The effect of natural gas discoveries in Israel on the strength of its currency

In light of the natural gas discoveries in the Mediterranean Sea and their impact on the Israeli economy, I must assess the change in the exchange rate and its impact on the foreign exchange market. There are numerous positive social impacts resulting from the gas discoveries including optimising Israel's energy security and its move to cleaner energy. However, not all of the consequences of discovering natural resources may be positive. One possibly negative outcome could be the well-known phenomenon called the “Dutch disease” in which the discovery of a natural resource can cause a country's currency to spike. To investigate whether the strengthening of the Israeli currency in recent years is a symptom of the “Dutch disease” I used daily and intraday event study methodology to explore the changes in the real exchange rate of the Israeli shekel and the US dollar between 2008 and 2017, according to announcements related to the gas discoveries published during this period. In addition, I examined whether an increase in the real exchange rate was a result of the publication of announcements about natural gas harming the manufacturing and industrial sectors. I found that announcements related to gas discoveries did affect the real exchange rate and caused an appreciation of the Israeli shekel. Investors could analyse the announcements and achieve an abnormal return in the foreign exchange market. In addition, investors' expectations of an appreciation in the real exchange rate causes damage to various manufacturing and industrial sectors.     

一种低轨双星窄带信号定位方法

针对低轨双星系统对窄带辐射源无源定位的应用场景，基于双星观测到的辐射源到达频率差，提出了一种多次频差测量联合估计辐射源位置的方法。详细描述了算法原理、算法处理步骤，并通过计算机仿真分析了信号频率、频差测量误差、观测时长等因素对定位精度的影响。仿真分析表明，在观测时间大于20 s、频差测量精度0.1 Hz时，该方法定位精度优于1.5 km，具有较强的工程应用价值。     

契比雪夫加权应用被动合成孔径处理算法研究

提出了将契比雪夫加权应用于被动合成孔径处理算法。被动合成孔径技术对小孔径 基阵沿直线运动接收到的信号进行合成处理，从而达到虚拟大孔径基阵方位分辨力效果。将 契比雪夫加权应用于线阵合成孔径前后波束图的指向性研究，对主瓣宽度变化予以合理解释 。理论分析结合仿真验证表明，被动合成孔径处理算法应用契比雪夫加权可以在给定的旁瓣 高 度要求下获得等旁瓣级，等旁瓣级下可提高对弱目标信号的检测分辨能力。     

制造业竞争力对人民币升值的敏感性——基于长三角制造业面板数据的实证分析

利用2005—2010年我国长三角地区21个制造业的面板数据,基于面板数据模型,分析了人民币升值与长三角地区的制造业全行业、劳动密集型产业、技术密集型产业、资本密集型产业的国际竞争力的关系。研究结果显示:人民币升值会导致由人均制造业出口额代表的长三角地区制造业全行业的国际竞争力水平降低;分行业看,人民币升值对技术密集型产业和资本密集型产业的国际竞争力水平的影响较劳动密集型产业更大。     

反隐身预警雷达的发展动态与新技术

预警雷达一直是战场防空和国土防御的基本装备之一，而隐身飞行器的出现迫使现代预警雷达必须提高其反隐身能力。首先从雷达的工作频率、目标的极化信息和非后向散射特性剖析了现代预警雷达的反隐身关键技术，然后根据不同的雷达体制对典型反隐身预警雷达进行分类综述，最后总结了多输入多输出、低截获概率、太赫兹超宽带、微波光子相控阵、第三代半导体和基于数学模型的网络优化等新技术的特点和难点，并展望了反隐身预警雷达需进一步研究的方向，以期为反隐身预警雷达相关设计人员提供一定的帮助和参考。