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目的 甲状腺岛状癌(ITC)，在临床上罕见，但具有高侵袭性。预防性中央区颈清扫术(CCND)对临床淋巴结阴性(cN0)病人的价值尚不清楚。我......
会议
Numerical study on scanning radiation acoustic field in formations generated by linear phased array transmitters in a fl......
To investigate fatigue crack initiation characteristics of Al-Zn-Mg alloy welded joint, notched specimens were used in f......
Slope Instability on Pyroclastic Deposits: Landslide Distribution and Risk Mapping in Zacapoaxtla, S
In October 1999, rainfall induced landslides devastated different communities of the Sierra Norte, Puebla, causing more ......
This paper mainly introduces some background information of lexis and grammar,against which several teaching methods is ......
Irrigation-induced soil erosion seriously affects the sustainability of irrigated agriculture. The effects of irrigation......
POSSIBLE RELATIONSHIPS AMONG SOUTH CHINA SEA SSTA, SOIL MOISTURE ANOMALIES IN SOUTHWEST CHINA AND SU
By using 1958-2001 NOAA extended reconstructed sea surface temperature(SST) data, ERA40 reanalysis soil moisture data an......
The classification of the world climates proposed by W. Koeppen is undoubtedly simple, definite and systematic. But as i......
Mr. Jia Yinsong, Deputy Director of the Bureau of Economic Operation ofNational Development of Reform Commission releas......
Soil erosion and land degradation are global problems and pose major issues in many countries.Both soil erosion and mass......
An ambitious program of High-Speed Railway (HSR) is under construction in China and already soon the network will overta......
From the point of view of application, the definition of hot spot was given first. The solid geophysical evidence sugge......
The behaviour of photoreaction occurring on the superfine duster interface of semiconductor CdS has been studied. The re......
I choose dog issue as the starting point of my paper，for I have seen many stray dogs everywhere and also some domestic do......
Niobium is widely used in SRF (Superconducting Radio Frequency) cavities due to its excellent superconductivity and work......
The Grid-point Atmospheric Model of IAP LASG version 2 (GAMIL2) has been developed through upgrading the deep convection......
In most developed countries the function of consu mption tax is mainly reflected in the organization of tax revenue, the......
介绍了美国联邦航空局、波音公司和空客公司的飞机内饰复合材料的阻燃标准以及不同国家和组织的轨道客车内饰复合材料阻燃低烟低毒......
Effects of Limited Water Supply and Ridge Plotted Field on Soybean Yield and Dry Matter Accumulation
The drought in spring leads to the lack of soil water, which influents sprout and bud of crops, which furthermore affect......
通过进一步分析采用全反式维甲酸（ａｌｌ ｔｒａｎｓ ｒｅｔｉｎｏｉｃ ａｃｉｄ， ＡＴＲＡ）诱导人肺腺癌 ＧＬＣ－８２细胞，经ｃＤＮＡ文库消减杂交构建的ｃＤＮＡ消减文库，得到一在ＡＴＲＡ诱导 ＧＬＣ－８２细胞分化过程中激活表达（ｒｅｔｉｎｏｉｃ ａｃｉｄ ｉｎｄｕｃｅｄ， ＲＡＩ）的......
鸳鸯线在工程、维护中是一个经典的话题,如何机制深入解析,缺少针对性的资料.同时,E1等底层传输问题因看似简单,不足以引起工程师......
From all-trans retinoic acid (ATRA)-treated human lung adenocarcinoma GLC-82 cells and control, subtractive cDNA library......
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
以云南某露天矿内排土场为研究对象,运用Geo-Studio有限元数值模拟软件中的SEEP/W和SLOPE/W模块,对排土场边坡进行降雨入渗过程模......
我国快速的城镇化进程中出现多种生态问题,主要表现在城市水问题的综合治理和利用。建设海绵城市是近年来政府、企业和学术界重点......
给出了拷贝机的系统结构及其特点,并对明室拷贝系统的设计原理和微电脑自控系统进行了分析、讨论、研究,最后给出了机盖举力P。......
为了明确华北平原夏玉米区域生产潜力的气象要素影响层次,在中国科学院禹城综合试验站进行了夏玉米田间试验,利用Licor-6400便携式......
文章通过太原铁路局梳理掌握中国铁路总公司信息系统建设的要求,从硬件、软件等方面进行了铁路信息系统的建设,从加强信息用户管理......
Spatial-Temporal Distribution of Summer Extreme Precipitation in South China and Response of Tropica
In the study, the summer extreme precipitation in South China is divided into early rainy season (MJ) and late rainy sea......
为探究公路铁路活载对三塔超大跨公铁两用斜拉桥结构的影响,以某公铁长江大桥为研究背景,建立有限元全桥模型。利用影响线确定活载......
随着GPS技术的日益成熟和研究的不断深入,GPS的定位精度得到了大幅度的提高,为其在测绘、交通、林业资源、石油勘探、精细农业等行......
围绕增加投资促进农民增收的问题阐述了农业投资的基本目标、扩大范围、调整支持对象，以及采取多种投资方式、提高投资效率和完善法......
降雨衰减是影响Ka波段卫星通信系统传输质量及系统性能的主要因素之一。为了保证卫星通信链路的传输质量，根据我国的降雨统计数据，计......
随着我国客运专线建设和运营进程的加快,有必要构建促进铁路技术创新的人力资源孵育模式。客运专线人力资源是一种特殊的铁路运输......
褐马鸡（Ｃｒｏｓｏｐｔｉｌｏｎｍａｎｔｃｈｕｒｉｃｕｎ）是我国一类保护动物，世界濒危物种．建立自然保护区和动物园饲养是保护濒危动物的有效措施．因此，了解在不同生态环境中褐马鸡生理......
报道了四川省虎耳草科梅花草属新记录种甘肃梅花草,该植物分布于邛崃山脉南端的洪雅县.这一新发现,丰富了四川省的生物多样性资料,......
最近几年,由于我国经济快速发展使得铁路建设的里程不断扩大,物联网技术也随之趋于成熟。在当前,铁路系统完全能够使物联网技术在......
“一带一路”倡议为我国铁路发展带来机遇和挑战,从健全进出口物流通道网络、推进跨境电子商务迅速发展等方面为中欧班列开行提供......
The state-owned Qunfeng Machinery Works is a specialized factoryunder the Ministry of Aviation and Space Industry manufa......
利用常规气象资料，分析了2009年2月12～13日抚顺一次历史罕见雨转暴雪天气过程的环流背景、影响天气系统、卫星云图和雷达资料，并对数......
在分析天津市区暴雨时空分布特征的基础上，建立了市区暴雨公式，推求了设计暴雨过程。结果表明：天津市实测最大点雨量主要集中在7月下......
一单个模型，短期，整体预报系统(大气的物理的研究所，地区性的整体预报系统，国际机场裁判员)与 15-km 格子间距，与 11 个整体成员一起与......
利用ITU-R数据库地面视距链路和地空链路雨衰减数据,分析了传统雨衰减预报中所使用的基于柱状雨胞模型的雨衰减物理模型导出的路径......
It is a challenge to evaluate the conditions of railway track without interruption of regular traffic. In this paper, th......
选择内蒙古乌达煤田火区中的18号火区作为研究区域,对浅层测温数据进行分析研究,分别量化分析了降水量、气温、风速3个气象要素与......
使用年限长的煤矿斜井容易出现断面减小的情况，要花费大量的人力物力扩充断面。通过对煤矿斜井提升系统的分析，提出了单线轨道双钩提......
由于技术与组织创新,美国的大企业首先在铁路部门崛起.大企业在铁路行业崛起有其特定原因和条件.大企业崛起后,美国政府对大企业的......
降雨的时空分布对于整个水文过程起着至关重要的作用。降雨喷淋控制系统作为包气带土壤水分运移规律水文物理模拟试验平台的重要组......
