激光治疗儿童慢性分泌性中耳炎

采用CO2激光鼓膜切开术配合He-Ne激光理疗及CO2激光穴位照射治疗儿童慢性分泌性中耳炎80例140耳。140耳中治愈98，治愈率70％，好转34，好转率24％，总有效率为94％。激光治疗结果显示患者病程越短，声导抗越小治愈率越高，治疗效果与年龄无关。激光治疗本病与传统疗法比较具有疗效高，操作简便，患者痛苦小的优点，值得推广。     

用于生物微反应器pH在线监测光纤传感器研究

以生物微反应器中培养液pH在线监测为目标，研制出一种基于光度吸收原理的阵列光纤传感器。利用MEMS加工工艺，制备出传感器的阵列吸光池芯片，采用光学软件对吸光池进行优化设计，提高了传感器光传输效率，并通过CFD软件进行流体模拟，优化吸光池结构，降低了溶液死体积，缩短传感器响应时间。实验结果表明，所研究的传感器阵列检测灵敏度为0.83V/pH，响应速度快，可用于多个生物微反应器的pH在线监测。     

用于生物微反应器pH在线监测光纤传感器研究

以生物微反应器中培养液pH在线监测为目标,研制出一种基于光度吸收原理的阵列光纤传感器。利用MEMS加工工艺,制备出传感器的阵列吸光池芯片,采用光学软件对吸光池进行优化设计,提高了传感器光传输效率,并通过CFD软件进行流体模拟,优化吸光池结构,降低了溶液死体积,缩短传感器响应时间。实验结果表明,所研究的传感器阵列检测灵敏度为0.83V/pH,响应速度快,可用于多个生物微反应器的pH在线监测。     

Monitoring alcoholic fermentation by microwave dielectric spectroscopy.

The dielectric properties of water solutions of ethanol and sugar are investigated in the microwave region with the objective of setting up a method for the quality control of the fermentation process of alcoholic beverages. Alcoholic fermentation is the process by which carbohydrates, in particular sugar, are converted by the yeast into alcohol. During that process several other by-product compounds are produced, including a significant amount of carbon dioxide. The fermentation stage is of fundamental importance in the production of alcoholic beverages because some of the by-products' components have a considerable effect on the flavour, aroma, and other characteristic properties of the beverages. The on-line monitoring of the fermentation process can thus be very useful for controlling the timing and the development of the process in order to correct it earlier if deviations from "normality" occur. Dielectric spectroscopy is shown to be suitable for such a task, being able to discriminate between the initial water-sugar mixture and the final water-alcohol solution and making it possible to detect the production of carbon dioxide during fermentation. A case-study consisting of the monitoring of the primary fermentqtion of beer by dielectric spectroscopy is presented and discussed.     

局部糖皮质激素联合氦氖激光对急性化脓性中耳炎的疗效观察

目的:观察局部糖皮质激素联合氦氖激光治疗急性化脓性中耳炎的临床疗效。方法:将临床确诊的81例(81耳)急性化脓性中耳炎患者随机分成实验组和对照组。其中,实验组(40例)在给予左氧氟沙星滴耳液5ml+与布地奈德混悬液2ml混合均匀后滴耳的同时配合氦氖激光局部照射及全身抗生素治疗;对照组(41例)则仅给予左氧氟沙星滴耳液滴耳并联合氦氖激光局部照射及全身抗生素(同实验组)治疗。10日为一疗程,观察两组疗效。结果:1、实验组总有效率为95%,对照组总有效率为82.8%,两组间有统计学意义。2、两组治愈时间分别是7.6±1.5天和10.6±1.6天,经统计学分析,两组间有统计学意义(P0.05)。结论:局部糖皮质激素联合氦氖激光治疗急性化脓性中耳炎较常规治疗方法有更好的疗效,且可明显缩短病程。该治疗方法简单可行,疗效高,值得推广和应用。     

一种应用于润版液的低成本pH监控仪的研究

为了控制印刷润版液的酸碱度,提高印刷品的质量,设计了一种检测印刷润版液pH值的低成本的监控仪。详细介绍了整个系统的结构示意图、信号处理部分的硬件电路以及系统的校准过程。信号处理电路实现了对高阻抗的pH计的信号采集和处理;控制电路采用内部集成A/D的ATMega8单片机和数字式温度传感器DS18B20,满足了低成本的设计要求。     

香港空气污染成份的激光光声检测

我们建立了一套激光光声光谱检测装置,以可调谐CO激光器作为光源,成功地检测出香港几个典型交通道口空气中的若干污染气体成份:甲醛、乙醋醛、丙烯醛、乙烯、丙烯、甲苯等有毒气体。     

Transition metal-doped zinc chalcogenides: spectroscopy and laserdemonstration of a new class of gain media

The absorption and emission properties of transition metal (TM)-doped zinc chalcogenides have been investigated to understand their potential application as room-temperature, mid-infrared tunable laser media. Crystals of ZnS, ZnSe, and ZnTe, individually doped with Cr²⁺, Co²⁺, Ni²⁺, or Fe²⁺ have been evaluated. The absorption and emission properties are presented and discussed in terms of the energy levels from which they arise. The absorption spectra of the crystals studied exhibit strong bands between 1.4 and 2.0 μm which overlap with the output of strained-layer InGaAs diodes. The room-temperature emission spectra reveal wide-band emissions from 2-3 μm for Cr and from 2.8-4.0 μm for Co, Cr luminesces strongly at room temperature; Co exhibits significant losses from nonradiative decay at temperatures above 200 K, and Ni and Fe only luminesce at low temperatures, Cr²⁺ is estimated to have the highest quantum yield at room temperature among the media investigated with values of ~75-100%. Laser demonstrations of Cr:ZnS and Cr:ZnSe have been performed in a laser-pumped laser cavity with a Co:MgF₂ pump laser. The output of both lasers were determined to peak at wavelengths near 2.35 μm, and both lasers demonstrated a maximum slope efficiency of approximately 20%. Based on these initial results, the Cr²⁺ ion is predicted to be a highly favorable laser ion for the mid-IR when doped into the zinc chalcogenides; Co²⁺ may also serve usefully, but laser demonstrations yet remain to be performed     

Real‐Time Liquid Crystal pH Sensor for Monitoring Enzymatic Activities of Penicillinase

A liquid crystal (LC)‐based pH sensor for real‐time monitoring of changes in localized pH values near a solid surface is reported, along with its application for the detection of enzymatic activities. It is found that 4‐cyano‐4′‐pentylbiphenyl (5CB), when doped with 4′‐pentyl‐biphenyl‐4‐carboxylic acid (PBA), shows a bright‐to‐dark optical response to a very small change in pH (from 6.9 to 7.0). The pH‐driven optical response can be explained by using orientational transitions of 5CB induced by the protonation and deprotonation of PBA at the aqueous/LC interface. Because of its high pH sensitivity, the LC‐based sensor is further exploited for monitoring local pH changes resulting from enzymatic reactions. As a proof of concept, the hydrolysis of penicillin G by surface‐immobilized penicillinase is monitored using the system, even when the concentration of penicillin G is as low as 1 nM . This type of LC‐based sensor may find potential utilities in high‐throughput screening of enzyme substrates and enzyme inhibitors.     

Monitoring of TiSi2 formation on narrow polycrystallinesilicon lines using Raman spectroscopy

Micro-Raman spectroscopy is used to monitor titanium silicide (TiSi₂) formation on narrow undoped polycrystalline silicon lines. Linewidths varying from 1.0 μm down to 0.35 μm, with silicidation by rapid thermal anneal (RTA) temperature ranging between 780°C and 1020°C were analyzed. Phase changes between C49 and C54-TiSi₂ phases were clearly observed. Results demonstrate that analysis of the C54-TiSi₂ Raman peak intensity allowed fast and nondestructive estimation of the process window for low resistivity C54-TiSi₂ formation. Comparison with sheet resistivity measurements showed that micro-Raman scattering provides a complimentary means to electrical analysis for the study of TiSi₂ formation     

Community media in the context of European media policies

In the last three decades the emergence and development of community media across Europe has been mainly characterised by the political and social contexts at the national levels and, consequently, the sector is shaped by a range of opportunities and challenges that depend on the status of current policy, legislation and funding regimes in each country. Where at the pan-European level, since the 1970s, the Council of Europe has been supporting community media as a means for pluralism and diversity in the media, as well as a tool to promote social cohesion, in the European Union audiovisual and media policies, community media have been largely overlooked. In 2008 the Culture and Education Committee of the European Parliament promoted a report to support community media in the Union, signalling a new development pursuing to influence media policy discussion in the member states. This article aims to trace the contours of community media’s route across European media policies to assess how its practice has been shaped so far and discuss the emerging issues that are likely to influence its near future.     

A Multifunctional Pro‐Healing Zwitterionic Hydrogel for Simultaneous Optical Monitoring of pH and Glucose in Diabetic Wound Treatment

Diabetic ulcer is the most common kind of chronic wound worldwide. Though great efforts have been devoted, diabetic ulcer still remains as a challenge that requires constant monitoring and management. In this work, a multifunctional zwitterionic hydrogel is developed to simultaneously detect two fluctuant wound parameters, pH and glucose level, to monitor the diabetic wound status. A pH indicator dye (phenol red) and two glucose sensing enzymes, glucose oxidase (GOx) and horseradish peroxidase (HRP), are encapsulated in the anti‐biofouling and biocompatible zwitterionic poly‐carboxybetaine (PCB) hydrogel matrix. The visible images are collected by a smartphone and transformed into RGB signals to quantify the wound parameters. Results show that the activity and stability of both two enzymes are improved within PCB hydrogel, and the K_cat/K_m value of PCB‐HRP is ≈5.5 fold of free HRP in artificial wound exudate. This novel wound dressing can successfully monitor the pH range of 4–8 and glucose level of 0.1–10 × 10^?3 m . Meanwhile, it also provides a moist healing environment that can promote diabetic wound healing. This multifunctional wound dressing may open vistas in chronic wound management and guide the diabetes treatment in clinical applications.     

多发性骨髓瘤并胸腔积液

目的：以胸腔积液为首发症状的多发性骨髓瘤非常罕见，探讨诊断骨髓瘤细胞浸润胸膜的方法。方法：自然沉淀法寻找胸水中多发性骨髓瘤细胞。结果：胸水中找到了成堆的单克隆骨髓瘤细胞。结论；自然沉淀法寻找胸水中骨髓瘤细胞简便易行，是确诊多发性骨髓瘤细胞浸润胸膜的可靠证据，易于推广。     

传统媒体与新兴媒体融合在广播电台的应用

随着媒体技术的飞速发展,传统媒体与新兴媒体的融合方式也在不断地发生变化。以中央人民广播电台近期改造项目为例,从媒体融合的必要性、音频系统的发展、未来媒体融合发展趋势几个角度,对电台传统媒体与新兴媒体融合发展进行了分析,提出媒体之间的相互融合不仅仅是生产技术上的融合,更重要的是"用户"思维之间的融合。在电台新旧媒体融合发展的道路上,应当依托自身优势,丰富并完善多媒体的技术制作手段,不断创新思维,主动迎接媒体融合所带来的机遇和挑战。     

环境监测系统在调频广播监测中的应用

1 概述 随着交通的发展.客观上形成了一个庞大的汽车消费和广播听众市场,机动车辆的增加使需要广播提供车上移动信息的人群越来越庞大.为了满足广播发展和广大听众的需要,FM101.1江苏交通广播网主要以宁沪高速公路为主线,各地级城市覆盖为主,已经达到同步无缝隙的有效覆盖.     

新媒体时代计算机技术在传媒中的应用分析

随着我国相关科学技术的持续进步发展以及人民生活水平的提升,广播、电视、报纸等各种传统媒体也在逐渐地没落,而现阶段所出现的以计算机和网络技术作为主要载体的新媒体逐渐兴起,导致传媒行业受到了一定程度的冲击。另外,受到计算机技术影响的传媒行业也在逐渐地进行变革,文章就目前新媒体时代背景之下计算机技术在我国传媒行业当中的实际应用进行深入分析,就计算机技术的覆盖广、快捷、高效等方面的优点,对其应用进行剖析,从而推动我国传媒行业的不断进步和发展。     

IP监测在广播电视监测中的应用

本文概述了IP监测的创新性,分析了IP监测的技术构成和系统优点,并对IP监测未来的发展方向进行了评述。     

Characterisation of arbitrary media in fields

An obstacle in a field may be uniquely defined by a linear operator, provided that its constituent media are time-invariant, linear and passive. The properties, measurement and uses of this operator are discussed, and examples are given.