湿法锑白的晶型转变

研究了湿法锑白的白度和光敏性。通过真空干燥试验研究，对样品进次了Ｘ射线衍射定量分析，首次发现真空干燥可以使湿法锑白发生晶型转变，由斜方晶体转变为立方晶体。在适宜条件下，其转变率可达９９．６％。转变为立方晶的锑白白度高且见光稳定，光敏性消失。     

A method to fabricate high-aspect-ratio microstructures using PMMA photoresist

Microsystem Technologies - Fabrications of high-aspect-ratio microstructures (HARMS) using negative photoresist have been studied a lot by researchers recently, but the removal of the resist is...     

Exploring young students’ learning experiences with the iPad: a comparative study in Hong Kong international primary schools

In recent years, the popularity and capabilities of the iPad^®, Apple’s tablet computer, have prompted educational technology advocates and policy makers to evaluate its potential in classrooms. However, there have been few studies examining the tangible user interface (TUI, in which the user manipulates the touchscreen of the device with their fingers), one of the most significant features of the iPad in comparison to previous mobile devices. Therefore, in this paper, the research team examined this interface specifically for its potential in terms of usability with input interaction for young learners. A case study was conducted at three international schools in Hong Kong to explore the impact of the iPad’s TUI on the student learning experience. A mixed-method approach was taken, and 13 observations and 10 interviews were conducted to collect data. With statistical analyses, the amount of students seeking learning support behavior (ASSLS) at the schools employing iPads was compared with that at the school using traditional laptops. Evidence emerged to support the assumption that the TUI on the iPad may contribute to reducing the ASSLS as well as enhancing student engagement and collaboration in class. Implications of the findings in terms of usability, engagement, interaction, practice, and future research are discussed.     

Fabrication of micro pore optics with smooth sidewall using X-ray lithography

Micro pore optics (MPO) as an X-ray imaging system is perfectly suited for the applications in space telescopes due to its light-weight and high-resolution properties. We report the fabrication of MPO samples by LIGA process focusing on its sidewall surface used as mirrors for X-ray reflection. An intermediate mask is fabricated and used to obtain the working mask in order to avoid the UV exposure to a very thick photo resist layer. Around 400 μm-thick nickel MPO plate is obtained with the aspect ratio of the square pore and sidewall of 8 and 32, respectively. The root mean square roughness of the sidewall surface is below 10 nm in a 5 × 5 μm² region. Some striations are found on the sidewall surface originating from the jagged edge of the chromium coating on the UV mask.     

钢帘线生产技术和检测技术的新发展

９０年代以来，钢帘线生产技术有了长足进步，检测技术也随之发展。钢帘线新结构、新品种层出不穷，刚度和强度大大提高，超高强度钢帘线单丝强度达３９００ＭＰａ；自动化水平和生产效率进一步提高，交流变频和ＰＬＣ技术已普遍应用，自动更换工字轮的水箱拉丝机已相当完善，热处理电镀生产线的ＤＶ值普遍提高到６０～７０，甚至更高；生产规模进一步扩大，万吨级以下的钢帘线厂难以生存。新版本的《轮胎钢帘线国际统一测试方法》中新增了有关钢帘线的术语、平直度、伸长率、弹性、镀层质量及成分等测试项目和方法。     

MDC100-65-315磁力传动泵设计和应用

介绍了MDC100-65-315无泄漏磁力传动泵在轻介质、小汽蚀余量条件下的设计，给出了磁力传动泵在1-丁烯装置上的工业应用实例。     

新型隧道LED灯照明系统无级调光控制方式

针对近年来逐渐进入公路隧道照明的LED灯各种调光控制的调光范围、调光分级、电源效率、信号传输性能等影响因素进行对比分析的基础上,提出了采用DC0～5 V模拟电压信号传输的模拟信号控制电流平均值模式的亮度控制的新型隧道LED灯的调光控制方式,具有调光范围宽、电源效率高、信号传输性能好等特点.     

Controlled Growth of High‐Quality ZnO‐Based Films and Fabrication of Visible‐Blind and Solar‐Blind Ultra‐Violet Detectors

ZnO is a wide‐bandgap (3.37 eV at room temperature) oxide semiconductor that is attractive for its great potential in short‐wavelength optoelectronic devices, in which high quality films and heterostructures are essential for high performance. In this study, controlled growth of ZnO‐based thin films and heterostructures by molecular beam epitaxy (MBE) is demonstrated on different substrates with emphasis on interface engineering. It is revealed that ultrathin AlN or MgO interfacial layers play a key role in establishing structural and chemical compatibility between ZnO and substrates. Furthermore, a quasi‐homo buffer is introduced prior to growth of a wurtzite MgZnO epilayer to suppress the phase segregation of rock‐salt MgO, achieving wide‐range bandgap tuning from 3.3 to 4.55 eV. Finally, a visible‐blind UV detector exploiting a double heterojunction of n‐ZnO/insulator‐MgO/p‐Si and a solar‐blind UV detector using MgZnO as an active layer are fabricated by using the growth techniques discussed here.     

膜分离技术在中国西部省区苦咸水淡化工程中的应用

通过典型水点水质资料介绍 ,阐述中国西部陕西、甘肃、宁夏、青海、新疆五省区苦咸水理化特征 ,通过不同技术淡化苦咸水的工程实例 ,说明膜分离技术中反渗透是一种合理有效的苦咸水淡化技术。     

PHASE EQUILIBRIUM OF SBCL_3-HCL-H_2O SYSTEM

ＰＨＡＳＥＥＱＵＩＬＩＢＲＩＵＭＯＦＳｂＣｌ３－ＨＣｌ－Ｈ２ＯＳＹＳＴＥＭＤｕａｎ，Ｘｕｅｃｈｅｎ；Ｚｈａｎｇ，Ｄｕｏｍｏ；Ｚｈａｏ，Ｔｉａｎｃｈｏｎｇ（ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒｓｉｔｙｏｆＴｅｃｈｎｏｌｏｇｙ，Ｃｈａｎｇｓｈａ４１００８...