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Survey and Thought of Financial Management and Education in High School Students in Nanjing  [PDF]
Weiyi Su, Mengting Deng
Creative Education (CE) , 2012, DOI: 10.4236/ce.2012.32036
Abstract: There is a need to improve the financial management ability of high school students in China. This paper carries on a questionnaire survey among some high school students in Nanjing, then analyzes and sumarizes the survey data in order to know the students’ consumption psychology, financial management consciousness and financial education situation. The initial findings reveal that there is limited knowledge of the concept of financial management in high school students. This is reflected in the ability of independent living of high school students being improved. So, this paper has some specific suggestions, e.g. financial institutions and social should provide a wide variety of financial products which are suitable for high school students, and set up education bank so as to keep the sustainable development of education cause. Schools may establish parents committee in order to strengthen the relations between parents and schools, complete the quality-oriented education including financial education.
How BMP-2 induces EMT and breast cancer stemness through Rb and CD44?
Anan Chen,Ge Liu,Guanglin Zhang,Ju Wang,Peide Huang,Weiyi He,Zhen Li
- , 2018, DOI: 10.1038/s41419-017-0037-0
Abstract: This scheme depicts the signaling pathways via which BMP-2 induces EMT and stemness of breast cancer cells through Rb and CD44 and contributes to breast cancer metastasis. The PI3K/AKT and Smad signaling pathways are implicated in the BMP-2-mediated regulation of Rb and CD44, and a crosstalk exists between Rb and CD44 signaling pathway
Particle Swarm Optimization Based Fire Risk Valuation Model: Shopping-Mall  [PDF]
Syed Salman Ali Shah, Zhixiang Xing, Jie Wu, Weiyi Ju, Muhammad Usama Raza
Open Journal of Safety Science and Technology (OJSST) , 2022, DOI: 10.4236/ojsst.2022.124010
Abstract: In view of the shortcomings of the existing small-scale shopping mall fire prediction models, the effectiveness and scalability of the prediction results, a BP neural network prediction model is constructed to improve the prediction accuracy by considering a variety of fire risk factors. On this basis, the convergence speed of the BP neural network is accelerated with the help of？the particle swarm optimization (PSO) algorithm. Then, a mixed multi-factor shopping mall fire risk grade prediction model based on a PSO based back-propagation (PSO-BP) neural network model is proposed. The constructed prediction model can simultaneously consider climate factors (daily maximum temperature, daily average temperature, 24-h precipitation, continuous drought days, sunshine hours, daily average relative humidity, and daily average wind speed), landform factors (altitude, slope, slope direction, soil water content), combustible factors (vegetation type, combustible water content, ground cover load), and human factors (density of population, distance from human activity area). Based on the actual data and field measurement data collected by the sensor network of the shopping mall (Lahore, Pakistan), the validity of the proposed model was verified by a group of experiments. The results show that the model based on the training data set and the test samples can effectively predict the fire risk level; the computational complexity of the model is significantly lower than that of the BP neural network model alone.
An Efficient Algorithm for Processing Multi-Relation Queries in Relational Databases
Liu,Weiyi
计算机科学技术学报 , 1990,
Abstract: After a relation scheme R is decomposed into the set of schemes ρ={R1，…，Rn},we may pose queries as if Rexisted in the database,taking a join of Ri‘s,when it is necessary to implement the query,Suppos a query involves a set of attributes S R，we want to find the smallest subset of ρ whose union includes.S.We prove that the problem is NP-complete and present a polynomial-bounded approximation algorithm.A subset of ρ whose union includes S and has a decomposition into 3NF with a lossless join and preservation of dependencies in given in the paper.
Geometric structures, Gromov norm and Kodaira dimensions
Weiyi Zhang
Mathematics , 2014,
Abstract: We define the Kodaira dimension for $3$-dimensional manifolds through Thurston's eight geometries, along with a classification in terms of this Kodaira dimension. We show this is compatible with other existing Kodaira dimensions and the partial order defined by non-zero degree maps. For higher dimensions, we explore the relations of geometric structures and mapping orders with various Kodaira dimensions and other invariants. Especially, we show that a closed geometric $4$-manifold has nonvanishing Gromov norm if and only if it has geometry $\mathbb H^2\times \mathbb H^2$, $\mathbb H^2(\mathbb C)$ or $\mathbb H^4$.
The curve cone of almost complex 4-manifolds
Weiyi Zhang
Mathematics , 2015,
Abstract: In this paper, we prove the cone theorem for any almost complex 4-manifold which is tamed by a symplectic form. For small rational surfaces and minimal ruled surfaces, we study the configuration of negative curves. As an application, we prove the Nakai-Moishezon type duality for all almost K\"ahler structures on $\mathbb CP^2\#k\overline{\mathbb CP^2}$ with $k\le 9$ and minimal ruled surfaces with a negative curve. This is proved using a version of Gram-Schmidt orthogonalization process for $J$-tamed symplectic inflation.
The Feasibility of the Drone Delivery System for Woolworths  [PDF]
Weiyi Du
Intelligent Information Management (IIM) , 2022, DOI: 10.4236/iim.2022.144009
Abstract: The report aims to assess the feasibility of Woolworths’ drone delivery system and propose a well-documented solution to this, enabling Woolworths to make decisions about improving its traditional delivery system. This paper analyzes the examples of UAV delivery in the actual situation, points out the existing problems, and then evaluates the feasibility of UAV delivery in the future. This report firstly analyzes the current situation of the use of UAVs and points out the shortcomings of Woolworths’ current delivery system. To be specific, from Woolworths’ point of view, the current distribution system is unsuitable for remote distribution, and the human cost is too high. It also did not produce the expected customer satisfaction, was heavily influenced by the environment and congestion, and did not meet the goal of “no contact” under coronavirus care. This report then evaluates Woolworths’ proposal for a “Drone Delivery System” in the framework of future state analysis. It describes the overall objective and breaks it down into several measurable goals, including enhancing customer loyalty, increasing sales revenue, improving delivery efficiency, and ensuring safety through contactless delivery. In addition, a risk assessment was conducted to identify potential risks associated with this new delivery system. Identify and assess the possibility, impact and treatment of potential risks through the risk register. Subsequently, this report identifies four gaps between Woolworths’ current and future state delivery systems, including emergency delivery failures high freight costs, unmet on-time delivery rates and high risk of COVID-19 infection, and recommends actions to close the gap. Finally, delivering solutions for Woolworths through use cases from a system, process, and people perspective helps the organization determine how to seize opportunities and implement solutions. The results show that there are still many problems in using UAVs for delivery at the present stage, and many aspects should be improved.
The Hilbert transform along the extended evil ladder curve
Baoyi Wu,Weiyi Su
Chinese Science Bulletin , 1999, DOI: 10.1007/BF03182884
Abstract: Let $\tilde \gamma (t)$ be an even function extended by the evil ladder (tri-adic Cantor function) γ(t). Denote the curve $\Gamma (t) = (t, \tilde \gamma (t))$ (-1≤1≤1). It is shown that the Hilbert transform along this curve Γ is bounded onL 2( 2).
Research of China’s Credit Currency Mismatch
Rui Cui,Weiyi Wang
Asian Social Science , 2010, DOI: 10.5539/ass.v6n4p71
Abstract: Large positive current mismatch exists in China at present, and with the continual development of financial reform, the risk of the current mismatch will gradually diffuse from the micro layer to the macro layer, so it is very important to study China’s credit currency mismatch. Based on the theoretical research of the credit currency mismatch, the formula of AECM is used to measure the level of China’s credit currency mismatch, and the causes are analyzed, and corresponding policy advices are proposed in this article.
The band-gap structures and recovery rules of generalized n-component Fibonacci piezoelectric superlattices
Da Liu,Weiyi Zhang
Physics , 2010, DOI: 10.1016/j.ssc.2011.01.022
Abstract: The spectral evolution from periodic structure to random structure has always been an interesting topic in solid state physics, the generalized n-component Fibonacci sequences (n- CF) provide a convenient tool to investigate such process since its randomness can be controlled via the parameter n. In this letter, the band-gap structures of n-CF piezoelectric superlattices have been calculated using the transfer-matrix-method, the self-similarity behavior and recovery rule have been systematically analyzed. Consistent with the rigorous mathematical proof by Hu et al.[A. Hu et al. Phys. Rev. B. 48, 829 (1993)], we find that the n-CF sequences with 2 \leq n \leq 4 are identified as quasiperiodic. The imaginary wave numbers are characterized by the self-similar spectrum, their major peaks can all be properly indexed. In addition, we find that the n = 5 sequence belongs to a critical case which lies at the border between quasiperiodic to aperiodic structures. The frequency range of self-similarity pattern approaches to zero and a unique indexing of imaginary wave numbers becomes impossible. Our study offers the information on the critical 5-CF superlattice which was not available before. The classification of band-gap structures and the scaling laws around fixed points are also given.
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