等径的

But this kind of open emission and reception system in High frequency communication has to face two challenges: firstly, natural interference from atmospherics and industry; secondly, tracing, blocking and multipath interference from enemy.

但这种开放式的发射和接收电磁波的通信，特别是在短波通信领域，不仅易遭到天电、工业等自然干扰，而且还要遇到敌方人为的跟踪、阻塞干扰以及多径等各种干扰。

The change of R has also effects on hygroscopicity, thermodynamic stability, glass transition temperature and mechanical strength.

DMPA用量及R值的改变会影响乳液的外观、粘度、平均粒径、稳定性、固化速率等性能。R值的改变还会影响胶膜的吸水率、热稳定性、玻璃化温度、力学性能等性能。

The effects of impeller types, baffles, gas sparger, rotational speed, gas volumetric flow rate and particle fraction on mixing time were systematically investigated in three-phase gas-liquid- floating particle systems by measuring the temperature difference using thermocouples.

在釜径386mm的搅拌釜内，采用热电偶温差法考察了搅拌桨型、挡板、气体分布器等结构因素和转速、气量、颗粒分率等操作因素对自浮颗粒三相搅拌混合的液相混合时间的影响。

The effect of flow rates, initial concentrations, resin bed heights, its height/ diameter ratios and temperature on breakthrough curves of sulfuric acid/2-naphthalenesulphonic acid, 2-naphthalenesulphonic acid/sulfurous acid and sulfuric acid/ 2-naphthalenesulphonic acid/sulfurous acid systems was investigated. Excellent agreement was obtained between experimental data and the suggested breakthrough data model, with which the breakthrough curves can be accurately predicted for multi-component adsorptive separation in resin bed, the experiment of adsorptive separation may be scaled up, and the plant may be designed.

考察了流速，初始浓度，床层高度，床层高径比，温度等因素对硫酸-2-萘磺酸，2-萘磺酸-亚硫酸和硫酸-2-萘磺酸-亚硫酸等混合体系穿透曲线的影响，所建立的穿透曲线模型与实验结果拟合较好，模型可较准确预测多组分吸附分离的穿透曲线，可用于指导吸附分离实验的放大以及装置的设计。

Recently, of the wireless channel transform operations, especially in the future wireless transform system such as 3G, 4G and wireless LAN with the operation of image and video, because of the wireless channel characteres such as signal fading, multi-way reflection and so on, traditional coding methods become more and more unfitting.

在近来的无线信道传输业务中，特别是在将来的3G、4G以及无线局域网等无线信道传输系统中的图像乃至视频传输业务中，由于无线信道的信号衰落、多径反射等诸多特点，使得传统的编码方法越来越难以胜任。

The results show that, by the way of optimizing preparation condition, the spherical zirconia powders with suitable particle size distribution are prepared using chemical precipitation method. Using heterogeneous chemical precipitation coating technique, the sph, erical nickel coated zirconia powders are prepared and the heterogeneous nucleation can be done on the surface of spherical zirconia powders. The thickness of coated layer, homogeneous degree and crack of surface can be controlled by the way of controlling powder concentration, adding rate of reactants feeding and adding surface active agent.

研究表明，采用化学沉淀法，通过优化制备工艺条件，可以制备粒径分布较均匀的球形氧化锆粉体；利用非均相化学沉淀包裹技术制备的金属镍包裹氧化锆微球粉体，球形氧化锆颗粒表面作为异相成核的场所，通过控制颗粒浓度、加料速度以及添加表面活性剂等工艺条件，可以调控包裹层厚度、表面均匀度以及表面裂纹等。

The field experiments on the secondary flow developed on the lee side show that there are strong sand transport potential at the lee side of the dunes near the surface because of the decreasing of the sand grain size and the other factors. The transport directions are nearly vertical to the dune trends. Those factors and the sand slumping on slip face, and the sand transport processes on the stoss slope make the transverse dunes maintaining their morphology under the advance processes.

对沙丘背风坡发育的二次流的野外观测表明，近地面一定高度内沙丘背风坡气流仍有一定的强度，由于背风坡的沙丘沙粒径较小等因素，背风坡气流仍保持一定强度的输沙率，输沙方向与沙丘走向基本上垂直，这种作用与沙物质向背风坡崩落、迎风坡的输沙过程等共同作用，因而使横向沙丘在运动中保持其形态。

However, fully consideration of special structure and physiological function of CRP is critical to investigate whether CRP provide protect effect or pathogenic effect in the progression of atherosclerosis. CRP is a member of pentrxins family, which consists of five identical, noncovalently associated 23-kDa protomers arranged symmetrically around a central pore with a 102 A external diameter. Each protomer has a recognition face with a phosphocholine binding site consisting of two coordinated calcium ions adjacent to a hydrophobic pocket. The opposite face of the pentamer is the effector face, where complement Clq binds and Fc receptors are presumed to bind. A cleft extends from the center of the protomer to the central pore of the pentamer. Both faces ofpentamer form a special bi-phase structure: one face is the ligand recognition phase, which can recognize apoptosis cells and enzyme modified low density lipoprotein in which PCh is exposed.

CRP是一种五聚体蛋白，外径为102 A，由5个相同的单体以非共价键结合，形成双面的环形结构，每个单体的配体识别位点或受体结合位点分别位于五聚体两个平面上，分别组成配体识别相和效应器相，从而构成特殊的二相性结构：一面为配体识别相，含有磷酸胆碱(phosphorycholine，PCh)结合位点，能够使CRP识别在病理条件下暴露出PCh的凋亡细胞、酶修饰低密度脂蛋白(enzyme modified low density lipoprotein，E-LDL)等。E-LDL是天然低密度脂蛋白(native Low density lipoprotein，N-LDL)在多种蛋白酶，如胰蛋白酶、神经氨酸酶、胆固醇酯酶等作用下的代谢产物，其主要特点是结构发生改变(N-LDL大小均匀，平均直径250±30 A，E-LDL大小差异极大，直径为100-2000 A)，暴露磷酸胆碱位点，能够被CRP识别；另一面为效应器相，能够与巨噬细胞、单核细胞表面受体FcγRⅡa结合，介导巨噬细胞、单核细胞识别及吞噬凋亡、坏死细胞作用。

In order to carry on closure safely, reliably, high-efficient and scientifically, it is necessary to carry on computation and analyze to various kinds of situations that may appear while closuring, especially to the change of the hydraulic parameters and the ascertain for the throwing particle-size, hold the key factor among them, carry on the planning, design and construction meticulously, carefully, guarantee the project progress and security.

为了能安全、可靠、高效、科学地实施截流，有必要对截流中可能出现的各种情况进行计算分析，特别是截流过程中的流速等水力参数变化及其抛投料粒径确定等问题作详细的计算研究，把握其中关键性因素，精心、周密地进行截流工程的规划、设计与施工，确保工程进度与安全。

The fertilizer test base on three aspect of grain size、growth velocities 、rate of the green parts, the result present that IBDU multiple fertilizer is bigger grain size and quirkier hydrolyze rapid and more short release period than UF multiple fertilizer, which work easier burning spot on grass leaf of Green lawn; on aspect of growth

肥料对比试验中，进行了颗粒大小、生长速度和绿叶率变化等三个指标的测试，结果指出IBDU技术肥料相对UF技术肥料在沙土环境中具有水解速度快，养分释放周期短等特点，并且大颗粒的IBDU技术肥料容易在水解过程中对果岭草坪产生灼烧性斑点，而对比试验使用的UF技术肥料由于粒径较小相对克服了此点不足；在生长速度和绿叶率变化方面，IBDU果岭均提前于UF果岭达到生长高峰和全绿率，也提前下降生长速率和绿叶比值，试验最终IBDU果岭的日生长量和绿叶率均明显低于UF果岭的数值。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。