POS辅助航空摄影测量多片直接对地目标定位的质量分析

以基于共线条件方程的空间前方交会理论为基础,建立POS辅助航空摄影测量的多片直接对地目标定位及其质量评价模型,并对摄自不同地区多种摄影比例尺的实际影像进行试验。试验结果表明:利用POS系统提供的影像外方位元素进行多片直接对地目标定位,完全能够满足我国现行规范对不同比例尺各种地形测绘的精度要求;并且,随着每航带交会影像数目和航带条数的增加,目标点的定位精度逐渐提高,多片直接对地目标定位的可靠性亦逐步提高。因此,利用POS系统提供的影像外方位元素进行多片直接对地目标定位时,综合考虑待定点在全测区内的所有成像影像是必要的。

让写话长成文章

从一年级下学期起,带着二（1）班的孩子们进行写话训练,以周记的形式开始,从最初的几句话,一段话,成长为洋洋数百言。且回溯一年多的写话之路,看它如何一周周成长,终于长成今天初具文章的模样,特为记。

Research on object-oriented SOC design methodology

The growing complexity of System on Chip （SOC） requres a system level specicanon and design approach. High-level languages such as C＋＋/SystemC can play multiple roles in system design as target languages. There are many practical problems in the application of object-oriented methods for this goal. Based on the analysis of traditional and system-level design methodology, a new object-oriented SOC design methodology with object-oriented design patterns is proposed, which emphasizes high-level design and verification. Aiming at the final goal of developing design patterns specific to SOC design, the reuse of design patterns in SOC systems and the capability of new SOC design patterns are discussed. With the illustration of some concrete examples of SOC design patterns, the application of object-oriented design methodology in the SOC design process is presented.

Research on Network-on-chip Dynamic and Adaptive Algorithm and Choice Strategy

With further increase of the number of on-chip device, the bus structure has not met the requirements. In order to make better communication between each part, the chip designers need to explore a new structure to solve the interconnection of on-chip device. The paper proposes a network-on-chip dynamic and adaptive algorithm which selects NoC platform with 2-dimension mesh as the carrier, incorporates communication energy consumption and delay into unified cost function and uses ant colony optimization to realize NOC map facing energy consumption and delay. The experiment indicates that compared with random map, single objective optimization can separately saves （30% - 47 %） and （ 20% - 39%） in communication energy consumption and execution time compared with random map, and joint objective optimization can further excavate the potential of time dimension in mapping scheme dominated by the energy.

Conversational Documentarianism in Instagram： Multidimensional Interface and Interactivity

What are the articulative semiotic characteristics of the Instagram interface, and how do they contribute to the construction of documentary, conversational photographic discourses with social purposes？ This is a semiotic analysis of the Instagram interface as an interactive and conversational platform in creating new photographic documentary strategies for social purposes, to which we have applied the model of textual conversation as outlined by Bettetini （1984） and the concept of multidimensional interactivity proposed by Sally McMillan （2006）. We shall analyse the work of Pachi Tamer （@cachafaz） in Instagram,and in particular the ＂Jim-Oktoberfest＂ case, the One-Dollar-Dreams site and the same author＇s ＂Sebasti^in＂ case from a semiotic perspective.

Computer-aided Visual Assessment of the Grade of Clothing Fit

The paper first introduces and analyzes the merits and demerits of some traditional methods of evaluating the grade of clothing fit. Then a computer-aided evaluating method is put forward. In this process two groups are needed. The control group is made up of people who wear maillot while the experimental group consists of those who wear target clothes to be evaluated. People in these two groups are taken photos respectively from front, back and lateral sides. The photos are input computer and receive a series of image processing using Open CV which provides the open source library function including image preprocessing, edge detection and image segmentation, etc. Finally, taking the clothing ease into account, the processed data is used for region matching and evaluating the grade of clothing fit.

只有理解了的东西才能深刻地感觉它 话说EEPROM(电可擦写可编只读存储器)(六)

5.故障的处理方法截然不同(1)对于I2C总线彩电",软件"

Flow Range Enhancement by Secondary Flow Effect in Low Solidity Circular Cascade Diffusers

High-pressure ratio and wide operating range are highly required for compressors and blowers. The technical issue of the design is achievement of suppression of flow separation at small flow rate without deteriorating the efficiency at design flow rate. A numerical simulation is very effective in design procedure, however, cost of the numerical simulation is generally high during the practical design process, and it is difficult to confn＇m the optimal design which is combined with many parameters. A multi-objective optimization technique is the idea that has been proposed for solving the problem in practical design process. In this study, a Low Solidity circular cascade Diffuser （LSD） in a centrifugal blower is successfully designed by means of multi-objective optimization technique. An optimization code with a meta-model assisted evolutionary algorithm is used with a commercial CFD code ANSYS-CFX. The optimization is aiming at improving the static pressure coefficient at design point and at low flow rate condition while constraining the slope of the lift coefficient curve. Moreover, a small tip clearance of the LSD blade was applied in order to activate and to stabilize the secondary flow effect at small flow rate condition. The optimized LSD blade has an extended operating range of 114 % towards smaller flow rate as compared to the baseline design without deteriorating the diffuser pressure recovery at design point. The diffuser pressure rise and operating flow range of the optimized LSD blade are experimentally verified by overall performance test. The detailed flow in the diffuser is also confirmed by means of a Particle Image Velocimeter. Secondary flow is clearly captured by PIV and it spreads to the whole area of LSD blade pitch. It is found that the optimized LSD blade shows good improvement of the blade loading in the whole operating range, while at small flow rate the flow separation on the LSD blade has been successfully suppressed by the secondary flow effect.

Comparative study on constructal optimizations of T-shaped fin based on entransy dissipation rate minimization and maximum thermal resistance minimization

The constructal optimizations of T-shaped fin with two-dimensional heat transfer model are carried out by finite element method and taking the minimization of equivalent thermal resistance based on entransy dissipation and the minimization of maximum thermal resistance as optimization objectives, respectively. The effects of the global parameter a (integrating the coefficient of convective heat transfer, the overall area occupied by fin and its thermal conductivity) and the volume fraction ? of fin on the minimums of equivalent thermal resistance and maximum thermal resistance as well as their corresponding optimal configurations are analyzed. The comparison of the results based on the above two optimization objectives is conducted. The results show that the optimal structures based on the two optimization objectives are obviously different from each other. Compared with the optimization result by taking the minimization of maximum thermal resistance as the objective, the optimization result by taking the equivalent thermal resistance minimization as the objective can reduce the average temperature difference in the fin obviously. The increases of a and ? can all improve the working status of local hot spot and the global heat transfer performance of the system. But the improvement effects of the increases of a and ? on the minimization of equivalent thermal resistance are different from those on the minimization of maximum thermal resistance. For either objective, the effect of a is different from that of ?. The T-shaped fin with minimum equivalent thermal resistance is much taller than that with minimum maximum thermal resistance; for either optimization objective, the stem of fin is thicker than the branches of fin, and the stem thickness is relatively close to branch thickness when the minimization of equivalent thermal resistance is taken as the optimization objective. The T-shaped fin with flat stem and slender branches can benefit the reduction of the maximum thermal resistance.