大黄蟅虫丸对血淤证动物微循环的影响

在血淤证动物上研究了大黄　虫丸对其微循环的影响。结果发现，大黄　虫丸可明显减少白血细胞聚集和附壁，增加毛细血管口径及其开放数，并使毛细血管血液流态、流速改善；同时使血淤症动物全血及血浆比粘降低；腹主动脉壁伊文斯蓝含量减少。并且增加了正常小鼠和垂体后叶素诱发的心肌缺血小鼠的心肌营养血流量。说明大黄　虫丸有明显的改善微循环、降低血管壁通透性和抗心肌缺血作用，具有重要的临床意义。     

Improved preimage attack on 3-pass HAVAL

HAVAL is a hash function proposed by Zheng et al. in 1992, including 3-, 4- and 5-pass versions. We improve pseudo-preimage and preimage attacks on 3-pass HAVAL at the complexity of 2¹⁷² and 2^209.6, respectively, as compared to the previous best known results: 2¹⁹² and 2²²⁵ by Sasaki et al. in 2008. We extend the skip interval for partial-patching and apply the initial structure technique to find the better message chunks, and combine the indirect-partial-matching, partial-fixing and multi-neutral-word partial-fixing techniques to improve the attacks based on the meet-in-the-middle method. These are the best pseudo-preimage and preimage attacks on 3-pass HAVAL.     

Can the Polynomial Based Key Predistribution Scheme Be Used Many Times in One Wireless Sensor Network Key Establishment Protocol？

Key establishment is the basic step for the wireless sensor network (WSN) security. The polynomial based key predistribution scheme of Blom and Blundo et al. has been the basic ingredient for the key establishment for WSNs. It is tempting to use many random and different instances of polynomial based key predistribution scheme for various parts of the WSN to enhance the efficiency of WSN key establishment protocols. This paper indicates that it is not secured in general to use many instances of Blom-Blundo et al. polynomial based key predistribution scheme in a WSN key establishment protocol. Thus the previously constructed group-based type WSN key predistribution schemes using polynomial based key predistribution scheme are insecure. We propose new generalized Blom-Blundo et al. key predistribution schemes. These new generalized Blom-Blundo et al. key predistribution schemes can be used many times in one WSN key establishment protocol with only a small increase of cost. The application to group-based WSN key predistribution schemes is given.     

GCr15钢圈模具断裂失效分析

从冷加工质量、材料组织性能、服役条件与断裂特征等方面分析了GCr15钢圈成型模具早期断裂失效的原因，不同模具中分别存在的网状碳化物、粗大马氏体组织、回火不足等热加工缺陷以及过渡圆角尖锐等冷加工缺陷。模具断裂失效是冷、热加工缺陷综合作用造成的。     

GCr15钢圈模具断裂失效分析

从冷加工质量、材料组织性能、服役条件与断裂特征等方面分析了GCr15钢圈成型模具早期断裂失效的原因．不同模具中分别存在网状碳化物、粗大马氏体组织、回火不足等热加工缺陷以及过渡圆角尖锐等冷加工缺陷．模具断裂失效是冷、热加工缺陷综合作用造成的．     

ID-Based Authenticated Dynamic Group Key Agreement

IntroductionIn many modern collaborative and distributedapplications such as multicast communication, au-dio-video conference and collaborative tools, scal-able and reliable group communication is one of thecritical problems. A group key agreement (GKA)protocol allows a group of users to share a key,which may later be used to achieve some crypto-graphic goals. In addition to this basic tool an au-thentication mechanism provides an assurance ofkey shared with intended users. A protocol achiev…     

混响背景下基于自动删除算法的最小选择恒虚警检测器

针对Barnard等人提出的非高斯混响背景下的恒虚警检测器在非均匀环境中性能下降的缺点,将基于自动删除算法的最小选择恒虚警检测方法运用于其检测器结构中,提出了非高斯混响背景下基于自动删除算法的最小选择恒虚警检测器.该方法可以自动删除参考单元中的干扰点,从而可以克服Barnard等人提出的方法存在的缺点.推导出了该检测器的平均虚警概率和平均检测概率.最后通过对仿真数据和试验数据的处理结果验证了该检测器的优越性.     

One construction of chameleon all-but-one trapdoor functions

Chameleon all-but-one trapdoor functions （ABO-TDFs） were introduced by Lai et al. An important component of the existing constructions of chameleon ABO-TDFs based on the decisional Diffie-Hellman （DDH） assumption was the chameleon hash functions. In this paper, we instantiate the first chameleon ABO-TDFs based on DDH free of chameleon hash functions.     

On the security of multivariate hash functions

Multivariate hash functions are a type of hash functions whose compression function is explicitly defined as a sequence of multivariate equations. Billet et al designed the hash function MQ-HASH and Ding et al proposed a similar construction. In this paper, we analyze the security of multivariate hash functions and conclude that low degree multivariate functions such as MQ-HASH are neither pseudo-random nor unpredictable. There may be trivial collisions and fixed point attacks if the parameters of the compression ftmction have been chosen. And they are also not computation-resistance, which makes MAC forgery easily.     

缫丝厂工人职业性皮肤病及其防治——宝鸡丝厂调查报告

本文报告了调查陕西宝鸡丝厂工人职业性皮肤病的发病情况,主要是立缫车间工人手部的急慢性皮炎。作者认为其发病原因主要是于长时间频繁地接触热的偏硷性缫丝水和水中所含的某些有机物质或霉菌的分解产物所引起的炎性反应。针对这一原因,作者提出了应用氧化锌软膏防水,明矾水和滑石粉脱水,吸水,水杨酸软膏防治漫性皮炎等防治方法,取得了一定效果。此外,作者还测定了发病工人的血清微量元素、宏量元素和维生素A.E值,发现发病工人的血清中铜,铜兰蛋白、钙、镁及维生素A.E值均有所降低,铁值增高,锌值无改变,其原因尚有待进一步研究,适当注意膳食中对此等物质的补充,可能是有益的。     

七种因素对NCS性能的影响

在建立NCS仿真系统的基础上，用TrueTime工具箱，分析了时延、扰动、丢包率、采样周期等不确定性因素以及网络通信模式、调度算法等对NCS性能的影响，实现了对网络控制系统的实时仿真，给出了仿真结果和相关结论，从仿真结果可以看出TrueTime工具箱对网络控制系统的实时仿真的有效性，对深入理解和研究NCS有一定的帮助．     

再生水泥混凝土界面过渡区的结构特性分析

借助于扫描电镜和电子能谱仪,对再生水泥混凝土的微观形貌和结构进行了观察,分析了再生水泥混凝土内部各种界面的结构特性以及Ca、Si等元素在界面过渡区的分布特征。结果表明:再生水泥混凝土内部由多种界面结构组成,各界面过渡区的厚度差异较大。界面过渡区内外的元素分布规律存在着较大的差异,Ca、Si等元素在界面过渡区内出现了一定程度的聚集,在界面过渡区外的分布则较为连续。     

从钼矿克山病区看钼与克山病区的关系

1.小麦、玉米中钼含量以病区华县金堆公社钼矿区最高,其他病区与非病区的麦子无显著差异,而玉米中钼含量其他病区也高于非病区。2.头发钼含量,仍以华县金堆公社钼矿区为最高,其他病区和非病区无差别。3.根据我们已作的工作,克山病的病因不是外源性钼缺乏。     

Research on Web Page Automatic Classification Based on Internet News Corpus

Web pages contain more abundant contents than pure text ,such as hyperlinks,html tags and metadata et al.So that Web page categorization is different from pure text. According to Internet Chinese news pages, a practical algorithm for extracting subject concepts from web page without thesaurus was proposed, when incorporated these category-subject concepts into knowledge base, Web pages was classified by hybrid algorithm, with experiment corpus extracting from Xinhua net. Experimental result shows that the categorization performance is improved using Web page feature.     

隧道施工位移量测数据库与位移分析？

本文提出用关系型数据库管理隧道施工位移量测数据,用改进的A.Guenot等提出的一类函数形式作为位移函数,用步长加速法对量测值进行回归分析。所提方法适用于隧道施工现场。     

用静力触探判别饱和砂土液化势的剪应变方法

本文通过标定罐内的静力触探试验和循环应变三轴试验资料的对比,讨沦了用静力 触探估计饱和砂土液化势的剪应变方法,提出了判断砂土液化势的场地剪应变和静 力触探修正贯入阻力之间的相关关系,并同国外有关资料进行了对比,所得结果可供 工程应用参考。      

调节聚焦匹配性对品牌体验和重购意向的影响研究

品牌体验是近年来市场营销领域理论和实践的热点,本研究以Brakus对消费者品牌体验的概念和维度划分为基础,基于调节聚焦理论从消费者和品牌广告信息的调节聚焦匹配类型研究品牌体验和重购意向的形成。研究采用了准实验设计,从消费者购买之后进行检验。结果显示消费者和品牌广告信息的调节聚焦类型匹配时能够产生更高的消费者品牌体验和重购意向,消费者和品牌广告信息的调节聚焦类型对品牌体验各维度和重购意向具有一定的主效应。     

丁苯改性水泥混凝土的试验研究

为了提高水泥混凝土的使用性能,通过室内试验研究了丁苯改性水泥混凝土（PCC）的力学性能、收缩性能和耐久性。研究结果表明：随着丁苯掺量的增加,PCC在抗折强度提高的同时刚度降低,早期收缩性能有所改善,抗渗、耐磨、抗腐蚀等耐久性均有显著提高。     

苏通大桥268 m跨径连续刚构桥施工线形控制

从施工线形控制的总体思路和方法、线形控制计算、施工阶段线形控制方法、主梁线形纠正等方面阐述了苏通大桥268m跨径连续刚构桥的施工线形控制方法,并以实测数据证明了该方法的合理性。     

博尼维沥青混凝土在石黄高速公路中的应用

在沥青混凝土中掺加一定量的短纤维,纤维对沥青混凝土具有改性、加筋和桥联作用,可以大幅度提高沥青混凝土的性能,延长路面的使用寿命。本文介绍了博尼维纤维在国内外的应用情况,通过博尼维沥青混凝土在石黄高速公路中的应用实例,对博尼维纤维的作用机理、使用效果作了说明,并对它进行了效益分析。