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基于OBE理念的特殊教育专业师范生人才培养路径探究

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长春大学学报 2024年第5期34卷 100-104页

作者：孙晶华张红阳长春大学特殊教育学院长春130022

特殊教育人才培养是促进特殊教育事业发展的关键要素,目前,高校特殊教育人才培养仍存在理念不能与时俱进、培养目标定位不准确、人才培养模式创新不足、人才培养评价机制不完善等问题。文章基于OBE理念,对特殊教育人才培养以学习成果为... 详细信息

特殊教育人才培养是促进特殊教育事业发展的关键要素,目前,高校特殊教育人才培养仍存在理念不能与时俱进、培养目标定位不准确、人才培养模式创新不足、人才培养评价机制不完善等问题。文章基于OBE理念,对特殊教育人才培养以学习成果为导向,以反向设计、正面施工的人才培养机制为依据,探究出通过制定明确的特殊教育人才培养目标、创新适应时代发展的特殊教育人才培养模式,强化特殊教育人才培养成效、完善特殊教育人才培养评价机制等高校特殊教育专业人才培养新路径。

关键词： OBE理念特殊教育人才培养

Mammographic density and risk of breast cancer recurrence and mortality

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Chinese Medical Journal 2022年第13期135卷 1607-1609页

作者： Lipeng Liu jinghua sun Zanchao Liu Hebei Provincial Key Laboratory of Basic Medicine for Diabetes The Second Hospital of ShijiazhuangShijiazhuangHebei 050000China.

To the Editor:Breast cancer is the most commonly diagnosed cancer and the leading cause of cancer death among *** to the advantages of low pain,high resolution,and good reproducibility,mammography is widely used in early breast cancer clinical *** density(MD)is the proportion of dense breast tissue in mammograms and is one of the strongest risk factors for breast *** have shown that high MD increases breast cancer risk by 4 to 6 times.A previous meta-analysis of 13 case-control studies showed a positive correlation(odds ratio[OR]:1.52,95%confidence interval[CI]:1.39-1.66)between percentage dense area and breast cancer risk,[1]but it did not assess the relationship between MD and breast cancer prognosis.

关键词： breast cancer Breast

Recent advances and emerging trends of rare-earth-ion doped spectral conversion nanomaterials in perovskite solar cells

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Journal of Rare Earths 2022年第11期40卷 1651-1667,I0001页

作者： Syed Afaq Ali Shah Muhammad Hassan Sayyad jinghua sun Zhongyi Guo School of Electrical Engineering&Intelligentization Dongguan University of TechnologyDongguan 523808China Advanced Photovoltaic Research Labs(APRL) Faculty of Engineering SciencesGhulam Ishaq Khan Institute of Engineering Sciences and TechnologyTopiDistrictSwabiKhyberPakhtunkhwa23640Pakistan School of Computer and Information Hefei University of TechnologyHefei 2300o9China

Organic-inorganic lead halide based perovskite solar cells(PSCs)have attracted unprecedented research interest over last *** high performance,combined with merits of low fabrication costs and ease of synthesis make PSCs promising alternate to state of the art silicon(Si)based solar *** r,some inherent shortcomings of PSCs are hindering their market dominance over conventional photovoltaic technologies such as transmission loss of sub-bandgap photons,poor stability and hysteresis ***,use of rare earth(RE)ions doped nanomaterials in PSCs,has been identified as an effective means to address the aforementioned issues by expanding the range of absorption spectra minimizing the non-absorption loss of solar photons,enhancing light scattering and improving operational *** article reviews the recent progress in doping rare-earth(RE)ions in the building blocks of PSCs such as semiconductor electrodes and photoactive perovskite layers,and its use as a separate spectral conversion layer in *** effect of size,shape,constitution and concentration of RE-nanoparticles on the overall performance and device stability will be analyzed in ***,we provide an outlook on the opportunities this newly developed field offers and the critical challenges faced in rationally and effectively using RE-ion-doped nanomaterials in PSCs for better operational stability and enhanced performance.

关键词： Efficiency Electron transport layer Photovoltaics Rare-earth(RE) Perovskite solar cells Up/down conversion

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新工科大学物理实验多维度教学模式的探索

实验室研究与探索 2024年第3期43卷 169-172,183页

作者：陈淑妍孟霆张晓峻李平王晓峰孙晶华哈尔滨工程大学物理与光电工程学院哈尔滨150001

围绕“三海一核”领域培养可靠顶用创新型人才的目标,探索了新工科背景下大学物理实验多维度教学模式。维度1,增设融入新工科元素的高阶实验和创新实验类型,构建了多层次教学内容;维度2,采用线上线下混合式的多元化教学方法,形成课前、... 详细信息

围绕“三海一核”领域培养可靠顶用创新型人才的目标,探索了新工科背景下大学物理实验多维度教学模式。维度1,增设融入新工科元素的高阶实验和创新实验类型,构建了多层次教学内容;维度2,采用线上线下混合式的多元化教学方法,形成课前、课中、课后物理实验研学新途径;维度3,采用3+1+N过程性多维考核方式,将科创竞赛纳入考核,提升过程性考核的占比,将课-赛-研-创有机融合到一起。3年的实施效果及学生反馈表明,该模式有效提升学生的实践能力、创新探索意识,提高了大学物理实验教学的达成度,为工科物理实验教学改革提供了一种新范式。

关键词：分层次教学线上线下混合多维度考核创新能力

动态MRI成像技术对低位直肠癌保肛术后LARS的评估价值

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天津医药 2024年第6期52卷 653-657页

作者：顾程申新宇孙静华闫赛克王海平河北省唐山市工人医院影像中心 063000

目的探讨动态MRI成像技术在评估低位直肠癌保肛术后低位前切除综合征(LARS)形态学及动力学变化中的研究价值。方法前瞻性收集35例低位直肠癌保肛手术后出现LARS的患者。受试者均于术前1周和术后3个月内行盆腔常规MRI及动态MRI检查,将... 详细信息

目的探讨动态MRI成像技术在评估低位直肠癌保肛术后低位前切除综合征(LARS)形态学及动力学变化中的研究价值。方法前瞻性收集35例低位直肠癌保肛手术后出现LARS的患者。受试者均于术前1周和术后3个月内行盆腔常规MRI及动态MRI检查,将常规MRI检查作为静息相,动态MRI检查获得提肛相和力排相,于3时相上测量肛直角(ARA)、耻骨联合下缘到耻骨直肠肌直肠后壁附着点连线长度(H线)、耻骨直肠肌直肠后壁附着点到耻尾线垂直长度(M线)、耻骨直肠肌厚度、肛门内括约肌和外括约肌厚度等参数,比较患者术前与术后、中度与重度间MRI各参数的差异。结果 LARS患者术前和术后的ARA、H线长度、M线长度在提肛相最小、力排相最大、静息相居中,术前的耻骨直肠肌和肛门内、外括约肌厚度在提肛相最大、力排相最小、静息相居中,3时相间差异均有统计学意义(P0.05)。LARS患者术后的ARA均大于术前,耻骨直肠肌厚度、肛门内括约肌厚度(静息相和提肛相)、肛门外括约肌厚度均小于术前,差异有统计学意义(P0.05)。结论动态MRI检查技术将动态图像与定量指标相结合,可作为评估LARS的重要依据。

关键词：直肠肿瘤磁共振成像动态MRI成像技术低位前切除综合征低位直肠癌

基于45°倾斜光纤光栅的光纤激光频率梳(特邀)

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激光与光电子学进展 2024年第1期61卷 99-108页

作者：黄梓楠黄千千田昊晨闫志君邹萌孙敬华顾澄琳王开徐子硕李卫淅戴礼龙梁新栋牟成博上海大学特种光纤与光接入网重点实验室上海先进通信与数据科学研究院特种光纤与先进通信国际合作联合实验室上海200444 中国计量科学研究院北京100029 华中科技大学光学与电子信息学院下一代互联网接入系统国家工程实验室湖北武汉430074 东莞理工学院电信工程与智能化学院广东东莞523808 华东师范大学精密光谱科学与技术国家重点实验室上海200062 浙江省引力波精密测量重点实验室国科大杭州高等研究院浙江杭州310024

利用45°倾斜光纤光栅(45°-TFG)作为光纤型起偏器,搭建了一台高可靠性高稳定性的掺铒锁模光纤激光器,并以此为基础实现了重复频率f_(rep)和载波包络偏移频率f_(ceo)的精确锁定。当泵浦功率为228 mW时,基于45°-TFG的锁模激光振荡器可实... 详细信息

利用45°倾斜光纤光栅(45°-TFG)作为光纤型起偏器,搭建了一台高可靠性高稳定性的掺铒锁模光纤激光器,并以此为基础实现了重复频率f_(rep)和载波包络偏移频率f_(ceo)的精确锁定。当泵浦功率为228 mW时,基于45°-TFG的锁模激光振荡器可实现3 dB光谱带宽为60.4 nm、脉冲宽度为68 fs的超短脉冲输出,在12 h内功率的均方根稳定性达到0.033%,且在较大的泵浦范围内均能维持较好的展宽锁模状态。经过自主搭建的非线性脉冲放大、超连续谱产生以及f-2f自参考拍频干涉光路,获得了信噪比为32 dB的f_(ceo)信号。最后通过搭建基于锁相环的主动反馈控制电路,将f_(rep)和f_(ceo)信号溯源至一台GPS时频系统,最终测得f_(rep)和f_(ceo)信号归一化后在1 s门时间内频率稳定度为2.38×10^(-12)和6.41×10^(-16)。这是首次实现基于45°-TFG的光纤激光频率梳,表明了基于45°-TFG的锁模光纤激光器在实际应用中的潜力。

关键词：锁模光纤激光器光纤光栅非线性偏振旋转光纤激光频率梳

Effect of Room Temperature Ultrasonic Vibration Compression on the Microstructure Evolution and Mechanical Properties of AZ91 Alloy

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Acta Metallurgica Sinica(English Letters) 2024年第7期37卷 1135-1146页

作者： Ziyue Xu Huan Liu Luyao Li Chao sun Xi Tan Baishan Chen Qiangsheng Dong Yuna Wu jinghua Jiang Jiang Ma College of Materials Science and Engineering Hohai UniversityNanjing210000China Suzhou Research Institute of Hohai University Suzhou215000China Shenzhen Key Laboratory of High Performance Nontraditional Manufacturing College of Mechatronics and Control EngineeringShenzhen UniversityShenzhen518060China Institute of Medical Devices(Suzhou) Southeast UniversitySuzhou215163China Institute for Advanced Study Central South UniversityChangsha410083China Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology Nanjing Institute of TechnologyNanjing211167China

To investigate the potential of direct ultrasonic vibration on improving the performance of magnesium alloys,this study first employed the ultrasonic vibration compression(UVC)on the solid solution treated AZ91 alloy,and explored its microstructure evolution and mechanical properties under *** only two seconds,the UVC alloys showed large deformation strains of 34.8–54.4%,and sudden increase of sample temperature to 243℃.Microstructure characterizations proved that UVC promoted the formation of abundant shear bands,fine grains,and the bimodal distribution of Mg17Al12 precipitates consisting of submicron particles located within the shear bands and nano-sized ones within the *** to the unique microstructure,the micro-hardness(and nano-hardness)value of UVC alloy was increased by 37.7%(35%)when compared with the solution-treated ***,the nano-modulus of the developed AZ91 alloy was also significantly increased to 62 GPa by statistical nanoindentation tests,which could be ascribed to increased Mg_(17)Al_(12) precipitates and decreased c/a value to some *** general,this work provides a new insight into the design and preparation of high-performance magnesium alloys by UVC at room temperature.

关键词： AZ91 alloys Ultrasonic vibration compression Precipitation Shear bands Mechanical properties

Control of the carrier-envelope phases of a synchronously pumped femtosecond optical parametric oscillator and its applications

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Chinese Science Bulletin 2008年第5期53卷 642-651页

作者： sun jinghua Barry J S Gale Derryck T Reid Ultrafast Optics Group School of Engineering and Physical Sciences Heriot-Watt University Edinburgh EH14 4AS UK Laboratory of Optical Physics Institute of Physics Chinese Academy of Sciences Beijing 100080 China

The intrinsic synchronization, multi-color outputs and related carrier-envelope phases (CEP) among pulses bring advantages to synchronously pumped femtosecond optical parametric oscillators and the pumping sources for broadband frequency comb generation and ultrashort waveform coherent syn-thesis. In this paper, we discuss our latest research results in this field, which cover the following as-pects: the phase relationship and energy conservation law in an OPO and related experimental verifi-cation; control of the pumping Ti:sapphire femtosecond laser's CEP by self-referencing technology, and its repetition-rate locking by piezoelectric transducer (PZT); CEP locking of the pulses from the OPO by beating the non-phase-matched visible outputs against pump supercontinuum to obtain a driving signal for a fast PZT on the OPO end mirror; the generation of a broadband frequency comb spanning from 400 nm to 2.4 μm with 1.2 kHz bandwidth; and the realization of coherent interference between phase controlled pump pulses and signal second harmonic pulses.

关键词：光学参数振荡器载波包络相同步控制超短光脉冲

Multi-direction bending sensing based on spot pattern demodulation of dual-hole fiber

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Chinese Optics Letters 2023年第12期21卷 92-96页

作者：李波瑶梁瑶瑶谢仲业左小杰孙敬华 School of Electronic Engineering and Intelligentization Dongguan University of TechnologyDongguan 523808China Centre de Nanosciences et de Nanotechnologies CNRSUniversitéParis-SaclayC2N91120 PalaiseauFrance

A multi-direction bending sensor based on spot pattern demodulation of a dual-hole fiber(DHF)is *** using the interference and scattering in a DHF,the related multidirectional variations can be captured by the optical ***,the multi-directional bending characteristics of the fiber are quantitatively described by the pattern of the output light spot,achieving multidirectional bending *** addition,considering the subtle changes in the deformation patterns over time,a convolutional neural network(CNN)model based on deep learning is introduced for accurate recognition and prediction of the bending *** experimental results show that the sensor can perceive different bending angles in four *** outstanding results indicate that the multi-directional bending sensor based on dual-hole interference pattern decoding has potential applications in multi-directional quantitative sensing and artificial intelligence perception.

关键词： microstructured optical fiber fiber device bending sensor