基于RCPC码和分块传输的新型HARQ系统

在研究Ⅱ,Ⅲ型HARQ的基础上,提出了基于RCPC码的新型HARQ,并通过仿真得出不同信噪比下的最佳分块方案,以便使新型HARQ获得最佳性能。新型HARQ是将F个相同的分块穿孔后同时发送;在接收端,解穿孔后相同的分块进行分集合并。新型HARQ具有Ⅱ,Ⅲ型HARQ的优点,当信噪比较低时新型HARQ的通过率和平均重传次数接近于Ⅲ型HARQ;当信噪比较高时新型HARQ的通过率和平均重传次数接近于Ⅱ型HARQ。对Ⅱ,Ⅲ型和新型HARQ的性能进行理论分析和仿真,结果证明本文结论正确。     

E-business technologies for xRM: Exploring the readiness of public broadcasters

This paper examines the possibilities of enhancing relationship management between public service broadcasters and their stakeholders by harnessing the potential of newest e-business technologies and concepts, such as: social media, digital and interactive TV, and mobile computing. In order to facilitate adoption of relationship management strategy, a framework for leveraging relationship management is proposed. Evaluation was performed within the e-business system of a public broadcaster. This empirical study explored the readiness and expected benefits of relationship management implementation. The research results have indicated that a public broadcaster could achieve a higher level of social responsibility, improve business sustainability, and empower communication and collaboration with all the stakeholders by using emerging technologies for relationship management activities.     

终端对业务和运营商的影响

详细分析了终端对话音业务和新业务的影响。在分析终端对话音业务的影响时从用户和终端两方面进行了阐述，指明为了进一步提高用户敷和砖络的使用率，运营商在进行话音营销对应逐渐将工作重点适当转向农村市场。也从对个人和行业用户的影响两方面阐明了终端对新业务的影响。     

多波束修正母线新型偏轴旋转反射面天线

以抛物线为母线的偏轴旋转抛面天线可以在锥面上或平面上实现宽角域扫描，或形成多束波天线，但沿性面和垂直之间的中间平面，子波束孔径上光程差很大，导致天线性能降低，本文以新型母线取代抛物线，创立新型偏轴旋转反射面天线，使天线性能得到显著改善。     

规整填料和新型塔板设计参数选取的质疑及分析

笔者指出了目前规整填料和新型塔板设计计算中若干尚未完全解决的、有争议或值得进一步完善的设计参数。如:规整填料的每米理论板数、最小液体喷淋密度、最小气体空塔动能因子、新型塔板开孔率等,并提出了具体的设计方案供与同行切磋。     

天然气C_3―C_8烃类浓缩分析新方法

目前在天然气研究中,对湿气和凝析油气来说,主要是以其中油的C4―C7烃类指纹和天然气的碳同位素来揭示天然气的成因,但在很多情况下,天然气和油是不同源的,并且在高―过成熟天然气中可用的有效信息量少。针对这一现状,自制了天然气C3―C8烃浓缩器,在现场井口直接采集天然气浓缩样品,并建立了天然气C3―C8烃浓缩实验新方法。该方法能有效地分析出天然气中的C3―C8烃类,为解决天然气组分少而气源对比困难等问题提供了新思路和新方法。     

新工科理念下“扩频通信技术与应用” 课程教学实践

本文以“扩频通信技术与应用”课程为例，探讨新工科理念下工程学科实践教学改革，具体措施包括：开展虚拟仿真实验，充分发挥双师型教师的主观能动性，开展MATLAB仿真训练、工程技术实训及相关的创新创业训练，结合企业实习以及开展国际交流合作等。     

基于三种反射型单元共享孔径的新型宽带低RCS反射屏设计

该文设计了一种基于3种反射型单元共享孔径的新型宽带低RCS超表面反射屏,与传统人工磁导体反射屏相比,引入一种相量干涉单元,利用新型相位对消关系完成了对传统人工磁导体(AMC)反射屏相位对消频带的拓展。通过将3种反射单元交错排布,合理设计阵列使其满足新型相位对消条件,并进一步优化单元结构参数,实现了阵列RCS缩减和缩减带宽的拓展。在不同极化波垂直入射条件下,新型阵列均有较好的低散射性能。仿真与实测结果表明：在5.2～13.9 GHz范围内后向RCS缩减量达到10 dB以上,相对带宽达到91%,为宽带低RCS反射屏设计提供了新的方法。     

Occurrence and significance of anomalous chloride waters at the Orakei Korako geothermal field, Taupo Volcanic Zone, New Zealand

Water with Cl concentrations from 15 to almost 10,000 mg/kg, and molecular SO₄/Cl ratios ranging from 0.003 to 1.87, drips periodically from the roof of Ruatapu cave and a side chamber, Rahu Rahu, located in the Orakei Korako geothermal field, Taupo Volcanic Zone, New Zealand. Pools in the bottom of both Ruatapu and Rahu Rahu contain sulfate–chloride waters with pH values ranging from 2.5 to 3.0; their Cl contents have varied temporally from 120 to 240 mg/kg and their molecular SO₄/Cl ratios from 0.86 to 1.30. The Cl in the water dripping from the cave roof cannot come directly from the alkali chloride–bicarbonate water that circulates in the reservoir at Orakei Korako since the modern and historic piezometric surfaces are several meters below the cave roof. Nor does all the Cl in the cave pool waters derive from the reservoir fluid as the volume input required is incompatible with their Na and K contents. A more likely source for the Cl is one whereby rain water, percolating through the fractured rhyolitic country rock, dissolves Cl present either in glass shards or halite deposited in prehistoric times when trapped alkali chloride water boiled to dryness. Given that Cl in the cave pool waters is therefore supplied from a source above rather than, as previously assumed, below, the axiom that Cl present in acid sulfate–chloride ± bicarbonate waters is necessarily a signature of a deep water or magmatic input needs qualification.     

Simple modelling of the effects of exploitation on hot springs, Geyser Valley, Wairakei, New Zealand

Many hot springs in Geyser Valley declined and ceased flowing during well testing (1950–1958) or the early stages of development (1958–1964) of the Wairakei field, North Island, New Zealand. A simple model that considers mixing, geothermal reservoir pressure, and Darcy flow is applied to analyse the changes in flow rate and chemistry of spring SP18. The model suggests that prior to the testing the observed flow rate of 3 l/s was comprised of about 2.1 l/s of water from the deep reservoir and about 0.9 l/s from shallow groundwater. As the pressure in the reservoir decreased as a result of exploitation, the reservoir component declined but the groundwater component remained near constant until the spring had nearly ceased flowing. The model reasonably predicts the flow cessation date for four other springs (Group A) but poorly predicts that for seven other springs (Group B). These two groups of springs do not appear to be clustered at the ground surface. The pressure–elevation relationship suggests that the Group A springs feed from within the shallower Waiora Formation and Group B springs from within the deeper Wairakei Ignimbrite Formation. The observation that declines of chloride concentrations in Group A springs occurred at least three years before those in springs of Group B is consistent with the finding that Group A springs have a shallower feeder depth.