A Study on Strategy and Method of Acquisition of the Second Foreign Language

With the successful hosting of the Beijing Olympic Games in 2008 and the World Exposition Shanghai China 2010,English,next to our mother tongue,has become the most important language in China.Therefore,learning English well is very important for most Chinese people.However,learning a foreign language well is not easy.We have to master several learning strategies and methods to learn it successfully.This paper will help all the foreign language learners to find the effective way in learning the second foreign languge.The paper mainly talks about two aspects:improving the abilities in listening,speaking and reading in order to communicate well;developing the ability of writing in English and perfecting the function of social communication.It gives out the concrete methods in listening,speaking,reading,writing,and translating.The authors hope that the paper would be helpful in assisting the foreign language learners to learn and master the second foreign language.

基于WEKA数据挖掘平台的医学数据分类及肾病早期预测

目的:随着医院信息化建设的发展,如何从海量医院临床信息挖掘出隐藏的关联数据,为患者提供早期辅助诊断,是目前智能医疗诊断领域热门的研究方向。方法:在WEKA数据挖掘平台的基础上,对慢性肾脏疾病数据进行挖掘分析,并比较不同挖掘算法的分类准确性。结果:对比实验结果表明,较于其他分类器,Random Forest分类器对慢性肾脏疾病数据集具有较好的分类准确性。结论:基于WEKA数据挖掘平台的医学数据最适合肾脏疾病诊断和预测的算法,为后期医疗行业的大数据分析及挖掘提供新思路。

Evaluation of the Land Production Potential in the Context of Returning Farmland to Forest in Karst Region:A Case Study of Guizhou Province

In this paper, we take Guizhou Province (the heart of southwestern Karst region in China) as the research object. By establishing gray forecasting model and time series forecasting model, we conduct the accuracy test on the actual production capacity of land and the forecasted production capacity of land in 2007 and 2008, and then conduct comprehensive forecast of the land production potential in Guizhou Province in 2020. On this basis, considering the nutritional standards needed by three kinds of life type (dressing warmly and eating one's fill, well-off life, relatively affluent life), we evaluate the land production potential in Guizhou Province under the project of returning farmland to forest. Based on the evaluation results, we put forth the relevant recommendations for achieving sustainable land use in the context of returning farmland to forest in Guizhou Province.

Screening and Identification Differentially Displayed Genes in Fore Stomach Carcinoma of Mice

Objective： To screen and identify key genes differentially displayed in mouse fore stomach carcinoma, in order to elucidate the molecular mechanism underlying carcinogenesis. Methods： The animal models complied with each period of NIH mouse fore stomach carcinoma induced by N-Nitrososarcosineethylester （NSEE） were used in this study. The mice were euthanized on days 14, 28, 56, 77 and 84, respectively, after NSEE-piped treatment, and classified according to their pathologies. The differentially expressed genes were isolated from both normal and morbid tissues by mRNA differential display technique and screened by using Reverse Northern blot. Bioinformatics were employed to analyze the results observed. After identification, ten fragments were cloned and matched with GENEBANK database through homologous analysis. Results： One gene was found identical to splicing factor 3b subunit 1 （Sf3bl）, while seven fragments hold the homology of known cDNA clones. In contrast, other two fragments had extremely low identity to any genes registered in GENBANK databases. Conclusion： It is the first time to demonstrate in this study that splicing factor3b, subunitl （Sf3bl） is related to mouse fore stomach carcinoma. Furthermore, ESC-3 and ESC-4 are suggested to contribute to the development of mouse fore stomach carcinoma, thus may be candidates of new targets of oncogenes.

Characteristics Investigation of Single-Sided Ironless PMLSM Based on Halbach Array for Medium-Speed Maglev Train

This paper investigates characteristics of ironless permanent magnet linear synchronous motor(PMLSM)based on Halbach array used for medium-speed(200km/h)maglev train.Long primary ironless coil is laid in the middle of track and the Halbach permanent magnet array is attached to the bottom of each bogie as a source of traction,U-shape electromagnets at the both sides of the train for levitation.Two dimensional analytical model of single-sided ironless PMLSM based on Halbach array is established,using linear overlay method,the no-load air gap magnetic field is calculated firstly,winding current density distribution is obtained for calculating the characteristics of thrust and normal force against power angle,including force characteristics with equal and unequal pole pitch,the influence of steel sleeper,etc.Besides,the mathematical model for this type motor is built by 3D finite element method,the traction characteristics of medium-speed maglev under maximum speed 200km/h are calculated.The characteristics of this type motor are satisfactory owing to there is no detent force in the motor and thrust force reach maximum meanwhile normal force can be eliminated.Calculation method is verified by comparing finite element results,experimental result on a 200kW type motor further validates the accuracy of calculation and some important conclusions are obtained.

Curriculum Discourse and Foreign Language Teachers'Professional Development

The significance and status of the teachers'professional development make the education system and the society pay more and more attentions.The article elaborates the internal contact of curriculum discourse and teachers'professional development from a few respects such as the rationality of curriculum discourse,the long-term nature of the teachers'professional development and many factors affecting the teachers'professional development.The article also analyzes the external and internal factors influencing Tibet foreign language teachers'professional development,and puts forward the corresponding countermeasures in the light of these problems.

Tectono-magmatic evolution of Tethyan oceanic lithosphere in supra subduction zone fore arc regime:Geochemical fingerprints from crust-mantle sections of Naga Hills Ophiolite

The Naga Hills Ophiolite(NHO)belt in the Indo-Myanmar range(IMR)represents a segment of Tethyan oceanic crust and upper mantle that was involved in an eastward convergence and collision of the Indian Plate with the Burmese Plate during the Late Cretaceous-Eocene.Here,we present a detailed petrological and geochemical account for the mantle and crustal sections of NHO,northeastern India to address(i)the mantle processes and tectonic regimes involved in their genesis and(ii)their coherence in terms of the thermo-tectonic evolution of Tethyan oceanic crust and upper mantle.The NHO suite comprises well preserved crustal and mantle sections discretely exposed at Moki,Ziphu,Molen,Washelo and Lacham areas.The ultramafic-mafic lithologies of NHO are mineralogically composed of variable proportions of olivine,orthopyroxene,clinopyroxene and plagioclase.The primary igneous textures for the mantle peridotites have been overprinted by extensive serpentinisation whereas the crustal section rocks reflect crystal cumulation in a magma chamber.Chondrite normalised REE profiles for the cumulate peridotite-olivine gabbro-gabbro assemblage constituting the crustal section of NHO show flat to depleted LREE patterns consistent with their generation from depleted MORB-type precursor melt in an extensional tectonic setting,while the mantle peridotites depict U-shaped REE patterns marked by relative enrichment of LREE and HREE over MREE.These features collectively imply a dual role of depleted MORB-type and enriched arc-type mantle components for their genesis with imprints of melt-rock and fluid-rock interactions.Tectonically,studied lithologies from NHO correspond to a boninitic to slab-proximal Island Arc Tholeiite affinity thereby conforming to an intraoceanic supra subduction zone(SSZ)fore-arc regime coherent with the subduction initiation process.The geochemical attributes for the crustal and mantle sections of NHO as mirrored by Zr/Hf,Zr/Sm,Nb/Ta,Zr/Nb,Nb/U,Ba/Nb,Ba/Th,Ba/La and Nd/Hf ratios propound a two-stage petrogenetic process:(i)a depleted fore arc basalt(FAB)type tholeiitic melt parental to the crustal lithologies was extracted from the upwelling asthenospheric mantle at SSZ fore-arc extensional regime thereby rendering a refractory residual upper mantle;(ii)the crust and upper mantle of the SSZ fore arc were progressively refertilised by boninitic melts generated in response to subduction initiation and slab-dehydration.The vestiges of Tethyan oceanic lithosphere preserved in NHO represent an accreted intra-oceanic fore arc crust and upper mantle section which records a transitional geodynamic evolution in a SSZ regime marked by subduction initiation,fore arc extension and arc-continent accretion.

EXPRESSION OF PCNA,AKP AND ACP DURING DEVELOPMENT OF MOUSE FORE STOMACH CARCINOMA

Objective： To find out the relationship of the expressions of proliferating cell nuclear antigen （proliferating cell nuclear antigen, PCNA）, alkaline phosphotase （alkaline phosphotase, AKP） and acid phosphotase （acid phosphotase, ACP） with the development of mouse fore stomach cancerization. Methods： The animal models, including the various stages during the development of NIH mouse fore stomach carcinoma, were made by N-Nitrososarcosineethylester （N-Nitrososarcosineethylester, NSEE）. The mice were sacrificed on the 14th, 28th, 42nd, 56th, 70th and 84th days respectively after mice were irrigated with NSEE. The fore stomach was taken out and dissected. The methods of histopathology, immunohistochemistry and isoenzyme electrophoresis were adopted to study the dynamic changes of cell shape and expression of PCNA, AKP and ACP. Results： On the 42nd and 56th days after NSEE treatment, the expression of PCNA increased gradually along with the cancerization. Comparing with the control, there were significant differences （P〈0.05）. On the 70th and 84th days, the expression of PCNA increased further （compared with the control P〈0.01）. The activity of AKP increased gradually along with the cancerization. On the 14th, 28th, 42nd and 56th days, there were significant differences （P〈0.05）; on the 70th and 84th days, the activity of AKP increased further （P〈0.01）. The activity of ACP also increased on the 14th, 28th, 42nd and 56th days, and there were significant differences on the 70th days （P〈0.05） and on the 84th days （P〈0.01） compared with the control. Conclusion： During the carcinogenesis of NIH mouse fore stomach, the expressions of PCNA, AKP and ACP increased gradually and were consisted with the changes of cell shapes.

The Analysis of Performance on Spring Supported Thrust Pads Inclusive of One Dimensional Pressure Buildup

In the paper, a solution of one dimensional fore region pressure build up is put forward. The performance of spring supported thrust bearing is carried out with 3 dimensional thermo elasto hydrodynamic (TEHD) lubrication theory inclusive of inlet pressure build up, thermal elastic distortion of pad and thermal effect. The effects of fore region pressure build up and the variation of some operating conditions on the performance of the pad are studied.

FORES系统存在的问题及解决办法

林业部科技情报中心和中国林科院森计中心联合开发的《全国林业中文科技文献检索系统(FORES)》,不失为一个系统功能强、标准化程度高、值得推广的系统。但它同其他任何系统一样,会不可避免地出现一些错误。今就其中存在的一点问题进行剖析,并提出相应的解决办法。1 问题的发现在进行资料输入时。

三款以太网交换机

ES-1000，ES-1200和ES-2000三款产品是FORE系统公司近日推出的一组新的以太网交换机，这组新的交换机将在ATM骨干或以太网骨干的边缘提供强大的功能和高效性能，从而完善了FORE系统公司现存的解决方案。

Age-associated changes in pulmonary function： a comparison of pulmonary function parameters in healthy young adults and the elderly living in Shanghai

Background The respiratory system changes with age and a better understanding of the changes contribute to detect and prevent respiratory dysfunctions in old population. The purpose of this study was to observe age-associated changes of pulmonary function parameters in healthy young adults and the elderly. Methods A cross-sectional study was conducted among 600 male and female subjects aged 19 to 92 years. The subjects were divided into three groups by age： young adult （19-39 years）, middle-aged adult （40-59 years）, and the elderly （〉60 years）. The pulmonary function was measured with routine examination methods and 13 parameters including vital capacity （VC）, residual volume （RV）, functional residual capacity （FRC）, total lung capacity （TLC）, RV/TLC, forced vital capacity （FVC）, forced expiratory volume in one second （FEV1）, FEV1/FVC, peak expiratory flow （PEF）, forced expiratory flow at 25% of FVC exhaled （FEF25）, forced expiratory flow at 50% of FVC exhaled （FEF50）, diffusion capacity of the lung for carbon monoxide （DLCO）, and specific diffusion capacity of CO （KCO） were collected and analyzed. Changes in pulmonary function parameters among the influence on FEVJFVC and RV were studied further. Results Ten pulmonary function parameters including VC, FVC, pre-elderly and elderly subjects, especially the aging FEV1, FEV1/FVC, PEF, FEF25, FEF50, TLC, DLCO and KCO decreased significantly with age in both male and female subjects （P 〈0.01）. RV and RV/TLC were increased with age （P 〈0.01）. FRC remained stable during aging. Except FRC, the linear relationship was significant between age and other pulmonary function parameters. In the pre-elderly and elderly subjects, RV had a non-significantly increasing tendency with age （P 〉0.05）, and FEV1/FVC did not change significantly with age （P 〉0.05）. Conclusion Total pulmonary function was declined tendency of RV and decreasing tendency of FEV1/FVC with advancing age, but FRC was stable, and the increasing obviously slowed down in the pre-elderly and elderly subjects.

FORE模型:乡村小学校本教研的危机与重构

校本教研是一线教师立足于解决工作中的实际问题,改进教育教学行为的重要途径。但在目前的实施中还不尽如人意,存在改进的必要性。通过对校本教研现状危机的调查和分析,提出基于FORE模型的校本教研形式,以教师的问题为指向,以灵活的扁平结构组织实施,激活教师的研修动力,在实践中实现校本教研的真实价值。

Design and Experiments of Biomimetic Stubble Cutter

The fore claws of the nymph of Cryptotympana atrata have excellent ability to cut and dig soil. Inspired by this, we designed a biomimetic stubble cutter to reduce the cutting resistance. Reverse engineering and 3D print technology were applied to design the biomimetic stubble cutter. Two types of biomimetic corn stubble cutters with different tooth heights （5 mm and 2.5 mm） were designed. The cutting ability of biomimetic corn stubble cutters was compared to the conventional design by the quadratic regression orthogonal test. Tooth height, dip angle of cutting edge, and cutting velocity were chosen as orthogonal test factors. The biomimetic stubble cutters show lower cutting resistance than the conventional one. Cutting velocity exerts the least effect on cutting resistance, followed by tooth height and dip angle of cutting edge. Optimal combination with the least cutting resistance is tooth height of 2.5 mm and dip angle of cutting edge of 40° while the cutting resistance does not vary remarkably with cutting velocity. Test results indicate the serrated structure design as a principal factor for cutting resistance reduction. The biomimetic stubble cutter design, inspired by the soil-cutting mechanism of Cryptotympana atrata nymph, remarkably improves the performance of stubble cutter.

Analytical review and study on object detection techniques in the image

Object detection is the most fundamental but challenging issues in the field of computer vision.Object detection identifies the presence of various individual objects in an image.Great success is attained for object detection/recognition problems in the controlled environment,but still,the problem remains unsolved in the uncontrolled places,particularly,when the objects are placed in arbitrary poses in an occluded and cluttered environment.In the last few years,a lots of efforts are made by researchers to resolve this issue,because of its wide range of applications in computer vision tasks,like content-enabled image retrieval,event or activity recognition,scene understanding,and so on.This review provides a detailed survey of 50 research papers presenting the object detection techniques,like machine learning-based techniques,gradient-based techniques,Fast Region-based Convolutional Neural Network(Fast R-CNN)detector,and the foreground-based techniques.Here,the machine learning-based approaches are classified into deep learning-based approaches,random forest,Support Vector Machine(SVM),and so on.Moreover,the challenges faced by the existing techniques are explained in the gaps and issues section.The analysis based on the classification,toolset,datasets utilized,published year,and the performance metrics are discussed.The future dimension of the research is based on the gaps and issues identified from the existing research works.

Love Of Mountains And Waters——An introduction to Zhang Dawei's landscape paintings

People love mountains and waters, taking delight in talking about landscape. Some draw landscape paintings because they like mountains and waters, placing love on forests and springs.However, drawing mountains-and-waters paintings is no easy job, just like climbing mountains, which requires painters to learn from ancient prominent personage and walk a thousand li without any falsity and trickery.

Fore!高尔夫

一南夷市位于国家规划的经济开发区腹心地带,尽管眼下各地都被承接产业转移喧嚣得十分厉害,内地南下东南亚通道上串连起来的都市,抢地开发热潮一浪高过一浪,但这处古代要冲仍然像一个小小的高原岛国,人们自由、平静、恬适地生活着。然而,两天前却一反往日的安宁,似乎这偏安一域也陡然掀起了十二级台风。准确一点说,新任局长的一把火烧开了人们闭锁的心扉,于是人们的灵魂深处再也平静不下来,