基于PATH-STIRPAT模型的城镇化演进边际资源环境胁迫效应测度及趋势预测——以安徽省为例

探索城镇化演进的边际资源环境胁迫效应,对制定城镇化与资源环境保护协调融合的政策具有启示意义.以安徽省为例,采用通径分析与STIRPAT模型组合研究方法,揭示了城镇化演进对资源环境胁迫的直接与间接弹性,依据城镇化发展规划,就未来城镇化演进边际资源环境胁迫效应进行了预测,结果表明:1安徽省资源环境压力指数由2000年的0.043196跃升至2013年的0.806663;2城镇化对资源环境边际胁迫的直接弹性系数为0.000153,间接弹性系数为0.0024386,其中,外国直接投资(FDI)、固定资产投资、经济增长、产业结构、人均消费水平、人口的间接弹性系数分别为0.00107、0.000912、0.000532、0.00012、0.0000906、0.00003,其技术因素具有明显的负向舒解效应,间接弹性系数为-0.000316;32020年、2030年城镇化发展对资源环境胁迫直接弹性系数将分别增至0.003242、0.007078、间接弹性系数将高达0.051674、0.112810,基于研究结果,从以新常态理念顶层设计城镇化建设路径等5方面提出了相应的政策建议.

Adaptive subsequence adjustment with evolutionary asymmetric path-relinking for TDRSS scheduling

Due to the limited transmission resources for data relay in the tracking and data relay satellite system （TDRSS）, there are many job requirements in busy days which will be discarded in the conventional job scheduling model. Therefore, the improvement of scheduling efficiency in the TDRSS can not only help to increase the resource utilities, but also to reduce the scheduling failure ratio. A model of nonhomogeneous parallel machines scheduling problems with time window （NPM-TW） is firstly built up for the TDRSS, considering the distinct features of the variable preparation time and the nonhomogeneous transmission rates for different types of antennas on each tracking and data relay satellite （TDRS）. Then, an adaptive subsequence adjustment （ASA） framework with evolutionary asymmetric path-relinking （EvAPR） is proposed to solve this problem, in which an asymmetric progressive crossover operation is involved to overcome the local optima by the conventional job inserting methods. The numerical results show that, compared with the classical greedy randomized adaptive search procedure （GRASP） algorithm, the scheduling failure ratio of jobs can be reduced over 11% on average by the proposed ASA with EvAPR.

资源型省份碳排放驱动力分析——基于PATH-STIRPAT模型的实证研究

本文选取山西省作为资源型省份的代表,运用PATH-STIRPAT模型,基于1990—2010年的时间序列数据,实证分析资源型省份碳排放的驱动力。结果表明:人口、富裕度、产业结构、能源效率、城市化是资源型省份碳排放的主要影响因素。

Virtual Simulation System with Path-following Control for Lunar Rovers Moving on Rough Terrain

Virtual simulation technology is of great importance for the teleoperation of lunar rovers during the exploration phase, as well as the design of locomotion systems, performance evaluation, and control strategy verification during the R&D phase. The currently used simulation methods for lunar rovers have several disadvantages such as poor fidelity for wheel-soil interaction mechanics, difficulty in simulating rough terrains, and high complexity making it difficult to realize mobility control in simulation systems. This paper presents an approach for the construction of a virtual simulation system that integrates the features of 3D modeling, wheel-soil interaction mechanics, dynamics analysis, mobility control, and visualization for lunar rovers. Wheel-soil interaction experiments are carried out to test the forces and moments acted on a lunar rover’s wheel by the soil with a vertical load of 80 N and slip ratios of 0, 0.03, 0.05, 0.1, 0.2, 0.3, 0.4, and 0.6. The experimental results are referenced in order to set the parameters’ values for the PAC2002 tire model of the ADAMS/Tire module. In addition, the rough lunar terrain is simulated with 3DS Max software after analyzing its characteristics, and a data-transfer program is developed with Matlab to simulate the 3D reappearance of a lunar environment in ADAMS. The 3D model of a lunar rover is developed by using Pro/E software and is then imported into ADAMS. Finally, a virtual simulation system for lunar rovers is developed. A path-following control strategy based on slip compensation for a six-wheeled lunar rover prototype is researched. The controller is implemented by using Matlab/Simulink to carry out joint simulations with ADAMS. The designed virtual lunar rover could follow the planned path on a rough terrain. This paper can also provide a reference scheme for virtual simulation and performance analysis of rovers moving on rough lunar terrains.

Maximum Inner Product Method for Extracting the Path-Loss Parameters in Primary Transformer Substations

In order to deploy short-range wireless communication devices in the primary transformer substation, a Maximum Inner Product(MIP) Method is proposed to extract the path-loss parameters in 110 kV and 220 kV primary transformer substations. The maximum inner product of the testing data is calculated to find out the loss index n and the standard deviation σ, and then the pathloss models can be set up. By comparing the MIP with Minimum Mean Square estimation(MMSE) and Cumulative Sum(CUSUM), MIP can match the measured values best. In order to apply the MIP path-loss model, under the initial signal to noise ratio(SNR) at 5 dB and 10 dB, a ZigBee simulation system is constructed to validate the situation that bit error rate(BER) varies with distance. And the ZigBee devices with 5 units are tested in a 220 kV primary transformer substation. The result of the test proves that the path-loss model is accurate.

The Path-Positive Property on the Products of Graphs

本文所讨论的积图是图的笛卡尔积，图的张量积，图的逻辑积和图的强直积四种积图．证明了：①如果Ｇ１和Ｇ２都是连通图，则积图中笛卡尔积，逻辑积和强直积都是道路正图．②图的张量积是道路正图的是图Ｇ１和Ｇ２是一个连通图，Ｇ１［或Ｇ２］有一个奇圈，且ｍａｘ｛λ１μ１，λｎμｍ｝≥２。

CALCULATION FOR PATH-DOMAIN INDEPENDENT J INTEGRAL WITH ELASTO-VISCOPLASTIC CONSISTENT TANGENT OPERATOR CONCEPT-BASED BOUNDARY ELEMENT METHODS

This paper presents an elasto-viscoplastic consistent tangent operator (CTO) based boundary element formulation, and application for calculation of path-domain independentJ integrals (extension of the classicalJ integrals) in nonlinear crack analysis. When viscoplastic deformation happens, the effective stresses around the crack tip in the nonlinear region is allowed to exceed the loading surface, and the pure plastic theory is not suitable for this situation. The concept of consistency employed in the solution of increment viscoplastic problem, plays a crucial role in preserving the quadratic rate asymptotic convergence of iteractive schemes based on Newton's method. Therefore, this paper investigates the viscoplastic crack problem, and presents an implicit viscoplastic algorithm using the CTO concept in a boundary element framework for path-domain independentJ integrals. Applications are presented with two numerical examples for viscoplastic crack problems andJ integrals.

A Multi-Hop Dynamic Path-Selection (MHDP) Algorithm for the Augmented Lifetime of Wireless Sensor Networks

In Wireless Sensor Networks (WSN), the lifetime of sensors is the crucial issue. Numerous schemes are proposed to augment the life time of sensors based on the wide range of parameters. In majority of the cases, the center of attraction will be the nodes’ lifetime enhancement and routing. In the scenario of cluster based WSN, multi-hop mode of communication reduces the communication cast by increasing average delay and also increases the routing overhead. In this proposed scheme, two ideas are introduced to overcome the delay and routing overhead. To achieve the higher degree in the lifetime of the nodes, the residual energy (remaining energy) of the nodes for multi-hop node choice is taken into consideration first. Then the modification in the routing protocol is evolved (Multi-Hop Dynamic Path-Selection Algorithm—MHDP). A dynamic path updating is initiated in frequent interval based on nodes residual energy to avoid the data loss due to path extrication and also to avoid the early dying of nodes due to elevation of data forwarding. The proposed method improves network’s lifetime significantly. The diminution in the average delay and increment in the lifetime of network are also accomplished. The MHDP offers 50% delay lesser than clustering. The average residual energy is 20% higher than clustering and 10% higher than multi-hop clustering. The proposed method improves network lifetime by 40% than clustering and 30% than multi-hop clustering which is considerably much better than the preceding methods.

Path-tracking Control of a Tractor-aircraft System

一台飞机拖拉机作为一种重要海洋的运输和支持设备起一个重要作用。它的对学习必要它改进操作效率的控制并且调遣的稳定性。拖拉机飞机系统的一个虚拟原型模型在这份报纸基于有 Lagrange mutipliers 的第一种类型的 Lagranges 方程被建立。根据拖引的特征，用模糊逻辑理论的一个追踪路径的控制器被设计。方向控制此处通过一条补偿追踪途径被执行。交互合作模拟被执行验证追踪路径的行为在靠近环。模拟结果显示拖拉机在扁平的地面上精确跟随了参考书功课。

Research on stereo vision path-planning algorithms for mobile robots autonomous navigation

Using stereo vision for autonomous mobile robot path-planning is a hot technology.The environment mapping and path-planning algorithms were introduced,and they were applied in the autonomous mobile robot experiment platform.Through experiments in the robot platform,the effectiveness of these algorithms was verified.

Path-tracking Control of Underactuated Ships Under Tracking Error Constraints

这份报纸论述在经常或慢的变化时间的海负担下面强迫 underactuated 轮船 asymptotically 追踪一条 parameterized 参考书路径的新控制器的一个建设性的图案，那总是从轮船保证距离到参考书路径在指定价值以内。控制设计基于一个全球指数的骚乱观察员，到一种几乎球形的形式的轮船动力学的转变，在一个修理地球的框架的追踪的错误的解释，动态变量的介绍补偿参考书路径产生的松驰，p乘可辨的步功能，并且 backstepping 和 Lyapunovs 指导方法。建议结果的有效性通过模拟被说明。

Generalized path-integral solution and coherent states of the harmonic oscillator in D-dimensions

We construct a general form of propagator in arbitrary dimensions and give an exact wavefunction of a time- dependent forced harmonic oscillator in D（D ≥ 1） dimensions. The coherent states, defined as the eigenstates of annihilation operator, of the D-dimensional harmonic oscillator are derived. These coherent states correspond to the minimum uncertainty states and the relation between them is investigated.

Existence of Solutions to Path-Dependent Kinetic Equations and Related Forward-Backward Systems

This paper is devoted to path-dependent kinetics equations arising, in particular, from the analysis of the coupled backward-forward systems of equations of mean field games. We present local well-posedness, global existence and some regularity results for these equations.

社会支持理论视域下中国式现代化体育发展的现实之困与纾解之策

中国式现代化体育是为满足全体人民体育需要,从传统体育向现代体育发展转向的具有中国特色的社会主义体育现代化。现代化已成为我国体育事业发展新诉求、新目标、新征程,加快推进中国式现代化体育发展是促进中国式现代化的必然选择。运用文献资料法与逻辑分析法,基于社会支持系统四要素“主体—客体—内容—手段”为逻辑主线,分析中国式现代化体育发展的现实困境。研究认为:主体供给乏力制约中国式现代化体育支持网络的形成,客体动力不足制约中国式现代化体育的普遍参与,支持内容贫乏阻滞中国式现代化体育的全面发展,支持手段有限阻碍中国式现代化体育的社会联结。实现多元主体支持,为中国式现代化体育供给提供有效保障;提升客体参与动力,为中国式现代化体育参与提供内生动力;丰富内容体系构建,为中国式现代化体育发展创造良好条件;改善社会支持手段,为中国式现代化体育发展提供关键支撑等纾解策略。

中国式现代化背景下的乡村旅游:功能、短板与优化路径

全面建设社会主义现代化国家,最艰巨最繁重的任务仍然在农村.作为乡村振兴的重要抓手和可行路径,乡村旅游在促进农业农村全面进步和农民全面发展等方面具有重要作用.文章基于中国式现代化的时代背景和发展要求,系统分析乡村旅游的潜在功能、发展短板和优化路径.研究认为:乡村旅游应在推动乡村高质量发展、保障农民主体地位、丰富人民精神世界、增进乡村民生福祉和推动乡村绿色发展等方面发挥重要作用.然而,当前乡村旅游发展实践中仍然存在同质化问题严重、农民主体地位不突出、文化保护利用不充分、利益共享机制有待优化、生态环境保护面临挑战等短板问题.因此,未来亟需从推动产业融合创新、培育多元市场主体、弘扬特色乡土文化、保障村民合法权益、改善乡村生态环境等方面加以优化.

数字中国背景下城市韧性提升路径研究——基于模糊集定性比较分析(fsQCA)

增强城市韧性既是城市提升恢复能力和适应能力的重要保障,也是城市高质量发展的重要支撑。目前“数字中国”建设步伐不断加快,城市数字化对城市新形态的塑造具有重要影响作用,进而深度赋能提升城市韧性。该文运用组态思维和fsQCA方法对我国45个城市研究影响因素的协同联动机制,最后得出城市韧性的驱动路径。研究发现:(1)单一条件变量并不是城市韧性的必要条件;(2)实现高韧性城市的路径有3条,即数字经济与数字基础设施主导型、数字经济与数字政府主导型、“四轮”驱动型;(3)数字经济和数字政府两个条件变量对城市韧性具有更为重要的作用。因此,韧性较低的城市可以依据自身资源禀赋,因城施策,选择适宜的韧性提升路径,从而有效地提升城市韧性。

中国式现代化背景下的中国乡镇实践与发展路径探析

党的二十大报告指出,我国已经成功推进和拓展了中国式现代化。乡镇作为中国城镇体系中最基本的地域综合体,其发展逐渐以满足人民生活为立足点,在中国现代化进程中展开了深刻的实践。中国式现代化的发展目标给全面推进中国乡镇发展提出了新要求和新挑战,全力推进乡镇的中国式现代化发展,必须认清中国乡镇在新时代发展中的地位,深入分析中国乡镇在整个现代化进程中的发展特征和现实基础,以探寻乡镇实现现代化发展的新路径。基于此,文章提出乡镇现代化是推进中国式现代化的基础组成,乡镇是建设新型城镇化的重要载体,是促进城乡融合的重要支撑,是实现乡村振兴的战略引擎。进一步,文章从乡镇的历史发展和现实条件出发,论述了乡镇在经济活动发展区、人口流动集聚区、历史文化传承区和宜居生活典范区建设上具有坚实的基础。在经济发展上,近代以来乡镇经济活动功能已初具雏形,乡镇企业的兴起促进了乡镇工业的发展,继而推动乡镇承担更多的经济活动;在人口流动上,城—镇—乡之间的人口流动更加频繁,随着乡村振兴和镇的发展,乡镇对流动人口的吸引力不断增强,乡镇的人口集聚作用更加突出;在历史文化上,名镇、名村承载着不同历史时期的文化价值,从中国历史文化名镇到中国特色景观旅游名镇,体现出乡镇对历史文化的传承和特色景观的营造;在宜居生活上,建设美丽宜居乡镇是建设美丽中国的重要组成部分,乡镇在产业体系培育、基础设施建设、公共服务配套、生态环境治理上都取得了一定的成效。针对中国乡镇发展的现实基础,文章提出推动中国乡镇现代化发展的路径和举措。在坚持城镇化和农业农村现代化的基础上,要从“四高理念”出发做实中国乡镇现代化发展的基础,以扩大对外开放,实现高水平开放;以促进经济要素活力,助力高质量发展;以提升公共服务质量,打造高品质生活;以创新社会治理模式,探索高效能治理,以期为全面提升中国乡镇现代化发展质量、制定精准的乡镇发展政策提供决策参考。

大国竞争背景下新质生产力形成的理论逻辑与实现路径

新质生产力是习近平总书记基于大国竞争背景下我国发展阶段、发展环境、发展条件变化,作出的具有根本性、全局性、长远性的重大战略判断。在新一代信息技术加速突破应用、先进制造技术加速产业转型的新发展阶段,形成新质生产力既是构建新发展格局、推动高质量发展的必然要求,也是我国建设现代化经济体系的关键动能,关系我国在未来发展和国际竞争中赢得战略主动。新质生产力的内涵是以引领国际经济体系变革、重塑现代化产业体系、提升企业核心竞争力为目的,从传统生产力向新质生产力的演化升级应该包含国际竞争、国家优势和企业发展三个层面整个生产范式的转变。文章以马克思主义政治经济学、习近平经济思想、习近平生态文明思想为理论支撑,提出“新质生产力”的理论构建包括三个维度:一是微观载体——打造世界一流企业;二是中观治理——提升国际竞争优势;三是宏观发展——构建人类命运共同体。文章将新质生产力形成的理论逻辑和实践路径融入中国当前的发展战略中,从转变企业发展范式、重塑现代化产业体系和建设新的全球治理体系三个方面提出形成新质生产力的改革路径,三条路径相辅相成、协同发力,共同为新质生产力的形成注入活力,使得生产力发展更好地服务于中国高质量发展的战略定位。