钢结与Al2O3、SiC复相陶瓷硬质合金的研究

本文研究了Al2O3、SiC加入量不同、加入稀土后以及热处理与钢结硬质合金力学性能的关系。采用SPS烧结、测定密度、硬度和耐磨性等,进行了金相、数据分析。结果表明,加入Al2O3、SiC、稀土后有良好的强化效果,热处理后使力学性能进一步提高。     

浅谈陶瓷装饰的设计原理

一件完美的陶瓷作品，往往是通过装饰完成的，因此，陶瓷装饰能使陶瓷作品达到更加完美的重要手段。如何使装饰与造型有机结合，达到形式与内容的和谐统一呢？本人通过多年的教学和实践，总结出一些规律，提供同行们参考。     

潮州陶瓷产业集群复杂网络研究

根据潮州陶瓷产业近年来的相关统计数据,构建潮州陶瓷产业复杂网络拓扑图,通过对潮州陶瓷产业复杂网络统计特征的分析,从复杂网络的视角研究在内外部环境作用下潮州陶瓷产业向更高一级形态演进的规律,为潮州陶瓷产业的发展提供积极的理论支持。     

陶瓷酒具设计要求及未来发展方向

酒具是酒文化的载体,随着人民生活品质的提高,酒具的设计题材也在不断的丰富发展中,酒具从最初的简单、实用为目的发展到现在丰富多彩,功能各异,酒具行业也在发生翻天覆地的变化。在这样的情况下,我国陶瓷酒具行业企业如何进行创新设计,如何针对自身特点结合当前形势,设计出有创新意义,独具特色的酒具,这应该是陶瓷酒具设计、酒具行业在未来发展的关键。综合分析中外多种名酒及各类酒具,对中国陶瓷酒具未来发展趋势进行大胆分析、预测,为酒具设计创新提供新思路。     

陶瓷造物的设计与艺术研究

中国陶瓷文化有着久远的历史,它是实用功能性与观赏艺术性的完美结合,所以陶瓷造物便涉及了设计与艺术两大体系。在陶瓷造物中,由于发展历程、功能体现、思维方式和制作模式的不同,出现了陶瓷设计与陶瓷艺术两大分支。本文通过对陶瓷设计与陶瓷艺术的研究与调查,丰富和完善了设计学及艺术学的理论,并进一步探索了科学的陶瓷设计与陶瓷艺术人才培养模式。     

陶瓷造物的设计与艺术研究

中国陶瓷文化有着久远的历史,它是实用功能性与观赏艺术性的完美结合,所以陶瓷造物便涉及了设计与艺术两大体系。在陶瓷造物中,由于发展历程、功能体现、思维方式和制作模式的不同,出现了陶瓷设计与陶瓷艺术两大分支。本文通过对陶瓷设计与陶瓷艺术的研究与调查,丰富和完善了设计学及艺术学的理论,并进一步探索了科学的陶瓷设计与陶瓷艺术人才培养模式。     

我国古代手工陶瓷灯具的设计特征

本文通过叙述我国历代陶瓷灯具的设计特征,来表现我国古代劳动人民的智慧结晶,他们给我们留下的宝贵财富是我们振兴手工陶瓷灯具的源泉。     

我国古代手工陶瓷灯具的设计特征

本文通过叙述我国历代陶瓷灯具的设计特征,来表现我国古代劳动人民的智慧结晶,他们给我们留下的宝贵财富是我们振兴手工陶瓷灯具的源泉。     

电厂煤粉管道耐磨陶瓷弯头技术的设计原理及优点

火力发电厂的煤粉管道因受严重的煤粉磨损,现电厂采用氧化铝耐磨陶瓷弯头防止磨损.此方法已经得到很多电厂认可并得以推广.     

Integration of complex objects and transitive relationships for information retrieval

In this paper we show that in advanced information retrieval (IR) applications capabilities for data aggregation, transitive computation and NF² (non-first normal form) relational computation are often necessary at the same time. We demonstrate that complex objects are naturally modeled as NF² relations, whereas structures like hierarchical thesauri must be modeled for transitive computation. Transitive processing cannot be supported by structurally static structures like NF² relations. We present a truly declarative query interface, which integrates data aggregation, transitive computation and NF² relational computation. Thus the interface supports the retrieval and structural manipulation of complex objects (e.g. documents and bibliographic references), their retrieval through transitive relationships (e.g. thesauri, citations) and data aggregation based on their components (e.g. citation counts, author productivity). Most importantly, users can formulate queries on a high abstraction level without mastering actual programming or database techniques.     

Configuring collective digital-technology usage in dynamic and complex design practices

Digital-technology usage in dynamic and complex work practices is a core phenomenon in innovation research. There are, however, few detailed analyses of how people organize the use of digital tools in their work practices. We aim to offer more insight into how individual actors use digital technology, how these actors organize its use in collectives, and how they organize their work with that of other actors in order to realize collective-level goals. We implemented a qualitative research design, based on interviews in architectural firms complemented with observations and archival data. By analyzing interactions of multiple individual actors with digital technology, we found that actors organize usage in collectives through activities that we call configuring-in-use and reflecting; and that they combine these two organizational activities in order to realize collective-level goals. We identify the combination of these organizational activities as configurational usage. We contribute to literature on the usage of pervasive digital technology by providing a detailed empirical investigation of organized usage of digital technology. Furthermore, we refine the conceptualization of configurational usage, improving understanding of core processes of digital innovation.     

利用多基因序列探讨稻属药稻复合体二倍体物种的系统发育关系

稻属药稻复合体Oryza officinalis complex中有5个二倍体物种，涉及B、C和E3个染色体组，分布在亚洲、非洲和大洋洲。其中，O.australiensis是稻属中惟一含E染色体组的物种;O.punctata则是惟一含B染色体组的物种。虽然O.officinalis、O.rhizomatis和O.eichingeri都含C染色体组，但由于它们间断分布在亚洲和非洲，可能在稻属异源多倍体成种中发挥了不同作用。染色体组B、C和E之间，以及上述二倍体物种之间的系统发育关系及其在稻属多倍体物种形成     

干系人私人关系、知识共享行为对复杂产品研发绩效的影响

在文献回顾的基础上,提出了干系人私人关系的三个构成:感情、人情和面子,探讨了干系人私人关系的三个构面、知识共享行为和复杂产品研发绩效之间的关系,构建了理论模型,并以复杂产品研发团队的干系人为调查对象对模型进行了实证研究。研究结果显示:干系人的感情、人情和面子均对知识共享行为有显著的正面影响,感情和面子对复杂产品研发绩效有显著正面影响,知识共享行为对复杂产品研发绩效有显著正面影响。此外,研究结果还表明,知识共享行为在人情和复杂产品研发绩效之间起到了完全中介作用;知识共享行为在感情和复杂产品研发绩效及面子和复杂产品研发绩效之间分别起到了部分中介作用。     

Zero-assignment and complex coefficient gain design of generalized proportional-integral observer for robust fault detection

Aiming at early detection of faults in dynamic systems subject to external periodic disturbances, this paper proposes a new generalized proportional-integral observer (GPIO) fault detection scheme with zero-pole joint optimization and novel complex coefficient gain (CCG) of residual evaluation. The focus of the proposed scheme is to reduce the adverse impacts caused by the semi-stationary periodic disturbance whose spectrum is uneven, with most energy being at some dominant frequencies. The proposed GPIO with a complex coefficient gain is designed in a two-stage procedure. In the first stage of zero assignment and pole optimization, the additional zeros introduced by the GPIO’s integration action are allocated to near the disturbance frequency. The gain of the transfer function matrix relating from the disturbances to the fault indicator signals is minimized by pole optimization. In the second stage of designing complex coefficient gain in residual evaluation, the unique feature of rank-deficient caused by the additional zeros assigned in stage one is further exploited to cancel the disturbances in the fault indicator signals (which is also referred to as the fault detection residual in this article). It is proved that, for an arbitrary periodic disturbance with a specific spectrum, the remnant components of the disturbance in the indicator signals generated by the GPIO can cancel each other by a complex gain vector, which can be determined by the zero eigenvalue’s left eigenvector of the rank-deficient of the disturbance transfer function matrix. The sufficient conditions for the convergence of the proposed fault detection filter are also given. Numerical examples illustrate the proposed method’s better performance in detecting minor faults.     

Finite-time and fixed-time synchronization of discontinuous complex networks: A unified control framework design

This paper is concerned with the finite-time and fixed-time synchronization of complex networks with discontinuous nodes dynamics. Firstly, under the framework of Filippov solution, a new theorem of finite-time and fixed-time stability is established for nonlinear systems with discontinuous right-hand sides by using mainly reduction to absurdity. Furthermore, for a class of discontinuous complex networks, a general control law is firstly designed. Under the unified control framework and the same conditions, the considered networks are ensured to achieve finite-time or fixed-time synchronization by only adjusting the value of a key control parameter. Based on the similar discussion, a unified control strategy is also provided to realize respectively asymptotical, exponential and finite-time synchronization of the addressed networks. Finally, the derived theoretical results are supported by an example with numerical simulations.     

Using compositional semantics and discourse consistency to improve Chinese trigger identification

Due to the special characteristics and challenges in Chinese language, event extraction in Chinese is much more difficult than that in English. In particular, the state-of-the-art Chinese event extraction systems suffer much from the low recall in trigger identification due to the failure in identifying unknown triggers and the inconsistency in identifying trigger mentions. To resolve these two issues, this paper proposes an inference mechanism to infer unknown triggers via the compositional semantics inside Chinese words and another inference mechanism to recover trigger mentions via the discourse consistency between Chinese trigger mentions. Here, various morphological structures are explored to better represent the compositional semantics inside Chinese triggers and automatically identify the head morpheme as the governing sememe of a trigger in inferring unknown triggers. Evaluation on the ACE 2005 Chinese corpus justifies the effectiveness of our approach over a strong baseline in Chinese event extraction, in particular trigger identification.     

Optimal synchronization controller design for complex dynamical networks with unknown system dynamics

In this paper, the optimal synchronization controller design problem for complex dynamical networks with unknown system internal dynamics is studied. A necessary and sufficient condition on the existence of the optimal control minimizing a quadratic performance index is given. The optimal control law consists of a feedback control and a compensated feedforward control, and the feedback control gain can be obtained by solving the well-known Algebraic Riccati Equation (ARE). Especially, in the presence of unknown system dynamics, a novel adaptive iterative algorithm using the information of system states and inputs is proposed to solve the ARE to get the optimal feedback control gain. Finally, a simulation example shows the effectiveness of the theoretical results.