查询词典 low-lying area

Some possible applications of wide-area measurement system in power system are gathered up, including applications in static analysis, recording dynamic procedures of the whole power network and post-contingency analysis, identifying and calibrating the dynamic model of power system, transient stability prediction and control, voltage and frequency stability monitoring and control, analyzing and damping the low frequency oscillation, global feedback control, fault location and parameter measurement o...

综述了广域测量系统(Wide-Area Measurement System，WAMS)在电力系统稳态分析、全网动态过程记录和事后分析、电力系统动态模型辨识和模型校正、暂态稳定预测及控制、电压和频率稳定监视及控制、低频振荡分析及抑制、全局反馈控制、故障定位及线路参数测量等方面的应用。通过这些应用可以看到，WAMS给电力系统分析与控制提供了新的视角和解决方法，值得深入研究。

In 2000,the area below 400 meters was also watershed,mining sites and settlements,the proportion of both unutilized land below 400 meters and woodland between 400 meters and 800 meters raised a little,it showed that most woodland transform into the other types of land use in low altitude area,however,most unutilized land and the other types of land use transform into woodland in low and mediad altitude area,and the changes in woodland had metastatic trends in low and middle altitude area in the years from 1988 to 2000.The area proportion between 400 meters and 800 meters raised a lot in mining sites and settlements,the total distributed area on woodland had a trend of rising,while the distribution in pasture had a trend of decreasing.

在2000年，400m区域以下依然是水域和居民点及工矿用地，未利用地比例在400m以下有所上升而林地比例在400m～800m有所上升，表明在1994年至2000年间，低海拔地区许多林地转化为其他土地利用类型，而在中低海拔地区大量的未利用地和其他土地利用类型转化为林地，林地的变化有向中低海拔转移的趋势。2006年居民点及工矿用地在400m至800m区域面积比例增加，林地类型分布区域整体呈上升的趋势，草地分布区域呈下降的趋势。

objective to evaluate early signs of avascular necrosis of femoral head in adult by ct and to guide clinical treatment.methods the cases with suspicious diagnose of anfh were scaned in the both hip joints by x ray and ct to find the early signs of anfh with ct.results early signs of anfh using ct showed that, in 38 femoral heads 31 cases, there were radiate star shape of high density osteosclerosis of the trabeculae in 13 femoral head.twenty five femoral heads showed osteosclerosis and trabeculae structure disappearing and vague,incoordinately low ostedensity area and cyst change.there were fracture under the cartilage and light subsid in 5 cases.the cases in stage ⅰwere given decompression, while the pationtsresul in stageⅱand stageⅲ were given decompression and ostetransplant.conclusion ct results show that the sign of the high osteodensity and low osteodensity and cyst change can disply early anfh.

摘 要］目的：探讨成人股骨头缺血性坏死的早期ct征象并指导临床治疗。方法：对临床疑诊anfh的全部病例均行x线平片及ct检查，分析anfh的早期ct征象。结果：早期anfh的ct表现：31例38个股骨头，其中13个股骨头骨小梁呈放射状高密度的"星状征"，骨小梁境界清楚、锐利，属ⅰ期；25个股骨头表现为骨硬化，骨小梁结构消失、模糊不清，骨密度减低及囊性改变，属ⅱ期；并有5个股骨头在ⅱ期影像学改变基础上出现软骨下骨折及轻微塌陷，属ⅲ期。治疗结果：ⅰ期行钻孔髓内减压术，ⅱ、ⅲ期行钻孔减压植骨术。

Some of them with visual loss, optic papilledema and orbital mass. B-scan ultrasonography revealed a cyctic tumor and a strong echo spot with spontaneous movement. On CT scanning, found was a well-defined hyperdensity mass in which there was a low density area. On MRI, the signal intensity of T1WI of cystic fluid was low or moderate and of T2WI was high, while the signal intensity of T1WI and T2WI of surounding scar tissue was still low.

结果 22例有反复的眶内炎症史及占位性病变体征，如眼睑及结膜充血水肿，眼球突出，眼球运动受限；6例有视力下降和视乳头水肿，并扪及肿物。B超示占位性病变内有液性暗区及自发运动光斑；CT扫描示高密度块影中央部有低密度区；MRI检查示囊液信号强度T1WI为低或中信号，T2WI为高信号，其周围的纤维瘢痕组织T1WI和T2WI均为低信号。

The principles of remote sensing in earth scinences were used in the investigation of resources and environment of the region to analyze hydrologic elements, regionalize hydrologic environment types, calculate water-yield; study the ratio relationship among agriclutural landuse, non-agriclutural landuse and total area, point out the regional difference of landuse type;res-earch the qualitative and quantitative perfects of low-yield area environment; cornprensively investigate forest resources, including ecologic environment of the suitable-forest area, site and ecologic and economic perfects of suitable-forest tree; find out the travel circle surrounding Beijing and function regionalization, storage mechanism of mineral resources and crustal stability, evolution of natural environment in last ten thounsand years and the relationship between them and land harnessing, planning and city and town construction.

本区资源与环境的遥感调查应用，主要是运用遥感地学原理，分析水文下垫面要素，划分水文环境类型，计算其产水量；分析非农业用地与总土地及其它用地的比例关系，探索土地利用类型结构的地域差异规律；农业低产地环境及其数量、质量特征的研究；综合调查森林资源，包括宜林地的生态环境、立地条件及宜林树种的生态与经济特性；以及以北京为中心的京津唐旅游圈及功能分区，矿产资源的赋存机制，区域地壳稳定性及区内近一万年来的自然环境的演化规律及其与国土整治、规划和城镇建设的关系等进行了多元综合研究。

The Subinterval area median contrast filtering method that can recognize weak anomalies of the low-background area and high-background area resolves the problem.

子区中位数衬值滤波方法解决了低背景区和高背景区弱小异常的识别问题，克服了采用全区统一异常下限给异常识别带来的困难。

Low profile area on the contrary, such as graphic section area is greater than the empty part of the area, which by friction, an empty part of-that is, to be worn with hydrophilia, will gradually lost their lives, resulting in a low key regional locations nonanatomical surplas cause printing "" paste version appears.

不高调地区则与此互异，图文部不合面积大于空缺部不合面积，该地区一旦受到摩擦，空缺部不合的砂纲即被磨陡，不兵忽然毕命干火性，变成不高调地区网点的不法规放大，导致印品不入现&糊版&障碍。

It was different in the occurring time and quantity of dominant species: in early spring, there were more Psyllidaes in the dense planted area, but more main pests Opatrums and Scarabeidaes and their nature enemies Carabidaes and Spiders in the low planted area. After autumn, the quantity of Psyllidae was the largest in the low planted area, but the least in the dense planted area.

群落个体数稀植区在大部分时间内均高于其它2区。3个区的主要优势害虫及其天敌在发生时间和数量上有一定差异，早春密植区木虱发生数量较大，稀植区中砂潜、金龟子类害虫以及步甲、蜘蛛类天敌数量相对丰富，入秋后稀植区木虱发生量最大，密植区最小。

IEEE802.15.4 is a new standard uniquely designed for low rate wireless personal area networks.It targets low data rate,low power consumption and low cost wireless networking.The energy-efficiency and robustness of this new standard makes it a strong candidate to be a federating communication protocol for wireless sensor networks.

IEEE802.15.4作为一种专为低速率无线个人区域网络(low data rate-wireless personal areanetwork，LR-WPAN)而设计的低成本、低功耗的短距离无线通信新标准，为无线传感器网络提供了一种很好的解决方案。

Low German area of East West, the East Low German Low German gradually into the West ...

在东低地德语区的西部，东低地德语逐渐地变为西低地德语。。。。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。