基于GPU的地形遮挡剔除算法

针对大规模地形场景，以GPU提供的遮挡查询功能为基础，提出了一种基于GPU的遮挡剔除算法。根据增量水平线原理，利用模板缓冲区进行重叠测试，并采用查询列表方法避免了CPU和GPU互相等待造成的延迟。实验结果表明，该算法有效地减少了送入图形流水线的几何数据，并在贴地漫游的情况下，显著提高了场景绘制速度。     

抗冻肽基因在植物表达载体中的构建

植物表达载体P^Bin438经HindⅡ和EcoPⅠ双酶切,回收其HindⅡ－BmaHⅠ-Sal-EcoRⅠ片段和P^UC19HⅢ-EcoRI片段连接,构建成载体记为P^UC38。将含AFP基因的克隆经BamHI,XhoⅠ双酶切,得到的BamHI-AFP-XhoⅠ片段装入P^UC38BanHI-SalⅠ位点,克隆AFP基因。然后再用HindⅢ、EoR1双酶切AFP基因,插入P^Uin438的HindⅢ-EcoRⅠ位点,进而构建成带有AFP基因的植物表达载体,为进一步研究AFP基因在植物中表达奠定了基础。     

贵州省高校研究生生活方式现状的调查研究

通过问卷调查法、数理统计法等对贵州省高校研究生的生活方式的现状进行调查,分析,总结经验,发现不足,为贵州省的人才建设及提高人才的健康水平提供参考性依据。     

H+ passivation of poly-si solar cells processed by different annealing processes

The effects of different annealing processes on the photovoltaic (PV) properties and the spectral response as well as minority carrier lifetime in the bulk of unanalyzed PF₅ ion implantation poly-Si solar cells were investigated. The different hydrogen passivation effects of defects in poly-Si induced by three heat treatment processes are reported. We used RTA-rapid thermal annealing, YAG pulse laser annealing and CTSA-classical three-step annealing for this study. The results show that cells processed by RTA (800°C, 4 sec) achieved the best PV properties and spectral response among all annealed samples. Under this precess condition, no or few defects were induced in bulk. While RTA (>-850°C for 4 sec), CTSA as well as YAG laser processes induced defects of different nature and concentration in the bulk of cells. It is further shown that hydrogen ion implantation significantly improved, the performances of poly-Si cells. It is able to efficiently remove the YAG laser induced defects in bulk. However, it cannot completely passivate the defects induced by CTSA and RTA processes. Biography: LI Jin-chai (1946-), male, Associate professor. Research direction: studies of ion beam modification of materials and films of new functionail materials.     

供应链管理研究的新动向(专辑的序言)

一般认为,供应链是指从原材料到最终产品的运营过程中所包含的各个组织以及他们的活动,其中既包含供应商、制造商、分销商和零售商,也包括贯穿在他们之间的物料流、信息流和资金流等.传统供应链的物流仅考虑物料沿"供应商→制造商→分销商→零售商→顾客"方向的单向流动,或称正向供应链.     

基于水声环境的潜艇阵地优化方法研究

针对现有阵地伏击战法主要根据作战任务对阵地进行规划的不足及水声环境对潜艇隐蔽性和声纳探测效能的影响,系统分析了水声环境对阵地设伏战法的影响,通过建立声纳探测模型,并针对目标深度不确定情况下的探测对策对我潜艇声纳作用距离进行了量化,提供了潜艇伏击阵地的优化配置方法。仿真结果表明该方法对提高潜艇的攻防能力具有较强的实用性。     

运用SAS软件系统对我国农作物受灾及成灾面积的预测分析

运用 SAS软件系统中的一些时间序列建模方法及回归分析方法对我国农作物受灾及成灾面积作了预测分析 ,得到了较高的预测精度 ,为我国的灾害预测提供了一种方便实用的方法 .