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Reduction of electric field strength by two species of trees under power transmission lines

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Journal of Forestry Research 2018年第5期29卷 1415-1422页

作者： Hongwei Zhou Liping Sun Yang Yang che liu Tianshi liu Penghao Xie Ling Ma Northeast Forestry University Harbin 150040 People'sRepublic of China Department of Electrical Engineering Tsinghua UniversityBeijing 100084 People's Republic of China

Electrical pollution is a worldwide concern,because it is potentially harmful to human *** not only play a significant role in moderating the climate,but also can be used as shields against electrical *** effects on the electric field strength under transmission lines by two tree species,Populus alba and Larix gmelinii,were examined in this *** electrical resistivity at different heights of trees was measured using a PiCUS sonic tomograph,which can image the electrical impedance for *** electric field strength around the trees was measured with an elf field strength measurement system,HI-3604,and combined with tree resistivity to develop a model for calculating the electric field intensity around trees using the finite element *** addition,the feasibility of the finite element method was confirmed by comparing the calculated results and experimental *** results showed that the trees did reduce the electric field *** electric field intensity was reduced by 95.6%,and *** was better than *** at shielding.

关键词： Trees Power transmission lines Electric environment Tree electrical resistivity Shielding Finite element method

Study on gas and wave in a receiving tube

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Journal of Thermal Science 2008年第2期17卷 170-174页

作者： Dapeng Hu Shengtao chen Jun Yang Zuzhi chen Yuqiang Dai che Zhu Runjie liu Institute of chemical Engineering Dalian University of Technology Dalian Liaoning China

The gas and wave＇s motion in a receiving tube are investigated numerically and experimentally in the present paper. The results show that, velocity of the contact face rises rapidly as gas is injected into the receiving tube, and then drops sharply after a steady propagation. However, velocity of the wave in the tube is almost linear and the wave can be reflected at the close end of the receiving tube. With increasing of inlet pressure, velocity of the wave and steady velocity of contact face also increase. There is obvious thermal effect as the wave sweeps the gas. The reflected wave can heat the exhausting gas in the open end. As an absorber, an expander and a shrink in the robe can almost completely absorb the reflected wave.

关键词： contact face wave receiving tube absorber

Potential recoverable natural gas resources in China

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Petroleum Science 2008年第1期5卷 83-86页

作者： liu chenglin Zhu Jie che Changbo liu Guangd School of Resource and Information China University of Petroleum Beijing 102249 China Oil and Gas Resource Strategy Research Center of the Ministry of Land and resource Beijing China

Natural gas resources in China are abundant. The undiscovered recoverable natural gas resources in China are estimated to be 19.27 ×10^12 m^3. Natural gas is mainly distributed in the middle and west China and offshore areas of China. The Tarim Basin, Sichuan Basin, Ordos Basin, East China Sea Basin, Tsaidam Basin, Yinggehai Basin, and Qiongdongnan Basin are the main gas-bearing basins. The natural gas resources are not distributed evenly and are under-explored in China. The deeper horizons in east China, foreland basins and craton paleo-uplifts in the middle and west China, and the offshore basins are the main exploration areas in the future.

关键词： Natural gas resources exploration area China

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紫外线法对压载水中淡水藻的灭活效果

同济大学学报（自然科学版） 2013年第9期41卷 1411-1416页

作者：刘澈清华大学环境学院北京100084 中国电子工程设计院北京100840

按照《船舶压载水和沉积物控制和管理国际公约》对岸基测试试验的要求,采用准平行光束仪对8种淡水藻辐射,黑暗环境培养5d,确定剂量反应关系,研究紫外线对它们的灭活效果及特点.结果表明,紫外线法对梅尼小环藻、谷皮菱形藻、小球衣藻和... 详细信息

按照《船舶压载水和沉积物控制和管理国际公约》对岸基测试试验的要求,采用准平行光束仪对8种淡水藻辐射,黑暗环境培养5d,确定剂量反应关系,研究紫外线对它们的灭活效果及特点.结果表明,紫外线法对梅尼小环藻、谷皮菱形藻、小球衣藻和铜绿微囊藻具有一定的灭活效果,灭活率随着紫外线剂量的增加而提高;小剂量的紫外线会刺激镰形纤维藻和斜生栅藻细胞生长,在剂量大于300mJ·cm-2时藻细胞的数量开始缓慢减少;剂量小于400mJ·cm-2时对钝脆杆藻和卵形隐藻没有灭活效果.紫外线对淡水藻的灭活效果较差.藻细胞个体大小不是影响紫外线灭活效果的原因,藻的种类、藻细胞壁的有无及其成分的不同可能是造成不同灭活效果的原因.

关键词：压载水紫外线法紫外线剂量淡水藻灭活效果

Development and validation of a nomogram model for predicting the risk of gallstone recurrence after gallbladder-preserving surgery

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Hepatobiliary & Pancreatic Diseases International 2024年第3期23卷 288-292页

作者： Peng liu Yong-Wei chen che liu Yin-Tao Wu Wen-Chao Zhao Jian-Yong Zhu Yang An Nian-Xin Xia Faculty of Hepato-Pancreato-Biliary Surgery the First Medical CenterChinese PLA General HospitalBeijing 100853China Institute of Hepatobiliary Surgery of Chinese PLA Beijing 100853China Key Laboratory of Digital Hepetobiliary Surgery of Chinese PLA Beijing 100853China

Background:The high incidence of gallstone recurrence was a major concern for laparoscopic gallbladderpreserving *** study aimed to investigate the risk factors for gallstone recurrence after gallbladder-preserving surgery and to establish an individualized nomogram model to predict the risk of gallstone ***:The clinicopathological and follow-up data of 183 patients who were initially diagnosed with gallstones and treated with gallbladder-preserving surgery at our hospital from January 2012 to January 2019 were retrospectively *** independent predictive factors for gallstone recurrence following gallbladder-preserving surgery were identified by multivariate logistic regression analysis.A nomogram model for the prediction of gallstone recurrence was constructed based on the selected *** C-index,receiver operating characteristic(ROC)curve and calibration curve were used to evaluate the predictive power of the nomogram model for gallstone ***:During the follow-up period,a total of 65 patients experienced gallstone recurrence,and the recurrence rate was 35.5%.Multivariate logistic regression analysis revealed that the course of gallstones>2 years[odds ratio(OR)=2.567,95%confidence interval(CI):1.270-5.187,P=0.009],symptomatic gallstones(OR=2.589,95%CI:1.059-6.329,P=0.037),multiple gallstones(OR=2.436,95%CI:1.133-5.237,P=0.023),history of acute cholecystitis(OR=2.778,95%CI:1.178-6.549,P=0.020)and a greasy diet(OR=2.319,95%CI:1.186-4.535,P=0.014)were independent risk factors for gallstone recurrence after gallbladder-preserving surgery.A nomogram model for predicting the recurrence of gallstones was established based on the above five *** results showed that the C-index of the nomogram model was 0.692,suggesting it was valuable to predict gallstone ***,the calibration curve showed good consistency between the predicted probability and actual ***:The nomogram model for

关键词： Gallstone Gallbladder-preserving surgery Recurrence Risk factors Nomogram

Varicella-zoster virus ORF7 interacts with ORF53 and plays a role in its trans-Golgi network localization

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Virologica Sinica 2017年第5期32卷 387-395页

作者： Wei Wang Wenkun Fu Dequan Pan Linli Cai Jianghui Ye Jian liu che liu Yuqiong Que Ningshao Xia Hua Zhu Tong cheng State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics National Institute of Diagnostics and Vaccine Development in Infectious Diseases School of Public Health Xiamen University Department of Microbiology Biochemistry and Molecular Genetics New Jersey Medical SchoolRutgers University

Varicella-zoster virus(VZV) is a neurotropic alphaherpesvirus that causes chickenpox and shingles. ORF7 is an important virulence determinant of VZV in both human skin and nerve tissues,however, its specific function and involved molecular mechanism in VZV pathogenesis remain largely elusive. Previous yeast two-hybrid studies on intraviral protein-protein interaction network in herpesviruses have revealed that VZV ORF7 may interact with ORF53, which is a virtually unstudied but essential viral protein. The aim of this study is to identify and characterize VZV ORF53, and to investigate its relationship with ORF7. For this purpose, we prepared monoclonal antibodies against ORF53 and, for the first time, characterized it as a ~40 k Da viral protein predominantly localizing to the trans-Golgi network of the infected host cell. Next, we further confirmed the interaction between ORF7 and ORF53 by co-immunoprecipitation and co-localization studies in both plasmid-transfected and VZV-infected cells. Moreover, interestingly, we found that ORF53 lost its trans-Golgi network localization and became dispersed in the cytoplasm of host cells infected with an ORF7-deleted recombinant VZV, and thus ORF7 seems to play a role in normal subcellular localization of ORF53. Collectively, these results suggested that ORF7 and ORF53 may function as a complex during infection, which may be implicated in VZV pathogenesis.

关键词： varicella-zoster virus(VZV) ORF7 ORF53 protein-protein interaction trans-Golgi network

Electromagnetic Metamaterials:From Classical to Quantum

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Electromagnetic Science 2023年第1期1卷 56-88页

作者： Jianwei You Qian Ma Lei Zhang che liu Jianan Zhang Shuo liu Tiejun Cui State Key Laboratory of Millimeter Waves School of Information Science and EngineeringSoutheast UniversityNanjing 210096China

Electromagnetic(EM)metamaterials are artificially engineered materials with extraordinary EM properties beyond the limit of existing nat-ural materials;thus,they have been widely used to manipulate the amplitude,phase,polarization,frequency,wave vector,waveform,and other degrees of freedom of EM waves in many practical *** this review,we will summarize recent advances in this flourishing field of EM metamateri-als,first from the perspectives of the classical regime and then the quantum *** specifically,in the classical regime,traditional EM metamate-rials are based on effective medium theory,and they have limitations of fixed functionalities and an inability to control EM waves in real *** over-come these restrictions,information metamaterials,including digital coding and field-programmable metamaterials,have recently been proposed to en-able real-time manipulation of EM waves based on the theory of information *** taking advantage of information metamaterials and artificial in-telligence,another crucial milestone of intelligent metamaterials has been achieved in the development of classical *** overviewing EM metamaterials in the classical regime,we discuss cutting-edge studies of EM metamaterials in the quantum regime,namely,topological metamaterials and quantum *** nonclassical metamaterials show excellent ability to flexibly manipulate the quantum states,and they extend the clas-sical information metamaterials into the field of quantum information *** the end of this review,we will give some conclusions and perspectives on this fast-evolving field.

关键词： Electromagnetic metamaterial Information metamaterial Artificial intelligence Topological metamaterial Quantum metamaterial

Intelligent metasurfaces:control,communication and computing

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eLight 2022年第1期2卷 75-98页

作者： Lianlin Li Hanting Zhao che liu Long Li Tie Jun Cui State Key Laboratory of Advanced Optical Communication Systems and Networks School of ElectronicsPeking UniversityBeijing 100871China Key Laboratory of High‑Speed Circuit Design and EMC of Ministry of Education School of Electronic EngineeringXidian UniversityXi’an 710071China State Key Laboratory of Millimeter Waves Southeast UniversityNanjing 210096China

Controlling electromagnetic waves and information simultaneously by information metasurfaces is of central importance in modern *** metasurfaces are smart platforms to manipulate the wave-information-matter interactions without manual intervention by synergizing engineered ultrathin structures with active devices and algorithms,which evolve from the passive composite materials for tailoring wave-matter interactions that cannot be achieved in ***,we review the recent progress of intelligent metasurfaces in wave-information-matter controls by providing the historical background and underlying physical *** we explore the application of intelligent metasurfaces in developing novel wireless communication architectures,with particular emphasis on metasurface-modulated backscatter wireless *** also explore the wave-based computing by using the intelligent metasurfaces,focusing on the emerging research direction in intelligent ***,we comment on the challenges and highlight the potential routes for the further developments of the intelligent metasurfaces for controls,communications and computing.

关键词： communication computing intelligent

Impact of B-mode-ultrasound-guided transhepatic and transperitoneal cholecystostomy tube placement on laparoscopic cholecystectomy

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World Journal of Gastroenterology 2020年第36期26卷 5498-5507页

作者： Peng liu che liu Yin-Tao Wu Jian-Yong Zhu Wen-Chao Zhao Jing-Bo Li Hong Zhang Ying-Xiang Yang Department of Hepatobiliary Surgery The Sixth Medical Center of People’s Liberation Army General HospitalBeijing 100048China

BACKGROUND B-mode-ultrasound-guided percutaneous cholecystostomy(PC)may be performed by a transhepatic or transperitoneal approach,called percutaneous transhepatic gallbladder drainage(PHGD)and percutaneous transperitoneal gallbladder drainage(PPGD),*** compared the impact of PC related to the route of catheter placement on subsequent laparoscopic cholecystectomy(LC).AIM To compare the impact of PC related to the route of catheter placement on subsequent *** We retrospectively studied 103 patients with acute calculous cholecystitis who underwent scheduled LC after PC between January 2010 and January *** I included 58 patients who underwent scheduled LC after *** II included 45 patients who underwent scheduled LC after *** outcomes were analyzed according to each *** Baseline demographic characteristics did not differ significantly between both groups(P>0.05).Both PHGD and PPGD were able to quickly resolve cholecystitis *** I showed significantly higher efficacy than group II in terms of lower pain score during puncture(3.1 vs 4.5;P=0.001)and at 12 h follow-up(1.5 vs 2.2;P=0.001),lower rate of fever within 24 h after PC(13.8%vs 42.2%;P=0.001),shorted operation duration(118.3 vs 139.6 min;P=0.001),lower amount of intraoperative bleeding(72.1 vs 109.4 mL;P=0.001)and shorter length of hospital stay(14.3 d vs 18.0 d;P=0.001).However,group II had significantly lower rate of local bleeding at the PC site(2.2%vs 20.7%;P=0.005)and lower rate of severe adhesion(33.5%vs 55.2%;P=0.048).No significant differences were noted between both groups regarding the conversion rate to laparotomy,rate of subtotal cholecystectomy,complications and *** B-mode-ultrasound-guided PHGD is superior to PPGD followed by LC for treatment of acute calculous cholecystitis,with shorter operating time,minimal amount of intraoperative bleeding and short length of hospital stay.

关键词： Acute calculous cholecystitis Percutaneous transhepatic gallbladder drainage Percutaneous transperitoneal gallbladder drainage Laparoscopic cholecystectomy Bmode ultrasound Acute cholecystitis