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Fractal Property of the Cytoskeleton in the Living Cells

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Chinese Physics Letters 1994年第8期11卷 522-525页

作者： TANG Xiaowei liu jinbo WU Bichu Institute of High Energy Physics Acadmia SinicaBeijing 100039 Department of Physics Beijing Polytechnic UniversityBeijing 100022

The fractal property of the cytoskeleton in the living cells is *** on the experimental data of intracellular particle movement,the self-similarity of the cytoskeleton in the living cells is observed and the fractal dimensions of different parts of the cytoskeleton determined by means of line-segment method vary from 1.35 to *** Quasi-Brownian movements of intracellular particles are clearly shown.

关键词： fractal skeleton dimensions

Shifts of sediment bacterial community and respiration along a successional gradient in a typical karst plateau lake wetland(China)

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Journal of Oceanology and Limnology 2021年第3期39卷 880-891页

作者： Pinhua XIA Jian ZHANG jinbo liu Lifei YU Guizhou Key Laboratory for Mountainous Environmental Information and Ecological Protection Guizhou Normal UniversityGuiyang 550001China College of Life Science Guizhou UniversityGuiyang 550025China Collaborative Innovation Center for Mountain Ecology&Agro-Bioengineering Guizhou UniversityGuiyang 550025China Department of Hepatobiliary Surgery the Affi liated Hospital of Southwest Medical UniversityLuzhou 646000China

Bacteria are important regulators of carbon cycling in lakes and are central to sediment ecosystem ***,the sediment microbial communities and their respiratory responses to the lake wetland succession are poorly *** this study,we collected sediment samples from four different succession points(the Potamogeton lucens zone,the Scirpus tabernaemontani zone,the Scirpus triqueter zone,and the Juncus effusus zone)in the Caohai Wetland of the Guizhou Plateau(China).The bacterial communities at these succession points were studied using a high-throughput sequencing *** sediment microbial respiration(SR)was measured using static chambers in the field and basal respiration(BR)was determined in the *** results show that the dominant bacterial taxa in the sediment was Proteobacteria(34.7%),Chloroflexi(17.8%),Bacteroidetes(7.3%),Acidobacteria(6.6%),and Cyanobacteria(6.1%).Principal coordinate analysis showed that the microbial community structure differs significantly at different sampling points along the successional gradient,indicating that the bacterial community structure is sensitive to the lake wetland *** hydrological regimes and soil characteristics such as NH_(4)^(+)-N,Fe^(2+),Mn^(2+),and sediment organic carbon(SOC)content may be important factors responsible for the differences in the sediment microbial characteristics of the different successional stages in the Caohai ***,it was found that the SR increased significantly from the *** zone to the *** zone,but BR had the opposite *** shifts in the bacterial community structure along the successional gradient may be the main reason for the observed differences in sediment respiration.

关键词： sediment bacteria microbial respiration lake wetland Caohai Wetland

Hull deformation measurement for spacecraft TT&C ship by Photogrammetry

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Science China(Technological Sciences) 2015年第8期58卷 1339-1347页

作者： liu HaiBo SUN Cong ZHANG YueQiang liu XinMing liu jinbo ZHANG XiaoHu YU QiFeng College of Aerospace Science and Engineering National University of Defense Technology Hunan Provincial Key Laboratory of Image Measurement and Vision Navigation China Satellite Maritime Tracking and Control Department

When voyaging,ships are subject to inevitable hull deformations caused by the changes in the environmental temperature and external *** are a crucial source of errors when measuring data using a spacecraft tracking,telemetry,and control(TT&C) ship.A prototype system based on photogrammetry was developed for the real-time measurement of a spacecraft TT&C ship's hull *** system has high accuracy,a simple structure,and convenient maintenance,and requires few changes to the ship's *** improve its performance,an estimation approach is proposed for hull deformation *** the proposed approach,the central positions of cross spots in successive frames can be predicted based on the prediction of the camera's attitude,and their extract locations can be found by defining a series of small windows around each predictive ***,the optimal estimate of the camera's attitude is updated by the designed extended Kalman filter using the extracted cross spots and their corresponding local coordinates,with which the hull deformation angles can be *** verify the proposed measurement approach,its performance was tested during the normal sailing,floating,and rocking on the sea of a spacecraft TT&C *** experimental testing results demonstrated that the proposed approach performs well in terms of accuracy and *** can satisfy the hull deformation measurement requirement for a spacecraft TT&C ship in real time.

关键词： photogrammetry ship deformation spacecraft TT&C ship EKF

Removal of Basic Nitrogen Compounds from Coker Diesel by Eutectic Ionic Liquid

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China Petroleum Processing & Petrochemical Technology 2018年第3期20卷 48-54页

作者： liu Jie liu jinbo Li Wenshen Long Wenyu College of Chemistry Chemical Engineering and Environmental Engineering Liaoning Shihua University

The eutectic ionic liquid （EIL） tetraethyl ammonium bromide-malonic acid （TEAB-Mal） was synthesized, with its structure characterized by the FT-IR spectroscopy and the 1H NMR spectrometry. The performance for removal of basic nitrogen compounds by EIL was studied using coker diesel as the feedstock. Experimental results showed that the EIL （TEAB-Mal） exhibited a good denitrogenation performance, leading to a 93.6% of basic N-removal efficiency under reaction conditions covering： a temperature of 30 ℃, an EIL to oil mass ratio of 1：1, an extraction time of 30 min, and a settling time of 120 min, while the basic nitrogen content in diesel dropped from 580 μg/g to 37 gg/g. In addition, the efficiency for extraction of basic N-compounds could still reach 62.9% at am EIL/oil mass ratio of 1：7 after four recycles of the EIL.

关键词： eutectic ionic liquid tetraethyl ammonium bromide-malonic acid denitrogenation basic nitrogen coker diesel

New method for camera pose estimation based on line correspondence

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Science China(Technological Sciences) 2013年第11期56卷 2787-2797页

作者： liu jinbo ZHANG XiaoHu liu HaiBo YUAN Yun ZHU ZhaoKun YU QiFeng College of Aerospace Science and Engineering National University of Defense Technology Hunan Key Laboratory of Videometrics and Vision Navigation

The key technology of the measuring method of pose shaking of unstable platform based on CCD lies in the camera pose estimation. A new method for camera pose estimation based on line correspondence is put forward in this paper. First, two appro- priate lines are selected in the space to establish a local coordinate system, the remaining lines form three-line sets with these two lines respectively and then the angle depth of the lines of the local coordinate system can be obtained by using the linearity of interpretation plane; then the invariance of included angle between spatial coordinate system and camera coordinate system during rigid transformation is used to establish a constraint equation set of angle depth of three lines similar to traditional P3P, and the corresponding angle depth of the third line in the set can be obtained linearly by variable substitution; finally, the rota- tion matrix can be expressed with quaternion and the pose parameters of camera in the space can be calculated by singular value decomposition （SVD）. The static experiment and dynamic experiment verify the accuracy and stability of the algorithm and that the camera pose shocking is within 1~ and the 3a error is superior to 0.3＇. The method in this paper can be directly used in the micro-vibration measurement of experimental platform and robot navigation and other fields and is of important theoretical significance and engineering application prospect.

关键词： unstable platform measurement of pose shaking line correspondence angle depth quaternion

Correction method for non-landing measuring of vehicle-mounted theodolite based on static datum conversion

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Science China(Technological Sciences) 2013年第9期56卷 2268-2277页

During the non-landing measuring of vehicle mounted theodolite, especially under high-speed tracking measurement, the misalignment of theodolite's center of mass and spindle etc. will cause high-frequency vibration of theodolite platform, increase the observation error of targets and even unbelievable results. In this paper, a correction method of non-landing measuring of theodolite based on static datum conversion is presented, which can effectively improve the observation accuracy of theodolite. The CCD camera is fixed to the theodolite platform to calculate the gesture shaking quantity of theodolite platform in geodetic coordinate system through the real time imaging of static datum. The observation results of theodolite are corrected by using such shaking quantity. The experiment shows that the correction accuracy exceeds 10 s of arc. The intrinsic parameter calibration technology of camera based on stellar angular distance and absolute conic put forward in this paper can prevent the estimated error of extrinsic parameters influencing the intrinsic parameter calibration and improve the intrinsic parameter calibration accuracy; the static datum conversion technology can reduce the influence of installation error of camera and theodolite platform on gesture measuring of the platform. The simulation experiment shows that when the shaking range of the platform is less than 30 min of arc, the influence of the three-axis installation error of camera within 3deg on the accuracy of correction results is less than 8 s of arc. The method in this paper can be extended to and used in the field of gesture shaking measuring and micro-structure deformation of various unstable platforms, therefore it is of important theoretical research significance and has wide engineering application prospect.

关键词： vehicle-mounted theodolite non-landing Measuring error correction static datum conversion decoupling calibration

Effects of extracellular vesicle-derived noncoding RNAs on pre-metastatic niche and tumor progression

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Genes & Diseases 2024年第1期11卷 176-188页

作者： Zhuang Chen Qiming Wang jinbo liu Wenkang Wang Weitang Yuan Yang liu Zhenqiang Sun Chengzeng Wang Department of Colorectal Surgery The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan 450052China Academy of Medical Sciences of Zhengzhou University ZhengzhouHenan 450001China Department of Internal Medicine Affiliated Cancer Hospital of Zhengzhou UniversityHenan Cancer HospitalZhengzhouHenan 450008China Department of Breast Surgery The First Affliated Hospital of Zhengzhou UniversityZhengzhouHenan 450052China Department of Radiotherapy Affiliated Cancer Hospital of Zhengzhou UniversityHenan Cancer HospitalZhengzhouHenan 450008China The First Affiliated Hospital of Zhengzhou University ZhengzhouHenan 450052China

A pre-metastatic niche(PMN)is a protective microenvironment that facilitates the colonization of disseminating tumor cells in future metastatic *** vesicles(EVs)play a role in intercellular communication by delivering cargoes,such as noncoding RNAs(ncRNAs).The pivotal role of extracellular vesicle-derived noncoding RNAs(EV-ncRNAs)in the PMN has attracted increasing *** this review,we summarized the effects of EV-ncRNAs on the PMN in terms of immunosuppression,vascular permeability and angiogenesis,inflammation,metabolic reprogramming,and fibroblast *** particular,we provided a comprehensive overview of the effects of EV-ncRNAs on the PMN in different ***,we discussed the promising clinical applications of EV-ncRNAs,including their potential as diagnostic and prognostic markers and therapeutic targets.

关键词： Biomarker Extracellular vesicles Noncoding RNAs

An Experimental Study on the Pressure Distribution in Horizontal Gas Wells

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Fluid Dynamics & Materials Processing 2020年第6期16卷 176-191页

作者： jinbo liu Ziheng Jiang Xuezhang Feng Ruiquan Liao Dianfang Feng Xingkai Zhang Hasimu Aikeremu No.1 Gas Production Plant of Xinjiang Oilfield Company Karamay834000China School of Petroleum Engineering Yangtze UniversityWuhan430100China

Laboratory experiments have been carried out to study the fluid flow in the wellbore of a horizontal gas well during the production *** related pressure distribution has been determined considering different cases(different inflow media,different perforation opening methods and different liquid holdup).It has been found that the larger the fluid flow rate,the greater the pressure changes in the wellbore under the same hole opening *** uniformity of the perforation opening method was also an important factor affecting the magnitude of the wellbore pressure *** liquid holdup also affected the pressure distribution,especially when the gas volumetric flow rate exceeded 200 m3/*** of the outcomes of the present experimental study with the predictions of a theoretical model available in the literature has provided a relative error smaller than 20%.

关键词： Horizontal gas well laboratory experiment pressure distribution

Life History and Control Measures of Dendrolimus sibiricus Tschetw. in Northeast China

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Plant Diseases and Pests 2022年第4期13卷 13-13,16页

作者： jinbo liu Benxi Forestry and Grassland Pest Control and Quarantine Workstation Benxi 117000China

In this paper, the life history of Dendrolimus sibiricus Tschetw. is studied, and the effective measures against the pest such as prediction, resource protection, biological control, light trapping and chemical contro... 详细信息

关键词： Larix gmelinii Dendrolimus sibiricus Control measures