小半径曲线箱梁预应力钢束张拉施工技术

以阿拉乡互通立交桥A匝道桥曲线梁的预应力张拉施工为例,介绍了小半径曲线箱梁预应力钢束张拉施工阶段的技术控制要点,通过该项工程施工的成功验证,对同类型曲线梁桥预应力张拉施工有一定的参考价值。     

探讨嵌岩桩和摩擦桩在强风化硬质岩中的优化性

目前,各种桩基础的经济因素分析,如何合理应用相应的基础类型,节约工程造价成为一项非常热门的研究探索方向。本文主要的探索方向是在基岩地区,当桩端持力层位于强风化硬质岩层上时,采用嵌岩桩和摩擦桩的角度对同一种桩型进行单桩极限承载力的计算,对计算结果进行对比分析,选择最经济的计算方法,为设计提供最优化的选择。     

物流连锁组织摩擦的产生及其特征分析

物流连锁组织是若干物流企业在重复交易过程中所形成的一种协作团队。从宏观上讲,物流连锁组织具有整合化、一体化特征,但微观上,各物流企业相互独立,拥有各自的利益,具有“经济人”行为,导致各种各样摩擦的产生。物流连锁组织的摩擦是客观存在的,并与其伴随始终,它有利有弊：既是物流连锁组织存在的基础又是物流连锁组织运行的障碍。     

影响织物起毛起球的主要原因分析

在平常生活中,我们衣物在穿着的过程中经常会出现起毛起球的现象,严重影响穿着舒适度和美观。笔者就织物起毛起球产生的机理、原因,进行详细的分析和研究。     

“双向”分权视角下的财政风险实证研究

"双向"分权即政府向市场分权与政府内部财政分权。在分权推进的过程中,伴随着财政风险的增减变化,理论分析和实证检验发现:政府向市场分权有利于降低财政风险,但这种积极影响呈现出下降趋势;政府内部财政分权程度的提高不利于财政风险的降低;"双向"财政分权立体交叉推进模式所产生的制度性摩擦大大增加了财政风险。因此需要以合理的制度安排消除改革过程中产生的各种社会风险。     

中美贸易摩擦对北京产业发展的影响及对策

新一轮中美贸易摩擦呈现出全面性、严峻性、战略性、长期性等特征,美国试图通过封锁核心技术来遏制我国产业高质量发展、抑制我国崛起,对北京产业发展带来了很大的不确定性。本文通过研究分析,认为中美贸易摩擦长期会从冲击对外贸易结构、减少企业利润、阻碍高技术产业发展、抑制企业海外并购、加大高端人才缺口等方面对北京产业发展产生负面影响,并提出了相应的对策建议,推动北京产业高质量发展。     

The belt and road initiative,cultural friction and ethnicity: Their effects on the export performance of SMEs in China

China’s Belt and Road Initiative (BRI) has provided Chinese firms with significant incentives to speed up the pace of internationalization. Yet very little international business (IB) research has been found to empirically examine such policy effects. This study explores this important issue using Chinese firms of different ethnicities in the Xinjiang Uygur Autonomous Region (XUAR) of China. We propose that the BRI has a positive formal institutional effect on the export performance of XUAR firms that target the “Belt” countries. Both cultural friction and ethnicity serve as the unique cultural contingencies that moderate the relationship between the BRI and export performance. More specifically, the cultural friction that results from the process of internationalization will negatively affect the export performance prompted by the BRI. The Uygur-owned firms will benefit more from the BRI due to their cultural similarity. Overall, the study takes the lead in investigating both internal conditions and external environments that promote and inhibit the internationalization process of small-to-medium enterprises (SMEs) in the XUAR that are geographically close to the “Belt” countries. The findings help enrich the understanding of the dual “push” and “drag” effects on the outcomes of SMEs’ international activities due to the government-led initiatives and the understanding of micro-foundation toward internationalization from an ethnicity perspective.     

Analysis of the impact of Sino-US trade friction on China’s stock market based on complex networks

This paper analyzes the impact of the Sino-US trade friction incident in 2018 on China's stock market by using the complex network methods. Firstly, we divide the Sino-US trade friction incident in 2018 into four research periods. Based on the GARCH-BEKK model and the Planar Maximum Filter Graph (PMFG) algorithm, the volatility spillover network between China's stock market sectors and the stock price correlation network of China's stock market corresponding to the above four research periods are constructed. Next, from the perspective of sectors in stock market, we use various network centrality indicators to build a systematic importance comprehensive evaluation index of industry sectors in the stock market through the principal component analysis method, to explore the impact of the Sino-US trade friction incident on the risk spillover effects of sectors in China's stock market. From the perspective of the overall stock market, we analyze the impact of Sino-US trade friction incident on the overall stability of the stock market through calculating the network topology indicators and conducting simulation experiments. Finally, the main factors affecting the stability mechanism of China's stock market are studied through the probit model. The results show that: (1) The risk spillover effect of various sectors in China's stock market changes significantly in different periods of Sino-US trade friction, and there are obvious cyclical rotation effects among various sectors (2) When some weighted stocks in the stock market abnormally fluctuate or suffer targeted shocks, the China's stock market's ability to maintain stability is weak, and the Sino-US trade friction will reduce the stability of China's stock market, and the higher the intensity of trade friction incident is, the more obvious the impact of the incident is. (3) The important factors that affect the abnormal fluctuations in China's stock market include four types of indicators: the stock market network structure, the fluctuation of important international stock indexes, the fluctuation of commodity prices in the international market, and the domestic macroeconomic indicators. This study provides a reference for China's financial regulatory authorities to conduct macro-prudential management, control systemic risks, and maintain the stability of financial market.     

高铝空心微珠在摩擦材料领域的应用前景分析

本文通过分析高铝空心微珠的物理、化学性质,列举了高铝空心微珠在填料中特别是在摩擦材料中的优异性能,指出将高铝空心微珠作为填料加入摩擦片,能够提高摩擦片的耐磨性、绝缘性和耐腐蚀性,适合在摩擦材料填料中推广使用。     

Cross-Country Externalities of Trade and FDI Liberalization

We develop a three-country heterogeneous-firm model and show that FDI liberalization in one foreign country (F1) results in the following: (i) some firms from the home country switch from export to FDI in F1; (ii) skilled labor’s wage rate drops in the home country; (iii) wage inequality between the skilled and unskilled labor decreases; and (iv) some firms from the home country switch from FDI to export to another foreign country (F2). The effects from trade liberalization are just the opposite, but the effects from education improvement are qualitatively the same as FDI liberalization. The cross-country externalities work through the domestic labor market.