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Parameters analysis of shearer drum loading performance

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Mining Science and Technology 2011年第5期21卷 621-624页

作者： Liu Songyong du Changlong Zhang jiajia Jiang Hao School of Mechanical and Electrical Engineering China University of Mining 6 Technolog3 Xuzhou 221116 China

Three drums with different helical angles （15°, 20°, and 25°） were developed to investigate improved loading performance of the shearer drum. Nine trials were performed at different drum rotation speeds （80, 100, and 120 r/min） and different haulage speeds （1.5, 2.0, and 2.5 m/min） in an orthogonal test design. Loaded coal quantity and cutting power of the drum were the responses measured under the dif- ferent conditions. The effect of the parameters was determined by means of the extreme difference method. The significance of the effects was determined by analysis of variance. The results indicate that the effect from changes in the helical vane on loading performance of the drum is the largest in magnitude. The haulage speed has the least affect on loading performance. The helical angle has the least affect on cutting power of the drum. Haulage speed has the largest affect on the cutting power of the drum. 2011 Published by Elsevier B.V. on behalf of China University of Mining ＆ Technology.

关键词： Shearer drumLoading coal performanceOrthogonal testSignificance analysis

Phase-sensitive manipulation of squeezed state by a degenerate optical parametric amplifier inside coupled optical resonators

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Optoelectronics Letters 2022年第3期18卷 135-142页

作者： DI Ke WANG Wenbo CUI Wei GUO Junqi LIU Yu du jiajia Chongqing Engineering Research Center of Intelligent Sensing Technology and Microsystem Chongqing University of Post and TelecommunicationsChongqing 400065China

In this paper, we investigate the quantum fluctuations of subharmonic reflected field from a triple-resonant degenerate optical parametric amplifier(OPA) inside coupled optical resonators, which is driven by the squeezed beam at signal frequency. By controlling the relative phase between the pump beam and the injected signal beam, we can see the quantum fluctuation in the phase direction and amplitude direction due to the parametric down-conversion process in the cavity. Thus, the phase sensitive operation of the compression field is realized due to the quantum interference between the harmonic field of the down converter of OPA and the inner field of the coupled optical resonator. We verified the quantum coherent phenomena of OPA in coupled optical resonators and phase-sensitive manipulations of quantum entanglement for quantum information processing. We realized the electromagnetically induced transparency-like(EIT-like) effect and the optical parameter conversion process at the same time in one optical device. These properties can favor higher manipulation precision and control efficiency, which is more suitable for the integration of quantum-on-chip systems, laying a foundation for the practical application of quantum information.

关键词： quantum parametric degenerate

Graphdiyne oxide doping for aggregation control of hole-transportnanolayer in inverted perovskite solar cells

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Nano Research 2022年第11期15卷 9734-9740页

作者： Xu Cai Jin Tang Min Zhao Le Liu Zhibin Yu jiajia du Ling Bai Fushen Lu Tonggang Jiu Yuliang Li Science Center for Material Creation and Energy Conversion Institute of Frontier and Interdisciplinary Science&School of Chemistry and Chemical EngineeringShandong UniversityQingdao 266237China Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province Shantou UniversityShantou 515063China Beijing National Laboratory for Molecular Sciences(BNLMS) Institute of ChemistryChinese Academy of SciencesBeijing 100190China

The strong aggregation tendency of hole transport material poly[3-(4-carboxylbutyl)thiophene-K(P3CT-K)restricts its further application in inverted perovskite solar cells(PSCs).Here,we report an effective strategy to address this issue and achieve the superior performance of inverted methylammonium lead triiodide(MAPbI3)PSCs,in which graphdiyne oxide(GDYO)doped P3CT-K nanocomposites are applied as the hole transport nanolayer(HTL).It is revealed that the strongπ–πstacking interaction occurs between GDYO and P3CT-K,which is proved by the blue shift of the absorption peak of P3CT-K *** aggregation control via GDYO contributes to the property improvement of P3CT-K ***,the homogeneous coverage induces the growth of perovskite grain with larger size than that based on the undoped *** a result,the optimized surface morphology,enhanced conductivity,charge extraction as well as better crystal quality,finally improve the device *** optimal power conversion efficiency of 19.06%is achieved,with simultaneously improved fill factor and short circuit current *** work presents the potential of functional graphdiyne(GDY)in the development of highly efficient photovoltaic device.

关键词： graphdiyne oxide perovskite solar cells hole transport layer aggregation control carriers transfer

Broadband multi-channel quantum noise suppression and phase-sensitive modulation based on entangled beam

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Chinese Physics B 2023年第10期32卷 191-198页

作者：邸克谈帅程安宇刘宇杜佳佳 Chongqing University of Post and Telecommunications Chongqing 400065China

We present a theoretical scheme for broadband multi-channel quantum noise suppression and phase-sensitive modulation of continuous variables in a coupled resonant system with quantum entanglement *** effects of different coupling strengths,pumping power in suppressing quantum noise and controlling the width of quantum interference channels are analyzed ***,quantum noise suppression at quadrature amplitude is obtained with phase-sensitive *** shows that the entanglement strength of the output field and the quantum noise suppression effect can be enhanced significantly by a strong pumping filed due to interaction of pumping light with the nonlinear *** full width at half maxima(FWHM)of the noise curve at the resonant peak(△=0 MHz)is broadened up to 2.17 times compared to the single *** the strong coupling resonant system,the FWHM at △=0 MHz(△=±3.1 MHz)is also broadened up to 1.27(3.53)times compared to the weak coupling resonant system *** multi-channel quantum interference creates an electromagnetically induced transparent-like line shape,which can be used to improve the transmission efficiency and stability of wave packets in quantum information processing and quantum memory.

关键词： quantum entanglement broadband quantum interference phase-sensitive modulation

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当下国产影片如何讲好中国故事

北京电影学院学报 2020年第7期 71-77页

作者：沈莹杜佳珈北京电影学院管理学院北京电影学院电影学系

党的十八大后,习近平总书记第一次提出并阐释了"中国梦"的概念。中国梦具有全面系统的理论构架、科学的思想内涵,进一步发展了中国特色社会主义理论体系。习近平总书记在党的十九大报告中指出"我国社会主要矛盾已经转化为人民日益增长... 详细信息

党的十八大后,习近平总书记第一次提出并阐释了"中国梦"的概念。中国梦具有全面系统的理论构架、科学的思想内涵,进一步发展了中国特色社会主义理论体系。习近平总书记在党的十九大报告中指出"我国社会主要矛盾已经转化为人民日益增长的对美好生活的需要和不平衡不充分的发展之间的矛盾",对作为满足人类精神文明需求的文艺创作提出了新的要求。近年来,电影产业飞速发展,但是同时也出现票房飞速增长与电影质量不佳之间的矛盾,如何讲好中国故事,拍好中国电影成为有担当的中国电影人非常关切的问题。

关键词：中国故事主旋律电影中国梦

Overview and Prospect of Distributed Energy P2P Trading

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Energy Engineering 2025年第1期122卷 379-404页

作者： jiajia Liu Mingxing Tian Xusheng Mao School of Automation and Electrical Engineering Lanzhou Jiaotong UniversityLanzhou730070China

After a century of relative stability in the electricity sector,the widespread adoption of distributed energy resources,along with recent advancements in computing and communication technologies,has fundamentally altered how energy is consumed,traded,and *** change signifies a crucial shift as the power system evolves from its traditional hierarchical organization to a more decentralized *** the heart of this transformation are innovative energy distribution models,like peer-to-peer(P2P)sharing,which enable communities to collaboratively manage their energy *** effectiveness of P2P sharing not only improves the economic prospects for prosumers,who generate and consume energy,but also enhances energy resilience and *** allows communities to better leverage local resources while fostering a sense of collective responsibility and collaboration in energy ***,there is still no extensive implementation of such sharing models in today’s *** on distributed energy P2P trading is still in the exploratory stage,and it is particularly important to comprehensively understand and analyze the existing distributed energy P2P trading *** paper contributes with an overview of the P2P markets that starts with the network framework,market structure,technical approach for trading mechanism,and blockchain technology,moving to the outlook in this field.

关键词： Distributed energy P2P market mechanisms classification and comparison

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上市公司杠杆收购法律规制困境及出路

南方金融 2019年第12期 92-100页

作者：杜佳佳西南政法大学经济法学院

杠杆收购本身是价值中立的收购方式,但目前国内资本市场的投机色彩较浓,引发了杠杆收购的负外部效应,暴露出杠杆收购过程中的多重风险,一是收购资金杠杆率较高且结构复杂,二是杠杆收购的信息披露不充分、不及时或者进行选择性信息披露,... 详细信息

杠杆收购本身是价值中立的收购方式,但目前国内资本市场的投机色彩较浓,引发了杠杆收购的负外部效应,暴露出杠杆收购过程中的多重风险,一是收购资金杠杆率较高且结构复杂,二是杠杆收购的信息披露不充分、不及时或者进行选择性信息披露,三是中小投资者的知情权难以得到保障,部分投资者的利益受损严重。在现行法律法规和监管规则体系下,对杠杆收购进行法律规制面临较大困难,一是我国尚无有关杠杆收购的实定法内容,除专门性规定缺失外,具体融资形式的监管制度也有待完善;二是杠杆收购的信息披露制度不健全,现行规则未体现杠杆收购的特殊要求;三是对杠杆收购违法违规行为的处罚力度不足,民事救济制度乏力。为了充分发挥杠杆收购的资源配置功能,同时有效保护投资者权益、维护资本市场秩序,建议构建杠杆收购的整体规制框架,完善杠杆收购融资工具的具体监管规则;优化上市公司信息披露制度,根据持股目的设定差异化的信息披露义务,适当减低收购信息披露义务的触发点;加大对杠杆收购违法违规行为的行政处罚力度,对潜在违法违规行为进行有效震慑;畅通杠杆收购的民事救济途径,帮助中小投资者摆脱弱势地位,保证其利益损失及时得到偿付。

关键词：公司收购杠杆收购融资工具信息披露投资者权益保护

金融领域穿透式监管探析:制度源起与适用前瞻

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西南金融 2019年第2期 65-73页

作者：杜佳佳西南政法大学经济法学院重庆401120

"穿透式监管"自提出以来便备受金融领域的关注,频频出现于监管机构的规范性文件中。从我国金融监管实践来看,穿透式监管能有效破解混业经营下金融创新业务的监管困境,推进功能监管的改革趋势。然而,目前穿透式监管的适用存在一定的法律... 详细信息

"穿透式监管"自提出以来便备受金融领域的关注,频频出现于监管机构的规范性文件中。从我国金融监管实践来看,穿透式监管能有效破解混业经营下金融创新业务的监管困境,推进功能监管的改革趋势。然而,目前穿透式监管的适用存在一定的法律障碍,集中体现为主体单一且缺乏协调、规范层级低且实施细则缺失,以及监管权的扩张倾向。为推进其适用,必须从主体协调机制、立法规范体系、适度干预原则等方面克服法律障碍,形成相对完善的制度环境;另外,应坚持穿透产品性质、强化信息披露及投资者适当管理等核心理念,使其成为真正行之有效的监管措施。

关键词：金融监管穿透式监管功能监管行为监管混业经营金融创新监管套利信息披露投资者适当性投资者保护金融监管改革

我国地方性银行适用展业地域限制的制度反思与完善

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南方金融 2023年第1期 90-99页

作者：杜佳佳西南政法大学经济法学院重庆401120

我国地方性银行适用展业地域限制的实践源自于农村信用社和城市信用社设立时期的合作制定位,在银行业市场改革化过程中曾放宽限制,后由于风险防控再度趋于严格。如今,促使地方性银行回归本地化经营已成为银行业监管的基本导向,《商业银... 详细信息

我国地方性银行适用展业地域限制的实践源自于农村信用社和城市信用社设立时期的合作制定位,在银行业市场改革化过程中曾放宽限制,后由于风险防控再度趋于严格。如今,促使地方性银行回归本地化经营已成为银行业监管的基本导向,《商业银行法》修改建议稿也试图将经营地域限制的规定纳入其中。然而,地域限制是一把“双刃剑”,对地方性银行适用展业地域施加严限制,也可能诱发地方性银行政策性功能异化、市场竞争回避与地方政府过度干预等问题和风险,对于适用限度难以把握。现行监管规范体系仍以管制性理念、命令式规制和政策性规范为主,对地域限制潜在风险防控的制度安排还需进一步完善。为此,建议通过引入谦抑性理念、适当限缩地域限制适用范围,实施激励性规制以引导地方性银行主动服务本地金融市场,优化法律性规范以提高地域限制政策的适当性、遵从度与稳定性,完善地方性银行差异化监管框架,从而推动我国地方性银行监管走向良法善治。

关键词：银行监管商业银行法跨区域展业本地化经营普惠金融