查询词典 facilities location

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。

node location is one of the key technologies in wireless sensor network.rssi－based location is a hotspot in nowadays.for resolving biggish error in rssi－based location,the paper presents a new method of location,rssi－based triangle and centroid location,using triangle and centroid method to reduce the error of rssi measurement.simulation experiments prove that this algorithm can obviously improve the location accuracy compared to trilateration.

摘 要：节点定位是无线传感器网络中的关键技术之一。基于rssi的定位技术是现阶段研究的热点，为解决rssi测量方法定位误差较大的问题，提出一种将rssi测量方法与三角形质心算法相结合的新型定位算法，该算法用三角形质心算法减小rssi的测量误差。仿真表明该算法比基于rssi的三边测量法定位算法的定位精度有较大提高。

Shared facilities and equipment means the residential district or single houses, the construction cost has been assessed on entering the shared home sales prices up and down the main water pipeline legislation, water pipe, flue, water storage tanks, pressure pumps, boiler, elevator , antenna, lighting, power lines, heating lines, safety facilities, fire facilities, roads, green spaces, trenches, drains, ponds, wells, non-operating car garage, public sports facilities and shared facilities and equipment used in housing.

共用设施和设备是指住宅小区或单房屋，建筑成本已分摊进入房屋销售价格共用上下水管道的主要立法，水管，烟道，水箱，压力泵，锅炉，电梯，天线，照明，供电线路，暖气线路，安全设施，消防设施，道路，绿地，沟，沟渠，池塘，水井，非经营性车库，公共体育设施和共用设施和设备中使用的住房。

The state shall protect water projects and related facilities such as dikes and bank revetments, and shall protect flood prevention facilities, hydrologic monitoring facilities, hydrogeologic monitoring facilities, and navigation facilities and aids.

第二十八条国家保护水工程及堤防、护岸等有关设施，保护防汛设施、水文监测设施、水文地质监测设施和导航、助航设施，任何单位和个人不得侵占、毁坏。

Damaging or destructing water projects and related facilities such as dikes, bank revetments, etc., damaging or destructing f1ood prevention facilities, hydrologic monitoring facilities, hydrogeologic monitoring facilities, navigation aids and navigation facilities

一毁坏水工程及堤防、护岸等有关设施，毁坏防汛设施、水文监测设施、水文地质监测设施和导航、助航设施的

Damaging any water project or related facilities such as dikes and bank revetments, damaging any flood prevention facilities, hydrologic monitoring facilities, hydrogeologic monitoring facilities, or navigation facilities or aids; or

毁坏水工程及堤防、护岸等有关设施，毁坏防汛设施、水文监测设施、水文地质监测设施和导航、助航设施的

Four major aspects, i.e., traffic safety, function and service, disaster prevention and control and traffic control should be considered in the design of the traffic engineering facilities of highway tunnels, which consist of traffic signs and traffic mark lines, traffic monitoring facilities, ventilation and lighting facilities, trumpet call system, fire alarming system, fire fighting and escaping facilities, power supply and distribution facilities, central control and management system.

公路隧道交通工程的设计，主要从隧道交通安全、功能服务、防灾救灾和交通管理四个方面考虑，具体由标志和标线、交通监控设施、通风与照明控制设施、紧急呼叫设施、火灾报警、消防与避难设施、供配电设施和中央控制管理系统与设施等组成，介绍了设计的指导思想，解释了各内容的功能和作用，同时指出了设计中存在的问题。

Abstract］ objective to evaluate the distinctive clinical value of magnetic resonance urographymru）in the diagnosis of primary ureteral carcinoma.methods to compare the accuracy of diagnosis of mru with ultrasonography,urography,retrograde ureteropyelography and ct,diagnostic imaging and progress of ureteral carcinoma were analyzed in twenty-four cases from 2000 to 2006,twenty cases had mru examinations.the original preoperative diagnostic reports of various imaging facilities were analyzed on account of the results of operation and pathology.results mru could clearly show the obstructive location of ureter.with regard to the ureteral carcinoma,accuracy of the location diagnosis was 100%.mru was superior to ulstrasonography,kub+ivp,ureteropyelography and ct we used to apply.conclusion comparing with other diagnostic imaging facilities,it has an important value in highly efficient,accurate location,safe,noninvasive and so on with mru,which can be used to show the features of primary ureteral carcinoma and has a wider scope of clinical application.

目的 探讨磁共振水成像技术在原发性输尿管肿瘤中的临床诊断价值。方法分析2000～2006年24例原发性输尿管肿瘤的影像学诊断结果，并基于术中所见和病理报告，将磁共振水成像技术20例）与超声24例）、泌尿系造影24例）、逆行造影15例）、ct(19例）的确诊率相比较。结果 mru能清晰显示输尿管的梗阻部位，定位诊断准确率为100%，梗阻病因确诊率高于b超、泌尿系造影、逆行造影和ct检查。结论与其他影像诊断方法相比较，磁共振水成像在显示原发性输尿管肿瘤特征方面具有效率高、定位准确和安全无创等重要价值，而且有更广泛的临床应用范围。

The category location of Xi'an Shiyou University:teaching university; hierarchy location of running the school: give priority to undergraduate course, positively develop postgraduate course; special subject location: focus on project, take petroleum and petrify as characteristic, theory、project、economy、manage、literature、law、education more subjects develop harmonizly; cultivate talent location: culture strong basic、take delight in dedicatory appliance advanced special man that petroleum interest and area economy society need; service location: depend on petroleum,base on shan xi, facing to the western, serve nationwide.

西安石油大学学校类型定位：教学研究型大学；办学层次定位：以本科教育为主，积极发展研究生教育；学科专业定位：以工为主，以石油石化为特色，理、工、经、管、文、法、教多学科协调发展；人才培养定位：培养石油行业和区域经济社会发展需要的基础扎实、乐于奉献的应用型高级专门人才；服务面向定位：依托石油，立足陕西，面向西部，服务全国。

The main thrust of this dissertation is to develop the Application Specific Integrated Circuit of location identification for Wireless Sensor Network and to analyze the capability of location identification in existing hardware. Beside, this thesis will discuss a number of the location identification methods, such as TDOA, TOA and AOA, etc. By utilizing the time interval of propagating signal as my basic location identification parameter, this thesis examines the suitable location identification methodology based on the Wireless Sensor Network configuration developed within NTU. Some preliminary tests were performed to verify the performance of the newly developed system.

本论文主要目的在於开发适用於无线感测器网路的定位晶片和分析定位功能於现有硬体架构下之可行性，首先本论文中将介绍各种定位方法如TDOA、TOA和AOA等等，最终以量测无线电讯号於空气中传播之时间间隔作为定位架构的基本参数，并试著针对本实验室无线感测器网路的架构寻找适合的定位方式，并进行初步的测试。

Cable dampener cannot be rolled up but must be hung over the cable.

缆帆不能被卷起，必须保证处于展开状态

"This skylark is a present from my master," he says.

"这只云雀是我主人献上的礼物。"他说。