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文中采用Khandelwal提出的Nested-Logit模型测度2001—2015年中国等15个主要林产品贸易强国的出口林产品质量指数，随后采用面板数据模型分析影响出口林产品质量的主要因素。结果显示：发展中国家出口林产品质量发展态势相对一致，总体呈现为稳步增长；发达国家出口林产品质量发展趋势分化明显，存在缓慢增长、小幅波动、缓慢下降等几种态势；国家间出口林产品质量影响因素存在较大差异，发展中国家...
基于Nested Logit模型的共享单车选择行为研究
城市交通 共享单车 共享单车选择行为 Nested Logit
2018/11/16
近两年来，共享单车迅速发展，已有研究较少从微观角度来阐释共享单车的选择行为.本文基于随机效用理论，构建Nested Logit模型，选取出行目的、接驳时间、在车时间、停车时间、费用等出行特征变量，选取下雨(雪)、空气质量、气温、风力等级等天气状况变量，选取年龄、性别、收入等社会经济变量作为效用函数的特征变量，采用D-optimal法设计问卷，在济南市开展共享单车实证调查.基于收集到的样本进行参数标...
Onion-AE: Foundations of Nested Encryption
Anonymity authenticated encryption onion routing
2018/2/6
Nested symmetric encryption is a well-known technique for low-latency communication privacy. But just what problem does this technique aim to solve? In answer, we provide a provable-security treatment...
SEARCHING REMOTELY SENSED IMAGES FOR MEANINGFUL NESTED GESTALTEN
Perceptual grouping Symmetry Urban structure recognition
2016/7/28
Even non-expert human observers sometimes still outperform automatic extraction of man-made objects from remotely sensed data. We conjecture that some of this remarkable capability can be explained by...
THE NEED OF NESTED GRIDS FOR AERIAL AND SATELLITE IMAGES AND DIGITAL ELEVATION MODELS
Orthoimages DEM Geographic Grid
2016/7/8
Usual workflows for production, archiving, dissemination and use of Earth observation images (both aerial and from remote sensing satellites) pose big interoperability problems, as for example: non-al...
Asymmetric Nested Lattice Samples
Computer experiment Design of experiments Asymmetric orthogonal ar- ray Orthogonal array based Latin hypercube Sequential design
2016/1/19
We propose an approach for constructing asymmetric nested lattice samples by randomizing asymmetric nested orthogonal arrays. Such designs possess a desirable nested structure and have attractive spac...
Extended Nested Dual System Groups, Revisited
Identity based encryptions Dual system groups Tight security
2015/12/23
The notion of extended nested dual system groups (ENDSG) was recently proposed by Hofheinz et al. [PKC
2015] for constructing almost-tight identity based encryptions (IBE) in the multi-instance, mult...
This paper discusses the behavior of certain wh-island-violating (but felicitous)
constructions in Hebrew. These constructions exhibit two characteristics that are of
interest: superiority eff...
Unintended consequences from nested state and federal regulations:The case of the Pavley greenhouse-gas-per-mile limits
Nested regulation Emissions leakage Greenhouse gas limits Climate policy CAFE standard Fuel economy Simulation model
2015/7/17
This paper reveals significant unintended consequences from recent 14-state efforts to reduce greenhouse gas emissions through limits on greenhouse gases per mile from new cars. We show that while suc...
A fast nested dissection solver for Cartesian 3D elliptic problems using hierarchical matrices
Elliptic equations Fast algorithms Nested dissection Hierarchical matrices Sparse matrix
2015/7/14
We present a fast algorithm for solutions to linear systems arising from three dimensional elliptic problems on a regular Cartesian mesh. We follow the approach of Schmitz and Ying (2012) on combining...
Implicatures and Nested Beliefs in Approximate Decentralized-POMDPs
Implicatures Nested Beliefs Approximate Decentralized-POMDPs
2015/6/15
Conversational implicatures involve reasoning about multiply nested belief structures. This complexity poses significant challenges for computational models of conversation and cognition. We show that...
Many named entities contain other named entities inside them. Despite this fact, the field of named entity recognition has almost entirely ignored nested named entity recognition, but due to technolog...
Implicatures and Nested Beliefs in Approximate Decentralized-POMDPs
Implicatures Nested Beliefs Approximate Decentralized-POMDPs
2015/6/10
Conversational implicatures involve reasoning about multiply nested belief structures. This complexity poses significant challenges for computational models of conversation and cognition. We show that...
This article describes a new photogrammetric 3-D measurement system for flat objects like plywood boards. 3-D measurement is
needed to get true dimensions of the object along its possibly curved sur...
Joint action in a cooperative precision task: nested processes of intrapersonal and interpersonal coordination
Interpersonal coordination Joint action Postural control
2015/4/10
The authors determined the effects of changes
in task demands on interpersonal and intrapersonal coordination. Participants performed a joint task in which one
participant held a stick to which a ci...