排序方式: 共有57条查询结果,搜索用时 453 毫秒
1.
通过对油站和污水站的化学成分分析,找出了电脱水器跳闸的原因:由于污水中的一些成分导致腐蚀,腐蚀产生的硫化铁和铁颗粒,随着油水混合液在管线中运移,在电脱水器上越积越厚,致使电脱水器上导电率增高,电脱水器跳闸。提出了改善注入水水质,减缓腐蚀的有利措施。 相似文献
2.
There is a recognition of 99%of economic enterprises in the Lao People’s Democratic Republic(PDR)is smalland medium-size enterprise(SMEs)and 94%of employment.It... 相似文献
3.
Arne Beck 《Transport Policy》2012,19(1):26-35
German public transport services by bus are characterized by a regulatory framework that distinguishes between commercial and non-commercial services. Contrary to the apparent views of legislators, this paper shows that costs and revenues are not the only parameters determining whether or not operators are able to provide services in a commercially viable way.Apart from the local characteristics of the specific service, we show that the classification of services as commercial versus non-commercial is determined in large part by the public transport authorities that set minimum quality standards to be provided by operators. Our analysis shows that the authorities awarding the contracts in some cases affect market organization significantly depending on how they make use of this power. Furthermore, market organization differs substantially with respect to the awarding structure and the contractual relationships, thus creating a challenge for operators and authorities in an embryonic market. 相似文献
4.
The relationship between Karl Pearson and the Scandinavian statisticians was more of a competitive than a collaborative nature. We describe the leading statisticians and stochasticists of the Scandinavian school, and relate some of their work to the work of Pearson. 相似文献
5.
6.
Summary. Suppose that an economic agent is
100% certain that uncertainty she faces is characterized by a particular probability measure, but that she has a fear that, with
100% chance, her conviction is completely wrong and she is left perfectly ignorant about the true measure in the present as well as in the future. This situation is often called
-contamination of confidence. The purpose of this paper is to provide a simple set of behavioral axioms under which the decision-makers preference is represented by the Choquet expected utility with the
-contamination of confidence.Received: 25 November 2002, Revised: 15 November 2004, JEL Classification Numbers:
D81.
Correspondence to: Hiroyuki OzakiWe are grateful to an anonymous referee. The referees comments greatly improved the exposition of the paper. The work reported here is partially supported by a grant from the Economic and Social Research Insitute, the Cabinet Office, the Government of Japan. 相似文献
7.
Miranda Goode Kelley Main 《Canadian Journal of Administrative Sciences / Revue Canadienne des Sciences de l\u0027Administration》2020,37(1):5-8
This special issue of the Canadian Journal of Administrative Sciences features four articles using various methodologies to explore the interplay of technology and consumption. Through an exploration of identity expression in virtual reality to the consumption of fashion media and culture to inspiring the use of wearables, we learn that although new technologies may change traditional consumption patterns, fundamental human needs persist. From this special issue, it is evident the so-called brave new world will require companies, and marketers especially, to not lose sight of the human when using and experimenting with technologies to streamline and enhance consumption and marketplace experiences. 相似文献
8.
明洪武到弘治年间,州县官府的赋役管理从基本不依赖核算向需要且能够进行核算的状态转变。洪武、永乐时期,在官府体系内部,只有田赋被部分地纳入核算管理,其他赋役征发则完全或绝大部分无法计量,也没有计划性。宣德以降,地方官员吸收民间粮里阶层分担赋役负担的经验,在此基础上进行旨在“均平”的改革,以确保赋役的可持续征发。在探索均平之道的过程中,不同地方官员多采取量化赋役负担、预定征收计划、将派征对象标准化并进行摊派核算的方式。其中,田赋额等开始扮演摊派对象的角色。这开启了州县层面赋役征收核算体系的发展之路,也导致府、州、县与户、工等部及布政使司之间产生了赋役核算信息不对称,出现了二重会计结构。 相似文献
9.
Marcel Riesz 《Scandinavian actuarial journal》2013,2013(1):54-74
Abstract On connaît le rôle que joue le théorème de Parseval. dans la théorie des séries de Fourier et, plus généralement, dans celle des développements suivant des fonctions orthogonales. On sait aussi qu'on peut généraliser la notion d'orthogonalité ainsi que le théorème de Parseval de différentes manierès, p. ex. en se servant de l'intégrale de Stieltjes correspondant à, une distribution de masses positives. 相似文献
10.