分频成像技术在涠西南凹陷的应用

分频成像技术是运用小波变换提取不同主频剖面,利用地震中的高、中、低频带信息选择最佳成像频带剖面,该剖面相对常规剖面而言,可进行断层和储层的精细解释研究。本文以南海北部湾盆地涠西南凹陷为例,在介绍分频成像方法原理的基础上,重点介绍该技术在本区域构造解释中的应用,并对其应用效果进行分析。     

洛伦兹曲线在油藏产液、吸水剖面评价中的应用

论述了运用洛伦兹曲线分析评价油藏产液剖面与吸水剖面不均匀程度的过程,利用"不均匀系数"评价油藏产液剖面与吸水剖面不均匀程度,并结合油田实例进行分析,对于油藏产液剖面与吸水剖面的研究具有一定的借鉴意义。     

基于VolumeViz的储层可视化研究与实现

研究了Open Inventor的扩展模块VolumeViz提供的支持海量数据集的转化和数据整合技术,介绍了新的数据存储格式LDM,并将传统的SEGY地震数据转换为LDM文件格式,最终设计实现了油藏储层剖面的三维显示。     

决策树下引入残差数据合并的冗余数据挖掘

提出采用残差数据合并技术的冗余数据优化挖掘算法,利用训练集建立决策树模型,引入C4.5决策树模型进行冗余数据主特征建模,在主分量特征决策树下,引入残差数据合并技术,设定数据残差特征伴随追踪模式,把传统方法中用于滤除的数据信息进行拼接伴随追踪定位,实现了冗余数据特征的优化挖掘。把方法应用到网络流量时间序列数据处理中实现网络异常监测,仿真实验表明,新的数据挖掘算法能有效提取到冗余数据特征作为有用检测特征,数据挖掘效率大幅提高,有效促进了海量数据隐藏特征的挖掘和应用,设计的网络流量监测软件能提高网络管理和监测实效性。     

浅谈农村住宅的剖面设计

农村住宅的剖面设计往往容易被忽略。文中主要阐述了住宅剖面设计的技术方法,表达了剖面设计不仅能丰富住宅外部造型,增强与内部空间的密切联系,还能创造出多样性的外部空间,营造属于城市特色的城市景观和城市文明。     

基于剖面与层面的三维地质建模

三维数据模型,建模方法适用于不同比例尺数据的模拟,由于建立了地质体的网络模型,易于实现空间数据分析与应用,因此,也是目前采用比较广泛的建模方法。这种方法包括常用的两种建模方式:基于剖面的建模和基于层面的建模。     

内蒙古阿尔山哈尔巴地区新近系五岔沟组玄武岩含矿性分析

通过对内蒙古阿尔山哈尔巴地区新近系五岔沟组玄武岩实测剖面岩石光谱分析得出,五岔沟组除Sn元素少量样品高于克拉克值外,其余Au、Cu、Zn、W、Mo、Hg、Mn、Ni、Ag、As、Sn、Bi、Sb含量低于或大体接近克拉克值.新近系找矿潜力不大,找到工业矿体的可能性较小.     

对中国服务业职工工资剖面曲线和人力资本投资期的估算

本文利用二次回归方程得到中国服务业职工的工资剖面曲线。并根据回归系数估算出中国服务业职工在职培训总投资期为25年,净投资期为7.5年,远远低于美国的数据,中国服务业对职工的在职培训投资严重不足。     

2．5D（二度半）交互反演技术在四川德昌某钒钛磁铁矿区的应用

用GPS导航定位,对四川德昌某钒钛磁铁矿区II号磁异常布置精测剖面,测定该区岩矿石标本磁性参数,采集地磁场总强度值,利用中国地质大学（武汉）研发的MAGS3．0软件,对A—A’数据进行2．5D人机交互反演并成图,根据地球物理理论,推断了地下可能存在的磁性异常体及有利的成矿部位,为下一步的地质勘探工作提供地球物理依据。     

欠驱动式水下监测机器人航路点轨迹跟踪控制技术研究

欠驱动式水下剖面监测机器人要实现对预定剖面轨迹航路点的跟踪观测,其航路点的轨迹跟踪控制技术是实现高精度剖面观测的关键。研究思路为:首先采用物理建模和实验验证方式对水下机器人进行动力学建模;其次通过设计分布式控制器A和控制器B以及两者之间的通信协议,实现对通信时延的实时计算;然后通过扰动前馈和逐次逼近转换方法,设计能有效抑制脐带缆等外扰动并解决通信网络时延的网络化前馈-反馈最优轨迹跟踪控制方法。其中为实现平滑控制通过设置跟踪误差阈值和控制切换面,设计一种能实现无抖振航路点轨迹跟踪的分段复合有限时间跟踪控制方法。研究步骤为机器人动力学建模、前馈-反馈最优跟踪控制和分段复合有限时间跟踪控制算法设计以及控制方法的仿真和实验验证,分步进行并验证设计方法的有效性,为欠驱动式水下剖面监测机器人的轨迹跟踪控制技术提供理论依据。     

The data scientist profile and its representativeness in the European e-Competence framework and the skills framework for the information age

The activities in our current world are mainly supported by data-driven web applications, making extensive use of databases and data services. Such phenomenon led to the rise of Data Scientists as professionals of major relevance, which extract value from data and create state-of-the-art data artifacts that generate even more increased value. During the last years, the term Data Scientist attracted significant attention. Consequently, it is relevant to understand its origin, knowledge base and skills set, in order to adequately describe its profile and distinguish it from others like Business Analyst. This work proposes a conceptual model for the professional profile of a Data Scientist and evaluates the representativeness of this profile in two commonly recognized competences/skills frameworks in the field of Information and Communications Technology (ICT), namely in the European e-Competence (e-CF) framework and the Skills Framework for the Information Age (SFIA). The results indicate that a significant part of the knowledge base and skills set of Data Scientists are related with ICT competences/skills, including programming, machine learning and databases. The Data Scientist professional profile has an adequate representativeness in these two frameworks, but it is mainly seen as a multi-disciplinary profile, combining contributes from different areas, such as computer science, statistics and mathematics.     

关系数据库中关系模式的规范化

关系数据库中的关系模式直接影响了数据库中数据的完整性、准确性和一致性,好的关系模式能避免数据冗余和操作异常。关系规范化是设计关系模式的依据,是围绕函数依赖进行的。其基本思想是一个关系只描述一个主题,遵从"一事一地"原则,不能把彼此没有直接关联的属性放在一起,这将会导致关系数据库性能变坏。关系规范化过程是不断分解关系的过程。根据关系中属性间函数依赖情况规定了若干标准,这就是所谓的1NF、2NF和3NF,还有更高的范式,通常认为3NF在性能、扩展性和数据完整性方面都达到了最好的平衡,故一般关系模式设计要求达到3NF。     

宁波地区典型软粘土土性指标概率特性研究

通过宁波地区120项实际工程的勘察资料,对该地区普遍存在的典型淤泥质软土土性概率统计特性进行研究分析,采用土层剖面随机场模型,得到基本物理力学指标空间变异系数的变化规律,并根据土性指标揭示其工程特性;利用回归分析方法,建立其物理力学各指标间的相互经验公式.此外,还对典型土层直剪试验和固结快剪强度指标间的相关性进行了研究.     

Using profile expansion techniques to alleviate the new user problem

Collaborative Filtering techniques have become very popular in the last years as an effective method to provide personalized recommendations. They generally obtain much better accuracy than other techniques such as content-based filtering, because they are based on the opinions of users with tastes or interests similar to the user they are recommending to. However, this is precisely the reason of one of its main limitations: the cold-start problem. That is, how to recommend new items, not yet rated, or how to offer good recommendations to users they have not information about. For example, because they have recently joined the system. In fact, the new user problem is particularly serious, because an unsatisfied user may stop using the system before it could even collect enough information to generate good recommendations. In this article we tackle this problem with a novel approach called “profile expansion”, based on the query expansion techniques used in Information Retrieval. In particular, we propose and evaluate three kinds of techniques: item-global, item-local and user-local. The experiments we have performed show that both item-global and user-local offer outstanding improvements in precision, up to 100%. Moreover, the improvements are statistically significant and consistent among different movie recommendation datasets and several training conditions.     

Effect of felodipine on the serum lipid profile of patients with hypertension

Forty patients suffering from mild to moderate degree of hypertension were put on felodipine. Their lipid profile was analysed before the start of their therapy and consecutively at two and four months after starting felodipine. There was a statistically significant fall in the levels of serum cholesterol, serum triglycerides and serum total lipids; though no appreciable variation was observed in HDL and LDL cholesterol levels. At baseline there were a few patients who had higher than the normal range of the serum lipid profile. Analysis of these patients showed a highly significant fall in the levels of serum cholesterol, serum triglycerides, serum LDL-cholesterol and serum total lipids i.e. felodipine modified the lipid profiles of hypertensive patients in a positive way.     

大数据时代图书馆数据长期可用性保障研究

随着大数据时代图书馆大数据量增长速度加快,以及大数据总量的不断增加,数据的冗余问题将更加严重,人们越来越关注大数据的管理与利用问题。本文首先研究了大数据的基本概念。然后,对大数据时代图书馆数据长期可用性保障进行了研究。最后,提出了几条应对措施。     

“互联网+”战略下信息技术服务业创新效率评价研究——以北京、上海、广东三地为例

选取2013—2018年北京、上海、广东三地的信息技术服务业上市企业为研究样本,以三阶段DEA模型为主要研究方法,对信息技术服务企业的创新效率进行测度与评价。实证结果表明,政府补贴、股权集中度以及企业的国有产权性质会增加创新投入冗余,而企业规模和地区经济发展水平对创新投入冗余有抑制作用;信息技术服务企业的创新综合效率值较低,其主要原因在于纯技术效率低,资源投入结构不合理导致资源配置与转换效率低,内部管理有待加强;进一步根据纯技术效率和规模效率将样本企业划分为5种类型。以此提出提高信息技术服务企业创新效率的建议。     

VBA技术在医院门诊收费管理系统中的应用

介绍了医院门诊管理系统软件中医院门诊计算过程采用数据交换和自动输出功能实现的技术原理及编程方法:应用VBA技术对Excel文件分别进行后台操作,然后实现两者文件的合并,统一以Word文件的形式输出。这对其他具有报表输出功能的软件系统开发有一定的参考价值。     

Stimation of reference interval of lipid profile in Assamese population

12hrs fasting samples of 1485 apparently healthy, Assamese population in the age group of 20–80 yrs., mostly from the urban area of Assam were tested for serum lipid profile that includes total cholesterol, triacylglycerol, high density lipoprotein cholesterol (HDL-C), low density lipoprotein cholesterol (LDL-C) and very low density lipoprotein cholesterol (VLDL-C) over a period of three years. The values (median and range in mg/dl) obtained were 170 (93–263); 110 (40–256); 40 (23–73); 103 (40–173) and 22 (8–51) respectively. After grouping these subjects according to the age and sex no significant difference were observed between most of the groups. Median and upper range of total cholesterol, HDL-C and LDL-C were found to be higher in women than in men in all the age groups. But triacylglycerol and VLDL-C concentrations were observed to be higher in the men than women except in age group of 61–70 yrs. It can be suggested that lipid values obtained in this study can be used as the reference value, based on which clinical correlation can be made.     

绿色工艺创新如何提升企业绩效？ ——基于智力资本的多重中介和组织冗余的调节效应

双碳战略下,为推动引导企业绿色发展以提升企业价值,以2013—2019年我国209家上市制造企业相关面板数据为样本,探讨绿色工艺创新通过影响智力资本及其构成要素（人力资本、结构资本和关系资本）提升企业绩效的路径,以及组织冗余在其中的调节效应。研究结果显示：（1）绿色工艺创新对企业绩效具有显著促进作用;（2）人力资本、结构资本在绿色工艺创新与企业绩效间发挥部分中介作用,且中介效应存在差异;（3）绿色工艺创新对企业绩效的直接预测作用受到未吸收冗余的正向调节,但未受到已吸收冗余的调节效应影响。