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Search Results: 1 - 10 of 6336 matches for " Ruoting Pei "
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Empirical Research on Critical Success Factors of Agile Software Process Improvement  [PDF]
Jiangping Wan, Ruoting Wang
Journal of Software Engineering and Applications (JSEA) , 2010, DOI: 10.4236/jsea.2010.312132
Abstract: In this paper, we discuss agile software process improvement in P company with their description of process management in current level and analysis of problems, design the P Company success factors model in organizational culture, systems, products, customers, markets, leadership, technology and other key dimensions, which is verified through questionnaire in P company. In the end, we apply knowledge creation theory to analyze the open source software community with successful application of the typical agile software method, propose ten principles of knowledge creation in open source software community: Self-organizing, Code sharing, Adaptation, Usability, Sustention, Talent, Interaction, Collaboration, Happiness, and Democracy.
The Exploratory Analysis on Knowledge Creation Effective Factors in Software Requirement Development  [PDF]
Jiangping Wan, Ruoting Wang
Journal of Software Engineering and Applications (JSEA) , 2010, DOI: 10.4236/jsea.2010.36067
Abstract: The knowledge creation effective factors were found in both necessary elements for stimulus of knowledge creation and the key influencing factors of software project success. The research was carried with the specific successful practices of Microsoft Corporation and William Johnson’s analysis of R & D project knowledge creation. The knowledge creation effective factors in requirement development project are clarified through deeply interviewing the software enterprises in Guangdong province as well as other corporate information departments. The effective factors are divided with R & D project knowledge creation model in the view of organizational, team, personal and technical four levels through literature research and interview in enterprises, and the empirical study was done with questionnaire and exploratory analysis.
Viscosity and Principal-Agent Problem
Ruoting Gong,Christian Houdré
Mathematics , 2009,
Abstract: We develop a stochastic control system from a continuous-time Principal-Agent model in which both the principal and the agent have imperfect information and different beliefs about the project. We consider the agent's problem in this stochastic control system, i.e., we attempt to optimize the agent's utility function under the agent's belief. Via the corresponding Hamilton-Jacobi-Bellman equation the value function is shown to be jointly continuous and to satisfy the Dynamic Programming Principle. These properties directly lead to the conclusion that the value function is a viscosity solution of the HJB equation. Uniqueness is then also established.
The Application of a Surface Response Methodology in the Solar/UV-Induced Degradation of Dairy Wastewater Using Immobilized ZnO as a Semiconductor
Gisella R. Lamas Samanamud,Helcio J. Izario Filho,Carla C. A. Loures,Ivy S. Oliveira,Andre L. Souza,Ana Paula B. R. de Freitas,Ruoting Pei
International Journal of Chemical Engineering , 2013, DOI: 10.1155/2013/393467
Abstract: An Advanced Oxidation Process (AOPs) was carried out in this study with the use of immobilized ZnO and solar/UV as an energy source to degrade dairy wastewater. The semibatch reactor system consisted of metal plate of 800 × 250?mm and a glass tank. The reaction time was of 3?h for 3?L of dairy wastewater. Experiments were performed based on a surface response methodology in order to optimize the photocatalytic process. Degradation was measured in percentage terms by total organic carbon (TOC). The entry variables were ZnO coating thickness and pH, using three levels of each variable. The optimized results showed a TOC degradation of 31.7%. Optimal parameters were metal-plate coating of 100?μm of ZnO and pH of 8.0. Since solar/UV is a constant and free energy source in most tropical countries, this process tends to suggest an interesting contribution in dairy wastewater treatment, especially as a pretreatment and the optimal conditions to guarantee a better efficiency of the process. 1. Introduction The use of ZnO as a semiconductor was studied for possible application in a photo-excitation-initiated degradation of the catalyst followed by the formation of a surface bandgap (see (1)). The oxidation potential ( ) permits the formation of active intermediates by the direct oxidation of an organic matter (see (2)). Many reactive hydroxyl radicals can be formed either by decomposition of water or by a bandgap reaction with (see (3) and (4)). The Hydroxyl radical is a powerful nonselective oxidation agent leading to organic pollutants degradation [1–3]. Consider that The methodologies used in the design of experiments allow a similar result as the one obtained from conventional experiments with the advantage of the use of fewer experiments. Thus, a good design of experiments can provide sufficient results for an effective statistical analysis [4]. In order to obtain the optimized variables for the study of dairy wastewater photocatalytic treatment, a surface response methodology was employed. Dairy wastewater does not generally contain inherently toxic chemical substances, but it is composed of dissolved organic compounds that are not easily degradable by biological treatment without a prior treatment. In fact, this limitation affects the efficiency of the treatment through pH (depending on the type of dairy), overload of the system, and sludge volume. Moreover, dairy wastewater also produces an unpleasant odor and consists of a liquid with a significant color if the organic load is high enough [5–7]. 2. Materials and Methodology 2.1. Sampling and
Optimization of Extraction Technology of Herba Epimedii Dispensing Granules by Orthogonal Experiment
正交试验法优选淫羊藿配方颗粒的提取工艺

Liu Huihui,Tan Pei,Zhang Hui,Yan Ping,Liang Xiaoyin,Zhang Min,Zhan Ruoting,
刘晖晖
,谭沛,张辉,严萍,梁小银,张敏,詹若挺

世界科学技术-中医药现代化 , 2012,
Abstract: This study was aimed to optimize the extraction process of Herba Epimedii dispensing granules. The extraction process of Herba Epimedii dispensing granules was optimized through orthogonal experiment while the content of general flavone and icariin. And the yield of dry extract was adopted as marks. And influences of solvent dosage, extraction time and extraction times were studies. The results showed that optimized extraction conditions of Herba Epimedii dispensing granules were determined as follows. The material was added 13 times amount of water, soaked for 0.5 h and extracted for 1 h at the first time. And for the second time, 10 times amount of water were added, and extracted for 1 h. It was concluded that the extraction process is efficacious for general flavone and icariin extraction. The method is suitable for the standardized production technology of Herba Epimedii dispensing granules.
The Danger Is Growing! A New Paradigm for Immune System Activation and Peripheral Tolerance
Sharon Bewick,Ruoting Yang,Mingjun Zhang
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0008112
Abstract: Successful immune defense is a complex balancing act. In order to protect a host against invasion by harmful pathogens, an immune response must be rapid and vigorous, and must eliminate foreign invaders before their populations grow beyond control. That same immune response, however, must be selective enough to recognize and ignore commensal bacteria, environmental antigens and host tissue itself. How the immune system makes the crucial decision whether or not to attack a particular antigen has been a long-standing question central to the study of immunology. Here we show that the structure of the signaling network between regulatory T-cells and type 17 helper T-cells allows the immune system to selectively attack pathogens based on whether or not the pathogens represent a growing, and thus dangerous population. We term this mechanism for immune system activation the ‘Growth Detection Paradigm’, because it offers an entirely new explanation for immune system regulation and peripheral tolerance.
A Central Limit Theorem for the Optimal Alignments Score in Multiple Random Words
Ruoting Gong,Christian Houdré,ümit I?lak
Mathematics , 2015,
Abstract: Let $\mathbf{X}^{(1)}_{n},\ldots,\mathbf{X}^{(m)}_{n}$, where $\mathbf{X}^{(i)}_{n}=(X^{(i)}_{1},\ldots,X^{(i)}_{n})$, $i=1,\ldots,m$, be $m$ independent sequences of independent and identically distributed random variables taking their values in a finite alphabet $\mathcal{A}$. Let the score function $S$, defined on $\mathcal{A}^{m}$, be non-negative, bounded, permutation-invariant, and satisfy a bounded differences condition. Under a variance lower-bound assumption, a central limit theorem is proved for the optimal alignments score of the $m$ random words.
Lower Bounds on the Generalized Central Moments of the Optimal Alignments Score of Random Sequences
Ruoting Gong,Christian Houdré,Jüri Lember
Mathematics , 2015,
Abstract: We present a general approach to the problem of determining tight asymptotic lower bounds for generalized central moments of the optimal alignment score of two independent sequences of i.i.d. random variables. At first these are obtained under a main assumption for which sufficient conditions are provided. When the main assumption fails, we nevertheless develop a "uniform approximation" method leading to asymptotic lower bounds. Our general results are then applied to the length of the longest common subsequence for binary strings, in which case asymptotic lower bounds are obtained for the moments and the exponential moments of the optimal score. As a byproduct, a local upper bound on the rate function associated with the length of the longest common subsequence is also obtained.
External Control of the GAL Network in S. cerevisiae: A View from Control Theory
Ruoting Yang,Scott C. Lenaghan,John P. Wikswo,Mingjun Zhang
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0019353
Abstract: While there is a vast literature on the control systems that cells utilize to regulate their own state, there is little published work on the formal application of control theory to the external regulation of cellular functions. This paper chooses the GAL network in S. cerevisiae as a well understood benchmark example to demonstrate how control theory can be employed to regulate intracellular mRNA levels via extracellular galactose. Based on a mathematical model reduced from the GAL network, we have demonstrated that a galactose dose necessary to drive and maintain the desired GAL genes' mRNA levels can be calculated in an analytic form. And thus, a proportional feedback control can be designed to precisely regulate the level of mRNA. The benefits of the proposed feedback control are extensively investigated in terms of stability and parameter sensitivity. This paper demonstrates that feedback control can both significantly accelerate the process to precisely regulate mRNA levels and enhance the robustness of the overall cellular control system.
High-order short-time expansions for ATM option prices of exponential Lévy models
José E. Figueroa-López,Ruoting Gong,Christian Houdré
Quantitative Finance , 2012,
Abstract: In the present work, a novel second-order approximation for ATM option prices is derived for a large class of exponential L\'{e}vy models with or without Brownian component. The results hereafter shed new light on the connection between both the volatility of the continuous component and the jump parameters and the behavior of ATM option prices near expiration. In the presence of a Brownian component, the second-order term, in time-$t$, is of the form $d_{2}\,t^{(3-Y)/2}$, with $d_{2}$ only depending on $Y$, the degree of jump activity, on $\sigma$, the volatility of the continuous component, and on an additional parameter controlling the intensity of the "small" jumps (regardless of their signs). This extends the well known result that the leading first-order term is $\sigma t^{1/2}/\sqrt{2\pi}$. In contrast, under a pure-jump model, the dependence on $Y$ and on the separate intensities of negative and positive small jumps are already reflected in the leading term, which is of the form $d_{1}t^{1/Y}$. The second-order term is shown to be of the form $\tilde{d}_{2} t$ and, therefore, its order of decay turns out to be independent of $Y$. The asymptotic behavior of the corresponding Black-Scholes implied volatilities is also addressed. Our approach is sufficiently general to cover a wide class of L\'{e}vy processes which satisfy the latter property and whose L\'{e}vy densitiy can be closely approximated by a stable density near the origin. Our numerical results show that the first-order term typically exhibits rather poor performance and that the second-order term can significantly improve the approximation's accuracy, particularly in the absence of a Brownian component.
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