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Performance measurement and evaluation of an ionic liquid electrospray thruster

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Chinese Journal of Aeronautics 2023年第3期36卷 1-15页

作者： Chengjin HUAnG Jianling LI mu LI School of Power and Energy Northwestern Polytechnical UniversityXi’an 710072China Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology Center for Advanced Material Diagnostic Technologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118China

As a novel micro-propulsion system for small satellites(from micro to nano),the ionic liquid electro spray propulsion system is a promising ***,performance measurement and evaluation of the Ionic Liquid Electrospray Thruster(ILET)is one of the most challenging issues for practical application,due to the difficulties in the development of a prototype and direct measurements of micro-thrust and small flow *** address this issue,a Modular Ionic Liquid Electrospray Thruster(MILET)prototype is constructed,and a diagnostic system for thrust and mass flow rate is specially developed based on an analytical balance *** the ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate as the propellant,a series of experiments is carried out on the MILET prototype under a wide operating condition through changing the applied voltage to control the *** different applied voltages,the thrust and the mass flow rate of the propellant are directly *** propulsive performance parameters of the thruster,such as thrust,specific impulse,thrust-to-power ratio,thruster efficiency,etc.,are comprehensively ***,a performance comparison is made between the MILET and other representative *** a relatively low applied voltage ranging from 1550 V to 2000 V,the MILET achieves a quasi-constant specific impulse of 1263 s with the averaged thrust-to-power ratio of 65.2μn/W and thruster efficiency of 40.7%.The performance of ILET is also compared with other typical electric *** results demonstrate that the ILET exhibits an excellent ability of minimalization with high specific impulse and thruster efficiency,which guarantees a great superiority in micro ***,the ways to further improve the performance of ILET are discussed,which further confirms the potential prospect of *** present result helps to advance the development and application of ILET.

关键词： Electrospray thruster Ionic liquids Performance measurement Performance estimation Micro-propulsion

Investigation of kinetics in bioaugmentation of crude oil via high-throughput sequencing: Enzymatic activities, bacterial community composition and functions

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Petroleum Science 2022年第4期19卷 1905-1914页

作者： Yong-Rui Pi mu-Tai Bao School of Ocean Yantai UniversityYantai264005China Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education/Institute for Advanced Ocean StudyOcean University of China Qingdao266100China

The enzymes and the characteristics of the community of the petroleum-degrading bacteria play a crucial role in the crude oil biodegradation. The prediction of kinetics of the key groups of hydrocarbons in crude oil was important to evaluate the bioremediation speed and constant. Most of the n-alkanes(C9-C29) were degraded in 25 days, and the average degradation rates of C_(18)~C_(27) higher than 100 μg g^(-1) d^(-1).The hopanes, such as H_(30), had a biodegradation rate more than 10 μg g^(-1) d^(-1). The related enzymes activities changed along with the crude oil biodegradation, especially dehydrogenase. The 16 S rRnA gene amplicon sequencing revealed that Proteobacteria, Firmcutes, Bacteroidetes, Actinobacteria, Acidobacteria were the main petroleum hydrocarbon degraders during the crude oil biodegradation, and the top two highest relative abundance of the genera were Alcaligenes and Acinetobacter. Acinetobacter presented positive correlation to biodegradation of n-alkanes and PAHs. Based on COG analysis, the largest group involved in the general function was amino acid transport and metabolism. The functional categories of bacterial communities were mainly focused on the carbohydrate and amino acid metabolism, xenobiotics biodegradation and metabolism, membrane transport, and so on. Overall, these findings highlight the potential guideline for more adequate monitoring of microbial degradation of crude oil.

关键词： Crude oil Bioaugmentation Kinetics Enzyme activities Microbial functions

A note on the Cartan Type Lie Superalgebra S（n） over a Field of Positive Characteristic

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Algebra Colloquium 2014年第3期21卷 521-526页

作者： Li Ren Qiang mu Mathematical College Sichuan University Chengdu 610064 China School of Mathematical Sciences Harbin Normal University Harbin 150025 China

The main result of this paper is that every derivation of the finite-dimensional simple modular Lie superalgebra S（n） is inner, and S（n） has no nonsingular associative form.

关键词： modular Lie superalgebra simple Lie superalgebra derivation associativeform

系统性硬化症合并干燥综合征的临床特征分析及危险因素研究

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中国全科医学 2025年第6期28卷 737-741,750页

作者：邹松炎张日伊李孝东穆银玉浙江省宁波市医疗中心李惠利医院检验科 315040

背景系统性硬化症(SSc)是异质性疾病,常同时合并干燥综合征(SS),SSc患者部分症状与SS相似,临床诊治过程中容易漏诊SS。目的探讨SSc合并SS患者的临床和实验室特点及重叠发病的危险因素。方法回顾性纳入2019—2023年在宁波市医疗中心李惠... 详细信息

背景系统性硬化症(SSc)是异质性疾病,常同时合并干燥综合征(SS),SSc患者部分症状与SS相似,临床诊治过程中容易漏诊SS。目的探讨SSc合并SS患者的临床和实验室特点及重叠发病的危险因素。方法回顾性纳入2019—2023年在宁波市医疗中心李惠利医院住院治疗的SSc患者为研究对象,收集患者基线资料和实验室检查结果。依据是否合并SS将患者分为SSc组(n=91)和SSc合并SS组(n=36)。采用多因素Logistic回归分析探究SSc合并SS的危险因素。结果SSc合并SS组患者女性比例、病程、血液受累、局限性皮肤型SSc(lcSSc)、自身免疫性肝病比例高于SSc组,肺部受累比例、环磷酰胺使用比例低于SSc组(PnP-B抗体)、抗干燥综合征A/Ro52抗体(抗SSA/Ro52抗体)、抗干燥综合征A/Ro60抗体(抗SSA/Ro60抗体)、抗干燥综合征B抗体(抗SSB抗体)、抗线粒体M2抗体(AMA-M2)检出率高于SSc组(PnP-B抗体阳性(OR=11.681,95%CI=1.662~82.097)是SSc合并SS的独立危险因素(PnP-B抗体阳性并出现相应临床症状时,应进行唇腺活检等系统全面的检查,以防漏诊。

关键词：硬皮病,系统性系统性硬化症干燥综合征临床特点实验室特点危险因素

On strong structural controllability and observability of linear time-varying systems: a constructive method

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Science China(Information Sciences) 2019年第1期62卷 134-147页

作者： Shaoyuan LI Jianbin mu Yishi WAnG Department of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Ministry of Education of China

In this paper, we consider the controllability and observability of generalized linear time-varying(LTV) systems whose coefficients are not exactly known. All that is known about these systems is the placement of non-zero entries in their coefficient matrices(A, B). We provide the characterizations in order to judge whether the placements can guarantee the controllability/observability of such LTV systems, regardless of the exact value of each non-zero coefficient. We also present a direct and efficient algorithm with an associated time cost of O (n+m+ν) to verify the conditions of our characterizations, where n and m denote the number of columns of A and B, respectively, and ν is number of non-zero entries in(A, B).

关键词： linear time-varying(LTV) systems strong structural properties controllability observability duality

Evolution of Ultrastrong Langmuir Turbulence

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Chinese Physics Letters 1991年第1期8卷 13-16页

作者： mu Jianlin CAI Shidong CCAST-World Laboratory and Institute of Physics Academia SinicaBeijing 100080

We report here our recent studies of ultrastrong Langmuir iubulence by numerical simulation in two-fluid *** nonlinear phenomena,such as the formation and collapse of solitons,the onset of wavebreaking,the burnout and reborn of cavitons and so on,are observed in the *** intense cavitons(|E|^(2)/2coTa≈3 and δn/n0≈0.3) caused by relative weak pump0(|E|^(2)/2coTa≈0.05) and fluctuations (δnc/n0≈0.003) can exist in the system which are beyond the approximation of the Zakhorov model.

关键词： breaking intense approximation

Splitting of the virtual class for genus one stable quasimaps

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Science China Mathematics 2024年第12期67卷 2681-2700页

作者： Sanghyeon Lee mu-Lin Li Shanghai Center for Mathematical Sciences Fudan UniversityShanghai 200438China School of Mathematics Hunan UniversityChangsha 410012China

We analyze the local structure of the moduli space of genus one stable *** it with the p-fields theory developed by Chang and Li(2020),we prove the splitting formula for the virtual cycle of stable quasimaps to comple... 详细信息

关键词： stable quasimaps virtual cycles moduli stack deformation theory

Human immunodeficiency virus type-1 induces a regulatory B cell-like phenotype in vitro

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Cellular & Molecular Immunology 2018年第10期15卷 917-933页

作者： Jacobo Lopez-Abente Adrián Prieto-Sanchez Maria-Ángeles muñoz-Fernandez Rafael Correa-Rocha Marjorie Pion Laboratorio de Inmuno-Regulación Immunology DepartmentPabellón de Medicina y Cirugía ExperimentalHospital General Universitario Gregorio MarañónInstituto de Investigación Sanitaria Gregorio Marañón(IiSGM)Calle Máiquez9Madrid 28009Spain Laboratorio de Inmuno-Biología Molecular Immunology DepartmentHospital General Universitario Gregorio MarañónInstituto de Investigación Sanitaria Gregorio Marañón(IiSGM)C/Dr.Esquerdo 46Madrid 28007Spain networking Research Center on Bioengineering Biomaterials and Nanomedicine(CIBER-BBN)C/Monforte de Lemos 3-5Pabellón 11Madrid 28029Spain

Individuals infected with human immunodeficiency virus type-1(HIV-1)usually show a general dysregulation and hyper-activation of the immune system.A direct influence of HIV-1 particles on B-cell phenotypes and functions has been previously ***,the consequences of B-cell dysregulation are still poorly *** evaluated the phenotypic changes in primary B cells after direct contact with HIV-1 particles in comparison with different types of *** functionality of treated B cells was challenged in co-culture experiments with autologous CD4+and CD8+T *** demonstrated that HIV-1 induces a phenotypic change in B cells towards a regulatory B-cell phenotype,showing a higher level of IL-10,TGF-β1,EBI3 or IL-12(p35)mRnA expression and acquiring an immunosuppressive *** acquisition of a Breg phenotype was confirmed by co-culture experiments where HIVtreated B cells reduced the proliferation and the TnFαproduction of CD4+or CD8+T *** suppressive ability of HIV-treated B cells was dependent on cell-to-cell contact between these B cells and effector *** our knowledge,these data provide the first evidence that HIV-1 can directly induce a regulatory B cell-like immunosuppressive phenotype,which could have the ability to impair specific immune *** dysregulation could constitute one of the mechanisms underlying unsuccessful efforts to develop an efficient vaccine against HIV-1.

关键词： HIV-1 immune hyper-activation regulatory B cells

Improvements on the upper-ocean simulation from 2007 to 2018 in the Canada Basin

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Advances in Climate Change Research 2022年第2期13卷 196-204页

作者： Long-Jiang mu Xiao-Yu WAnG Pilot national Laboratory for Marine Science and Technology(Qingdao) Qingdao 266237China Frontier Science Center for Deep Ocean multispheres and Earth System(FDOMES) Physical Oceanography LaboratoryOcean University of ChinaQingdao 266100China

The Beaufort Gyre reserves most of the freshwater in the Arctic *** shows that the freshwater content over 2016-2018 far exceeds the level over the plateau period *** the vertical temperature and salinity structure and their changes in the Beaufort Gyre is a way to understand the process related to such step *** configured a pan-Arctic sea ice-ocean model with a southern boundary at∼7°n in the Atlantic *** numerical simulation with sea surface salinity restoring,a latitude dependent horizontal diffusivity scaled by the squared buoyancy frequency,and a weak vertical diffusivity of 5×10^(−7) m^(2)s^(−1) in the Arctic Ocean better reproduces the sea ice extent,the Pacific summer halocline water,and the freshwater variations as *** sea surface salinity restoring mitigates the surface desalination in the north Atlantic Ocean,therefore a weaker ocean stratification prevents the excessive warming in the intermediate Arctic *** is also found that the weak vertical background diffusivity is the major factor in our model to preserve the vertical ocean structure in the Canada Basin and also the step change of freshwater *** addition to resolving eddy activities in high resolution models,the success in our low resolution model suggests that tuning the vertical diffusivity serves as another approach to simulate the increasing freshwater content in the recent decade.

关键词： Beaufort Gyre numerical simulation Upper Arctic Ocean Freshwater content