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Adjusting pH to 12, air-liquid ratio to the range of 3 000~4 000 and temperature to the range of 35~45℃, after the washing wastewater from deposited ammonium carbonate that the initial concentration of ammonia nitrogen was 1 570 mg/L was treated by ammonia stripping, the residual concentration of ammonia nitrogen was controlled to below 100 mg/L and removal efficiency reached to over 94%.

发现pH、温度和气液比是氨氮去除效率高低的关键因素,废水初始浓度对去除率无影响。调节废水pH=12,气液比在3 000~4 000,温度在35~45℃范围,浓度为1 570 mg/L的碳铵沉淀洗涤废水经氨吹脱处理可使出水残余氨氮浓度控制在100 mg/L以下,去除率达94%以上。

Another approach in enhancing the light extraction efficiency of AlGaInP LED was accomplished using a surface roughening process. In this process, the Au(170 nm)/AuBe(260 nm)/Au(170 nm) ohmic contact layers were first deposited on the GaP window layer. After the alloy annealing process (480°C for 10 min), the Be atoms will diffuse into the GaP top layer and form non-uniform clusters. The LED samples were then immersed into a mixture 3H3PO4:1H2O2:1H2O solution for 6 min, resulting in a rough GaP surface. The luminous intensity of the AlGaInP LED can increase from 42 to 50 mcd, that is, an 18% enhancement can be achieved via the present non-photolithography surface roughening process.Keywords: LED, AlGaInP, Cu substrate, Reflector, Surface roughening

在实验的第二部份是开发磷化镓窗口层之粗化制程,我们是藉由正面金/铍欧姆接触电极之熔合制程,使铍扩散至磷化镓层,同时利用铍渗入磷化镓造成之特殊组成,可形成不均匀之蚀刻阻挡,而在磷化镓表面形成粗化,我们发现480℃、10分钟的熔合制程,加上浸泡磷化镓蚀刻溶液6分钟,可将四元发光二极体之发光亮度由42 mcd 提升到50 mcd,经由此无光罩粗化制程可将亮度提升18%,明显提升磷化铝铟镓发光二极体之外部量子效率。

And others discussed the best linear unbiased estimator for the logistic population.

等又先后讨论了Logistlic分布参数的最佳线性无偏估计及估计的相对效率等问题。

Broken-rollers and stepless blad type double facer adopts combined structure which effectively overcometraditional low heat efficeency because of concave heat box when work,which improve work speed and qualit,decrease wasted board,especially suitable for light weight board.

其中碎辊式无级压载双面机采用碎辊结构,有效克服传统压载,因加热箱工作时下凹,导致热板上表面传热效率差的缺点,避免了传统压辊不平衡对纸板的冲击,从而提高了生产速度和质量,降低了废品率,更加适合克重纸板生产。

The main operations is point operation in elliptic curve. Compared with previous certificateless encryption schemes related to bilinear pairing operation the scheme is more efficient on computation.

该方案主要涉及椭圆曲线上的点运算,与原有无证书加密方案中采用双线性对计算相比具有更高的执行效率。

This research sets up a four-stroke unthrottled engine model equipped with electromagnetic valves, In this research, we analyses the influence on the engine volumetric efficiency, house power, torque and fuel comsumption by changing the opening and closing timing of the intake valves when the engine rotates in low, medium and high speed.

本研究建立配有电磁式气阀的四行程多缸无节流阀引擎动态模型,分析引擎在低、中、高转速下,改变进气阀开闭正时对引擎容积效率、马力、扭力以及燃油消耗率的影响。

Further, a direct interpolation method is used to impose the essential boundary condition without use of the penalty function and the Lagrange multipliers method.

通过悬臂梁和无限开孔板两个算例验证了本文方法较传统的无网格局部Petrov-Galerkin方法在计算效率上有了较大的提高。

After transcription of ribozymes and substrate by 32 P, cleavage reaction in vitro was detected.

结果 pM1 GS 716和 pM 1 GS 337在 37℃均有切割活性,pM 1 GS 716的切割效率为 93%,pM1 GS 337为 4 2 %,而 pM1 GS 2 35几无切割效应。

High efficiency of low voltage and without RF interference guarantees the reading distance and accuracy of a widely variety of sensors.

采用专门设计的线性稳压电源,多种电压输出,低压差工作效率较高且无射频干扰,能有效地保证各种感应头读卡距离与准确性。

The gene transfer with infiltrator catheter is effetive and safe. The application conditions of infiltrator have met the requirements for clinical gene delivery.

Infiltrator导管转导效率高,对血管壁无明显损伤,其应用条件基本满足了临床的要求。

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In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国,慢性酒精中毒,肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题,你可以随时联系我。

Very pretty, but the airport looks more fascinating The other party wisecracked.

很漂亮,不过停机坪更迷人。那人俏皮地答道。