陕西某鳞片石墨矿选矿工艺试验研究

以陕西某地鳞片石墨矿为研究对象，在其X射线衍射分析和化学分析的基础上，进行了系统的选矿工艺试验研究，确定了最佳粗磨磨矿细度、粗选捕收剂用量、起泡剂用量及粗选矿浆浓度，并在此基础上进行了全流程的开路试验和闭路试验，并对闭路浮选精矿进行了成分和形貌分析。结果表明，该矿石为晶质片状石墨，固定碳含量为13.70%，主要脉石矿物为方解石和石英。经过系统选矿试验，最终确定采用一次粗磨、一次粗选、五次再磨和六次精选闭路流程，获得了精矿固定碳含量95.92%、回收率90.35%的良好指标。精矿分析结果表明，脉石矿物主要存在于粗粒级和细粒级中，鳞片石墨粒径大部分在50 μm以上，石墨鳞片结晶普遍较好，表面平滑，大鳞片石墨受到磨剥，有少量细小杂质颗粒附着于表面上。      

Medical image detection and azithromycin in the treatment of pelvic inflammation based on intelligent hospital system

The pelvic infection and people genital tract inflammation, infertility, chronic pain, and reasons for detecting ectopic pregnancy. Diagnostic and management challenges, from different signs and symptoms and a variety of microbial etiology is not fully delineated largely responsible. Because of the potential for serious things of the network, it is recommended for the diagnosis and treatment of low barriers to entry. One of pelvic inflammatory infection of pregnant woman of childbearing age is not the most testing an important public pelvic problem remains. This is the main long-term internet of things, such as tubal factor infertility, ectopic pregnancy and chronic pelvic pain. Also, acute care and its complications lead to significant pelvic care costs. These long-term preventions of the internet of things depend on the microbial cause of acute knowledge of strategies based on treatment. All aware that it is a polymicrobic acute infection. Organisms, Chlamydia trachomatis and Neisseria gonorrhoeae sexually transmit presence, in many cases, including the endogenous vaginal and cervical flora often associated with microorganisms. It contains anaerobic and facultative bacteria similar to those associated with bacterial most importantly mycoplasma has also recently been involved in acute reasons. Therefore, a therapeutic regimen for acute should provide a wide spectral range that is effective against these microorganisms.     

薄煤层复合顶板巷道支护参数优化研究

以滨湖煤矿12210工作面材料巷为研究背景,在原有巷道支护方案的基础上,提出了2种巷道支护参数优化方案。运用FLAC3D数值模拟软件对原方案、方案1、方案2进行了分析对比。通过对不同方案下的巷道垂直、水平应力和位移云图分析研究发现,支护方案2为最优方案。方案2的支护密度相对原方案有所降低,因此,方案2在一定程度上节约了滨湖煤矿的支护费用和施工成本,提高了企业的经济效益。     

污水处理中小球藻的自絮凝特性

以BG11(+N)培养基和模拟生活污水为底物,考察了污水处理小球藻(Chlorella vulgaris)的自絮凝特性,探究了自絮凝机理。结果表明:以短沉淀时间运行,小球藻在模拟生活污水中自然形成絮体,沉降性良好;藻细胞表面粗糙,含有丝状、胶状胞外聚合物;絮体内部含有大量短杆菌、球菌;絮体具有相对较高的Na、P、Fe、Ca、Mg元素含量,无机物中主要物质形态为Ca4O(PO4)2。污水处理小球藻的絮凝机理为:基质条件及反应器运行参数等促使藻细胞生理过程发生改变,藻细胞分泌更多絮凝性胞外聚合物增强黏附,生化过程富集P、Fe、Ca、Mg元素改善沉降性,絮凝性细菌大量繁殖促进菌藻共絮凝。     

Local community detection for multi-layer mobile network based on the trust relation

Wireless Networks - With the fast development of mobile Internet, people’s social exchange media has transformed from the traditional social network to mobile network. With the explosion of...     

混凝土中消除氯离子的原理与应用

混凝土碳化或氯离子侵入混凝土都能导致混凝土中钢筋发生腐蚀 ,而氯离子腐蚀钢筋引起的后果更为严重。防止和减缓钢筋腐蚀是改善和提高混凝土结构耐久性的主要途径。防止和治理钢筋腐蚀的方法很多 ,但在经济和技术上都有局限性。研究了用除盐法直接排除混凝土中的氯离子 ,对混凝土中的钢筋腐蚀进行治理的原理 ,介绍了除盐法的工艺及应用效果 ,分析比较了除盐法与其它电化学方法的防治效果 ,讨论了除盐对结构受力性能的影响等。     

Insights into ground shock in jointed rocks and the response of structures there-in

Ground shock in rock masses is created by dynamic events such as rock-bursts, coal bumps or man-made explosions. This article examines two aspects of the phenomenology: the propagation of ground shock, and its effects on underground structures. Numerous experiments, at all scales, as well as numerical modeling clearly show that geologic discontinuities have a large influence on ground shock propagation through their actions as wave-guides or as decoupling features. Three-dimensional discrete element (DE) numerical models provide additional insights into the dynamic response of underground structures as influenced by joint orientation, joint spacing, characteristics of the loading pulse (duration, peak velocity, peak displacement), and repeated loadings. It is also shown that in hard rocks the deformability of rock blocks has a negligible influence on tunnel dynamic structural response compared to that of the joint sets or bedding. When viewed together with pictures of underground failures, the 3-D DE models are shown to capture quite well the kinematics of jointed rocks, and their power is illustrated through a very large simulation of an underground facility under dynamic loading.     

早龄期钢纤维混凝土抗裂性能测试与计算

采用三点弯曲切口梁和楔入劈裂紧凑拉伸两种试验模型，测试早龄期阶段钢纤维混凝土材料的抗裂性能；由试验数据计算裂纹应力强度因子和断裂能等表征断裂性能参数。通过分析试验与计算数据，发现随着龄期的增长，钢纤维混凝土的承载能力和抗裂性能都不断增大，在早于7d龄期内，钢纤维与混凝土基体之间的界面作用已经比较明显，抗裂能力明显强于同阶段的普通素混凝土。