低降

To give a lower condition or station to; abase.

降到一个低的地位或降低身份。

This transformation is particularly useful for the research on wave propagation in acoustic waveguide.

结果表明这种方法优于基于小波变换的降噪方法，特别是在低信噪比情况下。

The area is small to the highest ( conversion efficiency 13 - 15%, some have achieved more than 20%) of monocrystalline silicon solar energy cell conversion efficiency, and output power is big, and stability is good, grows ( generally can reach more than 20 years ) service life, but the raw and processed material cost height, the weak light specific property is wronger, and production technology is complicated, hence the selling price is also higher; The polycrystalline silicon solar energy cell is basic identical with the function characteristic of monocrystalline silicon solar energy cell; The conversion efficiency of non- brilliant silicon solar cell than hangs down ( simples about 6 - 8%), the area is than greatly, but because of his raw and processed material cost than hanging down, can be easy to big area industrialize production, what will have hope to be used the generally big area to generate electricity from now on most will be this kind of application that battery is along with manufacture technique and new material, in a single day the practical package photoelectricity conversion efficiency of its big area achieves more than the 10-15%, and the price of every tile electric power-generating equipment is fallen 1 - 2 U.S.dollar of time, and just is enough to that the solar energy cell efficiency that big area the getting extensive use will constantly replace in now convention certainly special use and the laboratory of sources of energy s will high get many.

单晶硅太阳能电池转换效率最高（转换效率13～15%，有的已达到20%以上），面积小，输出功率大，稳定性好，使用寿命长(一般可达20年以上)，但原材料成本较高，弱光特性较差，生产工艺复杂，故售价也较高；多晶硅太阳能电池与单晶硅太阳能电池的性能特点基本相同；非晶硅太阳能电池的转换效率较低（约6～8%左右），面积较大，但因其原材料成本较低，可便于大面积工业化生产，今后最有希望用于一般大面积发电的将是这种电池。随着制造技术和新材料的应用，一旦它的大面积实用组件光电转换效率达到10-15%以上，每瓦发电设备的价格降到1～2美元时，便足以大面积得到广泛应用并将不断取代现在常规能源。当然特殊用途和实验室中的太阳能电池效率要高得多。

Catalytic techniques for deep desulfurization, denitrogenation and dearomatization in production of clean gasoline and diesel fuels were reviewed, especially those for producing low-sulfur and extra-low-sulfur gasoline and diesel oil, among which technologies arousing most attention are sulfur-reducing FCC catalyst and additives, selective hydrogenation catalysts and technology, adsorptive desul-f urization of gasoline and diesel oil, biologically catalytic desulf urization of diesel oil, and selective oxid...

为面对新世纪清洁燃料生产的新机遇和新挑战，各种生产清洁燃料的催化技术正在竞相开发之中，尤其是生产低硫、超低硫汽油与柴油技术。其中，催化裂化降硫催化剂和助剂、选择性加氢处理新催化剂及工艺、汽柴油吸附脱硫、柴油生物催化脱硫和选择性氧化脱硫等新技术尤其引人注目。我国应加快清洁燃料生产催化新技术的开发研究，为生产更清洁的汽油和柴油燃料提供技术储备。

Methods: A total of 21 young swines were randomly divided into untreated group, low-dose salvianolate group and high-dose salvianolate group (7 in each group). AMI was induced by ligaturing left anterior descending coronary artery. After the operation, 400 or 200 mg salvianolate dissolved in 250 mL 5% glucose saline was administered by intravenous drip to swines in the HS group and the LS group respectively for 7 days. The swines in the untreated group were administered with 250 mL 5% glucose saline.

苏中幼猪21只，随机分为模型组和低、高剂量丹参多酚酸盐组。3组均经开胸结扎冠状动脉左前降支制作心肌梗死模型，造模成功后当日，高剂量丹参多酚酸盐组给予400mg丹参多酚酸盐加250mL 5%写葡萄糖生理盐水静脉滴注；低剂量丹参多酚酸盐组给予200mg丹参多酚酸盐加250mL 5%葡萄糖生理盐水静脉滴注；模型组给予等体积的5%葡萄糖生理盐水静脉滴注。1次／d，连续给药7d。

Moduoke of medium Great Master tells us: The kind that raises newspaper circulation is savour its fall a bit lowlier, again a bit lower.

传媒大师默多克告诉我们：增加报纸发行量的方式是将其品味降得低一点，再低一点。

Low interest rates have steepened the yield curve, the difference between short- and long-term rates, but they also make this a terrible environment for deposit margins, which banks calculate as the difference between what they pay for deposits and what they make by putting them to work in money markets.

银行的低利率，也已经使收益线陡降，加剧长短期利率的差距，不过，低利率在恶劣的经济环境中也有助于减轻存款的边际成本，银行可以评估偿付利息和周转资金的利弊得失。

In the second chip, a low-power front-end circuit, intended for use in the receiver path of the wireless local area network systems, is analyzed and designed. This front-end circuit is composed of a low noise amplifier, a phase splitter, and a direct down-conversion mixer.

在第二颗晶片中，适用於无线区域网路接收端之低功率前端电路被设计与分析，此电路包含了一个低杂讯放大器，一个相位分离器以及一个直接降频混频器。

With low pass filter use Bessel for least amount of overshoot in the time domain, and Cauer for fastest roll off in the freq domain.

在时域，最小超调量的低通滤波器用Bessel滤波器，在频率域是滚降最快速的低通滤波器用Cauer 或elliptic滤波器。

The persistence of low rig counts in Canada leads to lower expected Canadian natural gas production and lower U.S. pipeline imports next year.

低船具计数坚持在加拿大带领降下期望加拿大天然气生产和更低的美国管道明年进口。

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。