Indoor GPS技术及其在工业领域中的应用

Indoor GPS技术是在GPS技术原理启发下开发的用于室内精密定位的测量系统.详细介绍了Indoor GPS技术的测量原理和系统组成,从基础设施、测量阵列、简单测量、复杂测量、局域改正以及实时协作等方面对Indoor GPS及GPS进行了分析和比较.最后介绍了其在航空航天、汽车船舶以及工业测量等领域的具体应用情况.     

节水型简易公共汽车洗车台

我公司自行设计建造的适合于小型公交停车场使用的节水型简易洗车台,具有投资少、节约用水和便于维护等优点. 1 总体设计方案 本洗车台采用人工清洗方式进行车辆外表和底盘的清洗.清洗车辆外表时,使用毛刷、清水清洗;清洗底盘将车辆停在地沟上,用具有一定压力的水流冲洗.     

基于petri网的电控发射系统可靠性评估

以气动不平衡式鱼雷发射装置电控发射系统作为研究对象,针对电控发射系统的电控序列建立了petri网,得到标识可达树仿真结果,并以此对电控发射系统的可靠性进行分析评估.     

Design and evaluation of a hierarchical control architecture for an autonomous underwater vehicle

This paper researches on a kind of control architecture for autonomous undelwater vehicle （AUV）. After describing the hybrid property of the AUV control system, we present the hierarchical AUV control architecture. The architecture is organized in three layers： mission layer, task layer and execution layer. State supervisor and task coordinator are two key modules handling discrete events, so we describe these two modules in detail. Finally, we carried out a series of tests to verify this architecture The test results show that the AUV can perform autonomous missions effectively and safely. We can conclude the control architecture is valid and practical.     

评析新《会计法》的实施基础及经济后果

随着改革的深化、开放的扩大和社会主义市场经济的发展，现行《会计法》已难以适应变化了的形势和国家加强宏观经济调控的要求，需要进行修改。主要表现在：     

A High-performance Low Cost Inverse Integer Transform Architecture for AVS Video Standard

A high-performance, low cost inverse integer transform architecture for advanced video standard (AVS) video coding standard was presented. An 8×8 inverse integer transform is required in AVS video system which is compute-intensive. A hardware transform is inevitable to compute the transform for the real-time ap-plication. Compared with the 4×4 transform for H.264/AVC, the 8×8 integer transform is much more complex and the coefficient in the inverse transform matrix Ts is not inerratic as that in H.264/AVC. Dividing the Ts into matrix S8 and R8, the proposed architecture is implemented with the adders and the specific CSA-trees instead of multipliers, which are area and time consuming. The architecture obtains the data processing rate up to 8 pixels per-cycle at a low cost of area. Synthesized to TSMC 0.18 μm COMS process, the architecture attains the operating frequency of 300 MHz at cost of 34 252 gates with a 2-stage pipeline scheme. A reusable scheme is also introduced for the area optimization, which results in the operating frequency of 143 MHz at cost of only 19 758 gates.     

世界钻井船市场发展现状

从钻井船的船龄结构、建造年份、船东、运营商、建造商,设计型式、作业水域、工作水深、钻井深度等方面论述了钻井船市场现状,展望了钻井船市场的未来发展。指出虽然在未来一两年内世界钻井船新船订造市场仍可能较为谨慎,但由于未来世界深海油气的开采对于钻井船的大量需求,钻井船建造市场的长期走势仍值得期待。     

Mainstream Encounters the Dilemma Posed by Non-main Stream

In 2009,the global shipping and shipbuilding markets are loitering around in the"coldest winter".Though they display better than we image after"big adjustment"of stagnate,no obvious resuscitation has been seen,and the mainstream position of shipbuilders,shipowners and ship type in fOrmer days is also changing.     

广西山区公路填石路堤路床用料的探讨

本文根据广西山区石山地区公路施工的特点,结合实际施工经验分析探讨石山地区填石路堤用料的使用情况,从技术,经济,环保的角度阐述了用碎石作为填石路堤路床用料的可行性。     

Test Scenario Design for Intelligent Driving System Ensuring Coverage and Effectiveness

Intelligent vehicle greatly benefits traffic safety, efficiency and driving comfortable. With the development of intelligent driving technology and its application, it is becoming increasingly important to do effective and comprehensive tests before putting on the market. Comprehensively considering the cost of test, an automatic generation method of test scenarios is proposed to ensure both coverage and effectiveness. Based on the analyzed key infuence factors of an intelligent driving system, the analytic hierarchy process (AHP) is used to determine their importance and accordingly an complex index is defined, based on which an improved test case generation algorithm based on the pairwise independent combinatorial testing tool (PICT) is proposed to ensuring both combinational coverage and complexity of test cases. Finally, the test scenario is generated by clustering these discrete test cases considering similarity and complexity. The high complex test cases are preferred to be combined together and conducted preferentially to increase the test efficiency. The effectiveness of this method is validated by applying it on a lane departure warning system (LDW).