向地地

All these characteristics can extend frequency band , reduce antennaelectric size and improve impedance characteristics. In order to miniaturization ofantenna, impedance complete compensate and matching optimization of electricallysmall antenna are brought forward, and this method is applied to the discage antennas.

从阻抗特性和辐射特性的实测数据表明，水加载单极振子天线的谐振频率能很好地向低端下移，局部水加载单极圆锥天线在保持原有宽频带特性的前提下，以较少的效率损失实现了较大范围向低频区扩展，即天线小型化，这将为短波超短波波段天线进一步的小型化设计提供很好的思路。

Based on the achievements and developm ents in studying natural gas hydrates at home and abroad,the mechanism of causi ng the oil and gas reservoirs to be tightly sealed by the natural gas hydrates i s systematically analyzed in the paper through discussing the formation mechani sms,evolution properties and distribution laws of the natural gas hydrates.In li ght of the research on their control effects on petroleum accum ulation and reservoir preservation,several geologic models of oil and gas accumu lation and preservation related to the natural gas hydrates are proposed,such as vertically and laterally screened models,screened-by-drape and screened-by- contact models and syngenetically and epigenetically screened models,etc.

以国内外天然气水合物的研究成果和进展为基础，通过讨论天然气水合物的形成机制、演化特征以及其分布规律，系统分析了天然气水合物可以得天独厚地封盖油气藏的机理，探讨了其对油气藏尤其是气藏聚集和保存的控制作用，提出了天然气水合物聚集和保存油气的多类地质模式，如垂向遮挡和侧向遮挡、披覆遮挡和接触遮挡以及同生遮挡和后生遮挡等。

Considering the limits of RDSS in active positioning mode,such as poor security,limited capacity,and inability to continuously provide position,velocity and attitude outputs,a technique of tightly coupled RDSS /SINS integrated navigation system is proposed for land vehicles by utilizing the time differenced carrier phase of 3 geostatic satellites.

针对北斗系统有源定位方式保密性差、用户数目有限，不能提供连续的位置、速度、姿态信息的问题，提出利用北斗系统3颗地球静止卫星的载波相位时间差分信息，与车载捷联惯导构成紧组合导航系统，通过扩展卡尔曼滤波器估计并修正惯导系统的速度误差；引入载体的侧向和天向速度约束，改善了速度估计精度；结合北斗系统的伪距信息，消除了长航时条件下位置误差的积累；推导了滤波器观测方程，对组合导航滤波器进行了设计；通过车载实验进行了验证，实验结果表明，速度误差和位置误差的积累受到了有效地抑制，精度满足陆地战车导航的要求。

S Broad asphalt along the main road, followed by the array of more than 30 of its significant interest in large, medium and small Recreation: If the crazy "roller coaster" in the air on the track and came to a series of somersaults, and let you experience a soul-stirring centrifugal, rapid rotation of panic, can be done to stimulate;"fast scooters" in the track km On the fast, as Shirupozhu dive 30 meters high slope, Huer mad to Jixuan, feelings like Cloud Nine fall, as if riding a bull at running back; in particular, the addition of new large-scale projects,"Challenger Tour" Mars will give you the speed of excitement around the world,"wind speed," you over 10 meters in height, during which around and up and down several times before and after the turnover, there is a non-feet under the ultimate experience weightlessness; and the "monster House "is another boost fan, pitch dark, cold wind gusts, desperate calls and setting of zombie ghosts and volatile side of the creeps you scared, scared; 50 meters out to the" Ferris wheel "to let you enjoy the" List Small hills,"the sense of endless;" Liu Yong Jin,"When you enjoy the" drift "Huiguoshenlai no sense, as water spilled from the mountain 10 meters high fly drift down the moment, the heart Has been hanging in the air to the; also hit eyeful of Venus "bumper car"; as the mischievous people Shuaixiang half-empty,"Spider-Star,""rotating aircraft" and "forest mouse car," and so on, you will be able to bring a Although the stimulus was accompanied by tears, but more interest is the doubling of the situation, a test of your willpower.

沿着宽阔的柏油大马路，依次排列着三十多个各显其趣的大、中、小型游乐项目：如疯狂&过山车&在凌空的轨道上急转直下而又接连翻腾，让你经历一场惊心动魄的离心、快速旋转的恐慌，可谓极尽刺激；&快速滑行车&在千米的轨道上风驰电掣，势如破竹般俯冲三十米高坡，忽儿狂转急旋，那感觉仿如九霄云外下坠，又好象骑在蛮牛背上狂奔；特别是新增设的大型项目&挑战者之旅&将带给您火星绕地球的速度快感，&极速风车&，你凌驾十米高空中，其间几度上下左右和前后翻转，真有一种双脚无着下的终极失重体验；而&妖怪屋&又是另番刺激，伸手不见五指，寒风阵阵，绝望的叫声和出没无常的僵尸鬼面，吓得你毛骨悚然，胆战心惊；拔地五十米的&摩天轮&让你享受&一览众山小&的无垠感觉；&激流勇进&，当你优悠的&漂&感还没回过神来的时候，高山泻流水般从十米高处向下飞漂的那一刻，心已悬到半空中了；还有撞到满眼金星的&碰碰车&；恶作剧般把人甩向半空的&星际蜘蛛&、&旋转飞机&和&森林老鼠车&等，都能将你带到一个虽然伴有被刺激后的泪花，但更多的是兴致倍增的境地，考验了你的意志力。

The rock belt are composed of malignite, nepheline gabbro, shonkinite, diopside-sienite, hornblende sienite, amphibole-monzonite,granodiorite-granophyre, kaligranite-porphyry, fraidronite, kersanton, precious garnet, olivine alkali-lamprophyre, alkalic-pyroxenolite, alkalic-basalt, latite and trachyte. And the lithofacies of the potassic rock zone include plutonic intrusion, hypabyssal intrusion and eruption.

本文的研究范围是哀牢山-金沙江钾质碱性岩带，该带位于我国西南三江地区的扬子板块和中缅板块三江褶皱区间的缝合带和多个地体边界带，由喜马拉雅期钾质富碱岩浆岩组成；从北往南由新疆塔什库尔干→沱沱河沿→青海囊谦→西藏江达→云南剑川→下关，向南到金平，中国境内该岩带延长达3700km，且向南延至越南境内，平面上岩带呈反&S&形的线形分布特点。

Secondly, the more complex inner and outer flow field is simulated around axisymmetric body with pump-jet (including no tip-clearance flow) with stator and rotor, and the numerical results are approved reasonable and inerratic by the contrast of the thrust and torque of rotor and stator to the experiment under the unself-propelled and self-propelled conditions.

紧接着，分析了推进器在非自航状态和自航状态下的性能、导管内部轴向、径向和周向速度场、压力场在相互作用中的具体形态和结构，并定性地分析了它们对水动力噪声、空泡生成以及振动的影响，为减少这些不利影响明确了解决的办法，为泵喷推进器的工程设计提供了切实可行的理论分析方法和技术思想，对工程实际具有重要的指导作用。

Results show that there is remarkable correlation between the land use types and SOM. From1981 to 2000, the content of SOM increased in the whole area mainly because of the transformation from virgin grass land to cultivated land and increase of irrigable land. The average content of SOM increased by 28% and increased from 9.64 g/kg to 12.35 g/kg. Then the household changed their land use way by driven of interest and do not increase additional input anymore.

研究结果表明：土地利用类型及土地利用方式的转换对土壤有机质含量产生重要影响。1981～2000年，荒草地向耕地的转换以及因灌溉设施的完善而引起水浇地面积的增加使得整个研究区域土壤有机质含量普遍增加，有机质含量平均值从9.64 g/kg增加到12.35 g/kg，增加了28％；在利益的驱使下，农户改变了土地利用方式，不再向种植粮食作物的土地追加投入，研究区域土壤有机质含量平均值由12.35 g/kg降低到11.46 g/kg（2000～2006年）。

On the basis of analyzing the ground motion and the character of landslide failure at meizoseismal area,the example of landslide with horizontal and vertical super earthquake inertia forces was calculated using residual thrust method.

以&5·12&汶川8.0级特大地震为契机，对极震区内的地震动特点进行分析，结合极震区内滑坡的破坏特点，并运用剩余推力法对同时考虑水平向和竖直向地震力的滑坡进行算例分析。

The Cretaceous sedimentary rocks were baked by the basaltic lava flow erupted in the Early Miocene, contracting in volume owing to loss of water contained mainly in the clays of the clastic rocks, and thus forming the columnar jointing. According to the occurrences of jointing and the sedimentary strata the authors calculated the two different rotations of the Mellit block: the block tilted toward 338° for 18° from Late Cretaceous to the beginning of Miocene, and tilted toward 138° for 18° since Miocene.

可以合理地假定柱状节理在形成时是垂直于大地基准面的，根据柱状节理和沉积岩层的产状，笔者计算出Mellit地块的两期旋转事件：自晚白垩世初期到中新世初期该地块向338°方向倾斜了18°，而自中新世以来又向138°方向倾斜了18°。

In US discussions of health reform, there has been an overconcentration on the Canadian system-a system of public health care that makes it very hard to have private medical care-whereas in Western Europe the national health services provide care for all but also allow, in addition to state coverage, private practice and private health insurance, for those who have the money and want to spend it this way.

在美国关于健康改革的讨论中，人们过多地关注了加拿大的体系--加拿大的公共健康服务体系，让私人医疗服务很难存在--然而，在西欧，国家健康服务，向全民开放，同时，也允许在国家保障之外，存在私人服务和私人的健康保险。这些私人的服务向那些有钱并想这样花钱的人们提供。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。