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Non-state Political Theoretical Paradigm of African Union Citizenship
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作者 Odomaro Mubangizi 《International Relations and Diplomacy》 2014年第12期806-813,共8页
The charter that created the African Union came into effect in 2002. It is now 12 years in place but most Africans would not be sure whether they know the rationale and ultimate role of the AU in promoting good govern... The charter that created the African Union came into effect in 2002. It is now 12 years in place but most Africans would not be sure whether they know the rationale and ultimate role of the AU in promoting good governance, peace, security and progress on the continent. Annual summits take place in Addis Ababa, and several resolutions are taken, but it is though the respective heads of states just return to their colonially engineered states to resume business as usual. As a result, poverty, conflicts (both internal and regional), bad governance continue to plague the majority of the African countries with a few exceptions. Of late emerging economies such as China and India deal with Africa as if it were a one country--this could be the time for Africans to begin envisioning a new continental political architecture, with an African citizenship. The provisions of the African Union Charter are enshrined in the Constitutive Act, are summaries in Articles 3 and 4, that deal with objectives and principles. The objectives are (Desta, 2013, pp. 160-161): (1) Achieve greater unity and solidarity between the African countries and peoples of Africa; (2) Defend the sovereignty, territorial integrity and independence of its member states; (3) Accelerate the political and social-economic integration of the continent; (4) Promote and defend African common positions on issues of interest to the continent and its peoples; (5) Encourage intemational cooperation, taking due account of the Charter of the United Nations and the Universal Declaration of Human Rights; (6) Promote, peace, security and stability of the continent; (7) Promote democratic principles and institutions, popular participation and good governance; (8) Promote and protect human and people's rights in accordance with the African Charter on Human and Peoples' Rights and other relevant human rights instruments; (9) Establish the necessary conditions which enable the continent to play its rightful role in the global economy and in international negotiations; (10) Promote sustainable development at the economic. Social and cultural levels as well as the integration of African economies; (11) Promote co-operation in all fields of human activity to raise the living standards of African peoples; (12) Coordinate and harmonize the policies between the existing and future Regional Economic Communities for the gradual attainment of the objectives of the Union; (13) Advance the development of the continent by promoting research in all fields, in particular in science and technology; (14) Work with relevant international partners in the eradication of preventable diseases and the promotion of good health on the continent. The principles of the AU Constitutive Act are (Ibid. 162-163): (1) Sovereign equality and interdependence among Member Sates of the Union; (2) Respect for borders existing on achievement of independence; (3) Participation of the African peoples in the activities of the Union; (4) Establishment of a common defense policy for the African Continent; (5) Peaceful resolution of conflicts among Member States of the Union through such appropriate means as may be decided upon by the Assembly; (6) Prohibition of the use of force or threat to use force among Member States of the Union; (7) Non-interference by any Member State in the internal affairs of another; (8) The right of the Union to intervene in aMember State pursuant to a decision of the Assembly in respect of grave circumstances, namely: war crimes, genocide and crimes against humanity; (9) Peaceful co-existence of Member States and their right to live in peace and security; (10) The right of Member States to request intervention from the Union in order to restore peace and security; (11) Promotion of self-reliance within the framework of the Union; (12) Promotion of gender equality; m. Respect for democratic principles, human rights, rule of law and good governance; (13) Promotion of social justice to ensure balanced economic development; (14) Respect for the sanctity of human life, condemnation and rejection of impunity and political assassination, acts of terrorism and subversive activities; (15) Condemnation and rejection of unconstitutional changes of governments. While there is mention of participation of African peoples in the activities of the Union as principle (c) and objective (g), there is no explicit mention of civil society organizations (media, faith-based organizations, and NGOs) as principle actors in implementing the objectives of the Union. I want to argue that the failure of the respective African states to eradicate poverty, end armed conflicts, and address governance issues is caused by lack of a common regional integration model that takes an African Union citizenship seriously, but at the same time respecting the role of civil society and faith-based organizations, that predate the state in Africa. It is evident that Afi'ican Unity (AU) and sub-regional integration groups such as East African Community (EAC), Southern African Development Community (SADC), Economic Community Of West African States (ECOWAS), as well the New Partnership for Africa's Development (NEPAD), are designed and operationalized from a statist political philosophical framework. Moreover, since the African states are largely contested as a colonial creation, the AU cannot successfully implement the institution of an African citizenship without acknowledging the role of and giving space to non-state actors in AU and other regional integration models and initiatives. This paradigm shift will require rethinking the relationship between the state and non-state actors in Africa. 展开更多
关键词 African citizenship African Union non-state actors GOVERNANCE
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Non-state Investment Picking Up
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作者 Ru Qing 《China's Foreign Trade》 2000年第11期28-28,共1页
关键词 In non-state Investment Picking Up
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30 years of prosperity in China's non-state economy
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作者 刘迎秋 刘霞辉 《China Economist》 2008年第6期33-42,共10页
This article analyzes the basic experiences in the reform and development of China’s non-state-owned economy,based on a review of its distinctive features and major achievements of sustained rapid development over th... This article analyzes the basic experiences in the reform and development of China’s non-state-owned economy,based on a review of its distinctive features and major achievements of sustained rapid development over the last three decades since reform and opening began. It also identifies the problems facing further reform and development of China’s non-state-owned economy. Finally,it presents an outlook of the future of non-state-owned economic development. Looking ahead,the collectively owned economy in urban areas and townships is expected to enter a new stage of development based on transition and transformation; the individual and private economy will reach new heights of development; foreign invested enterprises will further boost economic and technological investment and raise the technological content of output. 展开更多
关键词 non-state-owned ECONOMY REFORM and development OUTLOOK
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Post-Arab Spring:The Arab World between the Dilemma of the Nation-State and the Rise of Violent Non-State Actors(VNSAs) 被引量:1
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作者 Hassanein Ali 《Asian Journal of Middle Eastern and Islamic Studies》 2020年第1期68-83,共16页
The Arab world has witnessed two interrelated phenomena after the Arab Spring.The first is the aggravation of the crisis of the nationstate,where many states experienced failure and disintegration,such as Libya,Syria ... The Arab world has witnessed two interrelated phenomena after the Arab Spring.The first is the aggravation of the crisis of the nationstate,where many states experienced failure and disintegration,such as Libya,Syria and Yemen,while many other states continued to suffer from weakness.The second is the rise of violent non-state actors(VNSAS)such as terrorist jihadi organisations,warlords,organised crime syndicates and armed militias affiliated with political parties,tribal,ethnic and sectarian groups.The second phenomenon is a natural outcome of the first one.When the state fails,it becomes unable to monopolise the use of force,impose its control over its territory and secure it borders.These conditions create a security and political vacuum and ungoverned spaces,which are considered a suitable environment for the expansion of VNSAs.Currently,in many Arab states,the role of VNSAs makes state-building and peacemaking efforts more difficult and complicated.This article aims to analyse the causes of the crisis of nation-state building in the Arab world,which explains the failure and collapse of many Arab states once the authoritarian regimes that have governed them for decades collapsed.Also,it discusses the types of VNSAs and the reasons behind the expansion of these actors and the escalation of their roles in many Arab countries,particularly in the post-Arab Spring era.Additionally,the future of VNSAS will be examined. 展开更多
关键词 Violent non-state actors Arab Spring Failed states Week states Islamic state AL-QAEDA war economy Libya SYRIA Yemen
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SPECIAL ISSUE: ANTI-CORRUPTION STRATEGIES IN TRANSITIONAL CHINA-- Criminal Sanctions against Non-state Functionaries Who Accept Bribes and Abuse Public Power
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作者 Li Huaisheng 《Social Sciences in China》 2011年第4期148-161,共14页
In order to penalize the acceptance of bribes by non-state functionaries who abuse public power, the anti-corruption system of China's criminal law has undergone successive transformations: from punishing non-state ... In order to penalize the acceptance of bribes by non-state functionaries who abuse public power, the anti-corruption system of China's criminal law has undergone successive transformations: from punishing non-state functionaries who accept bribes in accordance with the joint crime model to punishing them in accordance with the model for a single crime, and from seeking the rules of punishment in judicial interpretations to having the criminal code directly prescribe the criteria for determining a charge. Judicial interpretations have been particularly concerned with the punishment of non-state functionaries who have a relationship of common interests with a state functionary. The crime of accepting bribes given in return for trading in influence was established to solve the problem of the judicial vacuum created by judicial interpretations, but new legal obstacles have emerged. To generalize the class of offenders who accept bribes in return for using their influence is the route future improvement should take. 展开更多
关键词 non-state functionary particular affiliate close affiliates rules for closing off legal loopholes
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Securitization and State Sponsorship of Non-State Actors: Analyzing the Saudi-Iranian Rivalry
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作者 Akbar Khan Allauddin Kakar 《Fudan Journal of the Humanities and Social Sciences》 2023年第4期477-494,共18页
This article investigates the dynamics of rivalry and state sponsorship of non-state actors by explaining the Saudi-Iranian rivalry through the lens of securitization theory.The study elucidates that despite the endur... This article investigates the dynamics of rivalry and state sponsorship of non-state actors by explaining the Saudi-Iranian rivalry through the lens of securitization theory.The study elucidates that despite the enduring nature of their rivalry,both Iran and Saudi Arabia have exhibited a degree of restraint in escalating their conflicting dyadic relationship.It further notes that this behavior has forced them to securitize various issues in the region,framing them as potential threats to national and regime security,that has allowed them to build alliance and provide critical support to nonstate actors across the region.By so doing,Tehran and Riyadh seek to expand their influence and hunt their strategic and tactical objectives within the Middle East.This policy is primarily driven by geopolitical concerns rather than ideological or ethnic entitlements. 展开更多
关键词 Rivalry non-state actors Iran Saudi Arabia SECURITIZATION
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Promoting Financial Reform through the Development of Non-state Finance
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《World Economy & China》 SCIE 2001年第2期3-7,共5页
关键词 Promoting Financial Reform through the Development of non-state Finance
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刚性挡墙绕底部转动模式下有限土体非极限状态地震土压力
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作者 陕耀 董雅丞 +3 位作者 周彤 吴遥杰 黄嘉祺 巫立宇 《同济大学学报(自然科学版)》 北大核心 2026年第2期202-211,共10页
为探明刚性挡墙绕底部转动(RB)模式下有限土体非极限状态地震土压力变化规律,基于水平微分单元法和拟动力法,推导得出RB模式下挡墙间有限土体非极限状态地震土压力计算式,同时建立了对应的数值算法。实例分析显示,有限土体地震主动土压... 为探明刚性挡墙绕底部转动(RB)模式下有限土体非极限状态地震土压力变化规律,基于水平微分单元法和拟动力法,推导得出RB模式下挡墙间有限土体非极限状态地震土压力计算式,同时建立了对应的数值算法。实例分析显示,有限土体地震主动土压力表现出随时间变化的周期性特征与随深度变化的非线性特征,计算结果与振动台试验结果有良好的一致性。参数分析表明,地震侧土压力随初始内摩擦角的增加、墙底位移比的增加以及地震加速度系数的降低明显减小,地震土压力合力大小主要受初始内摩擦角和墙底位移比的影响,地震加速度系数则主要改变合力幅值,仅采用拟静力法进行的强震条件下挡墙抗震设计偏于不安全。研究结果可为实际工程中挡土结构抗震设计提供理论指导。 展开更多
关键词 地震土压力 非极限状态 微分单元法 挡土墙位移 拟动力法
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非国有股东参股、市场化经营机制与国企风险承担
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作者 戴媛媛 王彩萍 +1 位作者 张悦 周炫玲 《财经论丛》 北大核心 2026年第1期113-124,共12页
新一轮混合所有制改革强调既要“混资本”更要“改机制”,特别将建立市场化经营机制作为重要任务。本文以2010—2022年间国有上市公司为研究样本,着重从市场化经营机制视角,探究非国有股东参股与国有企业风险承担之间的关系。研究发现,... 新一轮混合所有制改革强调既要“混资本”更要“改机制”,特别将建立市场化经营机制作为重要任务。本文以2010—2022年间国有上市公司为研究样本,着重从市场化经营机制视角,探究非国有股东参股与国有企业风险承担之间的关系。研究发现,在新一轮国有企业混合所有制改革的背景下,非国有股东参股能显著提升国有企业的风险承担水平。其中,非国有股东参股主要通过推动国有企业人力资本结构优化升级、完善激励机制以促进管理层风险收益协同来提高国有企业风险承担水平。进一步研究发现,非国有股东参股对地方国企以及竞争性较弱行业、市场化水平较低地区国有企业的风险承担水平提升作用更显著。并且,非国有股东参股对企业风险承担水平的积极作用,促进了国有企业绩效的显著提升与核心技术的突破。 展开更多
关键词 非国有股东参股 企业风险承担 企业人力资本结构 企业激励机制
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国有企业混合所有制改革与技术雇员结构优化——来自制造业国有上市公司的经验证据
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作者 胡玥 马新啸 马文杰 《海南大学学报(社会科学版)》 2026年第1期172-182,共11页
技能人才是企业可持续发展和建设制造强国的核心力量,如何加强国有企业技能人才队伍建设是增强国有经济竞争力和推动经济社会高质量发展的关键环节,本文研究混合所有制改革背景下非国有股东治理对国有企业技术雇员结构的影响作用。研究... 技能人才是企业可持续发展和建设制造强国的核心力量,如何加强国有企业技能人才队伍建设是增强国有经济竞争力和推动经济社会高质量发展的关键环节,本文研究混合所有制改革背景下非国有股东治理对国有企业技术雇员结构的影响作用。研究发现:非国有股东参与国企高层治理可以显著缓解地方政府干预、增加人力资本投资以及完善员工工资激励机制,从而对国有企业技能人才结构产生优化作用,具体表现为技术雇员占比增加;进一步研究发现,非国有股东治理对国企技术雇员结构的优化作用在劳动力市场流动性较强、行业附加值较高的国有企业中更为凸显,技术雇员结构优化后的国有企业的劳动生产效率和生产能力得以提升。本文不仅对企业雇员流动和国有企业混合所有制改革的研究进行了有益补充,而且对决策高层在国家战略层面进一步全面深化国有企业改革提供了政策参考价值。 展开更多
关键词 国有企业 混合所有制改革 技术雇员 技能人才 非国有股东治理
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7075T652铝合金圆柱形锻件内部孔洞缺陷产生原因
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作者 杨瑞青 刘洪雷 +6 位作者 陈雷 石钰 白晓霞 高永强 贺文秀 徐磊 郑方园 《轻合金加工技术》 2026年第1期19-23,30,共6页
7075T652铝合金圆柱形锻件A级无损探伤发现孔洞缺陷。改变坯料的形状及锻造方式,圆柱形锻件心部孔洞依然没有改善。缺陷低倍组织、显微组织、扫描电镜组织显示了孔洞缺陷的位置、分布、形貌、内部断裂面,结合锻造变形应力状态分析了其... 7075T652铝合金圆柱形锻件A级无损探伤发现孔洞缺陷。改变坯料的形状及锻造方式,圆柱形锻件心部孔洞依然没有改善。缺陷低倍组织、显微组织、扫描电镜组织显示了孔洞缺陷的位置、分布、形貌、内部断裂面,结合锻造变形应力状态分析了其产生原因。结果表明,7075T652铝合金圆柱形锻件最终拔长时圆周方向产生的伸长变形集中于表层,使内部产生拉力,铸锭内部受拉区域的疏松气孔不能焊合,导致锻件内部产生孔洞缺陷。给出了解决圆柱形自由锻件内部孔洞缺陷的工艺方法,获得了A级探伤合格的锻件产品。 展开更多
关键词 7075T652铝合金锻件 A级无损探伤 心部孔洞缺陷 锻造变形 应力状态
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“混合战争”战略预警:挑战与对策
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作者 汪明敏 《情报杂志》 北大核心 2026年第2期1-7,38,共8页
深刻认识“混合战争”战略预警面临的主要挑战,研提对策建议,增强管控和应对“混合战争”的主动性、前瞻性。文献梳理与实践考察相结合,对传统战争战略预警与“混合战争”战略预警进行比较分析,得出结论。当前,“混合战争”战略预警面... 深刻认识“混合战争”战略预警面临的主要挑战,研提对策建议,增强管控和应对“混合战争”的主动性、前瞻性。文献梳理与实践考察相结合,对传统战争战略预警与“混合战争”战略预警进行比较分析,得出结论。当前,“混合战争”战略预警面临的主要挑战包括:战略预警对象多元化、隐蔽化;战略预警模型和指标复杂化、模糊化;战略预警节点难以把握。为提升战略预警能力,有效防范和应对“混合战争”,应丰富和扩展战略预警的内涵与外延、全面融合各类战略预警力量、科学构建更加完善的预警模型与指标体系、高度警惕信息与认知战。 展开更多
关键词 混合战争 战略预警 情报 非国家行为体 认知战
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小球藻固态发酵饲料的理化指标、挥发性成分和非靶向代谢组学分析
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作者 韩佳捷 郭腾飞 +3 位作者 冯启鑫 姚瑾珑 刘亚男 赵志军 《东华大学学报(自然科学版)》 北大核心 2026年第1期19-30,共12页
为提高自养小球藻(Chlorella sp.)在饲料应用领域的利用价值,使用酿酒酵母(Saccharomycescerevisiae)进行固态发酵,并评估发酵后小球藻饲料在营养价值、风味及代谢产物组成方面的变化。以小球藻和辅料(3∶2)为原料,接种10%酿酒酵母菌液... 为提高自养小球藻(Chlorella sp.)在饲料应用领域的利用价值,使用酿酒酵母(Saccharomycescerevisiae)进行固态发酵,并评估发酵后小球藻饲料在营养价值、风味及代谢产物组成方面的变化。以小球藻和辅料(3∶2)为原料,接种10%酿酒酵母菌液后在35℃下厌氧发酵2 d制得小球藻发酵饲料(FF),并对其进行理化指标、挥发性成分、非靶向代谢组学等分析。结果表明,与未发酵原料(unFF)相比,FF组的酸溶蛋白质量分数(14.36%)和多酚质量分数(7.28 mg/g)分别显著提高49.74%和62.86%(p<0.05)。脂肪酸谱在发酵过程中发生有益变化,FF组总脂肪酸质量分数和多不饱和脂肪酸(PUFA)占比分别较unFF组显著提高36.92%和2.98%,饱和脂肪酸(SFA)占比则显著下降4.06%。发酵后,FF组的风味和适口性得到改善,表现为乙酸异戊酯等具有芳香气味的挥发性物质在FF组中富集,而正己醛等具有不悦气味的挥发性物质相对质量分数下降。非靶向代谢组学分析表明,N-花生四烯酸-L-丝氨酸、高乌甲素等功能性小分子代谢物的相对质量分数在发酵后上升。综上所述,固态发酵可显著提高自养小球藻的营养价值和适口性。该技术可为小球藻作为饲料组分的应用提供技术支撑,并推动微藻固碳技术的可持续发展。 展开更多
关键词 小球藻 固态发酵 营养价值 适口性 非靶向代谢组学
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二(五氟苯基)锌调控无机钙钛矿光伏表面缺陷态密度
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作者 王跃霖 王三龙 《硅酸盐学报》 北大核心 2026年第1期164-170,共7页
无机钙钛矿太阳电池(IPSCs)的光和热稳定性良好,是叠层太阳电池(TSCs)优异的顶部电池候选者之一。然而,IPSCs的光吸收层和电子传输层(ETL)之间严重的非辐射复合限制了光电转换效率(PCE)的提升。利用二(五氟苯基)锌(B(PFP)Zn)对光吸收层/... 无机钙钛矿太阳电池(IPSCs)的光和热稳定性良好,是叠层太阳电池(TSCs)优异的顶部电池候选者之一。然而,IPSCs的光吸收层和电子传输层(ETL)之间严重的非辐射复合限制了光电转换效率(PCE)的提升。利用二(五氟苯基)锌(B(PFP)Zn)对光吸收层/ETL之间的界面缺陷态密度进行调控,B(PFP)Zn钝化了未配位的铅离子(Pb^(2+)),基于B(PFP)Zn空气制备的反式装置的开路电压平均提升约70 mV。此外,氟化苯基基团的疏水性使得装置耐湿性增强。 展开更多
关键词 无机钙钛矿太阳电池 二(五氟苯)锌 非辐射复合 缺陷态密度 耐湿性
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基于改进Unet++的多状态电器负荷分解方法
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作者 顾归 金姜亮 +1 位作者 郝亮亮 黄祁生 《电力科学与技术学报》 北大核心 2026年第1期85-97,共13页
针对目前非侵入式负荷分解技术存在的难以有效提取多状态电器在低功率状态下的功率特征和分解模型的泛化能力不足这两个问题,提出一种基于改进嵌套U型网络Unet++的多状态电器负荷分解方法。首先,在编码器-解码器框架中,采用具有并行结... 针对目前非侵入式负荷分解技术存在的难以有效提取多状态电器在低功率状态下的功率特征和分解模型的泛化能力不足这两个问题,提出一种基于改进嵌套U型网络Unet++的多状态电器负荷分解方法。首先,在编码器-解码器框架中,采用具有并行结构的编码器来增强对复杂功率信号的解析能力,通过跳跃连接确保解码器能够精确重建原始信号,提高分解的精细度;其次,引入双向长短期记忆网络(bidirectional long short-term memory,BiLSTM)模块捕捉时间序列的长期依赖关系,提升模型的学习与预测能力。实验结果表明,所提模型在英国家用电器级电力数据集(UK domestic appliance-level electricity dataset,UK-DALE)和功率分解参考数据集(the reference energy disaggregation dataset,REDD)上均能准确识别并分解多状态电器。通过公开数据集测试得出,该模型在平均绝对误差这一指标上表现优异,其性能优于现行其他方法。 展开更多
关键词 非侵入式负荷分解 多状态电器 低功率状态 Unet++ BiLSTM
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基于终端滑模转速环的PMSM无模型预测电流控制
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作者 周晓华 张鹏阳 +1 位作者 王月武 吴雪颖 《组合机床与自动化加工技术》 北大核心 2026年第2期79-84,共6页
针对永磁同步电机无模型预测控制系统中传统的转速环PI控制存在超调量大,鲁棒性差等缺点,以及传统的模型预测电流控制(MPCC)对电机参数变化敏感,参数不匹配会导致性能下降的问题,提出一种基于扰动观测器和新型非奇异快速终端滑模转速环... 针对永磁同步电机无模型预测控制系统中传统的转速环PI控制存在超调量大,鲁棒性差等缺点,以及传统的模型预测电流控制(MPCC)对电机参数变化敏感,参数不匹配会导致性能下降的问题,提出一种基于扰动观测器和新型非奇异快速终端滑模转速环的PMSM无模型预测电流控制策略。该策略在转速控制环设计中采用非奇异快速终端滑模控制算法,通过构造新型的滑模趋近律实现有限时间收敛特性。同时构建扩张状态观测器(ESO)对负载转矩等集中扰动进行动态估计,并设计前馈补偿机制将观测值注入控制器,形成具有强抗扰能力的双闭环控制架构,以提高系统的鲁棒性。电流环采用基于超局部模型的无模型预测电流控制(MFPCC)。该方法不依赖于电机参数,进一步提高了系统的鲁棒性。仿真结果表明,与传统的MFPCC相比,所提控制方法在动态响应性能、鲁棒性和参数适应性方面具有显著优势,能够有效抑制超调和抖振,提高了系统的控制精度和稳定性。 展开更多
关键词 永磁同步电机 新型非奇异快速终端滑模控制 无模型预测 扩张状态观测器
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基于ESO-非奇异终端滑模的静液压推土机转速控制研究
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作者 刘东航 刘凯磊 +3 位作者 杨静 张政 龚佳明 王程远 《机床与液压》 北大核心 2026年第2期76-82,共7页
静液压推土机作业过程中,由于液压系统的非线性特性及外部干扰等因素,存在转速控制精度偏低以及双侧同步性能不足等问题。针对此,提出一种基于变量泵-变量马达协同调控的高精度转速控制方法。对变量泵-变量马达转速控制系统进行数学建模... 静液压推土机作业过程中,由于液压系统的非线性特性及外部干扰等因素,存在转速控制精度偏低以及双侧同步性能不足等问题。针对此,提出一种基于变量泵-变量马达协同调控的高精度转速控制方法。对变量泵-变量马达转速控制系统进行数学建模;设计基于扩张状态观测器(ESO)与非奇异终端滑模控制(NTSMC)的复合控制器,通过ESO实时估计并补偿系统总扰动,结合NTSMC构造有限时间收敛滑模面,实现转速误差快速收敛,并基于李雅普诺夫理论严格证明闭环系统全局稳定性。为验证控制策略的有效性,搭建Simulink-AMESim联合仿真平台开展对比试验,结果表明:相较于传统PID控制,ESO-NTSMC的稳态跟踪相对误差减少62.5%,动态调节时间缩短62.07%。进一步进行试验验证,在0~10 km/h车速范围内,ESO-NTSMC控制下的马达转速误差比PID控制下减少了约36%,其直线跑偏率在0.9%内,能够有效提升推土机的同步控制精度,提高推土机的作业性能和系统稳定性。 展开更多
关键词 静液压推土机 扩张状态观测器(ESO) 非奇异终端滑模控制(NTSMC) 变量泵-变量马达
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基于MMC的电动汽车非等容退役锂电池能量均衡控制策略
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作者 吴青峰 王策 +2 位作者 刘立群 王腾光 薄利明 《电网技术》 北大核心 2026年第1期345-354,I0157-I0164,共18页
受安装容量、退役时间差异的影响,电动汽车退役锂电池(retire lithium battery,RLB)容量难以保持一致。然而,现有基于模块化多电平变换器(modular multilevel converter,MMC)的能量均衡方案无法有效均衡非等容RLB的能量。因此,研究一种... 受安装容量、退役时间差异的影响,电动汽车退役锂电池(retire lithium battery,RLB)容量难以保持一致。然而,现有基于模块化多电平变换器(modular multilevel converter,MMC)的能量均衡方案无法有效均衡非等容RLB的能量。因此,研究一种基于高电平大功率MMC的电动汽车非等容RLB的能量均衡方案,并以RLB的荷电状态(state of charge,SOC)参数来表征RLB的能量状态。分析了RLB容量因子对SOC均衡产生的影响;设计了MMC上、下桥臂,相间和子模块(sub-module,SM)内RLB的有功功率再分配模块,实现RLB输出有功功率与其容量成正比,从而消除了容量差异对SOC均衡的影响;提出改进型三级SOC均衡控制策略,实现了MMC上、下桥臂,相间和SM内RLB的SOC均衡。Matlab/Simulink仿真结果和小功率实验平台的实验结果表明,所提方案能够有效实现MMC上、下桥臂,相间和SM内等容/非等容RLB的SOC均衡。 展开更多
关键词 模块化多电平变换器 电动汽车 非等容退役锂电池 有功功率分配 荷电状态均衡
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企业绿色投资的非债务税盾效应
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作者 樊勇 田振宇 王永明 《中央财经大学学报》 北大核心 2026年第1期13-24,共12页
本研究基于2007年至2022年中国沪深A股上市公司的数据,探讨了企业绿色投资通过非债务税盾效应对资本结构的影响。研究发现,企业绿色投资与有息债务水平显著负相关,且当企业处于“税收耗损状态”时,绿色投资的非债务税盾效应进一步强化,... 本研究基于2007年至2022年中国沪深A股上市公司的数据,探讨了企业绿色投资通过非债务税盾效应对资本结构的影响。研究发现,企业绿色投资与有息债务水平显著负相关,且当企业处于“税收耗损状态”时,绿色投资的非债务税盾效应进一步强化,导致企业更加减少债务融资。此外,行业异质性分析表明,采矿行业的企业债务水平对绿色投资的变化反应更为敏感,而电力、热力、燃气及水生产行业则较为稳定。债务期限结构异质性的检验发现,绿色投资税盾更显著地影响短期债务,尤其在“税收耗损状态”下,企业通过绿色投资降低短期债务的动机更为强烈。本研究一方面,首次将绿色投资与非债务税盾效应结合,丰富了非债务税盾的研究范畴;另一方面,结合我国“双碳”战略背景,提出了优化绿色税收优惠政策的具体建议,以促进企业绿色投资的高质量发展。 展开更多
关键词 绿色投资 非债务税盾 企业资本结构 税收耗损状态
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一种基于伴随状态方程梯度计算的AVO阻抗三参数非线性反演方法
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作者 宫菡婕 刘致水 +3 位作者 高飞 包乾宗 Honggeun Jo 张嘉豪 《地球物理学报》 北大核心 2026年第2期857-872,共16页
地震叠前反演是获取地下介质弹性参数的主要手段.常规的非线性AVO反演方法多使用梯度下降类优化算法,需要计算目标函数的梯度方程,准确性和效率较低.针对此问题,本文提出一种基于伴随状态方程梯度计算的纵、横波阻抗及密度三参数反演方... 地震叠前反演是获取地下介质弹性参数的主要手段.常规的非线性AVO反演方法多使用梯度下降类优化算法,需要计算目标函数的梯度方程,准确性和效率较低.针对此问题,本文提出一种基于伴随状态方程梯度计算的纵、横波阻抗及密度三参数反演方法,在AVO反演公式的基础上推导了目标函数梯度的伴随状态方程,引入精度、效率优于常规优化算法的有限内存的拟牛顿优化算法(Limited memory-BFGS,即L-BFGS)求解反演目标函数.通过1-D、2-D模型数据及实际测井数据测试,证实该方法能够反演获得精确的纵、横波阻抗、密度及纵-横波速度比,抗噪性测试证实该方法对噪声的容许程度为信噪比大于约8~15 dB.将该方法应用于致密砂岩储层实际地震资料,所得结果与测井数据吻合度高,且能够反映横向地层展布规律,证实了该方法的有效性. 展开更多
关键词 AVO非线性反演 三参数反演 阻抗反演 伴随状态方程 致密砂岩储层
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