一种适应复杂电磁环境的重频跟踪方法

针对现代电子战日益复杂的电磁环境以及不断涌现的新体制雷达,本文采用脉冲预测的方法对指定的雷达信号进行重频跟踪。由于脉冲预测的特征规律与目标雷达重复周期精确一致,重频跟踪器解决了如何在复杂电磁环境下进行实时信号跟踪的问题,并且能够适应多种不同体制的雷达信号。     

基于半实物仿真平台的复杂电磁环境评估方法

随着军队信息化建设的加快,复杂电磁环境无疑成为现代信息化战争的基本特征,“制电磁权”将成为作战双方的争夺“制高点”。依据电磁环境的组成和特点,提出了一种基于半实物仿真仿真平台的复杂电磁环境评估方法和分级标准,并通过实例对该方法进行了计算验证,结果表明该方法较好地反映了实验室条件下电磁环境的复杂性,可有效支撑电子装备研究。     

关于建筑环境与暖通空调节能的思考

本文主要分析了建筑环境对于建筑暖通空调节能设计的影响,并结合自身的思考分析了如何进行空调节能设计。     

Predicting construction firm performance: an empirical assessment of the differential impact between industry‐ and firm‐specific factors

It is obvious that the performance of firms hinges upon the dynamics of both industry‐ and firm‐specific factors. A less obvious, and perhaps a more important, line of inquiry is that to the extent that they have a bearing on firm performance, how much do these two groups of factors respectively predict firm performance? To date, performance differences among construction firms that stem from industry‐ and firm‐specific differential effect has remained largely unexplored. Using a dataset comprising 526 firms across various construction‐related sectors, the sector‐by‐sector firm performance variation that is attributable to the heterogeneity of both industry‐ and firm‐specific characteristics was empirically examined. That statistically significant results of different effect sizes are found indicates that although these factors are often assumed to be intertwined it is possible to study their respective impact on firm performance. Future studies could usefully replicate and extend this study to construction firms in other countries to further investigate what drives firm performance under different national, industry and firm contexts.     

高层建筑基本平面形式及布局对城市总体通风的影响研究

该文从平面的视角出发,对高层建筑基本平面形式选择、总平面布局对城市风环境带来的影响进行分析.高层建筑的不同基本平面形式,以及总平面布局中朝向、尺度、外部空间等方面的不同设计决策,对城市总体通风的影响有显著差异.根据定性分析,以及PHOENICS流体动力学软件的模拟结果,总结高层建筑设计中需要考虑的平面选型和布局策略,以保证城市风道畅通,提高城市总体通风效率.     

Elevated radiation fields from dumpsites in Lagos Nigeria – waste management concerns and the way forward

This paper is a rider to the reported high gamma radiation fields around certain ordinary waste sites in Lagos, Nigeria. Exposure groups in the vicinity of these sites are susceptible to radiation risks, among other possibilities of health and environmental hazards, as a result of the waste volumes. Urbanisation requires environment-conscious waste management, especially e-wastes. This study relates Nigeria’s sub-standard waste management to the wider world. There is need for an integrated solid waste management approach.     

俄罗斯矿产资源开发利用及矿业投资环境

中国经济的发展需要有充足的矿产资源作保障，但是一些需求量大的战略性矿产的供给能力已显现出一定程度的不足，为了保障经济的稳定运行，应该加大对外国资源的利用。俄罗斯矿产资源丰富，与中国关系良好稳定，可以作为境外矿业投资的参考地。     

进度控制中监理的地位和行为

分析了监理在工程进度控制中所处的地位,并举例讨论了进度控制的一些措施和技巧。     

改善工作面环境与安全的采煤机工作参数的研究

本文通过综合分析,提出了有效降低采煤机截割粉尘的方法,并从减少粉尘出发,讨论了采煤机有关参数的合理设计问题。所得结论对于降低工作面的粉尘、改善工作面环境和保障工人的健康、延长设备的使用寿命,以及对提高煤炭生产的安全性都具有重要的意义。     

浅论白马铁矿建设条件

从矿石选别性能，外部运输条件，伴生金属以及矿山建设的前期准备工作情况等多方面综合论述了白马铁矿建设的有利条件