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三维测量与逆向工程实践项目建设与探索

实验室科学 2024年第3期27卷 115-119页

作者：刘江宁刘洋洋杨静张博沈阳航空航天大学工程训练中心辽宁沈阳110136 辽宁装备职业制造技术学院自动控制工程学院辽宁沈阳110136

为了促进三维测量与逆向工程与实训教学深度融合,培育适应沈阳航空航天大学学科建设的人才与现代工业企业实现精准无缝对接,构建“一心三环”的全面育人模式,提出将三维测量与逆向技术融入工程实践教学中,通过引入课程思政、更新教学方... 详细信息

为了促进三维测量与逆向工程与实训教学深度融合,培育适应沈阳航空航天大学学科建设的人才与现代工业企业实现精准无缝对接,构建“一心三环”的全面育人模式,提出将三维测量与逆向技术融入工程实践教学中,通过引入课程思政、更新教学方法、丰富教学环节及完善考核评价等方式,提升学生的工程实践以及创新能力,丰富工程训练中心实训教学项目,让学生在工程实践过程中德才兼备,全面发展,共赢未来。

关键词：实训教学逆向工程项目建设课程思政

曲安奈德注射液联合开喉剑喷雾剂治疗糜烂型口腔扁平苔藓临床观察

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河北中医 2024年第3期46卷 420-423页

作者：张立立刘洋洋刘爱民天津市宁河区医院口腔科天津301509

目的观察曲安奈德注射液联合开喉剑喷雾剂治疗糜烂型口腔扁平苔藓的临床疗效。方法将100例糜烂型口腔扁平苔藓患者按照随机数字表法分为2组,治疗组50例予曲安奈德注射液联合开喉剑喷雾剂治疗,对照组50例予曲安奈德注射液联合灭菌注射用... 详细信息

目的观察曲安奈德注射液联合开喉剑喷雾剂治疗糜烂型口腔扁平苔藓的临床疗效。方法将100例糜烂型口腔扁平苔藓患者按照随机数字表法分为2组,治疗组50例予曲安奈德注射液联合开喉剑喷雾剂治疗,对照组50例予曲安奈德注射液联合灭菌注射用水治疗。2组均治疗4周,并于治疗2、4周后复诊。比较2组疗效;比较2组治疗前后黏膜愈合评分变化;比较2组治疗前后疼痛视觉模拟评分(VAS)变化;比较2组治疗前后白细胞介素6(IL-6)水平变化;观察2组不良反应。结果2组治疗2周总有效率比较差异无统计学意义(P>0.05);治疗4周治疗组总有效率90.0%(45/50),对照组总有效率66.0%(33/50),治疗组疗效优于对照组(P<0.05)。2组治疗2、4周黏膜愈合评分均较本组治疗前降低(P<0.05),且治疗组降低更明显(P<0.05)。2组治疗2、4周疼痛VAS均较本组治疗前降低(P<0.05),且治疗组降低更明显(P<0.05)。2组治疗4周IL-6水平均较本组治疗前降低(P<0.05),且治疗组降低更明显(P<0.05)。2组患者治疗期间均未出现腹泻、恶心、食欲减退、念珠菌性口炎等不良反应。结论曲安奈德注射液联合开喉剑喷雾剂治疗糜烂型口腔扁平苔藓,可有效改善患者口腔黏膜症状,且不良反应较少。

关键词：扁平苔癣,口腔喷雾剂曲安奈德

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基于学科特点的激光加工实训改革分析

实验室科学 2024年第2期27卷 179-182页

作者：刘江宁杨静刘洋洋张博沈阳航空航天大学工程训练中心辽宁沈阳110136 辽宁装备职业制造技术学院自动控制工程学院辽宁沈阳110136

激光加工技术属于先进制造技术,它的飞速发展使得其在工程训练教学中扮演越来越重要的角色。面向各个学科进行的工程训练项目中,激光加工设置课时相对较少,教学内容大体无变化,教学效果参差不齐。本着以学生为核心的教学思路为主线,进... 详细信息

激光加工技术属于先进制造技术,它的飞速发展使得其在工程训练教学中扮演越来越重要的角色。面向各个学科进行的工程训练项目中,激光加工设置课时相对较少,教学内容大体无变化,教学效果参差不齐。本着以学生为核心的教学思路为主线,进一步凝练并提升沈阳航空航天大学工程训练中心特色建设的原则,并结合不同学科特点、特色(以航空宇航学科为例),设置具有针对性的实训内容,实训内容更加丰富,从而更好地促进了每个学生的个性化发展,提升应用型人才培养质量。并将不同学科实训项目与思政理念结合起来,将能够有助于培养具备先进理念和较高工程创新能力的综合型应用型人才。

关键词：学科特点工程训练激光加工教学改革

Error Probability Analysis for Ultra-Massive MIMO System and Near-Optimal Signal Detection

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China Communications 2023年第5期20卷 1-19页

作者： Lixia Xiao Shuo Li yangyang liu Guanghua liu Pei Xiao Tao Jiang Research Center of 6G Mobile Communications School of Cyber Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China 5G&6G Center of University of Surrey SurreyGU27XHUnited Kingdom

In this paper,average bit error probability(ABEP)bound of optimal maximum likelihood(ML)detector is first derived for ultra massive(UM)multiple-input-multiple-output(MIMO)system with generalized amplitude phase modulation(APM),which is confirmed by simulation ***,a minimum residual criterion(MRC)based lowcomplexity near-optimal ML detector is proposed for UM-MIMO ***,we first obtain an initial estimated signal by a conventional detector,i.e.,matched filter(MF),or minimum mean square error(MMSE)and so ***,MRC based error correction mechanism(ECM)is proposed to correct the erroneous symbol encountered in the initial *** results are shown that the performance of the proposed MRC-ECM based detector is capable of approaching theoretical ABEP of ML,despite only imposing a slightly higher complexity than that of the initial detector.

关键词： average bit error probability(ABEP) ultra-massive MIMO(UM-MIMO) minimum residual criterion(MRC) maximum likelihood(ML) matched filter(MF)

A Unified Bit-to-Symbol Mapping for Generalized Constellation Modulation

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China Communications 2023年第6期20卷 229-239页

作者： Lixia Xiao Xiaodan Zhai yangyang liu Guanghua liu Pei Xiao Tao Jiang Research Center of 6G Mobile Communications School of Cyber Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China 5G&6G Center of University of Surrey SurreyGU27XHUnited Kingdom

Gray mapping is a well-known way to improve the performance of regular constellation modulation,but it is challenging to be applied directly for irregular *** address this issue,in this paper,a unified bit-to-symbol mapping method is designed for generalized constellation modulation(i.e.,regular and irregular shaping).The objective of the proposed approach is to minimize the average bit error probability by reducing the hamming distance(HD)of symbols with larger values of pairwise error *** results show that the conventional constellation modulation(i.e.,phase shift keying and quadrature amplitude modulation(QAM)with the proposed mapping rule yield the same performance as that of classical gray ***,the recently developed golden angle modulation(GAM)with the proposed mapping method is capable of providing around1 d B gain over the conventional mapping counterpart and offers comparable performance to QAM with Gray mapping.

关键词： gray mapping generalized constellation modulation golden angle modulation(GAM) pairwise error probability(PEP) hamming distance(HD)

Performance Analysis for Orthogonal Time Frequency Space Modulation Systems with Generalized Waveform

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China Communications 2023年第4期20卷 57-72页

作者： Shuo Li Lixia Xiao yangyang liu Guanghua liu Pei Xiao Tao Jiang Research Center of 6G Mobile Communications School of Cyber Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China School of Electronic Information and Communications Huazhong University of Science and TechnologyWuhan 430074China 5G & 6G Center of University of Surrey SurreyGU27XHUnited Kingdom

Orthogonal time-frequency space(OTFS),which exhibits beneficial advantages in high-mobility scenarios,has been considered as a promising technology in future wireless communication *** this paper,a universal model for OTFS systems with generalized waveform has been ***,the average bit error probability(ABEP)upper bounds of the optimal maximum likelihood(ML)detector are first derived for OTFS systems with generalized ***,for OTFS systems with the ideal waveform,we elicit the ABEP bound by recombining the transmitted signal and the received *** OTFS systems with practical waveforms,a universal ABEP upper bound expression is derived using moment-generating function(MGF),which is further extended to MIMO-OTFS *** results validate that our theoretical ABEP upper bounds are concur with the simulation performance achieved by ML detectors.

关键词： orthogonal time frequency space(OTFS) average bite error rate(ABEP) maximum likelihood(ML) moment generating-function(MGF)

Reactive oxygen species regulate auxin levels to mediate adventitious root induction in Arabidopsis hypocotyl cuttings

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Journal of Integrative Plant Biology 2020年第7期62卷 912-926页

作者： Aixia Huang Yongshun Wang yangyang liu Guodong Wang Xiaoping She College of Life Sciences Shaanxi Normal UniversityXi'an 710119China

Adventitious root(AR)formation from leafy stem cuttings is critical for breeding of many forest and horticultural *** addition to the plant hormone auxin,wound-induced signaling caused by the cutting excision is also essential for AR *** we found that reactive oxygen species(ROS)are rapidly generated at the excision site as a wound-induced signal and propagated throughout the hypocotyl cut-ting after excision of the Arabidopsis(Arabidopsis thaliana)primary *** propagation was not ob-served in the presence of an NADPH oxidase inhibitor(diphenylene iodonium chloride)or in a knockout mu-tant of the NADPH oxidase gene respiratory burst oxi-dase homolog protein D(RBOHD).Respiratory burst oxidase homolog protein D was specifically upregulatedin hypocotyl cuttings at 0.5 h post excision(hpe).To-gether,these data suggest that RBOHD mediates ROS propagation in hypocotyl *** also found that auxin levels increased significantly in the shoot apex at 5 hpe and at the base of the cutting at 6 hpe;these effects were blocked by treatment with ROS *** with this,transcript levels of auxin biosynthesis and polar-transport genes generally in-creased between 1 to 6 ***,our results suggest that wound-induced ROS participate in AR in-duction through regulation of auxin biosynthesis and transport.

关键词： Arabidopsis wound media

Investigation of optical reflectance from different animal vertebra along the fixation trajectory of pedicle screw in frequency domain

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Journal of Innovative Optical Health Sciences 2020年第1期3卷 132-141页

作者： yangyang liu Huan Zhang Ying Tong Zhiyu Qian Weitao Li Department of Biomedical Engineering Nanjing University of Aeronautics and Astronautics Nanjing JiangsuP.R.China College of Information and Communication Engineering Nanjing Institute of Technology Nanjing JiangsuP.R.China

Accurate placement of pedicle screw(PS)is crucial in spinal *** new real-time intra-operative monitoring and navigation methods is an important direction of clinical appli-cation *** this paper,we studied the spectrum along the fixation trajectory of PS in frequency domain to tackle the accuracy *** porcine vertebrae,bovine vertebrae and ovine vertebrae were measured with the near-infrared spectrum(NIR)device to obtain the reflected spectrum from the *** the fixation trajectory of PS,average energy from different groups was calculated and used for identifying different tissues and compared to achieve the optimal recognition *** with the time domain approach,the frequency domain method could divide the spectra measured at different tissue points into different groups more stably and accurately,which could serve as a new method to assist the PS *** results gained from this study are significant to the development of hi-tech medical instruments with independent intellectual property rights.

关键词： Pedicle screw fixation frequency domain optical reflectance vertebra

α+^(209)Bi反应激发函数及厚靶产额计算

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原子能科学技术 2024年第5期58卷 982-989页

作者：刘洋阳黄小龙王记民刘丽乐金永利王香涵汪文烨中国原子能科学研究院中国核数据中心北京102413

^(211)At是理想的靶向α治疗核素,^(209)Bi(α,2n)^(211)At是产生该放射性核素的重要核反应,精确可靠的核反应数据对于^(211)At核素生产具有重要意义。^(209)Bi(α,3n)^(210)At反应产物^(210)At核素会衰变为剧毒的^(210)Po核素,掌握该... 详细信息

^(211)At是理想的靶向α治疗核素,^(209)Bi(α,2n)^(211)At是产生该放射性核素的重要核反应,精确可靠的核反应数据对于^(211)At核素生产具有重要意义。^(209)Bi(α,3n)^(210)At反应产物^(210)At核素会衰变为剧毒的^(210)Po核素,掌握该反应信息也有助于安全有效提取^(211)At产物。为获得上述反应相关信息,对国际核反应实验数据库(EXFOR)中相关实验测量数据进行了收集分析,使用EMPIRE程序,基于选取的合理光学模型势与能级密度参数对上述反应的激发函数进行了计算。通过理论计算结果与实验数据的比对,得到了^(209)Bi(α,2n)^(211)At、^(209)Bi(α,3n)^(210)At反应激发函数。在此基础上,计算了^(211)At核素和^(210)At核素的厚靶产额。最后得到了入射能量小于50 MeV能区范围内^(209)Bi(α,2n)^(211)At、^(209)Bi(α,3n)^(210)At反应激发函数推荐值及^(211)At(医用放射性同位素)和^(210)At(衰变子体为长寿命极毒性核素^(210)Po)的厚靶产额推荐评价结果。^(210)At核素厚靶产额计算结果表明,生产^(211)At核素过程中,入射α粒子能量需低于29 MeV。此条件下^(210)At与^(211)At厚靶产额比小于10^(-5),满足国际放射防护委员会规定的职业摄入量,符合^(211)At后续标记的要求。

关键词：带电粒子核反应数据评价激发函数厚靶产额