造船企业分层成本计算法简介

本文基于前期对中间产品特点和专业化生产的研究,提出分层成本计算法,并对其定义、特点及成本计算程序进行了详细阐述。

分层组合计算法在高边坡综合治理中的应用实例

结合实例介绍通过地质特征分析来确定岩体结构面的方法,并经过稳定性分析后提出边坡综合治理措施。工程实践表明,这些安全、经济、合理的治理措施对高边坡的病害治理具有积极的意义。

考虑锥向金属流动的大型锥形筒节轧制力计算模型

由于大型锥形筒节存在锥度,考虑金属沿锥向的流动,首先采用微分分层计算法和切块法建立了大型锥形筒节轧制力力学模型;然后基于ABAQUS有限元软件,建立了大型锥形筒节轧制过程仿真模型。模型计算结果和有限元仿真结果表明:力学模型计算轧制力与有限元计算总轧制力的相对误差在20%以内。对比分析了力学模型和有限元模拟计算单位轧制力的分布。通过分析芯辊和外辊的转速比,得出了所建力学模型的稳定轧制的适用范围。

高层建筑结构温度效应的简化计算

寒冷地区高层建筑结构温度效应是一个十分重要的问题,计算复杂、工作量大。本文提出的分层计算法、方法简单直观,适用于初步设计。

生物遗传概率计算中的一题多解

例：下图为某遗传病的系谱图。正常色觉（B）对色盲（b）为显性，为伴性遗传；正常肤色（A）对白色（a）为显性．为常染色体遗传。请识图回答：

一种新的大气折光改正模式

在参考现有的几种大气折光改正模型的基础上 ,从大气边界层的结构及状态入手 ,结合我国测绘生产部门的现实情况 ,提出一种适用面广、实用性强的大气折光改正模式——近似分层计算法。

潮南大溪地灾因素的岩土力学分析

运用土力学的分层总和法推算含软土的地基总的沉降量,以总的沉降量作为主要参数,分析潮南大溪河流域的地面沉降机理,用边坡土的土力学内摩擦角、粘聚力、容重、支挡结构面摩擦角及摩擦系数推算边坡防护工程的抗滑和抗倾覆性能参数,推定边坡坍塌、滑坡的可能性,以阐明预测评估边坡稳定性的方法,其中包括路堤边坡的坍塌滑坡评估,路堤边坡的稳定性分析,从而,提出路堤边坡坍塌滑坡治理可行方案。

A new decision tree learning algorithm

In order to improve the generalization ability of binary decision trees, a new learning algorithm, the MMDT algorithm, is presented. Based on statistical learning theory the generalization performance of binary decision trees is analyzed, and the assessment rule is proposed. Under the direction of the assessment rule, the MMDT algorithm is implemented. The algorithm maps training examples from an original space to a high dimension feature space, and constructs a decision tree in it. In the feature space, a new decision node splitting criterion, the max-min rule, is used, and the margin of each decision node is maximized using a support vector machine, to improve the generalization performance. Experimental results show that the new learning algorithm is much superior to others such as C4. 5 and OCI.

An Ant Colony Algorithm Based on Cross-Layer Design for Routing and Wavelength Assignment in Optical Satellite Networks

This paper introduces an ant colony routing and wavelength assignment algorithm based on cross-layer design(CL-ACRWA),which can overcome the adverse effects of Doppler wavelength shift on data transmission in optical satellite networks. Firstly, a cross-layer optimization model is built, which considers the Doppler wavelength shift, the transmission delay as well as wavelength-continuity constraint. Then an ant colony algorithm is utilized to solve the cross-layer optimization model, resulting in finding an optimal light path satisfying the above constraints for every connection request. The performance of CL-ACRWA is measured by the communication success probability, the convergence property and the transmission delay. Simulation results show that CL-ACRWA performs well in communication success probability and has good global search ability as well as fast convergence speed. Meanwhile, the transmission delay can meet the basic requirement of real-time transmission of business.

Electron bandstructure of kaolinite and its mechanism of flotation using dodecylamine as collector

The bulk electronic structure of kaolinite (001) plane was studied with quantum mechanical calculations. The CASTEP parameterization of ultrasoft pseudopotentials without core corrections was used to optimize the structure of kaolinite bulk and slab models. The results show that Fermi energy of kaolinite (001) plane is 3.05 eV, and the band gap is 4.52 eV. The partial density of states (PDOS) of kaolinite (001) plane indicates that Al-O and Si-O bonds on the mineral surface are highly polar. The oxygen atoms of hydroxyl groups in surface layer are capable of forming hydrogen bond with the head group of cationic collectors. The properties of dodecylamine (DDA) cation were also calculated by density function theory (DFT) method at B3LYP/6-31G (d) level for illuminating the flotation processes of kaolinite. Besides the electrostatic attraction, the mechanism between kaolinite and DDA is found to be hydrogen bonds under acidic condition.

Analyzing Motion Patterns in Crowded Scenes via Automatic Tracklets Clustering

Crowded scene analysis is currently a hot and challenging topic in computer vision field. The ability to analyze motion patterns from videos is a difficult, but critical part of this problem. In this paper, we propose a novel approach for the analysis of motion patterns by clustering the tracklets using an unsupervised hierarchical clustering algorithm, where the similarity between tracklets is measured by the Longest Common Subsequences. The tracklets are obtained by tracking dense points under three effective rules, therefore enabling it to capture the motion patterns in crowded scenes. The analysis of motion patterns is implemented in a completely unsupervised way, and the tracklets are clustered automatically through hierarchical clustering algorithm based on a graphic model. To validate the performance of our approach, we conducted experimental evaluations on two datasets. The results reveal the precise distributions of motion patterns in current crowded videos and demonstrate the effectiveness of our approach.

An Overview of the Analytic Hierarchy Process （AHP） and Its Applications to Determine Benchmarking Criteria in Industrial Companies

This paper determines benchmarking criteria from the actors＇ point of view, who are involved in benchmarking processes within four Libyan industrial companies （LICs）. It also describes an application of the analytic hierarchy process （AHP）, which can help an organization to determine its benchmarking criteria. It presents a structured hierarchy for assessing the key capabilities using the AHP. The hierarchy is illustrated using the four main criteria that manufacturing companies will consider when carrying out benchmarking. AHP and benchmarking techniques make the implementation and analysis studies more effective, easy, and applicable to companies. Further, AHP is used to calculate the relative weights of criteria, sub-criteria, and specific sub-criteria, to prioritize them, and finally to select the important benchmarking criteria within each of the four companies investigated. The overall findings suggest that quality control is the most important criterion considered to be benchmarked in companies Q and R. Meanwhile, cost control is considered as the most important criterion to be benchmarked in companies S and T1.

Optimum mining method selection using fuzzy analytical hierarchy process–Qapiliq salt mine,Iran

Mining method selection is the first and the most critical problem in mine design and depends on some parameters such as geotechnical and geological features and economic and geographic factors. In this paper, the factors affecting mining method selection are determined. These factors include shape, thick- ness, depth, slope, RMR and RSS of the orebody, RMR and RSS of the hanging wall and footwall. Then, the priorities of these factors are calculated. In order to calculate the priorities of factors and select the best mining method for Qapiliq salt mine, Iran, based on these priorities, fuzzy analytical hierarchy process （AHP） technique is used. For this purpose, a questionnaire was prepared and was given to the associated experts. Finally, after a comparison carried out based on the effective factors, between the four mining methods including area mining, room and pillar, cut and fill and stope and pillar methods, the stope and nillar mining method was selected as the most suitable method to this mine.

Dynamic routing and wavelength assignment algorithm of optical satellite networks based on cross-layer design

In order to overcome the adverse effects of Doppler wavelength shift on data transmission in the optical satellite networks,a dynamic routing and wavelength assignment algorithm based on crosslayer design( CL-DRWA) is introduced which can improve robustness of the network. Above all,a cross-layer optimization model is designed,which considers transmission delay and wavelength-continuity constraint,as well as Doppler wavelength shift. Then CL-DRWA is applied to solve this model,resulting in finding an optimal light path satisfying the above constraints for every connection request. In CL-DRWA,Bellman-Ford method is used to find an optimal route and a distributed relative capacity loss method is implemented to get an optimal wavelength assignment result on the optimal route. Moreover,compared with the dynamic routing and wavelength assignment algorithm based on minimum delay strategy( MD-DRWA),CL-DRWA can make an improvement of 5. 3% on the communication success probability. Meanwhile,CL-DRWA can meet the requirement of transmission delay for real-time services.

中美欧标准桩基础的设计与研究

基础工程是每个项目建设的重要里程碑,是土建工程的先锋,也是后续工作能否顺利开展的关键性环节;在海外项目中,其更重要的作用是与业主工程师的"初次交锋",为后面的顺利磨合赢得先机,避免让批图过程陷入"持久战"。对标初期,由于误认为欧洲标准的岩土工程部分"内容空泛",于是着力研究如何引入其他标准来填补此空缺。也正是在这样的研究背景下,发现了中美欧标准的共同特点在于理论与可靠度设计原则。因此,与以往中外对标研究方法有所不同,本文以项目在桩基设计方面的需求为主线,以中欧对标以及提取中美欧标准共性为目的,逐步展开讨论,研究内容包括:桩竖向(极限)承载力计算;桩在水平荷载作用下的设计方法研究;桩身承载力及屈曲;桩基础沉降计算。在研究过程中,获得了许多有益的结论,并在此基础上提出了自己的方法及见解,供同行参考。