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11.
随着互联网进入了大数据和云计算时代,分布式存储技术近年来受到了工业界和学术界的广泛关注。为了解决服务器压力过大、异地快速容灾和用户就近访问等问题,本文从异地多活、分布式CAP理论着手,分析了分布式存储的特性、应用场景和技术挑战,进而利用开源的Redis NoSql数据库,RabbitMQ消息队列等技术,搭建了一个满足最终一致性,可用性和分区容忍性的“异地多活”分布式存储系统。通过对系统的压力测试结果表明,基本可以满足工业级应用的吞吐量和一致性的要求。 相似文献
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Within research on psychoanalysis, the common model of analytic change conceptualizes it as structural reorganization and development of self-analytic function. The present article takes as its point of departure analytic patients who, in follow-up interviews, do not present their experience of change according to this common model. Instead of categorizing analysands as being either successful or unsuccessful cases, the article aims to develop concepts of change that pertain to the experiential domain. Themes in the self experience of three former patients are explored. The data is gathered through follow-up interviews. The interviews were conducted with an analytic approach, which provides data on transference themes. Data from the interviews is not intended to provide empirical support for outcomes, but provides material from which concepts of change can be explored and discussed. The three cases illustrate three distinct psychic dimensions: safety, meaningfulness and sameness. All the cases have in common that they show, as described by Modell (1990), a containing transference in the follow-up interviews. Based on the postulated dimensions of self-experience, and with the view that containing transference is a common theme, it is further argued that, despite showing object-dependency, these informants have undergone an experiential change that is of existential significance. This is a kind of change that, it may be argued, is beyond a structural one; one that may be conceptualized as a precondition for the kind of change assumed by the main analytic model. To develop a self-analytic function, the patient may first need to develop a containing one. (PsycINFO Database Record (c) 2011 APA, all rights reserved) 相似文献
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1988~1992年,作者采用He-Ne激光辐照黑麦花粉与杂交相结合的方法,对小麦属间杂交(普通小麦×黑麦)进行了研究。属间杂交所获种子的结实率极显著高于对照,为113.25~341.60%。籽粒千粒重和饱满度均超过对照,差异极显著。L_1代籽粒出苗率和植株成活率分别比对照提高58.18~83.06%,41.35~87.78%,差异均超过极显著水平。L_1代种子、植株和穗的大多数形态特征呈中间型或似父本,其余特点象母本。在L_1代植株中均获得了染色体自然加倍的双二倍体,即小黑麦种子。现已获得了L_1、L_2、L_3和L_4代的小黑麦后代材料。He-Ne激光诱变小麦属间杂交,使杂种染色体自然加倍,为小麦属间杂交育种工作提供了新的简便途径。 相似文献
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青海广播电视台于2011年10月开始建设高清DSNG新闻采访卫星车,现已完成集成验收工作.高清DSNG新闻采访卫星车系统由卫星传输系统和音视频系统两部分组成,着重从链路计算、设备选型、系统构成、技术指标、系统监控等方面介绍了卫星传输系统. 相似文献
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在确定的函数关系(数学模型)中,因变量(输出量)随自变量(输入量)的变化规律完全由数学逻辑所确定,自变量到因变量的传递系数(灵敏系数)也可由因变量的标准差和自变量的标准差之比所决定,而与自变量的来历(测量的或者给定的)没有关系[1].本文根据这一基本原理,采用模拟自变量随机变化的方法,成功计算了手持式激光测距仪的测距固定偏差和比例偏差系数的测量不确定度,从而计算出测距标准差综合评定的扩展不确定度,同时解决了复杂的数学模型中多个输入量到输出量的灵敏系数和输出量的不确定度的计算问题. 相似文献
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Medication packaging is essential to provide patients with guidance and correct use of their medicines for effective treatment. This research aims to increase knowledge about the medication packaging innovation process and its uptake towards patient‐centered packaging design. The study applied a qualitative research approach based on data from 25 in‐depth interviews with stakeholders involved in medication packaging design. The empirical data analysis revealed four themes that can improve and advance user‐centered packaging design: medication packaging innovation process, medication packaging functions and features, medication packaging design constraints, and patient‐centered medication packaging design. The findings suggest that medication packaging design is strongly affected by an emphasis on protective and safety packaging functions rather than on patients' needs. Packaging innovation usually is constrained by rigid incremental development processes, where compliance with regulations, extensive documentation, avoidance of manufacturing complexity, and considerations on cost prevail. These findings are discussed in relation to the three most evident trade‐offs for patient‐centered design: protection versus openability, utility versus cost, and complexity of manufacturability versus complexity of use. This research contributes with valuable input and additional evidence about the necessary shift to a user‐centered approach in a field that has not been design driven. This input complements previous research and provides an opportunity for industry decision makers and policy makers to lead patient‐centered packaging design that can benefit patients and relieve overloaded health care systems. 相似文献