527 research outputs found
Empirical Study of Rhetoric Appeal Based Writing Model
Abstract Nowadays, there is an increasing awareness of the upset situation concerning English writing among college English teachers. More and more teachers come to expose themselves to various approaches to teaching writing in order to remedy the unsatisfying teaching situation. Process and product approaches are most commonly used in English writing teaching. But with product approach, composing process skills are given relatively small role and to a certain degree students" motivation and interests remain undeveloped, while when applying process approach to teach writing, more and more teachers realize the disadvantages of this socalled "enabling" approach. Based on the study of interrelationship between rhetoric and writing, the purpose of this paper is finding an effective model of writing instruction for students from rhetorical perspective, and through an experiment of composition writing, testing the feasibility of rhetorical model in writing action
Probe: Learning Users' Personalized Projection Bias in Intertemporal Bundle Choices
Intertemporal choices involve making decisions that require weighing the
costs in the present against the benefits in the future. One specific type of
intertemporal choice is the decision between purchasing an individual item or
opting for a bundle that includes that item. Previous research assumes that
individuals have accurate expectations of the factors involved in these
choices. However, in reality, users' perceptions of these factors are often
biased, leading to irrational and suboptimal decision-making. In this work, we
specifically focus on two commonly observed biases: projection bias and the
reference-point effect. To address these biases, we propose a novel
bias-embedded preference model called Probe. The Probe incorporates a weight
function to capture users' projection bias and a value function to account for
the reference-point effect, and introduce prospect theory from behavioral
economics to combine the weight and value functions. This allows us to
determine the probability of users selecting the bundle or a single item. We
provide a thorough theoretical analysis to demonstrate the impact of projection
bias on the design of bundle sales strategies. Through experimental results, we
show that the proposed Probe model outperforms existing methods and contributes
to a better understanding of users' irrational behaviors in bundle purchases.
This investigation can facilitate a deeper comprehension of users'
decision-making mechanisms, enable the provision of personalized services, and
assist users in making more rational and optimal decisions
Pacos: Modeling Users' Interpretable and Context-Dependent Choices in Preference Reversals
Choice problems refer to selecting the best choices from several items, and
learning users' preferences in choice problems is of great significance in
understanding the decision making mechanisms and providing personalized
services. Existing works typically assume that people evaluate items
independently. In practice, however, users' preferences depend on the market in
which items are placed, which is known as context effects; and the order of
users' preferences for two items may even be reversed, which is referred to
preference reversals. In this work, we identify three factors contributing to
context effects: users' adaptive weights, the inter-item comparison, and
display positions. We propose a context-dependent preference model named Pacos
as a unified framework for addressing three factors simultaneously, and
consider two design methods including an additive method with high
interpretability and an ANN-based method with high accuracy. We study the
conditions for preference reversals to occur and provide an theoretical proof
of the effectiveness of Pacos in addressing preference reversals. Experimental
results show that the proposed method has better performance than prior works
in predicting users' choices, and has great interpretability to help understand
the cause of preference reversals.Comment: 29 pages, 12 figure
Crystalline Electric Field Randomness in the Triangular Lattice Spin-Liquid YbMgGaO
We apply moderate-high-energy inelastic neutron scattering (INS) measurements
to investigate Yb crystalline electric field (CEF) levels in the
triangular spin-liquid candidate YbMgGaO. Three CEF excitations from the
ground-state Kramers doublet are centered at the energies = 39,
61, and 97\,meV in agreement with the effective \mbox{spin-1/2} -factors and
experimental heat capacity, but reveal sizable broadening. We argue that this
broadening originates from the site mixing between Mg and Ga
giving rise to a distribution of Yb--O distances and orientations and, thus, of
CEF parameters that account for the peculiar energy profile of the CEF
excitations. The CEF randomness gives rise to a distribution of the effective
spin-1/2 -factors and explains the unprecedented broadening of low-energy
magnetic excitations in the fully polarized ferromagnetic phase of YbMgGaO,
although a distribution of magnetic couplings due to the Mg/Ga disorder may be
important as well.Comment: Accepted in Phys. Rev. Let
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