基于AD9361的掌上型LTE RRU设计与开发

当前小体积远端射频单元（Remote Radio Unit,RRU）主要是皮站级别的Pico-RRU，其重量和体积仍然难以满足掌上型的要求。为此，采用高集成度的AD9361芯片来实现长期演进（Long Term Evolution，LTE）宽带收发信机功能，配合时钟同步模块、放大器模块和控制接口电路等一起构建低成本的掌上型RRU。主要解决了基于AD9516的时钟同步、低相位噪声设计和高灵敏度接收机设计三个技术难点，成功实现了掌上型、高性能、低成本的设计目标。整个RRU样机尺寸为18 cm×10 cm×2 cm，质量约500 g，量产成本千元以内。测试表明，该RRU下行误差向量幅度（Error Vector Magnitude，EVM）小于3%，优于3GPP要求的8%；10 MHz带宽时上行接收机灵敏度优于3GPP要求的-93.5 dBm。     

Pricing Defaultable Bonds Using a Lévy Jump‐Diffusion Model

This paper uses a reduced‐form approach to derive a closed‐form pricing formula for defaultable bonds. The authors specify the default hazard rate as an affine function of multiple variables which follow the Lévy jump‐diffusion processes. Because such specification allows greater flexibility in the generation of a valid probability of default, their pricing model should be more accurate than the valuation models in traditional studies, which ignore the jump effects. This paper also proposes a new method for estimating the parameters in a Lévy Jump‐diffusion process. The real data from the Taiwanese bond market are used to illustrate how their model can be applied in practical situations. The authors compare the pricing results for the influential variables with no jump effects, with jump magnitudes following the normal distribution, and with jump magnitudes following the gamma distribution. The results reveal that the predictive ability is the best for the model with the jump components. The valuation model shown in this paper should help portfolio managers more accurately price defaultable bonds and more effectively hedge their portfolio holdings.     

WPS在处理质检办公文件中的合理使用

通过ＷＰＳ汉字编辑软件在处理质检办公文件的合理应用，提出了使用ＷＰＳ某些功能键的技巧，可使文件处理更规范，更完整。     

论社会主义市场经济下主体道德人格的塑造

塑造适应社会主义市场经济的现代道德人格,是进行道德建设的重要内容。社会主义市场经济要求社会主体具有共同的理想和精神支柱、牢固的爱国主义精神、高尚的为人民服务意识。社会主义市场经济要求社会主体高扬集体主义旗帜,具有坚定的法纪诚信观念和规则意识,并具备不断开拓进取的主观精神状态。     

论"入世"后我国农产品市场不利因素的逆转性

“入世”对我国农产品市场虽然会造成诸多不利因素，然而，这些因素将会得到逆转。这是因为：一方面，“入世”后，这些因素客观上具有逆转的必然性；另一方面，通过调整农村产业结构、扩大集约化规模经营以及实施各种利农政策，从主观上说，这些不利因素亦具有逆转的可能性。     

聚集纺纱工艺原理及优越性

聚集纺纱是一种新型纺纱技术 ,其在设备上的实现主要通过对传统牵伸装置的改进。 Rieter和 Suessen等设备采用多孔皮圈或透气的网格皮圈在气流的作用下聚集纤维 ,也有的设备采用大直径的有孔空心滚筒代替原有的前下输出罗拉 ,并在气流的作用下对纤维进行有效而又柔和的约束 ;同时介绍了聚集纺纱的优越性及其对后道工序的影响     

Tax-Induced Intra-Year Patterns in Bonds Yields

The ratio of the yields on short-term tax-exempt and taxable bonds exhibits a sawtooth pattern that is consistent with the impacts of tax deferments from dates on which interest payments are received to dates on which the resulting tax payments are paid. The effect of the tax deferment at turns of calendar years does not differ appreciably from the effect at the turn of any other tax quarter. Investors with tax payment schedules that differ from that of the investor that is indifferent between investing in taxable and tax-exempt bonds may benefit from tax-related timing strategies for investing in these bonds. Issuers may benefit from tax-related timing strategies for scheduling interest payments.     

股份制取代合作制是历史的必然——对中国农村金融制度选择的思考

目前，合作金融在中国遇到了种种困惑，这不是合作金融本身的错。一方面中国从来就没有建立过真正的合作金融；另一方面合作金融与中国当前的经济环境也不相适应。而那种异化了的合作金融既没有存在的必要，也没有存在的可能。股份制取代合作制是一种历史的必然。     

对外贸易对我国生态环境影响的实证分析

学术界对对外贸易与生态环境的关系还存在争论。本文建立了对外贸易影响环境的投入产出分析模型，并以此模型为基础，利用我国2002年投入产出表和我国能源消费数据，对我国2002年对外贸易对环境的影响进行了实证分析，得出了对外贸易有利于我国生态环境改善的结论。