查询词典 bit error rate

Variable bit-rate allows a codec to change its bit-rate dynamically to adapt to the "difficulty" of the audio being encoded. In the example of Speex, sounds like vowels and high-energy transients require a higher bit-rate to achieve good quality, while fricatives e.g.

变比牲率允许编解码器动态调整比特率以适应的音频解码的&难度&，拿Speex来说，像元音和瞬间高音则需较高比特率来达到最佳效果，而摩擦音则用较少的比特即可完成编码。

In this paper, firstly, the new combined error model of cumulative geoid height influenced by three error sources including the inter-satellite range-rate of K-band ranging system, orbital position of GPS receiver and non-conservative force of accelerometer from GRACE satellites is established using the semi-analytical method. Secondly, the dependability of error models is demonstrated based on matching relationship among the accuracy indexes of key payloads. Finally, the accuracy of global gravitational field up to degree and order 120 is effectively and rapidly estimated from GRACE Level 1B measured observation errors of the year 2006 publicized by the Jet Propulsion Laboratory in the USA, and the cumulative geoid height error is 18.368 cm at degree 120, which preferably accords with the Earth's gravitational field model EIGEN-GRACE02S provided by the GeoForschungsZentrum Potsdam in Germany.

首先基于半解析法建立了新的GRACE卫星K波段测量系统星间测速、GPS接收机轨道位置和加速度计非保守力误差联合影响累计大地水准面的误差模型；其次，基于各关键载荷精度指标的匹配关系，论证了误差模型的可靠性；最后，基于美国喷气动力实验室公布的2006年的GRACE Level 1B实测误差数据，有效和快速地估计了120阶全球重力场的精度，在120阶处累计大地水准面的精度为18.368 cm，其结果和德国地学研究中心公布的EIGEN-GRACE02S全球重力场模型符合较好。

For a long-term stable Exchange Rate of RMB, the Commercial Banks are not only lack of a full understanding of Exchange Rate risk but are also lack of the essential experiences and skills to manage the Exchange Rate risk. Exchange Rate System reform makes domestic Commercial Banks face a great challenge of Exchange Rate risk. Adapting RMB Exchange Rate reform and managing Exchange Rate risk are the subjects that the domestic commercial banks must face.

长期稳定的人民币汇率使商业银行对汇率风险既缺少足够的了解和重视，也缺乏必要的外汇风险管理的经验和技能，汇率制度改革使我国商业银行开始真正面临汇率风险的考验，尽快适应人民币汇率制度改革，应对汇率风险是我国商业银行面临的重要课题。

There were no significant correlations between food concentration and the rate of population increase of Clone B as well as the mixis rate and fertilization rate of Clone A, B and C. However, the relationships between food concentration and the rate of population increase of Clone A and C were significantly curvilinear, with the regression equation Y=0.019X2-0.209X+0.638 and Y=0.042X2-0.402X+0.852, respectively. The relationships between the food concentration and the instant rate of population increase, the mixis rate and the fertilization rate of clone D were all significantly curvilinear, with the following regression equations Y=-0.052X2+0.609X-0.667,Y=0.994X2-15.763X+73.424 and Y=-0.251X2+15.940X-15.446, respectively.

克隆B的种群瞬时增长率、种群中的混交雌体百分率和混交雌体受精率均与食物密度间无显著的相关性；克隆A和C的种群瞬时增长率与食物密度间呈曲线相关，而其种群中的混交雌体百分率和混交雌体受精率均与食物密度间无显著的相关性；克隆D的种群瞬时增长率、种群中的混交雌体百分率和混交雌体受精率均与食物密度间呈曲线相关。

The circular also clarified the collateral and the discount rate: security for the Shanghai 180 stock index, the conversion rate of no more than 70%; other A shares and B shares, Conversion rate of no more than 65%; ST shares and warrants of the conversion rate of 0%; ETF's discount rate does not exceed 90%; the national debt conversion rate of not more than 95%; other bonds (non-government bonds) and other listed securities investment funds conversion rate of less than 80%.

通知还明确了担保和贴现率为上海180股票指数：安全，不超过70％的转换率，其他A股和B股，转换率不超过65％，ST股票和0％的转换率认股权证； ETF的折扣率不超过90％，而国家债务不超过95％的转换率，其他债券和其他上市证券投资基金转换低于80％。

The results indicate that, in either single or double blowing, larger erosion rate is mainly found in the slag line and near purging plug area of ladle lining; erosion is accelerated when gas flow rate increases; the erosion rate of ladle lining with double blowing is larger than that of single blowing; erosion rate distribution is obviously different as gas flow rate increases; in heavy blowing, serious erosion centers around slag line area and expands gradually outwards; as purging plug gets close to lining wall, malconformation of erosion rate in ladle lining becomes more prominent and the erosion rate of lining near purging plug increases.

结果表明，无论单吹还是复吹，较大的蚀损速率主要分布在钢包渣线及近透气砖区域，吹气量的增大会加速钢包内衬的蚀损。采用复吹时，钢包内衬的蚀损较单吹时更快。随着吹气参数的改变，钢包内衬蚀损速率的分布状况差异明显。大吹气量下，较大的蚀损集中在渣线区域且呈环向扩展；透气砖安装距包壁越近，钢包内衬蚀损不均衡性也越突出，近透气砖内衬蚀损加重。

This thesis, titled "under the Exchange rate marketization of RMB a probe into exchange rate risk management from the enterprises' standpoint ", on the basis of some basic concepts and theory about exchange rate risk , mainly discusses the significance and exigency of study exchange rate risk management in corporation of china , and raises some proposals in such aspects as removing obstacles, optimizing exchange rate risk management system and establishing the mechanism of previous tergiversation exchange rate risk. In addition, the thesis analyzes the risks that will be encountered in the development of exchange rate marketization of RMB and offers solutions to these risks.

本文选择《人民币汇率市场化下的企业汇率风险管理研究》为题，在介绍汇率风险的基本知识和相关概念、企业对汇率风险管理基本理念的基础上，结合我国实际，分析了我国涉外企业在目前人民币汇率机制改革、人民币汇率逐步市场化的前提背景下汇率风险管理的必要性和紧迫性，提出逐步完善企业汇率风险管理系统，建立企业内部风险预警机制运行模式的建议、并对人民币汇率市场化下企业所面临的汇率风险进行了分析，提出了相应的对策。

Results The resection rate for low and undifferentiated adenocarcinoma and mucinous carcinoma on gastroscopic biopsy was low (64.1%), and the rate for diffuse infiltrative gastric carcinoma (6.7%) was significantly lower than that of mass tumor type (66.7%) and ulcerative type (61.8%). The total accuracy rate of CT staging was 91.21%. Sensitivity rate of CT diagnosis of perigastric invasion and/ or metastasis was 72.22%. For lymph node staging the accuracy rate of CT was 74.2%, sensitivity rate was 74.1% and specificity rate was 74.3%. CT diagnosis of lymph node groups was blur.

结果 胃镜活检低分化腺癌和黏液腺癌手术切除率(64.1%)较低，弥漫浸润型胃癌的切除率(6.7%)明显低于肿块型(66.7%)和溃疡型(61.8%)；CT分期总准确率为91.21%，CT诊断对胃周脏器受侵和转移的敏感性为72.22%，CT对淋巴结分期的准确率为74.2%，敏感性为74.1%，特异性为74.3%，CT诊断对淋巴结分组比较模糊。

Based on those analyses and conformed international and national economic condition in china and some intrinsic defects of target zone regime, author transform target zone exchange rate regime by dividing two layers and bring forward a new exchange rate regime: double-layer-monitor exchange rate regime, the new model have possessed two merits, one is that the new model make "hollymoon effect" of target zone recurrence,and the merit can alleviate the fluctuation of exchange market;another merit is that the new model is a self-regulation system, that is say, the model can avoid long-term misalignment of exchange rate, those merit have major significance for china economy sustainable development and Chinese financial system more perfection, in paper we also present some fiscal policy and money policy served as a foil to double-layer-monitor exchange rate regime in order to make it work well, at last, we conclude that the new model will be the prior selection of RMB exchange rate regime reform for a long time form now on, and it also can serve as the bridge of RMB exchange rate regime steering to one of bipolar—free float.

在这些分析的基础上，并考虑到当前中国所面临的国际国内经济环境，针对汇率目标区的一些固有缺陷，笔者又对汇率目标区模型进行了分层改造，提出了一个新的汇率机制模型：汇率目标区双层监控模型，该模型有两个主要优势，一是可以使&蜜月效应&得以重现，从而避免外汇市场的过度波动；二是该模型是一个自稳定系统，能够进行自我调整，使实际汇率同长期均衡汇率保持一致，从而避免实际汇率的长期错位。这些优点对于我国经济的可持续发展，对于我国金融的更加完善，有着十分重要的意义。为使汇率目标区双层监控模型良好运行，论文还就相应配套的财政政策、货币政策措施作了探讨。最后得出结论，按照汇率制度&并存继起&假说，今后很长一段时间内，汇率目标区双层监控模型都将是人民币汇率制度的合意选择，另外，它也可作为人民币汇率制度向独立浮动制过渡的桥梁。

In the intersatellite coherent optical communication, the vibration of a satellite will lead to a pointing error of transmitting and receiving antennas, which will decrease the signal-to-noise ratio and increase the bit error rate. In this paper, the Rayleigh distribution is taken as the pointing error model caused by satellite vibration, and PSK homodyne communication scheme is used as an example to analyze the influence of the satellite vibration on the system instantaneous BER and average BER. The simulation calculation result of BER is given.

针对星间相干激光通信中卫星平台的振动造成发射天线和接收天线的瞄准角误差，使系统信号信噪比下降，误码率增加，该文以瑞利分布作为振动造成的瞄准角误差模型，结合高斯本振光和艾里信号光外差检测模型，以PSK零差通信体制为例分析卫星振动对系统的瞬时误码率和平均误码率的影响，给出误码率仿真计算结果。

There are different types of personal loans available.

有许多不同类型的个人贷款优惠。

The above mentioned teaching model of spiral rising can be used to avoid rigidness in teaching.

上述螺旋式上升的教学模式，可以避免教学形成模式後的僵化现象。