曲轴箱窜气量检测仪的研制

介绍了车用压差式气体流量传感器的结构设计和电测电路，指出了传感器的使用范围，由实验测出了特性曲线．该仪器可检测车用发动机曲轴箱窜气量，适用于发动机不解体故障诊断．     

Application of Hot Press Sintering to Na2O-B2O3-SiO2 Gels Containing Quantum Dots for Lowering of Densification Temperature

Na₂O-B₂O₃-SiO₂ (NBS) gels containing a large amount of CdS quantum-dots (10 wt%) were densified using the hot press (HP) sintering method. By HP treatment, full-densification temperature could be lowered by about 40°C than that of the normal non-pressing (NP) heat treatment. Exciton absorption of CdS quantum-dots in HP-sample showed a large blue shift compared with that in the NP sample, and the size-distribution of CdS dots remained very sharp, with a mean particle diameter d = 3.66 nm and a standard deviation of = 0.72. HP pressure had a large effect on the reduction of sintering temperature and time, resulting in the suppression of the aggregation and growth of CdS quantum-dots in NBS glasses.     

数字喷墨印刷关键技术及其实现

经过20多年的完善与发展，喷墨技术已经成为大幅面广告印刷行业的主要印刷技术。随着图书按需印刷需求的快速扩张以及国家环保政策的迅速落地，喷墨印刷技术作为一项高效环保的数字化印刷技术，得到越来越高的关注，业内普遍认为喷墨印刷技术将是数字化印刷的必然发展趋势。然而与已经成熟的多Pass喷墨印刷设备不同，单Pass喷墨印刷设备在数据带宽、数据在线重构、高精度同步控制、喷嘴在线补偿等方面有着极高的技术要求。本文首先简要介绍了喷墨技术，然后针对单Pass喷墨印刷设备需要解决的技术问题提出了相应的解决方案。依据本文技术设计的单Pass书刊喷墨印刷机已经投放市场，并且获得了用户的普遍认可。     

Book Reviews

Room temperature glass containing copper nitrate was produced using the microemulsion-gel method. Ultraviolet-visible spectroscopy and x-ray diffraction spectra were used to demonstrate the presence of copper nitrate in the gel samples. The samples were examined using optical microscopy, with and without polarized filters, and scanning electron microscopy with energy dispersive x-ray analysis, before and after the extraction of the surfactant with an organic solvent. The results indicated that copper nitrate was present throughout the silicate network formed and was associated with the microemulsion components, i.e., the interstitial liquid, remaining in the bulk material.     

Toroid type high-pressure device: history and prospects

The Toroid type high-pressure device and its predecessor, the Chechevitsa (lentil) type high-pressure device, are known to be used efficiently for the synthesis of new materials in recent decades. It was through the Chechevitsa device the first ultradense modification of silica, ‘stishovite’, was obtained. Both devices were essential for the industrial production of superhard materials in the USSR and other socialist countries. In 1980s, almost half of the world synthetic diamond and c-BN products were manufactured by these devices. However, the application of the Toroid device for examining the structure and physical properties of highly compressed substances has been considerably less appreciated. Meanwhile, the device has some unique features that have made possible 35-years of an extensive investigation of physical properties of substances at pressures up to 150 kbar, including electron transport and thermodynamic properties, elastic characteristics, viscosity, thermo-conductivity and other physical properties. Also, the device has been widely employed for structural X-ray and neutron diffraction studies of many materials. But it is not until recently that the convenience of the Toroid device for physical studies has been fully recognized. Through this recognition, the Toroid type device is today becoming increasingly popular among the researchers in the field of high pressures around the world.     

Exploratory Analysis for Elemental Characterization of Biomass Residues From Biodiesel Production by Inductively Coupled Plasma Optical Emission Spectrometry

Edible and non-edible seeds with high oil content are used as the main raw material for biodiesel production. The residual biomass (press cake or oil cake) can be used as animal feed, to aggregate value to the biodiesel production cycle. In this work, a microwave-assisted-digestion procedure for elementary determination by inductively coupled plasma optical emission spectrometry (ICP OES) using dilute nitric acid was developed. Inter-laboratorial reference material was used to check the accuracy. A full factorial design in addition to exploratory analysis through principal component analysis (PCA) and hierarchical cluster analysis (HCA) were used to classify the samples: press cakes from castor (Ricinus communis), jatropha (Jatropha curcas), radish (Raphanus sativus), sunflower (Heliantus annus), and coffee (Coffe arabica), according to their similarities.     

基于铰链式六面顶压机的二级6-8模超高压大腔体内置加热元件的设计与温度标定

 首次报道了一种新型的基于铰链式六面顶压机的二级6-8模大腔体静高压装置的内置加热元件的设计与温度标定。此加热组装结构简单,升温快,保温效果好,并有效地解决了国外基于两面顶压机构架下的二级6-8模内加热组装中热电偶在施加压力时易断的问题。以低成本的碳管为加热元件,采用直接和间接两种加热方式,用双铂铑（Pt6%Rh-Pt30%Rt）B型热电偶进行温度测量,并根据实验过程中加热功率与腔内实际温度的关系,对不同压力下腔体内的温度进行了标定。实验结果表明：此加热系统的油压达到40 MPa（腔体压力约10 GPa）时,温度可以达到1 700 ℃以上;在油压为30 MPa、样品室温度为1 000 ℃时,保温时间可达2 h,甚至更长;实验中获得样品的直径可达3 mm,高度可达7 mm,实现了在高温超高压条件下大样品的制备,满足了实验对产生高温超高压条件的需要。     

A new family of low wear,low coefficient of friction polymer blend based on polytetrafluoroethylene and an aromatic thermosetting polyester

To improve the wear resistance of polytetrafluoroethylene (PTFE), a crosslinked aromatic thermosetting polyester (ATSP) has been blended directly with PTFE. Cured ATSP powder which was directly synthesized as a cured powder form was used for this application. Because of the similar processing temperature range of cured ATSP and PTFE, composites within the entire composition range were successfully prepared by blending these two powders using a hot press. Tribological pin‐on‐disk tests (composite pins sliding against gray cast iron disks) showed improvement on friction coefficient of all composites and much less wear than pure PTFE. The composites survived at contact pressures of 7 MPa, which is higher than either pure PTFE or pure ATSP could sustain. With an increase in the amount of ATSP in the composites, storage modulus, and glass transition temperature were higher, and the wear resistance was enhanced. SEM images helped provide explanations for the unusually low mean wear rates that were observed for these composite samples. Copyright © 2008 John Wiley & Sons, Ltd.     

精确测量慢魔角旋转条件下碳氢偶极谱

发展了精确测量二维固体魔角旋转条件下碳氢偶极谱的方法，用以分析固体高分子分子运动，并给出了全同立构聚丙烯的实验谱.     

足底压力统计变化规律测试与侦破技术

利用现场足迹特征,分析罪犯的性别、年龄、身高、体态、行走姿势等个人形体特点,常称为给罪犯“画像”。这一技术在侦破案件中起了一定作用。（１）研究人在常态下行走时留在地面上的平面足迹反映出压力的分布和变化规律,分析压力与年龄的相关性,从中研究出分析年龄的科学方法,提高分析年龄的准确率。（２）研究平面足迹压力与人的性别、身高、体态、行走姿势的相关性找出各自的科学分析方法。（３）从分析理论上全面加以提高,