模糊控制技术在浴室供水系统改造中的应用

介绍了在对学生浴室供水系统改造时，利用模糊控制技术对输出水温进行自动控制，使淋浴头的出水水温恒定，明显的改善了洗浴条件，同时也节约了大量的洗浴用水。     

甘蔗对磷肥的效应

[本文曾于1974年在南菲德班(D-urban)举行的第十五届国际甘蔗糖业技术会议上介绍,并编入论文集中]前言土壤中的磷是以多种形式和化合物的状态存在的,其全磷含量固然不同,而有效磷含量变异更大,因此,不同种类磷肥的效果是要考虑到(要联想到)所施下的土壤的化学性质的。施用磷肥无效往往是与土壤固定磷的能力     

选煤厂浮选工艺效果评定方法

在分析了国内外浮选工艺评定方法的基础上,提山了用精煤数量指标η_(i?)评价不同选煤厂之间?选工艺效果,用浮选完善指标η_(w?)评价同一选煤厂不同浮选工艺条件时的浮选工艺效果。     

墨西哥湾格朗岛95区块气田的勘探史

格朗岛95区块气田位于路易斯安那岸外40英里处,水深200英尺。第一阶段的地震勘探工作由美孚石油公司于1972年完成。在据认为与油气存在有关的地震剖面上观察到高振幅同相轴。重新处理过的地震测线资料显示出,在原认为是油-气接触面和油-水接触面的两个可疑的平点附近,振幅有些变化。通过认真检查原始地震资料发现,其中一个平点同相轴是由断层下面的噪声和失真引起的。后来的地震模拟研究使该气田的勘探和开发获得成功。     

Half-time image reconstruction in thermoacoustic tomography

Thermoacoustic tomography (TAT) is an emerging imaging technique with great potential for a wide range of biomedical imaging applications. In this paper, we propose and investigate reconstruction approaches for TAT that are based on the half-time reflectivity tomography paradigm. We reveal that half-time reconstruction approaches permit for the explicit control of statistically complementary information that can result in the optimal reduction of image variances. We also show that half-time reconstruction approaches can mitigate image artifacts due to heterogeneous acoustic properties of an object. Reconstructed images and numerical results produced from simulated and experimental TAT measurement data are employed to demonstrate these effects.     

Spatial-resolution enhancement in computed tomography

We propose an approach that combines an asymmetric fan-beam configuration and a new reconstruction algorithm to enhancing spatial resolution in computed tomography (CT). The asymmetric configuration can be achieved by changing the center of rotation (COR) from the conventional symmetric configuration. It does not, however, require new detectors and X-ray source nor alter the relative geometry between the detector and the X-ray source. By effectively reducing the distance of the COR to the X-ray source, the asymmetric configuration can increase the effective sampling density in projection data without reducing the size of the field of view (FOV). The proposed algorithm, on the other hand, can reconstruct images directly from data acquired with this asymmetric configuration. We performed numerical studies to demonstrate and validate the proposed acquisition/reconstruction approach. Results in these studies confirm that the proposed approach can lead to enhanced spatial resolution in reconstructed images. The proposed acquisition/reconstruction approach may find applications in micro-CT and industrial CT in which the CORs may be changed.     

Preparation, in vitro and in vivo evaluation of liposomal/niosomal gel delivery systems for clotrimazole

Clotrimazole, which is an imidazole derivative antifungal agent, was widely used for the treatment of mycotic infections of the genitourinary tract. To develop alternative formulation for the vaginal administration of clotrimazole to provide sustained and controlled release of appropriate drug for local vaginal therapy, liposomes/niosomes were evaluated as delivery vehicles. To optimize the preparation of liposomes/niosomes with regard to size and entrapment efficiency, multilamellar liposomes/niosomes containing drug were prepared by lipid hydration method. The prepared liposomes/niosomes were incorporated into 2% carbopol gel, and the systems were evaluated for drug stability in phosphate-buffered saline (pH 7.4) and simulated vaginal fluid at 37 +/- 1 degrees C. Further, the vesicle gel system was evaluated by antifungal activity and tolerability on tissue level in rat.     

Multipole-storage-assisted dissociation for the characterization of large proteins and simple protein mixtures by ESI-FTICR-MS

In Fourier transform ion cyclotron resonance mass spectrometry, collisionally activated dissociation (CAD) typically is accomplished within the analyzer ion cell. An alternative approach of multipole-storage-assisted dissociation (MSAD) has previously been demonstrated by inducing collisional fragmentation in the external multipole that is usually employed for ion accumulation. To explore the utility of MSAD for interrogating intact proteins and simple protein mixtures in a multiplexed manner, we have investigated the means of controlling the collisional energy and the fragmentation pattern for this experimental approach. With protein samples in the low micromolar concentration range, the two major experimental parameters affecting MSAD in the hexapole region were found to be the dc offset voltage and accumulation time. While low-energy MSAD of intact proteins yields fragment ions similar to sustained off resonance irradiation collision-activated dissociation (SORI-CAD), high-energy MSAD induces sequential fragmentation for intact proteins to yield a rich variety of singly charged ions in the m/z 600-1200 Da region. Each of the seven proteins (Mr range of 8.5-116 kDa) examined in this study exhibited their own characteristic MSAD fragmentation pattern, which could be used as a signature of the presence of a given protein, even in a mixture. In addition, any MSAD fragment can be isolated and dissociated further by SORI-CAD in an MS3-type experiment inside the FTICR analyzer cell. This presents a novel way to interrogate the identities of these fragment ions as well as obtain amino acid sequence tag information that can be used to identify proteins from mixtures.     

Facile scheme for fabricating solid-state nanostructures using e-beam lithography and solution precursors

We demonstrate a facile approach for site-specific fabrication of organic, inorganic, and hybrid solid-state nanostructures through a novel combination of electron-beam lithography (eBL) and spin coating of liquid and sol-gel precursors, termed soft eBL. By using eBL patterned resists as masks in combination with a low cost process such as spin coating, directed growth of nanostructures with controlled dimensions is achieved without the need for the costly and difficult process step of etching ceramics. The highly versatile nature of the scheme is highlighted through the fabrication of nanostructures of a variety of materials such as ferroelectric, optoelectronic, and conducting polymeric materials at different length scales and spatial densities on a multitude of substrates.