Analysis of the joint detection capability of the SMILE satellite and EISCAT-3D radar

The Solar wind Magnetosphere Ionosphere Link Explorer(SMILE)satellite is a small magnetosphere–ionosphere link explorer developed cooperatively between China and Europe.It pioneers the use of X-ray imaging technology to perform large-scale imaging of the Earth’s magnetosheath and polar cusp regions.It uses a high-precision ultraviolet imager to image the overall configuration of the aurora and monitor changes in the source of solar wind in real time,using in situ detection instruments to improve human understanding of the relationship between solar activity and changes in the Earth’s magnetic field.The SMILE satellite is scheduled to launch in 2025.The European Incoherent Scatter Sciences Association(EISCAT)-3D radar is a new generation of European incoherent scatter radar constructed by EISCAT and is the most advanced ground-based ionospheric experimental device in the high-latitude polar region.It has multibeam and multidirectional quasi-real-time three-dimensional(3D)imaging capabilities,continuous monitoring and operation capabilities,and multiple-baseline interferometry capabilities.Joint detection by the SMILE satellite and the EISCAT-3D radar is of great significance for revealing the coupling process of the solar wind–magnetosphere–ionosphere.Therefore,we performed an analysis of the joint detection capability of the SMILE satellite and EISCAT-3D,analyzed the period during which the two can perform joint detection,and defined the key scientific problems that can be solved by joint detection.In addition,we developed Web-based software to search for and visualize the joint detection period of the SMILE satellite and EISCAT-3D radar,which lays the foundation for subsequent joint detection experiments and scientific research.

Development Model and Characteristics of Rural Land Joint Stock-cooperative System

We introduce and analyze operating mechanism of three major rural land joint-stock cooperative systems in China,including community type(Nanhai model),collective leasing type(Ningxia Pingluo model) and joint operating type(Zhejiang Jiande model).Current rural land joint-stock cooperative system has following characteristics.Firstly,adhere to the collective ownership and household contract responsibility system in rural areas.Secondly,safeguard farmers' land contractual rights and interests.Thirdly,implement large-scale agricultural production and operation.Fourthly,carry out normative operation of farmers' cooperatives.On the basis of these,we point out such problems as backward technology and short of funds in development of rural land joint-stock cooperative system.Finally,we conclude that the development of rural land joint-stock cooperative system should fully draw lessons from foreign advanced experience,actively try new model like securitization of rural land,to explore a road suitable for current national conditions.

Stability and oscillations in a slow-fast flexible joint system with transformation delay

Flexible joints are usually used to transfer velocities in robot systems and may lead to delays in motion transformation due to joint flexibility. In this paper, a linkrotor structure connected by a flexible joint or shaft is firstly modeled to be a slow-fast delayed system when moment of inertia of the lightweight link is far less than that of the heavy rotor. To analyze the stability and oscillations of the slowfast system, the geometric singular perturbation method is extended, with both slow and fast manifolds expressed analytically. The stability of the slow manifold is investigated and critical boundaries are obtained to divide the stable and the unstable regions. To study effects of the transformation delay on the stability and oscillations of the link, two quantitatively different driving forces derived from the negative feedback of the link are considered. The results show that one of these two typical driving forces may drive the link to exhibit a stable state and the other kind of driving force may induce a relaxation oscillation for a very small delay. However, the link loses stability and undergoes regular periodic and bursting oscillation when the transformation delay is large. Basically, a very small delay does not affect the stability of the slow manifold but a large delay affects substantially.

The chaotic behavior among the oil prices, expectation of investors and stock returns: TAR-TR-GARCH copula and TAR-TR-TGARCH copula

This paper has two aims. The first one is to investigate the existence of chaotic structures in the oil prices, expectations of investors and stock returns by combining the Lyapunov exponent and Kolmogorov entropy, and the second one is to analyze the dependence behavior of oil prices, expectations of investors and stock returns from January 02, 1990, to June06, 2017. Lyapunov exponents and Kolmogorov entropy determined that the oil price and the stock return series exhibited chaotic behavior. TAR-TR-GARCH and TAR-TR-TGARCH copula methods were applied to study the co-movement among the selected variables. The results showed significant evidence of nonlinear tail dependence between the volatility of the oil prices, the expectations of investors and the stock returns. Further, upper and lower tail dependence and comovement between the analyzed series could not be rejected. Moreover, the TAR-TR-GARCH and TAR-TR-TGARCH copula methods revealed that the volatility of oil price had crucial effects on the stock returns and on the expectations of investors in the long run.

3D v_P and v_S models of southeastern margin of the Tibetan plateau from joint inversion of body-wave arrival times and surface-wave dispersion data

A new 3D velocity model of the crust and upper mantle in the southeastern （SE） margin of the Tibetan plateau was obtained by joint inversion of body- and sur- face-wave data. For the body-wave data, we used 7190 events recorded by 102 stations in the SE margin of the Tibetan plateau. The surface-wave data consist of Rayleigh wave phase velocity dispersion curves obtained from ambient noise cross-correlation analysis recorded by a dense array in the SE margin of the Tibetan plateau. The joint inversion clearly improves the Vs model because it is constrained by both data types. The results show that at around 10 km depth there are two low-velocity anomalies embedded within three high-velocity bodies along the Longmenshan fault system. These high-velocity bodies correspond well with the Precambrian massifs, and the two located to the northeast of 2013 Ms 7.0 Lushan earthquake are associated with high fault slip areas during the 2008 Wenchuan earthquake. The aftershock gap between 2013 Lushan earthquake and 2008 Wenchuan earthquake is associated with low-velocity anomalies, which also acts as a barrier zone for ruptures of two earthquakes. Generally large earthquakes （M 〉 5） in the region occurring from 2008 to 2015 are located around the high-velocity zones, indicating that they may act as asperities for these large earthquakes. Joint inversion results also clearly show that there exist low-velocity or weak zones in the mid-lower crust, which are not evenly distributed beneath the SE margin of Tibetan plateau.

Motion planning for redundant prismatic-jointed manipulators in the free-floating mode

This paper investigates the motion planning of redundant free-floating manipulators with seven prismatic joints. On the earth, prismatic-jointed manipulators could only position their end-effectors in a desired way. However, in space, the end-effectors of free-floating manipulators can achieve both the desired orientation and desired position due to the dynamical coupling between manipulator and satellite movement, which is formally expressed by linear and angular momentum conservation laws. In this study, a tractable algorithm particle swarm optimization combined with differential evolution （PSODE） is provided to deal with the motion planning of redundant free-floating prismatic-jointed manipulators, which could avoid the pseudo inverse of the Jacobian matrix. The polynomial functions, as argument in sine functions are used to specify the joint paths. The co- efficients of the polynomials are optimized to achieve the desired end-effector orientation and position, and simulta- neously minimize the unit-mass-kinetic energy using the redundancy. Relevant simulations prove that this method pro- vides satisfactory smooth paths for redundant free-floating prismatic-jointed manipulators. This study could help to recognize the advantages of redundant prismatic-jointed space manipulators.

农村集体经济组织成员资格认定的逻辑脉络及其展开

农村集体经济组织成员资格认定是农村集体产权制度改革的基础性工作,集体所有权主体的确定是该问题研究的逻辑起点。集体所有权不具有共有和总有等所有权构造类型的特征,同时投资关系说和类比国有资本授权经营体制论都不能对农村集体经济组织的产生渊源进行合理解释。在民法规范语境下,应将农村集体经济组织确定为集体所有权主体。就成员资格和成员权利的关系而言,两者相伴而生,成员资格实质上是从权利主体角度对成员权的描述,为成员权在主体面向的表达。基于此,集体成员资格认定的法律实质是对农民所享有的集体经济组织成员权予以确权。我国农村传统经营方式决定了农户是基本经营单位,从逻辑上应当将家庭成员与以家庭为单位取得权益的关系确定为按份共有,集体经济组织成员权主体应为集体经济组织成员而非农户。城乡二元体制导致户籍这一本质上与成员权利取得不具因果关系的因素被纳入认定标准之中,其证明作用不应被忽视。在传统路径下,应构建以出生事实为核心、其他亲缘关系为辅助的主体判断路径,同时明确列举其他除外情形,形成正反双向的认定机制。在农村集体产权制度改革背景下,基于股权类型设置,集体固有成员与股份经济合作社股东在范围上并非完全一致,未来应以恢复农村集体经济组织和集体成员权的私法属性为目标,分阶段对农村集体经济组织成员权制度进行渐进性改革。

创建行动导向下美丽乡村联创联建的规划设计方法探索

伴随着浙江省乡村发展愿景从“千万工程”到“美丽乡村”再到共同富裕的纵深推进,以单个行政村为单元的美丽乡村创建模式已经难以适应新的发展诉求。基于自然资源禀赋或基础设施地理空间连续性的美丽乡村联创联建工作,是破解各行政村独立发展的多重瓶颈的创新性尝试。针对具有明确的目标、资金、时间约束的美丽乡村创建行动,基于“产业-空间协同发展”的总体思路,试图探讨一种面向美丽乡村联创联建的规划设计方法,即“二阶三心法”。这一方法从乡村地区的存量资源切入,旨在系统性、创造性地回应创建行动目标,开展面向产业-空间复合型目标的空间规划干预:一是基于“土地矛盾最小化原则”进行空间节点设计,二是基于“空间投入-融合效益最大化原则”形成特色主线,三是基于“优先塑造-示范带动原则”打造示范样板。进一步的,结合湖州市道场乡菰城片区规划设计工作,探讨了该方法在产业策划和空间设计层面落地应用的关键问题和解决策略,为中国先发地区美丽乡村联创联建的规划设计工作提供经验借鉴。

“村-社”自治背景下农村股份合作社股权结构优化

"村-社"自治是村社治理-自治的平衡模式,在"村-社"自治背景下推动农村集体产权股份合作制改革,促进经济效率兼顾社会公平,具有十分重要的实践意义。科学合理的股权结构是"村-社"自治背景下农村股份合作社的基本要求。本文在问卷调研的基础上,对目前沿海先进地区的农村股份合作社的股权结构问题,主要从股权占比,股权的差异化等方面做了深入的总结和分析,并提出相应的优化路径。

基于DEA-Tobit两步法的股份制商业银行效率评价与分析

股份制商业银行在当代商业银行体系中已居于主体地位．利用数据包络分析（DEA）方法，对我国10家股份制商业银行1997～2004年的效率作了评价．在此基础上，运用Tobit模型，对股份制商业银行效率的影响因素作了分析．实证分析结果表明，资产获利能力与银行效率显著正相关，存贷比率与银行效率显著负相关．为了提高效率，银行应当切实提高资产质量，努力寻求流动性与盈利性的均衡发展．研究还发现，上市银行的效率明显高于非上市银行，应当积极推动非上市银行上市．

公司组织形态与证券(融资)权利--摈弃有限公司“改制上市”的法律习规

在中国目前法律实践中,有限公司如欲成为上市公司或行使公开融资的权利,需先透过"公司改制"环节,成为股份公司,再以股份公司身份申请公开发行。显然,目前公开融资的权利是根据企业组织形态来进行配置的。可是,无论是理论界还是实务界,都很少仔细去思考——企业公开融资的权利到底应当如何配置?在中国,有限公司占据公司数量的绝对多数,目前盛行的"先改制,后发行上市"的法律安排,存在诸如"引发上市包装"、"导致纠纷隐藏"、"引发PE腐败"、"不当增加企业融资成本"等弊端。"改制上市"并未有效地改观公司治理,反而无谓地增加了企业融资困扰,影响了企业的公平发展权。无论是从资金融出方还是融入方观察,公司组织形态都不是配置融资权利的核心要素,融资权利的配置应当交给投资者,主要根据是否有"合适的项目"去判断。现行的企业改制发行方案,无疑在一定程度上隐藏了企业真实状况,极易推动形成"融资骗局"。因此,应当修改《公司法》、《证券法》相关规定,摒弃改制上市的习规,让有限公司乃至合伙企业等各种企业组织形式可以直接公开发行上市,在公开发行成功之后,直接变更/转换为股份公司。根据"好项目",而非"好的公司组织形态"配置融资权利,可以节省企业融资成本,加快融资过程,公平地实现"企业的发展权"。

试析清末汉冶萍公司股份制的建构和运作(1908-1911)

清末,汉冶萍公司采用了股份制的企业制度,适应了当时企业制度发展的潮流,有着历史进步意义。但考察公司章程所建构的公司法人治理结构、企业招股活动及公司法人治理结构的具体运作发现,其股份制背离了西方股份制的本质特征和精髓,实际上构建起盛宣怀对企业的专权。

股份制-医院集团发展的必由之路

目前的医院集团 ,由于产权关系不明晰 ,出现了医院集团缺乏凝聚力 ,发展后劲不足 ,内部管理体制不规范等一些问题。文章认为 ,对医院集团进行股份制改造是解决问题的有效手段之一。理由是 :能理顺医院集团的产权关系 ,协调各方面的利益 ;能增强医院集团的凝聚力 ,壮大医院集团的实力等等。进行股份制改造 。

上市全国性股份制商业银行信用风险度量--基于KMV模型

现阶段,我国正面临复杂多变的国内外形势,处于防范化解重大风险、推动实体经济发展的关键时期。发展实体经济离不开金融支持,防范化解重大风险,关键是防范金融风险,信用风险是其中最主要最突出的一类。通过整理我国8家上市全国性股份制商业银行2011~2021年的数据,运用KMV模型测算违约距离与违约概率,对8家银行进行信用风险度量,发现其信用风险整体偏高、波动较大,且对外界影响因素敏感度各异。因此,需从外部政策和内部管理两方面入手,降低股份制商业银行的信用风险,筑牢安全底线。

上市公司信息披露质量对股价极端波动的影响研究

本文以2017—2021年深圳证券交易所A股上市公司为样本,运用联合泊松混合模型,从暴涨和暴跌两个角度探究信息披露质量对股价极端波动的影响情况。研究发现,二者之间存在显著的负相关性,并且当股票价格受信息披露质量的影响出现极端波动时,相对于暴涨,出现暴跌的风险更高。此外,本文还基于联合泊松混合模型中的随机效应,探究了信息披露质量对股价极端波动影响在不同行业之间的差异。通过分析这种差异性,选择适合的股票来构建投资组合,能够帮助不同类型的投资者选择相应投资策略,实现更有效的风险管理。

农村股份经济合作社治理分析与展望--以北京大兴为例

为了深化产权制度改革,促进农村股份经济合作社发展,基于现有资料和实地调研,分析北京大兴区股份经济合作社的治理结构、治理机制和治理模式的现状。结果表明,大兴区股份经济合作社经过多年发展,在治理方面有了一定的创新和提升,但仍然面临着内外部组织机构不健全、管理缺乏民主、财务监督不完善、治理模式不够丰富等问题。未来,需要不断健全内外部组织保障、明晰政府和股份经济合作社的权责职能、加强内部权利的制衡和监督、创新治理模式、提高股份经济合作社发展活力等。

农村集体产权制度改革的实践分析与对策建议--以山东省邹城市大束镇时枣行村为例

山东省邹城市大束镇时枣行村通过改革试点,率先完成了股份合作制改革,先后成立了旅游、劳务与特色种植合作社,实现了集体经济的发展。尽管改革成效显著但仍存在一些问题,如集体股权设置不够规范、成员的股份权能未充分实现,集体经济的实现形式缺乏创新等。针对问题提出相应的对策建议:从全国层面来看,要加快对农村集体经济组织的立法,及时制定相应的政策法规保障农民的财产权益;从地方层面来看,要合理规范集体经济组织的股权设置,形成有效激励机制,广泛带动群众探索创新农村新型集体经济的实现形式,进而为改革的深入推进带来更大的原生动力。

农村“三产”融合紧密型利益联结:主要模式与机制构建

农村“三产”融合是实现产业兴旺的关键路径,完善利益联结机制是农村“三产”融合发展的关键。当前农村“三产”融合典型利益联结模式主要有以合同为纽带的契约型、以合作社为中介的合作式、以要素融合为特征的股权制三种模式。现有模式不能有效兼顾农村“三产”融合各主体的利益,尤其是小农户的利益得不到保障。河头镇股份经济合作社联合社的案例表明,股份合作社联合社在平衡农村“三产”融合各主体利益方面具有一定的合理性、科学性和先进性,是农村“三产”融合紧密型利益联接机制的有效载体。

Significance of combined detection of serum 25(OH)D3, hsa-miR-17-5p and HCV-RNA in the diagnosis of hepatitis C disease

Objective: Significance of combined detection of serum 25(OH)D3, hsa-miR-17-5p and HCV-RNA in diagnosis of hepatitis C disease. Methods: A total of 52 patients with benign ovarian tumor resection were selected from April 2016 to April 2018 in our hospital. We paid attention to the implementation of perioperative nursing intervention, and observed the prognosis and the occurrence of adverse reactions. Results: The expression of hsa-mir-17-5p in the observation group was significantly higher than that in the control group, the expression of 25(OH)D3 was lower than that in the control group, the expression of hsa-mir-17-5p in the HCV-RNA positive group was higher than that in the HCV-RNA negative group, and the expression of 25(OH) D3 was lower than that in the HCV-RNA negative group. The expression of HCV-RNA in the observation group was positively and negatively correlated with the expression of 25(OH) D3 and hsa-mir-17-5p in the 25(OH)D3 and the critical values of serum 25 (OH)D3, hsa-mir-17-5p and HCV-RNA were 24.23 ug/L, 1.89 relative expression and 1.22 × 103 IU/mL, respectively. The area of AUC detected by hsa-miR-17-5p+ 25 (OH) D3+25(OH)D3 is larger than that detected separately. Conclusion: The combined detection of serum 25(OH)D3, hsa-mir-17-5p and HCV-RNA has high diagnostic efficiency and sensitivity for hepatitis C. It is suggested that they be used in clinical practice.