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 given 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.     

固支障碍问题非协调有限元逼近误差估计(英文)

本文讨论固支障碍问题所联系的变分不等式非协调有限元逼近,在合理的正则性假设 下对于一类协调板元其中所括Morley元,第一类及第二类Fraeijs ds Veubeke元,Adini元,Zieneiwez元及不完全双二次非协调WS元得到对应有限元离散问题的误差估计为     

万用表电压测量的误差分析

通过对万用表进行电压测量时由万用表内阻引起的误差和由被测量的电压的波形引起的误差进行分析，以减小误差对测量结果的影响。     

高度计姿态角估计算法误差分析

星载雷达高度计依靠对海面回波的跟踪测量卫星到海面的距离,卫星平台的姿态角会显著影响高度计的回波形状,从而带来指向误差。本文推导了利用高度计回波跟踪反演姿态角的两种算法（两点法和线性回归法）,并对它们进行了误差分析。然后通过蒙特卡洛仿真评估了算法的性能,并对理论分析进行了验证。最后,对算法的实现进行了进一步讨论。     

《大宋重修广韵》讹夺举例

<大宋重修广韵>中的两个韵字"獍"、"髫"的讹夺现象尚未引起前修时贤的关注,"猛"为"髓"形夺"β"而误、"鬃"为"彭形似而讹,讹误的原因一是未细考文献,二是不明古音.     

会计估计、会计估计变更的审计

随着一个国家社会生产力的发展,会计在日常经济生活中的作用将日益显著。作为会计知识的一部分,会计估计及会计估计的变更,在整个会计体系中的作用也就越来越重要了。如何正确使用会计估计、会计估计的变更,如何加强会计估计变更的审计便成为会计工作的重中之重。     

外商直接投资对江西经济增长影响的实证分析

本文运用计量经济方法实证分析1984—2010年FDI对江西经济增长所产生的影响。Johansen协整检验结果表明,FDI和江西省经济增长之间存在长期稳定的均衡关系,FDI的流入促进了江西经济增长。由误差修正模型可知,FDI和江西省经济增长之间的关系由短期偏离向长期均衡调整的速度较快。     

一个修正的三阶收敛的牛顿迭代法

给出了牛顿迭代法的一种修正形式,证明了它是三阶收敛的,通过数值算例进行了验证.     

Incorporating rich syntax information in Grammatical Error Correction

Syntax parse trees are a method of representing sentence structure and are often used to provide models with syntax information and enhance downstream task performance. Because grammar and syntax are inherently linked, the incorporation of syntax parse trees in GEC is a natural solution. In this work, we present a method of incorporating syntax parse trees for Grammatical Error Correction (GEC). Building off a strong sequence-to-sequence Transformer baseline, we present a unified parse integration method for GEC that allows for the use of both dependency and constituency parse trees, as well as their combination - a syntactic graph. Specifically, on the sentence encoder, we propose a graph encoder that can encode dependency trees and constituent trees at the same time, yielding two representations for terminal nodes (i.e., the token of the sentence) and non-terminal nodes. We next use two cross-attentions (NT-Cross-Attention and T-Cross-Attention) to aggregate these source syntactic representations to the target side for final corrections prediction. In addition to evaluating our models on the popular CoNLL-2014 Shared Task and JFLEG GEC benchmarks, we affirm the effectiveness of our proposed method by testing both varying levels of parsing quality and exploring the use of both parsing formalisms. With further empirical exploration and analysis to identify the source of improvement, we found that rich syntax information provided clear clues for GEC; a syntactic graph composed of multiple syntactic parse trees can effectively compensate for the limited quality and insufficient error correction capability of a single syntactic parse tree.     

试析“布鲁克斯误差”的误差

探讨5篇对误差进行分析与修正的文章,指出其中的若干误差,以使后续研究者在利用这些文章实现信息计量时能够减小和控制误差。