94 research outputs found

    Research and Design of Fujian Electric Power Communication Back bone Optical Transmission NetworkExpansion

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    福建电力通信传输网络主要采用光纤通信技术,其他传统通信模式为补充的运行方式,初步建成以光纤通信为主,辅以微波通信、电力线载波通信、卫星通信的电力通信传输网,业务范围也不仅仅是过去的电力调控运行,已发展到目前贯穿电力生产、调度、基建、营销、联合办公等,涵盖电力公司的生产与经营的全部过程,传送着与电力生产与运营以及企业管理相关的语音、数据和图像业务。然而随着电网建设的飞速发展以及国网公司智能电网建设的开展,电力生产与企 业管理的数据业务暴增,福建电力主干通信传输网现有骨干网络将难以满足日益 增长的电力生产管理信息传输的需要,因此需要进行带宽扩建,才能匹配和服务 于未来的智能化电网发展。 本...Fujian electric power communication transmission network mainly uses optical fiber communication technology and other modes of communication as a supplement. It initially builds by optical fiber primarily and it is aided by microwave communication, power line carrier communication and the channel of satellite communications. The scope of business is not only used to control the operation of el...学位:工程硕士院系专业:信息科学与技术学院_工程硕士(电子与通信工程)学号:X200822200

    同乐太阳能企业的现在问题与发展对策

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    本文深入剖析了一家民营高科技企业。对其所处的行业及其在行业中的地位进行分析,发现它现存的问题,提出未来的发展战略。并对企业的财务管理、人事管理、市场营销管理进行了具体分析,提出了具体的解决办法。全文共分六部分: 第一章介绍企业概况、以及企业所处行业在国内国外的发展状况。本文介绍的企业——云南省玉溪同乐太阳能设备厂(在文中简称为“同乐太阳能企业”或“同乐”)是云南省玉溪市第一民营企业,是云南省高新技术企业,企业的新产品列入国家火炬计划。创业者目前拥有企业百分之百的股份,这是一家典型的民营高科技企业。该企业所处的行业——太阳能利用行业是一个朝阳行业,世界上很多国家都非常重视开发利用太阳能。太阳能...学位:工商管理硕士院系专业:管理学院工商管理教育中心_工商管理硕士(MBA)学号:19981505

    Study on the Damage Compensation System of Food Safety

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    食品,与空气、水一样,是人类赖以生存和发展的基础,食品安全是人类最基本权利的保障。随着国家经济的发展以及人民生活水平的提高,国民越来越关注食品的安全与品质问题,而近年来发生的一系列食品安全事件却一再刺痛人们原本脆弱的神经。虽然《食品安全法》已经施行了四年,却收效甚微。执法部门和广大人民群众一致认为其违法成本太低,因此笔者试图从食品安全损害赔偿制度角度出发,深入剖析食品安全问题频发的原因,完善制度设计以筑牢“民之天”的长城。本文共分为四个部分: 第一章是食品安全损害赔偿相关概念的界定。先对食品安全进行法律概念的厘清,并分析其现状。然后对食品安全损害赔偿的内涵进行介绍。 第二章是阐述我国食品安...Food, like air and water, is the basis for human survival and development, and food safety is the most basic human rights protection. With the development of the national economy and the improvement of people's living level, people pay more and more attention to the issue of food safety and quality, but a series of food safety incidents which occurred in recent years has been repeatedly stabbing p...学位:法律硕士院系专业:法学院法律系_法律硕士(JM)学号:X201012004

    Lower and Upper Orientable Strong Radius and Diameter of Cartesian Product of Paths

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    强有向图d中任意两个点u,V的强距离Sd(u,V)定义为d中包含u和V的最小有向强子图duV的大小(弧的数目).d中一点u的强离心率SE(u)定义为u到其他顶点的强距离的最大值.强有向图d的强半径SrAd(d)(相应的强直径SdIAM(d))定义为d中所有顶点强离心率的最小值(相应的最大值).无向图g的最小定向强半径SrAd(g)(相应的最大定向强半径SrAd(g))定义为d中所有强定向的强半径的最小值(相应的最大值).无向图g的最小定向强直径SdIAM(g)(相应的最大定向强直径SdIAM(g))定义为d中所有强定向的强直径的最小值(相应的最大值).本文确定了路和路的笛卡尔积的最小定向强半径SrAd(PMxPn)和强直径的值SdIAM(PMxPn),给出了最大定向强半径SrAd(PMxPn)的界并提出关于最大定向强直径SdIAM(PMxPn)的一个猜想.For two vertices u and v in a strong digraph D,the strong distance sd(u,v)between u and v is the minimum size(the number of arcs)of a strong sub-digraph of D containing u and v.For a vertex v of D, the strong eccentricity se(v)is the strong distance between v and a vertex farthest from v.The strong radius srad(D)(resp.strong diameter sdiam(D))is the minimum(resp.maximum)strong eccentricity among the vertices of D.The lower(resp.upper)orientable strong radius srad(G)(resp.SRAD(G))of a graph G is the minimum(resp.maximum)strong radius over all strong orientations of G.The lower(resp.upper) orientable strong diameter sdiam(G)(resp.SDIAM(G))of a graph G is the minimum(resp.maximum) strong diameter over all strong orientations of G.In this paper,we determine the lower orientable strong radius and strong diameter of Cartesian product of paths,and give bounds on the upper orientable strong radius and a conjecture of the upper orientable strong diameter of Cartesian product of paths

    非洲经济发展模式及其转型——结构经济学视角的分析

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    近20年,撒哈拉以南非洲地区实现了经济快速增长,非洲商界和政界对未来发展普遍持乐观态度。但是经济的快速增长主要是基于援助、减债、国际市场商品价格上涨等外部因素和消除弊政等内部因素共同作用的结果,非洲自身生产能力的提升有限,单一经济结构仍是其经济发展面临的最大问题。撒哈拉以南非洲国家若不积极推进经济转型,促进经济包容性增长,不仅无法实现经济快速、可持续发展,亦将会为社会动荡和政治不稳埋下隐患。本文在总结非洲发展现状和发展模式特征的基础上,提出非洲经济发展道路上存在的亟需解决的几大重要问题,同时,以新结构经济学为指导,对解决非洲结构调整和经济转型,促进其经济持续健康发展提出政策建议

    以金融发展、金融创新助力“一带一路”战略的实施

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    现有研究表明,金融发展程度与一国对外投资水平息息相关。"一带一路"战略引发我国对外直接热潮的同时,也对我国金融发展和创新力度提出了要求。本文从"一带一路"战略实施对金融服务的需求出发,分析我国现有金融体系的不足,最后从金融市场、机构和产品三个层面,提出推动金融创新、促进金融发展,以保障"一带一路"战略的落实

    Clinical Observation of Different Regimens for Treatment Early Onset Preeclampsia

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    目的比较不同方案治疗早发型子痫前期的疗效和安全性。方法选取2013年5月至2016年10月在我院妇产科诊治的早发型子痫前期孕妇200例,根据随机数字表法分成4组,每组各50例:硫酸镁常规治疗组(A组);硫酸镁常规治疗+丹参注射液组(B组);硫酸镁常规治疗+低分子肝素组(C组);硫酸镁常规治疗+丹参注射液+低分子肝素组(D组)。观察各组脐动脉收缩压与舒张压比值(S/D)、平均动脉压、24h蛋白尿、分娩方式、延长孕龄时间、新生儿窒息率、母体并发症和不良反应等指标。结果①各组治疗后平均动脉压均显著降低,差异有统计学意义(均P0.05)。各组治疗后S/D均降低(均P0.05)。②与A组比较,B、C、D组终止妊娠孕周增加(均P0.05)。结论硫酸镁联合低分子肝素和/或丹参治疗早发型子痫前期疗效均优于硫酸镁常规治疗,且安全性不低于硫酸镁常规治疗。ObjectiveTo observe the efficacy and safety of different regimens in treatment early onset preeclampsia.Methods200cases of early onset preeclampsia patients admitted to our hospital were randomly divided into four groups,each group of50cases.group A:magnesium sulfate conventional treatment,group B:magnesium sulfate+salvia miltiorrhiza,group C:magnesium sulfate+low molecular heparin,group D:magnesium sulfate+salvia miltiorrhiza+low molecular heparin.The ratio of systolic and diastolic pressure of fetal umbilical artery(S/D),mean arterial pressure,24h proteinuria,mode of delivery,prolong gestational age,neonatal asphyxia,maternal complications and adverse reactions were compared among the four groups.Results①After treatment,the mean arterial pressure was significantly reduced(P<0.05),but there was no significant difference among groups(all P>0.05).Post treatment S/D decreased significantly(all P<0.05),D group post treatment S/D especially decreased(P<0.05).②Com pared with A group,B,C,D group termination of pregnancy increased gestational weeks(all P<0.05).③B,C,D groups prolonged gestational age and neonatal weight were higher than A group,however the rate of neonatal asphyxia was lower than that of group A(P<0.05).The gestational age of C and D groups were higher than that of group B,and the rate of neonatal asphyxia in group D was lower than that in group B(all P<0.05).④There were no significant difference in the incidence of maternal complications and adverse reactions among four groups(all P>0.05).ConclusionThe efficacy of magnesium sulfate combined with low molecular weight heparin and/or salvia miltiorrhiza in treatment early onset preeclampsia was better than that of magnesium sulfate,and the safety was not lower than that of magnesium sulfate.河南科技攻关项目(152102310086

    Preparation of Immobilized Nucleoside Phosphorylase and Research on Its Property

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    目的优化核苷磷酸化酶的固定化工艺,并对固定化酶的性质进行研究。方法通过正交试验优化核苷磷酸化酶(包括嘌呤和嘧啶核苷磷酸化酶)固定化条件,并进一步对固定化核苷磷酸化酶的最适P H、温度及其稳定性进行研究。结果固定化酶条件为P H=8.0,温度为25℃,蛋白载量为20 Mg/g载体,固定化时间为6 H;固定化核苷磷酸化酶的最适P H=7.5,最适温度为40℃,固酶连续使用20批次酶活力无明显损失。结论固定化核苷磷酸化酶稳定可靠,适合应用于工业化生产。Objective To optimize the immobilization process of the nucleoside phosphorylase and research on its property.Methods The immobilization process of the nucleoside phosphorylase(including purine and pyrimidine nucleoside phosphorylase)was optimized by orthogonal test,and took further study of the finest p H,temperature and stability of immobilized nucleoside phosphorylase.Results The finest condition of immobilized enzyme was p H = 8.0,25 ℃,20 mg/g protein loads and immobilize for 6 h; the finest condition for the immobilized nucleoside phosphorylase to catalyze was p H = 7.5 and 40 ℃.There was no significant loss of activity of the enzyme after use for catalyzing 20 batches consecutively.Conclusion The immobilized nucleoside phosphorylase is stable and reliable,which is suitable to application in industrial productio

    棕色固氮菌细菌铁蛋白释放铁的动力学方程和性质

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    棕色固氮菌细菌铁蛋白铁核中的磷铁组成存在非均匀性。细菌铁蛋白释放铁的动力学特性表现出复杂性。通过动力学曲线分析,提出蛋白壳自身调节能力起着限制释放铁速率关键步骤的观点,建立分析铁蛋白释放铁的动力学特性方程并用它较合理地阐明铁蛋白释放铁的动力学规律及储存铁的途径。用分光光度法和动力学方程研究细菌铁蛋白释放铁的全过程,其结果表明该蛋白以一级反应方式释放铁核表层的铁和以零级反应方式释放铁核内层的铁。外加磷酸盐能强烈地抑制释放铁的速率,引起释放铁的反应级数的转化,迫使铁蛋白以一级反应的方式释放铁核中的大多数铁。国家教委回国留学人员基金;福建省自然科学基

    锁核酸修饰探针熔解曲线分析在Kras基因突变检测中的应用

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    以探针熔解曲线技术为平台,结合锁核酸(LNA)修饰探针建立熔解曲线分析(MCA)体系(MCA-LNA体系),实现一管同时检测Kras基因中7个热点突变,并通过对探针的改良达到富集突变型的效果,使其分析灵敏度得到明显提升,达0.05%~0.5%。利用MCA-LNA体系对72份临床结直肠癌标本进行KRAS突变检测,共检出24份阳性标本,与普通探针熔解曲线技术相比多检出5份突变阳性标本,经扩增阻碍突变系统(ARMS)方法验证为突变型。由上述结果可见MCA-LNA体系能显著提高检测限和阳性标本检出率,更有利于基因筛查和指导靶向治疗。福建省高校杰出青年科研人才培育计
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