特征曲线

The research is about the reuse of urban sewage for virescence irrigation, and the influence of sewage irrigation on eco-environment such as soil, plant, etc. is studied. Under the condition of field sewage irrigation, the transport and transformation and accumulation mechanism of heavy metals, nutrients and organic pollutants as vaporizable hydroxybenzene etc. in the soil-plant system are analyzed. The heavy metal pollution is evaluated by the comprehensive pollution index. The spatial variability of heavy metals in sewage irrigation area is further understood. The spatial variability of heavy metals and physical and chemical properties of soil are reflected in a more straight way by the theory model of variance function curve based on the geographical information system.

在城市污水回用于绿化灌溉对土壤、植物等生态环境的影响研究中分析了大田条件下污灌对土壤-植物体系中重金属、养分及挥发酚等有机污染物迁移转化及富集机理，对重金属污染进行了综合污染指数评价，进一步了解了污灌区重金属分布的空间异质性，基于地理信息系统提出了变异函数曲线的理论模型，更直观地反映出了重金属元素与土壤理化参数的空间变异特征。

The results show that electromagnetic vibration of hydropower generator rotors exhibits nonlinear characteristics, including the jumping phenomenon of amplitude-frequency curve and the obvious soft characteristics.

结果表明，动态偏心条件下水轮发电机转子的电磁振动呈现非线性特征，幅频曲线在一定条件下将出现跳跃现象，系统呈现明显的软特性。

The frequency character of tropical cyclone landing Viet Nam, and its relation to rainfall in Vietnam.

从其9一年平滑曲线来看夏季登陆越南的热带气旋频数具有明显的年代际变化特征。

Results showed that the Chinese white poplar had typical properties of all cellular solids.

结合杨木的准静态实验结果发现，其应力－应变曲线具有多孔材料的典型特征。

TEM method used to search water bursting drift of coal mine,the shape of curve showing single peak abnormalism of high electric potential,thereby make accuracy of search much higher and there are clear effect.

TEM法在煤矿突水巷道勘探中，曲线形态为高电位单峰异常，这个特征用于煤矿充水巷道探测准确度高，效果明显。

Furthermore, the factors affecting cutting qualities and efficiency and The research result included: firstly, matching of the tractor"s moving velocity and the cutting velocity, the degree of tightness of the cutter chain, the height of stubble, the opening of the cutting protector and the interval between two adjoining blades, the matching of configuration parameters of blades are the main factors affecting the cutting quality and efficiency; secondly, the cutter"s dynamically cutting of the arundo donaxl includes three stages: touching, cutting-in and cutting-off; thirdly, the movement tracks of stalks of Arundo Donaxl, which are cutted off has been acquired.

试验研究得到以下结论：(1)机组前进速度与切割速度的匹配、链条的张紧度、割茬的高低、护刃器的开合度及相邻动切割刀片的间距以及刀片结构参数的匹配是影响芦竹切割质量和切割效率的主要因素；(2)切割器对芦竹的动态切割过程包括接触、切入和切断三个显著不同的阶段，各阶段存在不同的切割特征；(3)得出了切割过程中被切断作物茎秆的运动轨迹曲线。

The current time curve of the autocatalytic electrode processes under constant potential on planar electrode is studied.

讨论了在恒定电位电解下自催化的电极过程的情况，其特征是电流对时间的曲线上出现极小点。

Ecological environment factors affecting its growth and development and the spatial distribution characteristics of plant autoeciousness of Hemiberlesia pitysophila were comprehensively analyzed by combining Maxent ecological niche models with geographical information system technique in this paper.The relatively exactly potential distribution region of Hemiberlesia pitysophila in whole Chi...

本文选用Maxent生态位模型与地理信息系统相结合，综合分析影响松突圆蚧生长发育的环境因素，结合寄主分布特征，非常直观定量地获得了松突圆蚧在我国的潜在发生区，计算结果经ROC曲线分析法验证，Maxent生态位模型的AUC值为0.991(非常接近于1)，表明预测获得了较好的效果，研究可为松突圆蚧的检疫及防治决策的制定提供科学依据。

ABSTRACT摘要: The present paper is mainly introduced GPS the basic principle, the system composition, the technical characteristic, the error source and the application method and the sequence of operation, and carry on a lofting, the curve lofting as well as using GPS in the project survey carry on the boundary point survey in the cadastration, carries on the precision analysis to the measurement result.

论文摘要摘要：本论文主要介绍GPS的基本原理、系统组成、技术特征、误差来源和使用方法及操作步骤，并利用GPS在工程测量中进行点放样、曲线放样以及在地籍测量中进行界址点测量，对测量结果进行精度分析。

Experimental study is practiced to examine AWJ cutting quality.By changing waterjet pressure and cutting speed,cutting kerf surface quality is studied.By the analysis of AWJ cutting mechanism and cutting process,the thesis explores the specific shape of the cutting section and its mechanism,and believes that the asymmetric distribution of abrasive jet's kinetic energy and jet's deflexion causing the formation of striations,waviness and cuspidate end.However,high-efficient cutting of AWJ could be achieved by...

对磨料水射流的切割质量进行了试验研究，通过改变水射流压力、切割进给速度来研究切割断面质量，对AWJ切割机理和切割过程进行了分析，探讨了AWJ切割断面的形貌特征及其形成机理，认为是射流断面磨料动能的分布不均和射流的偏转滞后造成了AWJ切割断面斜条纹和曲线及尖角处的尖端，提出了两种提高磨料水射流切割质量的方法。

And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时，论述了一体化管理体系构建中的几个主要问题，包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。