摘要：The complexity of a rock masses structure can lead to high uncertainties and risk during underground engineering *** tests on fractured rock-like materials containing a tunnel were conducted,and twodimensional particle flow models were *** principal stress and principal strain distributions surrounding the four-arc-shaped and inverted U-shaped tunnels were investigated,*** results indicated that the dip angle combination of preexisting fractures directly affects the principal stress,principal strain distribution and the failure characteristics around the *** larger the absolute value of the preexisting fracture inclination angle,the higher the crushing degree of compression splitting near the hance and the larger the V-shaped failure *** a decrease in the absolute value of the preexisting fracture inclination angle,the compressive stress concentration of the sidewall with preexisting fractures gradually *** types of cracks initiated around the four-arc-shaped tunnel and the inverted U-shape tunnel are *** the fractures are almost vertical,they have a significant influence on the stress of the sidewall force of the four-arc-shaped *** the fractures are almost horizontal,they have a significant influence on the stress of the sidewall of the inverted U-shaped *** findings provide a theoretical support for the local strengthening design of the tunnel supporting structure.

摘要：对于模糊系统中的否定知识的认识,首先从哲学层面上对潘正华提出的3种否定关系进行了研究,提出了矛盾否定关系、对立否定关系和中介否定关系的本质特征.接着,在Zadeh提出的语言变量中引入3种否定的概念,得到了带有3种否定的语言变量.为了能够刻画这些否定关系的本质特征和内在联系,进一步研究了它们的集合基础,定义了一种新的带有矛盾否定、对立否定和中介否定的模糊集GFScom,并讨论了GFScom的一些基本运算及性质.在此基础上,给出了基于GFScom的具有一阶逼近精度和二阶逼近精度的模糊系统的设计方法,并分析了所设计的模糊系统的逼近性能.应用示例表明,GFScom不仅丰富了模糊系统的推理功能,而且能在仅知道部分隶属函数分布的情况下设计出具有给定精度的模糊系统.

摘要：民间文学艺术作品法律保护立法滞后的现状威胁着人类文化的多元性及群体和民族的个性。历史和实证分析表明,民间文学艺术作品具有版权法意义上的作品性,版权保护应当是民间文学艺术作品法律保护中的核心手段。民间文学艺术作品的权利主体是多层次的。创作民间文学艺术作品的群体是原始的版权主体,传承人等相关主体则依其付出的劳动的性质获得相应的版权或其他权利。通过群体的代表或组织承担相应权益是民间文学艺术作品的集体版权实现的有效途径。应当针对民间文学艺术作品的特点构建相关的侵权行为和法律救济制度。

摘要：Entity recognition and disambiguation （ERD） is a crucial technique for knowledge base population and information extraction. In recent years, numerous papers have been published on this subject, and various ERD systems have been developed. However, there are still some confusions over the ERD field for a fair and complete comparison of these systems. Therefore, it is of emerging interest to develop a unified evaluation framework. In this paper, we present an easy-to-use evaluation framework （EUEF）, which aims at facilitating the evaluation process and giving a fair comparison of ERD systems. EUEF is well designed and released to the public as an open source, and thus could be easily extended with novel ERD systems, datasets, and evaluation metrics. It is easy to discover the advantages and disadvantages of a specific ERD system and its components based on EUEF. We perform a comparison of several popular and publicly available ERD systems by using EUEF, and draw some interesting conclusions after a detailed analysis.

摘要：Puccinia striiformis f. sp. tritici （Pst） is the obligate biotrophic fungus responsible for stripe rust wheat. In this study, we developed and characterized 20 polymorphic microsatelUte markers from the genomic sequence of an isolate of Chinese Pst race C^32. Polymorphism at each simple sequence repeat （SSR） locus was determined using 32 Pst isolates from 7 countries. The number of alleles varied from 2 to 7 across isolates, and the observed and expected heterozygosities ranged from 0.33 to 0.97 （mean 0.62） and 0.23 to 0.73 （mean 0.51 ）, respectively. As expected the genomic SSR markers were more polymorphic than the expressed sequence tag （EST）-SSR markers developed previously. These markers will be more useful for population genetics and molecular genetics studies in Pst.

摘要：为合理确定机械手稳定夹持时的夹紧力,采用弹性线接触理论计算在工件上施加预紧力后机械手V型体与工件之间的接触压力,并分析手指处于不同工况位置时接触压力的变化,在此基础上计算不同工况位置时指端两V型体的夹紧力。以力螺旋理论为基础,建立手指与工件的接触模型,应用力封闭原理分析稳定夹持时接触压力与工件外力之间的关系,提出手指夹持工件时的稳定性判定方法,并针对实例计算接触力及夹紧力。研究结果表明:该方法可以用于准确计算V型体的夹紧力,并进行力封闭性判别,能够为机械手结构设计及其控制系统设计提供可靠的参数值。

摘要：跟踪伺服系统设计是APT核心技术,决定了通信链路能否建立以及通信系统的性能。针对精跟踪伺服系统设计中光斑抖动时变不确定性和PZT驱动中存在的迟滞、蠕变和位移非线性等不足,采用RBF神经网络自学习方法,控制PZT驱动精瞄偏转镜偏转,最终达到精跟踪伺服系统优化控制。通过16km链路的空间光通信实验表明:抑制到达角起伏后,最大起伏幅度抑制了80%和起伏均方差减少4倍,光纤耦合效率提高了6倍,光功率相对波动幅度明显减小;RBF神经网络控制算法增强了伺服系统鲁棒性,并提高了伺服系统实时性。

摘要：为探索离心压气机多学科设计优化策略,进一步提高优化效率,建立了基于本征正交分解(POD)技术的离心压气机优化系统。首先选择样本数据生成快照矩阵,进行本征正交分解后,提取了占支配性的少数几个基函数,并以POD系数作为新的设计变量,构建了降阶的设计空间,从而大幅度减少了设计变量的个数。然后与离心压气机多学科优化流程相结合,建立了一种高效率的优化策略。为验证系统的可行性,以极大化等熵效率为目标,针对最大转速状态和巡航状态两个计算工况对压气机进行优化。结果表明:该优化策略在有效减少设计变量个数方面具有优势,从而使优化问题能够快速的收敛,优化后两个工况下的设计点等熵效率分别提高了3.5%和4%。

摘要：煤矿工作面液压支架架间漏矸不但影响工作面推进速度,还会对工作面内人员安全及设备使用造成较大威胁。分析了工作面回采过程中液压支架架间漏矸原因,提出从三机配套、支架设计、使用和现场顶板维护三方面进行综合管控,最大程度地减少漏矸。

摘要：Conical picks are important tools for rock mechanical *** cutting force(MCF)of conical pick determines the suitability of the target rock for mechanical *** evaluation of MCF is important for pick design and rock *** study proposed hybrid methods composed of boosting trees and Bayesian optimization(BO)for accurate evaluation of MCF.220 datasets including uniaxial compression strength,tensile strength,tip angle(θ),attack angle,and cutting depth,were *** boosting trees were developed based on the database to predict *** optimized the hyper-parameters of these boosting *** evaluation suggested that the proposed hybrid models outperformed many commonly utilized machine learning *** hybrid model composed of BO and categorical boosting(BO-CatBoost)was the *** outstanding performance was attributed to its advantages in dealing with categorical features(θincluded 6 types of angles and could be considered as categorical features).A graphical user interface was developed to facilitate the application of BO-CatBoost for the estimation of ***,the influences of the input parameters on the model and their relationship with MCF were ***θincreased from 80°to 90°,it had a significant contribution to the increase of MCF.