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A Hybrid Key Establishment Scheme for Wireless Sensor Networks
Jianmin Zhang,Qingmin Cui,Rui Yang 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.2
To establish pairwise keys for each pair of neighboring sensor nodes is a basic service, forming the basis other security services, such as authentication and encrypted in wireless sensor networks (WSNs). However, due to constrained energy, memory, and computational capabilities of sensor nodes to establish the pairwise key is challenging task. Here, a combination of polynomial pool-based and the probabilistic key predistribution scheme for WSN is presented. In the proposed scheme part of sensor nodes are pre-loaded polynomial shares, and the polynomial shares are used to compute the keys which make up a key pool. And the rest of sensor nodes are preloaded the keys selected from this key pool. The proposed scheme is analyzed based on connectivity, resistance against attacks, memory consumption and communication overhead. And the simulation results show that the proposed scheme performs better in terms of network resilience to node capture compared to the existing schemes.
Effects of methane concentration on hydrocarbon release during the pyrolysis of coal
Jianmin Zhang,Suoya,Hui Lian,Meishan Gao 한국화학공학회 2007 Korean Journal of Chemical Engineering Vol.24 No.2
weight-loss characteristics of Longkou lignite were studied by means of thermogravimetric analysisin methane ambience. Pyrolysis experiments of the sample coal in diferent concentrations of methane were carriedout on a tube reactor to study the characteristics of hydrocarbon released. The results show that methane can promotethe pyrolysis of lignite in a certain temperature range and the coal can also improve the pyrolysis of methane further.The influence of methane concentration on hydrocarbon release during the pyrolysis of coal is obvious. The hydrocar-bon released from the pyrolysis of lignite is intensive within the temperature range from 400oC to 50oC and thethat the release of C2, C3 and C4 has a close relationship with methane pyrolysis and proves that a synergistic effectdoes exist between the coal and methane.
Co-pyrolysis characteristics of coal and natural gas
Jianmin Zhang,Lirong Kang,Hui Lian,Ming Luo 한국화학공학회 2007 Korean Journal of Chemical Engineering Vol.24 No.3
co-pyrolysis experiment of coal and natural gas was investigated on a fixed-bed reactor. SEM was usedto study the structure changes of the exterior surface of char prepared in this co-pyrolysis experiment, while GC wasalso utilized to analyze the associated gas. The result showed that, with increasing temperature, the coal char tendedto agglomerate. GC and SEM results show that the CH4 decomposition on the exterior surface of char was turned tofilamentous char and extended around like coral. It was also proved that the co-pyrolysis of coal and natural gas pro-moted syngas production. A synergistic effect of coal and natural gas does exist during this process.
A Critical Role of OsMADS1 in the Development of the Body of the Palea in Rice
Jianmin Wan,Wenwei Zhang,Jie Zhang,Yue Cai,Haigang Yan,Jie Jin,Xiaoman You,Liang Wang,Fei Kong,Ming Zheng,Guoxiang Wang,Ling Jiang 한국식물학회 2018 Journal of Plant Biology Vol.61 No.1
OsMADS1 plays crucial roles in the specification of floral organ identity and the determinacy of floral meristem in rice (Oryza sativa). Here we isolated a rice mutant cy15 with defective spikelets. Map-based cloning identified cy15 as a novel mutation in the C terminus of OsMADS1. Severe cy15 spikelets contained normal inner whorl organs but defective paleas, opposite to four abnormal whorls of Osmads1 flowers reported previously. In the cy15 spikelets, the size of the body was remarkably reduced in paleas, indicating a critical role of OsMADS1 in its differentiation. Moreover, the development of palea was impaired in the early stage of the cy15 spikelets. The sub-subcellular location of the mutant OsMADS1 was also affected in cy15. On the other hand, the truncated C terminus of the mutant OsMADS1 from cy15 still showed a significant transcriptional activator function. Meanwhile, though the mutant OsMADS1 retained intact M, I and K domains, its interactions with two highly homologous A-class proteins, OsMADS15 or OsMADS14, were weakened or abolished. Our data suggested that the C-terminal sequence of OsMADS1 might be required for maintaining normal morphology of spikelets in rice.
An Efficient Key Predistribution Protocol for Wireless Sensor Networks via Combinatorial Design
Jianmin Zhang,Xuerui Wang,Jian Li 보안공학연구지원센터 2015 International Journal of Security and Its Applicat Vol.9 No.6
As Wireless Sensor Networks (WSNs) are usually deployed in remote or even hostile environment, the adoption of security mechanism is fundamental. To achieve secure communication between sensor nodes in WSNs, it is important to establish efficient key predistribution schemes. Unfortunately, key management scheme is a challenging issue for WSNs because of the resource limitations in the sensor nodes. In this paper, we propose an efficient key management scheme for WSNs, which assigns the key spaces to sensor nodes via combinatorial design. In the scheme Finite Projective Plane is mapped to obtain efficient key distribution scheme. Connectivity, resistance against attacks, storage and communication overhead are studied analytically and computationally. Compared to related schemes, the proposed scheme performs better against compromised node attacks.
An Improved CPE Localization Algorithm for Wireless Sensor Networks
Jianmin Zhang,Hua Li,Jian Li 보안공학연구지원센터 2015 International Journal of Future Generation Communi Vol.8 No.1
Localization is increasingly becoming the focus of research in the filed of Wireless Sensor Networks (WSNs), as the data reported from a sensor is only useful when the position of that sensor is found. In this paper, we proposed an improved CPE (Convex Position Estimation) localization algorithm that reduces the localization error without requiring additional hardware and computational costs. In the proposed scheme, we first estimate the location of sensor nodes using Convex Position Estimation (CPE), and then refine the location of sensor nodes using the location of the two-hop anchor nodes. The simulation results show that the new localization algorithm effectively improves the positioning accuracy compared with the traditional CEP localization algorithms.
A Load Balancing Multi-path Secure Routing Scheme for Wireless Sensor Networks
Jianmin Zhang,Hao Li,Qingmin Cui 보안공학연구지원센터 2015 International Journal of Grid and Distributed Comp Vol.8 No.6
Lifetime optimization and security are two important design issues for WSNs with non-replenishable energy resources. Routing protocols in wireless sensor networks (WSNs) are susceptible to a number of attacks depending on the nature of the protocol, its application, and the environment in which the protocol is intended to be used. Routing protocols that do not take the malicious attacks into account can not be easily temper proofed. The longevity of WSNs is a crucial concern that significantly influences their applicability in a specific context. In this paper, we present a Load Balancing Multi-path Secure Routing (LBMSR) protocol to address these two issues concurrently through balanced energy consumption and one-way hash key chain and symmetric key cryptography. LBMSR is designed with two configurable parameters, load balance control and security level. Load balance is used to avoid the problem of energy consuming imbalance and the formation of energy holes. Security level is designed to determine the probabilistic distribution of the random walking that provides routing security. Simulation results and security analyses show that the proposed algorithm can provide excellent balance between routing efficiency and energy consumption while preventing routing attacks.
An Improved DV-Hop Localization Algorithm Based on the Node Deployment in Wireless Sensor Networks
Jianmin Zhang,Ning Guo,Jian Li 보안공학연구지원센터 2015 International Journal of Smart Home Vol.9 No.10
Localization algorithm is an important and challenging topic in Wireless Sensor Networks (WSNs), especially for the applications requiring the accurate position of the sensed information. In this paper, an improved DV-Hop algorithm based on the node deployment was proposed. The proposed algorithm improves the localization accuracy by taking the advantage of the node deployment when computing the distance between the unknown node and the anchor. Simulation results prove that the improved DV-Hop algorithm offers the better performance compared to the original DV-Hop algorithm in localization accuracy without requiring additional hardware.