基于汉语二字应成词的歧义字段切分方法

文章提出了利用汉语中的二字应成词,计算汉语句内相邻字之间的互信息1及t-信息差这两个统计信息量的新方法,进而应用这两个统计量,解决汉语自动分词中的歧义字段的自动切分问题。实验结果表明,采用该文所述的方法,对歧义字段的切分正确率将达到90%,与其他分词方法相比较,进一步提高了系统的分词精度,尤其与文献1所述方法比较,对于有大量汉语信息的语料,将降低系统的时间复杂度。

拒绝语义公式切分方法刍议

切分项目存在遗漏、重叠以及形式、功能双重切分标准杂糅是现有拒绝语义公式切分方法面临的主要问题。基于语用逻辑理论动态把握拒绝实现过程,区分语义公式的功能对象和功能旨趣,同时依据功能旨趣强度将同一语义公式相关表现形式概括为不同"表现型"可有效克服上述问题。

提高韵律短语正确切分方法的研究

汉语自动词性标注和韵律短语切分都是汉语文语转换（Text-to-Speech）系统的重要组成部分。在用从人工标注的语料库中得到韵律短语切分点的边界模式以及概率信息，对文本中的韵律短语切分点进行自动预测时，语素'g'这种词性就过于模糊，导致韵律短语切分点预测得不合理。该文提出了一种修改词类标注集，去掉语素'g'这种词性的方法。该方法在进行词性标注时，对实语素恰当地标注出在句中的词性，以便提高韵律短语的正确切分。应用此方法对10万词的训练集和5万词的测试集分别进行封闭和开放测试表明，词性标注正确率分别可达96.67%和92.60%。并采用修改过的词类标注集，对1000句的文本进行了韵律短语切分点的预测，召回率在66.21％左右，正确率达到了75.79％。

随机森林算法中数据切分方法研究

应用随机切分方法将模拟数据集切分成互不相交的两部分,然后从这两部分中进行P次抽样得到2P份数据集,最后从2P份数据集中随机选择一份建立随机森林。实验结果表明,经切分处理的随机森林在回归任务中偏差更小,在分类任务中准确率更高。当ntree在100左右时,误差就趋于稳定。以iris数据集为处理对象,对上述方法进行了验证,结果表明,经切分处理的数据集得到的方差更加稳定。

山有木兮 木须有枝——切分分论点方法刍议

论文写作中合理设置分论点至关重要，因此，应当让学生学会在中心论点的制约下设置适当的分论点，从不同的角度、侧面、层次对中心论点进行论证，使议论文“言之有物”“言之有序”“言之有理”。笔者就从分论点切分方法及其细节做一梳理，期对解困议论文写作裨益些许。

A packet loss avoidance handoff scheme

The basic mobile IP protocol is simple but only suitable for wide area and low speed networks. In this paper, we propose a novel micro-mobile IP handoff scheme, that is the packet loss avoidance handoff scheme. By using an additional cache at the base station and distinguishing packets with packet IDs, the proposed scheme minimizes the number of lost packets during handoff. Network architecture and detailed handoff procedures are given. We also analyze the cache size at the base station, the associated network load with the handoff procedure, and the handoff delay. The scheme is investigated by computer simulations. Simulation results show that the proposed scheme is suitable for environments with fast mobility and frequent handoff.

吃的不是蛋糕

话说当年上大学的时候有一次过生日，身在外地的MM给俺订了一个大蛋糕。幸福!激动!happy!当俺看完卡片，屁颠屁颠地把蛋糕拎回寝室时，发现屋里一字排开端坐着若干个猥琐男，全都两眼放光的对着俺淫笑——我看了看手里的蛋糕，顿时内牛满面。

Choice of approach for hepatectomy for hepatocellular carcinoma located in the caudate lobe:Isolated or combined lobectomy?

AIM:To investigate the significance of the surgical approaches in the prognosis of hepatocellular carcinoma(HCC) located in the caudate lobe with a multivariate regression analysis using a Cox proportional hazard model.METHODS:Thirty-six patients with HCC underwent caudate lobectomy at a single tertiary referral center between January 1995 and June 2010.In this series,left-sided,right-sided and bilateral approaches were used.The outcomes of patients who underwent isolated caudate lobectomy or caudate lobectomy combined with an additional partial hepatectomy were compared.The survival curves of the isolated and combined resection groups were generated by the Kaplan-Meier method and compared by a log-rank test.RESULTS:Sixteen(44.4%) of 36 patients underwent isolated total or partial caudate lobectomy whereas 20(55.6%) received a total or partial caudate lobectomy combined with an additional partial hepatectomy.The median diameter of the tumor was 6.7 cm(range,2.1-15.8 cm).Patients who underwent an isolated caudate lobectomy had significantly longer operative time(240 min vs 170 min),longer length of hospital stay(18 d vs 13 d) and more blood loss(780 mL vs 270 mL) than patients who underwent a combined caudate lobectomy(P < 0.05).There were no perioperative deaths in both groups of patients.The complication rate was higher in the patients who underwent an isolated caudate lobectomy than in those who underwent combined caudate lobectomy(31.3% vs 10.0%,P < 0.05).The 1-,3-and 5-year disease-free survival rates for the isolated caudate lobectomy and the combined caudate lobectomy groups were 54.5%,6.5% and 0% and 85.8%,37.6% and 0%,respectively(P < 0.05).The corresponding overall survival rates were 73.8%,18.5% and 0% and 93.1%,43.6% and 6.7%(P < 0.05).CONCLUSION:The caudate lobectomy combined with an additional partial hepatectomy is preferred because this approach is technically less demanding and offers an adequate surgical margin.

A novel two-stage Lagrangian decomposition approach for refinery production scheduling with operational transitions in mode switching

To address large scale industrial processes,a novel Lagrangian scheme is proposed to decompose a refinery scheduling problem with operational transitions in mode switching into a production subproblem and a blending and delivery subproblem.To accelerate the convergence of Lagrange multipliers,some auxiliary constraints are added in the blending and delivery subproblem.A speed-up scheme is presented to increase the efficiency for solving the production subproblem.An initialization scheme of Lagrange multipliers and a heuristic algorithm to find feasible solutions are designed.Computational results on three cases with different lengths of time horizons and different numbers of orders show that the proposed Lagrangian scheme is effective and efficient.

ECT Image Analysis Methods for Shear Zone Measurements during Silo Discharging Process

The paper covers the electrical capacitance tomography(ECT) data analysis on shear zones formed during silo discharging process.This is due to the ECT aptitude for detection of slight changes of material concentration.On the basis of ECT visualisations,wall-adjacent shear zone profiles are analysed for different wall roughness parameters.The analysis on changes of material concentration,based on ECT images,enables the calculation for the characteristic parameters of shear zones-size and material concentration inside the shear zone in a dynamic process of silo discharging.In order to verify the methodology a series of experiments on gravitational flow of bulk solids under various conditions were conducted with different initial granular material packing densities and silo wall roughness.The investigation shows that the increase in container wall roughness is an effective method for reducing the dynamic effects during the material discharging,since these effects are resulted from the resonance between hopper construction and trembling material.Such effects will damage industrial equipment in practical applications and need further investigation.

Elastoplastic model for discontinuous shear deformation of deep rock mass

Deep rock mass possesses some unusual properties due to high earth stress,which further result in new problems that have not been well understood and explained up to date.In order to investigate the deformation mechanism,the complete deformation process of deep rock mass,with a great emphasis on local shear deformation stage,was analyzed in detail.The quasi continuous shear deformation of the deep rock mass is described by a combination of smooth functions:the averaged distribution of the original deformation field,and the local discontinuities along the slip lines.Hence,an elasto-plastic model is established for the shear deformation process,in which the rotational displacement is taken into account as well as the translational component.Numerical analysis method was developed for case study.Deformation process of a tunnel under high earth stress was investigated for verification.

Fertility sparing management of endometrial complex hyperplasia and endometrial carcinoma

The standard treatment of endometrial cancer or atypical hyperplasia is surgical removal of the uterus and ovaries. In early stage disease this has an excellent chance of cure but results in infertility. Although the majority of patients are postmenopausal an increasing number of patients with atypical hyperplasia or endometrial cancer are presenting with a desire to retain their fertile potential. In the last 8 years a number of studies have been published involving 403 patients with endometrial cancer and 151 patients with Atypical hyperplasia treated with high dose progestagens. The response rate is 76.2% and 85.6% respectively with endometrial cancer having a recurrence rate of 40.6%. There is a 26% recurrence rate in atypical hyperplasia. Overall 26.3% of those wishing to conceive had a live baby. Although concerns exist about the risks of medical treatment, those that fail this treatment do not appear to have a significantly poorer prognosis although 20 patients(3.6%) had either ovarian cancer or metastatic disease discovered during treatment or follow up.

Coupled KdV Equations and Their Explicit Solutions Through Two-Dimensional Hamiltonian System with a Quartic Potential

Based on the second integrable ease of known two-dimensional Hamiltonian system with a quartie potentiM, we propose a 4 × 4 matrix speetrM problem and derive a hierarchy of coupled KdV equations and their Hamiltonian structures. It is shown that solutions of the coupled KdV equations in the hierarchy are reduced to solving two compatible systems of ordinary differentiM equations. As an application, quite a few explicit solutions of the coupled KdV equations are obtained via using separability for the second integrable ease of the two-dimensional Hamiltonian system.

Forced Axial and Torsional Vibrations of a Shaft Line Using the Transfer Matrix Method Related to Solution Coefficients

This present paper deals with a mathematical description of linear axial and torsional vibrations. The normal and tangential stress tensor components produced by axial-torsional deformations and vibrations in the propeller and intermediate shafts, under the influence of propeller-induced static and variable hydrodynamic excitations are also studied. The transfer matrix method related to the constant coefficients of differential equation solutions is used. The advantage of the latter as compared with a well-known method of transfer matrix associated with state vector is the possibility of reducing the number of multiplied matrices when adjacent shaft segments have the same material properties and diameters. The results show that there is no risk of buckling and confirm that the strength of the shaft line depends on the value of the static tangential stresses which is the most important component of the stress tensor.

Research on Recognition Method of Handwritten Numerals Segmentation based on B-P Neural Network

We propose a binarization method based pigment in the ZIP code of 24 bmp image simulation and digital identification by CCD sensors, were extracted the grid binary, image of zip code box and message of the two characters binary image： analyze the image processing, which includes code frame edge detection and separation of the image binarization, denoising smoothing, tilt correction, the extraction code number, position, normalization processing, digital image thinning, character recognition feature extraction. Through testing, the recognition rate of this method can be over 90%. The recognition time of characters for character is less than 1.3 second, which means the method is of more effective recognition ability and can better satisfy the real system requirements.

Research on Recognition Method of Handwritten Numerals Segmentation based on B-P Neural Network

We propose a binarization method based pigment in the ZIP code of 24 bmp image simulation and digital identification by CCD sensors, were extracted the grid binary image of zip code box and message of the two characters binary image; analyze the image processing, which includes code frame edge detection and separation of the image binarization, denoising smoothing, tilt correction, the extraction code number, position, normalization processing, digital image thinning, character recognition feature extraction. Through testing, the recognition rate of this method can be over 90%. The recognition time of characters for character is less than 1.3 second, which means the method is of more effective recognition ability and can better satisfy the real system requirements.

Reliability analysis of laminated composite under compression and shear loads

Carrying on a series of compression and shear tests by a large number of specimens, reliabilities of T300/QY8911 laminated composite were studied when dispersibility models were described. The results show that the stress is linearly dependent on the strain and the damage modes of specimens are brittle fracture for both kinds of tests. Dispersibility models of compression and shear strength are expressed as Re-N（415.39, 6 586.36） and Rs-ln（5.071 8, 0.155 3）, respectively. When normal and lognormal distributions were used to describe the dispersibility models of compression and shear strength, and the compression or shear load follows the normal distribution, the almost same failure probability can be obtained from different reliability analysis methods.

基于CNN的空间数据自适应切分算法

针对空间数据划分方法无法自适应选择问题,本文提出了基于CNN的数据自适应划分算法(Adaptive Partition Algorithm for Space Vector Data-Convolutional Neural Networks,SVDAP-CNN)。该算法首先基于应用场景和其他相关资源实现特征描述和表达;其次基于层次聚类设计特征矩阵表达算法,体现特征间的局部相关性以减少方法选择时间和提高选择精度;最后通过CNN模型实现空间数据自适应划分。本文选取南海区域真实数据和模拟数据进行验证,与已有的数据划分方法选择算法进行比较。结果显示:针对真实数据,SVDAP-CNN算法的精度和时间效率分别提高了24.18%和25.67%;针对特征和特征间关系表达欠完备的模拟数据,SVDAP-CNN算法的精度和时间效率分别提高了27.02%和26.80%;针对选择结果易出错的数据切分方法,SVDAP-CNN算法的精度提高了19.92%,证明了该算法有较好的普适性;另外,本文结合南海区的实际应用证明了该算法的应用可行性。SVDAP-CNN算法的提出可为大数据量、多变的自动化空间应用分析提供技术支撑。

巧分巨型月饼

今天,顾老师准备了一个不常见的巨型月饼和同学们一起分享。我们班有41个同学和3个老师,一共44人,需要把这个巨型月饼平均分成44份。大家一时想不出好的切分方法,最后就由顾老师大概地切分后,分给了大家,每小份月饼的大小都不相同。回到家后我一直在思考这个问题:1块巨型月饼可以平均分成44份吗?