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彭振璇 《环球市场信息导报》2017,(10):103-104
大众传媒是指在信息传播过程中处于职业传播者及大众之间的传播媒介,主要包括复制、传递信息的机械及传播组织、团体及出版物和影视节目及广播节目等.大众传媒传播信息具有影响大、范围广及速度快等优势及特征,具有宣传功效、新闻传播功效、舆论监督功效、文化积累功效及实用功效等功能.大众传播媒介主要分为电子类及印刷类.随着网络及媒体的不断兴起及发展进步,大众传媒在人们生活中应用的力度越来越大,范围越来越广,次数越来越多,其对人们的生活及工作带来了有效的促进作用,为人们精神上提供了较为丰富的扩展空间,图书作为大众传媒的媒介之一有着举足轻重的作用. 相似文献
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韩东 《俄罗斯中亚东欧市场》2005,(7):35-36
俄罗斯联邦兽医及植物卫生监督局成立于2004年,是对俄罗斯联邦农业部狩猎资源保护及发展司、兽医司、作物栽培司、畜牧及育种司、植物保护及农业化学管理局等机构进行合并改组后成立的国家权力执行机关。对俄罗斯联邦兽医、植物检疫与保护、育种以及对被列为狩猎对象的动物对象及水生生物资源对象的保护、 相似文献
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火灾报警控制器的定期检查及功能测试的阶段一般划分为日常巡查、每月检查及功能测试、季度检查及功能测试、年度全面检查及功能测试,其中日常巡查以目测检查为主,其频率最密,是发现一般问题的重要手段,月度、季度及年度检查及功能测试是在目测检查的基础上增加了功能测试的技术手段.本文着重对火灾报警控制器的定期检查及测试方法提出一些见解. 相似文献
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中华人民共和国商务部欧洲司 《俄罗斯中亚东欧市场》2004,(3):44-49
目前.我国对俄出口金额超过1000万美元的主要商品有:谷物及谷物类、蔬菜、干鲜水果、食用油籽、烤烟、粘土及其他耐火矿物、纺织纱线、织物及其制品、自动数据处理设备及其部件、录音机及收录(放)音组合机、旅行用品及箱包、服装及衣着附件(包括织物制袜子)、鞋类、塑料制品、玩具、机电产品、高新技术产品、计算 相似文献
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今年计算机世界展的主题为“中国信息产业全面解决方案”,围绕这一主题,展出内容包括:工作站/服务器、安全认证、全面解决方案、数据库管理、金融系统、生产/设计系统、开发工具及语言、软件开发、个人电脑、文档管理多媒体、台式出版及印刷、便携式及笔记本电脑、办公自动化系统、外设及打印耗材、微型芯片和OEM零件、网络及互 相似文献
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钟敏 《扬州大学商学院学报》2005,9(6):58-62
修辞的原则是修辞界讨论较多的内容,但把修辞的原则分解为潜性原则和显性原则采讨论,尚不多见。修辞应该有潜性原则和显性原则之分。修辞的潜性原则是诚信,它是内在的,看不见,摸不着的;修辞的显性原则是得体,它是外在的,听得见,感受得到的。诚信是表达的出发点和落脚点。得体是诚信的结果和表现形式。诚信必须通过得体这个美丽的外衣来显现。但诚信和得体之问是非对称关系,因此,不可逆向推断。 相似文献
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预应力混凝土管桩作为一种成熟的桩基础形式已越来越被大家所接受,其以施工速度快、长度易调整、质量较可靠、造价较合理、易于检测、现场清洁等优点,被广泛地应用于工业与民用建筑中。本文结合实际工程,探讨预应力混凝土管桩在不良地质条件下的设计与施工。 相似文献
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网络级抗干扰是一个新问题,它与网络的拓扑结构紧密相关。本文研究了无线网中干扰相关性,计算了理想拓扑的干扰独立路径数目的数目。网络抗干扰性能的另外一个问题是评估方法,本文提出了基于平面几何的评估方法,其中包含了距离和方位两个参数。该评估方法计算简单,物理意义明确,能很好地反应无线网的拓扑抗干扰性能。 相似文献
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在设计FIR滤波器时,往往会指定过渡带大小,但过渡带的引入只是为了便于滤波器的设计,而并不是物理上的需要,所以在设计中仅需指定截至频率。这是第一个设计理念。此外,在FIR滤波器的设计中存在两种准则:一是等波纹设计准则 (即最大误差最小化或者Chebyshev准则 ),另一种是平方误差最小准则。但在现实中两种准则往往要同时兼顾,所以仅基于其中一种准则来设计不能得到最佳结果。这是第二个设计理念。基于上述两种设计理念,提出了一种新的FIR滤波器设计算法。该算法采用最陡梯度下降法来对平方误差最小化下的最佳滤波器系数进行迭代修正,得到最佳结果。 相似文献
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现有的有关股票市场发展对货币需求影响的研究,暗含着一个假设:货币流通速度不变。在一个投机性极强的股市里,这一假设难以成立。对Friedman的替代效应修正后,股市发展对货币需求影响与我国实际情况相吻合。股市发展对M1有正向作用,对M2有负向作用,后者的主要成因是我国股市具有极强投机性。 相似文献
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Tomasz R. Bielecki Hanqing Jin Stanley R. Pliska Xun Yu Zhou 《Mathematical Finance》2005,15(2):213-244
A continuous-time mean-variance portfolio selection problem is studied where all the market coefficients are random and the wealth process under any admissible trading strategy is not allowed to be below zero at any time. The trading strategy under consideration is defined in terms of the dollar amounts, rather than the proportions of wealth, allocated in individual stocks. The problem is completely solved using a decomposition approach. Specifically, a (constrained) variance minimizing problem is formulated and its feasibility is characterized. Then, after a system of equations for two Lagrange multipliers is solved, variance minimizing portfolios are derived as the replicating portfolios of some contingent claims, and the variance minimizing frontier is obtained. Finally, the efficient frontier is identified as an appropriate portion of the variance minimizing frontier after the monotonicity of the minimum variance on the expected terminal wealth over this portion is proved and all the efficient portfolios are found. In the special case where the market coefficients are deterministic, efficient portfolios are explicitly expressed as feedback of the current wealth, and the efficient frontier is represented by parameterized equations. Our results indicate that the efficient policy for a mean-variance investor is simply to purchase a European put option that is chosen, according to his or her risk preferences, from a particular class of options. 相似文献
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Joshua Aizenman Reuven Glick 《The journal of international trade & economic development》2013,22(2):129-155
In this study we test whether catching up, the hypothesis that there is technological spillover from leaders to followers, is still important among industrialized countries. Since the USA is no longer the technological leader in many industries and since catching up, if it still exists, may not operate uniformly across different industries, a disaggregated study is more appropriate. A testable model is developed and a number of tests for the existence of catching up are performed. A major improvement on previous tests is that the level of technology is measured in terms of total factor productivity. The two major conclusions, which are quite robust, are that after 1970 there is no catching-up effect left in the tradables sector, while catching up is found for industries in the nontradables sector. 相似文献
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Lars Lindblom 《Journal of Business Ethics》2007,76(4):413-426
The ethical debate on whistleblowing concerns centrally the conflict between the right to political free speech and the duty
of loyalty to the organization where one works. This is the moral dilemma of whistleblowing. Political free speech is justified
because it is a central part of liberal democracy, whereas loyalty can be motivated as a way of showing consideration for
one’s associates. The political philosophy of John Rawls is applied to this dilemma, and it is shown that the requirement
of loyalty, in the sense that is needed to create the moral dilemma of whistleblowing, is inconsistent with that theory. In
this sense, there is no moral dilemma of whistleblowing. This position has been labelled extreme in that it says that whistleblowing
is always morally permitted. In a discussion and rejection of Richard De George’s criteria on permissible whistleblowing,
it is pointed out that the mere rejection of loyalty will not lead to an extreme position; harms can still be taken into account.
Furthermore, it is argued that the best way is, in this as in most other political circumstances, to weigh harms is provided
by the free speech argument from democracy.
Lars Lindblom is a Ph D. student in philosophy at the Royal Institute of Technology, Stockholm, Sweden. He has worked as a
business ethics consultant and has written on efficency, workplace inspections and business ethics. 相似文献