Hilbert空间中一类包含集值随机模糊映射的变分包含问题

作者构造了一个迭代算法,解决了Hilbert空间内一类包含H(·,·)-单调集值映射和随机模糊映射的变分包含问题.作者给出了这个解存在的一个充分必要条件,并且证明出这个迭代序列刚好收敛到这个变分包含的解.     

5·12汶川地震后救援者心理创伤评估报告

为了解5.12汶川地震中参与救援者的创伤后应激障碍(PTSD)情况,采用事件影响量表(IES-R)对5.12汶川地震中550名救援者创伤后应激障碍的情况进行调查,结果表明有重度PTSD症状表现的救援者为9.0%;地震后部分救援者感到内疚、无助、压抑、无信心和生命无意义,救援者成为PTSD症状的易感人群.     

NaBrO_3/NaHSO_4·H_2O氧化体系简便高效地固态合成二芳基卡巴腙

以NaBrO3/NaHSO4.H2O为氧化体系在固态条件下,通过对二芳基卡巴肼的单侧脱氢快速高效合成了十种二芳基卡巴腙.该方法操作简便、产率高、无溶剂、对环境友好.     

千禧·龙城住宅小区规划设计

从开发优势条件、规划范围、规划原则、规划理念等方面阐述了千禧·龙城住宅小区的具体规划设计。     

18000 kN·m能级强夯在深厚人工填石地基处理中的应用

采用18 000 k N·m能级强夯对沿海深厚人工填石地基进行强夯处理,并通过动力触探试验、平板荷载试验和多道瞬态面波测试等方法,对处理后的地基进行测试和检验,结果表明处理效果良好.并在施工中对周边环境进行监测,得到了强夯振动影响的安全距离,为高能级强夯的普及推广应用提供了重要参考.     

An efficient non-iterative algorithm to estimate the apparent diffusion coefficient of water molecules in the magnetic resonance diffusion imaging experiments

Many studies have shown that the magnetic resonance signal decay with an extend range of diffusion weighting(b-factor)is a bi-exponential attenuation in the diffusion-weighted magnetic resonance imaging experiments in vivo.Based on this feature and the two-compartmental model,we propose a twice-linear-fitting(TLF)algorithm to estimate the apparent diffusion coefficient(ADC)of the water molecules instead of the commonly used iterative Levenberg–Marquardt(LM)method.The TLF algorithm consists of two liner fitting steps to estimate the fast and the slow apparent diffusion coefficients and their sizes,respectively.It is unnecessary to guess the initial values in the whole fitting process.The time consumption of the TLF algorithm is much less than that of the iterative LM method.Moreover,the TLF algorithm may avoid the extraneous solutions,which often deteriorates the results of the LM method.Compared with the iterative fitting method,the TLF algorithm is a reliable and timeefficient approach to estimate the ADC of water molecules in vivo in magnetic resonance diffusion-weighted imaging experiments.     

Genome editing and animal models

Transgenic technology allows a gene of interest to be introduced into the genome of a laboratory animal, and provides an extremely powerful tool to dissect the molecular mechanisms of disease. Transgenic mouse models made by microinjection of DNA into zygotic pro- nuclei in particular have been widely used by the genetics community for 30 years. However, it remains a rather crude approach： injected sequences randomly insert in multiple copies as concatamers, they can be mutagenic, and they have variable or silenced expression depending on the site of integration, a phenomenon called position effects. As a result, multiple lines are required in order to confirm appropriate transgene expression. This can be partially overcome by flanking transgenes with insulator sequences to protect the transgene from the influence of the sur- rounding regulatory elements. Large （〈300 kb） BAC- based transgenic vectors have also been shown to be more resistant to position effects. However, animals carrying extra copies of fairly large regions of the genome could have unpredictable phenotypes. The most effective method used to control for position effects is to target transgene insertion to specific genomic loci, the so-called targeted transgenesis; for instance, the fast, site-specific transgenic technology TargattTM. The purpose of this review is to provide an overview on the current existing methods for making targeted transgenic mouse models.     

S_2O_8~(2-)/CaO·Fe_2O_3光催化降解罗丹明B的研究

采用共沉淀法合成新型催化剂S2O28-/CaO.Fe2O3粉体。用红外光谱对其结构进行表征,并考察了助催化剂H2O2的用量、催化剂的投加量以及不同光源对罗丹明B溶液催化降解的影响。实验结果表明,所研制的S2O28-/CaO.Fe2O3粉体为固体超强酸,粒径处于纳米数量级,且其在紫外光区556 nm处有个紫外特征峰。在浸渍液(NH4)2S2O8浓度为0.5 mol/L、S2O28-/CaO.Fe2O3投加量为0.03g/25 mL、H2O2用量为1.00 mL/25 mL下,对浓度为0.6 g/L的罗丹明B溶液在自然光下静置1 h,其降解率可达99.2%。同时还初步探讨了催化降解过程中物理现象与化学性质分析、酸中心的形成机理及催化剂失活的可能原因。     

采用软化学法制备WO3和其锂化物及其结构稳定性的研究

通过两种方法合成了六方形和单斜氧化钨的水化物WO3·yH2O(y=0.50～1.20):(1) 用强酸(1～3 mol/L HCl) 将0.25 mol/L Li2WO4在100 ℃进行酸化; (2) 将1 mol/L Li2WO4置于高压反应釜中,控制pH为1.5,在100 ℃进行水热合成. 对于水热法,温度较高时(125～200℃),得到组分为LixWO3+x/2·yH2O(x=0.10～0.50,y=0.50～0.90)的锂化氧化钨. 合成产物的结构和组分与酸的浓度和后处理(加热、超声波)有关. 在350 ℃加热时六方形氧化钨完全转化为单斜氧化钨. 将温度在150 ℃以上时通过水热法合成的氧化钨前驱体进行超声波处理,产物的含锂量恒定为每单元0.18摩尔. 锂的引入有利于锂化氧化钨的结构和组分的稳定.     

开封旅游演艺《千回大宋》的发展路径研究

作为开封主要旅游演艺项目之一,《千回大宋》在短暂的市场繁荣后就渐显疲态.通过分析开封旅游演艺的总体发展及《千回大宋》的特色与不足,综合认为《千回大宋》未来的有效发展需要从以下几个方面着手:1)破除阴影屏蔽,重塑演艺形象; 2)凝练演艺内容,提升演艺品质; 3)丰富演出形式,提高观演效果; 4)提升服务意识,完善营销网络.