The Indoor Experiment Study on Pore Water Pressure Increment and Dissipation of Saturated Sand Caused by Blasting

An indoor experiment on explosive compaction of saturated sand has been done.The changes of pore water pressure during blasting are measured and the laws of pore water pressure increment and dissipation are analyzed.It indicates that the processes of increment and dissipation of pore water pressure have particularity along the depth and radial.At the same time,the development rule of liquefaction under explosive loading is also analyzed;these conclusions obtained in the experiment,may provide some useful references for the engineering design and the theoretic study of explosive compaction for water-saturated granular foundation.     

Mode-Superposition Method for Passive Energy Dissipation Structures

The methods of equivalent linearization of different energy dissipation devices are different in analyzing passive energy dissipation structure including different type of energy dissipation device by using of mode-superposition response spectrum method based on equivalent linearization, which results in the differences in computing accuracy and cost in dynamic analysis. For structures separately installed different energy dissipation devices, authors utilize relatively uncoupled mode-superposition method and complex mode-superposition method for contrast analysis, and probe into the suitability of the two methods in the dynamic analysis of passive energy dissipation structure. Numerical results show that complex mode-superposition method could be better for structure with viscous dampers in order to guarantee accuracy, and relatively uncoupled mode-superposition method is recommended for structure with viscoelastic, metallic or frictional ones.     

Study on the Materials Used for Making Models of Sodium Silicate Bonded Sand Core Heating by Microwave Energy

The properties of the materials used for making models of sodium silicate bonded sand core curing by microwave energy are suggested. The absorbency and penetrability for microwave energy of polymer and ceramics are measured and analyzed. Polymer and ceramics can be used for making models of sodium silicate bonded sand cores curing by microwave energy. The merits of polymer are its high strain, good tenacity and easy making. The merits of ceramics are its excellent heat-proof and abrasion-proof.     

NaCl胁迫对茄子幼苗叶片叶绿素荧光参数和能量分配的影响

以茄子幼苗为试材,研究了不同浓度NaCl胁迫下叶绿素荧光参数的变化.结果表明:随着NaCl胁迫加剧,最大荧光(Fm)、PSII最大光化学效率(Fv/Fm)、PSII潜在活性(Fv/Fo)、PSII实际光化学效率(ФPSII)、天线转化效率(Fv＇/Fm＇)、光化学荧光猝灭系数(qP)和电子传递速率(ETR)均表现出降低的趋势,初始荧光(Fo)、非光化学荧光猝灭系数(NPQ)和PSⅡ激发能压力(1-qP)均上升;光化学反应的能量(P)在叶片所吸收的光能中所占的比例也逐渐减少,天线色素耗散的能量(D)表现出和P相反的趋势,非光化学反应耗散的能量(E)变化不稳定,天线热耗散是耗散过剩能量的主要途径.表明NaCl胁迫下,茄子幼苗光系统反应中心受到损伤,光合电子传递过程受到抑制.     

Measure and Analysis on the Temperature Field of Sodium Silicate Bonded Sand Heating by Microwave Energy

The temperature field of sodium silicate bonded sand heating by microwave energy is measured and analyzed by the related characteristic quentities. The result shows that sodium silicate bonded sand heating by microwave energy has characters such as temperature rising speedy and heating occurring from inside to outside at the same time. The reasons of those characters are discussed by testing and analyzing. The viewpoint that the temperature rising of sodium silicate bonded sand heating by microwave energy is revocable by sodium silicate absorbing microwave energy is proposed. The results of this study are useful on rightly understanding the essentials of the heating by microwave energy for sodium silicate sand and rightly constituting heating technology.     

Study on the Technology and Engineering Application Method of Sodium Silicate Bonded Sand Cured by Microwave Energy

The Influences of modulus and dosage of sodium silicate and microwave energy heat up technology for instant strength and retained strength are measured and analyzed by the numbers. The results show that instant strength is reduced when the time of microwave energy heat up is too long. The engineering application design is recommended.     

Experimental Analysis on Energy Dissipation Mechanism and Seismic Performance of Steel Truss Coupling Beam-Coupled Shear Wall Structure

Pseudo-dynamic tests and low cyclic reversed loading tests on two-floor coupled shear wall planar structures were conducted, and one is arranged with two steel truss coupling beams, the other is arranged with a steel coupling beam and a RC coupling beam. The shear walls’ seismic response under different earthquake intensity was deliberated, Their failure mechanism, bearing capacity, hysteretic ductility, energy dissipation mechanism, and stiffness and strength degradation mechanism were analyzed as well. The results show that the shear wall with two steel truss coupling beams has reasonable stiffness distribution. Its energy dissipation mechanism, stiffness and strength degradation mechanism can fulfill the demands of coupled shear wall’s seismic design: under rare earthquake, it can maintain good bearing capacity and stiffness, and keep restraining the walls. Its seismic performance is superior to RC coupling beams-coupled shear wall system.     

Experimental Research on Pressure Elastic Waves Propagating in the Artificial Bile Duct System Model

In this Study, according to theprinciple of similitude, the model of bile duct system (that is BSM)has been simulated by transparent rubber and has been verified. Aspecific oscillator DZ-5 for the biliary system produced the pressure elastic waveswith differentwave shapes, frequency and amplitudes. A microcomputersystem are used to study the principle of the pressure elastic waves propagating in BSM and the function of Oddis sphincter, and then the experiment of removing gallstones on the experimental installation of BSM is carried out. Amechanism for movinggallstonesthat based on the theoreticalanalysis is verified by this study, and then to be perfected. It is suggested to put the one-way valve in T-type tube for patients whose sphincters loseeffectiveness. The optimum parameters of pressure elastic waves and the effect of pulse frequency on the removing gallstones have to be furtherdiscussed.     

Study on Calculation Method of Energy Savings for Public Buildings

According to the principles of various methods and energy consumption characteristics in Chongqing, new method of energy saving calculation is proposed for public buildings. It's shown that building envelope, facilities and energy management play the key role in energy saving reconstruction. Considering the difficulty of measuring adjustment quantity, the calculation should be under some certain prerequisites (design conditions), also the prevailing industry standards can be fully utilized. During the energy saving calculation, another key point is how to reflect the contribution rate of the single technologies for energy saving reconstruction.     

风沙对策勒开花期棉花光合特性的影响研究

为评估风沙灾害对策勒棉区开花期棉花生长的影响,以‘新陆中21号’为供试品种,2011—2012年在新疆策勒荒漠草地生态系统国家野外科学观测研究站农民常规栽培模式田内进行风沙对比观测试验,研究经纱网保护、水洗处理与自然状态下开花期棉花单叶的净光合速率、气孔导度、蒸腾速率、胞间CO2浓度等光合特性日变化的差异。结果表明：风沙对棉花生长的危害不仅仅是降尘附着在棉花叶片上降低了叶片接受光合有效辐射的效率,减少叶片对二氧化碳的吸收,减缓叶片上水分的蒸腾速率,而引起叶片光合速率下降。而且还有风沙流在长期吹袭叶片时,其所含沙粒直接打击棉花植株,使其生理结构受到损伤,阻遏其碳同化能力,降低了棉花的物质积累,进而使棉花生长受到影响。     

超高压杀菌技术在食品中的应用

研究了食品超高压杀菌技术的作用机理及其最新研究进展;讨论了压力大小、温度、pH值、水分活度以及食物本身的组成等因素对超高杀菌效果的影响;介绍了超高压杀菌对食品品质,如脂类、风味物质、Vc、蛋白质、过氧化物酶和淀粉的影响.     

砂田降雨入渗过程的模拟实验研究

砂田是一种具有综合效能的旱作技术,在干旱半干旱地区得到了不同程度的应用。为了研究砂石覆盖下降雨入渗的规律,笔者进行了室内模拟实验,对土壤水分的动态变化过程进行了研究。结果表明：在模拟降雨过程中,砂石覆盖下土壤的累计产流量一直低于裸土,说明砂石覆盖有利于减少土表降雨产流。砂石覆盖的土壤的各个深度土壤含水率均比裸土对照组要高,表明砂石覆盖有降雨入渗到土壤中。在经过一定时间的降雨后,砂石覆盖土柱中不同深度的土壤含水率变化会趋于稳定,且数值接近,表明砂石覆盖的土壤比裸土更快地进入稳渗阶段。     

Application of the Tamping Method on ImprovingUnsolidated Sand and Gravel Foundation

This paper presents a method of tamping for improving unconsolidated sand and gravel foundation backfilled on the flood land,and introduces the principles of soil improvement with some engineering cases. Results from the field tests show that this method is reliable,economical and feasible.It provides reliable basis for applying this method on other similar engineering projects hereafter.     

Study on the Energy Consumption of Atrium Buildings

This paper reviews the evolvement of the atrium. In this paper the function of atria in buildings and the thermal performance and climatic factors of atria were described. The factors influencing the energy consumption of atrium buildings were analyzed and some measures for energy saving were presented. By using a computer simulation, the impact of the atrium's physical parameters including atrium proportion, top-glazing area and atrium wall mass on its energy costs was studied.     

Estimating and Verifying the Pressure for Driving Static Pressure Piles Penetrating Cobble Stratum

This paper draws up a formula to estimate the pressure to drive static pressure piles penetrating the cobble stratum. The related engineering material is analyzed to verify the correctness of the formula. Some conditions needed to estimate the pressure are put forward.     

Study on the Application of Energy Efficiency Building Design Based on BIM Technology

In light of the current situation of energy efficiency building design in China and the situation of energy analysis tools application both at home and abroad,aiming at the fact that traditional energy efficiency building design methods cannot meet current needs,this paper puts forward a new design approach-integrating BIM technology with energy efficiency analysis to carry out energy efficiency building design.The virtual building model created with BIM technology is an electronic database containing all of the building's information.By importing this virtual building model into energy analysis tools,we can automatically identify and analyze the model's great amount of information so as to quickly and easily get the energy efficiency analysis results.     

Research on Energy Consumption and Energy Efficiency Design for Department Stores in Chongqing

In order to research energy efficiency design of public buildings, the large and medium scale of typical department stores in Chongqing are chosen as objects and twelve stores are investigated about their operational energy. Based on the investigation results, the composition and features of operational energy are analyzed ; it is shown that the short of effective measures in respect of architectural design leads to the high power consumption in department stores. According to the local climate and environment characteristics, this paper puts forward concept of holistic energy efficiency and offers series of design strategies which lead to energy conservation in stores,such asefficiency.regardingclimate as resources and applying appropriate technology to attain energy efficiency.     

玉米耐低氮基因型筛选压力的选择

收集了贵州省喀斯特高原生态型玉米自交系、杂交种及农家品种，采用溶液培养的方法，对玉米耐低氮基因型的筛选压力展开了较为系统的研究，初步获得以下研究结果：（1）在极低N胁迫（O．05mmol／L）条件下，不同玉米基因型的缺素症状、地上部干重、根干重、根冠比及植株总吸氮量的基因型差异显著，更易评价和鉴定玉米基因型的耐低氮营养特性。因而，氮素胁迫压力为0．05mmol／L时，较适于对耐低氮基因型材料的筛选。（2）在极低供N条件下，贵毕303基因型具有较高的氮效率，这主要来源于吸收效率的差异，该基因型在低N下总吸氮量最高；而绵单1号、安单136和兴黄单89—2表现出较强的耐低氮特性。     

通过多元回归分析农村分布式可再生能源选择的行为研究

为了解决能源危机问题和中国农村低碳经济发展中遇到的问题,以农村户用沼气为典型的分布式可再生能源进行研究,对河北省高家庄的农村能源情况进行调研,以面谈的方式调查农户213户,总结有效问卷为152份,并在此基础上对农户基本情况及可再生能源(“三沼”)使用情况进行统计分析,利用多种回归分析方法来研究农村分布式可再生能源选择行为,分别分析了农民收入、文化程度、能源支出与沼气采用之间的关系,继而运用Logistic多元统计分析得出了农民收入和文化程度对农户可再生能源选择行为有显著性影响的结论,并对该地区未来沼气的采用情况进行了预测分析,以期为各种农村分布式可再生能源的推广提供一定的参考。