4.7%uniform *** larger uniform elongation than that of the plain low-carbon steel can be attributed to the greater strain hardening rate in high-carbon regions with a high carbon solid solution ***,it is believed that more slip systems in high-carbon regions could be activated under the multiaxial stress around the layer interface,then showing a better ductility than that of the plain high-carbon ***,the gradient structure between different regions effectively helped to avoid abrupt stress and deliver multiaxial stress at any location along the normal *** stepped path of the cracks under uniaxial tensile stress suggested a higher fracture toughness.

关键词： Carbon steel Multilayer Gradient Strength and ductility Multiaxial stress

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Component Importance and Interdependence Analysis for Transmission, Distribution and Communication Systems

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CSEE Journal of Power and Energy Systems 2022年第2期8卷 488-498页

作者： Tao fu Dexin Wang Xiaoyuan fan Qiuhua Huang Pacific Northwest National Laboratory Washington 99354United States

For critical infrastructure restoration planning,the real-time scheduling and coordination of system restoration efforts,the key in decision-making is to prioritize those critical components that are out of service during the *** this purpose,there is a need for component importance *** it has been investigated extensively for individual systems,component importance considering interdependence among transmission,distribution and communication(T&D&C)systems has not been systematically analyzed and widely *** this study,we propose a component importance assessment method in the context of interdependence between T&D&C *** methods for multilayer networks and a set of metrics have been applied for assessing the component importance and interdependence between T&D&C networks based on their physical *** proposed methodology is further validated with integrated synthetic Illinois regional transmission,distribution,and communication(T&D&C)systems,the results reveal the unique characteristics of component/node importance,which may be strongly affected by the network topology and cross-domain node mapping.

关键词： Multilayer network interdependence computer networks

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Review on the Technological Development and Application of UAV Systems

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Chinese Journal of Electronics 2020年第2期29卷 199-207页

作者： fan Bangkui LI Yun ZHANG Ruiyu fu Qiqi Chinese Academy of Engineering

Unmanned aerial vehicles(UAVs) are products of deep integration of aviation technology and Information technology(IT). The core factor of why the UAV industry can become a relatively independent industry and experience rapid development is the full penetration of IT into the aviation industry. Under the networked environment, UAVs are now becoming datadriven mobile agents. With the development of information technology, information transmission networking, operation space digitizing, and flight platform intelligentizing will become the main trends of technological development of UAV systems. The application of UAV systems is not merely a paradigm in transportation, but will more importantly produce "UAV+" novel production modes,service formats, and combat modes associated with *** emerging trends will have profound impacts on future economic and social development as well as the building of armed forces.

关键词： Unmanned aerial vehicle(UAV) Information technology(IT) Information network Data driven Mobile agent

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Simple, fast, label-free, and nanoquencher-free system for operating multivalued DNA logic gates using polythymine templated CuNPs as signal reporters

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Nano Research 2017年第8期10卷 2560-2569页

作者： Daoqing fan Erkang Wang Shaojun dong State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China University of Chinese Academy of Sciences Beijing 100049 China

Boolean logic devices play a key role in both traditional and nontraditional molecular logic circuits. This kind of binary logic, in which each bit is coded by （0, 1）, has only two output states--on or off （or high/low）. Because of the finite computing capacity and variation, it is facing challenges from multivalued logic gates while processing high-density or uncertain/imprecise information. However, a low-cost, simple, and universal system that can perform different multivalued logic computations has not yet been developed, and remains a concept for further study. Herein, taking the ternary OR and INHIBIT logic gates as model devices, we present the fabrication of a novel simple, fast, label-flee, and nanoquencher-free system for multivalued DNA logic gates using poly-thymine （T） templated copper nanoparticles （CuNPs） as signal reporters. The mixture of Cu2~ and ascorbic acid （AA） is taken as a universal platform for all ternary logic gates. Different kinds of poly-T strands and delicately designed complementary poly-adenine （A） strands are alternatively applied as ternary inputs to exhibit the ternary output states （low/0, medium/1, high/2）. Notably, there are no nanoquenchers in this platform as poly-A strands can function as not only inputs but also efficient inhibitors of poly-T templated CuNPs. Moreover, all DNA are unlabeled single-strand DNA that do not need sophisticated labeling procedures or sequence design. The above design greatly reduces the operating time, costs, and complexity. More importantly, the ternary logic computations can be completed within 20 min because of the fast formation of CuNPs, and all of them share the same threshold values.

关键词： label-free nanoquencher-free multivalued logic poly-thymine copper nanoparticles (CuNPs)

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Prediction of chlorophyll a concentration using HJ-1 satellite imagery for Xiangxi Bay in Three Gorges Reservoir

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Water Science and Engineering 2014年第1期7卷 70-80页

作者： dong-xing fan Yu-ling HUANG Lin-xu SONG De-fu LIU Ge ZHANG Biao ZHANG College of Hydraulic and Environmental Engineering China Three Gorges University College of Resources and Environment Sciences Hubei University of Technology

Since the impoundment of the Three Gorges Reservoir in 2003, algal blooms have frequently been observed in it. The chlorophyll a concentration is an important parameter for evaluating algal blooms. In this study, the chlorophyll a concentration in Xiangxi Bay, in the Three Gorges Reservoir, was predicted using HJ-1 satellite imagery. Several models were established based on a correlation analysis between in situ measurements of the chlorophyll a concentration and the values obtained from satellite images of the study area from January 2010 to December 2011. Chlorophyll a concentrations in Xiangxi Bay were predicted based on the established models. The results show that the maximum correlation is between the reflectance of the band combination of B4/（B2＋B3） and in situ measurements of chlorophyll a concentration. The root mean square errors of the predicted values using the linear and quadratic models are 18.49 mg/m3 and 18.52 mg/m3, respectively, and the average relative errors are 37.79% and 36.79%, respectively. The results provide a reference for water bloom prediction in typical tributaries of the Three Gorges Reservoir and contribute to large-scale remote sensing monitoring and water quality management.

关键词： chlorophyll a concentration H J-1 satellite remote sensing prediction correlation analysis Xiangxi Bay Three Gorges Reservoir

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Quantum Mechanical Hilbert Transformation for Normally Ordering Coulomb Potential-Type Operators

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Communications in Theoretical Physics 2006年第2X期46卷 213-216页

作者： fan Hong-Yi fu Liang Department of Materials Science and Engineering University of Science and Technology of China Hefei 230026 China Department of Physics Shanghai Jiao Tong University Shanghai 200030 China Special Glass for the Gifted Young University of Science and Technology of China Hefei 230026 China

We show that the technique of integration within an ordered product of operators can be extended to Hilbert transform. In so doing we derive normally ordered expansion of Coulomb potential-type operators directly by u... 详细信息

关键词： quantum Hilbert transform normally ordering Coulomb potential

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Thermal Equilibrium Reached by Interaction Between Two Identical Systems

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Communications in Theoretical Physics 2008年第6期49卷 1461-1462页

作者： fu Liang fan Hong-Yi Department of Material Science and Engineering University of Science and Technology of China Hefei 230026 China Depatrment of Physics Shanghai Jiao Tong University Shanghai 200030 China

In this work we show that tending to thermal equilibrium in one system, at least in certain cases, is associated with the coherent dynamical evolution of this system in interaction with another identical system. The t... 详细信息

关键词： thermal equilibrium temperature coherent dynamic evolution

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