信息技术在医院病案统计中的应用

伴随着我国综合实力的不断提升,信息技术获得了突飞猛进的发展,如今,医疗改革如火如荼地进行,医院的信息管理工作同以往相比较也实现了极大的发展。病案统计工作是指相关工作人员对医院中患者的信息进行全面统计,若是这项工作完成得足够出色,会给医院后续的信息查询工作带来诸多方便和快捷,也能够在某种程度上使医院管理效率和质量实现一定幅度的提升。因此,将信息技术和医院的病案工管理工作进行密切结合,就成为病案管理人员应当重点思考的问题。病案统计工作是医院管理工作中的一个重点环节,病案统计结果能够为医院整体绩效带来十分深远的影响。因此,投入更多时间和精力来提高对这项工作的重视,显得十分关键和重要。文章对信息技术在医院病案统计中的应用展开了分析。     

Evaluation of bull fertility in Italian Brown Swiss dairy cattle using cow field data

Dairy bull fertility is traditionally evaluated using semen production and quality traits; however, these attributes explain only part of the differences observed in fertility among bulls. Alternatively, bull fertility can be directly evaluated using cow field data. The main objective of this study was to investigate bull fertility in the Italian Brown Swiss dairy cattle population using confirmed pregnancy records. The data set included a total of 397,926 breeding records from 1,228 bulls and 129,858 lactating cows between first and fifth lactation from 2000 to 2019. We first evaluated cow pregnancy success, including factors related to the bull under evaluation, such as bull age, bull inbreeding, and AI organization, and factors associated with the cow that receives the dose of semen, including herd-year-season, cow age, parity, and milk yield. We then estimated sire conception rate using only factors related to the bull. Model predictive ability was evaluated using 10-fold cross-validation with 10 replicates. Interestingly, our analyses revealed that there is a substantial variation in conception rate among Brown Swiss bulls, with more than 20% conception rate difference between high-fertility and low-fertility bulls. We also showed that the prediction of bull fertility is feasible as our cross-validation analyses achieved predictive correlations equal to 0.30 for sire conception rate. Improving reproduction performance is one of the major challenges of the dairy industry worldwide, and for this, it is essential to have accurate predictions of service sire fertility. This study represents the foundation for the development of novel tools that will allow dairy producers, breeders, and artificial insemination companies to make enhanced management and selection decisions on Brown Swiss male fertility.     

陕北浅埋煤层绿色保水开采技术研究

王家沟煤矿为陕北典型浅埋煤层矿井，地下煤炭资源开采有可能破坏萨拉乌苏组潜水含水层。为有效的控制导水裂隙发育，最大限度保护地表含水层，基于协调开采的原理，结合力学模型和相似材料模拟试验，对比研究了一次采全高和限高留煤柱两种开采方法导水裂隙发育规律。研究表明，一次采全高条件下导水裂隙呈间歇式变速发育最大高度94m，穿过含水层|限高留煤柱协调开采导水裂隙发育平缓，最大高度60m|关键层的稳定决定着含水层的稳定，限高留煤柱能够显著的控制协调关键层挠曲下沉，有效的抑制导水裂隙发育，实现含水层下绿色保水开采。     

矿井防尘供水管网相似试验模型构建与测点优化

依据水力相似理论,提出了构建与矿井防尘供水管网等效的相似试验模型的理论方法,基于流体力学基本方程和量纲分析法,结合重力相似准则和压力相似准则,推导出矿井防尘供水管网与其相似模型主要物理指标之间的关系,运用EPANET水力模拟软件求解最大防尘用水量下管网原型与模型水力工况并进行误差分析。结果表明,管网原型与变态相似模型对应管段的流量、流速和压差相似比尺的平均相对误差分别为0.20%、0.46%和-4.20%,验证了相似试验模型构建的合理性和可行性。同时,为进一步实现对相似物理模型水力工况的有效监测,基于信息理论和相关系数构建测点优化数学模型,并结合日防尘用水需求的动态水力模拟,对压力监测点进行优化布置。     

基于相似系数法的冷源供水温度研究

针对中华鲟保育池冷冻水系统冷源设备选型采用经济性或生态因子进行单因素比选的不足,通过相似系数法对保育池不同水温工况下的经济性和生长影响因子赋予权重,提出了统筹经济指标和生长影响因子指标的综合评价指标。分析结果表明,21℃为保育池冷冻水系统最佳供水温度,不仅满足中华鲟生长对水温的要求,经济性也较好。将基于相似系数法的权重确定方法应用于保育池冷源供水温度的比选,提高了比选的客观性,对其他涉及主观性评价指标的方案比选具有一定的借鉴意义。     

似椭圆法设计保护煤柱的方法研究

在保护地面上一点、一条直线原理的基础上,提出了似椭圆法留设保护煤柱的基本原理,给出了留设保护煤柱的方法与步骤。在进行实例分析的基础上,得出了与传统垂直断面法保护煤柱的方法相比,用似椭圆法设计保护煤柱可以大大解放“三下”呆滞煤量的结论,并设计了用计算机绘制似椭圆法保护煤柱的方案。     

脉冲射流驱散上隅角积聚瓦斯的理论实验研究

针对“U”采煤工作面上隅角瓦斯积聚,提出了脉冲射流驱散上隅角积聚瓦斯的新理论和新技术。根据相似理论,建立脉冲射流驱散上隅角积聚瓦斯的实验系统,通过实验验证了其科学性、有效性和可行性。实验结果表明：当脉冲射流风机的旋转方向与主风流方向相同时,允散上隅角积聚瓦斯的效果较好,提高脉冲射流的风速和降低旋转的频率可显著地提高驱散上隅角积聚瓦斯的效果。当射流风速为3－5m/s时,可提高风流的扩散系数2－4倍,有效射程可达10m以上,有效地驱散了工作面上隅角的积聚瓦斯。     

岩体断裂面渗流特性的分形研究

应用分形理论，建立了描述岩石断裂面的自仿射随机分形理论模型，根据该模型探讨了单一裂隙渗流水力参数与自仿身分形维数之间的关系，对影响断裂面渗流特性的诸因素进行了分析，研究表明，分形维数作为定量刻划断裂面的参数亦可用于定量描述断裂面的水力参数。     

Engineering practice of reducing ground subsidence by grouting into overburden bed-separated and similar model experiment

The subsidence prediction theory under the condition of grouting into bedseparated was developed. Reducing ground subsidence by grouting was carried out on eight fully-mechanized top-coal caving faces, by using the continuous grouting in multiple-layer to obtain experiment results of reducing subsidence under fully mining. The similar material model that can be dismantled under the condition of constant temperature and constant humidity was developed. The model was used to simulate the evolution of overburden bed-separated under such constraints of temperature and humidity, at the same time, and to test the hardening process of similar materials.     

类纤维对油井水泥作用机理的实验研究

为了改善普通油井水泥物理力学性能的均衡性，提高普通油井水泥抗拉伸破坏的能力，研制了类纤维水泥。利用室内实验系统研究了类纤维改善水泥石抗折强度、抗冲击韧性和胶结强度的机理，并进行了验证。结果表明类纤维水泥较普通油井水泥，其抵抗拉伸破坏的能力显著提高，原因在于类纤维水泥中的活性物质与水泥水化过程中的水化产物耦合反应，在水泥基体中生成了类纤维物质，该物质的生成和合理分布显著改善了普通油井水泥物理力学性能的均衡性．提高了水泥石抵抗拉伸破坏的能力。