Approximate optimal AUTOSAR software components deploying approach for automotive E/E system

The AUTOSAR has been developed as the worldwide standard for automotive E/E software systems, making the electronic components of different suppliers to be employed universally. However, as the number of component-based applications in modern automotive embedded systems grows rapidly and the hardware topology becomes increasingly complex, deploying such large number of components in automotive distributed system in manual way is over-dependent on experience of engineers which in turn is time consuming. Furthermore, the resource limitation and scheduling analysis make the problems more complex for developers to find out an approximate optimal deploying approach in system integration. In this paper, we propose a novel method to deploy the AUTOSAR components onto ECUs with the following features. First, a clustering algorithm is designed for deploying components automatically within relatively low time complexity. Second, a fitness function is designed to balance the ECUs load. The goal of our approach is to minimize the communication cost over all the runnable entities while meeting all corresponding timing constraints and balancing all the ECUs load. The experiment results show that our approach is efficient and has well performance by comparing with other existing methods in specific and synthetic data set.     

短线匹配法预制拼装技术及其工程应用

短线匹配法节段预制拼装技术是将整孔箱梁设计成若干个标准节段,工厂内逐节段匹配预制,架桥机现场拼装的施工技术。该项技术1965年最早出现在法国,在国外得到了广泛应用。2002年自苏通大桥开始,我国逐步实现了短线匹配法的大规模应用以及设计、施工、装备、材料等技术的全面国产化。结合我国已建成的几座代表性的短线匹配法桥梁工程,对短线匹配法节段预制拼装的接缝质量控制、线形控制及长期性能保证等关键要点进行了论述,对短线匹配法施工技术应用中存在的问题及未来发展趋势进行了初步分析。     

Modeling research on manufacturing execution system based on large-scale system cybernetics

A cybernetics model of manufacturing execution system(MES CM) was proposed and studied from the viewpoint of cybernetics.Combining with the features of manufacturing system, the MES CM was modeled by"generalized modeling"method that is discussed in large-scale system theory.The mathematical model of MES CM was constructed by the generalized operator model, and the main characteristics of MES CM were analyzed.     

A data model applied to the knowledge-based ICAS

Image-guided computer aided surgery system (ICAS) contributes to safeness and success of surgery operations by means of displaying anatomical structures and showing correlative information to surgeons in the process of operation. Based on analysis of requirements for ICAS, a new concept of clinical knowledge-based ICAS was proposed. Designing a reasonable data structure model is essential for realizing this new concept. The traditional data structure is limited in expressing and reusing the clinical knowledge such as locating an anatomical object, topological relations of anatomical objects and correlative clinical attributes. A data structure model called mixed adjacency lists by octree-path-chain (MALOC) was outlined, which can combine patient's images with clinical knowledge, as well as efficiently locate the instrument and search the objects' information. The efficiency of data structures was analyzed and experimental results were given in comparison to other traditional data structures. The result of the nasal surgery experiment proves that MALOC is a proper model for clinical knowledge-based ICAS that has advantages in not only locating the operative instrument precisely but also proving surgeons with real-time operation-correlative information. It is shown that the clinical knowledge-based ICAS with MALOC model has advantages in terms of safety and success of surgical operations, and help in accurately locating the operative instrument and providing operation-correlative knowledge and information to surgeons in the process of operations.     

Analysis and improvement of authenticatable ring signcryption scheme

We show that the Zhang-Yang-Zhu-Zhang identity-based authenticatable ring signcryption scheme is not secure against chosen plaintext attacks.Furthermore, we propose an improved scheme that remedies the weakness of the Zhang-Yang-Zhu-Zhang scheme.The improved scheme has shorter ciphertext size than the Zhang-Yang-Zhu-Zhang scheme.We then prove that the improved scheme satisfies confidentiality, unforgeability, anonymity and authenticatability.     

Power network parameter estimation method based on data mining technology

The parameter values which actually change with the circumstances, weather and load level etc.produce great effect to the result of state estimation. A new parameter estimation method based on data mining technology was proposed. The clustering method was used to classify the historical data in supervisory control and data acquisition (SCADA) database as several types. The data processing technology was impliedto treat the isolated point, missing data and yawp data in samples for classified groups. The measurement data which belong to each classification were introduced to the linear regression equation in order to gain the regression coefficient and actual parameters by the least square method. A practical system demonstrates the high correctness, reliability and strong practicability of the proposed method.     

氧化苦参碱对慢性肾脏病患者血清TGF-β1和Col Ⅲ的影响

目的观察氧化苦参碱对慢性肾脏病(CKD)患者血清转化生长因子-β1(TGF-β1)、Ⅲ型胶原(ColⅢ)的影响,探讨其在肾间质纤维化发生发展过程中的作用和治疗价值。方法选取健康对照者10例、慢性肾脏病患者40例,根据肾小球滤过率(GFR)分为轻度肾损害组(GFR<90 mL/min.1.73 m2,CKDⅠ)、中重度肾损害组(GFR<60 mL/min.1.73 m2,CKDⅡ),再分层随机抽样,分为常规治疗组和氧化苦参碱组。利用双抗体夹心酶联免疫吸附法分别检测各研究对象治疗前、后血清TGF-β1、ColⅢ含量,采用t检验比较两组TGF-β1、ColⅢ水平的差异。结果氧化苦参碱组TGF-β1、ColⅢ含量显著低于常规治疗组(P<0.05)。结论氧化苦参碱可能通过下调TGF-β1、ColⅢ水平,减少ECM沉积,从而达到防止肾间质纤维化的作用。     

饲料加硼对摄入过量氟的实验大鼠骨损伤的预防作用

目的探讨饲料加硼对过量氟摄入的大鼠骨损伤的预防作用。方法24只4-5周龄Sprague-Dawley(SD)大鼠分为:对照组(喂饲基础饲料,饮蒸馏水)、过量氟组[喂饲基础饲料,饮含100mg/LF-(氟化钠221mg/L的蒸馏水)]、硼预防组(喂饲加硼饲料,饮含100mg/LF-的蒸馏水)。实验3月后测量大鼠血清氟、硼含量及血清碱性磷酸酶(alkaline phosphatase,AKP)活性、骨氟和骨总RNA含量、胫骨纵径横径和干重及骨密度(bone mineral density,BMD),并检测大鼠股骨生物力学特性。结果和对照组比较,过量氟组大鼠血清氟、骨氟含量和血清AKP活性显著增高;骨总RNA含量、全身骨骼平均BMD和胫骨BMD降低;胫骨纵径、横径和干重减小;股骨最大负荷减低,最大形变增加。相比过量氟组,硼预防组大鼠血清氟和骨氟含量及AKP活性明显下降;骨总RNA含量、全身骨骼平均BMD、腰椎和胫骨BMD显著增高;胫骨纵径、横径和干重,股骨最大负荷明显增加。3组大鼠血清硼含量无显著性差异。结论大鼠摄入过量氟可出现明显的骨损伤,饲料加硼对此有一定的预防作用。     

摊铺机振捣装置的动力学仿真分析

利用Pro/E软件建立某型摊铺机振捣装置的三维虚拟样机模型。利用Adams软件的相关模块对摊铺机振捣装置进行三维动力学仿真试验,分析振捣频率和振捣装置行程对机器工作的影响,建议在实际施工中选择振捣装置的振捣频率不宜超过25 Hz,行程以6 mm为宜。