乌头硷中毒致心律失常病例分析

分析了乌头硷类药物致心律失常的病例及治疗方法。     

激光产生应力波的研究和应用

由于激光与液体或固体相互作用时伴随有气化过程和热弹性效应，这种效应导致应力波的产生。这种应力波又称为高频声波。它是近年来研究工作者的新课题。对这种激光与材料声场相互作用的研究建立了一门新的学科，曰“光声学”。最近发展起来的光声光谱学、光声显微镜、     

大埋深粘土三轴高压卸载变形与强度特征

以取自山东巨野矿区埋深近 4 30～ 6 0 0m的深部粘土样为例 ,分析测试了土的常规物理力学性质参数。考虑该埋深土的天然应力水平及其在煤矿建井开挖中的卸载应力变化 ,在三轴伺服仪上 ,进行三向等压分别达 11MPa、12MPa、14MPa下的卸除围压、保持轴压的三轴高压卸载试验 ,分析了深部粘土三轴高压卸载变形和强度特点 ,得到了相关力学参数。成果丰富了土的高压卸载力学性研究 ,并为巨野矿区煤矿立井建设提供了工程地质基础参数     

水电阻性质的实验研究

本文报导了水电阻的一些性质。     

钛-(口底)唑-CTMAB体系及其用于测定钛的探讨

(口底)唑是一种灵敏的显色剂,为此本文对钛-(口底)唑-阳离子表面活性剂的三元体系进行了研究,结果表明:钛、(口底)唑和所研究的几种阳离子表面活性剂均可形成三元胶束络合物,而其中以CTMAB为最佳,其摩尔吸光系数可达1.1×10⁵。所拟定的方法用于测定水中痕量钛,结果较满意。     

主动中子多重性铀质量测量模拟研究

中子多重性技术常用于测量和核查核材料,尤其针对具有较厚屏蔽的对象具有不可替代的优势。钚的自发裂变率较高,可以采用被动测量方法,目前已有多款不同的测量装置。然而铀材料的自发裂变率较低只能采用主动测量方法。现有的主动井型符合计数器（AWCC）能够进行主动中子多重性测量铀材料质量,但依然存在探测效率较低,Am-Li中子源产生偶然符合大等缺点。为提高铀材料测量的效率和精度,对主动中子多重性测量方法开展深入研究非常必要。本文参考AWCC模型,利用Geant4软件对探测器和粒子的输运过程进行建模。研究了多重性移位寄存器的不同符合门宽、不同延迟时间对铀测量结果相对偏差的影响规律。计数器的最佳门宽为44 μs,门宽取值范围在计数器衰减时间的1.5倍左右合适;延迟时间大于3倍计数器衰减时间后,相对偏差显著减少。最后讨论了235U富集度变化对主动中子多重性测量结果的影响。为后续主动中子多重性铀质量测量仪器的设计提供了参考。     

Research on Sentiment Analysis of Network Forum Based on BP Neural Network

Nowadays, people pay more and more emotional to the emotional analysis of specific goals. Due to the long training time of many networks, this paper proposes a neural network with specific Objective sentiment analysis. Compared with the current neural network, the algorithm proposed in this paper has a shorter training time, which can effectively make up for the lack of emotional mechanism. Finally, we use the emotional data set to carry out simulation experiments. The experimental results show that the proposed algorithm is better than the ordinary neural network algorithm.

     

残炭颗粒的形态、结构及其在燃烧过程中的分布

本文利用光学显微镜和电镜,阐述了不同残炭颗粒的形态和结构以及它们在燃烧过程中的分布特征。这些结果表明,残炭颗粒的形态结构特征不仅依赖于煤的显微组分组成,而且也依赖于煤的变质程度。由镜质组形成的残炭(包括薄壁煤胞、厚壁煤胞和网状炭)在燃烧过程中迅速减少。而来自于惰性组的未熔炭,当它以等密度方式燃烧时,其数量上的减少非常缓慢,所以它们可能导致电厂飞灰中未燃炭含量增高。     

Gas Permeability of Fractured Sandstone/Coal Samples under Variable Confining Pressure

Rock fractures transmit underground gas effectively once they have sufficient widths and interconnection. However, the fracture geometries needed for gas transport are strongly influenced by surrounding pressure conditions. In order to inspect and quantify the influence of surrounding pressure, we design and manufacture a set of gas flow apparatus that can be connected to the MTS815 material testing system, which provides loads and exhibits external pressures in the experiment. With the apparatus and MTS815, we test the fractured samples of sandstone and coal and obtain their relationship between permeability and external pressure. In particular, our permeability calculation based on collection of gas flux and pressure difference has involved the influence of non-Darcian flow. In addition, our study also includes a numerical simulation in the RFPA software platform to display the internal field changes of cracks. The results show that fracture permeability strongly depends on confining pressure, and a critical pressure probably occurs, about 1.5–2 MPa in our experiments, to split each of the permeability curves into two stages, a slow climb and an exponential rush. As a complement, the numerical simulation also demonstrates one more stage for the permeability curve, the post-rush steady fluctuation.     

镀膜型nMCP探测效率和位置分辨优化的蒙特卡罗模拟研究

中子敏感微通道板(Neutron sensitive microchannel plate,nMCP)因其具有高探测效率和位置分辨,配合先进的读出电子学可作为能量分辨中子成像探测器的优先选择.相比于基体掺杂型的nMCP,基于原子层沉积技术(Atomic Layer Deposition,ALD)的nMCP具有原材料消耗...