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Search Results: 1 - 10 of 8409 matches for " Yansha Deng "
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Variance-Constrained Capacity of the Molecular Timing Channel with Synchronization Error
Malcolm Egan,Yansha Deng,Maged Elkashlan,Trung Q. Duong
Mathematics , 2014,
Abstract: Molecular communication is set to play an important role in the design of complex biological and chemical systems. An important class of molecular communication systems is based on the timing channel, where information is encoded in the delay of the transmitted molecule---a synchronous approach. At present, a widely used modeling assumption is the perfect synchronization between the transmitter and the receiver. Unfortunately, this assumption is unlikely to hold in most practical molecular systems. To remedy this, we introduce a clock into the model---leading to the molecular timing channel with synchronization error. To quantify the behavior of this new system, we derive upper and lower bounds on the variance-constrained capacity, which we view as the step between the mean-delay and the peak-delay constrained capacity. By numerically evaluating our bounds, we obtain a key practical insight: the drift velocity of the clock links does not need to be significantly larger than the drift velocity of the information link, in order to achieve the variance-constrained capacity with perfect synchronization.
Safeguarding Massive MIMO Aided HetNets Using Physical Layer Security
Yansha Deng,Lifeng Wang,Kai-Kit Wong,Arumugam Nallanathan,Maged Elkashlan
Mathematics , 2015,
Abstract: This paper exploits the potential of physical layer security in massive multiple-input multiple-output (MIMO) aided two-tier heterogeneous networks (HetNets). We focus on the downlink secure transmission in the presence of multiple eavesdroppers. We first address the impact of massive MIMO on the maximum receive power based user association. We then derive the tractable upper bound expressions for the secrecy outage probability of a HetNets user.We show that the implementation of massive MIMO significantly improves the secrecy performance, which indicates that physical layer security could be a promising solution for safeguarding massive MIMO HetNets. Furthermore, we show that the secrecy outage probability of HetNets user first degrades and then improves with increasing the density of PBSs.
Molecular Communication with a Reversible Adsorption Receiver
Yansha Deng,Adam Noel,Maged Elkashlan,Arumugam Nallanathan,Karen C. Cheung
Mathematics , 2015,
Abstract: In this paper, we present an analytical model for a diffusive molecular communication (MC) system with a reversible adsorption receiver in a fluid environment. The time-varying spatial distribution of the information molecules under the reversible adsorption and desorption reaction at the surface of a bio-receiver is analytically characterized. Based on the spatial distribution, we derive the number of newly-adsorbed information molecules expected in any time duration. Importantly, we present a simulation framework for the proposed model that accounts for the diffusion and reversible reaction. Simulation results show the accuracy of our derived expressions, and demonstrate the positive effect of the adsorption rate and the negative effect of the desorption rate on the net number of newly-adsorbed information molecules expected. Moreover, our analytical results simplify to the special case of an absorbing receiver.
The Unreasonable Effectiveness of Blood Pressure Measurement: Molecular Communication in Biological Systems
Malcolm Egan,Adam Noel,Yansha Deng,Maged Elkashlan,Trung Q. Duong
Quantitative Biology , 2014,
Abstract: Arterial blood pressure is a key vital sign for the health of the human body. As such, accurate and reproducible measurement techniques are necessary for successful diagnosis. Blood pressure measurement is an example of molecular communication in regulated biological systems. In general, communication in regulated biological systems is difficult because the act of encoding information about the state of the system can corrupt the message itself. In this paper, we propose three strategies to cope with this problem to facilitate reliable molecular communication links: communicate from the outskirts; build it in; and leave a small footprint. Our strategies---inspired by communication in natural biological systems---provide a classification to guide the design of molecular communication mechanisms in synthetic biological systems. We illustrate our classification using examples of the first two strategies in natural systems. We then consider a molecular link within a model based on the Michaelis-Menten kinetics. In particular, we compute the capacity of the link, which reveals the potential of communicating using our leave a small footprint strategy. This provides a way of identifying whether the molecular link can be improved without affecting the function, and a guide to the design of synthetic biological systems.
The Empirical Study on Development Value Identity and Requirement of Central Plains Folk Custom Sports Cultural Resources  [PDF]
Deng Fenglian
Creative Education (CE) , 2012, DOI: 10.4236/ce.2012.37B023

Utilizing the methods of documentary research, fieldwork, expert interviwing and so on, this paper have taken much survey in terms of cognition and value identity situation of Central Plains folk custom sports culture, the motivation of attending this activity, the development requirement trend and this culture heritage development and creation requirement trend and so on to realize the value identity and requirement of Central Plains folk custom sports cultural resources development from the public, further to wake up the attention from the public about this cultural resources which provide the culture and heritage protection, ecnomic constructure and culture constrcture with theoretical references and practical instruction.

A Note on a Combinatorial Conjecture  [PDF]
Guixin Deng
Open Journal of Discrete Mathematics (OJDM) , 2013, DOI: 10.4236/ojdm.2013.31010
Abstract: It is difficult to find Boolean functions achieving many good cryptographic properties. Recently, Tu and Deng obtained two classes of Boolean functions with good properties based on a combinatorial conjecture about binary strings. In this paper, using different approaches, we prove this conjecture is true in some cases. This conjecture has resisted different attempts of proof since it is hard to find a recursive method. In this paper we give a recursive formula in a special case.
The Herd Behavior of Risk-Averse Investor Based on Information Cost  [PDF]
Guangming Deng
Journal of Financial Risk Management (JFRM) , 2013, DOI: 10.4236/jfrm.2013.24015
Abstract: In this paper, the traditional model of herd behavior was improved and extended. The herd behavior of risk-averse investor based on information cost was studied in the financial market. By refining the concept of Bayes equilibrium and the analysis of the behavior of investors, it was discovered that the herd behavior of the second risk-averse investor did not produce until the first risk-averse investors chose to buy information.
Why “Ding-Dong Community” Cannot Succeed Like American Version “Nextdoor”?  [PDF]
Pei Deng
Journal of Service Science and Management (JSSM) , 2015, DOI: 10.4236/jssm.2015.84065
Abstract: The conception of community O2O is very popular currently in China, which has become the focus of attention in the field of e-commerce. However, since at the preliminary exploration stage everything in this area changes very quickly, there is not yet mature business model to mimic. Many of the problems should be studied and clarified. Taking the rise and failure of “ding-dong district” as a case, this article attempts to analyze the unsuccessful reason that “ding-dong district” imitates the US version “Nextdoor” in the context of China, and put forward the corresponding countermeasures and suggestions, aiming to provide related reference for Chinese enterprises in the exploration and development of community e-commerce.
Three Principles of the Establishment of National Park System and Their Implications for China’s Practice  [PDF]
Zhaoming Deng
Open Journal of Business and Management (OJBM) , 2016, DOI: 10.4236/ojbm.2016.43042
Abstract: The idea of National Park is widely accepted in the world, which has also become a scientific measure for sustainable development. Despite of the fact that the management mechanisms of national parks in different countries may differ, there are three principles which are shared by the international national parks and to be maintained, namely, people oriented, state dominance, and adjusting measures to local conditions. People oriented is the most fundamental principle as well as the primary purpose of the construction of national park, while state dominance and adjusting measures to local conditions are two guarantees of the fulfillment of social welfare. In order to construct the Chinese national park system, China should learn from international experiences and adopt the three principles. During this transitional and learning period, China is confronted with several problems, such as “tragedy of commons”, multi-sectoral management, insufficient fund etc. To deal with these issues, the current Chinese national-level parks should be carefully chosen as pilot projects, and then a unified legal system and management system should be gradually set up during this trail period. Eventually, an integrated and comprehensive Chinese National Park system should be established.
On the Politeness Strategies in Chinese Internet Relay Chat Communication  [PDF]
Jing Deng
Open Journal of Modern Linguistics (OJML) , 2016, DOI: 10.4236/ojml.2016.64030
Abstract: As a prevalent synchronous form of CMC communication, internet relay chat (IRC) is a major mode of real-time CMC communication in today’s Chinese society. Under the framework of Brown and Levinson’s face theory, this study investigated the politeness strategies in public Chinese QQ chat groups where most of the interlocutors were anonymous with high social distance. Politeness strategies in public Chinese QQ chat groups include positive politeness strategy, negative politeness strategy, bald-on-record and off-record strategy.
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