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Self-healing group key distribution scheme based on enhanced dual directional hash chains
基于增强型双向散列链的自愈组密钥分发方案

QIN Rong-hu,HE Liang-ming,YANG Xu,YUAN Xiao-bing,<br>荣华,何亮明,杨 旭,袁晓兵
计算机应用研究 , 2012,
Abstract: The conventional dual directional hash chains based self-healing group key distribution schemes are vulnerable to the collusion attack. To overcome the problem, this paper introduced EDDHC, which consisted of a slide window and a light weight sub-chain LiBHC. The paper also used EDDHC to design the group key distribution scheme. The proposed scheme enabled the seamless switching of the group key in used and the greater reduction of security vulnerability to the collusion attack. The analysis illustrates that the scheme maintains low resource overhead while achieving better reliability and security performance.
Key Distribution Scheme in Designated Manually Deployed Wireless Sensor Networks Based on One-way Hash Chain
基于单向散列链的定点布设无线传感器网络密钥分配方案

QIN Rong-hua,HE Liang-ming,LI Bao-qing,YUAN Xiao-bing,<br>荣华,何亮明,李宝清,袁晓兵
计算机科学 , 2013,
Abstract: Aiming at the case of manually deployed wireless sensor networks(WSNs) , we introduced a key distribution scheme based on one-way hash chain. By employing the mechanism of key chain partly activation,our scheme can effectively weaken the threat of node capture, be resilience against node replication or node forgery. Besides of good security properties, the scheme supports node redeployment and promises good network coverage rate.
基于单向散列链的定点布设无线传感器网络密钥分配方案
荣华,何亮明,李宝清,袁晓兵?
计算机科学 , 2013,
Abstract: 针对有重部署需求的定点布设无线传感器网络,提出基于单向散列链、支持身份认证的密钥分配方案。方案采用密钥链分段激活方式,可以有效抵制节点俘获攻击造成的安全威胁,安全性能好;支持节点重部署,从而可以保障有良好的网络覆盖率。
THE SINGLE ZIRCON U-Pb DATING METHOD
微量及颗粒锆石U-Pb定年方法

Xu Ronghua,<br>许荣华
岩石学报 , 1989,
Abstract: This paper reported the influence factors on single zircon crystal dating:the interference of T1 and Ba, the discrimination of mass, and the memory effect of U. The U blank testing for a long time indicates that the TEFLON bombs,treated with concentrated HP and aqua regia, possess the memory effect of U, Which could be eliminated by cleaning with dilute HBr. Finally its geological significance is illustrated in the paper.
AN AUTHENTICATION-DOUBLED ACCESS CONTROL SCHEME BASED ON ONE-WAY FUNCTION
一种基于单向函数的双重认证存取控制方案

Shi Ronghua,<br>施荣华
电子与信息学报 , 1997,
Abstract: Based on a one-way function, this paper proposed an authentication-doubled access control scheme for information protection system. The scheme is safer than the previously proposed schemes. In the scheme, the user's secret key is used not only for computing the corresponding access privilege to the intended file, but also for authenticating the requesting user not to illegitimately access the protected file. The scheme can perform the access control in dynamic environments, such as change access priviledges and insert/delete users or files. Beside, the scheme is simple to establish.
Simulation of Seasonal Variations in the Tropical Pacific Ocean
热带太平洋环流季节变化的数值模拟

Zhang Ronghua,<br>张荣华
大气科学 , 1994,
Abstract: 在观测到的海表风应力和热量及淡水通量驱动下,用大气物理研究所发展的高分辨率自由表面热带太平洋环流模式对热带太平洋环流季节变化进行了数值模拟。对模拟得到的热带太平洋海面起伏、温度场和流场等季节变化分析、比较表明,模式成功地模拟了观测到的环流季节变化基本特征。其中,海面起伏中西北太平洋副热带反气旋环流在冬季最强,赤道槽在冬季和早春季强,而赤道脊和北赤道逆流槽则在秋季强;北赤道逆流在秋季强而春季弱,150°W附近区域赤道表层洋流流向在4至7月逆转;赤道东太平洋地区海表温度场春季增暖和秋冷却;以及次表层赤道斜温层
A Barotropic-Baroclinic Mode-Splitting Algorithm in the Free Surface Oceanic General Circulation Model
自由表面海洋环流模式的正、斜压模分解算法

Zhang Ronghua,<br>张荣华
大气科学 , 1994,
Abstract: An oceanic general circulation model develoPed at the Institute of AtmoSPheric Physics (IAP oGCM) is free from the rigid-lid upper boundary condition but free surfaee is incorporated so that the model Permits the explicit treatment of sea level as a prognostic variable. In order to reduce the comput-er time, some stable and efficient time integration schemes have been developed. In this paper, a barotropic-baroclinic mode-splitting algorithm for such free surface OGCM is presented. It is shown that the computational efficiency can be increased several times by splitting the adjustment process fur-ther into the barotropic mode associated with sea surface elevation and baroclinic ones with inhomogcneous distribution of sea water density, and by numerically integrating these barotropic and baroclinic modes, respectively, with different time steps or different schemes. Experiment results are given to show its practicality and to quantitatively compare the computational efficienCy in time integration.
The bistable state of a nematic liquid crystal cell with surface order-electricity polarization and flexoelectric polarization at saturation point
表面序电极化、挠曲电极化与向列液晶盒饱和点的双稳态

Guan Rong-Hua,<br>关荣华
物理学报 , 2011,
Abstract: Using both numerical simulations and an analytical theory we study the influence of the surface order-electricity polarization and flexoelectric polarization on the bistable state of a non-xymmetric weak anchoring nematic liquid crystal cell at saturation point.The equilibrium equation and boundary condition of the director have been obtained when surface order-electricity polarization and flexoelectric polarization coexistence. By adopting a new state parameter, the physical effects caused by the two polarizations have been discussed from the energy point of view. The results show that the bistable state can be induced under certain condition and by changing the anchoring energy at saturation point. The condition for the bistable state existence is deduced and it accord well with the numerical results.
Multi-Wavelength Laser Atmospheric Extinction Correlativity and Real-time Inversion Computation Study
多波长激光的大气消光系数相关性及实时反演计算研究

WU Rong-hua,<br>吴荣华
红外与毫米波学报 , 2009,
Abstract: The correlativity of extinction coefficients at different wavelengths was get by Mie scattering theory and the laser multipoint fault measuring techniques. The extinction coefficient at the wavelength of 1.06um was measured with the laser remote sensing back scattering hazemeter produced by ourselves. Then the extinction coefficients at the wavelength of 0.532um, 0.86um, 1.57um and 3.47um were inversely calculated real-timely with the correlativity of extinction coefficients at different wavelengths and were compared with the practical extinction coefficient at the wavelength of 0.532um. The results showed that it is feasible to inversely calculate the infrared atmospheric propagation and establish the infrared radiation real-time atmospheric propagation correcting model with the correlativity of extinction coefficients at different wavelengths.
A Secure Authentication Access Control Scheme Based on Digital Signature
基于数字签名的安全认证存取控制方案

SHI Rong-hua,<br>施荣华
软件学报 , 2002,
Abstract: 基于Harn数字签名方案和零知识证明,针对信息保护系统构造了一种认证存取控制方案.该方案与已有的存取控制方案相比要更加安全.因为在该方案中,用户与系统不必暴露秘密信息就可以进行双向认证,并且其共享密钥可用于认证用户访问保密文件的请求合法权限.该方案能够在动态环境中执行像改变存取权限和插入/删除用户或文件这样的存取操作,而不影响任何用户的保密密钥.
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