16,196 research outputs found
The Impact of Online Third-party Product Reviews on Consumer Adoption of a New Product
Research has discovered that the third-party product review (TPPR) can influence consumer adoption of a new product. However, the specific influence mechanism needs further deep explorations. In this study, effects of different types of TPPR on consumer adoption of different new products were tested from the perspective of consumer knowledge. Based on two experimental designs, it is reported that the TPPR in the recommendation format and comparison format influence the intentions of new consumers to use really new products mostly. The TPPR in the description format and independent format influence the intentions of expert consumers to incremental new products. Moreover, the source of TPPR is vital. Consumers trust the TPPR in professional product evaluation websites more compared with public media. In other words, TPPR in professional product evaluation websites can facilitate consumer adoption of new products. The research conclusions here further enrich researches concerning TPPR and adoption of new productions
The Impact of Online Word-of-mouth and Negative Media Exposure on Consumer Habitual Skepticism: The Mediating Effect of Attribution
How did habitual skepticism come into being? In this research,the causes of consumer habitual skepticism are explored from the perspective of attribution. We put forward two important antecedent variables, negative online word-of-mouth and negative media exposure. The study results show that the higher the negative word-of-mouth perception is, the higher the stability and controllability of consumer attribution will be, and the higher the degree of consumer habitual skepticism will be. The higher the intensity of negative media exposure is, the higher the stability and controllability of consumer attribution will be, and the higher the degree of consumer habitual skepticism will be. We test this framework through two experiments. Study 1 investigates the influence of negative word-of-mouth spread and media exposure on consumer habitual skepticism. Study 2 investigates the effect of two independent variables on consumer habitual skepticism from an overall point of view and explore the mediation effect of attribution
Neural Document Expansion with User Feedback
This paper presents a neural document expansion approach (NeuDEF) that
enriches document representations for neural ranking models. NeuDEF harvests
expansion terms from queries which lead to clicks on the document and weights
these expansion terms with learned attention. It is plugged into a standard
neural ranker and learned end-to-end. Experiments on a commercial search log
demonstrate that NeuDEF significantly improves the accuracy of state-of-the-art
neural rankers and expansion methods on queries with different frequencies.
Further studies show the contribution of click queries and learned expansion
weights, as well as the influence of document popularity of NeuDEF's
effectiveness.Comment: The 2019 ACM SIGIR International Conference on the Theory of
Information Retrieva
Unsupervised Multi-view Pedestrian Detection
With the prosperity of the video surveillance, multiple cameras have been
applied to accurately locate pedestrians in a specific area. However, previous
methods rely on the human-labeled annotations in every video frame and camera
view, leading to heavier burden than necessary camera calibration and
synchronization. Therefore, we propose in this paper an Unsupervised Multi-view
Pedestrian Detection approach (UMPD) to eliminate the need of annotations to
learn a multi-view pedestrian detector via 2D-3D mapping. 1) Firstly,
Semantic-aware Iterative Segmentation (SIS) is proposed to extract unsupervised
representations of multi-view images, which are converted into 2D pedestrian
masks as pseudo labels, via our proposed iterative PCA and zero-shot semantic
classes from vision-language models. 2) Secondly, we propose Geometry-aware
Volume-based Detector (GVD) to end-to-end encode multi-view 2D images into a 3D
volume to predict voxel-wise density and color via 2D-to-3D geometric
projection, trained by 3D-to-2D rendering losses with SIS pseudo labels. 3)
Thirdly, for better detection results, i.e., the 3D density projected on
Birds-Eye-View from GVD, we propose Vertical-aware BEV Regularization (VBR) to
constraint them to be vertical like the natural pedestrian poses. Extensive
experiments on popular multi-view pedestrian detection benchmarks Wildtrack,
Terrace, and MultiviewX, show that our proposed UMPD approach, as the first
fully-unsupervised method to our best knowledge, performs competitively to the
previous state-of-the-art supervised techniques. Code will be available
Robust Classification with Convolutional Prototype Learning
Convolutional neural networks (CNNs) have been widely used for image
classification. Despite its high accuracies, CNN has been shown to be easily
fooled by some adversarial examples, indicating that CNN is not robust enough
for pattern classification. In this paper, we argue that the lack of robustness
for CNN is caused by the softmax layer, which is a totally discriminative model
and based on the assumption of closed world (i.e., with a fixed number of
categories). To improve the robustness, we propose a novel learning framework
called convolutional prototype learning (CPL). The advantage of using
prototypes is that it can well handle the open world recognition problem and
therefore improve the robustness. Under the framework of CPL, we design
multiple classification criteria to train the network. Moreover, a prototype
loss (PL) is proposed as a regularization to improve the intra-class
compactness of the feature representation, which can be viewed as a generative
model based on the Gaussian assumption of different classes. Experiments on
several datasets demonstrate that CPL can achieve comparable or even better
results than traditional CNN, and from the robustness perspective, CPL shows
great advantages for both the rejection and incremental category learning
tasks
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