Coherent beam combining(CBC) of fiber laser array is a promising technique to realize high output power while maintaining near diffraction-limited beam quality. To implement CBC, an appropriate phase control feedback ...Coherent beam combining(CBC) of fiber laser array is a promising technique to realize high output power while maintaining near diffraction-limited beam quality. To implement CBC, an appropriate phase control feedback structure should be established to realize phase-locking. In this paper, an innovative internal active phase control CBC fiber laser array based on photodetector array is proposed. The dynamic phase noises of the laser amplifiers are compensated before being emitted into free space. And the static phase difference compensation of emitting laser array is realized by interference measurement based on photodetector array. The principle of the technique is illustrated and corresponding simulations are carried out, and a CBC system with four laser channels is built to verify the technique. When the phase controllers are turned on, the phase deviation of the laser array is less than λ/20, and ~ 95% fringe contrast of the irradiation distribution is obtained. The technique proposed in this paper could provide a reference for the system design of a massive high-power CBC system.展开更多
县域是我国资源禀赋最丰富的区域,也是新型城镇化和农业现代化的耦合点。在推进碳达峰碳中和的过程中,县域的生态功能举足轻重。县域兴衰关系着我国发展全局,推动县域经济高质量发展是时代赋予的使命。本文以某县为研究区,利用长期能源...县域是我国资源禀赋最丰富的区域,也是新型城镇化和农业现代化的耦合点。在推进碳达峰碳中和的过程中,县域的生态功能举足轻重。县域兴衰关系着我国发展全局,推动县域经济高质量发展是时代赋予的使命。本文以某县为研究区,利用长期能源替代规划系统(Long-range Energy Alternatives Planning system,LEAP)构建适用于县域的碳达峰预测模型,分析县域碳达峰情景,对重点领域进行碳达峰预测。未来,县域要因地制宜,多措并举,以高质量发展推进碳达峰碳中和,以降碳为抓手,实现绿色低碳发展。展开更多
目的:观察扶元通痹汤辅助治疗腰椎退行性骨关节病的疗效。方法:选择河南中医药大学第一附属医院收治的腰椎退行性骨关节病患者95例,采用随机数字表法分为两组。对照组41例给予双氯酚酸钠肠溶缓释胶囊,每次100 mg,1 d 1次,口服;合艾灸(取...目的:观察扶元通痹汤辅助治疗腰椎退行性骨关节病的疗效。方法:选择河南中医药大学第一附属医院收治的腰椎退行性骨关节病患者95例,采用随机数字表法分为两组。对照组41例给予双氯酚酸钠肠溶缓释胶囊,每次100 mg,1 d 1次,口服;合艾灸(取穴:阿是穴、大肠俞、肾俞),每次30 min,1 d 1次;加推拿(取穴:阿是穴、关元、气海、大肠俞、肾俞),隔天治疗1次。治疗组54例在对照组的治疗基础上加用扶元通痹汤(药物组成:杜仲、桑寄生、川续断、独活、制川乌、淫羊藿、牛膝、丹参、熟地黄、骨碎补、白花蛇等),1 d 1剂,每剂煎取药液400 mL,每次200 mL,分早晚2次温服。两组均治疗14 d判定疗效。结果:治疗组显效29例,有效23例,无效2例,有效率为96.30%(52/54);对照组显效16例,有效15例,无效10例,有效率为75.61%(31/41)。两组疗效对比,差异有统计学意义(P<0.05)。治疗组治疗后中医症状评分、疼痛视觉模拟法评分、Oswestry功能障碍指数评分、日本骨科协会评分均较对照组改善,血清白细胞介素-6、肿瘤坏死因子-α、基质金属蛋白酶-3、骨形态发生蛋白水平较对照组改善,差异均有统计学意义(P<0.01)。结论:扶元通痹汤联合西药、艾灸和推拿治疗腰椎退行性骨关节病有较好疗效,能够改善临床症状,缓解疼痛,改善腰椎功能,降低炎症反应。展开更多
随着互联网经济的发展,直播行业已经成为我国国民经济发展中的重要力量。网络直播的快速发展,给人们带来新的经济发展的同时,也给直播平台带来负面效应,比如直播内容效果差,抓不住消费者产生消费意愿的关键决策因素。本文基于S-O-R模型...随着互联网经济的发展,直播行业已经成为我国国民经济发展中的重要力量。网络直播的快速发展,给人们带来新的经济发展的同时,也给直播平台带来负面效应,比如直播内容效果差,抓不住消费者产生消费意愿的关键决策因素。本文基于S-O-R模型在消费者购买决策中的应用,通过问卷调查和数据分析,发现积极情绪和兴奋情绪对消费者购买决策有显著影响。研究结果显示,积极情绪和兴奋情绪存在内部相关关系,且这两种情绪均与消费者购买决策呈正相关。为提高消费者的消费力度,直播间应打造优质内容,提高优惠力度,提供附加服务,并优化直播流程和场景。此外,重视用户评价和利用消费者“从众心理”,以及打造品牌吸引粉丝也是提升消费者购买决策的有效策略。With the development of the Internet economy, the live broadcasting industry has become an important force in the development of China’s national economy. The rapid development of network broadcast not only brings new economic development to people, but also brings negative effects to live broadcast platforms. For example, the effect of live broadcast content is poor, and the key decision-making factors of consumers’ consumption willingness cannot be captured. Based on the application of S-O-R model in consumers’ purchase decision, this paper finds that positive emotions and excited emotions have a significant impact on consumers’ purchase decision through questionnaire survey and data analysis. The results show that there is an internal correlation between positive emotion and excited emotion, and both emotions are positively correlated with consumers’ purchasing decisions. In order to improve the consumption of consumers, the broadcast room should create high-quality content, improve the preferential efforts, provide additional services, and optimize the live broadcast process and scene. In addition, paying attention to user evaluation and using consumers’ “herd psychology”, as well as building brands to attract fans, are also effective strategies to improve consumers’ purchasing decisions.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant No.62275272)the Training Program for Excellent Young Innovators of Changsha(Grant No.KQ2305025)。
文摘Coherent beam combining(CBC) of fiber laser array is a promising technique to realize high output power while maintaining near diffraction-limited beam quality. To implement CBC, an appropriate phase control feedback structure should be established to realize phase-locking. In this paper, an innovative internal active phase control CBC fiber laser array based on photodetector array is proposed. The dynamic phase noises of the laser amplifiers are compensated before being emitted into free space. And the static phase difference compensation of emitting laser array is realized by interference measurement based on photodetector array. The principle of the technique is illustrated and corresponding simulations are carried out, and a CBC system with four laser channels is built to verify the technique. When the phase controllers are turned on, the phase deviation of the laser array is less than λ/20, and ~ 95% fringe contrast of the irradiation distribution is obtained. The technique proposed in this paper could provide a reference for the system design of a massive high-power CBC system.
文摘县域是我国资源禀赋最丰富的区域,也是新型城镇化和农业现代化的耦合点。在推进碳达峰碳中和的过程中,县域的生态功能举足轻重。县域兴衰关系着我国发展全局,推动县域经济高质量发展是时代赋予的使命。本文以某县为研究区,利用长期能源替代规划系统(Long-range Energy Alternatives Planning system,LEAP)构建适用于县域的碳达峰预测模型,分析县域碳达峰情景,对重点领域进行碳达峰预测。未来,县域要因地制宜,多措并举,以高质量发展推进碳达峰碳中和,以降碳为抓手,实现绿色低碳发展。
文摘目的:观察扶元通痹汤辅助治疗腰椎退行性骨关节病的疗效。方法:选择河南中医药大学第一附属医院收治的腰椎退行性骨关节病患者95例,采用随机数字表法分为两组。对照组41例给予双氯酚酸钠肠溶缓释胶囊,每次100 mg,1 d 1次,口服;合艾灸(取穴:阿是穴、大肠俞、肾俞),每次30 min,1 d 1次;加推拿(取穴:阿是穴、关元、气海、大肠俞、肾俞),隔天治疗1次。治疗组54例在对照组的治疗基础上加用扶元通痹汤(药物组成:杜仲、桑寄生、川续断、独活、制川乌、淫羊藿、牛膝、丹参、熟地黄、骨碎补、白花蛇等),1 d 1剂,每剂煎取药液400 mL,每次200 mL,分早晚2次温服。两组均治疗14 d判定疗效。结果:治疗组显效29例,有效23例,无效2例,有效率为96.30%(52/54);对照组显效16例,有效15例,无效10例,有效率为75.61%(31/41)。两组疗效对比,差异有统计学意义(P<0.05)。治疗组治疗后中医症状评分、疼痛视觉模拟法评分、Oswestry功能障碍指数评分、日本骨科协会评分均较对照组改善,血清白细胞介素-6、肿瘤坏死因子-α、基质金属蛋白酶-3、骨形态发生蛋白水平较对照组改善,差异均有统计学意义(P<0.01)。结论:扶元通痹汤联合西药、艾灸和推拿治疗腰椎退行性骨关节病有较好疗效,能够改善临床症状,缓解疼痛,改善腰椎功能,降低炎症反应。
文摘随着互联网经济的发展,直播行业已经成为我国国民经济发展中的重要力量。网络直播的快速发展,给人们带来新的经济发展的同时,也给直播平台带来负面效应,比如直播内容效果差,抓不住消费者产生消费意愿的关键决策因素。本文基于S-O-R模型在消费者购买决策中的应用,通过问卷调查和数据分析,发现积极情绪和兴奋情绪对消费者购买决策有显著影响。研究结果显示,积极情绪和兴奋情绪存在内部相关关系,且这两种情绪均与消费者购买决策呈正相关。为提高消费者的消费力度,直播间应打造优质内容,提高优惠力度,提供附加服务,并优化直播流程和场景。此外,重视用户评价和利用消费者“从众心理”,以及打造品牌吸引粉丝也是提升消费者购买决策的有效策略。With the development of the Internet economy, the live broadcasting industry has become an important force in the development of China’s national economy. The rapid development of network broadcast not only brings new economic development to people, but also brings negative effects to live broadcast platforms. For example, the effect of live broadcast content is poor, and the key decision-making factors of consumers’ consumption willingness cannot be captured. Based on the application of S-O-R model in consumers’ purchase decision, this paper finds that positive emotions and excited emotions have a significant impact on consumers’ purchase decision through questionnaire survey and data analysis. The results show that there is an internal correlation between positive emotion and excited emotion, and both emotions are positively correlated with consumers’ purchasing decisions. In order to improve the consumption of consumers, the broadcast room should create high-quality content, improve the preferential efforts, provide additional services, and optimize the live broadcast process and scene. In addition, paying attention to user evaluation and using consumers’ “herd psychology”, as well as building brands to attract fans, are also effective strategies to improve consumers’ purchasing decisions.
