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基于FPGA的改进型SVPWM算法仿真与实现

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仪表技术 2024年第4期 78-81页

作者：杨云逸谢鹏李建文刘娜陈金鹤天津理工大学天津市复杂系统控制理论及应用重点实验室天津300384 国家汽车电气零部件产品质量监督检验中心浙江瑞安325204

在传统的电机控制算法中,三相空间矢量脉宽调制(SVPWM)通常都是在数字信号处理器(DSP)中实现的,但DSP的串行执行特点在一些高性能控制场合或者特殊应用领域会限制算法性能的提升。为此,提出一种基于现场可编程门阵列(FPGA)的改进型SVPW... 详细信息

在传统的电机控制算法中,三相空间矢量脉宽调制(SVPWM)通常都是在数字信号处理器(DSP)中实现的,但DSP的串行执行特点在一些高性能控制场合或者特殊应用领域会限制算法性能的提升。为此,提出一种基于现场可编程门阵列(FPGA)的改进型SVPWM算法。通过对传统七段式SVPWM算法进行简化处理,避免了复杂的三角函数和乘除运算,以适应FPGA的运算特点。在Matlab/Simulink中搭建了该算法和逆变器的模型,并使用Verilog HDL硬件描述语言进行硬件实现。仿真波形和实验结果均证实了所提算法的正确性和有效性。该算法的实现为后期永磁同步电机的矢量闭环控制应用提供了必要基础。

关键词：空间矢量脉宽调制电机控制现场可编程门阵列

All-optical logic gates based on hierarchical photonic crystal modulated photoluminescence of perovskite nanocrystals

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中国科学:技术科学英文版 2023年第9期66卷 2735-2742页

作者： WANG Yun ZHA YanFang yang yunyi LIU CiHui DI YunSong CAO GuiYuan WEI ShiBiao CHEN ZhiHui GAN ZhiXing Center for Future Optoelectronic Functional Materials School of Computer and Electronic InformationSchool of Artificial IntelligenceNanjing Normal UniversityNanjing 210023China Centre for Translational Atomaterials School of ScienceSwinburne University of TechnologyHawthorn VIC 3122Australia Nanophotonics Research Center Shenzhen Key Laboratory of Micro-Scale Optical Information TechnologyShenzhen UniversityShenzhen 518060China Key Laboratory of Advanced Transducers and Intelligent Control Systems Ministry of Education and Shanxi ProvinceCollege of Electronic Information and Optical EngineeringTaiyuan University of TechnologyTaiyuan 030024China

Halide perovskites exhibit high performance in all sorts of optoelectronic and photonic areas, suggesting their huge potential in integrated photonic devices. However, until now, all optical logic gates based on perovskites are still rarely explored, hindering the development of all-optical networks and computing. Herein, a new concept of all-optical logic gates is proposed based on the modulation of photoluminescence(PL) from perovskite nanocrystals(PNCs). A hierarchical photonic crystal(Hie PhC) is developed by self-assembling polystyrene(PS) and SiO2nanoparticles, which exhibit a higher PL enhancement than that of a monolayer PhC. Moreover, the light-controlled PL is realized by taking advantage of the high thermal response of the PL from PNCs/Hie PhC on polyethylene(PE) substrate, assisted by a graphene layer for light-heat conversion. Consequently, optical diode and triode are achieved based on the modulated PL, which exhibit contrast ratios(CR) of 24.7 and 74.0 dB, ***-optical logic gates, including “AND”, “OR” and “NOT”, are realized based on the optical diode and triode.

关键词： perovskite nanocrystals photonic crystals all-optical logic gates modulation of photoluminescence

三孩政策下普惠托育服务的供需现状及其提升路径

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科技和产业 2024年第11期24卷 156-161页

作者：秦嘉悦王蕾杨蕴依陈雨婷李易非南京财经大学经济学院南京210000

为探讨在三孩政策背景下普惠托育服务的供求关系,通过问卷实地结合的调查形式获取数据,借助Kruskal-Wallis检验统计量、Logistic回归模型对数据进行分析。结果表明:发展托育服务与实行生育政策相辅相成;目前托育服务的供给仍然不足,普... 详细信息

为探讨在三孩政策背景下普惠托育服务的供求关系,通过问卷实地结合的调查形式获取数据,借助Kruskal-Wallis检验统计量、Logistic回归模型对数据进行分析。结果表明:发展托育服务与实行生育政策相辅相成;目前托育服务的供给仍然不足,普惠托育是行业的发展方向。政府应加大对普惠托育服务的投入,增加市场活力,鼓励社会力量参与托育服务的提供,促进公私合作,共同推动普惠托育服务的发展。

关键词：三孩政策普惠托育托育机构需求与供给

复方丹参滴丸联合羟苯磺酸钙治疗糖尿病性视网膜病变临床效果的meta分析

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中国医药导报 2024年第11期21卷 109-113页

作者：尹宏萍雷涛杨芸艺侯可可陈琳沙雯君上海中医药大学附属普陀医院内分泌科上海200062

目的系统评价复方丹参滴丸辅助羟苯磺酸钙治疗糖尿病性视网膜病变(DR)的临床效果。方法检索中国知网、万方数据知识服务平台、维普网、中国生物医学文献服务系统、PubMed、Embase、Web of Science和Cochrane Library建库至2023年7月复... 详细信息

目的系统评价复方丹参滴丸辅助羟苯磺酸钙治疗糖尿病性视网膜病变(DR)的临床效果。方法检索中国知网、万方数据知识服务平台、维普网、中国生物医学文献服务系统、PubMed、Embase、Web of Science和Cochrane Library建库至2023年7月复方丹参滴丸联合羟苯磺酸钙治疗DR的临床随机对照试验。结果共纳入11项临床随机对照试验,共848例患者,观察组425例,对照组423例。meta分析结果显示,与对照组比较,试验组视野灰度值[均值差(MD)(95%CI):-0.92(-0.96,-0.88),P<0.00001]、血管瘤体积[MD(95%CI):-3.11(-3.33,-2.89),P<0.00001]、出血斑面积[MD(95%CI):-0.76(-0.85,-0.67),P<0.00001]、黄斑厚度[MD(95%CI):-55.62(-62.59,-48.65),P<0.00001]、血管内皮生长因子水平[MD(95%CI):-17.63(-21.6,-13.59),P<0.00001]、肿瘤坏死因子-α水平[MD(95%CI):-13.3(-16.09,-10.68),P<0.00001]更低,视力[MD(95%CI):0.13(0.05,0.20),P<0.00001]更好。无明显不良反应或事件发生。敏感性分析检验证实模型稳定性高,结论可信度高。结论根据目前临床证据,复方丹参滴丸与羟苯磺酸钙联用可提高DR的临床疗效。

关键词：复方丹参滴丸糖尿病性视网膜病变联合用药 meta分析

Discrete control of longitudinal dynamics for hypersonic flight vehicle using neural networks

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Science China(Information Sciences) 2015年第7期58卷 49-58页

作者： ZHI YongFeng yang yunyi School of Automation Northwestern Polytechnical University

The discrete controller is developed for the longitudinal dynamics of the hypersonic flight vehicle with neural networks(NNs). The focus is on the control of the Euler equations of attitude dynamics. With back-stepping design, for each step the virtual control is constructed with NNs approximating the unknown dynamics. The design uses less online adaption parameter learning scheme to achieve the control goal. It is guaranteed that the errors of all the signals in the system are uniformly ultimately bounded. The proposed method is verified by simulation of winged-cone model.

关键词： discrete control hypersonic vehicle back-stepping neural network adaption parameter

全程管理模式对临床药师抗感染会诊效果影响的前后对照单臂观察性研究

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安徽医药 2024年第4期28卷 845-848页

作者：廖音娟刘金玲杨韫饴唐蜜蜜杨勇刘宇俊甘发平谭周舟董梅芳长沙市第四医院、湖南师范大学附属长沙医院药学部湖南长沙410006 长沙市第四医院、湖南师范大学附属长沙医院信息科湖南长沙410006

目的探讨全程管理模式对医院临床药师抗感染会诊的影响效果。方法对长沙市第四医院临床药师抗感染会诊实施全程管理模式前(2021年2—7月)的592例会诊病例和实施全程管理模式后(2022年2—7月)的688例会诊病例的抗菌药物使用疗程、抗菌... 详细信息

目的探讨全程管理模式对医院临床药师抗感染会诊的影响效果。方法对长沙市第四医院临床药师抗感染会诊实施全程管理模式前(2021年2—7月)的592例会诊病例和实施全程管理模式后(2022年2—7月)的688例会诊病例的抗菌药物使用疗程、抗菌药物使用品种数、抗菌药物使用费用、抗菌药物使用累计DDD(限定日剂量)数、抗菌药物使用强度、病人住院天数、病人住院费用和病人住院药品费用等指标进行对比和分析。结果实施全程管理模式后,临床药师参与管理的抗感染会诊病例的抗菌药物使用累计DDD数减少3.31(实施前21.16±19.65,实施后17.85±16.09)、抗菌药物使用强度减少6.79(实施前103.22±58.37,实施后96.43±48.80)、病人住院天数减少2.26 d[实施前(20.59±13.13)d,实施后(18.33±11.71)d],抗菌药物使用天数、抗菌药物使用品种数、抗菌药物使用费用、病人住院费用以及病人住院药品费用等指标差异无统计学意义。结论全程管理模式对临床药师抗感染会诊效果影响显著,对降低临床药师参与抗感染会诊病例的抗菌药物使用强度及减轻病人疾病负担具有重要意义,值得推广应用。

关键词：药学服务药剂学管理全程管理模式临床药师抗感染会诊

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Early Growth Response Gene-1 Deficiency Interrupts TGFβ1 Signaling Activation and Aggravates Neurodegeneration in Experimental Autoimmune Encephalomyelitis Mice

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Neuroscience Bulletin 2024年第3期40卷 283-292页

作者： yunyi Lan Xinyan Han Fei Huang Hailian Shi Hui Wu Liu yang Zhibi Hu Xiaojun Wu Shanghai Key Laboratory of Compound Chinese Medicines The Ministry of Education Key Laboratory for Standardization of Chinese MedicinesThe State Administration of TCM Key Laboratory for New Resources and Quality Evaluation of Chinese MedicineInstitute of Chinese Materia MedicaShanghai University of Traditional Chinese MedicineShanghai201203China Central Laboratory Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghai200021China

Early growth response protein 1(Egr-1)triggers the transcription of many genes involved in cell growth,differentiation,synaptic plasticity,and ***,its mechanism in neuronal survival and degeneration is still poorly *** study demonstrated that Egr-1 was down-regulated at mRNA and protein levels in the central nervous system(CNS)of experimental autoimmune encephalomyelitis(EAE)***-1 knockout exacerbated EAE progression in mice,as shown by increased disease severity and incidence;it also aggravated neuronal apoptosis,which was associated with weakened activation of the BDNF/TGFβ1/MAPK/Akt signaling pathways in the CNS of EAE ***,Egr-1 siRNA promoted apoptosis but mitigated the activation of BDNF/TGFβ1/MAPK/Akt signaling in SH-SY5Y *** results revealed that Egr-1 is a crucial regulator of neuronal survival in EAE by regulating TGFβ1-mediated signaling activation,implicating the important role of Egr-1 in the pathogenesis of multiple sclerosis as a potential novel therapy target.

关键词： Early growth response protein 1 Transforming growth factor-beta 1 Multiple sclerosis Experimental autoimmune encephalomyelitis Neurodegeneration

Self-care in stroke patients and the capability of primary caregivers

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Neural Regeneration Research 2010年第23期5卷 1812-1816页

作者： Huiying Zhang Paer Yi yunyi yang Nursing School of Shanghai Jiao Tong University Shanghai 200025 China

Stroke rehabilitation, especially for patients with sequelae, lacks practicable rehabilitation training methods. Using the convenience sampling method, self-care ability in 60 stroke patients was investigated for 6 months to 2 years post-stroke （sequelae stage）, as well as the capability of primary caregivers selected from two communities in Shanghai, China. Influential factors were analyzed. Results demonstrated that only 37% of stroke patients exhibited strong self-care ability, and 43% of primary caregivers provided high levels of care. Results also demonstrated that self-care ability in stroke patients, as well as the capability of primary caregivers, should be improved. A total of 47% of stroke patients participated in community rehabilitation training, and self-care ability was significantly better in this group than in patients who did not receive rehabilitation training. Thus it is necessary to develop systematic, individualized, and family-based rehabilitative strategies to improve community rehabilitation training modes and strengthen rehabilitation guidance for patients and caregivers.

关键词： stroke rehabilitation community self-care primary caregiver investigation

Two-dimensional C2N-based single-atom catalyst with complex microenvironment for enhanced electrochemical nitrogen reduction:A descriptor-based design

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Journal of Energy Chemistry 2024年第10期97卷 110-119页

作者： Enduo Dai Wei An Ruixian Guo Xugen Shi yunyi Li Yibo Wang Mingming Liu College of Chemistry and Chemical Engineering Shanghai University of Engineering Science

The catalytic descriptor with operational feasibility is highly desired towards rational design of high-performance catalyst especially the electrode/electrolyte solution interface working under mild ***,we demonstrate that the descriptor Ω parameterized by readily accessible intrinsic properties of metal center and coordination is highly operational and efficient in rational design of single-atom catalyst（SAC） for driving electrochemical nitrogen reduction（NRR）.Using twodimensional metal（M）-BxPySzNm@C2N as prototype SAC models,we reveal that*N2+（H++e-）→*N2H acts predominantly as the potential-limiting step（PLS） of NRR on M-B2P2S2@C2N and M-B1P1S1N3@C2N regardless of the distinction in coordination *** the 28 screened M active sites,with Ω values close to the optimal 4,M-B2P2S2@C2N(M=V（Ω=3.53）,Mo（Ω=5.12）,and W（Ω=3.92）) and M-B1P1S1N3@C2N(M=V（Ω=3.00）,Mo（Ω=4.34）,and W（Ω=3.32）) yield the lowered limiting potential（UL） as-0.45,-0.54.-0.36,-0.58,-0.25,and-0.24 V,respectively,thus making them the promising NRR *** importantly,these SACs are located around the top of volcano-shape plot of ULversus Ω,re-validating Ω as an effective descriptor for accurately predicting the high-activity NRR SACs even with complex *** study unravels the relationship between active-site structure and NRR performance via the descriptor Ω,which can be applied to other important sustainable electrocatalytic reactions involving activation of small molecules via σ-donation and π*-backdonation mechanism.

关键词： Descriptor DFT Electrocatalysis N2 reduction Single-atom catalyst