用EOS／MODIS—NDVI监测枣树生长状况的分析

为研究遥感技术监测宁夏枣树生长状况，以宁夏灵武马场湖农场和灵武园艺场两个长枣种植基地为研究对象，结合GPS调查，整理2005--2009年红枣生育期过宁夏境内EOS／MODIS晴空资料，并依据红枣气象灾害发生指标，分析红枣生育期归一化植被指数INOV变化及受灾前后的变化规律．结果表明，枣树全生育期INOV变化曲线为双峰型，越冬冻害对枣树前期生长影响大，并随时间推移影响逐渐消退．两基地的冻害分析和变异系数分析说明，园艺场受低温冻害的影响高于马场湖农场．受6月中下旬盛花期热干天气的影响，7月上旬至8月中旬枣树INOV总体上较正常年份偏低，但到了8月下旬后影响消失．运用MODIS-NDVI能够进行快速监测气象灾害，可为在避灾规划及防御、指导种植区选择方面提供参考．     

南昌经济型酒店的SWOT分析

本文结合南昌的实际状况,对南昌市的经济型酒店发展的内部条件和外部环境进行了SWOT定性分析和定量分析,得出了优势和劣势同在,机会大于威胁,宜采取扭转型策略,如经济型酒店的经营理念要创新、加强与江西旅游院校实行校企合作等。     

基于磁性纳米颗粒的温度测量理论模型误差研究

磁性纳米颗粒温度测量技术是一种新型、非接触式磁学测温方法,可以实现肿瘤热疗法中的在体温度实时监测等极端条件下的温度测量,但该技术伴随的温度测量误差问题,严重制约其在更多领域的应用和推广.针对这一问题,从郎之万函数泰勒级数展开式的不同展开项、激励磁场幅值、信噪比三个方面,并通过仿真和实验,分析验证了不同项数的泰勒级数展开项数对温度误差的影响.结果表明,利用五项泰勒级数展开项数逼近郎之万函数,增加激励磁场强度,提高信噪比等方法,能够从理论上解决磁性纳米颗粒温度测量误差较大的难题.     

如何更好地编制建筑工程投标报价

文章结合多年的实践经验,分析了施工企业在经营工作中如何更好地把握市场形势,顺应发展潮流,适应投标环境,发挥企业优势,建立科学、完善的投标管理体系,灵活合理运用报价策略和报价计巧,更好地做好投标报价工作,在竞争日益激烈的市场中立于不败之地.     

室温下的小蛋白折叠研究

目前,无论在实验还是理论研究方面,研究蛋白质的从头折叠即使是小蛋白的折叠也非常困难.在室温下研究蛋白质的折叠过程可以有效的阐述蛋白质折叠机制.笔者从2I9M的线性结构出发,在室温下运行了15 ns的分子动力学模拟,发现它在6.4 ns时成功折叠到了天然态结构,此时的结构与天然态结构的均方根偏差为1.17(A),模拟结构与天然态结构符合的非常好.折叠过程是首先在C端出现了螺旋,随后N端又出现了螺旋,然后螺旋从N端鱼贯式生成,最终形成天然态结构.     

高速公路对凌井沟自然保护区的影响及对策

调查了凌井沟自然保护区动植物区系特征和生态系统特点，分析了高速公路建设对保护区的影响，并提出了生态保护的对策。     

Laser-induced fluorescence: Progress and prospective for in vivo cancer diagnosis

Cancer diagnosis and treatment are of great interest due to the high death rate of cancer.To improve the cure rates of cancer,a diagnostic tool which can detect and treat cancer at initial stages is great needed.Laser-induced fluorescence(LIF) is an adequate analytical technique with advantages of high sensitivity,low sample consumption,short testing time,and suitable for in situ testing.Therefore,it has become one of the most widely used spectroscopic methods for cancer in vivo diagnosis in recent years.This review mainly focuses on the applications of in vivo LIF to distinguish premalignant,malignant from normal tissues in a variety of organ systems,such as lung breast,colon,cervix,esophagus,and bronchus.The potential influence factors for cancer diagnostics and the subsequent suitability of the method to different applications are well discussed.Meanwhile,the technical merits and weaknesses of the LIF technology for cancer diagnosis are also evaluated.Furthermore,different exogenous fluorophores,endogenous fluorophores,and fluorophores synthesized in the tissue are compared on their active principle and effect contrast.The technical potentials of LIF for further development and future applications are also presented as well in this review.     

Investigation of the kinetic mechanism of the demanganization reaction between carbon-saturated liquid iron and CaF_2–CaO–SiO_2-based slags

The demanganization reaction kinetics of carbon-saturated liquid iron with an eight-component slag consisting of CaO–SiO_2–MgO–FeO–MnO–Al_2O_3–TiO_2–CaF_2 was investigated at 1553, 1623, and 1673 K in this study. The rate-controlling step(RCS) for the demanganization reaction with regard to the hot metal pretreatment conditions was studied via kinetics analysis based on the fundamental equation of heterogeneous reaction kinetics. From the temperature dependence of the mass transfer coefficient of a transition-metal oxide(Mn O), the apparent activation energy of the demanganization reaction was estimated to be 189.46 k J·mol~(–1) in the current study, which indicated that the mass transfer of Mn O in the molten slag controlled the overall rate of the demanganization reaction. The calculated apparent activation energy was slightly lower than the values reported in the literature for mass transfer in a slag phase. This difference was attributed to an increase in the "specific reaction interface"(SRI) value, either as a result of turbulence at the reaction interface or a decrease of the absolute amount of slag phase during sampling, and to the addition of calcium fluoride to the slag.     

Single-particle 3D reconstruction on specialized stream architecture and comparison with GPGPUs

The wide acceptance and data deluge in medical imaging processing require faster and more efficient systems to be built.Due to the advances in heterogeneous architectures recently,there has been a resurgence in the first research aimed at FPGA-based as well as GPGPU-based accelerator design.This paper quantitatively analyzes the workload,computational intensity and memory performance of a single-particle 3D reconstruction application,called EMAN,and parallelizes it on CU-DA GPGPU architectures and decouples the memory operations from the computing flow and orches-trates the thread-data mapping to reduce the overhead of off-chip memory operations.Then it exploits the trend towards FPGA-based accelerator design,which is achieved by offloading computingintensive kernels to dedicated hardware modules.Furthermore,a customized memory subsystem is also designed to facilitate the decoupling and optimization of computing dominated data access patterns.This paper evaluates the proposed accelerator design strategies by comparing it with a parallelized program on a 4-cores CPU.The CUDA version on a GTX480 shows a speedup of about 6 times.The performance of the stream architecture implemented on a Xilinx Virtex LX330 FPGA is justified by the reported speedup of 2.54 times.Meanwhile,measured in terms of power efficiency,the FPGA-based accelerator outperforms a 4-cores CPU and a GTX480 by 7.3 times and 3.4 times,respectively.     

Existence and Global Exponential Stability of Pseudo Almost Periodic Solutions of a General Delayed BAM Neural Networks

This paper studies a class of general BAM neural networks with multiple delays. Employing the exponential dichotomy theory and fixed point method, together with constructing suitable Lyapunov functionals, easily verifiable delay-independent criteria are established to ensure the existence and global exponential stability of pseudo almost periodic solutions, which not only generalize but also complement some existing ones. These theoretical results are also supported with numerical simulations.