粉尘预荷电与荷高压导电多孔陶瓷管耦合的除尘新技术研究

研究了粉尘预荷电与荷高压导电多孔陶瓷管耦合的除尘新技术。该技术首先通过设置直流负电晕（-20kV）的预荷电器对粉尘进行荷电,再使含尘气体穿过荷载高压负电（-5 000V）的导电多孔陶瓷管的管壁而进行过滤除尘。结果表明,该技术降低了导电多孔陶瓷管除尘过程的气体压降。在相同除尘时间（60min）内比较,该技术的粉饼压降（787Pa）仅为无荷电条件下粉饼压降（4 300Pa）的0.183倍;在相同粉饼质量（1 000g）的情况下比较,该技术的粉饼压降仅为无荷电条件下40 min粉饼压降（2 747Pa）的0.286倍。这很可能是因为粉尘荷电导致的颗粒间斥力使粉饼更加疏松,而且导电多孔陶瓷管荷载与粉尘相同的电荷,两者结合松散,减小了过滤过程中的气体压降。该技术有望显著降低工业多孔陶瓷管除尘过程的气体压降,并延长其再生周期

粉尘预荷电与荷高压导电多孔陶瓷管耦合的除尘新技术研究

研究了粉尘预荷电与荷高压导电多孔陶瓷管耦合的除尘新技术。该技术首先通过设置直流负电晕（-20kV）的预荷电器对粉尘进行荷电,再使含尘气体穿过荷载高压负电（-5 000V）的导电多孔陶瓷管的管壁而进行过滤除尘。结果表明,该技术降低了导电多孔陶瓷管除尘过程的气体压降。在相同除尘时间（60min）内比较,该技术的粉饼压降（787Pa）仅为无荷电条件下粉饼压降（4 300Pa）的0.183倍;在相同粉饼质量（1 000g）的情况下比较,该技术的粉饼压降仅为无荷电条件下40 min粉饼压降（2 747Pa）的0.286倍。这很可能是因为粉尘荷电导致的颗粒间斥力使粉饼更加疏松,而且导电多孔陶瓷管荷载与粉尘相同的电荷,两者结合松散,减小了过滤过程中的气体压降。该技术有望显著降低工业多孔陶瓷管除尘过程的气体压降,并延长其再生周期

钛合金TB6连接孔挤压强化残余应力及疲劳寿命试验研究

针对钛合金TB6连接孔，研究直接芯棒挤压强化工艺参数对钛合金耳片的强化效果，表征不同挤压量和挤压次数下连接孔塑性变形量、孔壁残余应力和表面粗糙度，测试挤压强化前后耳片的拉–拉疲劳寿命，分析疲劳断口的形貌特征及疲劳寿命提升的原因。结果表明，挤压强化几乎不能改善孔壁表面质量，但可以使孔壁发生剧烈的塑性变形，引入一定的残余压应力；随着挤压量的增大，塑性变形量增大，残余压应力引入峰值和深度均明显增大，衰减速度减小，而挤压次数的影响相对较小；挤压强化后疲劳寿命显著提高，经由3%挤压量挤压强化后的耳片疲劳极限提升至少38%

干旱区流域可持续水资源管理的理论及应用

针对国际水资源可持续管理前沿科学问题和我国干旱、半干旱区水资源管理重大需求,项目取得了具有里程碑性质的重大创新成果：在国际上率先提出了可持续水资源管理量化理论体系。在国际上建立了适用于无资料或少资料地区的干旱区分布式水文模型的新观点与新方法。在国内外率先总结提出水量-水质-生态耦合系统多箱模型方法。项目在国际著名干旱区塔里木河、黑河、博斯腾湖等流域的实际应用,创造了非常大的社会经济效益,证明具有很高的理论与实用价值,对可持续水资源管理做出了重要贡献。成果被中科院、清华大学、河海大学等国内外著名同行鉴定为国际领先水平,创造新疆科技进步鉴定最好水平

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies