德士古渣油气化系统数学模拟

对德士古渣油气化系统进行了过程分析,建立了单元设备物料和热量衡算的数学模型,提出了计算气化炉微量组分的方法。运用序贯模块法对该系统进行了稳态模拟计算,结果同设计值和工厂值吻合较好。     

Granzyme B is recovered by natural killer cells via clathrin-dependent endocytosis

When they recognize a target cell, natural killer (NK) cells mount an attack to kill the target by exerting their cytotoxicity via the exocytosis of cytotoxic granules. Although the details of this process (which includes the movement of cytotoxic granules in the immune synapse and their fusion with the plasma membrane, releasing granzymes and perforin into the synaptic cleft) are relatively better understood, the post-exocytosis regulation of the process is still largely unknown. Here we show that a clathrin-dependent endocytosis stimulated by target cell occurs in NK92 cell line, which is closely correlated with granzyme B recovery. Inhibition of the endocytosis significantly attenuates the cytotoxicity of NK92 cells. The NK cell recovery of its released effector molecules, in turn, suggests that endocytosis may well play a key role in the post exocytosis regulation of immune cells.     

制造信息系统的有序性测度理论研究

为了测度制造信息系统的有序性,研究了制造信息系统的有序程度与制造信息之间的关系.首先将制造信息分为车间设备信息、制造执行信息、流程管理信息、业务决策信息和战略决策信息5个层次,并根据制造信息所在的层次定义了制造信息绝对信息量的评分标准及同一层次内部信息重要性的评分标准;然后采用Shannon的信息论计算制造信息的信息量,并结合前述的两个评分标准计算每个信息的绝对信息量;再结合制造信息量之间的相关性系数,确定各个制造信息的独立信息量.制造信息系统中所有独立信息的总量就是制造信息系统的信息总量;另外,当制造信息系统处于极端条件下时,其信息总量会出现最大值与最小值,根据这三个值,文中找到了评价制造信息系统有序性的参数并称之为系统有序度Θ(t).使用系统有序度Θ(t)来测度制造信息系统的有序性时,系统有序度越大,制造信息系统的有序性越高.     

高校足球运动中的民族团结进步建设——以大连市高等院校足球赛(校园组)为例

运用文献资料法、问卷调查法、访谈法、数理统计等研究方法,对大连地区2015-2017年高等院校(校园组)足球赛少数民族学生参与情况进行研究分析。结果显示:在参加比赛的少数民族中,维吾尔族和朝鲜族人数最多;近三年中维吾尔族学生参赛人数逐年上升,其原因与新疆维吾尔自治区的民族文化和社会环境影响有较大关系;参与足球运动并对足球队进行有效的管理,有助于不同少数民族之间相互认同,具有促进少数民族交往和民族团结进步的意义。     

A New Method of Portfolio Optimization Under Cumulative Prospect Theory

In this paper,the portfolio selection problem under Cumulative Prospect Theory(CPT) is investigated and a model of portfolio optimization is presented.This model is solved by coupling scenario generation techniques with a genetic algorithm.Moreover,an Adaptive Real-Coded Genetic Algorithm(ARCGA) is developed to find the optimal solution for the proposed model.Computational results show that the proposed method solves the portfolio selection model and that ARCGA is an effective and stable algorithm.We compare the portfolio choices of CPT investors based on various bootstrap techniques for scenario generation and empirically examine the effect of reference points on investment behavior.     

Ground demonstration system based on in-orbit assembly oriented manipulator flexible force control

To eliminate the load weight limit of carrier rockets and reduce the burden on support struc-tures,in-orbit assembly is a key technology to make design of scattering a large diameter telescope into submirror modules, which requires smooth operation of assembly robots, and flexible force con-trol technology is necessary.A ground demonstration system is presented for in-orbit assembly focu-sing on flexible force control.A six-dimensional force/torque sensor and its data acquisition system are used to compensate for gravity.For translation and rotation, an algorithm for flexible control is proposed.A ground transportation demonstration verifies accuracy and smoothness of flexible force control, and the transportation and assembly task is completed automatically.The proposed system is suitable for the development of in-orbit assembly robots.     

多胺基针刺布的制备及其在H2S去除中的应用

为了解决含硫化氢(H_2S)废气的高效净化问题,直接以腈纶针刺布为原材料,通过一步反应制备了多胺基针刺布,测得其交换容量为5.9 mmol/g,并用红外光谱和热分析技术对其进行了表征;研究了碱液存在下多胺基针刺布对H_2S的去除性能及气体流量、碱液浓度、增重率、氧含量和H_2S浓度等因素的影响,结果表明碱液和多胺基针刺布的协同作用对气体中的H_2S具有优异的去除性能.吸附饱和的多胺基针刺布可用碱液再生,且再生后性能无明显变化,在所设定实验条件下,针刺布处理容量和碱吸收容量分别稳定在30.6 mg/g和697.2 mg/g左右.     

复合材料连续组合梁的固有振动频率

本文将复合材料多跨连续组合梁按单跨梁来处理，采用铁摩辛柯梁振动理论及Laplace变换导出了复合多跨连续组合梁自振时的振型函数及频率方程．     

DMGSP:一种快速分布式全局序列模式挖掘算法

为了解决分布式环境下挖掘全局序列模式常产生过多候选序列,加大网络通信代价问题,提出了一种基于分布式环境下的快速挖掘全局序列模式算法--DMGSP.该算法将分布式环境下的各站点得到的局部序列模式压缩到一种语法序列树上, 避免了重复的序列前缀传输. 采用合并树中结点序列规则和项序扩展策略,对非频繁序列进行剪枝,有效地约简了候选序列,减少了网络传输量,从而快速生成全局序列模式.算法分析和实验结果表明,在大数据集环境下的DMGSP算法性能优越,能够有效地挖掘全局序列模式.     

p-可分解群的一个定理

极小子群在有限群的研究中占据着重要的地位．本文利用了极小子群的弱c-正规性刻画了极小子群对有限群构造的影响，得出了p-可分解群的一个结果．