Image-Based Localization Using Deep Neural Networks

Image-based localization, or camera relocalization, is a fundamental problem in computer vision and robotics, and it refers to estimating camera pose from an image. It is a key component of many computer vision applications such as navigating autonomous vehicles and mobile robotics, simultaneous localization and mapping (SLAM), and augmented reality. Currently, there are plenty of image-based localization methods proposed in the literature. Most state-of-the-art approaches are based on hand-crafted local features, such as SIFT, ORB, or SURF, and efficient 2D-to-3D matching using a 3D model. However, the limitations of the hand-crafted feature detector and descriptor become the bottleneck of these approaches. Recently, some promising deep neural network based localization approaches have been proposed. These approaches directly formulate 6 DoF pose estimation as a regression problem or use neural networks for generating 2D-3D correspondences, and thus no feature extraction or feature matching processes are required. In this thesis, we first review two state-of-the-art approaches for image-based localization. The first approach is conventional hand-crafted local feature based (Active Search) and the second one is novel deep neural network based (DSAC). Building on the idea of DSAC, we then examine the use of conventional RANSAC and introduce a novel full-frame Coordinate CNN. We evaluate these methods on the 7-Scenes dataset of Microsoft Research, and extensive comparisons are made. The results show that our modifications to the original DSAC pipeline lead to better performance than the two state-of-the-art approaches

A Study of the Relationship Between Teachers’ Perceptions Towards Reward System and Their Organization Commitment in Shanxi Experimental Secondary School

Abstract: The main purpose of this study was to determine the relationship between teachers’ perceptions towards the reward system and their organization commitment in Shanxi experimental secondary school. The study firstly assessed the teachers’ perceptions towards reward system, examined their organization commitment, lastly found the relationship between reward system and organization commitment. The study was conducted to survey of 100 full time teachers from academic year 2019 at Shanxi experimental secondary school. Means and Standard Deviations were used to report the level of teachers' perceptions towards reward system and their organization commitment; to analysis the relationship between these two variables, Pearson Product Moment Correlation Coefficient was applied to test in this paper, the r =.701, Sig.(2-tailed) was .000. The results showed that, the teachers in the target school had a relatively positive attitude towards reward system. The Pearson Correlation test indicated that there was a significant relationship between teachers’ perceptions towards reward system and their organization commitment in Shanxi experimental secondary school, China.

The Development of a Model to Enhance Teacher Leadership in Middle Schools in Shanxi Province, China

Teacher leadership is the heart of the transformation of a school. Teacher leaders are essential in driving change, supporting colleagues, and helping students towards academic success. Education reform in China has included strategies for developing teacher leadership. However, at the school level, there still needs to be more research and understanding of the concept in many areas. This study aimed to develop a teacher leadership model for middle school teachers in Shanxi Province, China. The study utilized exploratory mixed methods with both qualitative and quantitative analysis to develop an instrument that was subsequently used for data collection from 825 middle school teachers. By using regression analysis and interviews, elements of the model were confirmed, and it was found that to develop teacher leadership in the target middle schools, the following concepts need to be encouraged: principal leadership, peer relationships, professionalism, and leadership skills. In addition, promoting teacher leadership requires the cooperation and support of teachers, school principals, and governmental regulators. Recommendations included promoting decentralized leadership structures within schools to provide opportunities for teacher input into school policy, curriculum, and professional development. For teachers, it is essential to recognize their dual roles as "teachers" and "leaders" to encourage their participation in school management

Primes in the intersection of two Piatetski-Shapiro sets

Let $\pi(x;\gamma_1,\gamma_2)$ denote the number of primes $p$ with $p\leqslant x$ and $p=\lfloor n^{1/\gamma_1}_1\rfloor=\lfloor n^{1/\gamma_2}_2\rfloor$, where $\lfloor t\rfloor$ denotes the integer part of $t\in\mathbb{R}$ and $1/2<\gamma_2<\gamma_1<1$ are fixed constants. In this paper, we show that $\pi(x;\gamma_1,\gamma_2)$ holds an asymptotic formula for $21/11<\gamma_1+\gamma_2<2$, which constitutes an improvement upon the previous result of Baker [1].Comment: 13 page

Small polaron with generic open boundary conditions revisit: exact solution via the off-diagonal Bethe ansatz

The small polaron, an one-dimensional lattice model of interacting spinless fermions, with generic non-diagonal boundary terms is studied by the off-diagonal Bethe ansatz method. The presence of the Grassmann valued non-diagonal boundary fields gives rise to a typical $U(1)$-symmetry-broken fermionic model. The exact spectra of the Hamiltonian and the associated Bethe ansatz equations are derived by constructing an inhomogeneous $T-Q$ relation.Comment: 12 pages, no figure, published versio

Investment choice and perceived mating intentions regulated by external resource cues and internal fluctuation in blood glucose levels

We examined resource allocation priorities in the framework of an updated Maslow hierarchy of fundamental human needs. In Experiment 1, the participants in the food abundance priming condition viewing photos of high-calorie food allocated more money to savings than to spending. However, the participants preferred spending to savings under the condition of mating availability priming with romantic photographs. In Experiment 2, before and after drinking either water or a sugary beverage, fasting participants rated photos of a conversation between a man and a woman. Water drinking lowered the rating scores of mating intentions as well as blood glucose (BG) levels. The sugary drink buffered this decline in sexual perceptivity. Overall, the change in BG levels was positively associated with changes in the ratings of mating intentions but was not associated with other likelihood ratings. These results suggest that both external cues of food and mating resources and internal BG fluctuation regulate the cognitive priority of physiological needs vs. mate acquisition and retention.</p