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Asian pacific Journal of Reproduction 2021年第5期10卷 232-238页

作者： Hanane Derbak Mohamed Moussaoui Amine Benberkane Abdelhanine Ayad Department of Biological Sciences of the Environment Faculty of Nature and Life SciencesUniversitéde Bejaia06000 BejaiaAlgeria

Objective:To determine the in-vitro effect of the total alkaloid extract of Peganum(P.)harmala seeds on ram epididymal sperm.Methods:Semen was divided into six groups according to the following concentrations of the P.harmala total alkaloids:1,5,10,50,and 100μg/mL,and the control group.The samples were incubated at ambient temperature(21℃-24℃)for 24 h,and analyzed in terms of motility,membrane integrity,and oxidative status.Results:The sperm kinematic parameters,i.***.straight-line velocity,curvilinear velocity,average path velocity,were significantly higher when treated with P.harmala at concentrations ranging from 1 to 10μg/mL compared to the control group(Pram epididymal sperm was concentration-dependent and significantly different compared to the control group(Pram epididymal sperm treated with concentrations 1,5,and 10μg/mL of P.harmala extracts compared to the control group(P>0.05).Conclusions:Low concentrations(1-10μg/mL)of P.harmala extracts stimulate sperm motility,preserve membrane integrity and protect ram spermatozoa from lipid peroxidation.

关键词： Alkaloids Epididymal sperm Motility Peganum harmala ram Semen Membrane integrity Lipid peroxidation 1.Introduction

Effects of extender and packaging method on morphological and functional characteristics of cryopreserved Ossimi ram semen

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Asian pacific Journal of Reproduction 2020年第3期9卷 148-155页

作者： Wael A.Khalil Abdel-Khalek E.Abdel-Khalek Laura Falchi Bedir E.El-Saidy Ahmed I.Yousif Department of Animal Production Faculty of AgricultureMansoura UniversityMansoura35516Egypt Department of Veterinary Medicine Section of Obstetrics and GynecologyUniversity of SassariSassari07100Italy Animal Production Research Institute Agriculture Research CentreMinistry of AgricultureEgypt

Objective:To test the effects of extenders and packaging methods on morphological and functional characteristics of frozen thawed Ossimi ram semen.Methods:ram semen was pooled,diluted in 3 different extenders:Tris-egg yolk(TEY),Tris-soybean lecithin(TSBL),and Tris-butylatedhydroxytoluene(TBHT),equilibrated at 5℃for 4 h,and packaged in straws or pellets for freezing.Semen was evaluated for sperm progressive motility,viability,abnormality,and membrane integrity after dilution,equilibration and thawing.The percentages of viable,early apoptotic,apoptotic,and necrotic spermatozoa as well as comet assay parameters were determined in post-thawed semen.Total antioxidants capacity,malondialdehyde and lactic dehydrogenase were assayed in thawed seminal plasma.Results:After equilibration,only sperm membrane integrity was significantly higher(Pram semen cryopreserved with TEY gives the best physical,morphological and functional characteristics in straws compared with pellets,followed by semen diluted with TSBL.However,semen diluted with TBHT or TSBL,regardless of packaging method,showed the highest impact on antioxidant status of cyopreserved ram semen.

关键词： Cryopreservation Egg-yolk Lecithin Sperm Ossimi ram

Effects of penicillamine, hypotaurine, and epinephrine on motility, hyperactivity, acrosome reaction of fresh ram sperm

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Asian pacific Journal of Reproduction 2017年第6期6卷 283-288页

作者： K.H.El-Shahat M.I.Taysser M.R.Badr K.A.Zaki Department of Theriogenology Faculty of Veterinary MedicineCairo University Department of Animal Reproduction and Artificial Insemination Reproduction Research Institute Agriculture Research CenterEgypt El-Shieh Zaied Veterinary Clinic Egypt

Objective:To determine the effects of different concentrations of penicillamine, hypotaurine, and epinephrine (PHE) as well as incubation time on motility, hyperactivity and acrosome reaction (AR) of ram spermin vitro.Methods: Freshly ejaculated spermatozoa from three ram were collected, pooled and subjected to swim up technique in modified sperm Tyrode's albumin lactate pyruvate medium supplemented with different concentrations of PHE (10, 20, 30, 40, 50, 75 and 100 mM/mL). Then best concentrations were compared and examined for motility, hyperactivity and AR.Results: A high concentrations of PHE (30, 40, 50, 75 and 100mM/mL) showed a significant increase in motility when compared to control immediately after dilution and exist for the first and second hour of incubation period. However, when longer incubation time were used, a significant (Pram spermatozoa with 75 mM/mL PHE for 4 h before being used in insemination was considered the best concentration of PHE to be used in the process ofin-vitro fertilization.

关键词： ram sperm Capcitation Hyperactivation Acrosome reaction PHE VF

Reliability,Availability,Maintainability(ram)study,on reciprocating compressors API 618

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Petroleum 2017年第2期3卷 266-272页

作者： Francesco Corvaro Giancarlo Giacchetta Barbara Marchetti Maurilio Recanati Dipartimento di Ingegneria Industriale e Scienze Matematiche(DIISM) Universita Politecnica delle MarcheVia Brecce Bianche 12AnconaItaly Facolta di Ingegneria Universita degli Studi eCampusVia Isimbardi10NovedrateCOItaly

The Oil&Gas industry has continuously increased its requirements and together with the high complexity of technological systems and the higher competitiveness of markets,has compelled providers to implement adequate management strategies for these systems in order to improve their availability and productivity to meet those more demanding criteria.In this context,the complex of ram factors constitute a strategic approach for integrating reliability,availability and maintainability,by using methods,tools and engineering techniques(Mean Time to Failure,Equipment down Time and System Availability values)to identify and quantify equipment and system failures that prevent the achievement of the productive objectives.The application of such methodologies requires a deep experience and know-how together with the possibility of acquiring and processing data in operating conditions.This paper presents the most relevant aspects and findings of a study conducted for assessing the operational performance of a reciprocating compressor system package installed and used in the oil and gas'industries.The study was based on the analysis of the behaviour of states defined for each individual parts and component of reciprocating compressor and also aimed to identify and evaluate the effects of ramtype factors and was conducted in collaboration with a private company that,for privacy reasons,will be named RC company.The Methodologies procedures used in this descriptive study were the bibliographical research,documentary and content analysis of the main literature.Adopting the most suitable maintenance strategy is one of the main challenges that maintenance managers face.The main purpose of this work is to propose a new approach to evaluate maintenance strategies.In this study,three criteria called reliability,availability and maintainability(ram)have been employed to compare to future maintenance strategies.

关键词： ram Reciprocating compressors Maintenance Oil&gas

Scheme of a WDM Time-Limited ram for OPS

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光学学报 2003年第S1期23卷 675-676页

作者： Shuguang Zhu, Anshi Xu, Hongxi Yin, Deming Wu, Xuzong ChenNational Laboratory on Local Fiber-Optic Communication Network & Advanced Optical Communication Systems, Department of Electronics, Peking University, P.R.China, Tel: 86-10-62755136, Fax: 86-10-62751763 National Laboratory on Local Fiber-Optic Communication Network & Advanced Optical Communication Systems Department of Electronics Peking University P.R.China

We propose a new idea of utilizing Multiple Electromagnetically Induced Transparency Concurrence within a Single Medium to fullfill optical packet buffering and theoretically design a Wavelength Division Multiplexing ... 详细信息

关键词： WDM it Scheme of a WDM Time-Limited ram for OPS of ram for

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嵌入式处理器TLB设计方法研究

计算机学报 2006年第1期29卷 73-80页

作者：范东睿黄海林唐志敏中国科学院计算技术研究所北京100080

以处理器的TLB(Translation Look-aside Buffer)部件为研究对象,探讨嵌入式处理器TLB部件的高能效设计方法.用龙芯1号这款有代表性的真实处理器为设计模型,通过对功耗、面积、关键路径和性能等多方面的试验分析,提出了新颖的TLB低功耗... 详细信息

以处理器的TLB(Translation Look-aside Buffer)部件为研究对象,探讨嵌入式处理器TLB部件的高能效设计方法.用龙芯1号这款有代表性的真实处理器为设计模型,通过对功耗、面积、关键路径和性能等多方面的试验分析,提出了新颖的TLB低功耗设计方法.在经过改进后的TLB设计中,TLB部件的ram部分的面积减少了50%,功耗降低了92.7%,整个TLB部件的面积减少了23.7%,功耗降低了28.5%,而电路延迟几乎没有增加,处理器的性能也没有受到影响.这充分说明改进方案是非常实用而有效的.

关键词： TLB 低功耗龙芯 ram 延迟面积

预处理方法对聚氨酯再生沥青混合料性能的影响

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东南大学学报（自然科学版） 2021年第3期51卷 489-495页

作者：吴建涛伍洋刘泉陆国阳尹龙河海大学土木与交通学院南京210098 香港理工大学建设及环境学院九龙999077 江苏交通控股有限公司南京210019 江苏高速公路工程养护技术有限公司淮安223005

为研究聚氨酯应用于再生沥青混合料(ram)的可行性,研究了聚氨酯再生沥青混合料(PRA)的强度和路用性能.对ram进行抽提沥青、普通热拌、热拌+再生剂预处理后,经聚氨酯常温再生得到试件PRA-1、PRA-2和PRA-3;以大孔隙聚氨酯混合料(PPM)和开... 详细信息

为研究聚氨酯应用于再生沥青混合料(ram)的可行性,研究了聚氨酯再生沥青混合料(PRA)的强度和路用性能.对ram进行抽提沥青、普通热拌、热拌+再生剂预处理后,经聚氨酯常温再生得到试件PRA-1、PRA-2和PRA-3;以大孔隙聚氨酯混合料(PPM)和开级配抗滑磨耗层(OGFC)为对照,测试PRA的劈裂强度、孔隙率、抗冻性、马歇尔稳定度和抗剥落性.结果表明:PRA-1的劈裂强度约1.8 MPa,马歇尔稳定度较大,但抗冻和抗剥落性低于OGFC,性能接近PPM;PRA-2受沥青影响,劈裂强度(约1.0 MPa)和马歇尔稳定度略低,抗冻和抗剥落性优于PRA-1,性能接近OGFC;PRA-3受沥青和再生剂影响,强度和稳定度过低,不具有使用意义.因此聚氨酯应用于ram的可行性与预处理方法密切相关,其中抽提沥青和普通热拌处理方法具有一定应用意义,但不推荐在PRA中掺入再生剂.

关键词：聚氨酯 ram 预处理 PRA 劈裂强度路用性能可行性

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一种改善球形目标ram优化速度的方法

电波科学学报 2002年第5期17卷 450-454页

作者：赵惠玲万伟许家栋万国宾西北工业大学电子工程系陕西西安710072

采用遗传算法设计球形目标雷达吸波材料时 ,由于适应度函数是以级数形式给出 ,且随物体尺寸的增大 ,级数收敛减慢 ,优化时间成倍增长。为提高设计效率 ,依物体电尺寸的大小分段使用不同的方法进行优化设计 ;其次 ,采用浮点数编码 ,可以... 详细信息

采用遗传算法设计球形目标雷达吸波材料时 ,由于适应度函数是以级数形式给出 ,且随物体尺寸的增大 ,级数收敛减慢 ,优化时间成倍增长。为提高设计效率 ,依物体电尺寸的大小分段使用不同的方法进行优化设计 ;其次 ,采用浮点数编码 ,可以节省计算机内存 ,简化优化过程 ,从而大大缩短优化设计的时间。为避免算法陷入局部最优 ,采用分段变参数遗传算法 ,提高进化的效率。最后 ,用Matlab设计算法 ,通过算例证明方法的快捷、有效。

关键词： ram 优化速度球形目标遗传算法雷达吸波材料雷达散射截面

北桥与DUAL PORT ram间接口控制的FPGA设计

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计算机工程 2005年第19期31卷 223-224页

作者：李辉张伟黄俊江南大学信息工程院无锡214036

介绍了一种MIPS体系结构下,北桥在SDram的操作规范下控制dual port ram的新型系统结构设计方案,结合实际实现过程,较清楚地突出了设计的创新点,并介绍了测试结果,结论是该设计完全适用于MIPS系统下的数据交换系统,达到了国外同类产品的... 详细信息

介绍了一种MIPS体系结构下,北桥在SDram的操作规范下控制dual port ram的新型系统结构设计方案,结合实际实现过程,较清楚地突出了设计的创新点,并介绍了测试结果,结论是该设计完全适用于MIPS系统下的数据交换系统,达到了国外同类产品的速度性能要求。

关键词：北桥 Dual port ram FPGA

基于ram的护理干预在肺小结节人群全程管理中的应用价值评价

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中文科技期刊数据库（全文版）医药卫生 2023年第8期 130-133页

作者：杨群六安市人民医院安徽六安237000

探讨基于ram(罗伊适应模式)的护理干预在肺小结节人群全程管理中的应用价值。方法本次研究对象为六安市人民医院体检中心健康体检过程中通过低剂量螺旋CT发现的180例肺小结节患者,采用单纯数字随机分配的方式,分为对照组和观察组,其中... 详细信息

探讨基于ram(罗伊适应模式)的护理干预在肺小结节人群全程管理中的应用价值。方法本次研究对象为六安市人民医院体检中心健康体检过程中通过低剂量螺旋CT发现的180例肺小结节患者,采用单纯数字随机分配的方式,分为对照组和观察组,其中对照组采用全程管理模式,观察组采用全程管理模式联合基于ram的护理干预措施,分析比较两组患者的护理效果。结果通过实验观察,比较两组患者负性心理情绪评分,观察组明显低于对照组(Pram的护理干预措施的应用,可以缓解患者的负性心理情绪,提高患者对于肺结节的认知度、复查依从性及就诊满意度,提高患者肺癌的早期筛查率,具有一定推广价值。

关键词：肺小结节 ram 护理干预全程管理