模具参数对模具寿命的影响

运用正交试验设计方法对影响模具寿命的锻造温度、冲孔连皮厚度、飞边槽高度等三种因素进行了比较试验 ,找出了影响模具寿命的三种因素的主次顺序。     

均质滤料过滤阻力的数学模型

以NaCl为示踪剂 ,测定滤层内水流电导率的变化 ,通过分析、计算可以得到滤层内絮体的体积比截留量 .不同条件下的试验结果表明 ,在过滤过程中 ,水头损失梯度的变化只与截留的絮体体积有关 ,与滤床厚度、加药量、滤速的改变几乎无关 .根据示踪剂实验结果 ,得出了滤层过滤阻力数学模型的具体表达式 ,并讨论了相关过滤阻力模型的适用性     

根分泌物对根际重金属动态的影响

介绍了采用上，下分根试验，使水稻根系下部生长在不同浓度铁营养液中，研究不同供铁处理对不同品种水稻吸收生金属和微量元素及其在体内转移和运输的影响。结果表明缺铁处理时常优８７－８８品种的植株地下部铁含量仅为正常供铁处理的５８％，而Ｃｄ，Ｚｎ的含量却比正常供的植株高１．４倍；缺铁时远诱一号和科长８９－１１３两个品种植株地上部含铁量也比正常供铁时低，但差异不如常优８７－８８明显，Ｃｄ，Ｚｎ含量比正常供铁时     

滇西北宁蒗地区喜山期斑岩带形成的构造机制

宁蒗地区地处扬子准地台西缘与松潘-甘孜褶皱系的接合部位．其东为南北向的康滇地轴．西为近南北向的三江构造带。这种特定的区域构造背景决定着本区基本的菱形构造格局。区内北东向金棉-木里断裂将本区划为两个不同的建造-构造区：宁蒗西北区和宁蒗东南区。宁蒗东南区受四条北东向与北西向深断裂为界的宁南菱形构造控制，形成了叙方对称型的宁南反凸双孤联合构造。该宁南反凸双孤联会构造东弧带追踪基底南北向构造所形成的包都-波罗弧形断裂构造，控制了本区喜山期斑岩带的形成和分布。区内斑岩群（体）主要分布于该主干控岩断裂带与其它多方向构造的复合系统中。通过模拟实验，进步验证了区内斑岩带的控岩造机制。     

采用土地处理系统处理城市生活污水的实验室模拟研究

土地处理系统作为一种生态处理技术,以其设备简单、投资少、操作简便、能耗低以及净化效果良好而具有广阔的发展前景。实验采用赣南典型红土作土地处理系统的土样,采用间歇方式布水处理城市生活污水,其CODCr的去除率达到90%以上。     

工业固硫洁净型煤的开发试验研究

较系统地阐述了一种固硫洁净型煤的工艺和技术，通过实验室试验和中试，该固硫洁净型煤固硫效果显著，能有效控制和降低燃煤中的硫对大气的污染。     

Effective advocacy: the psychological mechanisms of environmental issue framing

ABSTRACT

While environmental issues are among the most serious threats to human security, they tend to rank toward the bottom of Americans’ priorities for political action. To redress this, environmental organizations strategically frame their mobilization communications in an attempt to garner the public’s support. Advocacy research groups encourage the use of motivational, economic and personal frames because of their ability to mobilize support through distinct psychological processes: efficacy, psychological proximity and emotion. An experimental study is conducted that tests the extent to which these mechanisms mediate environmental frames’ effects on support for an environmental campaign. Results of this study lead to the conclusion that motivational frames are unable to elicit efficacy in the target audience, thus proving ineffectual at influencing attitudes or behaviors. Economic and personal frames are more successful, aligning the audience’s attitudes with the message and operating through psychological proximity, sadness and anger to induce behavioral support for the environmental campaign.     

Infiltration and redistribution of LNAPL into unsaturated layered porous media

Enhanced understanding of light non-aqueous phase liquid (LNAPL) infiltration into heterogeneous porous media is important for the effective design of remediation strategies. We used a 2-D experimental facility that allows for visual observation of LNAPL contours in order to study LNAPL redistribution in a layered porous medium. The layers are situated in the unsaturated zone near the watertable and they are inclined to be able to observe the effect of discontinuities in capillary forces and relative permeabilities. Two experiments were performed. The first experiment consisted of LNAPL infiltration into a fine sand matrix with a coarse sand layer, and the second experiment consisted of a coarse sand matrix and a fine sand layer. The numerical multi-phase flow model STOMP was validated with regard to the experimental results. This model is able to adequately reproduce the experimental LNAPL contours. Numerical sensitivity analysis was also performed. The capillarity contrast between sands was found to be the main controlling factor determining the final LNAPL distribution.     

火力发电厂粉煤灰干燥特性研究

介绍了利用实验台对粉煤灰的干燥特性进行试验研究的情况 ,给出了粉煤灰的干燥曲线、干燥速率曲线和粉煤灰平衡湿含量计算式 ,分析了在干燥过程中粉煤灰的阻力特性 ,为粉煤灰干燥装置的工业化设计提供了理论依据     

A sensibility analysis of model selection in modeling the reactive transport of cesium in crushed granite

We performed a sensibility analysis of model selection in modeling the reactive transport of cesium in crushed granite through model calibration and validation. Based on some solid phase analysis data and kinetic batch experimental results, we hypothesized three two-site sorption models in the LEHGC reactive transport model to fit the breakthrough curves (BTCs) from the corresponding column experiments. The analysis of breakthrough curves shows that both the empirical two-site kinetic linear sorption model and the semi-mechanistic/semi-empirical two-site kinetic surface complexation model, regardless of their complexity, can match our experimental data fairly well under given test conditions. A numerical experiment to further compare the two models shows that they behave differently when the pore velocity is not of the same order of magnitude as our test velocities. This result indicates that further investigations to help determine a better model are needed. We suggest that a multistage column experiment, which tests over the whole range of practical flow velocities, should be conducted to help alleviate inadequate hypothesized models.