323 research outputs found
Trust in China: A Cross-Regional Analysis
Using the cross-regional data, this paper shows that trust has a strong effect on uneven development of economy in China. As is discovered in many studies, it is found that trust affects the growth of economy, size distribution of enterprise, and FDI inflow and so on. We also find that cross-regional differences of trust in China are reflections of the regional diversities of education, marketization of economies, urbanization, population density and transportation facilities. Although not statistically significant, “too many officials” may damage social trust. The paper demonstrates that trust cannot simply be taken as a cultural heritage. The paper also argues that sustainability of further economic development of China much depends on how fast China can build trust-facilitating institution, and that the most fundamental institution for trust is the property right.Trust, Economic performance, Information Repeated game, Transaction
Ownership, Efficiency, and Firm Survival in Economic Transition: Evidence from a Chinese Science Park
A fourth-order unfitted characteristic finite element method for solving the advection-diffusion equation on time-varying domains
We propose a fourth-order unfitted characteristic finite element method to
solve the advection-diffusion equation on time-varying domains. Based on a
characteristic-Galerkin formulation, our method combines the cubic MARS method
for interface tracking, the fourth-order backward differentiation formula for
temporal integration, and an unfitted finite element method for spatial
discretization. Our convergence analysis includes errors of discretely
representing the moving boundary, tracing boundary markers, and the spatial
discretization and the temporal integration of the governing equation.
Numerical experiments are performed on a rotating domain and a severely
deformed domain to verify our theoretical results and to demonstrate the
optimal convergence of the proposed method
MDFL: Multi-domain Diffusion-driven Feature Learning
High-dimensional images, known for their rich semantic information, are
widely applied in remote sensing and other fields. The spatial information in
these images reflects the object's texture features, while the spectral
information reveals the potential spectral representations across different
bands. Currently, the understanding of high-dimensional images remains limited
to a single-domain perspective with performance degradation. Motivated by the
masking texture effect observed in the human visual system, we present a
multi-domain diffusion-driven feature learning network (MDFL) , a scheme to
redefine the effective information domain that the model really focuses on.
This method employs diffusion-based posterior sampling to explicitly consider
joint information interactions between the high-dimensional manifold structures
in the spectral, spatial, and frequency domains, thereby eliminating the
influence of masking texture effects in visual models. Additionally, we
introduce a feature reuse mechanism to gather deep and raw features of
high-dimensional data. We demonstrate that MDFL significantly improves the
feature extraction performance of high-dimensional data, thereby providing a
powerful aid for revealing the intrinsic patterns and structures of such data.
The experimental results on three multi-modal remote sensing datasets show that
MDFL reaches an average overall accuracy of 98.25%, outperforming various
state-of-the-art baseline schemes. The code will be released, contributing to
the computer vision community
The Effects of Corporate Governance on the Innovation Performance of Chinese SMEs
We investigate the degree to which corporate governance and ownership affects the innovation performance of firms in China with a particular focus on privately owned small and medium enterprises (SMEs). We hypothesize that (1) board-related governance measures will enhance innovation because they improve monitoring and provide access to necessary resources; (2) ownership concentration initially facilitates innovation because large shareholders are more likely to commit to the long-term nature of innovation, and have the incentive to monitor managers whose time horizon may be shorter; however we argue that these effects weaken as large shareholders becomes entrenched at higher levels of concentration; and (3) hiring an external CEO will enhance innovation both by ensuring professional management of the company, and by alleviating the entrenchment possibilities associated with large shareholders. These hypotheses are tested using a unique sample of 370 mostly private and relatively small Chinese firms in Zhejiang province, for the period 2004 to 2006. The results suggest that for this sample, corporate governance and ownership affect innovation activity when measured by patenting activity, but not when measured by new product sales
Finite-time lag projective synchronization of delayed fractional-order quaternion-valued neural networks with parameter uncertainties
This paper discusses a class issue of finite-time lag projective synchronization (FTLPS) of delayed fractional-order quaternion-valued neural networks (FOQVNNs) with parameter uncertainties, which is solved by a non-decomposition method. Firstly, a new delayed FOQVNNs model with uncertain parameters is designed. Secondly, two types of feedback controller and adaptive controller without sign functions are designed in the quaternion domain. Based on the Lyapunov analysis method, the non-decomposition method is applied to replace the decomposition method that requires complex calculations, combined with some quaternion inequality techniques, to accurately estimate the settling time of FTLPS. Finally, the correctness of the obtained theoretical results is testified by a numerical simulation example
A uniform preconditioner for a Newton algorithm for total-variation minimization and minimum-surface problems
Solution methods for the nonlinear partial differential equation of the
Rudin-Osher-Fatemi (ROF) and minimum-surface models are fundamental for many
modern applications. Many efficient algorithms have been proposed. First order
methods are common. They are popular due to their simplicity and easy
implementation. Some second order Newton-type iterative methods have been
proposed like Chan-Golub-Mulet method. In this paper, we propose a new
Newton-Krylov solver for primal-dual finite element discretization of the ROF
model. The method is so simple that we just need to use some diagonal
preconditioners during the iterations. Theoretically, the proposed
preconditioners are further proved to be robust and optimal with respect to the
mesh size, the penalization parameter, the regularization parameter, and the
iterative step, essentially it is a parameter independent preconditioner. We
first discretize the primal-dual system by using mixed finite element methods,
and then linearize the discrete system by Newton\textquoteright s method.
Exploiting the well-posedness of the linearized problem on appropriate Sobolev
spaces equipped with proper norms, we propose block diagonal preconditioners
for the corresponding system solved with the minimum residual method. Numerical
results are presented to support the theoretical results.Comment: 22 pages, 24 figure
Trust in China: A Cross-Regional Analysis
Using the cross-regional data, this paper shows that trust has a strong effect on uneven development of economy in China. As is discovered in many studies, it is found that trust affects the growth of economy, size distribution of enterprise, and FDI inflow and so on. We also find that cross-regional differences of trust in China are reflections of the regional diversities of education, marketization of economies, urbanization, population density and transportation facilities. Although not statistically significant, “too many officials” may damage social trust. The paper demonstrates that trust cannot simply be taken as a cultural heritage. The paper also argues that sustainability of further economic development of China much depends on how fast China can build trust-facilitating institution, and that the most fundamental institution for trust is the property right.http://deepblue.lib.umich.edu/bitstream/2027.42/39972/3/wp586.pd
Guided Hybrid Quantization for Object detection in Multimodal Remote Sensing Imagery via One-to-one Self-teaching
Considering the computation complexity, we propose a Guided Hybrid
Quantization with One-to-one Self-Teaching (GHOST}) framework. More concretely,
we first design a structure called guided quantization self-distillation
(GQSD), which is an innovative idea for realizing lightweight through the
synergy of quantization and distillation. The training process of the
quantization model is guided by its full-precision model, which is time-saving
and cost-saving without preparing a huge pre-trained model in advance. Second,
we put forward a hybrid quantization (HQ) module to obtain the optimal bit
width automatically under a constrained condition where a threshold for
distribution distance between the center and samples is applied in the weight
value search space. Third, in order to improve information transformation, we
propose a one-to-one self-teaching (OST) module to give the student network a
ability of self-judgment. A switch control machine (SCM) builds a bridge
between the student network and teacher network in the same location to help
the teacher to reduce wrong guidance and impart vital knowledge to the student.
This distillation method allows a model to learn from itself and gain
substantial improvement without any additional supervision. Extensive
experiments on a multimodal dataset (VEDAI) and single-modality datasets (DOTA,
NWPU, and DIOR) show that object detection based on GHOST outperforms the
existing detectors. The tiny parameters (<9.7 MB) and Bit-Operations (BOPs)
(<2158 G) compared with any remote sensing-based, lightweight or
distillation-based algorithms demonstrate the superiority in the lightweight
design domain. Our code and model will be released at
https://github.com/icey-zhang/GHOST.Comment: This article has been delivered to TRGS and is under revie
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