捷联惯导系统仿真器的设计

提出了一种通用捷联惯导系统仿真器的设计方案、根据捷联惯导系统的特点，利用面向对象技术进行模块分解，设计出了可以模拟多种环境、扩展性很强的仿真器，为相关导航系统算法的验证提供数据源、     

洛克和霍布斯自由主义思想比较

通过简单分析古典自由主义产生的时代背景,以及他本身的理论表达,以此为前提来分析霍布斯 和洛克的政治思想,并分析他们各自理论中的自由主义因素,进而比较他们政治理论表达的不同以及他们的理 论在自由主义历史发展的影响和它们的历史意义。     

Viola baoshanensis, a plant that hyperaccumulates cadmium

This paper reports upon the finding of Viola baoshanensis, a cadmium (Cd) hyperaccumulator through field survey and greenhouse experiments. Average Cd concentration in the shoots and roots of V. baoshanensis growing on Baoshan lead/zinc mine in Hunan Province, China, was 1168 and 981 mg/kg, respectively, varying from 456 to 2310mg/kg in the shoots, and from 233 to 1846 mg/kg in the roots.The ratio of Cd concentration in shoot to root (DW) and that in plant shoots to total concentration in surface soil was 1.32 and 2.38, respectively. Under nutrient solution culture, biomass (DW) of V. baoshanensis exposed to 0-30 mg/L Cd insolution increased with Cd supply increasing and reached a maximum at 30 mg/L Cd. Further increase of Cd concentration (40, 50 mg/L) in solution significantly reduced biomass.Cd concentration in the shoots was positively correlated with Cd concentration in the culture medium. Cd concentration in the shoots reached 4825 mg/kg at 50 mg/L Cd solution. Theratio of Cd concentration of shoots to roots in V. baoshanensis was greater than 1 at all Cd treatments, with an average of 1.67 (1.14-2.22). The results indicate that V. baoshanensis is a Cd hyperaccumulator plant.     

An SNP polymorphism（-844C／T） in the promoter of catalase gene leads to differential expression

Imbalance of redox state has been associated with human diseases, such as cardiovascular diseases, Huntington‘s disease and Alzheimer‘s disease. Catalase, an important antioxidant enzyme, decomposes H202 into O2 and H2O, therefore limiting the deleterious effect of the reactive oxygen species (ROS). Previous study showed that a C-T polymorphism, located at -844 bp from the translational start site of catalase, is strongly associated with essential hypertension in an isolated Chinese population of Xiangchang country, Anhui Province. To explore the impact of SNP-844C/T on the expression of catalase, human catalase promoters containing either SNP-844C or T variant were subcloned into the pGL3Basic luciferase vector.     

Deep-water Earliest Oligocene Glacial Maximum （EOGM） in South Atlantic

The most prominent cooling event of the Earth surface during Cenozoic in the long-term transition from a non-glaciated planet, or “green-house world”, to a polar, glaciated planet, or “ice-house world”, is the Earliest Oligocene Glacial Maximum (EOGM) above the Eocene/Oligocene boundary at about 33.7 Ma. Planktonic and benthic foraminiferal oxygen and carbon isotopes, carbonate content, and coarse fraction, along with high-resolution color reflectance and magnetic susceptibility records during 35-30 Ma, from deep-water Sites 1262 and 1265, Ocean Drilling Program (ODP) Leg 208 in South Atlantic, reveal the global cooling event occurring in both surface and deep oceans. The results show that the earliest Oligocene δ^18O values during 33.5-33.1 Ma represent the magnitude of continental ice sheets on east Antarctica and indicate the large decrease in both surface and deep water temperatures of worldwideoceans. The δ^13C records show the large excursion during the period of EOGM event and indicate some types of shift in global carbon reservoir, probably demonstrating the sudden increase in organic carbon burial rates and the changes in the distribution and timing of production. At the same time, lithologic composition, carbonate content, color reflectance, and coarse fraction brought about significant changes close to the Eocene/Oligocene boundary, reflecting the abrupt deepening in the carbonate compensation depth (CCD). Changes in carbonate content were revealed from the color reflectance identify periodicities associated with eccentricity of the Earth‘s orbit (100 and 400 ka), further indicating orbitally forced global climate variations in the Early Oligocene.     

重组人尿激酶原氨基末端片段的制备及活性测定

尿激酶原的N-末端135个氨基酸片段包含了表皮生长因子结构域和环柄结构域，参与了尿激酶原和其受体的结合以及尿激酶原诱导的化学趋化活性．利用RT-PCR，从人脐带静脉内皮细胞中克隆ATF基因．将ATF基因插入pET-29a( )中构建表达质粒pET-29a( )／ATF，并转化至大肠杆菌BL21(DE3)中，经IPTG诱导表达及纯化后，从每升培养液中获得15mg rhATF，其纯度超过95％．活性测定结果表明rhATF能够阻断尿激酶原与尿激酶受体的结合，并能抑制尿激酶对纤溶酶原以及纤溶酶对尿激酶原的激活．     

整合供应链管理推进产业集群化的优势与对策分析

针对近几年越来越明显也越来越引起广泛关注的产业集群化现象，通过分析供应链在产业集群化中的作用后提出，产业集群化实质上是一条或多条供应链在一定地理区域里局部集中的过程，分析了供应链的价值增值过程，为通过整合供应链管理来推进产业集群化发展提供依据。     

机会约束下的均值-VaR组合投资问题

结合均值一方差模型和机会约束模型提出在允许卖空时的机会约束下的均值-VaB模型，它是以期望收益率与置信水平为导向的．在假设投资收益率服从正态分布的条件下，建立了其数学模型，讨论了最优解的存在性与唯一性，得到了最优解的解析表达式，并用Matlab语言给出求解程序，最后举例予以说明并验证了两个重要结论．     

一种MPEG2媒体同步控制算法

针对MPEG2软件解码器,提出了一种媒体同步控制算法。该算法无需调整解码器的本地系统时钟,而是以音频流为主媒体流,视频流为从媒体流,音频的播放速率保持不变,利用基于相同时间基点的媒体单元的播放时间标签,调整视频的播放帧率来实现媒体同步。同步调整后视频的同步比例由调整前的54.84%提高到99.52%,音视频的同步比例由调整前的5.07%提高到98.36%。结果表明,该算法可以实现解码器的媒体同步,满足用户提出的感知服务质量要求。     

基于最大模糊熵原理的多阈值图像分割新算法

基于最大模糊熵准则,提出了一种新的多阈值图像分割算法。该算法通过定义一种简单的线性模糊隶属度函数,将图像模糊划分为若干个不同的区域;同时采用自适应遗传算法搜索最大模糊熵准则下图像的一组最佳分割阈值,并对遗传算法中的编码方式及交叉算子、变异算子进行了一些有益的改进,极大地减少了计算量和存储空间,加快了算法的搜索速度。通过仿真实验证明该算法对复杂图像良好的分割效果和较强的实时处理能力。