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Explore innovative development of aero engine experimental platform and equipment

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International Journal of Technology Management 2015年第6期 12-14页

作者： liu ya liu Jun China Aviation Planning and Construction Development Co. Ltd.Beijing 100120 China

The experiment platform of the aeroengine badly needs to develope in the direction of the overall supporting, the database system management and the engineering practice. Experimental means such as the water, electricity and gas systems which support the operation of equipment, and multiple sets of engine components （the compressor, the turbine, the combustion chamber, the structural strength etc.） which support the experimental study of the engine also badly needs to improve in the direction of comprehensive monitoring and system integration to meet the needs of high efficient experiment and management. The experiment platform can make the experimental data and the experimental process be shared in different places in real time. Improving the collaborative ability of design and experiment, improving the automatic level of the experiment and so on all need the computer, the network and the professional and matching application system to support so as to guarantee the security, the stability and the reliability of the experiment, and reduce the risk of the experiment. This paper mainly discusses the main innovative exploration of experimental platform and equipment development about the current aeroengine.

关键词： Aeroengine Experimental Platform Informatization.

Posterior Reduction and Monosegmental Fusion with Intraoperative Three-dimensional Navigation System in the Treatment of High-grade Developmental Spondylolisthesis

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Chinese Medical Journal 2015年第7期128卷 865-870页

作者： Wei Tian Xiao-Guang Han Bo liu ya-Jun liu Da He Qiang Yuan Yun-Feng Xu Department of Spine Surgery Beijing Jishuitan Hospital Beijing 100035 China

Background： The treatment of high-grade developmental spondylolisthesis （HGDS） is still challenging and controversial. In this study, we investigated the efficacy of the posterior reduction and monosegmental fusion assisted by intraoperative three-dimensional （3D） navigation system in managing the HGDS. Methods： Thirteen consecutive HGDS patients were treated with posterior decompression, reduction and monosegmental fusion ofL5/S1, assisted by intraoperative 3D navigation system. The clinical and radiographic outcomes were evaluated, with a minimum follow-up of 2 years. The differences between the pre- and post-operative measures were statistically analyzed using a two-tailed, paired t-test. Results： At most recent follow-up, 12 patients were pain-free. Only l patient had moderate pain, There were no permanent neurological complications or pseudarthrosis. The magnetic resonance imaging showed that there was no obvious disc degeneration in the adjacent segment. All radiographic parameters were improved. Mean slippage improved from 63.2% before surgery to 12.2% after surgery and 11.0% at latest follow-up. Lumbar lordosis changed from preoperative 34.9 ± 13.3° to postoperative 50.4 ±9.9°, and 49.3 ± 7.8° at last follow-up. L5 incidence improved from 71.0 ± 11.3° to 54.0 ± 1 1.9° and did not change significantly at the last follow-up 53.±1 15.4°. While pelvic incidence remained unchanged, sacral slip significantly decreased from preoperative 32.7± 12.5° to postoperative 42.6 ± 9.8°and remained constant to the last follow-up 44.4 ± 6.9°. Pelvic tilt significantly decreased from 38.4±12.5° to 30.9± 8.1° and remained unchanged at the last fbllow-up 28.1± 11.2°. Conclusions： Posterior reduction and monosegmental fusion of L5/S1 assisted by intraoperative 3D navigation are an effective technique for managing high-grade dysplastic spondylolisthesis. A complete reduction of local deformity and excellent correction of overall sagittal balance can be achieved.

关键词： High-grade Developmental Spondylolisthesis Intraoperative Three-dimensional Navigation Neurological Complication Reduction: Spondylolisthesis

蜂窝状堇青石基CuO/Al_2O_3催化剂用于烟气同时脱硫脱硝的研究

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燃料化学学报 2004年第3期32卷 257-262页

作者：刘清雅刘振宇中国科学院山西煤炭化学研究所煤转化国家重点实验室山西太原030001

考察了制备参数及反应条件对蜂窝状堇青石基CuO Al2O3催化剂同时脱硫脱硝活性的影响。结果表明,添加碱金属可以提高脱硫活性,但由于促进NH3氧化而降低了脱硝活性。为了获得理想的同时脱硫脱硝活性,催化剂的适宜载铜量为6.0%,载钠量为2.0... 详细信息

考察了制备参数及反应条件对蜂窝状堇青石基CuO Al2O3催化剂同时脱硫脱硝活性的影响。结果表明,添加碱金属可以提高脱硫活性,但由于促进NH3氧化而降低了脱硝活性。为了获得理想的同时脱硫脱硝活性,催化剂的适宜载铜量为6.0%,载钠量为2.0%。随着反应温度从350℃升高到450℃,该催化剂的脱硫活性逐渐升高,再生后脱硫活性都有所下降,但仍具有活性随温度升高而升高的趋势,说明脱硫过程为反应控制型;但由于温度升高,NH3氧化加剧,脱硝活性逐渐降低,所以适宜操作温度为400℃。在1450h-1～3600h-1范围内,空速对脱硝活性影响不大,对脱硫活性影响较大。对于再生催化剂,当空速由3600h-1降低到2300h-1时,硫容(SO2转化率达80%时单位质量催化剂所吸附的SO2量)不断增加,继续降低空速时硫容基本保持不变,所以适宜操作空速为2300h-1以下。

关键词：蜂窝状堇青石 CuO/Al2O3 烟气脱硫脱硝

Comparative proteomic analysis of plasma exosomes reveals the functional contribution of N-acetyl-alpha-glucosaminidase to Parkinson’s disease

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Neural Regeneration Research 2025年第10期20卷 2998-3012页

作者： Yuan Zhao Yidan Zhang Xin liu Jian Zhang ya Gao Shuyue Li Cui Chang Xiang liu Guofeng yang Department of Geriatrics Second Hospital of Hebei Medical UniversityShijiazhuangHebei ProvinceChina Department of Neurosurgery The Second Hospital of Hebei Medical UniversityShijiazhuangHebei ProvinceChina

Parkinson’s disease is the second most common progressive neurodegenerative disorder,and few reliable biomarkers are available to track disease *** proteins,DNA,mRNA,and lipids carried by exosomes reflect intracellular changes,and thus can serve as biomarkers for a variety of *** this study,we investigated alterations in the protein content of plasma exosomes derived from patients with Parkinson’s disease and the potential therapeutic roles of these proteins in Parkinson’s *** a tandem mass tag-based quantitative proteomics approach,we characterized the proteomes of plasma exosomes derived from individual patients,identified exosomal protein signatures specific to patients with Parkinson’s disease,and identified N-acetyl-alpha-glucosaminidase as a differentially expressed protein.N-acetyl-alpha-glucosaminidase expression levels in exosomes from the plasma of patients and healthy controls were validated by enzyme-linked immunosorbent assay and western *** results demonstrated that the exosomal N-acetyl-alpha-glucosaminidase concentration was not only lower in Parkinson’s disease,but also decreased with increasing Hoehn-yahr stage,suggesting that N-acetyl-alpha-glucosaminidase could be used to rapidly evaluate Parkinson’s disease ***,western blot and immunohistochemistry analysis showed that N-acetyl-alpha-glucosaminidase levels were markedly reduced both in cells treated with 1-methyl-4-phenylpyridinium and cells overexpressingα-synuclein compared with control ***,N-acetyl-alpha-glucosaminidase overexpression significantly increased cell viability and inhibitedα-synuclein expression in 1-methyl-4-phenylpyridinium-treated *** together,our findings demonstrate for the first time that exosomal N-acetyl-alpha-glucosaminidase may serve as a biomarker for Parkinson’s disease diagnosis,and that N-acetyl-alpha-glucosaminidase may reduceα-synuclein expression and 1-methyl-4-phenylpyridinium-induced n

关键词： biomarker diagnosis exosomes N-acetyl-alpha-glucosaminidase Parkinson’s disease proteomic α-synuclein

Physical Layer Security Scheme With AoI-Awareness for Industrial IoT Based on Covert Communications

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IEEE/CAA Journal of Automatica Sinica 2025年第1期 276-278页

作者： yaping Li Zhi-Xin liu Jia-Wei Su ya-Zhou Yuan the Key Laboratory of Industrial Computer Control Engineering of Hebei Province Yanshan University

Dear Editor,Industrial Internet of things(IIoT) is a typical application of cyberphysical system(CPS). In the IIoT, wireless communication is an inevitable trend to replace the deployment-limited wired transmission for cases with large-scale and mobile devices. However, wireless communication gives rise to critical issues related to physical security, such as malicious detections and attacks [1].

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Rational modulation of fluorophosphate cathode by anionic groups to reduce the polarization behavior for fast-charging sodium-ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 509-521页

作者： Xinyuan Wang Fan Zhang Xingyu Zhou Qian Wang Changyu liu yangyang liu Hui Wang Xiaojie liu Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science Northwest University

Na3V2（PO4）2O2F （VP） is recognized as a promising cathode material for sodium-ion batteries due to its stable structural framework and high specific *** functional theory （DFT） and finite element simulations show that incorporating SO42-into VP decreases its band gap,lowers the migration energy barrier,and ensures a uniform Na+concentration gradient and stress distribution during charge and discharge ***,the average Na+diffusion coefficient of Na3V2（PO4）1.95（SO4）0.05O2F（VPS-1） is roughly double that of VP,leading to enhanced rate capability (80 C,75.5 mAh g-1) and cycling stability (111.0 mAh g-1capacity after 1000 cycles at 10 C current density) for ***-1 exhibits outstanding fast-charging capabilities,achieving an 80%state of charge in just 8.1 *** assembled VPS-1//SbSn/NPC full cell demonstrated stable cycling over 200 cycles at a high 5 C current,maintaining an average coulombic efficiency of 95.35%.

关键词： Anionic group modulation Polarization behavior Fast-charging Sodium-ion battery Fluorophosphate Cathode

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基于指纹块中主要脊和次要脊的方向场估计

上海交通大学学报 2010年第3期44卷 423-427页

作者：刘欢喜李雄刘亚雄刘允才上海交通大学电子信息与电气工程学院上海200240

针对方向场估计算法存在估计精度不高、计算时间开销过大的现象,提出一种基于指纹块中主要脊和次要脊的指纹方向场估计方法.它主要包括4个处理步骤:预处理原始指纹图像,利用上半邻域搜索算法提取指纹前景块中的主要脊和次要脊,利用脊的... 详细信息

针对方向场估计算法存在估计精度不高、计算时间开销过大的现象,提出一种基于指纹块中主要脊和次要脊的指纹方向场估计方法.它主要包括4个处理步骤:预处理原始指纹图像,利用上半邻域搜索算法提取指纹前景块中的主要脊和次要脊,利用脊的直线模型估计指纹前景块方向,以及采用修正方案提高方向场估计的精度.实验结果表明,该方法不仅具有令人满意的估计精度,而且拥有很高的计算效率;且具有很强的抗噪性能,能够有效提高指纹识别系统的性能.

关键词：指纹方向场主要脊和次要脊上半邻域搜索算法脊的直线模型修正方案

船舶随机参-强激励横摇概率密度函数的半解析方法研究

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中国海洋大学学报（自然科学版） 2019年第12期49卷 108-115页

作者：刘利琴刘亚柳吕鑫鑫李妍天津大学水利工程仿真与安全国家重点实验室

参数激励横摇是第二代稳性衡准的重要研究内容,本文基于此研究了随机斜浪中船舶在参-强激励下的横摇运动。将随机海浪波面升高处理为窄带随机过程,使其分解为两个互不相关的随机过程,从而简化了随机波面函数的表达形式。基于切片法数值... 详细信息

参数激励横摇是第二代稳性衡准的重要研究内容,本文基于此研究了随机斜浪中船舶在参-强激励下的横摇运动。将随机海浪波面升高处理为窄带随机过程,使其分解为两个互不相关的随机过程,从而简化了随机波面函数的表达形式。基于切片法数值求解复原力臂函数,并用解析表达式进行拟合。建立了船舶参-强激励横摇运动方程,以C11型集装箱船为例,分别应用解析方法(能量包线随机平均法)和数值方法(蒙特卡洛法)求解了顶浪150°时横摇响应的概率密度函数。通过对两种方法得到的计算结果进行对比,验证了解析方法和数值方法的正确性。最后,对横摇响应概率进行敏感性分析,研究了特征波长对横摇响应概率的影响。

关键词：横摇随机参-强激励随机平均法概率密度函数

Role of the Greenland Sea ice anomaly in the late-spring drought over Northwest China

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 1-5页

作者： yang liu Huopo Chen Nansen-Zhu International Research Centre Institute of Atmospheric Physics Chinese Academy of SciencesBeijingChina Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University for Information Science and TechnologyNanjingChina

Drought across Northwest China in late spring has exerted a vital effect on the local climate and agricultural production,and has been alleviated during the past *** study explored the influence of the preceding Arctic sea ice on the May drought in Northwest China caused by the precipitation *** analysis indicated that when the Greenland Sea ice concentration is abnormally high during February to April,the dry conditions in Northwest China tend to be *** increase of sea ice in the Greenland Sea can excite a meridional circulation,which causes sea surface temperature(SST)anomalies in the North Atlantic via the sea-air interaction,manifested as significant warm SST anomalies over the south of Greenland and the subtropical North Atlantic,but negative SST anomalies over the west of the *** abnormal SST pattern maintains to May and triggers a zonal wave train from the North Atlantic through Scandinavia and Central Asia to Northwest China,leading to abnormal cyclones in Northwest ***,Northwest China experiences a more humid climate than usual.

关键词： Arctic sea ice Greenland Sea North Atlantic SST Drought Northwest China