数字化测图的质量控制

随着测绘科学技术的发展，数字化测图已经逐步替代了传统的模拟测图法．本文结合自己的工作体会，总结了AutoCAD、全站仪在数字化测图中的运用技术，结合工作中的实例作了简略的阐述，对数字化成图的质量如何控制进行讨论。     

全数字化测图的几点体会

阐述了数字化测图的作业方法、数据信息的综合利用及相应的观点。     

应用数字化测图的几点体会

文章简要阐述了数字化测图的概念、特点以及所引起的行业变革.探讨了从数字化测图的数据采集、数据处理和数据输出到图形编辑处理、成果与图形输出的作业流程方法及工作中的注意事项和工作中的体会与思考,展望了数字化成图的发展优势和前景.     

数字化测图技术在违法占地测绘中的应用

文章以工程实例为基础,阐述了现代测量技术在违法占地测绘中的施测方法.对于国土部门掌握违法用地情况,从而对责任单位和责任人做出行政处罚的提供了有力证据.方法的采用,使得数据更加准确,做到有的放矢.     

工程测量中GPS控制测量平面与高程精度分析

在工程测量中应用GPS控制测量平面的方式可以有效地保证在其测量过程中,不受气候影响,也不受其地形限制,并且保证其测量的结果具有速度快、精准度高的效果。对此,它非常符合当前阶段所需求的科学化测量标准。但是,由于现阶段网络资源并不是十分的理想,在实际的应用测量过程中就会发现,高程精度具有较大的误差值,这就导致了测量的结果具有一定的误差。因此,本文主要通过分析在应用GPS控制测量的过程中,高程精度会产生误差的原因和解决的措施。     

RTK加密控制测量在矿图数字化测绘中的应用研究

为解决传统矿图数字化测绘相邻点之间的距离中误差高的问题,基于RTK加密控制测量设计矿图数字化测绘方法。通过引入PDOP位置精度因子,采集矿图数字化测绘数据,基于RTK加密控制测量,处理矿图数字化测绘数据,建立矿图数字化测绘数据3D绘图协议,实现矿图数字化测绘。设计实例分析,结果表明,设计测绘方法测绘相邻点之间的距离中误差明显低于对照组,能够解决传统矿图数字化测绘相邻点之间的距离中误差高的问题。     

提高大比例尺地形图施测精度的一种方法

提出利用直角坐标刻划网格图测图的方法。该方法将直角坐标刻划网格图放在聚酯薄膜图纸下。利用薄膜的透明性进行映绘展点．并将每幅图左下角图廓点作为图上坐标展点零点(原点)，利用小型计算器按比例尺输出展点坐标．其展点方法不受图幅坐标限制．便于熟练掌握。该方法简捷、精度高，有应用价值。     

电流互感器准确级解析及应用

介绍了电流互感器的误差产生、基本原理及准确级特性的概念,阐述了对测量用电流互感器、保护用电流互感器准确级的不同应用范畴,并结合工程应用实践对电流互感器的设计选择进行了总结。     

变送器的量程比与精确度

大量程比的变送器在量程可调范围内的指标精确度与实际使用精 度可能相差很大，这个问题应该引起设计人员及用户注意。     

Accuracy and generalizability of an automated MMPI interpretation system: Erratum.

Reports an error in the article entitled "Accuracy and Generalizability of an Automated MMPI Interpretation System," by David Lachar (Journal of Consulting & Clinical Psychology. Vol. 42(2) Apr 1974, 267-273). Three references to tables on p. 270 appeared incorrectly. The sentences should read as follows: In column 1, the last sentence should read: A distribution of the frequency of the 51 code paragraphs is presented in Table 3. The second sentence under the paragraph heading Narrative Accuracy should read: The distribution of these 1,410 ratings appears in Table 4. The first sentence in Paragraph 2 should read: Table 1 presents the levels of the six variables included in the linear regression analysis of variance of overall narrative ratings. (The following abstract originally appeared in record 1974-27670-001). Evaluated narrative paragraph types and total reports of a new MMPI clinical interpretation simulation program. Complete documentation of this system and notation of accuracy and frequency of individual statements are provided elsewhere. MMPI interpretations of 1,410 patients who received psychiatric evaluations were judged by the clinicians who saw these patients. 107 paragraphs appeared 7,555 times and were rated inaccurate less than 10% of the time. 91% of these reports received overall favorable ratings. A linear regression analysis of variance of overall narrative ratings with 2 narrative and 4 patient variables suggested that this system has considerable generalizability. Narrative Type * Patient Source and Patient Age * Patient Source interactions are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Accuracy and variability of information sources as determiners of performance and source preference orf decision makers.

9 different information sources were examined to determine the relative effects of source accuracy, source variability, and objective expected value upon the source preferences of decision makers. The 9 sources of information were created by using all combinations of 3 levels of mean accuracy of information and 3 levels of error variability. Preference for an information source was shown to be related to both the accuracy of a measure and its variability, with the former appearing to be the most rapidly recognized of the 2. In addition, the objective expected value of a source (as determined by the payoff system used) accounted for nearly all of the variance in group performance. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

陕西峰崖铅锌矿通风井贯通测量实施与精度评定

贯通测量工作是矿山测量工作中的一项重要工作,贯通工程质量的好坏,关系到整个矿山的建设、生产和经济效益。本文介绍了峰崖矿山通风井贯通测量的实施过程以及精度情况介绍,总结经验,对以后的贯通测量工作有一定的指导意义。     

Accuracy, confidence, and calibration: How young children and adults assess credibility.

Do children and adults use the same cues to judge whether someone is a reliable source of information? In 4 experiments, we investigated whether children (ages 5 and 6) and adults used information regarding accuracy, confidence, and calibration (i.e., how well an informant's confidence predicts the likelihood of being correct) to judge informants' credibility. We found that both children and adults used information about confidence and accuracy to judge credibility; however, only adults used information about informants' calibration. Adults discredited informants who exhibited poor calibration, but children did not. Requiring adult participants to complete a secondary task while evaluating informants' credibility impaired their ability to make use of calibration information. Thus, children and adults may differ in how they infer credibility because of the cognitive demands of using calibration. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Places and faces: Geographic environment influences the ingroup memory advantage.

The preferential allocation of attention and memory to the ingroup (the ingroup memory advantage) is one of the most replicated effects in the psychological literature. But little is known about what factors may influence such effects. Here the authors investigated a potential influence: category salience as determined by the perceiver’s geographic environment. They did so by studying the ingroup memory advantage in perceptually ambiguous groups for whom perceptual cues do not make group membership immediately salient. Individuals in an environment in which a particular group membership was salient (Mormon and non-Mormon men and women living in Salt Lake City, Utah) showed better memory for faces belonging to their ingroup in an incidental encoding paradigm. Majority group participants in an environment where this group membership was not salient (non-Mormon men and women in the northeastern United States), however, showed no ingroup memory advantage whereas minority group participants (Mormons) in the same environment did. But in the same environment, when differences in group membership were made accessible via an unobtrusive priming task, non-Mormons did show an ingroup memory advantage and Mormons’ memory for ingroup members increased. Environmental context cues therefore influence the ingroup memory advantage for categories that are not intrinsically salient. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effectiveness of Early Screening for Externalizing Problems: Issues of Screening Accuracy and Utility.

Accurate, early screening is a prerequisite for indicated interventions intended to prevent development of externalizing disorders and delinquent behaviors. Using the Fast Track longitudinal sample of 396 children drawn from high-risk environments, the authors varied assumptions about base rates and examined effects of multiple-time-point and multiple-rater screening procedures. The authors also considered the practical import of various levels of screening accuracy in terms of true and false positive rates and their potential costs and benefits. Additional research is needed to determine true costs and benefits of early screening. However, the results indicate that 1st grade single- and multiple-rater screening models effectively predicted externalizing behavior and delinquent outcomes in 4th and 5th grades and that early screening is justified. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

提高地矿测试结果准确性的做法与细节问题分析

在地矿测试工作中,测试结果的准确性随着测试技术的升级也在不断提高,但不可忽视依旧存在部分问题,这种测试不准确问题可从多个角度入手进行分析,包括测试过程中的各个环节,由于环境因素、技术手段、主观因素等多种可能性影响,都会造成测试结果准确性的偏差。为了较好的改善这种情况,提高地矿测试结果准确性,本文进行具体分析,优化测试手段与内容。