传输效率

Digital fountain is a packet oriented forward error correction technology for channels with erasures, which has obvious efficiency advantage in broadcast.

摘要数字喷泉是近年发展起来的一类基于删除信道、面向数据分组的前向纠错编码技术，在广播类传输中具有明显的效率优势。

From the three-level rate equation,the analytical expressions of the output power and the combining efficiency of the spectral combining system were derived based on the simplified model and propagation equation of the light in fiber lasers.

在简化模型的基础上，从三能级粒子速率方程出发，结合光纤激光器的光束传输方程，推导出光纤激光器谱合成系统的输出功率和合成效率的解析表达式。

It well adapts to loose-coupled characteristic of large-scale network and meets the need of distributed network management.

在此基础上提出了一种publish/Subscribe通信模型的信息流优化传输策略，提高了网络管理系统的运行效率。

We find that the carriers mobilities have high effects on them. When the majority carrier has the lower mobility, the carriers are easy to injection, transport, and the device efficiency has been improved.

场强分布及J-V关系受载流子迁移率影响较大，在器件中占主导地位的载流子应具有较低的迁移率，这样有利于载流子的注入和传输，发光效率可相应得到提高。

We have also investigate the effect of adding [6,6] phenyl C61butyric acid methyl ether as an electron transport material in various contents with CdTe QDs on the improvement of solar conversion efficiency of the PV devices.

我们亦探讨掺杂[6，6]苯基C61丁酸甲酯改善载子传输，搭配不同的混合浓度与粒径大小量子点对太阳能电池转换效率的影响。

Wan Zhongmin ,Liu Wei, Zhang Liang, Ming Tingzhen （College of Energy and Power Engineering, H uazhong University of Science and Technology, Wuhan 430074）The operational behavior of small-scale flat-plate type capillary pumped loop at high heat fluxes was analyzed. The total pressure loss along the loop and maximum capillary pressure of the evaporator wick for different working fluids were obtained.

引言毛细抽吸两相流体回路是一种利用液体工质的相变进行传热传质的两相热控系统，具有结构简单，安置灵活，传热效率高，不需外加动力装置，运行可靠，传热温差小，热传输距离长以及传热能力强等优点，使其成为航空航天热控技术的有效方式[1 ]。

Through the analysis, we also find that the change of defect waveguide edge dielectric rod radius and wave guide\'s width are advantageous for enhancing the coupling efficiency of waveguide with the resonant cavity.3. The coupling relation of between the resonant cavity and waveguide has been analyzed, and according to the coupled mode theory, transmission coefficient expression of every port has been derived.

通过分析也发现适当改变缺陷波导边缘介质柱的半径、缺陷介质柱与波导间介质柱的半径及波导的宽度，都有利于提高波导与谐振腔之间的耦合效率。3、从理论上分析了谐振腔与波导间的耦合关系，根据耦合模理论导出了各端口传输系数的表达式。

AMC selection module periodically measures the wireless channel, updates the state transition matrix of finite-state Markov chain to trace the channel status, and dynamically selects transmission mode, which includes modulation and forward error coding, so as to guarantee packet error rate performance and improve spectrum efficiency.

AMC选择模块周期性地测量无线信道，更新马尔可夫模型转移概率矩阵以跟踪当前的信道特征，动态选择物理层传输模式（包括调制方式和前项纠错编码方式），在保证系统误包率要求的同时，最大可能地提高系统频谱效率。

We analyze the BER performance of PMBT with zero forcing, minimum mean square error receiver and optimum bit allocation and also compare the performance with Generalized MRT.

我们将使用零强制、最小均方误差接收器和最佳位元分配的PMBT系统来做位元误差率的分析并且和广义的最大传输率系统的效率做比较。

This invention discloses an IC phone communication method based on the FSK mode including: loading and transmitting ciphered sequences, ciphered card information, called number information and other interaction information between an IC terminal and a process platform in the mode of FSK information, in which, the platform authenticates the authority and charges, if the deduction at the IC terminal is correct, then it sends signals of anti-stealing making phone calls periodically to the platform, which differentiates the correctness of the signals, if they are wrong, it releases the call, when the communication is finished and the calling rings off first, the platform receives the identification signals of the ring-off of the calling to cut off the call of the called side and release the voice channel between the platform and the called side, then processes balance information and releases the call finally.

本发明公开了一种基于频移键控方式的IC卡电话通信方法，其主要方案是IC卡终端与处理平台之间通过FSK信息方式承载和传输加密序列、加密卡信息、被叫号码信息及其它交互的信息，由处理平台进行鉴权和计费；如果IC卡终端扣费正确则周期性向处理平台发送防盗打信号，处理平台鉴别防盗打信号的正确性，如果错误则释放呼叫；当通信结束后主叫先挂机时，处理平台收到主叫挂机标识信号后首先切断被叫侧的呼叫，释放处理平台与被叫侧之间的话路，然后再进行余额信息的处理和最后释放呼叫。使用本发明提出的方法，使得IC卡终端与处理平台之间的信息交互流程更加简单、清晰，提高了信息交互效率，并能及时释放话路，节约中继资源。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。