GOMSS: A Simple Group Oriented (t,m, n) Multi-secret Sharing Scheme

In most (t,n)-Multi-secret sharing ((t,n)-MSS) schemes, an illegal participant, even without any valid share, may recover secrets when there are over t participants in secret reconstructions. To address this problem, the paper presents the notion of Group ori-ented (t,m,n)-multi-secret sharing (or (t,m,n)-GOMSS), in which recovering each secret requires all m (n ≥ m ≥ t) participants to have valid shares and actually participate in secret reconstruction. As an example, the paper then pro-poses a simple (t,m,n)-GOMSS scheme. In the scheme, every shareholder has only one share; to recover a secret, m shareholders construct a Polynomial-based randomized component (PRC) each with the share to form a tightly coupled group, which forces the secret to be recovered only with all m valid PRCs. As a result, the scheme can thwart the above illegal participant attack. The scheme is simple as well as flexible and does not depend on conventional hard problems or one way functions.     

站街煤矿副井止浆垫的施工工艺

介绍站街煤矿副井在涌水量达60.8m3/h的条件下,注浆止浆垫的施工方法。对类似矿井具有一定的借鉴意义。     

Novel Epoxides of Soloxolone Methyl: An Effect of the Formation of Oxirane Ring and Stereoisomerism on Cytotoxic Profile,Anti-Metastatic and Anti-Inflammatory Activities In Vitro and In Vivo

It is known that epoxide-bearing compounds display pronounced pharmacological activities, and the epoxidation of natural metabolites can be a promising strategy to improve their bioactivity. Here, we report the design, synthesis and evaluation of biological properties of αO-SM and βO-SM, novel epoxides of soloxolone methyl (SM), a cyanoenone-bearing derivative of 18βH-glycyrrhetinic acid. We demonstrated that the replacement of a double-bound within the cyanoenone pharmacophore group of SM with α- and β-epoxide moieties did not abrogate the high antitumor and anti-inflammatory potentials of the triterpenoid. It was found that novel SM epoxides induced the death of tumor cells at low micromolar concentrations (IC₅₀^(24h) = 0.7–4.1 µM) via the induction of mitochondrial-mediated apoptosis, reinforced intracellular accumulation of doxorubicin in B16 melanoma cells, probably by direct interaction with key drug efflux pumps (P-glycoprotein, MRP1, MXR1), and the suppressed pro-metastatic phenotype of B16 cells, effectively inhibiting their metastasis in a murine model. Moreover, αO-SM and βO-SM hampered macrophage functionality in vitro (motility, NO production) and significantly suppressed carrageenan-induced peritonitis in vivo. Furthermore, the effect of the stereoisomerism of SM epoxides on the mentioned bioactivities and toxic profiles of these compounds in vivo were evaluated. Considering the comparable antitumor and anti-inflammatory effects of SM epoxides with SM and reference drugs (dacarbazine, dexamethasone), αO-SM and βO-SM can be considered novel promising antitumor and anti-inflammatory drug candidates.     

超分散剂的作用机理及应用效果

超分散剂的分子结构分为锚固基团与溶剂化链两个部分。锚固基团可通过化学键、氢键及表面增效剂等不同方式紧紧吸附于颜料表面 ,而溶剂化链伸展于介质中并在颜料表面形成足够厚度的吸附层。不同颗粒吸附层之间的排斥能可通过熵斥理论模型或渗透模型来计算。超分散剂独特的作用机理使它具有一系列优异的应用性能。     

横向各向同性介质Thomsen近似公式的适用范围

Thomsen为横向各向同性（TI）介质提出的各向异性参数和线性近似公式被广泛采用,但目前对Thomsen近似公式的适用范围的认识仍很模糊。针对这一问题,研究了TI介质P波和SV波Thomsen近似公式最大相对误差随各向异性参数变化的特征以及近似公式的适用范围。研究结果表明,波速比α0/β0=1．5时,在-0．12≤ε≤0.16且-0.16≤δ≤0.24,或｜ε-δ｜〈0.17（ε和δ为正）时,P波相速度近似公式的最大相对误差不超过l％,随着了0／0的增大,适用范围略有扩大。SV波近似公式的精度比P波要低一些,在｜ε｜≤0.1且｜δ｜≤0.14,或｜ε-δ｜〈O．02（ε和占为正）时,SV波相速度平方线性近似公式的最大相对误差不超过1％,随着α0/β0的增大,适用伪范围明显缩小。总体来说,P波近似公式适用范围较大,对一些中等强度的各向异性也适用;SV波近似公式尤其是群速度近似公式适用范围很小,必要时需要使用高阶近似或者精确解。     

一种基于分组填充Mix策略的匿名通信机制

Mix机制为实现匿名通信技术提供了可行的解决方案,但攻击者仍可以在一定程度上通过流量分析来获取通信关系。为了进一步提高Mix机制对抗信息量分析攻击的能力,提出了分组填充的思想,并基于分组填充Mix策略给出了一种新型匿名通信机制。算法分析和仿真实验表明,与传统Mix机制相比,新的基于分组填充的Mix机制,能在有效抵御信息量分析攻击的同时,进一步降低网络的额外带宽开销。     

地面井抽采卸压瓦斯技术在新疆大倾角多煤组矿区的应用

针对新疆艾维尔沟矿区大倾角多煤组地表岩层移动与覆岩破坏特征,分析了大倾角多煤组地面井失稳机制,合理选择了地面井位置,优化了钻固井工艺及井身结构,并进行了适用性试验考察。试验工作面推过后井身结构稳定,套管基本未发生异常变形破坏,地面井抽采瓦斯持续稳定,可为新疆矿区大倾角多煤组地面井高效抽采瓦斯提供技术支撑及示范作用。     

COSET PARTITION OF ADDITIVE GROUPS AND MINORITY-LOGIC DECODING ALGORITHM FOR RM CODES

Two new notions for the coset partition of dyadic additive groups are proposed,andtheir sufficient and necessary conditions are also given.On the basis of these works,the feasibilityproblem of implementing minority-logic decoding algorithm for RM codes is solved.     

工业互联网标准化工作现状与策略研究

工业互联网是典型的交叉融合领域,原有信息通信领域和工业领域的标准无法完全适用于工业互联网,为有效推进工业互联网有序发展,避免标准缺失、交叉、重复等问题,急需形成统筹协作、目标明确、高效高质的标准化工作平台环境,加快相关标准研制,推进工业互联网有序发展。     

Notes数据库中存取控制的自维护

Lotus Notes开发平台是一个面向非结构化信息领域优秀的通信处理软件和群件平台。本文将Notes数据库中存取控制安全机制和传统的关系数据库相结合,根据人员工作的调整自动改变人员在Notes系统中的相应权限,实现Notes存取控制安全机制的自维护