279 research outputs found

    Design and Implementation of Financial Cashier Management System based on SSH

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    一个企业日常运营所需的资金流入与流出,以及企业的生存、发展、再发展的命脉,都是由出纳掌握并管理着。贵州某企业的出纳工作以往都是采用手工管理的方式,每笔都要用手工一笔一笔登记其日期、金额,而且还要编写摘要,这样不仅工作量大,而且效率非常低。尤其是近几年来,我国信息产业得到迅速发展,在有大量事务需要处理的应用中,如银行帐管理等,使用手工管理方式显然已经不适合了,制定一套适于自己需求的企业出纳管理系统刻不容缓。 贵州某企业出纳管理系统针对企业自身的现状进行需求分析,采用UML建模工具对需求分析进行建模;根据需求进行了系统的设计并进行系统的开发,对于实现了的系统功能进行测试。本系统主要分为五个功能模...The cash’s inflows and outflows of daily enterprise fund and the lifeblood of enterprise survival and development are held by the cashier. Cashier work in an enterprises in Guizhou is managed by manual work. Not only the date and cash amount of expenditure but also the abstract is registered by cashier. It leads to heavy work and low efficiency. With the rapid development of information industry, ...学位:工程硕士院系专业:软件学院_工程硕士(软件工程)学号:X201323010

    An ID-based Anonymous Signcryption Scheme With Self-verifiability For General Access Structure

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    基于身份的环签密结合了环签名和基于身份的签密这两种密码体制的优点,实现了以既保密又匿名认证的方式传输信息,但在传统的基于身份的环签密方案中,通常只考虑用户群是由多个单一用户组成的情况,而未考虑群中的用户是由成员个数不同的“小群体”构成的情况。 据此本文利用双线性对构造了一个在访问结构上的基于身份的匿名签密方案,并在随机预言模型中给出了安全性的证明。同时该方案具有消息的保密性、不可伪造性、签密者身份的模糊性、公开可验证性、可自证性。 本文的结构安排如下: 第一章介绍论文的研究背景以及论文的主要工作。 第二章介绍了与本文所提方案相关的基础知识和基础理论。 第三章介绍了在访问结构上的基于身...ID-based ring signcryption takes advantage of ring signature and ID-based signcryption to realize anonymous authentication and encryption. But in traditional ID-based ring signcryption schemes, the group of signature has just some singular users, without considering the "users" in group can be groups of different sizes. This paper presents an ID-based anonymous signcryption scheme to solve this...学位:理学硕士院系专业:数学科学学院数学与应用数学系_基础数学学号:1912008115271

    红色经典影像与媒介环境变迁——以《红色娘子军》改编为例

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    本文以《红色娘子军》在不同的媒介时代的改编现象作为个案,探讨在新中国电子媒介时期,从电影到电视演进中的媒介影像文本的改编与媒介变迁的关系。借以阐明不同的媒介环境影响下,红色经典影像再现(rEPrESEnTATIOn)所建构的独特景观是影像与媒介环境双向互动的过程。在讨论影像与媒介变迁的关系中,我们认为,在媒介演进的不同的历史时期,对于经典文本的改编、话语权的执行反映出某个团体或历史个体的主观意向,这样在与媒介互动形成历史的过程中,又会被外在化为客观的非真实文化产物。此时客观的非真实(历史文化的建构)又作用于当下的媒介环境自身

    Effects of RNA Helicase DHX32 on Cell Proliferation, Migration and Invasion in Human Colorectal Cancer Cell Lines

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    RNA螺旋酶在RNA加工过程中发挥重要作用,能够利用水解NTP产生的能量参与前mRNA剪接、mRNA转运、翻译起始、RNA降解、核蛋白体生成以及细胞核和线粒体内RNA转录后加工等生物学过程。根据RNA螺旋酶结构域基序氨基酸残基序列的不同,RNA螺旋酶分为DDX和DHX两个家族。已有研究表明多种RNA螺旋酶在肿瘤中表达失调,部分RNA螺旋酶参与细胞分化、细胞周期、细胞凋亡、癌基因表达和肿瘤耐药基因表达的调控。DHX32是一种新的RNA螺旋酶,属于DHX家族,在急性淋巴细胞白血病中低表达。先前我们的研究首次报道了DHX32基因在结直肠癌组织中高表达,并且与结直肠癌的发生部位、组织学分级、癌栓形成、...RNA helicases are important enzymes involved in all aspects of RNA metabolism, which could utilize the energy derived from NTP to participate in RNA processing, including pre-mRNA splicing, RNA transport, translation initiation, RNA degradation, ribosome generation and post-transcriptional processing in cell nucleus and mitochondria. Based on the sequence differences at the motifs of the helicase ...学位:理学硕士院系专业:医学院_微生物学学号:2452011115335

    校内网的SNS人际传播特征分析

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    校内网是典型的SnS校园网站,其传播主体是个体间的人际传播。本文通过对校内网的人际传播主体、符号、内容、传播情景以及传播中时间因素的分析,旨在说明SnS下的人际传播并非是虚幻的、不真实的,并非只是对面对面人际传播所带来的种种社会线索的一味的消除。SnS人际传播局部社会线索的消失有可能反而会激发人们对其他社会线索的探求,同时SnS有可能带来面对面人际传播所不具备的社会线索。本文同时对基于SnS校内网所特有的传播特征进行了进一步的探讨

    Global climate change and mangrove

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    通讯作者:郑文教[中文文摘]因为红树林位于海洋与陆地之间,其可能是首先被全球气候变化影响的生态系统。红树林的分布会随着温度气温的升高而增加。全球气候变化对红树林最重要的影响是海平面的变化。随着CO2的增多,大部分的红树林有高的光合作用率、水的利用效率以及生长率。在相对低的光照条件下,红树林的光合作用率相对较高。最后提出了今后尚待加强的一些研究领域。[英文文摘]Mangrove locates at the interface between land and sea, and is likely to be one of the first ecosystems to be affected by global climate change. Its distribution area would be enlarged with raising temperature. The most important effects of global climate change on it would be t he r ising sea levels. Most mangrov es w ill benefit from increased CO2 via hig her photosynthetic rate, water use efficiency , and growt h rate. At relatively low light level, the photosynthetic rate of mangroves tends to increase. The strategies to deal with these changes were put forward.国家自然科学基金资助项目(39370147

    Attention characteristics of children with different clinical subtypes of attention deficit hyperactivity disorder

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    目的探讨注意缺陷多动障碍(AdHd)儿童不同亚型的注意力特征,为临床干预提供依据。方法对345例AdHd儿童进行分型,使用整合视听持续性操作测试(IVA-CPT)进行注意力评估,比较不同亚型的视觉和听觉注意力特征。以122例正常儿童作为对照。结果 3种亚型AdHd儿童综合注意力商数和综合控制力商数得分均明显低于正常儿童,差异有统计学意义(P<0.01);在控制力商数上,多动/冲动为主型(AdHd-HI)儿童听觉得分低于视觉,差异有统计学意义(P<0.05);在注意力商数、速度商数上,3亚型AdHd儿童听觉得分高于视觉,差异均有统计学意义(P<0.01);在谨慎商数上,视觉得分高于听觉得分,差异有统计学意义(P<0.01);不同亚型AdHd儿童之间听觉注意力相关商数和视觉注意力相关商数差别无统计学意义。结论 AdHd儿童注意功能低于正常儿童,且视觉注意功能受损重于听觉;不同亚型AdHd儿童在视觉和听觉注意力特征上的功能受损程度无差别。Objective To explore the attention characteristics of children with different clinical subtypes of attention deficit hyperactivity disorder(ADHD) and to provide a basis for clinical intervention.Methods A total of 345 children diagnosed with ADHD were selected and the subtypes were identified.Attention assessment was performed by the intermediate visual and auditory continuous performance test at diagnosis, and the visual and auditory attention characteristics were compared between children with different subtypes.A total of 122 normal children were recruited in the control group and their attention characteristics were compared with those of children with ADHD.Results The scores of full scale attention quotient(AQ) and full scale response control quotient(RCQ) of children with all three subtypes of ADHD were significantly lower than those of normal children(P<0.01).The score of auditory RCQ was significantly lower than that of visual RCQ in children with ADHD-hyperactive/impulsive subtype(P<0.05).The scores of auditory AQ and speed quotient(SQ) were significantly higher than those of visual AQ and SQ in three subtypes of ADHD children(P<0.01), while the score of visual precaution quotient(PQ) was significantly higher than that of auditory PQ(P<0.01).No significant differences in auditory or visual AQ were observed between the three subtypes of ADHD.Conclusions The attention function of children with ADHD is worse than that of normal children, and the impairment of visual attention function is severer than that of auditory attention function.The degree of functional impairment of visual or auditory attention shows no significant differences between three subtypes of ADHD

    Study on extraction technology of volatile oil from cortex phellodendri by supercritical carbon dioxide

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    使用超临界二氧化碳技术对经过超声-微波处理过的黄柏中的挥发油进行萃取,并对萃取工艺进行响应面优化。在单因素预实验的基础上,以萃取压力、萃取温度、萃取时间为响应因素,黄柏挥发油的萃取量为响应值,根据中心组合(bOX-bEHnkEn)实验设计原理,采用三因素三水平的响应面分析法,确定各工艺条件对萃取量的影响,并用扫描电子显微镜(SEM)对萃取前、未超声-微波处理超临界萃取后及超声-微波处理超临界萃取后的黄柏进行比较观察,对萃取效果进行了微观解释。结果表明,经过超声-微波处理过的黄柏中的挥发油超临界二氧化碳萃取最佳工艺条件为:萃取压力为34MPA,萃取温度为41℃,萃取时间为66MIn,萃取率达6.03%。The supercritical carbon dioxide extraction of volatile oil from processed cortex phellodendri was optimized by response surface methodology(RSM).According to the principle of Box-Behnken central composite design,extraction pressure,extraction temperature,extraction time were chosen as response factors,extraction mass was chosen as response value,and a three-factor and three level central composite design was adopted to determine the influence of various technological conditions.Using SEM observed the cortex phellodendri before and after extraction,and explained the extraction effects from microcosmic aspect.The results showed that the optimum extraction conditions were as follows:extraction pressure 34MPa,extraction temperature 41℃,extraction time 66min,extraction yield was 6.03%.湖南省科技厅重大专项(2008FJ1007);2010年吉首大学大学生研究性学习与创新性实验计划项目(JSU-CX-2010-49

    阻断交感神经对青年和老龄小鼠小肠T淋巴细胞活性的影响

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    目的探究交感神经在青年和老龄小鼠中对小肠T淋巴细胞的免疫调控机制。方法选用健康的3月龄和18月龄的雄性昆明小鼠,腹腔注射六羟多巴胺,通过石蜡切片和HE染色观察上皮内淋巴细胞的数量,MTT法测定小肠T淋巴细胞的增殖,ELISA试剂盒测定小肠T淋巴细胞分泌IL-2、IL-4水平。结果阻断交感神经后,2个年龄组上皮内淋巴细胞数量均减少,老龄组尤为突出。青年小鼠T淋巴细胞增殖在处理后第5、10天出现下降,老龄小鼠在第3天至第15天均显著下降,其中第5天下降39.4%(P<0.01)。青年小鼠损毁交感神经后主要引起淋巴细胞分泌IL-4含量降低,而老龄小鼠主要引起IL-2降低。结论损毁交感神经可导致青年和老龄小鼠小肠T淋巴细胞活性下降,老龄组下降幅度大,恢复周期长
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