雀儿山隧道海拔高度系数测试研究

以拟建的国道317线的雀儿山隧道为依托,对海拔400~5000 m处考虑烟雾的海拔高度系数进行了现场测试,根据取得的实测数据,探索出海拔高度大于2400 m的海拔高度系数的合理取值,从而提出雀儿山隧道海拔高度系数的建议取值,为隧道通风方案设计提供了参考依据,同时也是对现有公路隧道通风规范的补充与验证。     

改性沥青SMA混合料的应用研究

SMA路面以其优良的路用性能,正日益得到广泛应用。该文通过SMA沥青路面在杭州市的首次应用,论述SMA沥青混合料组成与施工要点。     

SMA在高温多雨地区路面工程中的应用研究

根据深圳地处高温多雨地区的气候特点,结合滨海大道沥青路面工程的施工,系统研究了沥青玛蹄脂碎石混合料的石料选择、配合比设计的标准和方法,及SMA的生产和施工工艺,提出了高温多雨地区SMA的级配范围及技术指标.     

ControlNet技术在FFU系统中的应用

介绍了ControlNet总线技术特点，并将其应用到FFU（风机过滤器单元）系统的控制网络中。实践表明，在FFU系统采用ControlNet总线控制技术，不仅提高了超净室环境参数的控制精度，还明显提高了FFU系统的可靠性和安全性。     

基于NTRU公钥算法的安全OSPF协议研究

OSPF是一种典型的链路状态路由协议,是当前局域网中最常用的路由协议之一.文中简要介绍了OSPF协议的网络安全需求,提出了新的安全OSPF路由协议SOSPF,其中使用加密速度更快的公钥加密算法NTRU来实现OSPF协议的数字签名.采用NS-2平台对其进行仿真,并进行性能和安全性分析.     

MRP和LRP的表达与食管鳞癌临床病理特征的关系

目的探讨多药耐药相关蛋白(MRP)和肺耐药蛋白(LRP)在食管鳞癌组织中的表达及其与临床病理特征和预后的关系。方法应用Elivision二步免疫组织化学法观察51例食管鳞癌组织和18例癌旁正常黏膜组织(距离癌组织>2cm)中MRP和LRP的表达情况。结果食管鳞癌肿瘤大小在5cm以上者LRP阳性表达率显著高于5cm以下者(P<0.05)。癌组织中MRP和LRP阳性率高于癌旁正常组织,有淋巴结转移者MRP和LRP阳性率高于无淋巴结转移者,MRP和LRP阳性者术后3年生存率低于阴性者,但其差异均无统计学意义。MRP和LRP的表达与患者年龄、肿瘤分化程度、浸润深度、临床分期无统计学相关性。MRP和LRP间无显著性相关。结论MRP和LRP不能作为临床判断食管鳞癌恶性程度、是否转移和预测预后的独立指标,但可提示这些蛋白阳性的患者存在易转移和预后差的趋势。     

Multimodal Evolution Approach to Multidimensional Intrusion Detection

An artificial immunity based multimodal evolution algorithm is developed to generate detectors with variable coverage for multidimensional intrusion detection. In this algorithm, a proper fitness function is used to drive the detectors to fill in those detection holes close to self set or among self spheres, and genetic algorithm is adopted to reduce the negative effects that different distribution of self imposes on the detector generating process. The validity of the algorithm is tested with spherical and rectangular detectors, respectively, and experiments performed on two real data sets （machine learning database and DAPRA99） indicate that the proposed algorithm can obtain good results on spherical detectors, and that its performances in detection rate, false alarm rate, stabih＇ty, time cost, and adaptability to incomplete training set on spherical detectors are all better than on rectangular ones.     

Parallel Key-insulated Signature： Framework and Construction

To deal with the key-exposure problem in signature systems, a new framework named parallel key-insulated signature （PKIS） was introduced, and a concrete PKIS scheme was proposed. Compared with traditional key-insulated signature （KIS） schemes, the proposed PKIS scheme allows a frequent updating for temporary secret keys without increasing the risk of helper key-exposure. Moreover, the proposed PKIS scheme does not collapse even if some （not all） of the helper keys and some of the temporary secret keys are simultaneously exposed. As a result, the security of the PKIS scheme is greatly enhanced, and the damage caused by key-exposure is successfully minimized.     

On constructing certificateless proxy signature from certificateless signature

In proxy signature schemes, an original signer A delegates its signing capability to a proxy signer B, in such a way that B can sign message on behalf of A.The recipient of the final message verifies at the same time that B computes the signature and that A has delegated its signing capability to B.Recently many identity-based(ID-based) proxy signature schemes have been proposed, however, the problem of key escrow is inherent in this setting.Certificateless cryptography can overcome the key escrow problem.In this paper, we present a general security model for certificateless proxy signature scheme.Then, we give a method to construct a secure certificateless proxy scheme from a secure certificateless signature scheme, and prove that the security of the construction can be reduced to the security of the original certificateless signature scheme.     

基于EEMD-TEO熵的高速列车轴承故障诊断方法

为了解决高速列车轴承早期故障中低频信号的类间分离性较弱、保持架故障难以识别等的问题,提出了基于Teager能量算子（Teager energy operator,TEO）聚合经验模态分解（ensemble empirical mode decomposition,EEMD）熵的自适应诊断方法.该方法将EEMD、样本熵、TEO相结合,利用EEMD的自适应性得到固有模态（intrinic mode function,IMF）信号,用改进的TEO从IMF中提取得到样本熵,使用支持向量机（support vector machine,SVM）判断轴承工作状态与故障类型;讨论了EEMD能量熵、EEMD奇异值熵、EEMD-TEO时频熵生成的故障特征向量以及该向量在SVM中识别结果;对正常轴承、保持架故障、滚动体故障3种状态的轴承样本数据进行了故障诊断.研究结果表明:对3种轴承的故障识别率可以达到98%,较传统的经验模态熵识别率提高了2.6%,该方法可用作高速列车轴承状态诊断.