Named entity recognition in Turkish: A comparative study with detailed error analysis

Named entity recognition aims to detect pre-determined entity types in unstructured text. There is a limited number of studies on this task for low-resource languages such as Turkish. We provide a comprehensive study for Turkish named entity recognition by comparing the performances of existing state-of-the-art models on the datasets with varying domains to understand their generalization capability and further analyze why such models fail or succeed in this task. Our experimental results, supported by statistical tests, show that the highest weighted F1 scores are obtained by Transformer-based language models, varying from 80.8% in tweets to 96.1% in news articles. We find that Transformer-based language models are more robust to entity types with a small sample size and longer named entities compared to traditional models, yet all models have poor performance for longer named entities in social media. Moreover, when we shuffle 80% of words in a sentence to imitate flexible word order in Turkish, we observe more performance deterioration, 12% in well-written texts, compared to 7% in noisy text.     

一种基于单片机的智能电子天平系统

介绍了一种基于80C31处理器的智能电子天平系统的工作原理，包括系统的硬件原理及软件流程框图，并较系统地进行了误差分析。本系统应用了电磁力反馈平衡零位法原理，采用单片微处理器进行实时控制和数据处理，实现了天平的电子化、数字化、智能化。     

PH-spline approximation for Bézier curve and rendering offset

In this paper, a G¹, C¹, C² PH-spline is employed as an approximation for a give Bézier curve within error bound and further renders offset which can be regarded as an approximate offset to the Bézier curve. The errors between PH-spline and the Bézier curve, the offset to PH-spline and the offset to the given Bézier curve are also estimated. A new algorithm for constructing offset to the Bézier curve is proposed. Project supported by the National Natural Foundation of China (No. 60073023) and the National Basic Research Program (973) of China (No. 2002CB312101)     

On constructing symmetrical reversible variable-length codes independent of the Huffman code

Reversible variable length codes (RVLCs) have received much attention due to their excellent error resilient capabilities. In this paper, a novel construction algorithm for symmetrical RVLC is proposed which is independent of the Huffman code. The proposed algorithm's codeword assignment is only based on symbol occurrence probability. It has many advantages over symmetrical construction algorithms available for easy realization and better code performance. In addition, the proposed algorithm simplifies the codeword selection mechanism dramatically.     

RTP-based broadcast streaming of high definition H.264/AVC video: an error robustness evaluation

In this work, we present an evaluation of the performance and error robustness of RTP-based broadcast streaming of high-quality high-definition (HD) H.264/AVC video. Using a fully controlled IP test bed (Hillestad et al., 2005), we broadcast high-definition video over RTP/UDP, and use an IP network emulator to introduce a varying amount of randomly distributed packet loss. A high-performance network interface monitoring card is used to capture the video packets into a trace file. Purpose-built software parses the trace file, analyzes the RTP stream and assembles the correctly received NAL units into an H.264/AVC Annex B byte stream file, which is subsequently decoded by JVT JM 10.1 reference software. The proposed measurement setup is a novel, practical and intuitive approach to perform error resilience testing of real-world H.264/AVC broadcast applications. Through a series of experiments, we evaluate some of the error resilience features of the H.264/AVC standard, and see how they perform at packet loss rates from 0.01 % to 5%. The results confirmed that an appropriate slice partitioning scheme is essential to have a graceful degradation in received quality in the case of packet loss. While flexible macroblock ordering reduces the compression efficiency about 1 dB for our test material, reconstructed video quality is improved for loss rates above 0.25%.     

社区矫正主体建构论略

社区矫正在我国经过试点并进一步得到推广,目前到了应该关注其具体问题的时候。笔者关注杜区矫正主体的建构问题,认为它应包括社区矫正的决定主体和执行主体。就我国现行规定来说,决定主体并不存在问题,关键是执行主体问题。在考察西方国家主体建构情况,并分析我们目前存在的问题后,提出了自己的一点建议。     

高职院校产教结合的误区分析及对策研究

高等职业教育既不同于以学术研究为特色的普通高等教育，又与重在培养学生专业技能的中等职教有本质的区别。高等职教培养大专厦以上文化层次的技术型、操作型、应用型人才的办学宗旨，决定了高职办学必须走校企合作之路，高度重视产教结合工作。研究当前产教结合工作的误区和对策，对于促进高等职教健康、快速、持续发展大有裨益。     

惠斯通电桥的系统误差

本文对惠斯通电桥的系统误差作了分析讨论,在此基础上提出了减少系统误差以提高测量结果准确度的有效方法.     

错误分析与外语教学中的纠错问题

错误分析把语言学习者置于研究中心 ,从学生的错误探讨外语学习者的学习过程和内在学习策略。文章从对比分析和非对比分析两个方面 ,结合教学实践 ,探讨学习者的语言错误 ,并在此基础上思考外语教学中的纠错问题。     

城镇化对居民生活能源消费的影响分析

居民生活能源消费与城镇化进程密切相关,利用1983-2012年数据对二者进行实证分析,发现二者存在长期均衡稳定的关系,同时二者表现为双向格兰杰原因,且城镇化对居民生活能源消费的影响更大。误差修正模型的结果不仅表明城镇化对居民生活能源消费具有影响,也表明了居民生活能源消费同样受其自身的影响。方差分解的结果证实城镇化发展对居民生活能源消费具有长期正向影响的作用,以此提出推进城镇化建设政策建议。