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In 2000,the area below 400 meters was also watershed,mining sites and settlements,the proportion of both unutilized land below 400 meters and woodland between 400 meters and 800 meters raised a little,it showed that most woodland transform into the other types of land use in low altitude area,however,most unutilized land and the other types of land use transform into woodland in low and mediad altitude area,and the changes in woodland had metastatic trends in low and middle altitude area in the years from 1988 to 2000.The area proportion between 400 meters and 800 meters raised a lot in mining sites and settlements,the total distributed area on woodland had a trend of rising,while the distribution in pasture had a trend of decreasing.

在2000年，400m区域以下依然是水域和居民点及工矿用地，未利用地比例在400m以下有所上升而林地比例在400m～800m有所上升，表明在1994年至2000年间，低海拔地区许多林地转化为其他土地利用类型，而在中低海拔地区大量的未利用地和其他土地利用类型转化为林地，林地的变化有向中低海拔转移的趋势。2006年居民点及工矿用地在400m至800m区域面积比例增加，林地类型分布区域整体呈上升的趋势，草地分布区域呈下降的趋势。

By utilizing this concept, highly ordered mesoporous silica SBA-15 materials with low microporosity have been synthesized under low temperature and low surfactant concentrations; the quality of resulted mesostructure or pore size distribution can be greatly improved in the cases of EO〓BO〓EO〓, EO〓BO〓EO〓, EO〓BO〓EO〓, EO〓BO〓EO〓, EO〓PO〓EO〓 and EO〓PO〓EO〓 block copolymers.

利用盐效应，在低温或低模板剂浓度条件下合成出高度有序、微孔孔容小的介孔分子筛SBA-15；大大提高了利用嵌段共聚物EO〓BO〓EO〓，EO〓BO〓EO〓，EO〓BO〓EO〓，EO〓BO〓EO〓，EO〓PO〓EO〓和EO〓PO〓EO〓等导向合成介孔材料的有序度或孔径分布。

Especially , with the wide use of the low noise microwave receiver model of "low noise amplifier - mixer - intermediate frequency amplifier", the rejection to image frequency interference has become the last problem how to make the whole receivers noise low and resist interference.

尤其是随着"低噪声放大器——混频器——中频放大器"这种低噪声微波接收机模型的广泛使用，对镜频干扰的抑制已逐渐成为整机低噪声、抗干扰的最后难题。

There are complex variations in realistic low-voltage power line network topology framework.In order to study the low-voltage power line transmission channel model,a model to describe the power line network channel topology framework is established in terms of basic characteristics of low-voltage power line network in this paper.

低压电力线网络拓扑结构变化复杂，为了研究低压电力线信道传输模型，根据低压电力线网络的基本特点建立了描述电力线网络拓扑结构的模型，利用模型把低压电力信道作为一个过程去描述，建立了节点信号传输函数来推导低压电力线网络的传递函数。

From monomial mensurated results, we can see that the sequences of the low temperature stress tolerance of several lines are different, but the low temperature stress tolerance of some lines is steady, such as 24, 14 and etc, So we can account for the trend of the low temperature stress tolerance of lines.

在上述各单项指标测定结果间比较可以看出，部分品系耐低温能力在排序中位次有一定差异，但其中有一些品系的耐低温能力总体上还是比较稳定的（如24、14等），可以说明耐低温能力的趋势。

There's also a 100Hz low cut/high pass switch for each mic input, so you can keep the ultra-low frequency muddiness out of your sound-and give your bass that extra punch if used in conjunction with the Low EQ.

Read more 还有一个100Hz的低切/高通开关为每个麦克风输入，这样你就可以保持超低频糊涂了你的声音，并给予你的贝司额外的冲压，如果结合使用的低情商。

It features numerous advantages: it is noncombustible, nontoxic, and resistant to corrosion; it has low weight by volume, low thermal conductivity, stable chemical property, low moisture rate and good hydrophobicity.

它具有不燃、无毒、耐腐蚀、容重小、导热系数低、化学稳定性强、吸湿率低、憎水性好等诸多优点，是目前公认性能优越的保温、隔热、吸音材料，具有十分广泛的用途。

In the temperature sensing, the theory of fiber Bragg grating temperature sensing has first been proposed, the characteristic of the FBG temperature sensing was analyzed, it was deduced that the sensitivity coefficients of first-order and second-order ,and experimental findings was protracted, the gained polynomial better inosculate with the theory value. The experiment was processed in the low temperature , the thermo-optic coefficient was emended in the polynomial of the normal temperature ,the result was accorded with the sensing character of the normal and low temperature ,and it was resolved that the theory account of the normal and low temperature did not accord with the experiment.

在温度传感方面，主要从光纤布拉格光栅的温度传感模式出发，对光纤布拉格光栅的温度传感特性进行了分析，推导出了光纤光栅的一阶与二阶温度灵敏度系数，并对实验数据进行了拟和，所得多项式和理论值吻合的很好，并对低温传感进行了实验，将在常温下得出的多项式进行了热光系数的修正，所得的结果同时符合常温与低温的传感特性，解决了低温与常温情况下的理论计算与实验的不一致性。

Occupier of land resources, a large number of low-rise low-density residential is not suited to China's national conditions, low-rise high-density and high density are the choice of high-level direction.

占用的土地资源，大量的低层低密度住宅是不适合中国的国情出发，低层高密度和高密度的选择，是高层次的方向发展。

In order to overcome the shortcomings of the old method of picture-taking, such as the low speed of picture-taking, low efficiency, off-grade pictures and low percent of pass, so the DC picture-taking system has been developed.

为了克服老式照相方式带来的花费时间长、效率低、相片质量差、合格率低等缺陷，而开发了数码证照系统。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。