基于立体标定靶的扫描仪与数码相机联合标定

地面3维激光扫描仪是一种新型测量仪器,应用领域广泛。随着3维激光扫描技术和CCD传感器技术的不断发展,越来越多的3维激光扫描仪配有内置或者外置的数码相机。在对目标的描述上,点云和影像数据各有优势,扫描仪和数码相机的联合标定可为实现两者的优势互补提供基础。目前扫描仪和数码相机的联合标定主要是基于扫描区域的几何特性或者基于2维平面标定靶,这两种联合标定方法具有一定的局限性。这里在设计3维立体标定靶的基础上,提出了一种基于3维立体标定靶的联合标定方法。经过实验验证了联合标定方法的有效性和稳健性。     

MIMU/DGNSS组合导航技术在城市智能公交中的应用

为解决智能公交GPS在城市环境中易受干扰的问题,设计低成本MIMU和DGNSS松组合算法,并进行两类跑车实验。利用自编写的GNSS测试软件对该算法处理后的定位结果和高精度差分GNSS接收机的基准结果进行比对。实测结果表明,在城市复杂环境中该组合模块定位连续性达99.59%,其中75.68%在3 m以内,与传统GPS模块相比,在同样低成本的前提下提高定位结果精度和定位连续性、可靠性。     

新疆伽师地震的近场观测和对它的初步认识

1998年5月～7月中国地震局物探中心在伽师震区布置了一个40×50km2的三维地震观测台网,布置了19台轻便地震仪,在二个月的时间里接收到近700个地震事件,并接收了十一个炮点的人工地震资料.对天然地震资料进行了精确定位,震级大于26的地震计算了震源机制解,并进行了讨论.最后对伽师10次6级以上地震的震中位置及能量的释放过程以及与坷坪断裂的关系进行了初步探讨     

Effects of temperature fluctuations on cuttlebone formation of cuttlefish Sepia esculenta

The morphological characteristics and the cuttlebone formation of Sepia esculenta exposed to different water temperature fluctuations were investigated under laboratory conditions. Temperature fluctuation cycles (15 cycles, 60 d in total) consisted of the following three regimes of 4 d duration: keeping water temperature in 26°C for 3 d (Group A), 2 d (Group B), 0 d (Group C, control); then keeping water temperature in 16°C for the next 1, 2, 4 d. No significant difference in the survival rate was observed between the control and temperature fluctuation groups (P>0.05). Lamellar depositions in a temperature fluctuation cycle were 2.45±0.02 for Group A, 2.00±0.02 for Group B, and 1.78±0.02 for Group C (P<0.05). The relationship between age and number of lamellas in the cuttlebone of S. esculenta under each water temperature fluctuation could be described as the linear model and the number of lamellas in the cuttlebone did not correspond to actual age. Group A had the highest cuttlebone growth index (CGI), the lowest locular index (LI), and inter-streak distances comparing with those of control group. However, the number of lamellas and LI or CGI showed a quadratic relationship for each temperature fluctuation group. In addition, temperature fluctuations caused the breakage of cuttlebone dark rings, which was considered a thermal mark. The position of the breakage in the dark rings was random. This thermal mark can be used as supplementary information for marking and releasing techniques.     

典型农区农用地承包经营权流转价格及对策研究(英文)

河南既是农业大省又是中国重要的粮食主产区,农用地流转顺畅及适度规模经营对区域经济发展和国家粮食安全产生重要影响。借助于土地使用权评估的基本方法,并使用土地承包经营权的权属特性进行修正,构建了土地承包经营权流转价格模型,并对典型区域沁阳市西万村进行了实证分析。结果表明,土地承包经营权流转价格应该包括经济价格、社会价格和修正价格。价格模型的应用,应甄别理论价格和实际流转费用的区分,农用地流转后经营项目没有转变,流转价格为经济价格和社会保障价格是总和。农用地流转后经营项目发生转变,比如耕地改种经济作物,流转价格则是经济价格、社会价格与修正价格三者的总和。收益分配格局存在复杂性,流转收益应在流出方、流入方、管理者和所有者之间合理、公平分配。政府应建立合理有序的农用地承包经营权流转市场,并以农用地流转市场为载体,构建农用地流转价格体系。     

Statistical diagnosis and gross error test for semiparametric linear model

This paper systematically studies the statistical diagnosis and hypothesis testing for the semiparametric linear regression model according to the theories and methods of the statistical diagnosis and hypothesis testing for parametric regression model. Several diagnostic measures and the methods for gross error testing are derived. Especially, the global and local influence analysis of the gross error on the parameter X and the nonparameter s are discussed in detail; at the same time, the paper proves that the data point deletion model is equivalent to the mean shift model for the semiparametric regression model. Finally, with one simulative computing example, some helpful conclusions are drawn.     

Spatial decision support applications based on three-dimensional city models

The basic mathematic models, such as the statistic model, the time-serial model, the spatial dynamic model etc., and some typical analysis methods based on 3DCM are proposed and discussed. A few typical spatial decision making methods integrating the spatial analysis and the basic mathematical models are also introduced, e.g. visual impact assessment, dispersion of noise immissions, base station plan for wireless communication. In addition, a new idea of expectation of further applications and add-in-value service of 3DCM is promoted. As an example, the sunshine analysis is studied and some helpful conclusions are drawn.     

Allowance of lateral breakthrough error for super long tunnels from 20km to 50km

Up to now there is no specification about the allowance of lateral breakthrough error for super long tunnel from 20 km to 50 km. On the basis of the design of GPS networks located outside and inside tunnel traverse network, we propose a method for calculating the influence value caused by control surveying errors. Through a lot of simulative calculations and combination with piercing practice of super tunnels in Wan Jiazai Project, Shanxi province, we present an allowance table of lateral breakthrough error for super long tunnels from 20 km to 50 km.     

新疆坡十铜镍硫化物含矿岩体岩浆源区特征及构造背景探讨

新疆坡北辉长岩体位于塔里木古陆东北缘的北山裂谷带中,坡一和坡十铜镍硫化物含矿超镁铁岩体位于坡北岩体内.尽管坡十超镁铁岩体与坡北辉长岩呈侵入接触,但两者的微量元素和同位素组成显示良好 的一致性,表明两岩相虽然分不同阶段侵入就位,但仍为同源岩浆的产物.MnO-TiO2-R2O5及Th-Hf-Ta判别图解显示坡北及坡十岩体的...