Almandine megacrysts from Yingfengling Cenozoic basalt in Leizhou Peninsula and their parental magma origin

The garnet megacrysts from Yingfengling basalts are characterized by high FeO (>20%), CaO (7.02% –8.16%) and low MgO (5.88%–10.87%). Significant composition variations are observed in these megacrysts, of which Ni, V, Sc, Co, and HREE are positively correlated with their Mg^#, and Zr, Hf, Ga, Y, Sr, Nb, Zn and LREE-MREE are negatively correlated with Mg^#. Megacryst parent magma is a highly evolved residual melt with strongl depletion in Ti, Sr, Hf, Nb and HREE. This parental magma was generated by more than 60% of crystallization fractionation of clinopyroxene, garnet, plagioclase and ilmenite from quartz tholeiitic magma. It has not erupted to the surface, but stayed at the upper mantle and formed the megacrystic cumulate. Megacrysts and their host basalt are in disequilibrium.     

鞅的极大函数的Φ－可积性

设ｆ是的极大函数，本文讨论ｈ（ｆ）的几种Φ－可积性（其中ｈ，Φ是凸函数），并给出相关不等式中的常数ｃ的一个上界。     

同步异构并行多机系统的编译技术

本文讨论具有同步异构多机体系结构的全数字仿真计算机（如ＹＨ—Ｆ２）的实时仿真语言的编译技术。即讨论如何变多机系统为虚拟的单机系统，如何使用上下文有关文法来定义算术、逻辑表达式，以及如何使用自动机理论来进行语法分析和语法制导翻译。     

一类反应扩散系统解的边缘稳定性──肺动脉毛细血管中血红蛋白反应的研究

发生于肺动脉毛细血管中血红蛋白的氧化反应扩散系统是带有非齐次混合边界条件的五分支方程系统，对此系统该文通过化非齐次边界条件为齐次边界，而后构造一类Ｂａｎａｃｈ空间，在其上借助于讨论齐次线性化算子的谱结构，得到了一特殊平衡解的边缘稳定性．     

一类非线性双曲方程解的不稳定性

本文讨论了一类非线性双曲方程具有第三类非线性边界条件的正的古典解的不稳定性问题,并且得到了爆破时刻的上界。     

Dynamic broadcast encryption scheme with revoking user

Currently, there still lacks an efficient methodology to revoke user’s ability to decrypt ciphertext in broadcast encryption with the uncertain number of ciphertext recipients. To solve this problem, here, we present a dynamic broadcast encryption scheme with the following properties: First, the length of the ciphertext has a linear relationship with the number of revocable users, but it has no association with the total number of ciphertext recipients. Second, the scheme also works when users dynamically join. Especially, compared with methods published up to date, our scheme is more efficient with a large number of ciphertext recipients. Third, the broadcaster can revoke user’s ability to decrypt ciphertext if necessary. Fourth, the private key of users is composed of three elements in Elliptic curve group of prime order. Last, if q-Decisional Multi-Exponent Bilinear Diffie-Hellman assumption holds, our scheme is secure in the standard model when a polynomial time adversary selectively attacks it.     

Atmospheric Pressure-Aware Seamless 3-D Localization and Navigation for Mobile Internet Devices

This paper describes a seamless three-dimensional (3-D) localization and navigation system for smartphones.The smartphone includes an atmospheric pressure sensor to measure the user’s altitude that is combined with the outdoor Global Positioning System (GPS) and indoor WiFi-APs localization systems in a seamless 3-D localization system.The smartphone software also provides seamless navigation services by updating map information for both indoor and outdoor locations through the mobile Internet.The indoor floor information calculated from the altitude information is used to project localization anchor nodes,e.g.,WiFi-AP,on different floors onto the user’s floor with an indoor 3-D localization algorithm using projection distances based on a Received Signal Strength (RSS) algorithm.Tests show that the 3-D method reduces systematic errors and achieves much higher accuracy than the traditional two-dimensional localization method.     

不规则综采工作面旋转开采实践

为了提高煤炭资源回收效率,在分析综采工作面旋转式开采现状基础上,深入研究了综采工作面旋转开采技术,对N3408工作面优化设计.通过优化设计多回收煤炭11万吨.工作面初采时,回顺转角45°,旋转弧长192 m,同时在转采过程中过一条旧巷,与工作面夹角70°.总结了安装工艺、转采施工工艺、工作面倾角对运输机窜量及转采切割循环关系,解决了旋转开采实践中的关键技术,取得了显著的技术经济效果,给出了其适用条件和应注意的问题,为不规则综采工作面旋转开采积累了宝贵经验.     

农村"三变"改革助推精准扶贫模式及成效评价——以贵州4种"三变"改革模式为例

探讨农村"三变"改革扶贫模式及其成效,为贫困地区选择适合的脱贫模式,巩固脱贫成效提供参考。通过对贵州5个村寨进行调研,获得270份有效问卷,从经济效益、社会效益和生态效益构建农村"三变"改革助推精准扶贫成效评价体系,采用AHP—模糊综合评价法对贵州农村的4种"三变"改革扶贫模式进行分析,评估助推精准扶贫成效。结果表明:1)塘约村"三变"+村党总支+合作社+企业+贫困户模式,社会效益最好,隶属度值为0.172 5;弄苑村"三变"+村集体+互联网+贫困户模式的生态效益最好,隶属度值为0.035 4,社会稳定性强。2)海坪村"三变"+易地扶贫搬迁+贫困户模式,精准扶贫成效显著,经济效益隶属度值为0.152 1,有效地带动贫困户就业和增收。3)山王庙村和扰绕村的"三变"+乡村旅游+公司+贫困户模式成效稍弱,综合效益指数分别为0.021 0和0.025 4,乡村旅游发展的"去农化"现象并未真正解决农户的根本问题,带动就业率不高。     

川东北优快钻井技术

川东北地区存在陆相地层可钻性差、高陡构造井斜严重,地层岩性变化大、压力系统复杂、易塌、易漏,“高压、高产、高含硫”勘探风险大等世界级钻井技术难题,造成的钻井复杂情况多、机械钻速慢、钻井周期长。围绕“钻井提速”这一主线,以开发与应用新工艺、新工具提高南方复杂深井钻井速度为目的,从气体钻井和垂直钻井设备引进配套和研发入手,结合已有的欠平衡钻井技术、控压降密度钻井与复合钻井技术,综合应用多种钻井技术全面提高川东北复杂深井钻井速度及井身质量,通过室内实验研究、单项技术试验和综合技术集成,形成了适应川东北地区地层特