较弱的

To solv e this problem, a circular correlation method based on FFT for C/A code acquisition was discussed. To improve SNR in weak signal environments, this text put forward a modified acquisition by circular correlation. The analysis and simu lations indicate that the method can make the perˉ formance of acquisition in low SNR improved and verify its validit y.

针对弱信号环境下低信噪比的情况，研究了适合该算法的解决方案，并提出改进的捕获算法，理论分析与实验结果证实了该方法在弱信号环境下具有较好的捕获性能，并能大幅度减少捕获时间。

The main environment geological question is: The earth"s crust where the faultage and earthquake are active is unstable; collapse , landslide, mud-rock flow and soil erosion ; The underground karst subsides, seepage question; Basic rock expand, expend and compress soil body, the salt deposit corrode out of shape and groundwater"s corrodent harm; The soft soil question of basin; The soft rock body, cracked rock and the weathering rock are relatively poor stability; High and cold regional highways and railways" frozen soils freeze and melt calamity problem; The around rock of tunnel are unstable because of the coal seam gas, spring water, underground developed area; Project cutting slopes, constructed abandon soil and reservoir, lake"s ecology geological environmental protection issue; Thedangerous shoal of the channel % submerged reef question; The problem of rebuilding channel project and dock etc.; And the problem of unstable ground and groundwater corrosivity during building airport; At the same time, with the international big pathways" implementation and completions of constructions, adjusting the cities and counties" constructions , the crowd occupy changing , the cultivated land distribute changing and the adjustments of structure, will cause local environmental geological issues outstanding; According to multiple statistical analysis , value calculate and integrated appraise result, in the northwest and southwest of Yunnan, the traffic relatively low density, traffic engineering is relatively weak impact on environment, It is the area where a environme

主要的环境地质问题是：活动性断裂、地震带的地壳不稳定；崩塌、滑坡、泥石流及水土流失；地下岩溶塌陷、渗漏问题；基础岩体膨胀、胀缩土体、含盐层侵蚀变形和地下水的腐蚀危害；盆地软土问题；软弱岩体、碎裂、风化岩体稳定性较差；高寒地带公路、铁路建设的冻土冻融灾害问题；煤层瓦斯、涌水、地下采空区等隧道围岩不稳定问题；工程切坡、施工弃土及水库、湖泊生态地质环境保护问题；航道险滩、暗礁问题；渠化工程、码头等库岸再造问题；以及机场建设中的不稳定地基及地下水腐蚀性问题；同时，随着大通道建设的实施和完成，城镇建设的调整、人群居落的变化和耕地分布及结构的调整组合，都可能造成局部环境地质问题的突出等等。经多元统计分析数值计算、综合评价结果，滇西北、滇西南地区交通密度较低，交通工程对环境的影响程度较弱，是环境地质状况好的区域；有主要高原湖泊分布区的，包括昆明、个旧、文山的滇东南区域，环境地质状况较好；大姚、楚雄、篙明及会泽、昭通一镇雄的区域，即滇中北部中生界红层和滇东北岩溶区，环境地质状况中等；而包括保山、德宏、大理、临沧的滇西地区及景东一墨江以东、双柏一石屏一河口以西及东川一寻甸一曲靖地段的滇中一滇东地区，环境地质状况较差。云南国际大通道建设涉及全省区域，如何利用地质环境、实现可持续发展，就必须依赖于国际大通道建设与地质环境之间良性关系的建立。应本着对区域地质环境客观存在的科学认识原则、建设过程中环境效益优先的可持续发展原则、法制性原则、对大通道建设中环境地质的因地制宜及其可防治性原则。并且从组织管理、不同类型大通道、不同环境地质问题类型等方面，提出了对策措施。最后，提出了建立国际大通道建设与环境地质良性关系的宏观建议。

The endurance to Nicosulfuron of different varieties of com is much diversified. Dent corn shows more endurance , hard corn shows less endurance .

玉米不同品种类型表现出对玉农乐的耐性差异较大，马齿型玉米对其耐性较强，硬粒型玉米对其的耐性较弱。

The purity of SAM product was higher than 95％, and the overall recovery of SAM sulfate and SAM double salt of sulfate and p-tosylate were 60％ and 50％, respectively.

通过筛选，获得了对SAM有较好选择性离子交换能力、较易洗脱和再生的争光D113弱酸型阳离子树脂，研究了温度、pH等对SAM离子交换的影响，根据SAM在弱酸阳离子树脂D113上的等温交换平衡行为表现出较强的可逆性，考虑到交换基的弱电解质性质以及结合Donan膜平衡理论，建立了考虑pH影响的可逆离子交换平衡模型，该模型可以较好地描述SAM平衡浓度、pH对离子交换平衡的影响；通过对动态离子交换过程的研究，得到了SAM在D113树脂内的有效扩散系数的数量级为1.0E-9cm〓/s～1.0E-8cm〓/s。

When heterotrophic bacteria were washed out while autotrophic bacteria were accumulated, the sludge mainly was bacilliform floccule, but the sludge was petallike when the steady nitrification was set up and part nitrogen removal function was reached. The lack of organic carbon source made autotrophic bacterium become the dominates and the microbial community structures become simple.

经过成功启动并稳定运行后，单级自养脱氮系统内随着反应器内有机碳源的减少，系统中自养细菌在同异养细菌的竞争中逐渐占据优势地位，适应能力较弱或对有机碳源量要求较高的异养细菌则被大量淘汰，微生物群落结构与接种污泥相比已变得简单且较稳定，种群多样性降低。

This may be due to hydrolytic chelating, precipitation and the sediment or hydrobioes attachment, absorption etc. The honewort had stronger ability of accumulating La because of its large leaf surface that could attach La. The accumulating ability of snail and fish to La was relatively weaker but some organs of them had higher contents of La especially in the intestines, shell of snail, and in gill, internal organs, scales, head, bone of fish, rare in muscle. The total accumulating quantities of La in each component of simulated aquatic ecosystem were a decreasing order of: sediment ＞honewort＞snail＞fish, and the sequence of bio-concentration facter was as follows: honewort＞snail＞fish.

2金鱼藻对La有较强的富集能力，主要通过枝叶表面吸附、吸收而富集；螺蛳对La也有一定的富集，并主要分布于肠、壳中，螺头中积累相对较少；草鱼对La的富集能力相对较弱，进入鱼体的La主要集中在鳃、内脏、鳞及头、骨中，肌肉中积累量较少；按质量计，稀土元素La在模拟水生态系统各部分中的积累量依次为：底泥＞金鱼藻＞螺蛳＞草鱼；各水生生物对稀土La的生物富集因子依次为：金鱼藻＞螺蛳＞草鱼。

Three results are received:(1) The population of neurons can synchronize when the strength of gap junction is large enough and the process is chaotic and complex;(2) The nonlinear and complexity of the seriously disorder oscillation are larger than that of slightly disorder oscillation in a 2-D network;(3) The nonlinear and complexity of the oscillations with strong strength of gap junction are larger than that of that with weak strength of gap junction.

结果表明：电突触达到一定强度时神经元群才能同步振荡，这种活动是混沌和复杂的；同一网络中异常节律较严重的神经元活动的非线性和复杂性要强于异常节律较轻微的神经元；突触耦合强度较强时的神经元活动的非线性和复杂性要强于其在突触耦合强度较弱时的。

Although,the current fund-raising system in our country can effe ctively mobi-lize savings,problems still exist in capital transformation.As a p ublic resource,government financing continues to play an important role,whereas the function of financial market to fuel economy tends to be weakened.Resources are allocated revers...

我国现行融资制度基本能够有效地进行储蓄动员，但在向资本转化方面存在着一定的障碍；作为公共资源的政府融资仍然发挥着相当重要的作用，但金融市场对经济的促进作用有进一步弱化的趋势；在地区间和企业间存在着资源的逆配置现象，总体上资本的运用效率较低，而非正规金融发挥了不可或缺的作用；严格的利率管制使中介的价格发现功能几乎没有，而市场的价格发现功能一直较弱；此外，存在较高的交易成本，流动性水平整体较低，风险转移功能也相对缺乏。

In succession, the middle layer of anther wall had the strongest Ca^2＋ fluorescence intensity, and the tapetum took second place during the meiosis of microspore mother cell.

小孢子内Ca^2＋分布不均匀，细胞质中的Ca^2＋荧光较弱，细胞壁处Ca^2＋荧光较强，二细胞花粉时期，细胞呈现较强的Ca^2＋荧光。

The results show that the white thick-bedded siliceous rocks have high contents of SiO2 and Al2O3 and high ratios of Al/ and Al2O3/(Al2O3+ Fe2O3). The ∑REE are low, and the North American shale-normalized REE patterns are characterized by enrichment of LREE and absence of Eu and Ce anomalies, which suggest that the white thick-bedded siliceous rocks might have been formed in the continental margin environment and affected significantly by terrigenous constituents. The anatase-rich siliceous rocks have high contents of TiO2, Fe2O3, Cu and V but low Al/(Al + Fe+ Mn) and Al2O3/(Al2O3 + Fe2O3) ratios. The ΣREE are high, the North American shale-normalized REE patterns are obviously characterized by left-oblique to flat styles of curves and slight negative Ce anomalies, implying that they might have been formed in an oceanic ridge environment.

研究结果表明，呈厚层状产出的无矿白色硅质岩具较高的SiO2、Al2O3含量及Al/、Al2O3/(Al2O3+Fe2O3)比值，稀土元素总量很低，其北美页岩标准化配分模式为向右倾的曲线，无明显铈异常和铕异常，表明其形成于受陆源影响的大陆边缘构造环境；赋矿岩系中薄层状富钛硅质岩的TiO2、Fe2O3、Cu、V含量较高，但Al/、Al2O3/(Al2O3+Fe2O3)比值较低，稀土元素总量较高，北美页岩标准化曲线为明显左倾型－平坦型，具弱的负铈异常，表明其形成于洋脊及附近环境。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。