受老空水威胁工作面巷道防治水实践

针对高庄煤矿3_上1104回风巷为沿空掘巷,巷道掘进期间受3_上1102老空水威胁,掘进开采存在严重的水患安全问题,采用超前打设疏水孔的方案来治理老空水威胁,对巷道采用调向增大护巷煤柱厚度等措施实现巷道安全快速掘进,探放水期间无淹巷情况发生,探放水后巷道顶板和上帮无淋水现象发生。     

Suitability Evaluation of Cultivated Land Reserved Resources in Arid Areas Based on Regional Water Balance

With rapid socioeconomic and population growth, high-quality arable land resources are decreasing daily, especially in arid areas, which makes arable land reserve resources an important way to supplement arable land. How to accurately evaluate cultivated land reserve resources is of great significance to socioeconomic development and sustainable land use in arid areas. Therefore, this study selected Hangjin Banner as a typical area and calculated the regional maximum available irrigation water based on the principle of regional water balance. Then, the "irrigation area check algorithm" was used to evaluate the amount of cultivated land reserve resources, and policy recommendations were proposed for the development and utilization of cultivated land resources. The results showed that Hangjin Banner had no cultivated land reserve resources under the current irrigation method and had cultivated land reserve resources under the efficient water-saving irrigation method, but only in the southern zone during normal and partially abundant water years. Therefore, we believe that arid areas should adhere to the "set land by water" principle, the allocation of water resources should be optimized, and cultivated land resources with high quality should be utilized based on the actual regional conditions.

     

Enhanced photoelectric properties of PbSnSe thin films via quick oxygen ion-implantation sensitization

Journal of Materials Science - Although chalcogenide materials continue to generate considerable interest due to great potentials for various optoelectronic devices, annealing for a long time in...     

偏铁酸钠催化合成共轭亚油酸

以红花菜籽油中亚油酸为原料,偏铁酸钠为催化剂,在单因素试验的基础上,选取反应温度、反应时间、催化剂用量为考察因素,以异构化产物共轭亚油酸(CLA)转化率为响应值,通过响应面分析法对异构化反应进行优化,并建立相应的回归模型,试验结果表明,红花菜籽油中亚油酸异构化为CLA的最佳工艺为:反应温度195℃、反应时间4.7 h、催化剂用量0.6 g,在此条件下得到CLA转化率为92.90％,与预测值93.92％相比,误差为1.02％.然后再通过脲素包合纯化、经2％的H2SO4-CH3OH溶液甲酯化后,用气相色谱-质谱联用仪检测CLA含量为64.27％.     

高含盐工业废水处理技术研究进展

现代工业生产的工业废水往往含有超量的有机危害物或过量的盐、酸碱等,在对此类废水进行处理时,传统的方法将无法起到有效的作用。且由于此类废水同样不适宜微生物的生长,利用微生物进行污水处理的方式也受到很大的局限。对于这种工业排污废水,在实现有机物的降解之外,还需要实现无机盐和废水的分离来达到排污标准。对现在针对高含盐废水的成熟处理技术进行了总结,介绍了几种常见处理技术的特点及应用,以及他们在实际高盐工业废水处理中的作用和一些问题。通过对现有高盐废水的处理技术的分析和了解,可以针对不同类型的高盐废水使用不同的处理方式以达到最大的经济效应,并且对实现排放量最小化具有重要意义。     

Augmented reality instructions for construction toys enabled by accurate model registration and realistic object/hand occlusions

Virtual Reality - BRICKxAR is a novel augmented reality (AR) instruction method for construction toys such as LEGO®. With BRICKxAR, physical LEGO construction is guided by virtual bricks....