A study on maximizing the lifetime of wireless sensor networks

... Based on the network model, we present the structure of a data aggregation tree used for data Chapter On Maximizing the Lifetime for Data Aggregation in WSNs 21 aggregation in WSNs and its lifetime ... energy consumption of backbone nodes (a) Nodes u, v, x, and y use a large-range radio in the backbone (b) Node v uses a small-range radio, and the others use a l...

Ngày tải lên: 20/05/2016, 21:46

... strong diversity of coexistent definitions In this section, we summarize the most common definitions in the form of a survey of lifetime definitions 2.1 Network Lifetime Based on the Number of Alive ... when either the percentage of alive nodes or the size of the largest connected component of the network drop below a specified threshold However, this definition o...

Ngày tải lên: 28/04/2014, 13:38

... P TO A S U S T A IN E D A D V A N T A G E [D'Aveni, Hypercompetition, 1994, p 12] D ’Aveni(1994) is aware that today’s companies are fast at copying each other’s advantages Therefore, the advantage ... market from 2005- 2007 - Analyze the VMS competitiveness - Application New 7S’s Model to VMS case Aim - Give out the applicable and effective competitive strategy...

Ngày tải lên: 09/01/2015, 09:41

... Clarify the view on quality of human resource Analyze the practical situation of quality of human resource in Quang Ninh Customs Department, so as to point out achievements and limitations in the management ... reseachers 16 CHAPTER 111: PRATICAL SITUATION OF HUMAN RESOURCE QUALITY MANAGEMENT IN CUSTOMS DEPARTMENT OF QUANG NINH PROVIN...

Ngày tải lên: 17/03/2015, 12:53

... Finance and banking arc always considered to be the bone of one country ‘s economy The rapid development o f banking in Vietnam has demonstrated that banking is still a "fertile land" It has ... describes the activities the organization performs and links them to the organizations competitive position ' Value chain analysis describes the activities within and around...

Ngày tải lên: 26/03/2015, 08:48

... process control is non- normal, traditional Shewhart variable charts may not be applicable If the performance of the SPC scheme is adversely affected by a violation of the assumptions, modification of ... for non- normal data They showed that, in the non- normal case, a properly designed EWMA control chart will have an in -control ARL that is reasonably clos...

Ngày tải lên: 26/09/2015, 10:34

... respectively, the set of nodes and the set of valid radio links l(x, x ) Under the hypothesis of switched links, l(x, x ) only exists if both are in range one of each other.1 The connectivity is ... outside the disk can help for the connectivity of nodes inside the disk Then, connectivity is assessed through the probability P(con(A)) that the nodes inside a...

Ngày tải lên: 22/06/2014, 19:20

... increase the competitive advantage of the fast food restaurant The basic attribute of a fast food restaurant are also important for a fast food restaurant to excel because the strength of a brand ... qualities, brand loyalty, brand awareness, brand association and other propriety assets According to him, Brand loyalty has to with the level of...

Ngày tải lên: 24/09/2012, 17:19

... iii Abstract In an attempt to investigate Phuong Dong University s second- year students’ oral presentations difficulties in the classroom setting, the research was aimed at finding out: (1) the ... Teaching Oral Presentation Skills 15 v Chapter II: The study 18 2.1 An Overview of the Current Situation of Teaching and Learning Speaking at English Depa...

Ngày tải lên: 07/09/2013, 13:02

... CONCLUSION Summary of the findings: The findings of the whole study of application of group work in the speaking class of the 1st year students can be concluded in the following: a The advantages of ... improve speaking skill of 1st year students at FPT University, the researcher intends to investigate the current situation of us...

Ngày tải lên: 29/01/2014, 10:33

... presenting the introduction; developing the main body of the presentation; reinforcing the ideas outlined in the main body and presenting the conclusion In second language classrooms, oral presentations ... of 62 second- year majors of English at Phuong Dong University In addition to the questionnaire, informal discussions with the informants a...

Ngày tải lên: 29/01/2014, 10:43

... understands awareness and implementation, CSR reporting of CSR in a multinational company operating in Vietnam by asking respondents' understanding and opinion From conducting the research, it is able ... CSR in multinational companies operating in Vietnam With the growing of Vietnam economy, it has attracted many multinational companies to opera...

Ngày tải lên: 13/03/2014, 14:19

... types of costing method such as: traditional or absorption costing method, variable costing method, throughput costing method, and ABC costing method Changes in business environments requires a better ... variable costing method was used as the only and easiest way to calculate the costs This is because it is easy to accountants as well as managers and...

Ngày tải lên: 13/03/2014, 14:19

... electrons are emitted from the graphene tip creating an electron current that can be modulated on and off Fig Fabrication process of graphene sheets using a mechanical exfoliation method The graphene ... vacuum chamber, two tungsten tips were located on the graphene sample; one was contacted directly to the sample and grounded as a cathode, and the other was placed an arbi...

Ngày tải lên: 22/06/2014, 00:20

... post-transcriptional level [20] The aim of this study was to investigate the role of p27 and cyclin E immunoexpression as a prognostic factor in early breast carcinoma Methods A database of all wide local excisions ... there were racial differences in breast carcinoma When disease stage and age at diagnosis were adjusted for, it was shown that...

Ngày tải lên: 09/08/2014, 01:24