DECODING A VCR CONTROLLER CODE

The VCR Plus+ is a remote control for programming video cassette recorders. It uses an encrypted 1 to 8 digit number that encodes the channel, start time, length, and day of the month of the television show to be recorded. This paper describes a procedure for decoding the 1 to 6 digit codes.     

Luminaries-level structure improvement of LEDs for heat dissipation enhancement under natural convection

Heat dissipation enhancement of LED luminaries is of great significance to the large-scale application of LED. Luminaries-level structure improvement by the method of boring through-hole is adopted to intensify heat dissipation. Furthermore, the natural convection heat transfer process of LED luminaries is simulated by computational fluid dynamics (CFD) model before and after the structural modification. As shown by computational results, boring through-hole is beneficial to develop bottom-to-top natural convection, eliminate local circumfluence, and finally form better flow pattern. Analysis based on field synergy principle shows that boring through-hole across LED luminaries improves the synergy between flow field and temperature field, and effectively decreases the thermal resistance of luminaries-level heat dissipation structure. Under the same computational conditions, by luminaries-level structure improvement the highest temperature of heat sink is decreased by about 8°C and the average heat transfer coefficient is increased by 45.8%.     

To boldly go: an occam-π mission to engineer emergence

Future systems will be too complex to design and implement explicitly. Instead, we will have to learn to engineer complex behaviours indirectly: through the discovery and application of local rules of behaviour, applied to simple process components, from which desired behaviours predictably emerge through dynamic interactions between massive numbers of instances. This paper describes a process-oriented architecture for fine-grained concurrent systems that enables experiments with such indirect engineering. Examples are presented showing the differing complex behaviours that can arise from minor (non-linear) adjustments to low-level parameters, the difficulties in suppressing the emergence of unwanted (bad) behaviour, the unexpected relationships between apparently unrelated physical phenomena (shown up by their separate emergence from the same primordial process swamp) and the ability to explore and engineer completely new physics (such as force fields) by their emergence from low-level process interactions whose mechanisms can only be imagined, but not built, at the current time.     

中线平移互交视线测设法在斜交桥梁定位的应用

以福建某高速公路尤溪段源湖中桥为例,阐述了中线平移互交视线测设法在斜交桥梁墩台定位的应用情况,实践证明该方法能很好地解决斜交桥梁墩台定位的问题。     

Study on photocatalysis of TiO 2 nanotubes prepared by methanol-thermal synthesis at low temperature

TiO₂ nanotubes were synthesized by the solvothermal process at low temperature in a highly alkaline water–methanol mixed solution. Their characteristics were identified by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), specific surface area (BET), Fourier transform infrared spectroscopy (FTIR) and UV–Vis absorption spectroscopy. The as-prepared samples were tested by the photodegradation reaction of methylene blue (MB) dye under visible-light irradiation. The ratios of methanol and water, as well as calcination temperature, affected the morphology, nanostructure and photocatalytic performance. The methanol solvent plays an important role in improving crystallization of the anatase phase, which affects the photocatalytic reaction. Titanate nanotubes were synthesized in methanol–water volume ratios of 10:90, 20:80 and 30:70 which still had high absorbability. Titania nanotubes formed at a calcination temperature of 300 °C using methanol–water volume ratio of 30:70 showed highest photocatalytic performance, much higher than that using water solvent and TiO₂–P25 powder.     

NUMERICAL COMPUTATION OF FILM BOILING INCLUDING CONJUGATE HEAT TRANSFER

This article presents a numerical method and simulations of film boiling including conjugate heat transfer. A volume-of-fluid (VOF) interface tracking method is augmented with a mass transfer model and a model for surface tension. The bulk fluids are viscous, conducting, and incompressible. We explore film boiling on a horizontal surface and we consider the effect of the energy exchange between a solid wall and the boiling fluid during saturated horizontal film boiling.     

中压区域补偿型动态电压调节器设计

对适用于10kV配电网区域电压跌落治理的动态电压恢复器进行了设计,给出了基于级联H桥的主电路、取电装置、无变压器耦合电路的设计方法,并针对中性点不接地配网系统中电压跌落的特点,提出了一种仅需补偿电压跌落相电压即可恢复负载侧线电压的参考值计算方法。最后,基于PSCAD搭建了仿真模型,分析了不同故障类型下动态电压调节器(DVR)的补偿效果以及取电装置对系统的影响,通过实验验证了DVR硬件设计与参考电压计算方法的正确性和有效性。     

电视机的虚拟开发与设计（一）--电子元器件的虚拟开发设计

本文主要应用虚拟技术对电视机进行开发,在设计和开发过程中,主要对电视机的基本结构如电视机外壳、电子元器件、连接导线和PCB等结构要素进行交互操作、场景开发和动画控制,给出了详细的开发过程和开发效果图,对于电视机的开发具有一定的借鉴作用。     

含亚胺结构片段的喹唑啉酮衍生物的合成与抗肿瘤活性研究

设计并合成了一系列含亚胺结构片段的新型喹唑啉酮衍生物,最终的15个化合物结构经¹HNMR、¹³CNMR和HR-MS确证,并评价了它们对野生型表皮生长因子受体酪氨酸激酶(EGFR^wt)和两种人癌细胞株(A549、HepG2)的体外抗肿瘤活性。结果表明,部分化合物具有良好的活性,特别是化合物(E)-2-((4-((3,4-二氟亚苄基)氨基)苯氧基)甲基)-3-甲基喹唑啉-4(3 H)-酮对EGFR^wt激酶的IC₅₀达到0.037μmol/L,对A549和HepG2两种肿瘤细胞的IC₅₀值优于吉非替尼。