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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.
Jianmin Shi,Klaus-Dieter Becker 한국세라믹학회 2010 한국세라믹학회지 Vol.47 No.1
The kinetics of cation reequilibration have been studied theoretically and experimentally in complex oxides after an external perturbation of equilibrium by temperature jumps. A general kinetic model for cation redistribution amongst non-equivalent sites in complex oxides is derived based on a local homogeneous point defect mechanism involving cation vacancies. Temperature-jump optical relaxation spectroscopy has been established to investigate cation kinetic processes in spinels and olivines. The kinetic model satisfactorily describes the experimental absorbance relaxation kinetics in cobalt containing olivines and in nickel containing spinels. It is found that the kinetics of cation redistribution in complex oxides shows a strong temperature- and compositiondependence. Activation energies for cation redistribution in Co-Mg olivines are found to range between 200 and 220 kJ/mol whereas an energy barrier of about 230 kJ/mol is observed in the case of nickel gallate spinel.
Jianmin Wang,Fengqiu Liu,Sitian Qin 제어·로봇·시스템학회 2021 International Journal of Control, Automation, and Vol.19 No.6
A periodically intermittent control is considered for the memristor-based recurrent neural networks with disturbance and mixed time delays. The purpose of this study is to design the controller with less constraints, which is convenient for successful applications of memristor-based recurrent neural networks in complex environment. First, the estimate of the disturbance and mixed time delay are given by the assumptions. Then, by the method of Lyapunov-Krasovski functional, two new criteria ensuring globally exponential stabilization of the neural network are obtained under the controller, respectively. The proposed theoretical results indicate that the control width and control period are not constrained except that the control width has an upper bound. Furthermore, the design algorithm of controller is described. Finally, two examples are performed through four neural networks to illustrate the effectiveness of the proposed results.