N-取代唑类杀菌剂评述

一、N-取代唑类化合物概况我们从一个结构假设出发研究唑类化合物的杀菌活性,即:在活体内能形成正碳离子的化合物可能表现出生物活性。基于这一设想,N-三苯甲基咪唑是引人注目的化合物。正如在N-酰基咪唑中,π-体系中酰胺氮的孤电子对可提高酰碳的反应活性一样,使用N-三苯甲基咪唑也会有助于活性三苯甲基正离子的形成(图1)     

Analysis of accretion and deletion at boundaries in dynamic scenes

In dynamic scenes, the presence of object boundaries is often signaled by the appearance or disappearance of occluded surfaces over time. Such regions of surface accretion or deletion can be found using matching techniques similar to those used to determine optical flow in an image sequence. Regions in one frame that are not adequately matched by any region in previous frames correspond to accretion. Regions that have no matches in subsequent frames correspond to deletion. In either case, an occlusion boundary is present. Furthermore, by associating accretion or deletion regions with a surface on one side of a boundary, it is possible to determine which side of the boundary is being occluded. This association can be based purely on visual motion-the accretion or deletion region moves with the same image velocity as the remaining visible surface to which it is attached.     

Description of a polarized source of He i radiation for surface studies

A polarized radiation source has been designed and built for use in angular-resolved photoelectron spectroscopy on surfaces of single crystals under ultrahigh vacuum. The light from a discharge in helium is polarized by a triple reflection from a series of gold mirrors, producing a plane-polarized beam of He i radiation (21.22 eV) with a polarization of 80%. The plane of polarization can be rotated through more than 180 degrees without breaking vacuum. Details of the construction of the lamps are given, together with how it is integrated into the overall operation of the electron spectrometer. As an illustration of the lamp's potential, data are shown on the photoemission studies of the (110) and (111) faces of copper as a function of both the orientation angle of the crystal and the polarization vector. A brief discussion of the future development and possible uses of the lamp is included.     

江西南昌大学校园规划与景观设计

这是个中标并实施的方案，校园已建成80%，我们试图建设一个山水大学，其核心内容是：自然、自在、自律。其中南昌大学的大门十分别致，只是有人说造价多了一些。     

The status and evolution of plasma Wakefield particle accelerators

The status and evolution of the electron beam-driven Plasma Wakefield Acceleration scheme is described. In particular, the effects of the radial electric field of the wake on the drive beam such as multiple envelope oscillations, hosing instability and emission of betatron radiation are described. Using ultra-short electron bunches, high-density plasmas can be produced by field ionization by the electric field of the bunch itself. Wakes excited in such plasmas have accelerated electrons in the back of the drive beam to greater that 4 G eV in just 10 cm in experiments carried out at the Stanford Linear Accelerator Centre.     

Hydrologic modeling of pathogen fate and transport

A watershed-scale fate and transport model has been developed for Escherichia coli and several waterborne pathogens: Cryptosporidiumspp., Giardiaspp., Campylobacter spp, and E. coli O157:H7. The objectives were to determine the primary sources of pathogenic contamination in a watershed used for drinking water supply and to gain a greater understanding of the factors that most influence their survival and transport. To predict the levels of indicator bacteria and pathogens in surface water, an existing hydrologic model, WATFLOOD, was augmented for pathogen transport and tested on a watershed in Southwestern Ontario, Canada. The pathogen model considered transport as a result of overland flow, subsurface flow to tile drainage systems, and in-stream routing. The model predicted that most microorganisms entering the stream from land-based sources enter the stream from tile drainage systems rather than overland transport. Although the model predicted overland transport to be rare, when it occurred, it corresponded to the highest observed and modeled microbial concentrations. Furthermore, rapid increases in measured E. coli concentrations during storm events suggested that the resuspension of microorganisms from stream sediments may be of equal or greater importance than land-based sources of pathogens.     

江西师范大学理工科教学楼

这是个面积在6万平方以上的“巨无霸”型的综合性教学楼，是我们在用地紧张、师生人数较多的情况下，对功能整体打包的做法。经过多方请教、商议、教学楼终于建成。实际效果如何，还有待投入使用之后，在一定时间内得到切实的反馈意见才能得知。     

江中集团江纸项目概念性规划

江西纸业地块为原江西纸业股份有限公司厂址，位于南昌市八一大桥至赣江大桥的中间地段，属于赣江南岸。项目地块周边大多为一些低矮的老城区居民区。     

Preventing drowsiness accidents by an alertness maintenance device

The reported experiment investigated in an advanced driving simulator whether drivers' alertness can be maintained in drowsiness-inducing conditions by a special game-like system, a 'gamebox'. Drowsiness was assessed by self-rating and eye-closures. Mental effort was assessed by a subjective workload rating scale and by a physiological measure (the 0.1 Hz component of heart rate). Driving quality and safety were assessed by steering movements, time-to-line crossings, and by the occurrence of safety-related driving errors--solid line crossings, driving off-road incidents and accidents. When driving with the gamebox, drivers reported a lower degree of drowsiness and fewer instances of sleep episodes as compared to a control condition. Driving with the device resulted in fewer incidents and accidents, and these occurred later in the session. The quality of vehicle control deteriorated progressively over the course of the session, but less so in the gamebox condition. Hence, the results corroborate the notion that mental activity counteracts drowsiness in prolonged driving.