High efficiency D-A structured luminogen with aggregation-induced emission and mechanochromic characteristics

A novel luminogen, CZ2TPAN, with typical D-A architecture was obtained. It shows intramolecular charge transfer and aggregation-induced emission characteristics with high solid-state efficiency of 65.3%. Moreover, it exhibits reversible mechanochromic behavior between crystalline and amorphous states with remarkable emission color change from green (504 nm) to yellow (545nm).     

基于准时制的主生产计划方法

在当今的市场竞争中，能否及时供货和满足客户的要求关系到企业的信誉。为了提高企业的竞争能力，制造业都致力于采用日本的准时生产的策略。在前人研究的基础上，建立了适合于单件小批的主生产计划模型，这一模型有３个特点：（１）保证产品及时交货，也就是提前和滞后于交货期都要受到惩罚；（２）模型考虑了带有小批与单件并存的生产情况；（３）产品对能力的需求数据，考虑了分时段分布特点，并采用聚合算法从工艺路线和产品结构数据聚合而成。在对这一模型构造启发式算法的基础上，实现了主生产计划系统。该系统具有方便的人机界面，能够对由启发式算法产生的解进行修改。     

自适应有限元方法在线性椭圆方程的应用

本文完整给了在凸多边形域上关于Ｐｏｉｓｓｉｏｎ方程的先验及后验误差估计及其验误差估计的自适应有限元方法，从理论上证明了这种自动误差控制的方法是可靠的，有效的，实例所得数值结果是非常理想的。     

一类高新技术公司风险预测指标分析及评估方法

以管理顾问及咨询公司为背景,来探讨高新技术公司的风险.在分析可能产生的风险基础上,建立风险预测指标体系,并给出风险评估的方法.     

Fe(Ⅲ)-BPR-CPB-PVA显色反应的研究及应用

研究在溴化十六烷基吡啶(CPB)和聚乙烯醇(PVA)混和表面活性剂存在下，Fe(Ⅲ)与溴邻苯三酚红(BPR)的显色反应条件。结果表明，在pH值=4.0的醋酸醋酸钠缓冲溶液中，Fe(Ⅲ)与BPR生成的有色配合物的最大吸收波长为640 nm，表观摩尔吸光系数ε=5.33×104L*mol-1*cm-1，Fe(Ⅲ)浓度在0 μg/L～800 μg/L范围内符合比耳定律。据此拟定的分析方法用于水样、发样和某些化学试剂中微量铁的测定，获得满意结果。     

公路边坡防护设计原则及发展趋势探讨

公路建设的飞速发展,公路边坡防护也随着发展,在设计边坡的防护时,需要在讲求一定规范的情况下,掌握新的发展趋势,以便应对时代对公路边坡设计上提出的新要求.本文将对公路边坡防护设计的原则和发展趋势进行浅论.     

间断温血灌注心肌保护作用的实验研究

目的 研究间断温血灌注的心肌保护效果。方法 21只孤立灌注的犬心随机分为3组。Ⅰ组行持续温血灌注；Ⅱ组行间断温血灌注，间歇缺血期为10min，Ⅲ组行间断温血灌注，间歇缺血期为15min。结果 灌注2h,3h后，心肌超微结构改变，冠状静脉窦回流血血清肌酸磷酸激酶（CPK－MB）含量的变化，Ⅰ、Ⅱ2组组内、组间的无明显差异（P＞0．05），Ⅲ组组内与Ⅰ、Ⅱ组组间差异显著（P＜0．01）。结论 间断温血灌注、间歇缺血期时限适当，心肌没有明显累积性不良影响，与持续温血灌注具有相同的心肌保护效果。间歇缺血期最高时限，定为10min较安全。     

Knowledge discovery from communication network alarm databases

The technique of Knowlege Discovery in Databases (KDD) to learn valuable knowledge hidden in network alarm databases is introduced. To get such knowledge, we propose an efficient method based on sliding windows (named as Slidwin) to discover different episode rules from time squential alarm data. The experimental results show that given different thresholds parameters, large amount of different rules could be discovered quickly. Foundation item: Supported by the National 863 High-Tech Project (863-306-Z705-02) and National Natural Science Foundation of China (69896240) Biography: Wang Xi-miao (1973-), female, Ph. D. candidate. Research interests: network management and information processing.     

Synthesis of novel superhard materials under ultrahigh pressure

Superhard materials are solids whose Vickers hardness is beyond 40 GPa. They have wide applications in industry such as cutting and polishing tools, wear-resistant coatings. Most preparations of superhard materials are conducted under extreme pressure and temperature conditions, not only for scientific investigations, but also for the practical applications. In this paper, we would introduce the recent progress on the design and preparations of novel superhard materials, mainly on nanopolycrystalline diamond, B–C–N superhard solid solutions, and cubic-Si3N4/diamond nanocomposites prepared under ultrahigh pressure and high temperature（HPHT）, using multi-anvil apparatus based on the hinged-type cubic press. Bulk materials of all these superhard phases have been successfully synthesized and are systematically tested. We emphasize that ultra-HPHT method plays an important role in the scientific research and industrial production of superhard materials. It provides the driving forces for the light elements forming novel superhard phases as well as the way for sintering high-density nanosuperhard materials.     

Graphene meets biology

Graphene features a shining star in the material sciences since its discovery in 2004. Biomedical application of graphene-family materials has been driven recently. In this paper, we overviewed the cutting-edge research in the biomedical application of graphene-based biomaterials, such as bio-sensing and bio-imaging, drug/gene delivery and scaffold for tissue engineering. We emphasized on the effect of graphene substrates on cellular behaviors of adhesion, proliferation~ and differentiation. The develop- ment of three-dimensional scaffolds based on graphene- based nanomaterials and the potential of these constructs in tissue engineering are discussed. The perspectives and challenges are also addressed.