微内容序化方法与应用实例

以Web2.0技术产生的微内容杂乱无序、难以利用的问题为出发点,应用信息组织理论和序化思想,研究如何对微内容进行汇总、序化加工,形成有序的、易于理解与利用的综合信息,包括：设计对微内容加工的方法,构建Web2.0信息加工框架,为Web2.0网站建设及改进提供依据,并探索微内容信息利用的方式。     

基于耗散结构理论的科研数据管理系统概念模型及运行策略

大数据环境下为实现科研数据共享和有效使用,笔者引用耗散结构理论,分析科研数据管理系统耗散结构的4大特征,基于此建立科研数据管理系统耗散结构概念模型,通过引入熵流来展现科研数据管理系统达到有序均衡所需的目标,提出引入外界负熵来控制系统中正熵增长的思路来解决科研数据管理的问题,实现科研数据的有序管理,提供实践型的理论依据和参考价值。     

齐次cantor集与偏齐次cantor集的关系

设μ（I,{nk}k≥1,{ck}k≥1）为闭区间I,正整数序列{nk}k≥1及正实数序列{ck}l≥1确定的Moran集,c（I,{nk},{ck}）c（I,{nk},{ck}）分别为μ{nk}k≥1,{ck}k≥1的齐次Cantor集与偏齐次Cantor集,给出了齐次Cantor集与偏齐次Cantor集的关系及证明。     

布尔代数的一个等价性定义的证明

证明了布尔代数等价于一个只有二元部分运算的代数系统。     

基于产品部分检验的设备单行布局建模与仿真

为解决基于确定性生产、单目标优化和产品全检构建的数学模型不能全面、真实地反映车间设备布局需求的问题,构建不确定性环境下多产品生产、多目标组合优化的模糊数学模型.考虑到产品部分检验对物流距离的影响,修改物流成本计算公式;运用eMPlant软件进行问题仿真选优,讨论仿真稳态设置对仿真结果的影响.实例应用表明,该方法具有可行性和实用性,更贴合实际生产,可为相关研究提供参考.     

基于排队论的快餐厅点餐模式优化研究

快餐厅日益成为人们生活的一部分,但是在快餐厅点餐时排队时间过长逐渐引起了顾客的不满。基于排队论对快餐厅点餐模式进行优化研究,讨论当前多队列多服务台的点餐模式,给出一种单队列多服务台的点餐模式,并对两种点餐模式进行比较,结果表明快餐厅采用单队列多服务台的模式经营,可提高服务质量和经济效益。     

近12年来黄土高原植被覆盖对年内水热条件的响应

基于1999-2010年SPOT-VEGETATION旬值NDVI数据,通过经改进的时滞偏相关等方法,并结合该地区降水量和气温数据,解释植被覆盖年内变化对气候要素的响应.结果表明: ①年内植被覆盖变化与气温的变化较为一致,气温较降水对年内植被生长影响强烈;②植被覆盖低、降水量小、气温低的地区与降水量的年内相关强,滞后时间集中于0旬~3旬;③植被覆盖与气温的年内相关程度不受降水量与气温空间分布的影响,滞后时间集中于2~3旬与8~9旬;④水热组合较好的植被覆盖高的地区,植被覆盖均对降水量与气温的年内响应敏感,相反则敏感程度降低,气温对黄土高原植被覆盖的年内影响占主导地位,农业生态区与山地森林生态区植被覆盖年内变化主要受气温的影响,降水影响不明显;⑤黄土高原西北部和西南部降水或气温的单独影响不利于植被生长,黄土高原西北部,环境干旱,植被稀疏,其植被覆盖与降水量的年内相关较强,但是植被生长相对于其他地区较为迟缓;黄土高原西部,植被覆盖与气温的年内相关程度相对不明显且迟缓.主要是由于黄土高原西北部和西部,降水或气温远低于黄土高原平均水平,而在单气候因素影响下植被生长会受到抑制造成的.     

The effects of transport by pneumatic tube system on blood cell count,erythrocyte sedimentation and coagulation tests

Introduction:

Today, the pneumatic tube transport system (PTS) is used frequently because of its advantages related to timing and speed. However, the impact of various types of PTS on blood components is unknown. The aim of this study was to examine the influence of PTS on the quality of routine blood cell counts, erythrocyte sedimentation, and certain blood coagulation tests.

Materials and methods:

Paired blood samples were obtained from each of 45 human volunteers and evaluated by blood cell count, erythrocyte sedimentation, and several coagulation tests, including prothrombin time (PT) and activated partial thromboplastin time (aPTT). Blood samples were divided into 2 groups: Samples from group 1 were transported to the laboratory via the PTS, and samples from group 2 were transported to the laboratory manually. Both groups were evaluated immediately by the tests listed above.

Results:

The blood sample test results from groups 1 and 2 were evaluated and compared. No statistically significant differences were observed (P = 0.069–0.977).

Conclusion:

The PTS yielded no observable effects on blood cell counts, erythrocyte sedimentation, or PT and aPTT test results. We concluded that the PTS can be used to transport blood samples and yield reliable results for blood cell counts, erythrocyte sedimentation, and several coagulation tests.     

The Concept of Tens and Hundreds in Students with Down Syndrome

ABSTRACT

We present an evaluation of the understanding that adolescents and adults with Down syndrome (DS) have of the decimal number system. The results of two studies are presented. The first was a case study with interviews of three adolescents and three adults with Down syndrome. Our results indicate that their conceptual understanding of the meaning of the tens and hundreds places is not as well developed as their ability to read, write and work with numbers of up to three digits. We also analyse the progress made by a 17- year-old student with Down syndrome after following a learning programme intended to improve her understanding of the tens place. To this end, we designed number tasks using four constructs: counting, grouping, partitioning and ordering. The student’s achievements in the counting construct were greater than in the others, exhibiting an understanding and use of the tens as a unit of counting to solve many of the number tasks proposed. Also evident was a progression in her understanding of the positional value. We observed differences in her success rate and variability in her responses depending on the method used in the tasks to represent the numbers.     

运用组合公式求特殊级数的部分和

运用组合公式Cnk=Cn-kn,Ckn+1=Ckn+Ck-1n推导并证明了级数∞n=1∑n(n+1)…(n+k-1)(k∈N,k≥1)的前n项部分和的一般公式;同时给出了级数∞n=1∑nk(k∈N,k≥1前n项部分和的求法.