山西龙矿主斜井黄土层施工技术的创新与实践

山西龙矿能源投资开发有限公司主斜井设计长度860m,倾角15°。井口以下有220m穿过黄土层,施工过程中遇到了两大难题:井口下90-130m段遇到含水层,黄土含水丰富,泥化严重,流动性强;井口下180-220m段,顶部黄土层厚度达到55-70m,进入深部带压区,随掘随垮塌和冒落,以致于施工现场困难重重。针对以上两种情况,分别采取不同的施工技术:对富水黄土层,采用U棚穿楔导峒的施工工艺,对深部带压黄土层,采用U棚导峒支护,最后完成永久支护。     

Exploring the factors of using mobile ticketing applications: Perspectives from innovation resistance theory

This passenger resistance to adopting innovative mobile services has been widely discussed and needs more examination. The present research model used the innovation resistance theory factors, including usage barriers, value barriers, risk barriers, tradition barriers, and image barriers, to verify the antecedents of mobile ticketing application usage. A mobile ticketing app includes making seat reservations, payment, ticket collection, and entry and boarding procedures. Additionally, the model considers the impact of technological anxiety, personal innovation characteristics, informativeness, and word of mouth to identify critical factors in determining resistance barriers and willingness to adopt. A questionnaire was distributed over the Internet, and responses were analyzed using statistical analysis software to test the proposed hypotheses. The analysis results found that the factors of Innovation Resistance Theory negatively affected intention to use the T-Express app. Among these, the tradition barrier is the first key factor. Moreover, the consumer and communication characteristics had significant effects on barrier factors. This research provides useful insights and suggestions for improving mobile ticketing app usage based on the findings.     

基于EIS的质子交换膜燃料电池输出性能优化

质子交换膜燃料电池(proton exchange membrane fuel cell, PEMFC)输出性能的影响是多方面的，极化曲线仅能反映燃料电池稳态外输出特性，不能充分反映具体影响因素及规律，因此需研究其内部物理参数的动态变化。通过建立电堆内阻和交流阻抗特性模型，利用电化学交流阻抗谱(electrochemical impedance spectroscopy, EIS)分析不同温度和湿度下燃料电池的内阻动态特性。结果表明，在333~353 K温度范围内，随着温度的增加，燃料电池的内阻减小；当温度不变时，相对湿度的增加能减小电堆内阻，燃料电池输出性能增强。最后，基于15kW燃料电池测试平台进行性能试验，验证了燃料电池动态特性分析的正确性，为进一步优化PEMFC输出性能提供理论支持。     

Actions in phygital space: Work solidarity and collective action among app-based cab drivers in India

This study delineates the microprocesses of solidarity development and the subsequent collective actions of gig workers in India amidst multiple structural constraints. Using netnography, semi-structured interviews and direct observation, we show how digitally naive app-based cab drivers amalgamate physical and digital spaces, construct a phygital space free of managerial gaze and leverage it to bond and bridge, create webs of care and share and resist multiple oppressive forces, individually and collectively. Thus, we broaden the conceptualisation of worker agency beyond labour-management antagonism and extend the extant literature on solidarity development and resistance in gig work by identifying a spatial enabler, phygital free space and the expansive role of relationship-based commitment. Relationship-based commitment not only functions as a membership mobiliser but also helps mobilise collective resistance when interwoven with an external threat-based identity created through injustice framing.     

等离子喷涂梯度耐热陶瓷涂层的研究展望

主要概述了耐热梯度陶瓷涂层的研究现状 ,阐述了耐热梯度陶瓷涂层的制备、组织和性能研究的成果和存在的问题 ,并提出了耐热梯度陶瓷涂层发展的新方向     

Dynamics of contention in the gig economy: Rage against the platform,customer or state?

Protest in the gig economy has taken many forms and targets (platforms, customers and state officials). However, researchers are yet to adequately account for this diversity. We use a European survey of Upwork and PeoplePerHour platform workers to investigate worker orientation towards different forms of protest. Results reveal that worker anger, dependence and digital communication shape contention in the remote gig economy. Support for collective organisation is associated with anger at platforms as well as their dependence on the platform and communication with other workers. Individual action against clients is associated with anger and communication but not dependence. Support for state regulation is associated only with anger but not dependence or communication. We conclude that the relational approach entailed by Mobilisation Theory can aid explanation in the gig economy by shedding light on the dynamic process by which solidarity and dependence alter the perceived cost/benefits of particular remedies to injustice.     

Cooperative membership and adoption of green pest control practices: Insights from rice farmers

Reducing the use of chemical pesticide while preserving crop yield is a practical strategy that makes agricultural production economically, socially and environmentally sustainable. Although the adoption of green pest control practices can help achieve such a goal, its adoption rate remains quite low. This study explores whether membership in agricultural cooperatives improves smallholder farmers' adoption of green pest control practices, utilising farm-level data surveyed from rice farmers in China. To enrich our understanding, we also investigate how the adoption of green pest control practices mediates the effects of cooperative membership on chemical pesticide expenditures. An endogenous switching probit model and a bootstrap-based mediation method are employed to achieve these goals. The empirical results show that cooperative membership significantly increases the probability of adopting physical pest control practices (e.g. pest-killing lamps or sticky plate traps) and biological pest control practices (e.g. biopesticides) by 6% and 19%, respectively. Cooperative membership significantly reduces chemical pesticide expenditures through its mediation effect on improving the probability of adopting biological pest control practices. There is also a complementary relationship between physical and biological pest control practices in pest management of rice production. The adoption of physical pest control practices significantly increases rice yield, while the adoption of biological pest control practices does not.     

纤维素酶处理对针织牛仔性能的影响

为了解决机械摩擦导致的织物表面光洁度和手感差的问题,基于纤维素酶与机械摩擦复合处理织物的优点,采用酸性纤维素酶对牛仔布进行水洗,通过正交试验设计,探索了纤维素酶浓度、浸泡温度、浸泡时间、pH值对织物白度、耐磨性、顶破强力和弯曲性能的影响。结果表明,温度及pH值对白度的影响显著,纤维素酶浓度对织物顶破强力的影响大于其他因素。用纤维素酶处理后,针织牛仔的耐磨性增强,白度增大。因此,纤维素酶可使针织牛仔的使用性能得到有效改善。