The Buck converter with double-frequency ( BCDF) is used as the example to analyze the steady and dynamic performance. An improved method is proposed to enhance the dynamics of BCDF.

The biomass estimation parameters of Larix and Korean Pine have not obvious trend with stand age, while the BEF^ BCEF and R of Pinus sylvestris var. Mongolia decreases with the stand age increasing, and gradually stabilized.

落叶松和红松的生物量估算参数随林龄无明显变化趋势，樟子松BEF、BCEF和R随林龄的增大而减小，并逐渐趋于稳定。

Conclusion BCEF has antidepressant effects in depression mouse models. The mechanisms of its antidepressant effects may be related with the reinforcement of central monoamine neurotransmitter especially to 5-HT and NE nerves system.

结论BCEF在多种抑郁模型上具有一定的抗抑郁作用，可能与增强NE、5HT能神经系统有关。

Effects of Root Soaking with Biochemistry Fulvic Acid ( BcFA) on Growth and Physiology of Grape Seedlings

生化黄腐酸浸根对葡萄幼苗生长及生理的影响

Physiological Effects of Biochemical Fulvic Acid ( BcFA) on Apple Trees under Drought Stress

干旱胁迫下生化黄腐酸对苹果树的某些生理效应

Study on Extraction of BcFA and Its Physical and Chemical Characters

生化黄腐酸的提取及其理化性质的研究

OBJECTIVE: To discuss the effect of autogenous vein graft conduit anastomose and brain cell growth peptide ( BCGP) on clinical rehabilitation of facial nerve injury by comparing different methods in the rehabilitation of facial nerve injury.

目的：比较面神经损伤修复的不同方法，探讨自体静脉套接吻合口及脑细胞生长肽在临床上修复面神经损伤的效果。

But having satisfied the requirements of practical necessity, most people go no further.

大部分人在满足了实际需要后，就不再继续发展这种能力了。

I will go no further in this matter.

这件事我不愿再干下去了。

I'm done up; I can go no further.

我累坏了；我再也不能走了。

When Ji Zi climbed up to the top and could go no further, he suddenly saw the light. Hugging the mast, he shouted happily: "I've learned Taoism! I've learned Taoism!"

季子爬到顶端，无法再上的时候，忽然大悟，抱着桅杆欢叫：“我得道了！我得道了！”

The Plan for Highway Network Maintenance of BCHD

首发公司高速公路网养护规划方案

Passenger throughput keeps growing. In2009, BCIA's passenger throughput increased by17%. As a result, Beijing Capital Airport ranked the third busiest passenger airport in the world.

客货吞吐量继续增长2009年北京首都机场旅客吞吐量同比增长17%，一跃成为全球第三大客运机场。

In this paper, I developed the safety risk advisory system to monitor the hazards status real-time and actively in BCIA.

实现对机场安全风险的动态监控和实时预警。

Using an NBT/ BCIP color detection system, dark purple grains were seen around cells by light microscopy and indicated stable binding between DIG-WSSV and hemocytes.

以NBT/BCIP为酶反应显色底物观察到在细胞周围形成许多暗紫色颗粒，证实病毒与细胞间存在着稳定的结合。

Positive signals were identified by observing the blue and purple spots produced by the catalytic reaction of Alkaline phosphatase to NBT and BCIP.

通过观察碱性磷酸酶对NBT和BCIP的催化反应产生蓝紫色斑点来判定阳性信号。

To investigate the metabolism of branched chain ketoacids ( BCKA) in patients with chronic renal failure ( CRF) and healthy control after an oral dose of ketosteril.

目的探讨慢性肾衰患者和正常对照组空腹口服开同后支链酮酸的代射动力学的变化。

Objective To investigate the expression of B7.1 and B7.2 molecules in peripheral B cells of patients with chronic B cell lymphocytic leukemia ( BCLL) and to study the relationship between B7.1 and B7.2 expression and pathogenic mechanism of BCLL.

目的研究比较慢性B淋巴细胞白血病（BCLL）与正常人外周血中B细胞的B71、B72分子的表达水平，探讨其表达与慢性B淋巴细胞白血病发病机制的关系。

Study on Bcll RFLP in Factor VIII Gene and Prenatal Diagnosis of Haemophilia A through RFLP

凝血因子Ⅷ基因内BclⅠ多态性的研究及其在甲型血友病产前基因诊断中的应用

For Box-Jenkins systems with correlated noises, a bias compensation least squares ( BCLS) identification method is proposed by means of the bias compensation principle.

对于存在相关噪声干扰的Box&Jenkins系统，本文借助于偏差补偿原理，推导了一个偏差补偿最小二乘（BCLS）辨识方法；

The purpose of this paper is to exhibit relationships between BCLS and other identification algorithms.

本文旨在分析偏差校正法与其他参数辩识方法的关系。