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Search Results: 1 - 10 of 56188 matches for " Fan Wu "
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Design and Implementation of a Multi-Sensor Based Object Detecting and Removing Autonomous Robot Exploration System  [PDF]
Fan Wu, Johnathan Williams
Journal of Computer and Communications (JCC) , 2014, DOI: 10.4236/jcc.2014.27002

Developing autonomous mobile robot system has been a hot topic in AI area. With recent advances in technology, autonomous robots are attracting more and more attention worldwide, and there are a lot of ongoing research and development activities in both industry and academia. In complex ground environment, obstacles positions are uncertain. Path finding for robots in such environment is very hot issues currently. In this paper, we present the design and implementation of a multi-sensor based object detecting and moving autonomous robot exploration system, 4RE, with the VEX robotics design system. With the goals of object detecting and removing in complex ground environment with different obstacles, a novel object detecting and removing algorithms is proposed and implemented. Experimental results indicate that our robot system with our object detecting and removing algorithm can effectively detect the obstacles on the path and remove them in complex ground environment and avoid collision with the obstacles.

Constructions of Strongly Regular Cayley Graphs using Even Index Gauss Sums
Fan Wu
Mathematics , 2012,
Abstract: In this paper, generalizing the result in \cite{GXY}, we construct strongly regular Cayley graphs by using union of cyclotomic classes of $\F_q$ and Gauss sums of index $w$, where $w\geq 2$ is even. In particular, we obtain three infinite families of strongly regular graphs with new parameters.
An Overview of Mobile Malware and Solutions  [PDF]
Fan Wu, Hira Narang, Dwayne Clarke
Journal of Computer and Communications (JCC) , 2014, DOI: 10.4236/jcc.2014.212002

Mobile Security has been a rapidly growing field in the security area. With the increases of mobile devices and mobile applications, the need for mobile security has increased dramatically over the past several years. Many research and development projects on mobile security are ongoing in government, industry and academia. In this paper, we present an analysis of current mobile security problems and propose the possible solutions to malware threats. Our experiments show antimalware can protect mobile device from different types of mobile malware threats effectively.

A Case Report of Hepatopulmonary Syndrome  [PDF]
Liqiu Wu, Fan Su, Muchao Huang
Case Reports in Clinical Medicine (CRCM) , 2015, DOI: 10.4236/crcm.2015.49061
Abstract: Hepatopulmonary syndrome (HPS) is a severe complication of end-stage hepatic disease. However, the majority of HPS patients present with non-specific clinical manifestations and imaging features. They are constantly misdiagnosed as interstitial pneumonia, pulmonary infection or heart failure and appropriate treatment is thus delayed. In this report, clinical manifestations, diagnosis and treatment of one case of HPS were retrospectively analyzed and literature review was conducted. When the heapatic failure liver disease patients present with hypoxemia, pulmonary angiography, contrast echocardiography for right-sided heart (contrast enhanced echocardiogram) and lung perfusion scan (99mTc-MAA) should be done to exclude HPS. Orthotopic liver transplantation serves as the unique effective therapy of HPS.
An Efficient Acceleration of Solving Heat and Mass Transfer Equations with the Second Kind Boundary Conditions in Capillary Porous Composite Cylinder Using Programmable Graphics Hardware  [PDF]
Hira Narang, Fan Wu, Abdul Rafae Mohammed
Journal of Computer and Communications (JCC) , 2018, DOI: 10.4236/jcc.2018.69003
Abstract: With the recent developments in computing technology, increased efforts have gone into simulation of various scientific methods and phenomenon in engineering fields. One such case is the simulation of heat and mass transfer in capillary porous media, which is becoming more and more important in analysing various scenarios in engineering applications. Analysing such heat and mass transfer phenomenon in a given environment requires us to simulate it. This entails simulation of coupled heat mass transfer equations. However, this process of numerical solution of heat and mass transfer equations is very much time consuming. Therefore, this paper aims at utilizing one of the acceleration techniques developed in the graphics community that exploits a graphics processing unit (GPU) which is applied to the numerical solutions of heat and mass transfer equations. The nVidia Compute Unified Device Architecture (CUDA) programming model caters a good method of applying parallel computing to program the graphical processing unit. This paper shows a good improvement in the performance while solving the heat and mass transfer equations for capillary porous composite cylinder with the second kind of boundary conditions numerically running on GPU. This heat and mass transfer simulation is implemented using CUDA platform on nVidia Quadro FX 4800 graphics card. Our experimental results depict the drastic performance improvement when GPU is used to perform heat and mass transfer simulation. GPU can significantly accelerate the performance with a maximum observed speedup of more than 7-fold times. Therefore, the GPU is a good approach to accelerate the heat and mass transfer simulation.
Membrane Binding of Plasmid DNA and Endocytic Pathways Are Involved in Electrotransfection of Mammalian Cells
Mina Wu,Fan Yuan
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0020923
Abstract: Electric field mediated gene delivery or electrotransfection is a widely used method in various studies ranging from basic cell biology research to clinical gene therapy. Yet, mechanisms of electrotransfection are still controversial. To this end, we investigated the dependence of electrotransfection efficiency (eTE) on binding of plasmid DNA (pDNA) to plasma membrane and how treatment of cells with three endocytic inhibitors (chlorpromazine, genistein, dynasore) or silencing of dynamin expression with specific, small interfering RNA (siRNA) would affect the eTE. Our data demonstrated that the presence of divalent cations (Ca2+ and Mg2+) in electrotransfection buffer enhanced pDNA adsorption to cell membrane and consequently, this enhanced adsorption led to an increase in eTE, up to a certain threshold concentration for each cation. Trypsin treatment of cells at 10 min post electrotransfection stripped off membrane-bound pDNA and resulted in a significant reduction in eTE, indicating that the time period for complete cellular uptake of pDNA (between 10 and 40 min) far exceeded the lifetime of electric field-induced transient pores (~10 msec) in the cell membrane. Furthermore, treatment of cells with the siRNA and all three pharmacological inhibitors yielded substantial and statistically significant reductions in the eTE. These findings suggest that electrotransfection depends on two mechanisms: (i) binding of pDNA to cell membrane and (ii) endocytosis of membrane-bound pDNA.
Behavior of gravity waves with limited amplitude in the vicinity of critical layer
Shaoping Wu,Fan Yi
Chinese Science Bulletin , 2002, DOI: 10.1360/02tb9341
Abstract: By using the FICE scheme, a numerical simulation of three-dimensional nonlinear propagation of gravity wave packet in a wind-stratified atmosphere is presented. The whole nonlinear propagation process of the gravity wave packet is shown; the propagation behavior of gravity waves in the vicinity of critical layer is analyzed. The results show that gravity waves encounter the critical layer when propagating in the fair winds whose velocities increase with height, and the height of critical layer propagating nonlinearly is lower than that expected by the linear gravity waves theory; the amplitudes of gravity waves increase with height as a whole before gravity waves encounter the critical layer, but the increasing extent is smaller than the result given by the linear theory of gravity waves, while the amplitudes of gravity waves reduce when gravity waves meet the critical layer; the energy of wave decreases with height, especially at the critical layer; the vertical wavelength reduces with the height increasing, but it does not become zero.
Analysis on Financial Risks of Derivation and Preventive Measures
Yu Pan,Fan Wu
International Business Research , 2009, DOI: 10.5539/ibr.v2n4p73
Abstract: Financial derivatives, as innovative financial instrument, have been designed for enterprises to avoid financial risks. Most of these derivatives rely on future trends of traditional tools, such as valuation, interest rates and exchange rates. Such expected future transactions or events can not be recognized as assets because they do not meet the definition of assets, economic resources owned or controlled by enterprises and only made by past transactions. The use of the traditional accounting model does not accurately disclose this kind of "off-balance-sheet items," and their impact on financial statements. This paper provides some methods for enterprises and government to appropriately recognize and reveal the risks and benefits of financial derivatives.
Analysis of the Current Financial Crisis from an Accounting Point of View
Fan Wu,Yu Pan
International Journal of Business and Management , 2009, DOI: 10.5539/ijbm.v4n10p135
Abstract: The subprime mortgage crisis which started from early 2007 has gradually become the evolution of the global financial crisis, thus will inevitably bring a significant impact on the real economy over the next period of time. This paper is to elaborate on how the accounting will impact the financial crisis, as well as the development of the accounting, from the point of view of accounting standards, disclosure of accounting information and the accounting measurement attributes.
Exponential decay for the semilinear wave equation with source terms
Jishan Fan,Hongwei Wu
Electronic Journal of Differential Equations , 2006,
Abstract: In this paper, we prove that for a semilinear wave equation with source terms, the energy decays exponentially as time approaches infinity. For this end we use the the multiplier method.
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