虚拟制造组织中服务定位机制研究

提出一种基于公共对象请求代理结构(Common Object Request Broker Architecture,CORBA)的多自主体系统(Multi-agent System,MAS)体系结构作为虚拟制造组织(Virtual Manufacturing Organization,VMO)的组织框架和信息基础设施,以跨越成员企业之间在位置、网络、协议、平台、语言以及数据结构和类型等方面的异构性,实现在语义和应用层上的互操作。在此基础上提出一种基于中间Agent的服务定位机制(Setvice Location Mechanism,SLM),以支持虚拟制造组织的构建以及成员企业间的通信、互操作和资源／服务共享,并在开发的VMO概念原型系统上进行了实现和验证。     

A Distributed Privacy Preservation Approach for Big Data in Public Health Emergencies Using Smart Contract and SGX

Security and privacy issues have become a rapidly growing problem with the fast development of big data in public health. However, big data faces many ongoing serious challenges in the process of collection, storage, and use. Among them, data security and privacy problems have attracted extensive interest. In an effort to overcome this challenge, this article aims to present a distributed privacy preservation approach based on smart contracts and Intel Software Guard Extensions (SGX). First of all, we define SGX as a trusted edge computing node, design data access module, data protection module, and data integrity check module, to achieve hardware-enhanced data privacy protection. Then, we design a smart contract framework to realize distributed data access control management in a big data environment. The crucial role of the smart contract was revealed by designing multiple access control contracts, register contracts, and history contracts. Access control contracts provide access control methods for different users and enable static access verification and dynamic access verification by checking the user’s properties and history behavior. Register contract contains user property information, edge computing node information, the access control and history smart contract information, and provides functions such as registration, update, and deletion. History contract records the historical behavior information of malicious users, receives the report information of malicious requestors from the access control contract, implements a misbehavior check method to determines whether the requestor has misbehavior, and returns the corresponding result. Finally, we design decentralized system architecture, prove the security properties, and analysis to verify the feasibility of the system. Results demonstrate that our method can effectively improve the timeliness of data, reduce network latency, and ensure the security, reliability, and traceability of data.     

基于改进遗传算法的自动拣选系统 拣选位分配建模与优化

针对某自动拣选系统建立了拣选位分配优化模型,以拣选时间模型作为适应度函数,并通过判断海明距离添加一个惩罚函数对遗传算法进行了改进,对算例进行仿真实验,可以得到货位排序优化后,总拣选时间明显降低了27.85%。结果表明,货物拣选位的分配对自动拣选系统的拣选效率有很大的影响。要想降低总拣选时间,提高自动拣选系统的拣选效率,不能只考虑个别种类货物的位置分配,要从全局的方向去考虑。该研究对配送中心如何提高自动拣选系统的效率提供了理论支持。     

21世纪人才资源配置模式及其运行系统研究

探讨了人才资源市场化的配置机制、构成要素及运行条件，并提出21世纪我国人才资源的市场化配置模式，讨论了新世纪人才资源配置的政府支持体系及信息共享系统。为我国政府实施人才资源市场化配置提供参考。     

Fast Marching Method for Microseismic Source Location in Cavern-Containing Rockmass: Performance Analysis and Engineering Application

Microseismic (MS) event locations are vital aspect of MS monitoring technology used to delineate the damage zone inside the surrounding rock mass. However, complex geological conditions can impose significantly adverse effects on the final location results. To achieve a high-accuracy location in a complex cavern-containing structure, this study develops an MS location method using the fast marching method (FMM) with a second-order difference approach (FMM2). Based on the established velocity model with three-dimensional (3D) discrete grids, the realization of the MS location can be achieved by searching the minimum residual between the theoretical and actual first arrival times. Moreover, based on the calculation results of FMM2, the propagation paths from the MS sources to MS sensors can be obtained using the linear interpolation approach and the Runge–Kutta method. These methods were validated through a series of numerical experiments. In addition, our proposed method was applied to locate the recorded blasting and MS events that occurred during the excavation period of the underground caverns at the Houziyan hydropower station. The location results of the blasting activities show that our method can effectively reduce the location error compared with the results based on the uniform velocity model. Furthermore, the obtained MS location was verified through the occurrence of shotcrete fractures and spalling, and the monitoring results of the in-situ multipoint extensometer. Our proposed method can offer a more accurate rock fracture location and facilitate the delineation of damage zones inside the surrounding rock mass.     

Service Innovativeness and Innovation Success in Technology-based Knowledge-Intensive Business Services: An Intellectual Capital Approach

This paper analyzes the influence of the three components of intellectual capital (human, social and organizational) and intensity in collaboration with clients on service innovativeness in knowledge-intensive business services (KIBS). It also includes a discussion on the impact of both service innovativeness and intensity in collaboration with clients on innovation success. An empirical study is conducted on a sample of companies belonging to two technology-based KIBS industries: software and R&D services. The results suggest that the positive effect of human capital on service innovativeness is moderated by intensity in collaboration with clients, being human capital enhanced by organizational and social capital. The effect of social capital on service innovativeness is partially mediated by human capital and also moderated by intensity in collaboration with clients. Finally, service innovativeness positively affects innovation success, while intensity in collaboration with clients has a higher effect.     

服务设计的四个层次:交互、功能、组织创新与社会转型——以农业食物系统为例

随着我国服务经济的发展,服务设计受到越来越多的重视,专业设计机构将其视为创新的方向。然而,服务设计在产业中的运用与服务设计的教育研究之间,存在着明显的差距。将服务设计分为微观层面的交互/用户体验设计,中观层面向内的功能设计与向外的组织创新设计,以及宏观层面的,以改变服务组织所处环境为目标的社会转型设计。以农业食物系统中服务设计的现状为例,旨在对服务设计在这一具体领域中的四个层次上的发展特征进行分析。     

Extending LaMer's mechanism using open system for increasing forced and controlled growth of Au nano particles: Desired decreasing Fe3O4 nano particles size during simultaneous synthesis in optimized conditions

The most effective parameters were found to obtain Au/Fe₃O₄ nano particles (NPs)-oleylamine composite. Having Au NPs with the controlled maximum mean size under the forced conditions was the main aim of this study. We used the continuous flow rates of oleylamine 75% to produce Au NPs under an open system by extended LaMer mechanisms. This process decreased the mean size of Fe₃O₄ NPs synthesized simultaneously, by classic LaMer mechanism. The Fe₃O₄ NPs production was carried out without continuous adding of any iron reactant, viz. as a closed system. In the absence of gold ions, the mean size of the synthesized Fe₃O₄ NPs using 2.5 ml/min oleylamine was about 35.0 nm at 2.0 ± 0.5 °C after 120 min. This mean size was decreased to 27.2, 21.4, 16.8 and 8.7 nm, when Au NPs were simultaneous prepared using 0.5, 0.75, 1.5 and 2.5 ml/min of oleylamine, respectively, at the same conditions. Surface Plasmon Resonance (SPR) adsorption was used to evaluate Au NPs production at first 30 min, while Small Angle X-ray Scattering (SAXS) method was used to monitor the reaction progression for near-real time analysis of increasing the growth of Au NPs up to 280 min, at the optimum conditions. Changing the properties of Fe₃O₄ NPs during processes was determined by studying Magnetization, Potentiometric titration, Inductive heating and Zeta potential.