超声在废水处理中的应用

超声波处理废水是一项新兴的废水处理技术,具有操作简单方便、降解速度快等优点,在处理毒性高、难降解的有机废水应用表现出广阔的前景。     

功率超声在废水处理中的应用

采用不同强度和频率的超声波，对几种生物难降解的有毒污染物（苯胺，硝基苯）废水进行超声处理，实验表明，降解效果主要取决于超声波在反应液中的声强及处理时间，同时，若辅以通氧气或加入催化剂，处理效果更好，这就为设计相应的超声废水处理设备提供了实验基础。     

染料探针在生物分析中的应用研究进展

评述近年来染料探针在生物分析中用于蛋白质的定量测定及蛋白质、核酸与小分子相互作用等方面的研究进展。列出了一些重要体系以及分析特征。     

柔性超声换能器在生物医学中的研究进展*

传统超声换能器存在体积大、表面刚性的缺点,无法用于人体复杂皮肤表面和可穿戴器件的设计。为使换能器具有灵活、体积小,满足可穿戴的特点,将其压电元件、电极和封装等各组成部分重组为柔性换能器。相比于传统换能器,它有两个优点：首先,不需要专业人员操作,可实现持续性的超声监控或治疗。其次,通过更全面的皮肤表面覆盖,扩大声场范围。在超声诊断方面,改善声信号采集,获得更全面的检测信息;在超声治疗方面,增加声能量沉积,提高疗效。柔性换能器使超声医疗应用场景多元化,可实现连续超声诊断或超声治疗。该文首先概述了其在设计和加工方面的最新进展,然后重点介绍了其在诊断和治疗方面的应用,最后讨论了这一领域所面临的挑战并对发展前景进行展望。     

超声法测速在气垫导轨实验中的应用

用超声脉冲回波法对滑块位置与速度进行连续测量。     

超声生物物理学

一、引言近几十年来,由于物理学和生命科学的迅速发展和相互渗透,一门年轻而具有强大生命力的边缘学科──生物物理学已经形成．在国外一些著名大学中已创办起生物物理学系或开设生物物理学专业［１］．超声生物物理学是生物物理学的一个重要组成部分．七十年代以来,医学超声取得了异乎寻常的进展［２］,特别是对人体脏器实时超声断层显象技术的发展和普及以及超声计算机辅助断层显象（即超声ＣＴ）技术的崛起,使得人们对?...     

微波消解-原子吸收光谱法间接测定生物样品中的氯离子

微波消解样品,在中性介质中加入硝酸银,氯离子与银离子生成氯化银沉淀,采用火焰原子吸收光谱法测定溶液中剩余银的量,间接测出氯离子浓度。方法检出限为2.0μg/mL,回收率为96.0%—106.6%,相对标准偏差（RSD）为0.32%—2.72%。该方法具有良好的准确度和精密度。方法简便、快速,是测定生物样品中氯离子比较好的方法。     

高光谱遥感技术在生物多样性保护中的应用研究进展

当今世界物种的减少和栖息地的丧失日益严重,生物多样性保护已经成为最热门的话题之一。遥感这种通过非接触式收集信息的科学,及相应的估算生物多样性、建立物种多样性的关系模型和进行生物多样性指数制图等功能,已在生物多样性保护领域中得到了广泛应用。从遥感传感器和遥感技术两个方面论述了高光谱遥感技术在生物多样性保护中的应用进展,重点列举了光谱遥感在生物多样性保护中的成功应用实例。对生物多样性保护的发展具有一定的参考价值。     

共振瑞利散射法在抗生素类药物分析中的研究进展

对近6年来共振瑞利散射法在抗生素类药物分析中的研究与应用做了简要综述,主要从反应体系,线性范围,检出限等方面对几大类药物的研究现状进行了介绍.     

水处理用声化学反应器研究进展

介绍了在水处理中采用的液哨式、清洗槽式、变幅杆式、杯式、平行板、管型等声化学反应器的研究进展和应用现状。指出要在实际水处理工程中采用超声技术，必须尽快开展高效、大批量处理或流水式连续运行的声学反应器的基础研究与应用开发。     

Recent advances on a DGTD method for time-domain electromagnetics

During the last ten years, the discontinuous Galerkin time-domain (DGTD) method has progressively emerged as a viable alternative to well established finite-difference time-domain (FDTD) and finite-element time-domain (FETD) methods for the numerical simulation of electromagnetic wave propagation problems in the time-domain. In this paper, we review the historical development of the DGTD method and emphasize its recent adoption by the nanophotonic research community. In addition, we discuss about some of our recent efforts aiming at improving the accuracy, flexibility and efficiency of a non-dissipative order DGTD method, and also report on some preliminary works towards its extension to the numerical treatment of physical models and problems that are relevant to nanophotonics.     

Recent advances in optodynamics

The term optodynamics has been introduced to describe a wide range of optically induced dynamic phenomena, which play an important role in laser–material processes as well as in laser-assisted medical applications. In view of laser material processing, a laser beam is not only considered as a tool, but also as a generator of information about the material’s transformation. The information is retained and conveyed by different kinds of optically induced mechanical motions, such as shock, acoustic and ultrasound waves, and cavitation bubbles. Special emphasis is given to the recent investigations of linear momentum transformation during the laser–material interaction and to the on-line monitoring of laser material processing.     

Recent advances in terahertz imaging

We review recent progress in the field of terahertz “T-ray” imaging. This relatively new imaging technique, based on terahertz time-domain spectroscopy, has the potential to be the first portable far-infrared imaging spectrometer. We give several examples which illustrate the possible applications of this technology, using both the amplitude and phase information contained in the THz waveforms. We describe the latest results in tomographic imaging, in which waveforms reflected from an object can be used to form a three-dimensional representation. Advanced signal processing tools are exploited for the purposes of extracting tomographic results, including spectroscopic information about each reflecting layer of a sample. We also describe the application of optical near-field techniques to the THz imaging system. Substantial improvements in the spatial resolution are demonstrated. Received: 29 January 1999 / Published online: 7 April 1999     

Recent advances in optical bistability

In this paper, recent advances in optical bistability and gating of semiconductors will be reviewed. Nonlinear mechanisms responsible for switching will be described. The advantages of nonlinear etalons for massive parallelism and current problems in performing such operations will be mentioned.     

Recent advances in molecular diversity

Molecular Diversity -     

光学密码术最新进展

在总结基于耦合半导体激光器光学混沌的产生和同步原理的基础上,讨论了其在光学密码术中的应用,提出了基于混沌载波的数字加密基本方案和改进方案,包括混沌掩膜法（CM）和混沌键控法（CSK）。最后,给出了混沌加密传输技术的一些最新进展,如相位调制（PM）、自由空间光学链路（FSOL）、多激光器和多用户方案等。