摘要：The development of novel porous materials have attracted significant attention owing to its possible application in several *** this study,we designed a novel covalent organic framework‐metal‐organic framework(COF‐MOF)material through an in‐situ ligand self‐assembly *** in‐situ modified ligands not only act as nucleation sites to form Ti‐MOF,but also as a channel to rapidly transfer photogenerated electrons without introducing additional chemical *** photocatalytic hydrogen production rate achieved over B‐CTF‐Ti‐MOF(1:1)was 1975μmol·g^(–1)·h^(–1) with an apparent quantum efficiency of 4.76%,which is 11.8 times higher than that of the pure CTF‐*** addition,compared with the sample prepared by separating the ligands(CTF‐1/Ti‐MOF),B‐CTF‐Ti‐MOF shows excellent activity and ***,a reasonable photocatalytic mechanism was proposed using the results of electrochemical tests and spectral *** study provides a universal method for the construction of highly efficient and stable COF/MOF materials with excellent properties.

摘要：基于第一性原理计算方法探讨了B添加对化合物偶MoSi_(2)/MoB氧化行为的影响。结果表明,初始氧化阶段MoSi_(2)/MoB两化合物界面处和MoB相具有较低的氧的吸附能、氧通过MoSi_(2)/MoB两化合物界面的扩散激活能较低,导致化合物表面更容易发生快速氧化,有利于保护性氧化膜的快速形成;当氧化过程达到稳定阶段时,化合物表面含有6%B(原子分数)的硼硅酸盐具有最低的氧扩散系数,具有更好的抗氧化性能。因而,精确控制B掺杂量是设计抗氧化的MoSi_(2)基化合物Mo-Si-B的有效策略。

摘要：汞是毒性较大的重金属,为了解土壤汞污染对蚯蚓抗氧化防御体系的影响,本文采用人工土壤法,研究了不同Hg暴露浓度水平下(1、2、4、8、16、24、32、50 mg/kg)赤子爱胜蚓(Eisenia foetida)的应激反应,分析了不同浓度Hg污染水平对蚯蚓体内3种抗氧化酶活性以及脂质过氧化最终产物丙二醛(MDA)含量的影响。结果表明,Hg暴露会对蚯蚓抗氧化防御系统产生较大影响。蚯蚓体内超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-PX)和过氧化氢酶(CAT)在不同浓度的Hg暴露水平下,随时间变化呈现出不同的阶段性应激反应。总体上看,Hg暴露环境对赤子爱胜蚓SOD和GSH-PX活性有一定的抑制作用,但对CAT活性的影响无明显规律。Hg暴露对蚯蚓体内MDA含量有一定影响,在32和50 mg/kg的较高浓度水平下,赤子爱胜蚓体内MDA含量明显增加,可能是汞胁迫造成了蚯蚓机体细胞的氧化损伤。

摘要：To develop novel sulfonylurea herbicides, a series of chlorsulfuron derivatives was designed and synthesized through introducing tetrahydrophthalimide substructure taken from protoporphyrinogen IX oxidase（PPO） inhibitors onto the critical 5-position of the classical benzene ring. The structures of title compounds were confirmed by infrared spectroscopy, ultraviolet spectroscopy, 1H and 13C NMR spectrometry, mass spectrometry and elemental analysis. In addition, the crystal structure of compound I1-5 was further determined by X-ray diffraction analysis. Bioassay results showed that individual compounds exhibited good herbicidal activities, especially compound I1-8, which displayed 100% inhibition rate against Echinochloa crusgalli at 150 g/ha（1 ha=104 m2） with the method of foliage spray in the pot experiment.

摘要：Three novel series of 5-substituted sulfonylurea derivatives were designed and synthesized via introducing a triazole or oxadiazole ring at the 5th position of the benzene ring in classical sulfonylurea herbicides. All the target compounds were confirmed by means of IH nuclear magnetic resonance（NMR）, 13C NMR and elemental analysis. The bioassay results show that the target compounds containing an oxadiazole ring at the 5th position display moderate to excellent herbicidal activities against Brassica campestris and Amaranthus retroflexus under soil treatment. Especially, compounds zdk20, zdk21 and zdk22 possess 98.6%, 96.5% and 94.5% inhibition rates, respectively, against Amaranthus retroflexus at a concentration of 75 g/ha（1 ha=1× 104 m2） under soil treatment, which approach to those of the commercial herbicide chlorsulfuron.

摘要：The sulfoximine group has been evaluated as a pharmacophore. Introducing the sulfoximine structure into medicinal compounds as exciting motifs has brought opportunities in drug discovery. In order to develop new ryanodine receptor （RyR） modulators, a series of phthalamides containing sulfoximine derivatives were designed, synthesized, and evaluated against oriental armyworm and diamondback moth for their insecticidal activities. These studies helped to elucidate the electronic and structural requirements around the sulfoximine motif for insecticidal activity. All new structures were synthesized and characterized by ^1H NMR, ^13C NMR, HRMS and bioassay and a preliminary structure-activity relationship （SAR） was discussed. The biological assessment indicated that most title compounds showed good to excellent larvicidal activities. Compounds la, le, and If gave excellent insecticidal activity against oriental armyworm, which showed 100% larvicidal activity at 0.5 mg/L. All compounds showed 100% larvicidal activity at 0.1 mg/L against diamondback moth. In particular, the larvicidal activities of le, If, and lh at 0.0001 mg/L were 50%, 20%, and 40%, respectively, reaching an activity as high as that of the commercial flubendiamide （40%, 0.0001mg/L）. Therefore, Ia, Ie, If and Ih could be considered as new lead structures for the development of new ryanodine receptor （RyR） modulators.

摘要：近年来,网络视频成为一种重要的新型消费内容,同时网络口碑对在线内容扩散的影响也日益深刻。本文考虑网络视频收费期内用户情绪效用产生的网络口碑对视频节目扩散过程的影响,运用数理分析方法,研究了网络视频运营商关于节目价格与广告投放量的最优决策问题,并分析了节目口碑属性、节目试看、节目体验质量和收费期等因素对最优决策结果的影响。研究发现,当付费用户与普通用户的视频体验质量差异足够大时,运营商将选择广告主导型策略(广告投放水平相对较高),反之则选择收费主导型策略(收费水平相对较高)。当节目口碑越好、试看时间越短、付费模式体验质量越低或免费模式体验质量越高时,运营商越倾向于选择收费主导型策略,相应的节目价格、广告投放量和运营商期望利润也将视条件发生不同变化。基于前述最优决策结果,运营商可进一步针对节目口碑属性对收费期进行优化。

摘要：对放射性废物处理中心蒸发系统进行简要介绍,针对传统工艺存在问题,以及无法满足新增核设施的放射性废液处理能力等问题,从二次蒸汽除沫方面对蒸发工艺核心设备及系统进行优化设计,如:降低蒸发器初级重力分离段雾沫夹带,内置泡罩塔并利用系统内净化水进行水洗,同时串联丝网除沫器进一步分离雾沫;采用带有高效聚结滤芯的净化器进行高精度净化。经理论验证,该优化设计可在保证废物最小化原则的基础上,有效提高放射性废液的净化能力和去污因子,同时简化系统设备及流程。

摘要：Two series of N-pyridylpyrazolecarboxamide derivatives were designed and synthesized by introducing D-alanine acid esters and D-serine acid esters into the skelecton of chlorantraniliprole. The obtained structures were characterized by 1H NMR, 13C NMR, elemental analysis and specific optical rotation analysis. Preliminary bioas-says indicated that some compounds displayed excellent insecticidal activities against Mythimna separate and Plutella xylostella in comparison with chlorantraniliprole. In particular, IIq showed excellent insecticidal activity against Plutella xylostella with a mortality rate of 90% at 0.01 mg·L^-1. A 3D-QSAR （CoMSIA） study was per- formed in order to disclose the insecticidal structure-activity relationship and indicate the future work. The CoMS1A study demonstrated that large substitutes and electron deficient groups at the 3-position of pyrazole ring are favora- ble, the same as a small group near the ester groups of amino acid.

摘要：定价作为服务系统价值因素的调控机制,在拥塞控制、收益管理和服务质量控制等领域有重要的应用.服务提供商设计定价策略使得系统性能在诱导的顾客行为下达到最优.排队模型是分析服务系统性能的重要模型.本文介绍了排队系统定价控制的基本要素,包括排队模型、顾客行为、性能指标以及定价策略类型,围绕静态定价策略、动态定价策略和优先级定价策略,详细综述了排队系统定价控制的研究现状,然后简要介绍了作者针对排队网络动态定价问题的最新研究进展,最后总结了该领域的研究现状、尚未解决的问题、当前的研究热点以及未来的发展方向.