查询词典 time scale

At the same time, combining with the actual condition of delivery pipeline of our country and some prevalent leak detection and location methods, this paper raised a method, which is based on wavelet analysis and negative- pressure-wave to detect and locate the leakage. Jobs in the paper are as follows:As affected by gas density, pressure, specific heat and pipe material, the velocity of negative-pressure-wave improved depending on the energy conservation. At one time, taking the affection of velocity of gas flow, the location formula was modified in some degree.When locating the leaks with location formula, the iterative approach algorithm was adopted as a new method to increase the location accuracy level of system.Multi-scale decomposition and reconstruction of wavelet transform is utilized to filter the noise of negative-pressure-wave, which was brought by leakage. With the capacity to detect the signal singularity fast and accurately, wavelet transform was used to catch the break point of pressure signal. The work improved the accuracy of At in location formula, accordingly improved the location accuracy.Wavelet is a suitable tool for signal analysis. The distinct character is that the mother-wavelet is of optional. That means choosing different mother-wavelet will get different analysis result. So we studied how to choose mother-wavelet and its scale for signal singularity detection. The method is to choose a wavelet by regularities of the wavelet and the signal.Finally, a plan, which bases on SCADA system for inspection and detection of natural gas leakage, is proposed in the article.

其中，主要进行了以下几方面的工作：针对泄漏产生的负压波在管道中的传播速度受媒介的密度、压力、比热及材质等因素的影响，而非声波在空气中传播的速度，本文利用能量守恒原理，对其进行了修正；考虑到管内气体流速对压力波速的影响，对原始的负压波定位公式进行了一定程度的改进，并在利用定位公式进行泄漏点定位时采用逐步迭代逼近算法，提高了系统的定位精度；利用小波变换的多分辨率分解和重构技术，对采集到的管道发生泄漏时产生的负压波信号进行了降噪处理；并利用小波变换技术对信号奇异点的快速、准确的识别能力，对经上述消噪后的负压波信号进行了奇异点捕捉，精确捕捉的结果提高了定位公式中上下游站点采集到的负压波奇异点的时间差△t的精度，从而进一步提高了定位的精度；考虑到小波变换是一种基波可变的信号分析工具，也就是说，不同的小波基波对信号分析的结果将有很大差别，这势必影响最终的处理结果，因此，我们又对比分析了本课题中小波基及尺度的选择问题，依据规则性系数相似性原理对母小波的选择进行了探索性研究；最后，还提出了基于SCADA的泄漏检测与定位系统的软件开发构想及系统的嵌入方案。

The full stress optimizes the application in connecting a design of greenhouse with; Even the experimental study of the only warm environment of winter of a plastic greenhouse; Intensify the current situations and trends of raising pig"s craft development; The scale beasts and birds cultivate the technical research progress of the environmental project; Effective way utilized in recycle treatment of the beasts and birds offal; The nourishing oral liquid culture current situation of Japan and new technology; Engineering of animal husbandry of our country and industrialized development are 20 years; Technological economic analysis that heat energy retrieves in winter of chicken coop of North China; Connect large-scaly with the design and test of the natural day-lighting of a chicken coop; Even the experiment research of the environment of summer of a chicken coop; The pig house cools the current situation of technological application study in summer; Application and design of the vertical ventilating system of pig house; The evaporation of agricultural building cools the current situation and prospect of technological study and application; Of our country the South open to cool the question summer in chicken coop; Vertical air current organization that ventilated of chicken coop; Innovation and Development of China"s Animal Husbandry project Science and Technology; The pig farm of scale is raised in the shed and raised the clean production technology mode scattered to study; the Project of the cow is raised in the shed in the scattered fence; Give up and raise sheeps new craft mode to visit for the first time in scale; The piglet keeps the case warm one degree of characteristics of playground of body temperature is studied; Structure optimization of the joining type pig house of roof truss of light steel; Lose electrical power such nearly one hundred as the impact on airtight type hot wet environment of pig house ,etc.

满应力优化在连栋温室设计中的应用；连栋塑料温室冬季光温环境的试验研究；集约化养猪工艺发展的现状与趋势；规模化畜禽养殖环境工程技术研究进展；畜禽废弃物的资源化利用的有效途径；日本的营养液栽培现状及其新技术；我国畜牧工程技术与产业化发展20年；华北地区鸡舍冬季热能回收的技术经济分析；大型连栋鸡舍自然采光的设计与测试；连栋鸡舍夏季环境的实验研究；猪舍夏季降温技术应用研究现状；猪舍纵向通风系统的应用与设计；农业建筑蒸发降温技术研究与应用的现状与展望；我国南方开放式鸡舍的夏季降温问题；鸡舍纵向通风的气流组织；中国畜牧工程科学技术的创新与发展；规模化猪场舍饲散养清洁生产工艺模式研究；奶牛舍饲散栏饲养工程工艺研究；规模化舍饲养羊新工艺模式初探；仔猪保温箱体温度场特性研究；拱型轻钢屋架猪舍的结构优化；夏季停电对密闭式猪舍热湿环境的影响等近百篇。专著与教材：《家畜环境与设施》《畜牧工程——科技创新与发展》《可食用观赏植物》《园艺设施学》《林果花菜设施快速栽培技术》《农业生物环境与能源工程》《居室花卉装饰》《现代温室技术》《中国养鸡学》等。

This text is based on the work that analyse the problem having emerged about large-scale economic affordable residential district of city at the moment, in instance of the patterns in Xi'an. Through investigating living circumstances and building present situation, there are lots of requirement for economic affordable housing in Xi'an. As large requirement for premise, the question about choosing location large-scale economic affordable residential district in city is researched. As time as, it should be refer to the problem which were founded in others cities, then summarize a correct choosing location model for the practical situation, it could determent the location of large-scale economic affordable residential district of Xi'an.

本文以分析现阶段城市大型经济适用居住区产生的问题为依据，立足西安地区，通过调查该地区居民的居住现状以及房地产开发状况，指出经济适用住房在西安地区具有广泛的需求市场，在这种巨大需求量存在的前提下，探讨大型经济适用居住区选址问题，结合现有其它城市大型经济适用居住区中发现的问题与不足，提出一套适合实际情况的选址模式，并且根据该模式分析了西安大型经济适用居住区选址的区位。

Based on the laboratory conditions, the application of the static scale experimental study of the sodium scale corruption, discussed the time, temperature, sodium humate concentration, alkalinity and calcium ion concentration on the impact scale.

本文在实验室条件下，应用静态阻垢实验法研究了腐钠阻垢性能，讨论了时间、温度、腐植酸钠浓度、碱度及钙离子浓度等因素对阻垢的影响。

Result It showed that tracking error, reaction time, correct rate, category scale, multistage evaluation scale, multi-dimensional scale, latency of P3, inter beat interval , inter respiration interval and blink rate were significantly different among the various tasks. CS,MES and MDS were more sensitive to the total load; ER ,LAT, IBI and IRI were more sensitive to the load of primary task, while RT and CR to that of additional task and BR to the visual load.

结果 追踪误差、反应时、正确率、类别量表评分、多级估量量表评分、多维量表评分、P3潜伏期、逐次心跳间期、逐次呼吸间期和眨眼率在不同任务之间有显著差异(P＜0.05)，CS、MES和MDS对任务总负荷，ER、LAT、IBI和IRI对主任务负荷，RT和CR对附任务负荷，BR对视觉负荷更敏感。

In Chapter 5, some knowledge about large-scale system and methods for investigating them are introduced, Lyapunov function, differential inequality, Razumikhin theorem, matrix norm and measure methods have been used to discuss the stability of uncertain large-scale system with delays and decay estimates for uncertain time-varying large-scale system with delays, the criteria of stability and decay estimates for uncertain large-scale system with delays are given.

第五章首先介绍了大系统的有关知识以及时滞大系统研究的方法，然后利用Lyapunov函数法、微分不等式法、Razumikhin定理法、矩阵范数与测度法研究了不确定定常时滞大系统的稳定性以及不确定时变时滞大系统的稳定性与系统衰减率的估计问题，得到了系统稳定的判别条件以及系统衰减率的估计。

A technique of massive scale data management and attemperation based on viewpoint. This algorithm effectively changes massive scale terrain into large scale ones to handle. Utilising the continuity of the viewpoint movement and the relativity of fore-and-aft frames, it manages and attempers the terrain data leading to data decrease in a large range. This algorithm solves the problem of the rendering rate, and realizes a rapid real-time ramble in massive scale terrain scenes.

提出了一种基于视点的场景数据管理调度技术，有效地将海量地形转换为大规模地形进行处理，并利用视点运动的连续性和前后帧的相关性，管理调度地形数据，大幅度地降低了数据量，解决了绘制速度的问题，实现了海量地形场景的实时快速漫游。

The results indicate that the spalling behavior of oxide scale is the result of the inner and outer stress together,during rolling,the oxide scale cracks under the growth stress and thermal stress,at the same time the oxide scale also mainly undergoes alternative shearing stress in the rolling zone,the oxide scale spalls,then the reason of stripspalling is also analyzed.

结果表明：氧化膜剥落过程是内外应力联合作用的结果，轧制过程中氧化膜在长大应力和热应力作用下开裂，在轧制区内氧化膜还因受沿轧辊圆周方向的交变剪切应力作用而剥落。

Because defends external national the invasion, must need the quite firm fortification or the castle, therefore the ancient babylonian can not but use crops' as well as bushes and so on plant's the straw stalk makes the fuel, makes certain shape the soil to burn the quite solid brick bat to do for the main building material, uses for the building big city wall and the fortress, and displayed the acme, therefore only then north two river basin edge mountainous area, only then appeared certain scale stone system construction, but compared the ancient Egypt's stone system creation on "big Wu Jianxiao" Wu, because the soil burn brick or at that time burns the technical limit, basicIs unable to compare with the hard rock, although the brick uses, extremely nimble and may the rapid construction broad in scale building or the urban cluster, but radically is unable to achieve actually Shi Zhi constructs that kind of altitude as well as in time eternal degree, therefore is called by the historian the world ancient times one of seven wonders of the world "the airborne garden" has become on the ruins historical miracle, now only then also in continues in the decency the remnant brick to break the tile to relate once magnificently with glory, long-time, all vestiges could even more be not much left.

由于防御外来民族的侵扰，必须需要比较坚固的防御工事或者城堡，因此古巴比伦人不得不用农作物以及茅草等等植物的秸秆做燃料，把制成一定形状的泥土烧制成比较结实的砖块来做为主要的建筑材料，用来建筑高大的城墙和堡垒，并发挥到了极致，因此只有在两河流域北部的边缘山区，才出现了一定规模的石制建筑，但相比古埃及的石制创作就&大巫见小巫&了，由于泥土烧制的砖或受当时烧制技术的限制，根本无法与坚硬的岩石相比，虽然砖使用起来，非常灵活并可以迅速的建造规模宏大的建筑物或者城市群，但却根本无法达到石制建筑的那种高度以及在时光中的永恒程度，于是被史学家称为世界古代七大奇迹之一的&空中花园&就成了废墟上的历史奇迹了，如今只有还在继续风化中的残砖断瓦在诉说着曾经的辉煌与荣耀，更长久一点，一切遗迹就会更加的所剩无几了。

On the bases of investigating and grasping the materials about the AHPPEs, AHPPEs' developing situation is analyzed completely in this article on vertical direction of time order and horizontal direction of department, in the meantime, material buying process, capital's using rate, and product selling process are also analyzed completely. Pointing out because the differences of owning right among State-Operated Enterprises, Collectively Operated Enterprises and Privately Operated Enterprises, there are differences in the producing behavior and trade development.A. According to the theory of producer behavior, POEs is on the way from stageⅠto stage Ⅱ,economic interests increasing;COEs is on the end of stageⅡ,economic interests decreasing;SOEs on stage Ⅲ,economic interests is negatively increasing.Model analyzing method shows that scale economic doesn't exist in SOEs and COEs, but POEs is the reverse.B. Different owning right enterprises have great differences in the respect of capital scale,product making and selling processes, at last SOEs and COEs' economic interests is much less than that of POEs. Scale economic doesn't exist in SOEs and COEs, POEs have the potential of developing scale economic, furthermore, the new-coming horizontal in the horizontal structure have the good situation.

在跟踪调查掌握资料的基础上，文章对该区农畜产品加工企业的发展状况从时间序列的纵向和行业结构的横向进行了比较分析，同时又从原材料购买过程、资金的利用效率以及产品的销售过程等各个方面进行了全方位地剖析，指出由于企业存在着国有、集体和民营产权类型的不同，导致生产行为和行业发展存在着差异：A、生产者行为理论分析总结出，民营企业正在处于第Ⅰ阶段向第Ⅱ阶段的过度区，经济效益上升；集体企业处于第Ⅱ阶段的末端，经济效益下降；国有企业处于第Ⅲ阶段，经济效益负增长。B、不同产权企业在资金规模，产品的生产和售卖过程上存在着很大不同，最终导致国有和集体企业经济效益比民营企业要差得多，用模型方法分析得出结论：国有企业和集体企业都不存在规模经济，而民营企业存在规模经济的发展潜力，并且在行业结构中属于民营产权的新兴行业发展状况良好。C、行业间也存在着很大的不同：集体企业的优势行业是制酒、粮食加工和肉食品加工等行业；民营企业的优势在皮件类、服装、粮食加工和制酒等行业；国有企业当中食品加工、肉食品加工和食品冷库类是优势行业。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。