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Objective The decomposition of hydrogen sulfide to produce hydrogen can avoid waste gas pollution and utilize the resource to a greater degree. The preparation of high-efficiency and stable H2S decomposition catalysts at medium and low temperature and the exploration of their catalytic kinetic behavior are helpful to construct a new process for the efficient decomposition of H2S promoted by the sulfur chemical chain. Methods The catalyst Cr2S3 was prepared using the solution combustion method. The composition and structure of the catalyst were characterized by XRD, BET and SEM/EDS. Additionally, its catalytic performance, stability and reaction kinetics in the catalytic decomposition of H2S for hydrogen production were investigated. This paper also studies the effect of fuel ratio on the catalyst's hydrogen production performance. Results Under the reaction conditions of (H2S) = 5% and GHSV = 24 000 h-1, Cr2S3-T1.50 has the highest H2S conversion rate, up to 16.01% at 800 °C, and no other side reactions appear. The kinetic analysis of the reaction shows that the apparent activation energy of H2S decomposition catalyzed by Cr2S3-T1.50 is 50.7 kJ/mol. Conclusion The Cr2S3 catalyst prepared with the solution combustion method has excellent hydrogen production activity and stability at 400-800 °C and can significantly reduce the apparent activation energy of hydrogen sulfide decomposition. [ABSTRACT FROM AUTHOR]

感知距离对旅游者的目的地选择行为具有重要影响.运用独立样本T检验法和单因素方差分析法对旅游者感知距离的影响因素进行了研究.得到：在同等实际距离水平下①性格是影响感知距离的显著因素，性格外向的旅游者的感知距离比性格内向的旅游者的感知距离近.②目的地有无亲友是影响感知距离的显著因素，在目的地有亲友的旅游者的感知距离比在目的地无亲友的旅游者的感知距离近.③旅游目的是影响感知距离的显著因素，以商务会议或探亲访友为目的的旅游者的感知距离比以纯旅游为目的的旅游者的感知距离近.④旅游次数是影响感知距离的显著因素.随着旅游者去同一旅游目的地次数的增多，旅游者对该旅游目的地的感知距离会逐渐变近.⑤旅游经验是影响感知距离的显著因素，并且旅游者的旅游经验越丰富对距离的感知越近.⑥性别、年龄、学历、家庭收入、职业、旅游方式和交通方式7个因素对感知距离的影响不显著.但总体上，女性旅游者的感知距离比男性旅游者近；家庭收入高的旅游者的感知距离比家庭收入低的旅游者近；团队旅游者的感知距离比自驾车和散客旅游者近.

良好的旅游交通通达性是旅游资源开发和旅游地建设的必要条件，对目的地的运营和稳步发展至关重要. 应用通达性指数和社会网络分析方法中的点度中心度、中间中心度、平均最短路径长、网络密度、中心势等指标，对西安目的地内部45个旅游景点和10个交通口岸的旅游交通通达性进行了定量研究，得到：(1)旅游交通具有不同于普通交通的特殊性，不能简单地用普通交通通达性指数来衡量旅游交通通达性.(2)社会网络分析法中的度数中心度、中间中心度和平均最短路径长分别是度量目的地内部各景点之间或交通口岸到景点之间点对点便利度、中转便利度和全网直达便利度的合适指标，网络密度、程度中心势和中介中心势等指标是衡量目的地内部旅游交通网络发育程度的合适指标.(3)虽然西安目的地内部景点之间、交通口岸与景点之间的交通道路连接水平较高，但公交线路包括旅游专线数量和分布状况、机场大巴站点数量和设置位置等不能完全满足散客旅游者的需求，旅游交通便利程度有待提高.(4)西安目的地内部景点的分布具有大分散、小集中的特点，亟待通过改变偏远景点与市区景点之间的交通连接方式提高偏远景点的旅游交通便利程度.(5)在国际和国内旅游市场日益散客化的形势下，旅游城市的交通规划应重视散客旅游者的交通需求.提出了新的旅游交通通达性评价视角和指标.

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In the process of coal resources exploitation, comprehensive evaluation of occurrence lacks, the paper used GIS spatial information technology to achieve quantitative extraction of coal. The method can do quantitative analysis to achieve a maximum amount of coal seams. Variable selection, vector space, attribute information extraction and coal mining conditions can he quantitatively analyzed. A comprehensive evaluation by the discrete smooth interpolation gets the conclusion that except the coal seam thickness and the inclination angle, the number of seam mezzanine is also an important factor for coal mining. The stability degree of seam roof is related to the magma intrusion; the good seam thickness bands, the low dimensional stability is. This study can guide mining engineering layout and provide a reference method for mining design. [ABSTRACT FROM AUTHOR]

Copyright of Research & Exploration in Laboratory is the property of Research & Exploration in Laboratory and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tourism Tribune / Lvyou Xuekan is the property of Tourism Institute of Beijing Union University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)