一种基于MIMO-OFDM技术四发射天线多接收系统的设计

MIMO-OFDM技术不仅能够实现很高的传输速率而且通过分集实现很好的可靠性.设计了基于MIMO-OFDM技术四发多收天线的系统,针对随着收发天线数量增多接收机编码和译码算法复杂度随之提高的问题,选择适合多天线技术且具有低复杂度的正交空时分组码技术,接收端采用最大似然译码,调制采用多进制相移键控。通过仿真验证了该方案设计正确,证明了系统具有良好的差错性能和较高的频谱利用率。     

基于多元时间序列融合的飞行动作识别方法

针对飞行动作数据随机性强与长度不一致的问题,提出通过减小动态时间规整(DTW)算法的搜索空间,并定义不同特征参数贡献度的概念,实现对飞行数据的多元时间序列融合,从而完成对战术机动动作的识别。通过引入预分类和细分类结合的方式,对动作数据进行预处理,然后根据改进的动态时间规整(WDTW)算法对待测数据进行识别。仿真实验表明,相比传统DTW算法,WDTW算法通过降低算法复杂度,识别计算时间变化明显;对核密度与精准度系数的分析表明识别准确率亦有所提高。实验结果验证了所提方法的准确性。     

有选择学习人工神经网络BP算法

模拟人脑学习提出一个有选择学习的改进的BP算法(SSBP) , 提高了学习速度, 具有一定打破学习性僵局的能力.     

由等值线图反求网格节点值的原理与方法

本文提出由等位线图求取任意网格划分下全部网格点值的图象处理算法。它是目前广泛流行的由离散网格点值绘制等值线图问题的反问题。本文详细讨论了该问题的原理、算法及实例与主要用途。     

多重介质油藏试井软件

本文基于近年来对我国现有的碳酸盐岩油气田各种渗流模式的研究,运用最优化的理论与方法(主要是多变量非线性规划的方法),提出了一套以实现压力恢复曲线的最优化拟合为目标,反求地层参数的试井资料分析方法,并编制了相应的计算机试井分析软件,其功能是用计算机自动完成试井曲线类型的识别和地层参攀的确定,考虑到为便于在油田二级指挥部或矿区大队推广使用,软件的编制特别注意照顾能在微型机上推广使用的特点。该套软件的基本功能是:能对单重介质、双重介质、裂缝性油、气藏等不同地质条件下的油、气井测试资料进行自动分析处理;准确地解释出油气藏的各项基本参数,包括:渗透率,井筒储存系数,表皮系数,流动系数,导压系数,窜流系数,弹性容量比,裂缝长度,平均油藏压力,单井控制储量,断层距离,断块形状,边界性质等。该软件是认识油(气)井和油(气)藏特性的重要工具。     

龙海麻鸭自然感染菲莱氏盲肠温扬球虫亚种(Wenyonella philiplevinei caecum)季节动态及内生殖各期虫体多糖的细胞化学

对厦门地区龙海麻鸭自然感染菲莱氏盲肠温扬球虫亚种的季节动态进行了调查,结果表明一年四季均可感染,其中流行高峰期是３～７月．对盲肠组织进行石蜡切片的细胞化学染色,显明：成熟的裂殖体含有多糖,成熟大配子体、小配子体和卵囊ＰＡＳ反应呈阳性,而滋养体、早期的大小配子体ＰＡＳ反应呈阴性     

A new implementation of image-processing engine for 3D visualization and stereo video stream display

This paper presents a new implementation of a high-definition image-processing engine,which mainly targets the 3-dimensional(3D)visualization and stereo video stream display of binocular display equipment.The engine is compatible with the mainstream analog and digital stereo videos in component format and is able to receive stereo composite video broadcast signals using an integrated analog stereo video decoder.The four modules include a spatiotemporal scaling transform engine,a 2D–3D converter,an image animating engine,and a 2D scalar operating in pipeline architecture to implement the video format conversion and the stereo effect enhancement.Furthermore,the data access,hardware structure,and system-level configurations are optimized.Finally,the proposed architecture is realized by 0.18 lm CMOS technology.The application-specific integrated circuit verification results show that the engine can generate a strong feeling of 3D immersion and highdefinition image quality with minimal flicker.The chip has wide compatibility and an uppermost 1080P-processing capacity,which has approximately 3.5 million gates with about 43 mm2 die size.     

TRPV3 is a calcium-permeable temperature-sensitive cation channel

Transient receptor potential (TRP) proteins are cation-selective channels that function in processes as diverse as sensation and vasoregulation. Mammalian TRP channels that are gated by heat and capsaicin (>43 degrees C; TRPV1 (ref. 1)), noxious heat (>52 degrees C; TRPV2 (ref. 2)), and cooling (< 22 degrees C; TRPM8 (refs 3, 4)) have been cloned; however, little is known about the molecular determinants of temperature sensing in the range between approximately 22 degrees C and 40 degrees C. Here we have identified a member of the vanilloid channel family, human TRPV3 (hTRPV3) that is expressed in skin, tongue, dorsal root ganglion, trigeminal ganglion, spinal cord and brain. Increasing temperature from 22 degrees C to 40 degrees C in mammalian cells transfected with hTRPV3 elevated intracellular calcium by activating a nonselective cationic conductance. As in published recordings from sensory neurons, the current was steeply dependent on temperature, sensitized with repeated heating, and displayed a marked hysteresis on heating and cooling. On the basis of these properties, we propose that hTRPV3 is thermosensitive in the physiological range of temperatures between TRPM8 and TRPV1.     

论明清工商会馆的经济管理功能

通过对目前检索到的196所山陕会馆资料的分析，论证了工商会馆在中国现代化征兆出现的历史条件下，所发挥的经济管理功能．认为工商会馆是富有中国特色的经济和社会管理制度的创新，其对中国早期市场经济因素的产生具有重要的推动作用．     

谈图书馆的自我推销

文章通过对上虞市有典型的商业推销案例的阐述,结合上虞市图书馆现状的分析,从而认为图书馆可以有一套自我推销的实践之路,给出了一系列图书馆自我推销的大胆设想。