Seismic identification and characterization of complex storage space oil and gas reservoirs

To predict complex reservoir spaces(with developed caves,pores,and fractures),based on the results of full-azimuth depth migration processing,we adopted reverse weighted nonlinear inversion to improve the accuracy of porous reservoir prediction.Scattering imaging three-parameter wavelet transform technology was used to accurately predict small-scale cave bodies.The joint inversion method of velocity and amplitude anisotropy was developed to improve the accuracy of small and medium-sized fracture prediction.The results of multiscale fracture modeling and characterization,interwell connectivity analysis,and connection path prediction are consistent with the production condition.Finally,based on the above prediction findings,favorable reservoir development areas were predicted.The above ideas and strategies have great application value for the efficient exploration and development of complex storage space reservoirs and the optimization of high-yield well locations.

Motion and Special Relativity in Complex Spaces

A natural extension of the Lorentz transformation to its complex version was constructed together with a parallel extension of the Minkowski M4 model for special relativity (SR) to complex C4 space-time. As the [signed] absolute values of complex coordinates of the underlying motion’s characterization in C4 one obtains a Newtonian-like type of motion whereas as the real parts of the complex motion’s description and of the complex Lorentz transformation, all the SR theory as modeled by M4 real space-time can be recovered. This means all the SR theory is preserved in the real subspace M4 of the space-time C4 while becoming simpler and clearer in the new complex model’s framework. Since velocities in the complex model can be determined geometrically, with no primary use of time, time turns out to be definable within the equivalent theory of the reduced complex C4 model to the C3 “para-space” model. That procedure allows us to separate time from the (para)space and consider all the SR theory as a theory of C3 alone. On the other hand, the complex time defined within the C3 theory is interpreted and modeled by the single separate C1 complex plane. The possibility for application of the C3 model to quantum mechanics is suggested. As such, the model C3 seems to have unifying abilities for application to different physical theories.

THE FEKETE-SZEG?INEQUALITY AND SUCCESSIVE COEFFICIENTS DIFFERENCE FOR A SUBCLASS OF CLOSE-TO-STARLIKE MAPPINGS IN COMPLEX BANACH SPACES

Let C be the familiar class of normalized close-to-convex functions in the unit disk.In[17],Koepf demonstrated that,as to a function■in the class C,■By applying this inequality,it can be proven that‖a3|-|a2‖≤1 for close-to-convex functions.Now we generalized the above conclusions to a subclass of close-to-starlike mappings defined on the unit ball of a complex Banach space.

An experimental study on fire characteristics of urban complex underground space based on BIM

Compared with the space on the ground,if there is a fire in the urban complex underground space,the loss will be greatly harmful.In addition,the complex underground space is usually connected with other large space areas and densely populated.Once a fire occurs in the complex underground space,it will cause huge property losses and casualties.In order to reduce the risk of fire,it is necessary to deeply understand the development rules and characteristics of fire in the complex underground space of the city.This article has mainly carried on the following work:(I)A particularly complex model of the multi‐storey subway station was built.On this basis,three groups of comparative experiments were conducted to study the effects of fire power,fire location and smoke control system on fire development,and the conclusion that fire location is the most important factor for fire development was obtained;(II)In order to explore the entire space fire and the local space fire,CFD(Computational Fluid Dynamics)is used to build a large‐size fire model and a small‐size fire model respectively;(III)Multiple detector data as temperature slices were built,and it is expected to make full use of the simulation data to deduce the important index of fire location in the early stage of fire.All of the works in this paper will provide reference experimental data for the prevention and firefighting of a sudden fire in the complex underground space.

Survivability Mechanisms of Complex Computer Systems Based on Common Information Space

The survivability of computer systems should be guaranteed in order to improve its operation efficiency,especially for the efficiency of its critical functions.This paper proposes a decentralized mechanism based on Software-Defined Architecture(SDA).The concepts of critical functions and critical states are defined,and then,the critical functional parameters of the target system are collected and analyzed.Experiments based on the analysis results are performed for reconfiguring the implementations of the whole system.A formal model is presented for analyzing and improving the survivability of the system,and the problem investigated in this paper is reduced to an optimization problem for increasing the system survival time.

SLANT IMMERSIONS OF COMPLEX SPACE FORMS AND CHEN'S INEQUALITY

A submanifold in a complex space form is called slant if it has constant Wirtinger angles. B. Y. Chen and Y. Tazawa proved that there do not exist minimal proper slant surfaces in CP2 and CH2. So it seems that the slant immersion has some interesting properties. The authors have great interest to consider slant immersions satisfying some additional conditions, such as unfull first normal bundles or Chen’s equality holding. They prove that there do not exist n-dimensional Kaehlerian slant immersions in CPn and CHn with unfull first normal bundles. Next, it is seen that every Kaehlerian slant submanifold satisfying an equality of Chen is minimal which is similar to that of Lagrangian immersions. But in contrast, it is shown that a large class of slant immersions do not exist thoroughly. Finally, they give an application of Chen’s inequality to general slant immersions in a complex projective space, which generalizes a result of Chen.

Some remarks on pseudo-umbilical totally real submanifolds in a complex projective space

This paper studies the relationship between the pseudo-umbilical totally real submanifolds and the minimal totally real submanifolds in a complex projective space. Two theo- rems which claim that some types of pseudo-umbilical totally real submanifolds must be minimal submanifolds are proved.

One Roper-Suffridge Extension Operator in Complex Banach Spaces

In this paper, by the definition of almost spirallike mappings of type β and order α and the geometric property of the spirallike mapping of type β, we prove that the generalized Roper-Suffridge extension operator preserves almost spirallikeness of type β and order α in complex Banach spaces. Key words：

B-Implicit Contractive Conditions and Unique（Common） Fixed Points on Complex Valued Metric Spaces

A class B of complex functions is introduced and several existence theorems of unique(common) fixed points for mappings satisfying a B-implicit contraction are presented.Moreover, the existence results of common fixed points for two mappings on a nonempty set with two complex valued metrics are provided. Our outcomes generalize and improve some known results, especially, for instance, Banach contraction principle, Chatterjea-type fixed point theorem and the corresponding fixed point theorems.

THE MAIN INVARIANTS OF A COMPLEX FINSLER SPACE

In this paper we extend the results obtained in [3], where are investigated the general settings of the two-dimensional complex Finsler manifolds, with respect to a local complex Berwahl frame. The geometry of such manifolds is controlled by three real invari- ants which live on T＇M： two horizontal curvature invariants K and W and one vertical curvature invariant I. By means of these invariants are defined both the horizontal and the vertical holomorphic sectional curvatures. The complex Landsberg and Berwald spaces are of particular into, rest. Complex Berwald spaces coincide with K/ihler spaces, in the two - dimensional case, We establish the necessary and sufficient condition under which K is a constant and we obtain a characterization for the Kghler purely Hermitian spaces by the fact K = W=constant and I = 0. For the class of complex Berwald spaces we have K =W = 0. Finally, a classitication of two-dimensional complex Finsler spaces for which the horizontal curvature satisfies a special property is obtained.

RIGIDITY THEOREMS OF COMPLETE K?HLER-EINSTEIN MANIFOLDS AND COMPLEX SPACE FORMS

We concentrate on using the traceless Ricci tensor and the Bochner curvature tensor to study the rigidity problems for complete K?hler manifolds. We derive some elliptic differential inequalities from Weitzenb?ck formulas for the traceless Ricci tensor of K?hler manifolds with constant scalar curvature and the Bochner tensor of K?hler-Einstein manifolds respectively. Using elliptic estimates and maximum principle, several L^p and L~∞ pinching results are established to characterize K?hler-Einstein manifolds among K?hler manifolds with constant scalar curvature and complex space forms among K?hler-Einstein manifolds.Our results can be regarded as a complex analogues to the rigidity results for Riemannian manifolds. Moreover, our main results especially establish the rigidity theorems for complete noncompact K?hler manifolds and noncompact K?hler-Einstein manifolds under some pointwise pinching conditions or global integral pinching conditions. To the best of our knowledge,these kinds of results have not been reported.

2-Harmonic Totally Real Submanifolds in a Complex Projective Space

In this paper, we discuss the relations between the 2-harmornic totally real submsnifold and the minimal totall real submanifold in the complex protective spsace, and obtain the pinching conductions for the second fundamental form and the Rieci curature of the 2-harmornic totally real submanifold in the complex projective space.

A Note on Totally Real Riemannian Foliations with Parallelized Mean Curvature Vectors in a Complex Projective Space

We discussed a totally real Riemannian foliations with parallel mean curvature on a complex projective space.We carried out the divergence of a vector field on it and obtained a formula of Simons’type.

Points of Coincidence and Common Fixed Points for Ⅱ-Expansive Mappings on Complex Valued Metric Spaces

Abstract. We use the two mappings satisfying II-expansive conditions on complex valued metric spaces to construct the convergent sequences and prove that the unique limit of the sequences is the point of coincidence or common fixed point of the two mappings. Also, we discuss the uniqueness of points of coincidence or common fixed points and give the existence theorems of unique fixed points. The obtained results generalize and improve the corresponding conclusions in references.

ON THE DECOMPOSITION OF COMPLEX VECTOR SPACES AND THE JORDAN CANONICAL FORM OF COMPLEX LINEAR TRANSFORMATIONS

New objects characterizing the structure of complex linear transformations areintroduced. These new objects yield a new result for the decomposition of complexvector spaces relative to complex lrnear transformations and provide all Jordan basesby which the Jordan canonical form is constructed. Accordingly, they can result in thecelebrated Jordan theorem and the third decomposition theorem of space directly. and,moreover, they can give a new deep insight into the exquisite and subtle structure ofthe Jordan form. The latter indicates that the Jordan canonical form of a complexlinear transformation is an invariant structure associated with double arbitrary. choices.

未来关怀:时空互渗与教育范式转换

未来研究关乎人类的共同命运。未来学已经成为一个独特的交叉学科领域。从教育的角度看未来和从未来的角度看教育,既是未来学应有的视角,也是教育学应有的视角。人类共同的未来是多主体参与的因文化不同而呈现出不同特点的多样化的未来。未来是复杂的时空互渗的动力系统。差异性和多样性是世界的根本特征。人类命运共同体是尊重差异和多样性的共同体。教育在人类命运共同体建构中具有重要的作用。面向未来的教育需要在未来关怀的视野下推动教育范式的转变。在一般意义上,教育范式的转换包括从学校教育到泛在教育、从过去导向到时空互渗、从技术主导到意义建构、从还原主义到复杂思维、从结构决定到自主选择。未来关怀的教育不是为了自证预言的实现,而是影响未来的行动教育,提升未来素养是未来关怀教育的重要目标。

基于深度强化学习的航天器功率信号复合网络优化算法

为了实现航天器电源系统的灵活高效并网,最大化有限能量的利用,提出一种基于深度强化学习(deep reinforcement learning,DRL)的功率传输与信号传输复合网络拓扑优化模型,并使用知识蒸馏原理的多种可解释组件模型对优化过程进行剖析。首先,分析在轨运行阶段航天器母线电压调节控制域变换规律,并结合节点传播性参数,建立功率传输与信号通信的复合网络拓扑模型。然后,利用A3C(asynchronous advantage actor-critic)算法,对信号传输网络路由分布、拓扑结构等方面潜在的运行可靠性风险进行自适应性优化。最后,结合多种可解释组件对已训练的DRL模型进行知识蒸馏,形成一种可解释的量化分析方法。所提方法可以指导空间电源在随机阴影影响下选择最佳并网方案,并为更高任务要求和复杂环境下空间电源控制器设计提供理论支持。

城市地下空间地质安全多级变模糊变权综合评价法

城市地下空间地质安全评价可为城市地下空间规划和工程建设提供重要决策支持。城市地下空间地质安全评价问题是一个十分复杂的系统综合评价问题。目前常用的评价方法主要有层次分析法、模糊综合评价法、灰色关联度法、可拓物元法等,模糊综合评价法是其中应用效果最好、最广泛的方法。但目前常用的评价方法都属于常权综合评价法,且评价模型普遍采用加权平均模型,导致评价结果易受平均效应影响,并不适合复杂的非线性系统评价。将模糊集理论、可变模糊集理论及变权理论三者融合,提出了多级变模糊变权综合评价法,该方法的综合评价模型更加完善,适应能力更强。在理论上,通过修改综合评价模型,所提出的算法就可以退化为常用的模糊类方法,如模糊综合评价法、模糊变权综合评价法、可变模糊综合评价法。以青岛市红岛区的城市地下空间地质安全性评价为例,通过对比分析4种不同评价方法的评价结果,验证了所提方法的先进性及应用效果。多级变模糊变权综合评价法是一种多理论集成的综合评价方法。与各种常用的综合评价方法相比,该方法更加适用于城市地下空间地质安全评价及其他复杂系统的综合评价。

城市商业综合体非机动车交通空间优化

国家“双碳”目标要求加强以生活圈为单元的短距离低碳出行引导。城市商业综合体是5~15 min城市生活圈短距离出行的热点区域,文章意在为优化受到电动自行车、电动摩托车(简称电动车)保有量快速增长冲击的综合体非机动车交通空间组织提供系统性方案。通过现场观测记录和访谈,分析居民电动车、自行车出行目的和需求,揭示其出行的时空特征,剖析非机动车交通空间组织中存在的困境和挑战,提出运用统筹协作理念,探索规模配置—规划布局—组织管理等的非机动车交通组织系统优化策略。文章将有效解决长期被忽视的非机动车交通空间组织痛点和难点,为城市其他类型公共空间非机动车交通空间组织提供借鉴。

空间站大规模复杂控制软件基于数据池的软件框架设计

针对复杂航天任务中控制软件不断增长的规模和复杂度带来的问题,对国外先进航天航空机构软件架构设计经验和最佳实践进行了调研,基于此对空间站大规模复杂航天器控制软件的通用框架设计进行研究,提出了一种基于数据池的软件框架设计方法,解决了空间站大规模复杂控制软件多舱段多机多总线资源管理和可扩展性的难题,实现了软件复杂的底层通信与上层应用处理之间的数据隔离和解耦,有效提高了软件复用率和可扩展能力。