一类捕食系统的数学模型与分析研究

对有Ⅱ类功能反应、至多只有两个种群密度制约,且是周期系数的三维循环捕食系统建立了数学模型,得出了该系统模型的一致持续生存和存在周期解的条件。     

ILASII网上图书预约服务的开通与系统功能分析

本文叙述了ILASII的网上图书预约服务的开通利用管理方法，包括系统设置和流通一线操作，也讨论了该服务的系统设置功能的几种不足之处及我馆应用中的处理措施。     

固相萃取光度法测定环境样品中锌的研究

研究了新试剂硝基苯并噻唑重氮氨基偶氮苯(NBTDAA)与锌的显色反应.在pH=10的硼砂-氢氧化钠缓冲介质中,TritonX-100存在下,NBTDAA与锌反应生成2∶1稳定络合物,体系最大吸收波长λm ax=528 nm,摩尔吸光系数ε=1.34×105L/(moL.cm),样品中的锌用强阴离子交换固相萃取柱固相萃取预分离和富集后用该方法测定,结果令人满意.     

论卫礼贤的汉学成就与地位

卫礼贤是19世纪90年代由德国新教传教组织同善会派往中国的传教士。他在华20多年潜心研究中国传统文化,对中国和中国文化有独特而深刻的认识,成为“伟大的德意志中国人”,是二十世纪初叶蜚声欧美学术界的著名汉学家。他和他在汉学领域里所取得的杰出的学术成果在中国文化研究和中西文化交流等方面产生过重要的历史影响,值得后人尊敬和研究。     

EDA技术在控制系统中的应用

通过对系统进行结构分析,采用层次化的设计方法,给出了控制器的VHDL程序,利用MAXPLUS II对其程序进行了仿真,并给出了仿真结果。     

Thematics and products in American magazine advertising containing children, 1940–1950

To assess changes in thematic and value depictions in American magazine advertising containing children from 1940 to 1950, a content analysis coded advertisements for themes/genres, product‐types, and connections of ad‐child to ad‐product. While results indicate significant increases in the number of advertisements containing children in the postwar years, findings also show the majority of those advertisements to be for “adult‐oriented products.”; However, postwar advertising images also hail children in larger amounts as observed through various personalizing aspects. For example, children are increasingly shown in the postwar period “looking at,”; “reaching for,”; or “using”; the ad‐product. There are also significant postwar increases in the favorable reaction of the ad‐child to the ad‐product itself, rather than to product use. As expected there are several inter‐period thematic shifts, particularly those of “war/home front”; and “teen social”;. Finally, image assessments point to postwar shifts in the value associations taking place between ad‐children and ad‐products.     

Modeling and multi-objective optimization of a gasoline engine using neural networks and evolutionary algorithms

In this paper, a multi-objective particle swarm optimization （MOPSO） algorithm and a nondominated sorting genetic algorithm II （NSGA-II） are used to optimize the operating parameters of a 1.6 L, spark ignition （SI） gasoline engine. The aim of this optimization is to reduce engine emissions in terms of carbon monoxide （CO）, hydrocarbons （HC）, and nitrogen oxides （NOx）, which are the causes of diverse environmental problems such as air pollution and global warming. Stationary engine tests were performed for data generation, covering 60 operating conditions. Artificial neural networks （ANNs） were used to predict exhaust emissions, whose inputs were from six engine operating parameters, and the outputs were three resulting exhaust emissions. The outputs of ANNs were used to evaluate objective functions within the optimization algorithms： NSGA-II and MOPSO. Then a decision-making process was conducted, using a fuzzy method to select a Pareto solution with which the best emission reductions can be achieved. The NSGA-II algorithm achieved reductions of at least 9.84%, 82.44%, and 13.78% for CO, HC, and NOx, respectively. With a MOPSO algorithm the reached reductions were at least 13.68%, 83.80%, and 7.67% for CO, HC, and NOx, respectively.     

What are these among so many? Pre and post Vatican II recordkeeping

Contemporary Church recordkeeping has been an area all too often ignored by historians and archivists. There were two significant events in the last 140 years that defined the types of records created and maintained within the Church namely: Vatican I and Vatican II. After the suspension of Vatican I and the promulgation of Pastor Aeternus, we begin to see a centralization in ecclesiastical governance structures, due in part to interpretations of papal primacy. This centralization of Church authority eventually impinged upon the recordkeeping processes of dioceses. However after Vatican II the pendulum shifted with the promulgation of the Decree Concerning the Pastoral Office of the Bishop and the re-introduction of the tenet of collegiality. The promulgation of this document and others caused a de-centralization of Church recordkeeping practices. Using the Archdiocese of Vancouver as a case study this paper will attempt to show recordkeeping changes that occurred after Vatican I and Vatican II and the impact these councils had on archdiocesan administration.     

HDAC1、8在肺泡Ⅱ型上皮细胞间质转化中的表达及意义

目的：观察TGF-β1作用下,肺泡Ⅱ型上皮细胞RLE-6TN在EMT过程中HDAC1、8的表达情况及TSA对TGF-β1诱导细胞EMT的影响。方法：将TGF-β1加入到体外培养的细胞中,于不同时间收取细胞,采用WB及Real-time RT-PCR检测HDAC1、8及E-cad、α-SMA的表达情况。然后将TGF-β1加入经过TSA预处理的细胞中,于不同时间收取细胞,重新检测上述基因。结果：加入TGF-β1后,E-cad蛋白表达下调;α-SMA蛋白表达上调;HDAC1蛋白表达上调;HDAC8蛋白表达下调。E-cad mRNA表达下调;α-SMA及HDAC8的mRNA均于12 h表达上调,6 h、24 h表达下调;HDAC1 mRNA表达于6 h下调,24 h上调。加入TSA后,E-cad蛋白表达上调;α-SMA、HDAC1及HDAC8蛋白的表达均下调。E-cad mRNA表达上调;α-SMA mRNA表达于6 h、12 h上调,24 h下调;HDAC1 mRNA表达下调;HDAC8 mRNA表达上调。结论：TGF-β1体外诱导的RLE-6TN细胞EMT,可以通过应用TSA抑制其获得α-SMA表型、失去E-cad表型,从而部分逆转TGF-β1诱导的肺泡Ⅱ型上皮EMT。