核桃岩沟南区煤矸石堆场生态修复实践

煤矸石是我国排放量最大的工业固体废弃物,也是煤矿区环境整治的一大难题。以阳泉市南庄矿核桃岩沟南区煤矸石堆场生态修复实践为例,介绍了煤矸石堆场整形整地技术要点:整理后的地形坡度为28°左右,平台覆土厚度50~100 cm,施工中机械自然碾压;边坡覆土厚度30~50 cm,实施分层覆土并人工压实,土壤密度底层1.60~1.80 g/cm³、表层1.25~1.35 g/cm³。同时介绍了项目区生态修复适宜物种的选择、植被群落配置及其栽植技术要点。项目实施后,绿化效果明显（干旱春季植被覆盖率约70%）。煤矸石堆场生态修复实践可为同类项目尤其是气候干旱地区的矿场绿化提供经验及参考。     

Antiviral Effects of ABMA and DABMA against Influenza Virus In Vitro and In Vivo via Regulating the Endolysosomal Pathway and Autophagy

Influenza virus is an acute and highly contagious respiratory pathogen that causes great concern to public health and for which there is a need for extensive drug discovery. The small chemical compound ABMA and its analog DABMA, containing an adamantane or a dimethyl-adamantane group, respectively, have been demonstrated to inhibit multiple toxins (diphtheria toxin, Clostridium difficile toxin B, Clostridium sordellii lethal toxin) and viruses (Ebola, rabies virus, HSV-2) by acting on the host’s vesicle trafficking. Here, we showed that ABMA and DABMA have antiviral effects against both amantadine-sensitive influenza virus subtypes (H1N1 and H3N2), amantadine-resistant subtypes (H3N2), and influenza B virus with EC₅₀ values ranging from 2.83 to 7.36 µM (ABMA) and 1.82 to 6.73 µM (DABMA), respectively. ABMA and DABMA inhibited the replication of influenza virus genomic RNA and protein synthesis by interfering with the entry stage of the virus. Molecular docking evaluation together with activity against amantadine-resistant influenza virus strains suggested that ABMA and DABMA were not acting as M2 ion channel blockers. Subsequently, we found that early internalized H1N1 virions were retained in accumulated late endosome compartments after ABMA treatment. Additionally, ABMA disrupted the early stages of the H1N1 life cycle or viral RNA synthesis by interfering with autophagy. ABMA and DABMA protected mice from an intranasal H1N1 challenge with an improved survival rate of 67%. The present study suggests that ABMA and DABMA are potential antiviral leads for the development of a host-directed treatment against influenza virus infection.     

傅立叶变换红外光谱法快速鉴别润滑油真伪

基于润滑油的组成,通过傅立叶变换红外光谱法分析润滑油基础油和添加剂的差异,并结合ICP-AES测定润滑油中的元素的结果,进一步验证FT-IR的判定。试验表明,傅立叶变换红外光谱法可以快速有效地鉴别润滑油真伪。     

PC-BASED控制器VIPA-PC288及其应用

为解决传统PLC的不足，各种新型PLC已开始投入使用。PC-BASED控制器VIPA-PC288不仅保持了传统PLC的优越性能，而且具有编程调试方式灵活，通信功能强大以及支持用户程序对处理器的并行操作等技术优势。在详细介绍PC288性能及编程特点的基础上。给出了以其为主控制器构建的控制系统。实践证明：该控制系统实现了高性能的控制，取得了良好的经济效益。     

一种基于计算机控制的接触式测厚仪

介绍了一种利用计算机控制系统实现热钢板接触式厚度测量的方法.该方法采用机械装置将被测物夹紧,用旋转编码器做位置传感器,通过工控机辅以高速计数模板实现自动测量.该方法结构简单、工作可靠、造价低、测量精度高,极适合在恶劣工况下替代人工实现自动测量.     

声强法测声功率的工程应用研究

本文从工程实用角度出发,以实验分析为基础来探讨声强法测量声功率的误差问题,主要将背景噪声与测量环境结合起来,研究背景噪声,声源表面吸收在不同环境中的影响,还对声强法与声压法的判别作了比较,经试验研究表明,在一般厂房中用声强法测量设备声功率时,即使背景噪声比设备声压级高11dB都可照常进行,结果勿需修正,本文的结论对工程实践中声强法的应用具有现实的指导意义。     

冲击负荷对电力系统可靠性影响的分析

冲击负荷对电网和电力设备带来多方面不利影响,主要从可靠件的角度对其进行研究.首先分析了来临时刻符合泊松分布、强度相互独立的冲击负荷对普通元件停运的影响.进而采用首次运行期望时间参数对常规负荷情况下的电力元件可靠性参数进行修正,并以此为基础进行冲击负荷下的电网可靠性评估.通过对冲击负荷和常规负荷2种情况下电网可靠性进行对比分析,得到冲击负荷对电网运行风险的影响.某实际地区电网算例验证了所提方法的正确性和有效性.该研究为在冲击负荷卜进行系统运行风险分析和安排检修计划提供了定量的理论依据.     

Optimization of Cluster-Based Cooperative Spectrum Sensing Scheme in Cognitive Radio Networks with Soft Data Fusion

This paper investigates cluster-based cooperative spectrum sensing issues in two-layer hierarchical cognitive radio networks with soft data fusion. We first define a two-phase reporting protocol in the paper. In the first phase, secondary users forward their soft sensing information to cluster heads (CHs) over large-scale fading. In the second phase, all CHs transmit the aggregated soft energy information to the fusion center (FC) with different weights. Thus we derive the network false alarm (FA) and the detection probabilities as functions of the FC decision threshold, the clustering algorithm and different weights. Given a target on the detection probability, minimizing the FA probability is then formulated as a constraint optimization problem within two scenarios including additive white Gaussian noise environment and Rayleigh fading environment. A close-form upper bound of the FA probability is derived and a novel clustering scheme is also proposed for each scenario. Numerical results show that the proposed schemes achieve a satisfying performance.     

关于变频涡旋压缩机动盘运转稳定性探究

在涡旋压缩机设计过程中,确保动盘稳定运转是设计中核心技术点之一.为更准确的计算动盘运转稳定性,以某型号的涡旋压缩机为研究对象,结合压缩机实际运转过程,分析动盘受力特性;推导出动盘运转稳定性计算的理论数学模型,将复杂的动盘运转稳定性问题转化为止推反力作用点的求解问题.通过试验掌握了背压与转速之间的线性关系,进一步完善全频...