Research on Coordinated Development and Optimization of Distribution Networks at All Levels in Distributed Power Energy Engineering

The uncertainty of distributed generation energy has dramatically challenged the coordinated development of distribution networks at all levels.This paper focuses on the multi-time-scale regulation model of distributed generation energy under normal conditions.The simulation results of the example verify the self-optimization characteristics and the effectiveness of real-time dispatching of the distribution network control technology at all levels under multiple time scales.

Prospect Conceiving of Joint Research and Development of Shale Gas and Coalbed Methane in China

Inspired by successful development of shale gas in USA and influenced by hydrocarbon resources shortage currently, China has strengthened shale gas research and accelerated its exploration process. In order to enrich coalbed methane (CBM) and shale gas geological theory and promote their development process, this paper compared shale gas with CBM in accumulation, distribution, reservoir and production. It expatiated on the background and significance of the combined research and development, and analyzed the geological foundation and future prospects. Our investigation demonstrated that there are many sets of coal-bearing strata in Shanxi formation of Permian system in Ordos in North China, Longtan formation of Upper Permian and Xujiahe formation of Upper Triassic in Southern Yangtze region, Xishanyao formation of Middle Jurassic in Turpan-Hami Basin and Junggar Basin in Northwest China, and Shahezi formation of Cretaceous in Songliao Basin in northeast China. In these regions, shales which are interbeded with coal seams have the characters of big thickness, continuous distribution, high content of organic matter, good parent material and high maturity, accord with the basic geological conditions to format shale gas and CBM reservoir and composite gas reservoir, thus form appropriate regions and layers to carry out joint research and exploration with good prospects for development.

Development unit division and favorable area evaluation for joint mining coalbed methane

Based on the productivity equation of coalbed methane (CBM) well, considering the impact of coal reservoir reformability on gas well productivity, the main production layer optimization index in the “three-step method” of optimal combination of production layers is corrected, and then the CBM production layer potential index is introduced to evaluate favorable areas for commingled multi-coal seam production. Through analysis of the key parameters of coal reservoirs affecting the CBM productivity index, a development unit division method for areas with multi-coal seams is established, and a quantitative grading index system is proposed. On this basis, the evaluation process of CBM development favorable area is developed: the mature 3-D modeling technology is used to characterize the reservoir physical properties of multi-coal seams in full-scale;the production layer potential index of each grid is calculated, and the production layer potential index contour under single-layer or commingled multi-layer production are plotted;according to the distribution of the contour of production layer potential index, the quantitative index of CBM development unit is adopted to outline the grade I, II, III coal reservoir distribution areas, and thus to pick out the favorable development areas. The practical application in the Yuwang block of Laochang in Yunnan proved that the favorable area evaluation process proposed can effectively overcome the defects of selecting favorable development areas only relying on evaluation results of a major coal seam pay, and enhance the accuracy of the evaluation results, meeting the requirements of selecting favorable areas for multi-coal seam commingled CBM production.

Relationship between joint development in rock and coal seams in the southeastern margin of the Ordos basin

To predict joint development characteristics of coal seams, joint characteristics of rock seams from 88field stations were observed and comparisons were made between joint characteristics of coal and rock seams at 10 coal outcrops. Additionally, detailed joint measurements of underground coal seams were taken at two coal mines. This study investigated the effects of seam thickness, lithology, and structure on joint development and established the relationship between joint development of coal and rock seams, which allowed predictions of predominant joint densities for the No.5 coal seam in the southeastern margin of the Ordos basin. The results show that outcrop and underground coal seams exhibit the same joint systems as rock seams. The joints are mainly upright. Predominant joints strike 55° on average, followed by joints striking 320°. The joint density of the coal seam is 18.7–22.5 times that of the sandstone seam at the same thickness. The predominant joint density of the No.5 coal seam, controlled by the structure, is 4–20 joints per meter. Joint densities exhibit high values at intersecting areas of faults and folds and decrease values in structurally stable areas. The permeability increases exponentially with increasing density of the predominant joints.

Taking Coordinated and Joint Action to Promote the Green Development of the Economy and the Society

The green development is the latest economic and social development philosophy that is proposed to cope with the gradual deterioration of current ecological environment, and it aims to achieve the comprehensive greenization of the economy and the society. To promote the green development of the economy and the society, we must look far and aim high, and we must take a holistic approach, coordinate the strategic measures in the fields of the economy, the politics, the culture, the society, the natural environment, and international cooperation, as well as emphasize the logic, the connection, and the hierarchy of different systems, then establish a synergetic mechanism of the green development so that various measures will be coordinated and brought forward to maximize the effect in the joint effort of promoting the green transformation of the economy and the society.

Regional Coordinated Development and Joint Prevention and Control for Environmental Protection in China in the New Era

The three important historical development stages of China from"standing up","getting rich"to"becoming strong"were analyzed deeply.Regional coordinated development policies and strategies have also gone through the"enlightenment stage","development stage"and"mature stage".On this basis,the problems of the coordination of China s regional coordinated development and joint prevention and control for environmental protection in the new era,as well as suggestions for the next step were further analyzed.

On the Joint Development of Tourism Economy and Culture in the Era of Big Data

This paper introduces the origin and development of tourism,the cultural connotation of tourism economy,the history of cultural tourism industry,and the strategic changes of business value and economic development in the era of big data.The strategy of economic and cultural joint development under the environment of ecological tourism is explored by developing the way of ethnic culture tourism and strengthening the interactive development of culture and economy.The competitive advantage of big data is analyzed and the importance of basic content and data collection is emphasized.In addition,the present situation of tourism market is evaluated and improved by constructing reasonable economic benefit analysis model.

Research on the Joint Development of Cities of Guangdong-Hong Kong-Macao Greater Bay Area: A Case Study of Foshan City

Promoting the construction of Guangdong-Hong Kong-Macao Greater Bay Area is a major policy decision and national strategy made by the central government of China,which significantly supports the Belt and Road Initiative and maintains the long-term prosperity for the whole country.As an important part of the Guangdong-Hong Kong-Macao Greater Bay Area,Foshan needs to find its own position and direction in order to accelerate the joint development with other cities through five measures.

JOINT EFFORTS FOR FURTHER DEVELOPMENT——Prospects for Science and Technology Cooperation between Hong Kong and the Mainland

There is a long tradition of friendly exchange and cooperation between the Chinese Academy of Sciences (CAS) and the universities in Hong Kong. In recent years, both sides have been increasingly realizing the importance of furthering their Collaboration and exchange and the cooperation has become more active, laying greater

CGWIC Subsidiary and Thailand Kasetsart University Signed MOU for HONGYAN-SAT Joint Development

On November 27,2017,under the government cooperation framework of China and Thailand,Beijing Tengyuxinwei Technology Co.,Ltd.（BTTCL）,affiliated to the China Great Wall Industry Corporation（CGWIC）,signed a MOU of‘Joint Construction of HONGYAN-SAT Constellation’with Thailand Kasetsart University（KU）.Under this MOU,

Ecological and Environmental Protection Requirements in China s Regional Coordinated Development Strategy in the New Era

Starting from the historical evolution of China s regional coordinated development policy and practice,three stages of"enlightenment stage","development stage"and"maturity stage",as well as the connotation,characteristics and content of implementing regional coordinated development strategy were analyzed.On this basis,from different aspects of industrial distribution,pollutant characteristics and regional environmental protection policy,the existing ecological and environmental protection problems in China s regional coordinated development in the new era were analyzed,and some suggestions for the next step were put forward.It is necessary to follow the"four ones"concept from the overall point of view,implement"three lines and one list"from the perspective of the width of the access red line,strengthen"joint prevention and control"from the perspective of the depth of regional regulation,deepen the"planning environmental impact assessment"from the perspective of the breadth of industrial distribution,and promote the"green-way model"from the perspective of ecological low carbon.

The Development and Application of Automotive CVJ Grease

The development trend of the CVJ (constant velocity joint) greases is briefly introduced in this paper. Based on the evaluation of various base stocks, thickeners and additives, the formulation and manufacture of the long-life CVJ grease is finalized. Bench tests and vehicle performance evaluation tests have showed that the ‘Great Wall brand’ new polyurea-based CVJ grease can meet the demand of automo- tive CVJ. This grease features an outstanding low and high temperature performance, extreme pressure, anti-corrosion and anti-rust properties equivalent to those of similar overseas greases. Compared with the traditional MoS2 containing lithium based CVJ grease, the performance of the new grease is much better.

Plan to drive high-quality development in resource-rich regions announced

China on Friday unveiled a plan to promote high-quality development in resource-rich regions during the 14th Five-Year Plan period,according to the country's top economic regulator.The new plan,jointly released by the National Development and Reform Commission,the Ministry of Finance and the Ministry of Natural Resources,requires pushing forward the high-quality development of resource-rich regions while stimulating innovation potential,improving systems and mechanisms,and enhancing weak links in people's well-being.

顾客参与产品开发阶段对旅游新产品开发绩效的影响

旅游业作为现代服务业较为活跃的组成部分,顾客参与影响到顾企相互理解的程度,包含企业对顾客需求及潜在需求的理解和顾客对企业服务的整体感受和评价。因此,顾客参与的不断交互作用能降低旅游企业新产品开发的风险,提升响旅游新产品开发绩效。信息来源型和共同开发型是两类典型的顾客参与类型。依据合肥市及华东地区182份旅游新产品开发绩效的调查数据,采用验证性因子和分层回归分析两类顾客参与不同产品开发阶段对旅游新产品开发绩效的影响。结果显示:产品开发阶段在信息来源型、共同开发型顾客参与和旅游新产品开发绩效中起中介作用。

区域职业教育与科创产业联动发展的内在逻辑、现实困境及应对策略

科创产业的跨界进阶,使智能机器成为有“智慧”的“能工巧匠”,替代人类劳动的形式日趋多样、边界日趋宽广,为强化人在技术逻辑层面的主体地位,预防大规模“技术性失业”,加快职业教育与科创产业的联动发展成为值得探讨的新路径。职业教育与科创产业联动发展主要表现为科技创新的技能化和技能升级的科技化,推动二者的联动发展,需要运用结构联动—功能联动—价值联动的系统思维,实施科技创新与技能升级双轮驱动,着力解决职业教育与科创产业目标错位、机制失衡、价值偏离的困境,全面促进区域职业教育整体布局与经济社会的和谐发展,这既是教育资源配置的理论问题,也是教育服务民生的实践问题。

美军联合全域指挥与控制的投资

阐述美军联合全域指挥与控制(JADC2)的概念内涵、当前工作内容以及未来发展方向。结合美国国防部2024财年预算请求及Govini公司研究报告,进一步介绍JADC2支出的核算方法,并系统解析美国在JADC2上的资金投入和市场情况、美军联合全域指挥与控制当前面临的挑战。当前,全球安全环境正在发生飞速变化,局部冲突时有发生,搜集、解析和传递信息以保持决策优势的能力将是主导战争胜负的关键。美国国防部提出JADC2战略,旨在构建一个在战场上可以将各部门互联互通的安全网络,以期实现所有战域之间的充分、实时的信息交换。目前美国通过技术研发、合作演习等方式在各个层面积极推动JADC2的建设,并已取得一定阶段性成果。