底层的

Excitation-Emission Matrix Fluorescence Spectroscopy was employed to study fluorescence characteristics of chromophoric dissolved organic matter readily released from sediment particles during episodes of resuspension, and bottom waters and surface sediment pore waters were compared in all corresponding sites.

对采自厦门湾九龙江入海河口的4个沉积物样品进行了室内再悬浮模拟实验，利用荧光激发－发射矩阵光谱研究了再悬浮过程中从沉积物中释放出的有色溶解有机物的荧光特征，同时通过与相应站位沉积物间隙水和底层水的对比分析，探讨了河口近岸海域的沉积物再悬浮作用作为水体中溶解有机物来源之一的可能性。

One of their crucial functions is to make up the error recovery due to the deteriorative channel transmission conditions, provide better links condition to the transmission control protocol of upper layer. Then, the study of RLC and MAC two layers retransmission mechanism is very important to whole wireless system.

这两层有一个重要的作用就是弥补无线通信系统中信道条件不理想或底层不理想造成的传输错误，为上层的传输协议提供性能良好的链路环境，提高上层数据业务在无线传输通信系统中的性能，因此研究RLC和MAC层的重传性能对整个无线传输系统是很重要的。

Simulation results verify that insulated board can effectively protect the heat from transferring into the foundations, and the frozen table is always around the lower bottom of the boards; the position of the frozen table with insulated boards is higher than that of without; the embank- ment formation has a better effect on the center of embankment, the shoulder and toe of the roads than others; after consideration of the construction effect, the best lay out of the insulated boards is higher than the position of natural ground surface to 0.3-0.6 m; this formation of the embankments is the right effective constructer to be used in the permafrost on the Qinghai-Tibet railway.

通过数值模拟可知：保温板能够有效地阻止热量由路基面向下传入地基中，使0℃等温线始终在保温板底层；复合路基多年冻土上限的位置要比无保温板时的高；该结构形式对路基中心、路肩和坡脚下的多年冻土上限抬升的综合效果更好；考虑施工条件后，复合路基在保温板铺设距离天然地面之上0.3~0.6 m对于路基稳定性最为有利；该路基结构形式为青藏铁路多年冻土区路基的理想结构形式，有利于克服全球变暖的影响。

The extremities were titanic, and there was no response to touch stimulations.Our results suggested that Pentobarbital sodium inhibited neuronal firing through GABA_A receptors, therefore the local field potentials and neural firing rates were inhibited; Urethane acted on many kinds of receptors including inhibitory and excitory ones, so the local field potentials did not change significantly; however, because of the multiform receptors on the neurons, the changing of firing rates to different neurons were not the same; Ketamine mainly acted on the NMDA receptors, therefore the local field potentials and neural firing rates were enhanced, and most neural firing rates would be increased.

从这三种麻醉剂的底层作用机制来看，戊巴比妥钠通过作用于GABAA受体对神经细胞发挥抑制性作用，因此表现为场电位和神经元放电的降低；氨基甲酸乙酯同时作用于多种受体通道，既有兴奋性受体，也有抑制性受体，因此，对场电位的影响不大，但对单个神经元来说，每个神经细胞上的受体通道分布差异较大，因此，单个神经元的放电频率变化会有所不同；盐酸氯胺酮主要作用于兴奋性的NMDA受体，故整体场电位活性增加，多数神经元的放电频率也会有所升高。

The thesis is divided into four parts to discuss the topic of the broken " American Dream " in the works of Dreiser.In chapter one, Sister Carrie, Jennie Gerhardt and An American Tragedy is the research object to analyze the broken " American Dream " of the lower class deeply which are constituted by the broken " American Dream " of the strivers, the passivist bearing fate, the lovers and the injured.

本文从以下四个部分描述、分析德莱塞笔下破碎的&美国梦&：第一部分以《嘉莉妹妹》、《珍妮姑娘》与《美国的悲剧》为研究对象，(来源：A20BC论文网www.abclunwen.com)分析底层人物破碎的&美国梦&，分成个人奋斗者破碎的&美国梦&、逆来顺受者破碎的&美国梦&、爱情奉献者破碎的&美国梦&与被异化者破碎的&美国梦&四种类型。

The results from the study on characters of phosphorus section distribution show that there are obviously ascending of phosphorus content in the surficial sediments and pore water.

以密云水库为例，研究了水库沈积物中有机质的含量与有机磷的关系，表明表层沈积物中的总有机碳和有机磷的含量都明显高於底层，是由於一些以磷为营养素的富营养化指示藻类在水体中逐年增加，它们死亡后的残骸经分解－矿化后在底积物中累积的结果。

The preferred orientation degree of Ag films show significant change with prologing deposittion time and decreasing substrate temperature.The upper layer of Ag films deposite...

结果表明：银膜的择优取向度随着沉积时间的延长和基体温度的降低具有明显变化；在—147℃沉积6min条件下制备的银膜为表层具有(200)择优取向及底层为(111)择优取向的双层结构；银膜在载荷较高时也有较好的摩擦学性能。

After heat treatment for 25h and 50h in air, the r phase showed an anisotropy on XRD pattern. The molar fraction of the r " phase formed at the interface between the substrate and the bond coat was calculated and the profile of composition of all elements was modeled after considering the change of heat treatment temperature and time.

多元合金的基体和热障涂层的扩散和界面反应，用相平衡热力学Thermo一ca1C和相变动力学D工CTRA软件对基体/底层界面Y'相的摩尔分数以及整个试样中各元素的成份分布随温度和时间的变化进行计算，计算结果与实验结果有很好的吻合。

In the paper chapter one introduces the background and significance about designing the GPIB controller based on Ethernet. Chapter two describes the whole design idea of the controller, at the same time, introduces ENET protocol, TCP/IP protocol and other associating protocols. Chapter three discusses the hardware and firmware design of ENET-GPIB controller. Chapter four describes how to realize the dynamic link library functions and VISA functions of the controller. Chapter five collogues the trend of ATS. Chapter six summaries the design and give some experience and advice about scientific research.

本文第一章讨论了设计基于ENET 总线的GPIB 控制器背景意义，第二章大致描述控制器的整体设计框架，并简要介绍ENET，TCP/IP 等相关协议；第三章阐述了ENET-GPIB 控制器的硬件电路及底层固件的设计与实现；第四章阐述ENET-GPIB 控制器动态链接库函数和VISA 控制函数的实现；第五章畅谈自动测试系统的发展趋势；第六章对整个ENET-GPIB 控制器设计进行总结，并给出了个人的科研心得体会。

Yun-strip method, the circle-shaped bath temperature higher than the crescent-shaped article transport transport of temperature, the temperature was higher than the crescent-shaped article transport serrated Article transported bath temperature, in the 12mm flat bottom welded seal, using serrated transport of , and with the magnitude and the swinging groove on both sides of the pause, effective control of the bath temperature, so that pore size of the melt is essentially consistent with the roots do not form a welding groove tumor and decrease the chances of burn-through, no penetration has The improvement of the peace panels of the single-sided welding butt welding flat-sided shape is no longer difficult.

运条方法，圆圈形运条熔池温度高于月牙形运条温度，月牙形运条温度又高于锯齿形运条的熔池温度，在12mm平焊封底层，采用锯齿形运条，并且用摆动的幅度和在坡口两侧的停顿，有效的控制了熔池温度，使熔孔大小基本一致，坡口根部未形成焊瘤和烧穿的机率有所下降，未焊透有所改善，使乎板对接平焊的单面焊接双面成形不再是难点。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。