Worst泪道探针联合改良泪道穿线插管法在复杂性泪小管断裂吻合术中的应用

目的:探讨Worst泪道探针联合改良泪道穿线插管法在复杂性泪小管断裂吻合术中的应用价值。方法:回顾性研究。选取2019-03-01/2021-03-31遵义医科大学第二附属医院眼科收治的复杂性外伤性泪小管断裂患者68例68眼。根据手术方式分为两组,A组患者36例36眼采用Worst泪道探针寻找泪小管断端并联合改良泪道穿线插管法治疗,B组患者32例32眼采用显微镜下寻找泪小管断端,双路插管法吻合泪小管术治疗。比较两组患者临床疗效、术中寻找泪小管断端成功率、寻找泪小管断端时间、手术时间、疼痛程度、术后眼部异物感及并发症情况。结果:A组患者临床疗效总有效率高于B组(94%vs 38%),术中寻找泪小管断端成功率高于B组(100%vs 47%),寻找泪小管断端时间、手术时间均短于B组,疼痛程度评分低于B组(均P<0.05)。术后随访6mo~1a,A组患者术后眼部异物感评分、泪小点撕裂及形态变化发生率、溢泪程度均低于B组(均P<0.05)。结论:Worst泪道探针联合改良泪道穿线插管法治疗复杂性外伤性泪小管断裂能更精确找到泪小管断端,缩短手术时间,减轻患者疼痛及术后眼部异物感,提高临床疗效,降低并发症发生率。

l_1系统辨识中的代数算法及其Worst－case误差

讨论单输入单输出、离散时不变因果系统的ｌ１系统辨识问题。首先提出基于代数方法的代数算法，并分析了该算法的特点；然后估计其Ｗｏｒｓｔ－ｃａｓｅ误差，并证明了该算法的收敛性；最后讨论了在某些特殊情况下该算法的相应形式。所给结果是面向鲁棒控制的。

Worst泪道探针加硅胶管环管支撑泪小管断裂吻合术的临床观察

目的:探讨外伤性泪小管断裂吻合的有效方法。方法:32例外伤引起下泪小管断裂患者,利用Worst泪道探针加硅胶管环管支撑治疗,手术1次吻合成功。随访0.5～1a。结果:31例治愈,术后随访泪道通畅,无流泪。因睑外翻不成功1例。结论:采用Worst泪道探针加硅胶管环管支撑泪小管断裂吻合术治疗泪小管断裂方法简便效果好。

Full ranking procedure based on best and worst frontiers

In the traditional data envelopment analysis （DEA） structure, the efficiency score for one decision making unit （DMU） is calculated by measuring the distance of the evaluated DMU to the best practice frontier. Recent researches have provided the reasonability of considering the worst practice frontier as a supple- ment to the traditional DEA techniques. The existing researches take only one type of frontier into account, and they cannot com- pare the evaluated DMU with both the best and the worst perform- ing DMUs. A DEA-based procedure is developed to consider the best and the worst frontiers in the same scenario where the ratio of two distances （RDS） measure is proposed. The principal appli- cation of this approach is for ranking, and, as a complement tool, for performance evaluation. The proposed approach can be used in a wide range of applications such as the performance evaluation of employees and others. Finally, a bookstore data set is used to illustrate the proposed approach.

COMPUTATIONAL COMPLEXITY IN WORST, STOCHASTIC AND AVERAGE CASE SETTING ON FUNCTIONAL APPROXIMATION PROBLEM OF MULTIVARIATE

The order of computational complexity of all bounded linear functional ap proximation problem is determined for the generalized Sobolev class Wp?（Id）, Nikolskii class H|∞k（Id） in the worst （deterministic）, stochastic and average case setting, from which it is concluded that the bounded linear functional approximation problem for the classes Wp?（Id） and H∞k（Id） is intractable in worst case setting, but is tractable with respect to stochastic and average case setting.

离散非线性系统Worst-Case辨识——小波逼近法

利用小波逼近的软阈（Ｓｏｆｔ－Ｔｈｒｅｓｈｏｌｄｉｎｇ）方法，研究了离散非线性系统的Ｗｏｒｓｔ－Ｃａｓｅ辨识问题．证明了该算法在Ｗｏｒｓｔ－Ｃａｓｅ误差下的拟最优性和光滑性；估计了该算法的Ｗｏｒｓｔ－Ｃａｓｅ误差：给出了存在鲁棒收敛的辨识算法的充要条件；最后，证明了小波网逼近算法是鲁棒收敛的．

WORST SUBCARRIER AVOIDING WATER-FILLING SUBCARRIER ALLOCATION SCHEME FOR OFDM-BASED CRN

Efficient and reliable subcarrier power joint allocation is served as a promising problem in cognitive OFDM-based Cognitive Radio Networks (CRN). This paper focuses on optimal subcarrier allocation for OFDM-based CRN. We mainly propose subcarrier allocation scheme denoted as Worst Subcarrier Avoiding Water-filling (WSAW), which is based on Rate Adaptive (RA) criterion and three constraints are considered in CRN. The algorithm divides the assignment procedure into two phases. The first phase is an initial subcarrier allocation based on the idea of avoiding selecting the worst subcarrier in order to maximize the transmission rate; while the second phase is an iterative adjustment process which is realized by swapping pairs of subcarriers between arbitrary users. The proposed scheme could assign subcarriers in accordance with channel coherence time. Hence, real time subcarrier allocation could be implemented. Simulation results show that, comparing with the similar existing algorithms, the proposed scheme could achieve larger capacity and a near-optimal BER performance.

A Genetic Approach to Analyze Algorithm Performance Based on the Worst-Case Instances

Search-based software engineering has mainly dealt with automated test data generation by metaheuristic search techniques. Similarly, we try to generate the test data (i.e., problem instances) which show the worst case of algorithms by such a technique. In this paper, in terms of non-functional testing, we re-define the worst case of some algorithms, respectively. By using genetic algorithms (GAs), we illustrate the strategies corresponding to each type of instances. We here adopt three problems for examples;the sorting problem, the 0/1 knapsack problem (0/1KP), and the travelling salesperson problem (TSP). In some algorithms solving these problems, we could find the worst-case instances successfully;the successfulness of the result is based on a statistical approach and comparison to the results by using the random testing. Our tried examples introduce informative guidelines to the use of genetic algorithms in generating the worst-case instance, which is defined in the aspect of algorithm performance.

Best—Worst Scaling方法综述

关于测量市场和消费者行为的方法,现有的研究大都是用李克特量表直接测量,然而这种方法有很多弊端,据此得到的调查数据质量并不高。基于此,有学者发明了一种更加准确的方法——Best—Worst Scaling。文章主要介绍了Best—Worst Scaling方法的背景与内涵、该方法的具体操作步骤、后期数据分析的方法以及该方法在各个领域的具体运用。

H∞辨识的多项式插值算法及Worst－Case误差

就单输入、单输出、离散、时不变因果系统讨论了面向鲁棒控制的Ｈ∞系统辨识问题．首先提出了用线性规划检验先验假设和后验数据是否相容的判据，然后给出了基于线性规划的多项式插值算法，该算法计算量少、所得模型简单，最后估计了该算法的Ｗｏｒｓｔ－Ｃａｓｅ误差。

THE WORST CASE COMPLEXITY OF THE FREDHOLM EQUATION OF THE SECOND KIND WITH FREE TERM IN H'(Г)

This paper deals with the approximate solution of the Fredholm equation Lu= f of the second kind with f ∈H’(Γ). First, we give the order of the n-the optimal radius in the worst case setting. Then, we show that the Galerkin method using 2n+1 inner products of f has minimal error. Finally, we give the estimate of the ε-complexity of the Fredholm problem of the second kind and Galerkin method in the worst case setting.

Study on Performance and Processability of Sirofil Lightweight Worsted Fabric

The lightweight worsted fabric made of Sirofil yarn was developed and its textile performance was studied. By means of conventional testing, KES and FAST, it is concluded that with the coordination of proper fabric design and processing technique, the performance of this innovative fabric is superior to that of the conventional lightweight fabric Furthermore, it is predicted from the relevant parameters that its processability in the following suit manufacture is very desirable.

Principles and Chief Technologies in Developing Light-weighted Worsted Fabrics

More and more light-weighted fabrics are being required by the market, especially for the worsted manufacture.In the past, such fabrics are produced mainly through changing the structure of woven goods or by using finer yarns. But these possibilities are very limited. In this paper, new devices are discussed: (1) on the yarn level- to use single yarns instead of conventional doubled ones, to decrease number of fibers in yarn cross sections beth during spinning and after finishing; (2) on the fiber level - to use finer fibers in blends with wool and modification of the wool fibers; (3) on the macromolecule level - to stretch the macromolecules in alpha keratin, to get super fine wool fibers.

Analysis of the Meteorological Factors of the Worst Drought Causes in Liupanshui and Its Influence

[Objective] The paper aimed to analyze the meteorological factors of the worst drought in 2010 in Liupanshui City and its impact on the agriculture.[Method] To make research analyses based on the real-time meteorological data and the characters of this drought disaster.[Result]Due to the influence of abnormal atmospheric circulation and El Nio events,the convergence of warm and cold air in the arid are inadequate,so the rainfall reduced seriously,shortage of water resources,and successive drought disasters were intensified by hot and dry weather,moreover,special geographical environment(Karst,desertification,etc.)increased the danger of drought.[Conclusion] Local people faced the test of the severest drought in a century which had great impact on drinking water,agriculture,forestry,hydropower production,residents living and so on.Taking advantage of favorable meteorological conditions for artificial rainfall,and combined with scientific drought-relief measures could help to east the drought in advance and reduce the losses.

Prediction of the Shearing Property of Worsted Fabrics Using BP Neural Network

In this paper, three layers of BP neural network were used to model the shearing properties of worsted fabrics. We train the neural network models with 27 kinds of fabrics, and then use 6 kinds of fabrics to validate the accuracy of the model. The result shows that the predicted accuracy of the models is about 85%.

Analysis of the Appearance Diameter of Yarns in Worsted Fabrics

Three-dimensional Rotational Microscopy was used to take the photos of the fabrics. Three categories of yarn appearance diameters in the worsted fabrics were discussed. The fabrics were grouped into two to explore the relationships between yam appearance diameters at the interlacing points, opening points, and the calculated yam diameters. The correlations between the appearance diameters and fabric parameters were given, and the results showed that the calculated yam diameter and warp cover factor had a very big influence on yam appearance diameter. The equations expressing the relationship between yam appearance diameters and fabric parameters are established using step-regression method. The validation of the equations for one type of fabrics shows a good accuracy with the average error below 9% except the weft fdaments exceeding 22%.

LANZHOU NO.3 WORSTED CO. LTD

The Lanzhou No.3 Worsted Co. Ltd.is one of the backbone enterprises inChina’s textiles industry. In recentyears, proceeding from the enterprise’ssituation, the Company has comprehensivelyconducted the economic operation of asimulated market, shifted its operationalideology, and development pattern by takingscience and technology as the mainstay,

Production of Silk & Wool Blended Worsted Cloth

Wool & silk blended fancy suiting is desinged. Through trial-production with silk sliver and Australian wool top, the spinning technology is investigated, and the relationship of spinning technology, blending ratio and yarn construction is discussed.