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cnrri Inaugurated in Hangzhou

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Chinese Rice Research Newsletter 1990年第1期 8-8页

作者： wang kaizhi cnrri

The Inauguration Ceremony of ChinaNational Rice Research Institute(cnrri)and a rice research conference were held 9-11October,1989 in Hangzhou,*** Kang,Minister of Agriculture,*** Zemin,Party Secretary of ZhejiangProvince,and *** Lampe,DirectorGeneral of IRRI cut the ribbon at the *** 400 distinguished ricescientists from home and abroad were *** the conference,36 experts

关键词： cnrri Inaugurated in Hangzhou

Successfully introduce maize DNA fragments into rice

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Chinese Rice Research Newsletter 1994年第3期2卷 11-11页

作者： wang kaizhi,cnrri

The maize DNA fragments was successfully incorporated into rice by Associate Prof WAN Wenju’s research team at Hunan Agricultural College, Changsha, China. The new gene transferring rice is named Genetic Engineered Rice (GER) line. The team put dry embryo of rice cultivar Xiangzaoxian 8 in the solution containing maize DNA using a modified method of embryo soaking to introduce the exotic DNA into the rice embryo. By selections through successive generation, promising rice lines were finally developed from progenies having required variations. DNA molecular test showed that the lines have already got some maize DNA fragments. The line GER-1 is of the most productive among the new rice lines. It has strong tillering ability and large sized panicles with an average number of 200 grains per panicle and 80% seed-setting rate. It gives a

关键词： DNA Successfully introduce maize DNA fragments into rice line

An early maturing rice variety of high quality—Zhefu 218

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Chinese Rice Research Newsletter 1994年第2期2卷 12-12页

作者： wang kaizhi,cnrri

Early maturing rice variety of high quality "Zhefu 218" was developed by prof XIA Yingwu, Zhejiang Agricultural University, Hangzhou, China. The growth period of the new rice variety is 106 d and its average yield is about 5.25-7.08 t / ha. It has the speciality of early-maturing combined with good quality. Not only the grains of "Zhefu 218" are of excellent cooking, but also of nutritive quality. The flavour of the cooked rice of"Zhefu 218" is considerably better than those of the ordinary rice cultivars here.

关键词： high An early maturing rice variety of high quality

Zhe9248—a new scented rice line cames out in Zhejiang

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Chinese Rice Research Newsletter 1994年第2期2卷 11-11页

作者： wang kaizhi,cnrri

This novel rice line is developed recently’by a research team led by Associate Prof QIU Baiqin, Crop Breeding and Cultivation Institute, Zhejiang Academy of Agricultural Sciences. Zhe 9248 is of high resistance to blast, early mature and of higher yield. Being soft, smooth, and glossy, the cooked rice of "Zhe 9248" has excellent eating quality. The kernels of "Zhe 9248" are hardened to such a degree that they could be capa-

关键词： line Zhe9248 a new scented rice line cames out in Zhejiang

Inducing fertility restoration in the genic male sterile line of rice with chemical regulators

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Chinese Rice Research Newsletter 1994年第3期2卷 11-11页

作者： wang kaizhi,cnrri

For the first time, the fertility of rice genic male sterile line was partially restored with the application of chemical regulators at Hainan Rice Breeding Nursery on Mar 1993. A single panicle of the rice plant could bear as many as 27 grains. The chemical agent that could modulate the growth of the rice plants of genic male sterile line was developed by Prof ZHOU Guangqia and his colleagues at the Biology Institute, Hunan Teachers University, China.

关键词： line Inducing fertility restoration in the genic male sterile line of rice with chemical regulators

Exponential Convergence to Time-Periodic Viscosity Solutions in Time-Periodic Hamilton-Jacobi Equations

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Chinese Annals of Mathematics,Series B 2018年第1期39卷 69-82页

作者： kaizhi wang School of Mathematical Sciences Shanghai Jiao Tong University

Consider the Cauchy problem of a time-periodic Hamilton-Jacobi equation on a closed manifold,where the Hamiltonian satisfies the condition:The Aubry set of the corresponding Hamiltonian system consists of one hyperbolic 1-periodic *** is proved that the unique viscosity solution of Cauchy problem converges exponentially fast to a1-periodic viscosity solution of the Hamilton-Jacobi equation as the time tends to infinity.

关键词： Hamilton-Jacobi equations Viscosity solutions Weak KAM theory

Secure Spectral-Energy Efficiency Tradeoff in RandomCognitive Relay Networks

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China Communications 2017年第12期14卷 45-58页

作者： Bing wang kaizhi Huang Xiaoming Xu Yi wang National Digital Switching System Engineering and Technological Research Center Zhengzhou 450002 China School of Electronics and Communication Engineering Zhengzhou University of Aeronautics Zhengzhou 450046 China

Spectral efficiency(SE) and energy efficiency(EE) in secure communications is of primary importance due to the fact that 5 G wireless networks aim to achieve high throughput,low power consumption and high level of ***,maximizing SE and EE are not achievable *** this paper,we investigate the SE and EE tradeoff for secure transmission in cognitive relay networks where all nodes are randomly *** first introduce the opportunistic relay selection policy,where each primary transmitter communicates with the primary receiver with the help of a secondary user as a ***,we evaluate the secure SE and secure EE of the primary network based on the outage probabilities ***,by applying a unified SE-EE tradeoff metric,the secure SE and EE tradeoff problem is formulated as the joint secure SE and EE maximization *** the non-concave feature of the objective function,an iterative algorithm is proposed to improve secure SE and EE *** results show that the opportunistic relay selection policy is always superior to random relay selection ***,the opportunistic relay selection policy outperforms conventional direct transmission policy when faced with small security threat(i.e.,for smaller eavesdropper density).

关键词： physical layer security cognitiverelay networks secure spectral efficiency secure energy efficiency spectral-energy effi-ciency tradeoff

A Physical Layer Authentication Mechanism for IoT Devices

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China Communications 2022年第5期19卷 129-140页

作者： Xinglu Li kaizhi Huang Shaoyu wang Xiaoming Xu PLA Strategic Support Force Information Engineering University Zhengzhou 450001China

When Internet of Things(IoT)nodes access the network through wireless channels,the network is vulnerable to spoofing attacks and the Sybil ***,the connection of massive devices in IoT makes it difficult to manage and distribute keys,thus limiting the application of traditional high-level authentication *** with the high-level authentication scheme,the physical layer authentication scheme realizes the lightweight authentication of users by comparing the wireless channel characteristics of adjacent ***,traditional physical layer authentication schemes still adopt the one-to-one authentication method,which will consume numerous network resources in the face of large-scale IoT node access *** order to realize the secure access authentication of IoT nodes and regional intrusion detection with low resource consumption,we propose a physical layer authentication mechanism based on convolution neural network(CNN),which uses the deep characteristics of channel state information(CSI)to identify sending nodes in different ***,we obtain the instantaneous CSI data of IoT sending nodes at different locations in the pre-set area,and then feed them into CNN for training to procure a model for IoT node *** its powerful ability of data analysis and feature extraction,CNN can extract deep Spatio-temporal environment features of CSI data and bind them with node ***,an authentication mechanism which can distinguish the identity types of IoT nodes located in different positions is established to authenticate the identity of unknown nodes when they break into the pre-set *** results show that this authentication mechanism can still achieve 94.7%authentication accuracy in the case of a low signalto-noise ratio(SNR)of 0 dB,which means a significant improvement in authentication accuracy and robustness.

关键词： IoT CSI CNN access authentication intrusion detection

Energy Efficiency Analysis of Cellular Networks with Cooperative Relays via Stochastic Geometry

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China Communications 2015年第9期12卷 112-121页

作者： Zhang Zhiwei Li Yunzhou Huang kaizhi Zhou Shidong wang Jing State Key Laboratory on Microwave and Digital Communications Tsinghua National Laboratory for Information Science and Technology Tsinghua University China National Digital Switching System Engineering and Technological R&D Center

Cooperative relaying is a promising technology that can improve the spectral and energy efficiency of cellular networks. However, the deployed relays consume a lot of energy and system resources. To improve the energy efficiency of the relay-assisted cellular networks, this paper considers the use of energy harvesting(EH) on relay nodes. A random sleeping strategy is also introduced in macro base stations(MBS) as a possible method to reduce energy consumption. In this paper, an analytical model is proposed to investigate the energy efficiency of cellular networks with EH relays and sleep mode strategy. Numerical results confirm a significant energy efficiency gain of the proposed networks comparing to the cellular networks with non-EH relays and MBSs without sleep mode strategy. The effects of the density and transmit power of MBSs on energy efficiency are also given through simulations.

关键词： cooperative relay energy efficiency stochastic geometry energy harvesting