Neural network’s selection of color in UI design of social software

Neural Computing and Applications - In recent years, the design of social software UI has become a design research focus in the field of design. Color affects many factors in UI design. However,...     

6,7-二氨基-2-(2′,4′-二甲基)苯基-1H-苯并[de]异喹啉-1,3(2H)-二酮的合成

苊经发烟硝酸硝化，稀硝酸氧化得到６，７－二硝基－１Ｈ，３Ｈ－萘并［１，８－ｃｄ］吡喃－１，３－二酮，它与２，４－二甲基苯胺缩合后用氯化亚锡还原得到６，７－二氨基－２－（２′，４′－二甲基）苯基－１Ｈ－苯并［ｄｅ］异喹啉－１，３（２Ｈ）－二酮。与６－氨基－２－（２′，４′－二甲基）苯基－１Ｈ－苯并［ｄｅ］异喹啉－１，３（２Ｈ）－二酮（Ｃ．Ｉ．溶剂黄４４，或Ｃ．Ｉ．分散黄１１）相比，其在ＤＭＦ中的最大吸收波长红移了１７．６ｎｍ，最大荧光波长蓝移了４２．７ｎｍ，荧光量子产率有所增大。     

Binding materials of dehydrated phases of waste hardened cement paste and pozzolanic admixture

Fly ash (FA) and ground granulated blast-furnace slag (GGBFS) were added to improve the performances of regenerated binding materials (RBM) which refer to dehydrated phases with rebinding ability of waste hardened cement paste. Flowability tests, compressive strength tests, SEM, TG-DSC, and non-evaporable water content tests were employed to study the performances of the combined binding materials and the interactions between RBM, FA, and GGBFS. Results show that adding FA or GGBFS can improve the workability of RBM paste, and GGBFS has positive effects on strength of RBM. Pozzolanic reactions happen between RBM, FA, and GGBFS. And the activation effect of RBM to FA and GGBFS is superior to that of P.O grade-32.5 cement, especially at earlier ages, because of the high reactive f-CaO existing in RBM. On the advantages of the synergetic effects of RBM and pozzolanic admixtures such as FA and GGBFS, new combined binding materials can be prepared by blending them together. Funded by the National Science Foundation of China(No. 50508034)     

局部平均显著梯度保边滤波算法

针对传统平均保边滤波算法中存在的光晕伪影现象,提出一种显著图局部平均梯度的保边滤波算法.利用显著图像边缘对比度突出的特点,简化边缘区域和非边缘区域间的阈值设定工作,并根据显著图的平均梯度自适应的平滑图像中的细节和噪声部分,同时保持边缘清晰.实验结果表明,显著图局部平均梯度的保边滤波算法利用显著特性有效地避免了传统平均滤波算法中的光晕伪影现象.相对于传统平均滤波算法,在降噪、多尺度增强以及HDR方面都有较好的表现.     

社会支持理论视角下的大学新生适应性教育

在社会支持理论视角下,大学新生的适应性教育是一项系统工程,不仅包括物质方面的帮助和硬件配备,更重要的还有精神方面的支持和文化影响.本文从实践出发,认为学生管理部门可以重点从情感、信息、物质、行为等四个方面提供支持,帮助新生尽快融入大学生活,顺利完成中学生向大学生的过渡.     

Event-triggered control for stochastic systems with multiple delays

This paper investigates the stabilization problem for continuous-time stochastic systems with multiple delays under continuous event-triggered mechanisms, of which both static case and dynamic case are considered individually. In order to avoid zeno phenomenon in every sample path, a suspension time after each successful execution is forced for our event-triggered mechanisms, resulting in intermittent detection of system states. Under such control strategy, we deduce mean square exponential stability of stochastic systems with multiple delays by means of Hanalay-type inequality and obtain a delay-dependent-based and less-conservative stabilization criterion without involving the upper bound of time delays. Besides, a co-design procedure is proposed for linear controller and event-triggered mechanisms. In the end, an illustrative example is presented to show effectiveness of the proposed co-design procedure and contrasts the system performance under static and dynamic event-triggered mechanisms.     

改善误码性能的索引调制正交频分复用混合映射方案

为进一步提升索引调制正交频分复用(OFDM-IM)系统在高信噪比(SNR)条件下的误比特率(BER),该文提出一种混合映射方案。该方案利用高信噪比时索引比特比数据比特错误率更低的特性,混合使用两种不同位数的索引比特分配策略,提高了索引比特的占比。相应地,将子载波激活模式(SAPs)分为超级SAPs和普通SAPs,相比于普通SAPs,超级SAPs对应的索引比特和数据比特分别增加1 bit和减少1 bit。将超级SAP对应的数据比特采用奇偶校验的方式补齐,然后映射为数据符号,提高了系统的分集度,增大了数据符号间的最小欧氏距离。仿真结果表明,相比于以往的映射方案,混合映射方案在误比特率为10–4时可取得1～3 dB的性能增益,有效改善索引调制OFDM系统的误码性能。     

5种药用植物挥发油对仓库害虫生物活性的研究

研究了香薷、鹤虱等５种药用植物挥发油对仓虫的生物活性作用。结果表明,香薷挥发油的作用最为明显,它（剂量０２μＬ／ｇ）及其粗分离１＃～５＃样品（剂量００５μＬ／ｇ）均有效地抑制了试虫卵、幼虫及成虫的生长发育,从而减少了试虫Ｆ１代种群的发生,其中粗分离１＃样品作用尤为突出。香薷挥发油１＃～５＃样品的主要化学成分为４,５,６,７,８,８ａ－六氢－８ａ－甲基－２［１Ｈ］－奥酮（５２６４％）、百里香酚（３０５％）和一未定成分（２１９２％）。     

Porous haydite used as waste water filter medium for lake sludge

Porous haydite used as waste filter medium was prepared by dreging lake sludge to help solve the treatment problem of sludge and realize its reclamation. Several calcination regimes were considered and their effects on the pore structure and the properties such as the strength, the density, the filtering ability and the phosphate absorption ability of the haydite were investigated. For the mixture of 60% lake sludge and 40% fly ash in this experiment, the calcination regime with a pre-calcination period at about 600 °C, a temperature keeping period at 1 200 °C and a moderate cooling rate are recommended to prepare haydite with reasonable pore structure and good performances for its usage as the waste water filter media.     

锌电积节能措施的研究现状

传统的湿法炼锌过程中，存在着电积能耗大的问题。本文系统综合了当前锌电积的节电措施，并对新型情性阳极材料及锌电积新工艺的研究现状进行了详细阐述。