两类函数方程确定的微分方程

利用导数定义及二元函数的拉格朗日中值定理,解出了两类函数方程确定的微分方程,并由所得到的微分方程加入适当的条件后还可以转化为常见的微分方程.     

《史记》“动＋之＋名”结构分析

“动＋之＋名”结构一直以来都是一个颇具争议性的结构。文章以《史记》中出现的“夺＋之＋名”和“为＋之＋名”结构为例,以充分的理由证明前人研究中通过变换分析和古人的注释来证明“之”=“其”的观点是不成立的,从而证明整个结构是双宾语结构。     

An efficient page ranking approach based on vector norms using sNorm(p) algorithm

In the whole world, the internet is exercised by millions of people every day for information retrieval. Even for a small to smaller task like fixing a fan, to cook food or even to iron clothes persons opt to search the web. To fulfill the information needs of people, there are billions of web pages, each having a different degree of relevance to the topic of interest (TOI), scattered throughout the web but this huge size makes manual information retrieval impossible. The page ranking algorithm is an integral part of search engines as it arranges web pages associated with a queried TOI in order of their relevance level. It, therefore, plays an important role in regulating the search quality and user experience for information retrieval. PageRank, HITS, and SALSA are well-known page ranking algorithm based on link structure analysis of a seed set, but ranking given by them has not yet been efficient. In this paper, we propose a variant of SALSA to give sNorm(p) for the efficient ranking of web pages. Our approach relies on a p-Norm from Vector Norm family in a novel way for the ranking of web pages as Vector Norms can reduce the impact of low authority weight in hub weight calculation in an efficient way. Our study, then compares the rankings given by PageRank, HITS, SALSA, and sNorm(p) to the same pages in the same query. The effectiveness of the proposed approach over state of the art methods has been shown using performance measurement technique, Mean Reciprocal Rank (MRR), Precision, Mean Average Precision (MAP), Discounted Cumulative Gain (DCG) and Normalized DCG (NDCG). The experimentation is performed on a dataset acquired after pre-processing of the results collected from initial few pages retrieved for a query by the Google search engine. Based on the type and amount of in-hand domain expertise 30 queries are designed. The extensive evaluation and result analysis are performed using MRR, [email protected], MAP, DCG, and NDCG as the performance measuring statistical metrics. Furthermore, results are statistically verified using a significance test. Findings show that our approach outperforms state of the art methods by attaining 0.8666 as MRR value, 0.7957 as MAP value. Thus contributing to the improvement in the ranking of web pages more efficiently as compared to its counterparts.     

变频调速技术在袜机上的应用

本文主要介绍了变频器在袜机应用中系统的构成、控制要点和重要性。     

商机无处不在

How many times have you heard a friend or colleague talk about the introduction of some new technology or a new piece of equipment which is going to revolutionise their workplace?     

从“重点学科”到“一流学科”:政策学习视角

从政策学习主体开放度与政策学习意愿两个维度,将政策学习分为封闭型、抵抗型、争议型和开放型四种类型。贯穿我国高校学科建设政策发展历程的学习主要为封闭型学习,表现为政策学习主体为政府部门主导的小范围的政策网络,政策学习的动因重在经验汲取和问题解决,政策学习的目标为基于满意原则的渐进变迁与局部调整。封闭型政策学习使得学科建设政策无法容纳新因素成长和制度创新的内部机制,无法实现政策的"范式转变",不能满足"一流学科"建设的需要。治理视域下"一流学科"建设应以开放型政策学习推动政策创新和政策范式的转换。     

关于积分中值的讨论

研究了积分中值定理及推广的积分中值定理中的中值ξ的渐近性,得到了几个较为统一的结论.     

巧用均值定理解题

均值定理在证明不等式、求最值及解决实际问题等方面具有广泛的应用,且证(解)法简单。     

Mean shift texture surface detection based on WT and COM feature image selection

INTRODUCTION Visual inspection plays a vital role in assuring the quality of industrial products. Texture surface detection aims at detecting defects such as cracks, stains, broken points, etc. on texture surfaces. Due to the repetitive changes of texture gray values and structures, traditional detection methods based on intensity or edge detection are invalid, which makes texture surface detection one of the most intriguing problems during the past decades. Generally, most of previous a…     

局部对称空间中具有平行平均曲率向量的子流行

设Nn p为n p维局部对称的完备流行,Mn为Nn p中具有平行平均曲率向量的紧致子流行。本文作者给出此类子流行的两个拼挤定理。