二氧化碳加氢合成甲酸的热力学分析

用热力学的方法分析了二氧化碳加氢合成甲酸的反应.计算了温度、压力对反应的平衡转化率的影响,表明CO2的平衡转化率随着反应温度、压力的增大而增大.但即便在高压和较高的温度下,也很难实现CO2加H2向甲酸的高效转化.     

二氧化钛光催化及其在废水有机污染物处理中的应用展望

通过对二氧化钛光催化原理、制备方法、对有机污染物处理研究现状、影响二氧化钛光催化的因素、提高光催化效率方法、在污水处理中的应用及研究方向等六个方面综述 ,说明TiO2 光催化在废水有机污染物处理中有广阔的应用前景     

利用计算机进行扩散硅压阻器件零点的温度补偿

通过建立数学模型,对扩散硅力一电转换装置进行了温度补偿实验,达到了很好的效果,理论和实验有很高的实用价值。     

Zr（SO4）2／TiO2固体超强酸的结构表征

采用一步法制得Zr（SO4）2/TiO2型固体超强酸，用FT—IR，XRD及TG／DTA等技术对其结构进行了表征，并且通过乙酸丁酯酯化反应考察了其催化性能．结果显示：添加TiO2后，催化剂表面氧化物的晶型结构主要是锐钛矿型的TiO2，没有观察到Zr（SO4）2的晶型衍射峰，Zr（SO4）2以无定型形式存在．酯化结果得出：当Zr（SO4）2的质量分数为60％，焙烧温度为400℃时，该超强酸对乙酸丁酯的催化活性最高．     

液体CO2冷藏车的冷负荷计算及其实验研究

从液体 CO_2冷藏车的制冷原理出发,设计出了符合节能与环保要求的冷藏车厢,同时对厢体的冷负荷进行了计算,在此基础上进行了实验研究以验证厢体设计及其冷负荷计算的合理性。实验发现,液体 CO_2在单位时间内的喷液量对冷负荷的平衡起着至关重要的作用。实验结果还表明,冷藏车厢设计科学,结构合理,具有一定的实用价值和商机,它的推广将为我国冷藏运输业起到积极作用。     

Novel method for detection of anomalous structure characteristics of ID precision ultrathin monocrystalline silicon section cutting tool

The structure characteristics of ID precision ultrathin monocrystalline silicon section cutting machine-tool spindle with force-monitoring bearings functioning as force measuring sensors were detected with the new Hilbert theory based signal-wave envelope detection method, presented to replace the conventional hardware device in order to ensure that the signal is measured online with high fidelity. According to the probability of anomalous incidents in the cutting process, a mathematical recognition model has been designed and verified on an STC-22ID machine.     

Modeling and Simulation of Photoelectronic Lambda Bipolar Transistor

Based on the region model of lambda bipolar transistor （ LBT）, a dividing region theory model of PLBT is set up.simulated and verified. Firstly, the principal operations of different kinds of photoelectronic lambda bipolar transistor ,（ PLBT） are characterized by a simple circuit model. Through mathematical analysis of the equivalent circuit, the typical characteristics curve is divided into positive resistance, peak, negative resistance and cutoff regions. Secondly. by analyzing and simulating this model, the ratio of MOSFET width to channel length, threshold voltage and common emitter gain are discovered as the main structure parameters that determine the characteristic curves of PLBT. And peak region width, peak current value, negative resistance value and valley voltage value of PLBT can be changed conveniently according to the actual demands by modifying these parameters. Finally comparisons of the characteristics of the fabricated devices and the simulation results are made, which show that the analytical results are in agreement with the observed devices characteristics.     

Isolated Solid-State Packaging Technology of High-Temperature Pressure Sensor

Thehigh temperature pressuresensorhaswidespreadapplicationsinthefieldsofpetroleumlog ging,automonitor ,aerospace ,andsoon ,foritsfeaturesofhighworkingtemperature,smallbulkandhighsensi tivity ,whereaspackagingtechnologyisamainfactorwhichhaslimiteditsdevelopmentandapplicationforalongtime.Sensorpackagegenerallyadoptsnon isolatedpackageatpresent ,itisonlyapplicabletothatpressuremeasurementinwhichthegasorliquidiselectricalinsu latorandhasnocorrosiontothesensorchipandmetalelectrode ,andtherangeisalso…     

自制模拟工业SO2吸收实验装置的改进

从整体上分析了微型化SO2吸收实验装置的一些需要改进之处，从提高实验结果的重现性和准确性等多方面进行了阐述，最终实现了提高实验结果的准确性和重现性的目的，同时实现了保护教师和学生的身体健康、提高教学科研效果以及保护环境。     

14号元素的“自白”

硅元素的知识是高中化学必修1的内容,硅及其化合物在现代社会被广泛应用,具有重要的经济价值。文章以第一人称的视角,将硅及其化合物的知识以自白的形式娓娓道来,介绍了硅元素的化学性质、存在形式、发现过程、具体种类及用途等。