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Weekly inter-technique combination of SLR,VLBI,GPS and DORIS at the solution level

Research in Astronomy and Astrophysics 2018年第10期18卷 5-18页

作者： li-zhen lian Jie-Xian Wang Cheng-li Huang Ming-Hui Xu College of Surveying and Geo-informatics Tongji UniversityShanghai 200092China CAS Key Laboratory of Planetary Sciences Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China University of Chinese Academy of Sciences Beijing 100049China

Constructing and maintaining a stable terrestrial reference frame （TRF） is one of the key objectives of fundamental astronomy and geodesy. The datum realization for all the global TRF versions, such as ITRF2014 and its predecessor ITRF2008, assumes linear time evolution for transformation parameters and then imposes some conditions on these Helmert transformation parameters. In this paper, we investigate a new approach, which is based on weekly estimation of station positions and Helmert transformation parameters from a combination of the solutions of four space-geodetic techniques, i.e., Satellite Laser Ranging （SLR）, Very Long Baseline Interferometry （VLBI）, Global Positioning System （GPS） and Doppler Orbitography and Radiopositioning Integrated by Satellite （DORIS）. For this study, an interval of one week is chosen because the arc length of the SLR solutions is seven days. The major advantage of this weekly estimated reference frame is that both the non-linear station motions and the non-linear origin motion are implicitly taken into account. In order to study the non-linear behavior of station motions and physical parameters, ITRF2008 is used as a reference. As for datum definition of weekly reference frame, on one hand SLR is the unique technique to realize the origin and determine the scale together with VLBI, and on the other hand the orientation is realized via no net rotation with respect to ITRF2005 on a subset of core stations. Given the fact that without enough collocations an inter-technique combined TRF could not exist, the selection and relative weight of local ties surveyed at co-location sites are critical issues. To get stable results, we first assume that, if there were no events such as equipment changes between the measurement epoch of the local tie and that of the space- geodetic solution, the relative position between the two co-located stations should be invariant and this local tie could be used for computing the inter-technique combined ref

关键词： reference systems - astrometry - methods data analysis - Earth

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中国心血管病研究 2024年第7期22卷 623-628页

作者：李振莲史苏娜杨柳任振芳朱凌凌邢台市中心医院心血管内科河北省邢台市054000

目的分析微小RNA(miR)-21-5p与血清C反应蛋白(CRP)、B型利钠肽(BNP)、中性粒细胞/淋巴细胞(N/L)、D-二聚体(D-D)对阵发性心房颤动(房颤)患者射频消融复发的预测价值。方法选择2020年1月至2021年1月邢台市中心医院心血管内科收治的120例... 详细信息

目的分析微小RNA(miR)-21-5p与血清C反应蛋白(CRP)、B型利钠肽(BNP)、中性粒细胞/淋巴细胞(N/L)、D-二聚体(D-D)对阵发性心房颤动(房颤)患者射频消融复发的预测价值。方法选择2020年1月至2021年1月邢台市中心医院心血管内科收治的120例首次行射频消融术的阵发性房颤患者作为本次的研究对象,根据随访时是否复发分为复发组50例,未复发组70例,另招募同期健康志愿者60例成立对照组,比较各组患者miR-21-5p与炎性因子水平,并分析两者之间的相关性,探究其对阵发性房颤患者射频消融复发的预测价值。结果复发组及未复发组患者血清miR-21-5p水平显著高于对照组,复发组患者血清miR-21-5p水平显著高于未复发组(F=1079.07,P<0.05)。复发组及未复发组患者血清CRP、BNP、N/L水平显著高于对照组,且复发组显著高于未复发组;复发组及未复发组患者血清D-二聚体水平显著低于对照组,且复发组更低;复发组与未复发组左心房前后径(LAD)、舒张早期二尖瓣口血流速度峰值/环根部侧壁运动速度峰值(E/Ea)数值显著高于对照组,且复发组显著高于未复发组[(35.37±2.76)mm比(34.18±2.54)mm比(33.26±2.32)mm,P<0.05];但复发组与未复发组左心房射血分数(LAEF)和收缩期左心房峰值应变率(LASRs)显著低于对照组,复发组更低[LAEF:(0.34±0.08)比(0.48±0.09)比(0.57±0.09),LASRs(1.64±0.37)/s比(1.98±0.43)/s比(3.53±0.51)/s,P<0.05];多因素logistic回归分析提示,D-二聚体、BNP、LAD、E/Ea比值升高是持续性房颤复发的独立危险因素;Pearson法分析阵发性房颤患者血清miR-21-5p水平与CRP、N/L、BNP呈正相关,而与D-二聚体呈负相关(r=0.423,0.271,-0.412,0.325,P均<0.05);受试者工作特征曲线(ROC)研究结果可知,血清miR-21-5p相对表达水平AUC为0.924。血清CRP、BNP、N/L、D-二聚体AUC分别为0.823、0.815、0.733、0.685(P<0.05)。结论血清miR-21-5p在阵发性房颤射频消融复发患者中显著升高,且与血清CRP、N/L、D-二聚体、BNP水平显著相关,对阵发性房颤射频消融患者复发具有一定的诊断价值。

关键词： miR-21-5p 血清CRP BNP N/L D-Dimer 阵发性心房颤动射频消融相关性分析

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Biomimetic design of highly flexible metal oxide nanofibrous membranes with exceptional mechanical performance for superior phosphopeptide enrichment

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Nano Research 2024年第5期17卷 4270-4278页

作者： Xue Mao zhen-zhen li Dong-lian Hao Wei-Dong Han Gao-Peng li Yao-Yu Wang Kun Zhang School of Textile Science and Engineering Key Laboratory of Functional Textile Material and Product(Ministry of Education)Xi’an Polytechnic UniversityXi’an 710048China Key Laboratory of Magnetic Molecules&Magnetic Information Materials of the Ministry of Education School of Chemistry&Material ScienceShanxi Normal UniversityTaiyuan 030031China Department of Clinical Laboratory The Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710004China Shanghai iProteome Biotechnology Co. LtdShanghai 201210China College of Chemistry&Materials Science Northwest UniversityXi'an 710127China

Developing free-standing and mechanical robust membrane materials capable of superior enrichment of phosphopeptides for analyzing and identifying the specific phosphoproteome of cancer cells is significant in understanding the molecular mechanisms of cancer development and exploring new therapeutic approaches,but still a significant challenge in materials *** this end,we firstly constructed highly flexible ZrTiO_(4) nanofibrous membranes(NFMs)with excellent mechanical stability through a cost-effective and scalable electrospinning and subsequent calcination ***,to further increase the enrichment capacity of the phosphopeptide,the biomimetic TiO_(2)@ZrTiO_(4) NFMs with root hair or leaf like branch microstructure are developed by the hydrothermal post-synthetic modification of ZrTiO_(4) NFMs through growing unfurling TiO_(2) nanosheets onto the ZrTiO_(4) ***,remarkable flexibility and mechanical stability enable the resulting TiO_(2)@ZrTiO_(4) NFMs excellent practicability,while the biomimetic microstructure allows it outstanding enrichment ability of the phosphopeptide and identification ability of the specific phosphoproteins in the digest of cervical cancer ***,6770 phosphopeptides can be enriched by TiO_(2)@ZrTiO_(4) NFMs(2205 corresponding phosphoproteins can be identified),and the value is much higher than that of ZrTiO_(4) NFMs(6399 phosphopeptides and 2132 identified phosphoproteins)and commercial high-performance TiO_(2) particles(4525 phosphopeptides and 1811 identified phosphoproteins).These results demonstrate the super ability of TiO_(2)@ZrTiO_(4) NFMs in phosphopeptide enrichment and great potential for exploring the pathogenesis of cancer.

关键词： inorganic nanofibers flexible ceramic nanofibrous membranes biomimetic materials exceptional mechanical performance flexibility

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黄精软糖的制备及其工艺优化

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湖北农业科学 2024年第10期63卷 131-135,141页

作者：樊淑淼李嘉瑜焦佳音郑芸霏胡继仑李连珍李娟洪利亚河南农业大学农学院郑州450046

以明胶添加量、黄精浆添加量、白砂糖添加量及苹果酸-柠檬酸添加量比例进行单因素试验,综合感官评价为考察指标,确定黄精(Polygonatum sibiricum)软糖相关加工参数,在单因素试验基础上,结合Box-Behnken响应面法设计三因素三水平进行17... 详细信息

以明胶添加量、黄精浆添加量、白砂糖添加量及苹果酸-柠檬酸添加量比例进行单因素试验,综合感官评价为考察指标,确定黄精(Polygonatum sibiricum)软糖相关加工参数,在单因素试验基础上,结合Box-Behnken响应面法设计三因素三水平进行17组处理,优化黄精软糖加工工艺。结果表明,黄精软糖的最佳制备条件为明胶添加量3.00%、黄精浆添加量30.00%、白砂糖添加量15.00%、苹果酸-柠檬酸添加量比例1∶2,此时感官评分最高为86.69分,与理论值接近。该工艺配方条件下制备的黄精软糖具有独特的黄精风味,酸甜适宜,金黄透亮,弹性和咀嚼度最佳,并保留了黄精较多的营养价值,为黄精功能性软糖的开发提供新思路。

关键词：黄精(Polygonatum sibiricum) 软糖单因素响应面法制备工艺

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Experimental Study on Vortex-Induced Vibration of Rough Risers Coupling with Interference Effect in Tandem Arrangement

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China Ocean Engineering 2024年第3期38卷 394-407页

作者： HU Ze-bo liU zhen li Peng GUO Hai-yan REN Xiao-hui HOU Hao HAO lian-hong College of Civil Engineering and Architecture Shandong University of Science and TechnologyQingdao 266590China Qingdao Key Laboratory of Marine Civil Engineering Materials and Structures Qingdao 266590China College of Engineering Ocean University of ChinaQingdao 266100China

In order to study the response law of vortex-induced vibration(VIV)of marine risers under the combined action of roughness and interference effects,and to reveal the coupling mechanism of roughness and interference effects on the riser,a VIV experiment of rough risers in tandem arrangement was conducted in a wave−current combined *** experiment characterized the risers’roughness by arranging different specifications of attachments on the surface of the *** rough risers with different roughness and smooth risers were arranged in tandem arrangement,with the rough risers arranged *** experimental results indicate that the suppression of the attachments on the downstream risers’vibration are more significant both in the CF and IL directions as the reduced velocity *** the downstream riser,the amplitude response of rough riser is more significantly weakened compared with the smooth one at high reduced *** the upstream risers,changes in the roughness and spacing ratio have an impact on their‘lock-in’*** the roughness of downstream risers is relatively large(0.1300)and the spacing between risers is small(S/D=4.0),the reduced velocity range of‘lock-in’region in the CF direction of upstream risers is obviously expanded,and the displacement in the‘lock-in’region is severer.

关键词： marine riser vortex-induced vibration tandem arrangement roughness interference effect

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Novel intelligent reasoning system for tool wear prediction and parameter optimization in intelligent milling

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Advances in Manufacturing 2024年第1期12卷 76-93页

作者： Long-Hua Xu Chuan-zhen Huang zhen Wang Han-lian liu Shui-Quan Huang Jun Wang School of Mechanical Engineering Yanshan UniversityQinhuangdao066004HebeiPeople’s Republic of China Center for Advanced Jet Engineering Technologies(CaJET) Key Laboratory of High-efficiency and Clean Mechanical Manufacture(Ministry of Education)National Experimental Teaching Demonstration Center for Mechanical Engineering(Shandong University)School of Mechanical EngineeringShandong UniversityJinan250061People’s Republic of China Institute of Manufacturing Technology Guangdong University of TechnologyGuangzhou510006People’s Republic of China

Accurate intelligent reasoning systems are vital for intelligent *** this study,a new intelligent reasoning system was developed for milling processes to accurately predict tool wear and dynamically optimize machining *** developed system consists of a self-learning algorithm with an improved particle swarm optimization(IPSO)learning algorithm,prediction model determined by an improved case-based reasoning(ICBR)method,and optimization model containing an improved adaptive neural fuzzy inference system(IANFIS)and *** results showed that the IPSO algorithm exhibited the best global convergence *** ICBR method was observed to have a better performance in predicting tool wear than standard CBR *** IANFIS model,in combination with IPSO,enabled the optimization of multiple objectives,thus generating optimal milling *** paper offers a practical approach to developing accurate intelligent reasoning systems for sustainable and intelligent manufacturing.

关键词： Improved particle swarm optimization(IPSO)algorithm Improved case-based reasoning(ICBR)method Adaptive neural fuzzy inference system(ANFIS)model Tool wear prediction Intelligent manufacturing

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Prediction of cell-cell communication patierns of dorsal root ganglion cells:single-cell RNA sequencing data analysis

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Neural Regeneration Research 2024年第6期19卷 1367-1374页

作者： Yanna lian Cheng Wu li liu Xiangyao li National Health Commission and Chinese Academy of Medical Sciences Key Laboratory of Medical Neurobiology Ministry of Education Frontier Science Center for Brain Research and Brain-Machine IntegrationSchool of Brain Science and Brain MedicineZhejiang UniversityHangzhouZhejiang ProvinceChina International Institutes of Medicine the Fourth Affiliated Hospital of Zhejiang University School of MedicineYiwuZhejiang ProvinceChina Zhejiang University-University of Edinburgh Institute Zhejiang University School of MedicineZhejiang UniversityHainingZhejiang ProvinceChina Biomedical Sciences College of Medicine and Veterinary MedicineThe University of EdinburghEdinburghUK Core Facilities of the School of Medicine Zhejiang UniversityHangzhouZhejiang ProvinceChina

Dorsal root ganglion neurons transmit peripheral somatic information to the central nervous system,and dorsal root ganglion neuron excitability affects pain *** root ganglion stimulation is a new approach for managing pain *** of the cell-cell communication among dorsal root ganglion cells may help in the development of new pain and itch management ***,we used the single-cell RNA-sequencing(scRNA-seq)database to investigate intercellular communication networks among dorsal root ganglion *** collected scRNA-seq data from six samples from three studies,yielding data on a total of 17,766 *** on genetic profiles,we identified satellite glial cells,Schwann cells,neurons,vascular endothelial cells,immune cells,fibroblasts,and vascular smooth muscle *** analysis revealed that eight types of dorsal root ganglion neurons mediated proprioceptive,itch,touch,mechanical,heat,and cold ***,we predicted several distinct forms of intercellular communication among dorsal root ganglion cells,including cell-cell contact,secreted signals,extracellular matrix,and neurotransmitter-mediated *** data mining predicted that Mrgpra3-positive neurons robustly express the genes encoding the adenosine Adora2b(A2B)receptor and glial cell line-derived neurotrophic factor family receptor alpha 1(GFRα-1).Our immunohistochemistry results confirmed the coexpression of the A2B receptor and GFRα-*** injection of the A2B receptor antagonist PSB-603 effectively prevented histamine-induced scratching behaviour in a dose-dependent *** results demonstrate the involvement of the A2B receptor in the modulation of itch ***,our findings provide insight into dorsal root ganglion cell-cell communication patterns and *** results should contribute to the development of new strategies for the regulation of dorsal root ganglion excitability.

关键词： cell-cell communications CellChat dorsal root ganglion scRNA-Seq database

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Al-modified yolk-shell silica particle-supported NiMo catalysts for ultradeep hydrodesulfurization of dibenzothiophene and 4,6-dimethyldibenzothiophene:Efficient accessibility of active sites and suitable acidity

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Petroleum Science 2024年第1期21卷 654-666页

作者： Ke Yu Wei-Min Kong zhen Zhao Ai-Jun Duan lian Kong Xi-Long Wang State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing102249China Institute of Catalysis for Energy and Environment College of Chemistry and Chemical EngineeringShenyang Normal UniversityShenyang 110034LiaoningChina

Yolk-shell SiO2 particles(YP)with center-radial meso-channels were fabricated through a simple and effective ***-containing YP-supported NiMo catalysts with different Al amounts(NiMo/AYP-x,x=Si/Al molar proportion)were prepared and dibenzothiophene(DBT)and 4,6-dimethyl-dibenzothiophene(4,6-DMDBT)were employed as the probes to evaluate the hydrodesulfurization(HDS)catalytic *** as-prepared AYP-x carriers and corresponding catalysts were characterized by some advanced characterizations to obtain deeper correlations between physicochemical properties and the HDS *** average pore sizes of series AYP-x supports are above 6.0 nm,which favors the mass transfer of organic *** cavity between the yolk and the shell is beneficial for the enrichment of S-containing compounds and the accessibility between reactants and active *** embedded into the silica framework could facilitate the formation of Lewis(L)and Brønsted(B)acid sites and adjust the metal-support interaction(MSI).Among all the as-synthesized catalysts,NiMo/AYP-20 catalyst shows the highest HDS *** improved HDS activity of NiMo/AYP-20 catalyst is attributed to the perfect combination of excellent structural properties of the yolk-shell mesoporous silica,enhanced acidity,moderate MSI,and good accessibility/dispersion of active components.

关键词： Al-containing yolk-shell silica particles Accessibility Acidity Metal-support interaction Hydrodesulfurization

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Direct suprafacial 1,3-hydrogen migration of 1,1-dimethyl-2-(9-phenanthryl)cyclopropane

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Acta Chimica Sinica(English Edition) 1987年第4期5卷 338-344页

作者： WU Guo-Sheng MA Yun-Fei li zhen-lian Shanghai Institute of Organic Chemistry,Academia Sinica,ShanghaiXU Jian-Hua Department of Chemistry,Nanjing University,Nanjing Shanghai Institute of Organic Chemistry Academia Sinica Shanghai Department of Chemistry Nanjing University Nanjing

Irradiation of the title compound with two D-labeled methyl groups gave 2-methyl-d3-4-（9-phenanthryl）-1-butene-d3,which was eluciated on the bases of the spectral evidences andchemical *** on the discussions of MO following and bond order change betweenthe designed basis orbital pairs on excitation,the most reasonable ring-opening mode of the titlecompound appeared to be the direct suprafacial 1,3-hydrogen migration.

关键词： Direct suprafacial 1,3-hydrogen migration of 1,1-dimethyl-2 phenanthryl)cyclopropane

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CoFe_(2)O_(4) decorated graphene/C_(18)-functionalized mesoporous silica nanocomposites prepared for magnetic enrichment and electrochemical detection of promethazine in beef

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Chinese Chemical Letters 2024年第3期35卷 208-213页

作者： Xingdong Yang Shi-Ming Ying Sen Zhang Jinxia Dai Wei Gao Tian-Qi Wang Jun-Qin Qiao Hong-zhen lian li Mao State Key Laboratory of Analytical Chemistry for life Science School of Chemistry&Chemical Engineering and Centre of Materials AnalysisNanjing UniversityNanjing 210023China Ministry of Education(MOE)Key Laboratory of Modern Toxicology School of Public HealthNanjing Medical UniversityNanjing 211166China

Promethazine(PHZ)is used as a sedative in veterinary medicine,and its residue can threaten the health of *** electrochemical detection of PHZ is suitable method for application in the ***,the traditional electroanalysis is difficult to perform directly in meat samples due to matrix *** work integrates magnetic solid-phase extraction and differential pulse voltammetry for highly sensitive and selective determination of PHZ in beef and beef liver for the first ***_(2)O_(4)/graphene coated with C_(18)-functionalized mesoporous silica(MG@mSiO_(2)-C_(18))is synthesized as dispersed magnetic adsorbent to extract *** glassy carbon electrode modified with nitrogen-doped hollow carbon microspheres(HCM)attracts the MG@mSiO_(2)-C_(18)with PHZ,and directly detects the PHZ without elution ***@mSiO_(2)-C_(18)can separate PHZ to avoid the interference of impurities on following detection,and also concentrate PHZ on magnetic ***,the electrode modification with HCM can amplify the electrochemical signal of ***,the integrated PHZ determination method exhibits a wide linear range from 0.08μmol/L to 300μmol/L with a low limit of detection of 9.8 nmol/*** beef sample analysis presents excellent recovery,demonstrating that this protocol is promising for the rapid and onsite detection of PHZ in real meat samples。

关键词： Promethazine(PHZ) Drug residue Magnetic solid phase extraction Electrochemical detection Beef

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