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Tracking Microorganisms in Production and Sale Operations of Spiced Geese 被引量:1
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作者 Huadong Xie Lijun Bu +3 位作者 Zhengze Zhong Yifan Zhang Jun Lin Zhixi Li 《Food and Nutrition Sciences》 2013年第9期950-955,共6页
Cooling, transportation and sale processes of spiced geese were studied, eight spiced geese meat samples with different sampling time, Airborne microorganism samples of three different workplaces and five different en... Cooling, transportation and sale processes of spiced geese were studied, eight spiced geese meat samples with different sampling time, Airborne microorganism samples of three different workplaces and five different environmental contact substance samples were test, measures of special mediums, biochemical identification and DNA sequencing were carried out, then Escherichia coli, Yeast, Mildew, Lactic acid bacteria, Staphylococcus aureus and Janthinobacterium were detected. For spiced geese meat samples, microorganisms were significant (p ) increased with the prolong of sampling time. Lactic acid bacteria, Staphylococcus aureus and Janthinobacterium were detected in each processing operation and the total aerobic counts of each sample was increased or significant (p ) increased with the prolong of sampling time;Escherichia coli, Yeast and Mildew were detected on samples entered into the retail outlet mainly and the total aerobic counts of each sample was increased or significant (p ) increased also. In the household workshop, Mildew and Janthinobacterium were the superior microorganisms. In the transport vehicle, Staphylococcus aureus and Janthinobacterium were the superior microorganisms;Staphylococcus aureus was the superior microorganism in the retail outlet. For environmental contact substances, Cooling platform, pallet, chopping block were the most serious contaminated environmental contact substances and the total bacteria counts were significant (p ) more than stainless steel barrel and chopper;Janthinobacterium was the superior microorganism on pallet, stainless steel barrel and chopper;Lactic acid bacteria was the superior microorganism on chopping block and stainless steel barrel;Staphylococcus aureus was the superior microorganism on cooling platform. Findings indicate that Escherichia coli, Yeast, Mildew, Lactic acid bacteria, Staphylococcus aureus, Janthinobacterium were the main microorganisms;Household workshop and the retail outlet were the main place microorganisms contaminated;Pallet, stainless steel barrel and chopper were the main environmental contact substances. 展开更多
关键词 spiced GEESE MEAT MICROBIAL Contamination PRODUCTION Operations SALE Operations
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光电二极管放大电路的SPICE仿真与实验研究
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作者 丛梦龙 周昆鹏 《现代电子技术》 北大核心 2025年第16期19-24,共6页
为整体提升光电二极管放大电路性能,在理论研究基础上,结合软件仿真和实验测试对设计方案加以优化。首先从系统传递函数角度出发,揭示引发电路振荡的原因,即开环增益和反馈因子之间特定幅度和相位关系。在此基础上,利用TINA SPICE交流... 为整体提升光电二极管放大电路性能,在理论研究基础上,结合软件仿真和实验测试对设计方案加以优化。首先从系统传递函数角度出发,揭示引发电路振荡的原因,即开环增益和反馈因子之间特定幅度和相位关系。在此基础上,利用TINA SPICE交流和瞬态仿真功能,以图解方式直观阐明振荡条件,并给出用于相位补偿的反馈电容取值不同时所测得的环路增益波特图,以及系统频率响应、阶跃响应和脉冲响应。对比上述仿真结果,讨论反馈电容对系统稳定性和带宽的影响,并进一步考虑稳定性和带宽,计算出补偿电容的理想取值。针对因电容过小而在应用中难以实现的问题,提出以T型阻容网络等效小电容的策略,并通过仿真加以验证。最后,对系统相位裕度和带宽进行了实验测试。结果表明,当补偿电容为5 pF时,相位裕度约为68.4°,过冲优于8%,未见振铃现象。 展开更多
关键词 光电二极管 开环增益 TINA SPICE 反馈因子 环路增益 相位裕度
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元宇宙场域下高校图书馆优秀传统文化SPICES模型构建
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作者 张锐 王小芳 綦晓卿 《文化产业》 2025年第29期166-168,共3页
元宇宙是一个虚实互通、虚实融合、虚实共振的可持续发展有机体,已成为学术界的研究热点,为图书馆推动中华优秀传统文化创新发展指明了方向。现在梳理元宇宙产生和发展、内涵和特征的基础上,解析、构建图书馆推动中华优秀传统文化创新... 元宇宙是一个虚实互通、虚实融合、虚实共振的可持续发展有机体,已成为学术界的研究热点,为图书馆推动中华优秀传统文化创新发展指明了方向。现在梳理元宇宙产生和发展、内涵和特征的基础上,解析、构建图书馆推动中华优秀传统文化创新发展的香料(SPICES)模型,即完整的时空结构、人“人”共生融合、沉浸式深刻体验、数字文化大繁荣、虚实结合的文化活动和可持续发展,以充分发挥元宇宙场域下图书馆的文化功能,提高图书馆推动中华优秀传统文化创新发展的成效,传承和弘扬中华优秀传统文化。 展开更多
关键词 优秀传统文化 高校图书馆 元宇宙 SPICES模型
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高压MOS器件SPICE建模研究
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作者 顾祥 彭宏伟 +1 位作者 纪旭明 李金航 《微处理机》 2025年第2期9-13,共5页
针对BSIM3v3模型在高压集成电路中高压MOS器件建模上的局限性,通过深入分析栅源电压和衬源电压对源漏电阻的影响,以及电流准饱和效应、碰撞电离电流、高压寄生管和自热效应等关键因素,提出一种基于BSIM3v3的高压MOS模型改进方法。该方... 针对BSIM3v3模型在高压集成电路中高压MOS器件建模上的局限性,通过深入分析栅源电压和衬源电压对源漏电阻的影响,以及电流准饱和效应、碰撞电离电流、高压寄生管和自热效应等关键因素,提出一种基于BSIM3v3的高压MOS模型改进方法。该方法通过引入不同的压控电阻(VCR)、受控电压源(VCVS)和受控电流源(CCCS)等子电路,构建了一个用于精确模拟高压MOS器件的SPICE Macro模型。这一改进显著提升了高压MOS器件的建模精度,对高压集成电路的设计与仿真具有重要的实际意义和应用价值。 展开更多
关键词 高压MOS SPICE模型 参数提取
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Hyppocras, the medieval wine remedy with an antique origin
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作者 Gregory Tsoucalas 《History and Philosophy of Medicine》 2025年第1期1-3,共3页
During the era of Middle Ages,throughout Europe,a mulled or spiced wine commonly consumed at the end of a meal as a digestive,sweetened with honey or containing sugar,named“Hyppocras”(or hypocras,hippocras,ypocras,i... During the era of Middle Ages,throughout Europe,a mulled or spiced wine commonly consumed at the end of a meal as a digestive,sweetened with honey or containing sugar,named“Hyppocras”(or hypocras,hippocras,ypocras,ipocras,Latin:Vinum Hippocraticum),was the most famous aperitif,having also a cluster of supposedly drug qualities[1,2].Hyppocras was regularly served as a digestive at the end of the meal,becoming symbolically the ceremonial conclusion of any banquet since 14th century[3].Evidence of the high regard Hyppocras enjoyed among the medieval lore is testified by the fact that a recipe of the wine enriched with rosewater and raisins,survived within the work“On Wines”written by one on the most esteemed physicians of the 13th century. 展开更多
关键词 sugar hyppocras rosewater honey RAISINS medieval wine mulled spiced wine DIGESTIVE
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基于BSIM-CMG紧凑模型的不同沟道外壳厚度n型核/壳NSFET的SPICE建模
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作者 王悦杨 马英杰 +4 位作者 白永林 吴佳颖 廉浩哲 唐敏 刘伟景 《半导体技术》 北大核心 2025年第4期339-344,共6页
对一种新型的Si/Ge-核/壳纳米片场效应晶体管(NSFET)进行了SPICE建模。使用TCAD仿真获得器件特性数据,结合伯克利短沟道绝缘栅场效应晶体管公共多栅(BSIM-CMG)紧凑模型,完成不同沟道外壳厚度的n型Si/Ge-核/壳NSFET的直流特性建模。通过... 对一种新型的Si/Ge-核/壳纳米片场效应晶体管(NSFET)进行了SPICE建模。使用TCAD仿真获得器件特性数据,结合伯克利短沟道绝缘栅场效应晶体管公共多栅(BSIM-CMG)紧凑模型,完成不同沟道外壳厚度的n型Si/Ge-核/壳NSFET的直流特性建模。通过分析核壳结构沟道的材料与结构设计特点及其导通原理,确立并修正了部分相关的物理参数,准确地描述了沟道外壳厚度改变引起的器件特性变化,完成核/壳NSFET的SPICE模型构建及验证。结果表明,单器件的直流特性参数的平均提取误差小于3%,验证误差小于5%。所建模型可以准确描述不同沟道外壳厚度的n型核/壳NSFET的器件特性,为核/壳NSFET的研发及仿真应用提供参考。 展开更多
关键词 核壳结构 纳米片场效应晶体管(NSFET) TCAD 伯克利短沟道绝缘栅场效应晶体管公共多栅(BSIM-CMG)紧凑模型 SPICE建模
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Metallomics of dill:Influence of environmental stress and contamination of commercial samples
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作者 Jozef Kovácik Lenka Husáková +2 位作者 Marek Vydra Martina Piroutková Jan Patocka 《Journal of Environmental Sciences》 2025年第11期478-488,共11页
Dill(Anethum graveolens),an annual species,was used to study the impact of metallic pollution potentially spreading fromthe nickel smelter dump in Dolna Streda(Slovakia)by monitoring 55 elements.Despite the proximity ... Dill(Anethum graveolens),an annual species,was used to study the impact of metallic pollution potentially spreading fromthe nickel smelter dump in Dolna Streda(Slovakia)by monitoring 55 elements.Despite the proximity of this dump(1 km),only soil Ni(54.8 mg/kg)or Pb(47.3 mg/kg),but not Cr,Mn,Fe or Co(main elements of the dump’s sludge)was elevated in given garden soil compared to two control sites.Mainly flowers and/or leaves contained significantly higher amounts of Ni,Cr,Pb,Cu,As,Sb,Sn,V,W,and some rare earth elements at the site close to the dump.Correlation between elements in organs and soil was significant mainly in stem or root but the bioaccumulation factor was typically low(<0.02)for most elements.A positive finding was that the 2022/2024 comparison revealed a decline in most elements in dill leaves,even at the dump site,which may reflect a decrease in the content of air PM particles.Soluble phenols were less accumulated in plants close to the nickel smelter dump,but flavonols showed the opposite trend,and free amino acids were positively correlated with many elements in the stem and root.An evaluation of commercial dill samples revealed variability(e.g.,up to 0.7 mg Cd/kg dry weight)but subsequent NCA and PCA analyses clearly separated the dump locality from other samples.However,significant differences in the content of Cd,Ni,Pb,As,and other elements encourage precise control of commercially available dill dry matter. 展开更多
关键词 BIOACCUMULATION Heavy metals Plant metabolites Soil pollution SPICE
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Pesticidal and Medicinal Value of Turmeric and Ginger in Tanzania and Their Antifungal Activity against Phytopathogens
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作者 Geraldin M. W. Lengai Ernest R. Mbega James W. Muthomi 《Journal of Biosciences and Medicines》 2025年第2期287-308,共22页
Use of synthetic pesticides to manage crop pests has had a toll on human health, environmental safety and farmer’s income creating a need for alternative crop protection strategies. Botanical pesticides have been rep... Use of synthetic pesticides to manage crop pests has had a toll on human health, environmental safety and farmer’s income creating a need for alternative crop protection strategies. Botanical pesticides have been reported to be effective in managing crop pests, and a number of them have been formulated and commercialized. This study was conducted in North-Eastern Tanzania to establish the pesticidal and medicinal value of turmeric (Curcuma longa) and ginger (Zingiber officinale). Purposive sampling was adopted to select and interview 167 respondents drawn from farmers, traders, pharmaceutical shops, agro-shop operators and consumers of turmeric and ginger. Ginger and turmeric rhizomes were also collected for extraction, antifungal assay and biochemical analysis. Results showed that majority of the respondents were aware of the medicinal value of ginger and turmeric, with 59.5% having used the plants to treat respiratory related infections and healing skin surface and internal wounds. About 14% of farmers were aware of and had used aqueous botanical preparations from neem, moringa and Tephrosia to manage insect pests. Only 2.7% of farmers had used ginger powder as a protective insecticide on stored grains. Ginger and turmeric rhizome extracts showed high antifungal activity against Pythium (83% - 95%), Fusarium oxysporum f. sp. lycopersici (34% - 52%) and Alternaria solani (38% - 53%). A GC-MS analysis of ginger and turmeric extracts showed presence of α-zingiberene, β-sesquiphellandrene, α-farnesene, ar-curcumene, α-copaene, ar-tumerone and curlone. This study recommends that ginger and turmeric extracts be considered for development of a botanical pesticide and especially for management of damping off diseases. 展开更多
关键词 Botanical Pesticides Curcuma longa Medicinal Plants SPICES Zingiber officinale
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Nutritional and Sensory Characteristics of Spices Based on Local Ingredients Formulated by the Design of Experiments Methodology
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作者 Kanté-Traoré Hyacinthe Inoussa Ky +3 位作者 Jean Axel T. Kaboré Micheline Millogo Ella R. Compaoré Mamoudou H. Dicko 《Open Journal of Applied Sciences》 2025年第1期98-109,共12页
A spice formulation study in Burkina Faso was carried out using local ingredients for the benefit of households. The objective of this study was to propose some spice formulations based on local ingredients in order t... A spice formulation study in Burkina Faso was carried out using local ingredients for the benefit of households. The objective of this study was to propose some spice formulations based on local ingredients in order to reduce the use of chemical spices in the preparation of different dishes. The Design of Experiments (DOE) methodology was used for the formulation of the spices and their physicochemical, nutritional and sensory characteristics were evaluated by standardized and standard methods. The results obtained showed lipid contents (g/100 g DM) ranging from 10.41 ± 0.26 to 15.64 ± 0.68, total sugars from 4.39 ± 0.32 to 5.46 ± 0.31, protein from 3.65 ± 0.17 to 12.04 ± 0.35 and ash from 5.83 ± 0.01 to 7.02 ± 0.01. The polyphenol content ranged from 9.09 ± 1.60 to 11.33 ± 0.90, and the flavonoid content ranged from 0.65 ± 0.03 to 1.08 ± 0.13. The sensory analysis carried out showed that the spices have generally satisfactory organoleptic characteristics. These results constitute new information in the diet of populations and are an alternative to the chemical spices used in their cooking. 展开更多
关键词 FORMULATION SPICES Design of Experiment Biochemical Characteristics
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Phytobiotics in poultry:revolutionizing broiler chicken nutrition with plant‑derived gut health enhancers
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作者 Uchechukwu Edna Obianwuna Xinyu Chang +4 位作者 Vivian U.Oleforuh‑Okoleh Patience N.Onu Haijun Zhang Kai Qiu Shugeng Wu 《Journal of Animal Science and Biotechnology》 2025年第1期1-33,共33页
As the global population continues to expand,the demand for broiler chicken production to supply safe and high-quality meat is increasing.To meet this ever-growing demand,broiler chickens with enhanced growth performa... As the global population continues to expand,the demand for broiler chicken production to supply safe and high-quality meat is increasing.To meet this ever-growing demand,broiler chickens with enhanced growth performance are being developed,but they often face challenges related to oxidative stress,which can adversely affect gut health.Phytobiotics,which are plant-derived feed additives known for their antimicrobial,antioxidant,immune-modulating,and growth-promoting properties,have emerged as promising natural alternatives to synthetic antibiotics.This review consolidates recent advancements in the use of phytobiotics-derived products from leaves,roots,seeds,flowers,and their extracts in broiler diets reared under standard experimental conditions,without the introduction of stressors.The focus is on elucidating the key mechanisms through which phytobiotics improve gut health,includ-ing their effects on gut morphology,integrity,microflora composition,antioxidant capacity,and immune function.The review highlights the potential of phytobiotics to revolutionize broiler nutrition by acting as natural enhancers of gut health.Research findings reveal that phytobiotics significantly improve intestinal health,and boost growth per-formance,offering a sustainable approach to managing to gut dysfunction.These findings indicate a potential shift in how gut-health related challenges in broilers can be addressed,moving towards natural phytobiotic therapy.How-ever,several challenges persist.Optimizing the dosage of phytobiotics,ensuring consistent performance,and over-coming the limitations related to their extraction and application are key areas requiring further investigation.The review emphasizes the importance of continued research to refine phytobiotic formulations,explore synergistic effects,and incorporate advanced technologies such as AI-driven methods and precision nutrition to tailor feeding strategies more effectively.Additionally,the development of innovative delivery systems,such as nanoencapsula-tion,is suggested as a way to enhance the effectiveness and reliability of phytobiotics.By highlighting the potential of phytobiotics to revolutionize broiler nutrition,this review supports the poultry industry’s shift towards antibiotic-free and sustainable dietary solutions,offering new perspectives on the future of broiler chicken production. 展开更多
关键词 BROILERS Essential oils Gut health Herbs and spices Phytobiotics Plant extracts
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基于电噪声分析的智能网联汽车ADAS电路系统故障检测方法
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作者 刘向辰 《甘肃科技》 2025年第6期43-47,共5页
作为新一代电力电子技术、信息网络技术及通信技术高度融合的产物,智能网联汽车内部电路的复杂性和耦合性较高,如何快速、准确分析出车辆内部ADAS电路系统的故障是现阶段急需解决的问题。在以往研究的基础上,文章提出一种基于电噪声检... 作为新一代电力电子技术、信息网络技术及通信技术高度融合的产物,智能网联汽车内部电路的复杂性和耦合性较高,如何快速、准确分析出车辆内部ADAS电路系统的故障是现阶段急需解决的问题。在以往研究的基础上,文章提出一种基于电噪声检测的智能网联汽车ADAS电路系统故障分析方法,该方法以TMS320F28335数字信号芯片为硬件架构,融合SPICE计算机程序对智能网联汽车内部ADAS电路进行电噪声分析。通过实验平台,验证了该方案能够准确判断出车辆内部复杂电路故障的具体位置和故障原因,提高了智能网联汽车核心电路检测和故障排除的精准性、可靠性及快速性。 展开更多
关键词 智能网联汽车 ADAS电路 电噪声分析 SPICE
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一种基于SPICE宏模型的IBIS模型建模方法
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作者 刘丕均 《信息产业报道》 2025年第8期0011-0013,共3页
输入 / 输出缓冲器信息规范(Input/Output Buffer Informational Specification, IBIS)模型是高速 I/O 电路设计中广泛使用的行为级模型,其通过多组查找表描述 I/O 特性。然而,目前仅商业 SPICE 仿真器支持 IBIS 模型,尚无开源 SPICE ... 输入 / 输出缓冲器信息规范(Input/Output Buffer Informational Specification, IBIS)模型是高速 I/O 电路设计中广泛使用的行为级模型,其通过多组查找表描述 I/O 特性。然而,目前仅商业 SPICE 仿真器支持 IBIS 模型,尚无开源 SPICE 工具可实现该功能。为了实现 IBIS 模型能被大多数开源 SPICE 工具支持,促进国产 EDA 工具的发展,提出一种将 IBIS 模型转换为基于纯 SPICE 元件的等效宏模型的建模方法,使得几乎所有开源 SPICE 工具均可利用 IBIS 模型信息进行瞬态仿真。通过将瞬态仿真结果与商业 SPICE 仿真器对比,验证了该 SPICE 宏模型转换方法的有效性和实用性。 展开更多
关键词 IBIS 模型 行为级模型 SPICE 仿真 信号完整性
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Brewed With Taste
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作者 MA LI 《ChinAfrica》 2025年第5期26-27,共2页
Nujiang’s coffee industry expands in a booming domestic market.It takes about 20 minutes to drive from Liuku Town in Nujiang Lisu Autonomous Prefecture,Yunnan Province,to the Nujiang Green Spice Industrial Park on a ... Nujiang’s coffee industry expands in a booming domestic market.It takes about 20 minutes to drive from Liuku Town in Nujiang Lisu Autonomous Prefecture,Yunnan Province,to the Nujiang Green Spice Industrial Park on a road along the Nujiang River.Located at the foot of the Gaoligong Mountains,the west bank of the Nujiang River is home to the largest specialty coffee-growing area in China. 展开更多
关键词 brewed coffee industry Gaoligong Mountains nujiang green spice industrial park domestic market driving time nujiang river specialty coffee
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SPICES模式在实验诊断学临床实践教学中的应用初探
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作者 杨玉静 罗盈 +5 位作者 葛艳芬 王春苗 向微 邸玉玮 顾兵 邓倩昀 《标记免疫分析与临床》 2025年第3期638-643,共6页
目的探讨SPICES模式在实验诊断学临床实践教学中的实施效果。方法选取华南理工大学五年制临床医学本科专业2020级和2021级学生共125人为研究对象。其中创新组(60名)采用SPICES模式教学;传统组(65名)采用传统模式教学。比较两组学生的理... 目的探讨SPICES模式在实验诊断学临床实践教学中的实施效果。方法选取华南理工大学五年制临床医学本科专业2020级和2021级学生共125人为研究对象。其中创新组(60名)采用SPICES模式教学;传统组(65名)采用传统模式教学。比较两组学生的理论成绩及实践成绩,统计两组学生对教学效果的主观评价。结果创新组与传统组理论成绩(62.58±8.63 vs 63.04±8.99)和实践课前小测成绩(73.75±20.78 vs 67.69±24.80),差异无统计学意义(P>0.05);实践成绩(83.53±10.54 vs 69.81±17.46)和实践课后小测成绩(81.67±17.87 vs 72.73±29.12),差异有统计学意义(P<0.001)。创新组学生对教学评价优于传统组(P<0.001)。结论在实验诊断学临床实践教学中应用SPICES模式有利于培养了学生的学习力、思辨力和临床胜任力,具有一定的推广价值,为医学教育领域提供了新的教学改革思路。 展开更多
关键词 SPICES模式 实验诊断学 临床实践
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Zhangcha Duck (Spiced and Smoked Duck)
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作者 A RONG 《Women of China》 2000年第5期53-,共1页
Preparation: Buy a ready cooked Zhangcha Duck—a kind of duck stewed in sugar, spiced with tea leaves and smoked, which can be bought at the takeout departments of many Chinese restaurants. Bring the duck home and fry... Preparation: Buy a ready cooked Zhangcha Duck—a kind of duck stewed in sugar, spiced with tea leaves and smoked, which can be bought at the takeout departments of many Chinese restaurants. Bring the duck home and fry in oil until the skin is crisp. Slice thickly and serve with steamed bread, 展开更多
关键词 spiced and Smoked Duck Zhangcha Duck
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一种支持SoC数字电路老化及寿命的评估方法 被引量:1
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作者 陈朝晖 张弛 +3 位作者 刘玮 宋玉祥 刘潇骁 唐诗怡 《微电子学》 CAS 北大核心 2024年第3期511-516,共6页
使用Spice可靠性仿真技术和高温稳态寿命(HTOL)实验相结合的方法,研究不同的MOSFET器件组成的环振电路在持续翻转状态下,不同应力时间和应力电压对其寿命退化的影响。依据仿真结果和Power-Law模型建立数字电路的寿命预测理论模型。通过H... 使用Spice可靠性仿真技术和高温稳态寿命(HTOL)实验相结合的方法,研究不同的MOSFET器件组成的环振电路在持续翻转状态下,不同应力时间和应力电压对其寿命退化的影响。依据仿真结果和Power-Law模型建立数字电路的寿命预测理论模型。通过HTOL实验验证模型的准确性。结果表明,随着时间的增加,器件的寿命退化率逐渐增加,且随着时间的推移,寿命的变化率越来越小。随着应力电压的增加,器件的寿命退化率更快趋向于稳定。器件退化符合R-D模型,仿真结果与试验结果高度,进一步证实了本模型对SoC数字电路寿命预测的准确性。通过这种组合仿真和实验的方法,可以更加准确地评估数字电路的寿命,为芯片制造过程中的可靠性设计提供参考。 展开更多
关键词 SoC数字电路 环振电路 SPICE仿真 Power-Law模型 R-D模型 高温稳态寿命
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半导体激光器驱动器的SPICE仿真及其在气体传感系统的应用 被引量:1
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作者 丛梦龙 周昆鹏 《现代电子技术》 北大核心 2024年第18期77-82,共6页
为了提高激光器的工作可靠性和稳定性,借助TINA-SPICE软件对其驱动电路进行辅助设计,并通过电调制和光电检测系统实验检验设计效果。对驱动器的恒流输出电路的幅频特性和瞬态响应进行仿真,预测潜在的电流振荡现象,并提出一种用于补偿环... 为了提高激光器的工作可靠性和稳定性,借助TINA-SPICE软件对其驱动电路进行辅助设计,并通过电调制和光电检测系统实验检验设计效果。对驱动器的恒流输出电路的幅频特性和瞬态响应进行仿真,预测潜在的电流振荡现象,并提出一种用于补偿环路增益的易用方案。通过对比补偿前后的仿真曲线,验证了该方案的可行性。在此基础上,以STM32H743作为中央处理核心,通过触摸屏图形化设置和监测驱动电流参数,从而调度激光器驱动电路的运行。在296 K环境温度下,利用该电路进行半导体激光器电调制特性实验,通过拟合波长与电流得到调制系数为0.045 cm-1/mA。进一步地,将该控制器引入基于红外光谱吸收技术的气体传感系统,完成了对甲烷气体的定量分析。分析结果表明,所设计的电路能稳定地驱动激光器并实现对波长的精准调制,获得的气体传感系统的检测下限低于8 ppm。 展开更多
关键词 半导体激光器 驱动电路 压控电流源 SPICE仿真 气体传感器 电调制 环路增益
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单光子雪崩二极管SPICE仿真模型的建立和应用 被引量:1
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作者 匡华 鞠国豪 +1 位作者 徐星 程正喜 《半导体光电》 CAS 北大核心 2024年第1期42-48,共7页
单光子雪崩二极管(SPAD)作为一种高效的光子探测器件被广泛应用于量子通信和三维成像等领域。在Cadence中建立了一个SPAD的Spice模型,通过Verilog-A语言,采用两个e指数函数的组合,以连续函数的方式描述了SPAD在盖革模式区等效电阻的动... 单光子雪崩二极管(SPAD)作为一种高效的光子探测器件被广泛应用于量子通信和三维成像等领域。在Cadence中建立了一个SPAD的Spice模型,通过Verilog-A语言,采用两个e指数函数的组合,以连续函数的方式描述了SPAD在盖革模式区等效电阻的动态变化。这两个e指数函数分别体现了高阻区和低阻区的等效电阻特性,解决了分段电阻模型仿真不收敛的问题。该Spice模型模拟了SPAD器件在“接收光子-雪崩产生脉冲-淬灭-复位”工作过程中的动态特性和SPAD从正偏到二次击穿的静态I-V特性。将其应用到4种不同淬灭电路的仿真中,验证了该模型的有效性和稳定性。 展开更多
关键词 单光子雪崩二极管 SPICE模型 Cadence仿真 淬灭电路 门控模式
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基于X射线晶圆在线辐照实验的16 nm n-FinFETs总剂量效应模型研究
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作者 魏雪雯 郑齐文 +2 位作者 崔江维 李豫东 郭旗 《现代应用物理》 2024年第4期116-123,共8页
建立了基于X射线晶圆在线辐照实验的16 nm FinFET总剂量效应模型,并对模型的有效性进行了验证。将辐照后器件等效为一个主晶体管与辐射导致的若干寄生晶体管并联,通过改变寄生晶体管的参数对辐照中的物理机制进行了模拟。对不同鳍片数... 建立了基于X射线晶圆在线辐照实验的16 nm FinFET总剂量效应模型,并对模型的有效性进行了验证。将辐照后器件等效为一个主晶体管与辐射导致的若干寄生晶体管并联,通过改变寄生晶体管的参数对辐照中的物理机制进行了模拟。对不同鳍片数量的内核(core)和输入输出(input output,IO)n-FinFET建立了能够描述器件在不同漏源电压下工作性能的模型,仿真结果与实验数据对比表明,所建立的模型的相对均方根偏差小于15%。 展开更多
关键词 FINFET 总剂量效应 SPICE模型 辐射损伤 器件可靠性
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自主可控EDA金光SPICE的技术特点及应用方法研究
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作者 余菲 曹志强 《深圳职业技术大学学报》 CAS 2024年第1期74-79,共6页
作为集成电路EDA工具,金光SPICE能够有效解决我国缺乏自主知识产权集成电路EDA工具的问题,能助力提升我国集成电路教育水平和设计水平。通过详细分析金光SPICE的技术特点,结合国产工艺及器件模型库,利用金光SPICE软件的高性能、高精度... 作为集成电路EDA工具,金光SPICE能够有效解决我国缺乏自主知识产权集成电路EDA工具的问题,能助力提升我国集成电路教育水平和设计水平。通过详细分析金光SPICE的技术特点,结合国产工艺及器件模型库,利用金光SPICE软件的高性能、高精度、高兼容性等优点,提出了从电路图绘制到SPICE仿真的完整设计流程。基于上述流程,讨论分析了反相器链和施密特触发器电路的原理,并利用金光SPICE完成了电路的设计与验证,证明基于金光SPICE的集成电路设计方法能够有效地提高集成电路设计的质量和效率,降低设计的成本和风险,具有较强的实用价值和推广意义。 展开更多
关键词 EDA 金光 SPICE 反相器链 施密特触发器
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