蓝色薄膜电致发光的新材料ZnO（S）：Ce^3＋的发光特性

介绍了新制备的TFEL发光材料ZnO(S)：Ce^3 ，测量了它的PL和EL特性，结果显示：这种材抖的TFEL为Ce^3 的发光，有较好的颜色组成(446nm，493nm)，可望用于监色TFEL.     

Neonatal seizures associated with cerebral lesions shown by magnetic resonance imaging

AIM: To determine the diagnostic potential of magnetic resonance imaging (MRI) in neonatal seizures; to elucidate the aetiology, timing, and prognosis of the cerebral lesions detected. METHODS: Thirty one term neonates with clinical seizures underwent ultrasonography between days 1-7 (mean 2.5 days) and a high field spin-echo MRI scan on days 1-30 (mean 8.1 days), both of which were repeated at 3 months of age. Routine investigation excluded, as far as possible, infection, haematological, and metabolic-toxic causes as causes of the neonatal seizures. RESULTS: Brain abnormality was demonstrated by MRI in 68% of infants and ultrasonographically in 10%. Diffuse brain lesions (present in 29%) were associated with high mortality (58%) and morbidity (42%), whatever the aetiology. In contrast to a better short term prognosis for neonates with focal lesions where no infants died, 33% had a handicap, and the rest were normal at a mean follow up age of 2 1/2 years. Cerebral lesions were presumed to have antepartum origin in 43% of cases. Seizure aetiology was considered to be hypoxic-ischaemic in 35%, haemorrhagic in 26%, metabolic disturbances and cerebral dysgenesis in 16% and unknown in 23%. CONCLUSIONS: MRI detected a remarkably high incidence of brain lesions in neonatal seizures. Almost half of these were of prenatal origin and pathogenesis may essentially be attributed to hypoxic and/or haemodynamic causes.     

State Legislators'' Perceptions of the Use of E-mail in Constituent Communication

The metaphor of "Frankenfood" rapidly spread into popular use at the end of the 1990s, to the extent that it was even added to the New Oxford Dictionary of Phrase and Fable , 2000 edition. The metaphor gained wide popularity at least partly because of the active campaigns of various NGOs on their Web pages. The metaphor was also widely used in more informal e-mail and newsgroups on the Web, and seemed to provide common ground for different discourses. In this article, I explore the way metaphors relate different discourses on the Internet. This approach may open up new ways of analyzing both the network structure on the Internet, and the substantial aspects of the debate within the network. I first follow the development of the metaphor of "Frankenfood" over time, and then I map the uses of the metaphor by various sites on the Web. The aim is to discuss the role of metaphors as tools of communication by combining diachronic analysis of the expanding network around the metaphor with the static snapshots of the main sites' textual structure.     

论闽浙高铁对沿线地区旅游发展的影响

作为一种新兴的交通方式,高铁对旅游业有着重大的影响。“高铁旅游时代”已不再是一个陌生的词汇。本文以闽浙地区的高铁为例,分析高铁的发展给沿线地区旅游业带来的资源、客源、服务、营销等方面影响,并在此基础上提出高铁沿线地区旅游发展的新措施,以促进区域旅游的进一步提高。最后,本文对区域旅游的发展前景进行了展望,提出了未来旅游发展的目标。     

General circular permutation layout

In thegeneral circular permutation layout problem there are two concentric circles,C _in andC _out. There are a set ofn inner terminals onC _in and a set ofn outer terminals onC _out: terminalsi onC _in and _i onC _out are to be connected by means of a wire, where 1 i n. All wires must be realized in the interior ofC _out. Each wire can intersectC _in at most once and at mostK wires, for a fixedK, can pass between two adjacent inner terminals. A linear-time algorithm for obtaining a planar homotopy (single-layer realization) of an arbitrary instance of the general circular permutation layout problem, forK 0, is proposed. Previously,K = 1 has been studied. In this paper the algorithm is also extended to a more general problem, in which the number of wires allowed to pass between each pair of adjacent terminals onC _in may be different from pair to pair.The work of R. D. Lou and M. Sarrafzadeh was supported in part by the National Science Foundation under Grants MIP-8709074 and MIP-8921540. C. S. Rim, K. Nakajima, and S. Masuda's work was supported in part by the National Science Foundation under Grants MIP-8451510 and CDR-8803012 (Engineering Research Centers Program), and a grant from AT&T.     

Synergistic effect of styrene and zinc dimethyldithiocarbamate on the properties of high melt strength polypropylene

High melt strength polypropylene was successfully prepared by a reactive extrusion method, in which pure polypropylene without any additives was used as a basic resin; trimethylolpropane triacrylate was used as a grafting monomer, and styrene and zinc dimethyldithiocarbamate (ZDMC) were used as trapping radicals. The synergistic effects of styrene and ZDMC on melt strength and melt flow rate of modified polypropylene were investigated. When the additions of styrene and ZDMC were 3.5 parts by weight per hundred parts of resin (phr) and 0.3 phr, respectively, the melt strength of modified polypropylene (PP5) was about 21 cN, which was much higher than that of modified polypropylene without styrene (PP0, 4.6 cN). Moreover, crystallization behavior and mechanical properties of modified polypropylene were also investigated. The results showed that the melt and crystallization temperatures of modified polypropylene with styrene were higher than those without styrene, and the size of crystal was smaller. Moreover, the mechanical properties of modified polypropylene were greatly improved in the presence of styrene. J. VINYL ADDIT. TECHNOL., 24:13–17, 2018. © 2015 Society of Plastics Engineers     

Flexible Broadband Image Sensors with SnS Quantum Dots/Zn2SnO4 Nanowires Hybrid Nanostructures

Broadband image sensors are widely studied and applied in many fields. However, developing high‐performance flexible broadband imaging is still a great challenge that needs to be overcome. This study demonstrates a flexible broadband image sensor with SnS quantum dots (QDs)/Zn₂SnO₄ (ZTO) nanowires (NWs) hybrid nanostructures as the sensing elements, which is prepared by decorating ZTO NWs with SnS QDs via a two‐step vapor deposition method. Compared with pristine ZTO NWs, the hybrid QDs/NWs exhibit much higher photoconductive gain and specific detectivity in UV region and extended photoresponse ranging from UV to NIR region. In addition, individual hybrid QDs/NW photodetector built on polyethylene terephthalate substrate shows an excellent flexibility, mechanical stability, folding endurance, and long‐term stability. Integrated into a 10 × 10 array, a flexible broadband image sensor is fabricated. Under bending states, the flexible image sensor can still identify clearly the target images composed of white light and red light, revealing the outstanding target identification ability. The superior performance of the devices indicates that the QDs/NWs hybrid nanostructures have a tremendous application potential in future flexible broadband imaging technology.     

Preparation and Characteristics of Nd:KGW Above-conversion Luminescent Material

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