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MOS存储器的图案灵敏性

电子计算机动态 1975年第6期 95-98页

作者： j.r.brown 苏光荣

对来自许多厂家的1103型存储器大量测试和鉴定结果进行了分析。测试结果表明,部件对动态测试图案是灵敏的。灵敏度随不同厂家和掩模的修改而有所差异。对于有些厂家的产品,必需用全部15秒钟的测试序列才行,而有的厂家的产品则用3或4秒... 详细信息

对来自许多厂家的1103型存储器大量测试和鉴定结果进行了分析。测试结果表明,部件对动态测试图案是灵敏的。灵敏度随不同厂家和掩模的修改而有所差异。对于有些厂家的产品,必需用全部15秒钟的测试序列才行,而有的厂家的产品则用3或4秒的简化测试就可以了。随着工作的进展,将来我们或许会找到新的图案,以证明比过去所用图案都更灵敏。每个厂家的产品将得出它自己的特殊的灵敏性。为获得这些潜在问题的线索,每种新产品的线路和版图都要考察,并画出内部电压序列的曲线。要制作可靠的存储系统,这样广泛的分析是重要的。

关键词：地址厂家图案存储器存贮器计算机参考单元 MOS 动态测试灵敏性

乳品厂废水处理的石灰凝积污泥在饲料生产中的利用

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国外畜牧学（草原与牧草） 1992年第2期 27-30页

作者： j.r.brown W.A.Bough Calvin Hoenshell 赵楠罗杨

本试验以乳品厂废水处理的石灰凝积淤泥(LSS)作为高羊茅草(Festucaarundinacea Shreb.)草地石灰和P的来源,在淤积壤土上用田间试验对其效果作了评价。大约101022L/ha的初次处理可显著地增加干草的产量,并使表层土壤(0～7.62cm)的pH和P... 详细信息

本试验以乳品厂废水处理的石灰凝积淤泥(LSS)作为高羊茅草(Festucaarundinacea Shreb.)草地石灰和P的来源,在淤积壤土上用田间试验对其效果作了评价。大约101022L/ha的初次处理可显著地增加干草的产量,并使表层土壤(0～7.62cm)的pH和P超过高羊茅草对pH和1号布朗一克茨磷浸提剂(Bray and Kurtz)的需求水平。要获得最大的羊茅草产量,施用石灰沉积污泥还需要补充N和K。在LSS中含有足量的石灰可以消除4年中施用NH_4NO_3作表层肥料而产生的酸化效应。

关键词：乳品厂废水饲料污泥羊茅草

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耕种100年后土壤物理特性的变化

水土保持科技情报 1992年第2期10卷 46-49,56页

作者： S.H.Anderson C.j.Gantzr j.r.brown 李健

在密苏里大学的Sanborn试验田,我们针对土地经100年的连续耕种对土壤特性有何影响这一问题进行了研究和评价.用未受扰动的土壤芯来评价土壤的容重、渗透能力、持水性和毛管孔隙分布.结果表明,施厩肥的土壤容重比不施肥地要小0.12g/cm^3... 详细信息

在密苏里大学的Sanborn试验田,我们针对土地经100年的连续耕种对土壤特性有何影响这一问题进行了研究和评价.用未受扰动的土壤芯来评价土壤的容重、渗透能力、持水性和毛管孔隙分布.结果表明,施厩肥的土壤容重比不施肥地要小0.12g/cm^3,年施肥量为13.5t/ha的试验田的渗透能力比不施肥试验田要增加9倍.虽然耕种对土壤的容重影响很微弱,但对渗透能力的影响很大,这就意味着施肥能减少地表径流和降低土壤侵蚀.

关键词：土壤物理特性

对连续种植100年的Sanborn试验地土壤侵蚀的评价

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水土保持科技情报 1992年第3期10卷 23-27,18页

作者： C.j.Gantzer S.H.Anderson.A.L.Thompson j.r.brown 宗少云

Sanborn试验地建立于1888年,是密西西比河西部建立最早的一个农业试验地.它为长期作物轮作和土壤管理,包括每年的施肥对土壤侵蚀以及这些技术措施的持续性的影响提供了可靠的依据.对各试验小区中连作玉米的、连作梯牧草的和6年一轮玉米... 详细信息

Sanborn试验地建立于1888年,是密西西比河西部建立最早的一个农业试验地.它为长期作物轮作和土壤管理,包括每年的施肥对土壤侵蚀以及这些技术措施的持续性的影响提供了可靠的依据.对各试验小区中连作玉米的、连作梯牧草的和6年一轮玉米、燕麦、小麦、三叶草及2年梯牧草轮作的连续耕作100年后的表土保留情况进行了分析.结果表明,种植100年后的连作玉米小区比6年一轮梯牧草小区保留的表土有明显减少.连作玉米小区保留的表土只相当于梯牧草小区的44%.而轮作小区则相当于梯牧草小区的70%.连作玉米小区耕层的粘土含量比轮作和梯牧草小区有显著增高,而且玉米小区还出现耕层与底层粘土混合的现象.据测产表明,在有侵蚀的小区即使施用大量肥料,其玉米产量仍比无侵蚀小区减产60%.因此,如果要持续长期生产就必须改进条播耕作管理工作.

关键词：土壤侵蚀评价

A review of public health guidelines for postpartum physical activity and sedentary behavior from around the world

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journal of Sport and Health Science 2024年第4期13卷 472-483,F0003页

作者： Kelly r.Evenson Wendy j.brown Alison K.Brinson Emily Budzynski-Seymour Melanie Hayman Department of Epidemiology Gillings School of Global Public HealthUniversity of North Carolina at Chapel HillChapel HillNC 27599-8050USA Faculty of Health Sciences and Medicine Bond UniversityGold CoastQLD 4226Australia School of Human Movement and Nutrition Sciences The University of QueenslandBrisbaneQLD 4072Australia Department of Anthropology University of North Carolina at Chapel HillChapel HillNC 27599-3115USA Carolina Population Center University of North Carolina at Chapel HillChapel HillNC 27599-8120USA Faculty of Sport Health and Social SciencesSolent UniversitySouthamptonSO140YNUK Appleton Institute School of HealthMedical and Applied SciencesCentral Queensland UniversityRockhamptonQLD 4701Australia

Background:The period following pregnancy is a critical time window when future habits with respect to physical activity(PA) and sedentary behavior(SB) are established;therefore,it warrants *** purpose of this scoping review was to summarize public health-oriented country-specific postpartum PA and SB guidelines ***:To identity guidelines published since 2010,we performed a(a) systematic search of 4 databases(CINAHL,Global Health,PubMed,and SPOrTDiscus),(b) structured repeatable web-based search separately for 194 countries,and(c) separate web-based *** the most recent guideline was included for each ***:We identified 22 countries with public health-oriented postpartum guidelines for PA and 11 countries with SB *** continents with guidelines included Europe(n=12),Asia(n=5),Oceania(n=2),Africa(n=1),North America(n=1),and South America(n=1).The most common benefits recorded for PA included weight control/management(n=10),reducing the risk of postpartum depression or depressive symptoms(n=9),and improving mood/well-being(n=8).Postpartum guidelines specified exercises to engage in,including pelvic floor exercises(n=17);muscle strengthening,weight training,or resistance exercises(n=13);aerobics/general aerobic activity(n=13);walking(n=11);cycling(n=9);and swimming(n=9).Eleven guidelines remarked on the interaction between PA and breastfeeding;several guidelines stated that PA did not impact breast milk quantity(n=7),breast milk quality(n=6),or infant growth(n=3).For SB,suggestions included limiting long-term sitting and interrupting sitting with ***:Country-specific postpartum guidelines for PA and SB can help promote healthy behaviors using a culturally appropriate context while providing specific guidance to public health practitioners.

关键词： Breastfeeding Caesarean section Guidelines Postnatal recommendations

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超弦一种包罗万象的理论? 1

Gene therapy for spinal muscular atrophy:perspectives on the possibility of optimizing SMN1 delivery to correct all neurological and systemic perturbations

丛书名：科学与人译丛

1994年

作者：（英）P.C.W.戴维斯（P.C.W.Davies）（英）j.r.布朗（j.r.brown）廖力章人杰译

英文题名:Superstrings:A theory of everything?

ISBN: (数字)7500102593

ISBN: (纸本)7500102593

英文题名:Superstrings:A theory of everything?

关键词：超弦研究概况

来源：汇雅图书（南通市图书馆... 评论

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Neural regeneration research 2025年第7期20卷 2011-2012页

作者： Sharon j.brown rafael j.Yáñez-Muñoz Heidi r.Fuller School of Pharmacy and Bioengineering Keele UniversityKeeleUK Wolfson Center for Inherited Neuromuscular Disease TORCH BuildingRJAH Orthopaedic HospitalOswestryUK *** Center of Gene and Cell TherapyDepartment of Biological SciencesSchool of Life Sciences and the EnvironmentRoyal Holloway University of LondonEghamUK

Spinal muscular atrophy(SMA)is a genetic condition that results in selective lower motor neuron loss with concomitant muscle weakness and *** genetic cause of SMA was understood in 1995 when loss or impairment of the survival motor neuron 1(SMN1)gene was identified as the main contributing factor(Lefebvre et al.,1995).This,in combination with the discovery that humans have a“back-up”gene,SMN2,which can produce low levels(approximately 10%)of the full-length functional SMN protein,has led to the generation of SMA-specific gene *** was traditionally classified according to age of symptom onset and developmental milestones achieved,with life expectancy and severity varying between ***,SMN2 copy number is used as a proxy for the prediction of disease severity,with higher SMN2 copy number typically being associated with reduced severity of SMA,although this relationship is not absolute:some individuals with low SMN2 copy number have less severe SMA phenotypes and vice ***,the etiology of SMA is further complicated by other factors,such as non-typical nucleotide variants and SMN2-independent modifiers of disease severity.

关键词： atrophy traditionally absolute

Exploring the effects of anthropogenic disturbance on predator inspection activity in Trinidadian guppies

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Current Zoology 2024年第1期70卷 109-111页

作者： Alix j.P Brusseau Laurence E.A.Feyten Adam L.Crane Grant E.brown Department of Biology Concordia UniversityMontrealQCH4B 1R6Canada Department of Biomedical Sciences WCVMUniversity of SaskatchewanSaskatoonSKCanada

Prey animals are often faced with uncertainty due to having imperfect information regarding current local conditions,including predation risks and the availability of reliable foraging opportunities(Dall 2010).As this uncertainty increases,the probability of making costly behavioral errors also increases,leading to more risk averse behavioral tactics(Feyten et al.2019).For example,Trinidadian guppies Poecilia reticulata are far more risk averse when faced with multiple unknown sources of risk assessment information than when faced with a mix of known and unknown cues(Feyten et al.2019).Prey can reduce uncertainty by gathering and integrating private and social information regarding current risk levels within microhabitats(Dall 2010;Munoz and Blumstein 2012).

关键词： human disturbance information availability information reliability predator-prey interactions risk assessment uncertainty

Mathematical modelling of ball and plate system with experimental and correlation function-based model validation

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Control Theory and Technology 2024年第2期22卷 326-341页

作者： T.r.Dil Kumar S.j.Mija Department of Electrical Engineering National Institute of Technology CalicutKozhikode673601KeralaIndia

The ball and plate system is an inherently nonlinear under actuated benchmark system used for validating the performance of various control schemes. A mathematical model depicting the dynamics close to that of the system is very much required for such a test bed. In this correspondence, the complete nonlinear model, a simplified nonlinear model, and a linearized model of the ball and plate system are developed. The system comprises a ball and plate mechanism and a rotary servo unit. The ball and plate mechanism is modelled using the Euler–Lagrange method, whereas the rotary servo subsystem is modelled from the first principles. The nonlinear model of the combined system is developed by including the dynamics of the servo motor with gear and rolling resistance between the ball and the plate. The simplified nonlinear model of the system is obtained with suitable assumptions. The model is linearized around the operating point using the jacobian. The validity of the developed models is investigated through correlation function analysis. The open-loop response of the three models, viz., nonlinear, simplified nonlinear, and linearized models, is analyzed in the MATLAB/Simulink platform. Since the open-loop system is unstable, the experimental validation of the model is performed with a double-loop PSO (particle swarm optimization) PID control scheme.

关键词： Ball and plate system Correlation function Model validation Particle swarm optimization(PSO) PSO PID controller