Metal–Organic Gel Leading to Customized Magnetic‑Coupling Engineering in Carbon Aerogels for Excellent Radar Stealth and Thermal Insulation Performances

Metal–organic gel(MOG)derived composites are promising multi-functional materials due to their alterable composition,identifiable chemical homogeneity,tunable shape,and porous structure.Herein,stable metal–organic hydrogels are prepared by regulating the complexation effect,solution polarity and curing speed.Meanwhile,collagen peptide is used to facilitate the fabrication of a porous aerogel with excellent physical properties as well as the homogeneous dispersion of magnetic particles during calcination.Subsequently,two kinds of heterometallic magnetic coupling systems are obtained through the application of Kirkendall effect.FeCo/nitrogen-doped carbon(NC)aerogel demonstrates an ultra-strong microwave absorption of−85 dB at an ultra-low loading of 5%.After reducing the time taken by atom shifting,a FeCo/Fe3O4/NC aerogel containing virus-shaped particles is obtained,which achieves an ultra-broad absorption of 7.44 GHz at an ultra-thin thickness of 1.59 mm due to the coupling effect offered by dual-soft-magnetic particles.Furthermore,both aerogels show excellent thermal insulation property,and their outstanding radar stealth performances in J-20 aircraft are confirmed by computer simulation technology.The formation mechanism of MOG is also discussed along with the thermal insulation and electromagnetic wave absorption mechanism of the aerogels,which will enable the development and application of novel and lightweight stealth coatings.

An Evaluation of the Coupling Coordination of Technological Innovation System in China’s Marine Biopharmaceutical Industry

The marine biopharmaceutical industry(MBI)has been considered as an important part of the blue economy.The high-quality development of this industry depends on the high-level coordinated development of technological innovation system(TIS).In the present study,the coupling mechanism of industrial innovation input subsystem and innovation output subsystem was analyzed for the first time.On this basis,the development level and coupling coordination level of TIS in China’s MBI during 2008-2018 were empirically evaluated with the capacity coupling coordination model.Then,the obstacle factors were diagnosed and recognized with the obstacle model.The results showed that the innovation input index fluctuated at a low level in China’s MBI.The innovation output index has basically maintained a growth trend,whereas the quality of development was not high.Although the coupling coordination level of TIS showed a positive change as mild disordered→primary coordinated→well-coordinated,the development type of innovation system has changed from the lagging output of innovation into the lagging input of innovation.Insufficient input of innovation factors remained the main obstacle to the improvement of coordination level.Based on the above analysis,suggestions were put forward from the perspectives of policy and fund guarantees to improve the coupling coordination level in China’s MBI.

Orthogonal Frequency Division Multiplexing Adaptive Technology for Multinode Users of Seawater Channel Based on Inductively Coupled Mooring Chain

As an important part of buoy-type ocean monitoring systems,the inductively coupled mooring chain solves the problem of data cotransmission through the multinode sensors that it carries,which is significant for the rapid acquisition of fish,hydrology,and other information.This paper is based on a seawater channel transmission model with a depth of 300 m and a bandwidth of 2 MHz.An orthogonal frequency division multiplexing(OFDM)technology is used to overcome the multipath effect of signal transmission on a seawater medium.The adaptive technology is integrated into the OFDM,and an improved joint subcarrier and bit power allocation algorithm is proposed.This algorithm solves the problem of dynamic subcarrier allocation during the cotransmission of underwater multinode user data in seawater channels.The results show that the algorithm complexity can be reduced by 0.18126×10^(-2)s during one complete OFDM system data transmission by the improved greedy algorithm,and a total of 216 bits are transmitted by the OFDM.The normalized channel capacity can be improved by 0.012 bit s^(-1)Hz^(-1).At the bit error ratio(BER)of 10^(-3),the BER performance can be improved by approximately 6 d B.When the numbers of users are 4 and 8,the improved algorithm increases the channel capacity,and the higher the number of users,the more evident the channel capacity improvement effect is.The results of this paper have an important reference value for enhancing the transmission performance of inductively coupled mooring chain underwater multinode data.

Coupling Relationship Among Technological Innovation,Industrial Transformation and Environmental Efficiency:A Case Study of the Huaihai Economic Zone,China

The 14th Five-Year Plan period is a critical period for China to achieve high-quality development. Based on super-efficiency slacks-based measure(SBM) model, grey-related analysis(GRA) and other models, this paper studies the heterogeneity of the coupling relationship among technological innovation, industrial transformation and environmental efficiency in the Huaihai Economic Zone during the period of 2005-2019. In addition, it analyzes the coupling mechanism of single and binary systems to the ternary system, which is of great significance for the collaborative symbiosis among systems. The findings are as follows. 1) The technological innovation, industrial transformation and environmental efficiency(TIE) systems of the Huaihai Economic Zone had significant spatial-temporal heterogeneity. Although their evaluation value fluctuated, the development trends are all positive. Ultimately, technological innovation is characterized by being high in the northeast and low in the southwest around Xuzhou, while other systems are relatively staggered in space. 2) The coupling of TIE systems is in transition, lack of orderly integration and benign interaction. However, the developing trend of interaction is also upward, and a spatial pattern driven by Xuzhou and Linyi as the dual cores has gradually formed. Moreover, the coupling is mostly manifested as outdated technological innovation and industrial transformation. Except for the final coordination of regenerative cities, the other resource types are all in transition. Cities in all traffic locations are still in transition. The overall system interaction of cities on Longhai Line(Lanzhou-Lianyungang Railway) is relatively optimal, and cities on Xinshi Line(Xinxiang-Rizhao Railway) are accelerating toward synergy. 3) The coupling status of TIE systems depends on the development of the single system and the interaction of the binary(2E) system. The coupling is closely related to technological innovation and Technology-Industry system,and is hindered by the inefficient interaction of Technology-Environment system. Specifically, the synergy of regenerative cities is attributed to the advantage of a single system and the effective integration of 2E systems. Beneficial from the advantages of environmental efficiency, the cities on Xinshi Line promote the synergy of the 2E and TIE systems. Therefore, while the Huaihai Economic Zone stimulates the development potential of the single and 2E systems, it is necessary to amplify the superimposition effect of systems in accordance on the basis of resource and location.

Live birth rates of assisted reproductive technology treatment and spontaneous conception among subfertile couples in Singapore: A follow-up study

Objective: To explore the potential predictors of a live birth (LB) outcome among subfertile couples of Asian ethnicity undergoing the first fertility treatment cycle;to assess the cumulative live birth rates after successive cycles;and to determine the incidence rate of spontaneous conception (SC).Methods:Subfertile couples were grouped according to treatment modalities at the first fertility treatment cycle: intrauterine insemination (IUI),in vitro fertilization (IVF), intracytoplasmic sperm injection (ICSI) and no treatment, and were followed-up for duration up to seven years. Multivariable logistic regression analysis was used for statistical analyses. Results: Age of female subjects [35-38 years, odds ratio (OR): 0.39;≥39 years, OR: 0.14], uterine factor subfertility (OR: 5.24), and treatment modalities (ORs: IUI 0.25, IVF 2.33 and ICSI 1.91) significantly predicted a LB outcome (P<0.05). The cumulative live birth rates were 11.7% IUI, 41.5% IVF, 27.5% ICSI and 22.6% from frozen embryo transfer cycles. The cumulative SC rate was 24.6% in the non-treated group and 10.7% in the treated group. All LBs from IVF cycles were delivered by the second cycle and within four years, compared to SC delivery of within five years in the non-treated group and six years in the treated group. Conclusions:Age of female subject, uterine factor and modalities of treatment are significant predictors for LB outcome at the first cycle. Higher delivery rates could be achieved following fewer successive IVF cycles and within a shorter duration compared to SC.

Research on the Coupling Mechanism of Creative Spirit Cultivation and Scientific and Technological Innovation Development

Migration and innovation is the driving force of scientific and technological development.By analyzing the coupling relationship between the two,this paper finds out the common elements shared by the two factors,and constructs the coupling guarantee mechanism between them,so as to provide suggestions for the coordination,win-win and synchronous benign development of the spirit of makers and the development of scientific and technological innovation,and promote the sustainable development of the national innovation system.

Research on the Low-carbon-high-value Agriculture Technology in the Comprehensive Improvement of Intra-county Environment Pollution——Taking the Development of Cultivation and Breeding Industry in the Ecological Cyclic Agricultural Garden in Shaoshan Irri

The comprehensive improvement strategy of intra-county environment pollution in the city and countryside was searched.By the research method which combined the microscopic view,the macroscopic view with the dynamic perspective,the seriousness of rural water quality,soil and atmospheric pollution in Xiangxiang,Xiangtan and the surrounding areas in Shaoshan irrigated area was revealed.The control measure which was 'four-dimensional pollution in the city and countryside'—— low-carbon-high-value agriculture and the technology innovation was proposed.The low-carbon-high-value technology innovation industrialization demonstration in three parts which included the pre-production,mid-production and post-production deep-processing of cultivation and breeding industry in the ecological cyclic agricultural garden in Shaoshan irrigated area was the driving force.We tried to propel the low-carbon ecological cultivation and breeding industry which included the paddy rice,grass,tree,medicinal herbs and pig,cow,chick,duck,fish.We wanted to relieve the structural unbalance of previous cultivation and breeding industry,'cheap grain hurting the farmers' and the short-leg problem of social-economic-ecological benefit.The results showed that the low-carbon-high-value agricultural system was a poly-generation technology system which promoted the multi-level and grading utilization,saved the energy,reduced the consumption and cleaned the production based on the ecology.

Tracking and Monitoring Leaf Development, Coupling Law and Regulation Techniques during Flowering Period of Hybrid Foxtail Millet (<i>Setaria italica</i>(L.) P. Beauv.) Parental Lines

The determining factor of Setaria italica (L.) P. Beauv. is the coupling of its flowering stage and outcrossing rate which leads to low and unstable seed yields in self-pollinated foxtail millet hybrids and thereby limits their large-scale application. In this study, Datong 27, Datong 29 and gu 83 were screened and identified through meticulous observations of their pollination habitats. High exposure rate, degree of exposure and plump of stigma are good factors to accept foreign pollen. Datong 27 and Datong 29 have some additional characteristics, such as long filaments and exposed and full anthers that contain a large amount of pollen. We transformed into a series of stigma-exposed and plump sterile lines that easily accepted exotic pollen. New restorer lines with anthers that were full of powder and exhibited quick recovery, which improved the parental lines’ heterosexual characteristics. By tracking and monitoring the leaf development of the new sterile and restorer lines, a coupling law of leaf development was determined and a series of flowering control measures were formulated. These factors ensured that the parental lines encounter one another during the flowering stage. By utilizing fertilizer and water, the vitality of the female stigma, amount of powder scattered and powder loosening time were prolonged, which increased hybrid seed yields from 1500 to 3000 kg/hm2. These findings were helpful in resolving the technical problems of seed production that restricted the propagation of foxtail millet hybrids and supporting future large-scale applications.

3-D Animation as Applied to the Solving of Coupling Relations in the 6-DOF Parallel Robot

How to solve the coupling relations in a 6 - DOF parallel robot quickly and accurately within the limits of realtime control is a critical problem. In traditional analytic method, the complicated mathemtical model must first be constructed and then solved by programming.Obviously, this method is not very practical. This paper,therefore, proposes a new way of approach with a new method using 3- D animation for the solving of coupling relations in the 6 - DOF parallel robot. This method is much simpler and its solving accuracy approaches that of the more complicated analytic method.

VOCs Destruction by Plasma Catalyst Coupling Using AL-KO PURE Air Purifier on Industrial Scale

We have investigated in this study the destruction of acetone and toluene with AL-KO PURE air purifier (AL-KO PURE) on industrial scale. In the case of acetone, 100% pollutant abatement is achieved with AL-KO PURE over more than 80 hours (the test duration time) at the high level concentration of 0.5 ppm (1187 μg/m3, about 7 times higher than the average living room level). This corresponds to 0.2 μmol/s with a flow rate of 38.42 m3/h. The regeneration of a saturated catalytic filter was also tested. When the catalytic filter of AL-KO PURE is fully saturated with acetone, a 100% acetone destruction efficiency can be achieved at 0.46 ppm concentration with 25% fan speed. Moreover the second pollutant, toluene, has been also studied. 100% toluene abatement also is achieved with AL-KO PURE over more than 80 hours (the test duration time) at the high level concentration of 0.2 ppm (811 μg/m3, 0.087 μmol/s with a flow rate of 38.42 m3/h). Finally, the availability for the simultaneous removal of both pollutants, acetone and toluene, has been also studied.

The Relationship between Water Resources Use Efficiency and Scientific and Technological Innovation Level: Case Study of Yangtze River Basin in China

The Yangtze River Basin’s water resource utilization efficiency(WUE)and scientific and technological innovation level(STI)are closely connected,and the comprehension of these relationships will help to improve WUE and promote local economic growth and conservation of water.This study uses 19 provinces and regions along the Yangtze River’s mainstream from 2009 to 2019 as its research objects and uses a Vector Auto Regression(VAR)model to quantitatively evaluate the spatiotemporal evolution of the coupling coordination degree(CCD)between the two subsystems of WUE and STI.The findings show that:(1)Both the WUE and STI in the Yangtze River Basin showed an upward trend during the study period,but the STI effectively lagged behind the WUE;(2)The CCD of the two subsystems generally showed an upward trend,and the CCD of each province was improved to varying degrees,but the majority of regions did not develop a high-quality coordination stage;(3)The CCD of the two systems displayed apparent positive spatial autocorrelation in the spatial correlation pattern,and there were only two types:high-high(H-H)urbanization areas and low-low(L-L)urbanization areas;(4)The STI showed no obvious response to the impact of the WUE,while the WUE responded greatly to the STI,and both of them were highly dependent on themselves.Optimizing their interaction mechanisms should be the primary focus of high-quality development in the basin of the Yangtze River in the future.These results give the government an empirical basis to enhance the WUE and promote regional sustainable development.

中国式现代化进程中教育、科技、人才“三位一体”耦合机制探赜

党的二十大报告提出“教育、科技、人才是全面建设社会主义现代化国家的基础性、战略性支撑”的新论断,将三者脱域于工作领域与学科范畴,呈现出相互作用、彼此影响以至协同发展的动态关系,即“三位一体”样态。经历分立到耦合演进过程,在中国式现代化的机遇挑战下,耦合机制应运而生。“三位一体”耦合机制体现了中国共产党积极调整对中国式现代化的科学认知,是开辟马克思主义中国化时代化新境界的理论成果。在理论原理层面,教育是前提与基础,奠定耦合坚固度;科技是支撑与动力,增加耦合协调度;人才是主体与目的,保持耦合持续度;创新是耦合点,确保耦合流畅度。面对实践推行的困境,以党的领导为节点进行“互嵌”,以人民满意为旨归“互通”,聚焦主体、主力、队伍保障“互促”,既抓“牛鼻子”基础研究又联动发展“互鉴”,以此推动建设教育强国、科技强国、人才强国。

石家庄市县域科技创新与经济发展耦合协调关系时空演变

选取石家庄市13个县域单元作为研究区域,构建科技创新能力和经济发展水平评价指标体系,计算评价指数,测算两者的耦合协调度,使用ArcGIS绘制空间分布图,深入剖析科技创新能力、经济发展水平以及两者耦合协调关系的时空演变特征。研究发现:全市县域科技创新能力和经济发展水平呈现较强的正相关性,且都在2010—2017年间提升速度较快,而在2019年之后提升速度呈减慢的趋势。2010—2021年经济发展水平指数均高于科技创新能力指数,但后者提升速度高于前者,表明石家庄市各县域科技创新能力滞后于经济发展水平,但科技创新能力的发展势头较好。2010年以来,全市县域耦合协调度呈现上升趋势,但耦合协调度与科技创新能力和经济发展水平的变化趋势相似,即2018年之前的提升速度要快于2018年之后。2021年,全市县域耦合协调度等级为“勉强协调发展”,协调发展水平较低,有待进一步提升。

中国省域环境规制与科技创新耦合协调发展研究

环境规制与科技创新耦合协调发展能为实现经济增长与生态文明提供强有力的支撑。该文构建环境规制与科技创新水平评价指标体系,利用耦合协调度模型测算2009—2020年中国30个省域环境规制与科技创新的耦合协调度,并对耦合协调度的时空分布格局进行分析。结果表明:研究期内中国30个省域环境规制与科技创新的耦合协调度整体偏低,尚未达到良性耦合协调发展状态,但呈现上升趋势,增幅呈现“西高东低”特征;各地区耦合协调度发展不均衡,整体呈现“东高西低、南高北低”的空间分布格局,高水平耦合协调区域逐渐从东部沿海向内陆扩张;依据协调等级和特征将各省域划分为创新主动型、技术进步型、环境约束型、传统被动型和创新滞后型,并提出环境规制应结合地区创新能力实施差异化的区域政策等建议。

绿色金融与技术创新耦合协调对低碳经济发展的影响

绿色金融与技术创新耦合协调是发展新质生产力的重要着力点,是实现低碳经济发展的必由之路。本文选取2000—2021年中国省级面板数据,利用熵值法测算低碳经济发展综合指数,在此基础上使用双向固定效应模型检验绿色金融与技术创新耦合协调对低碳经济发展的影响。研究结果表明,低碳经济发展整体表现为稳定上升的趋势,且呈现“东高、中平、西低”的分布格局;省域绿色金融与技术创新耦合协调主要呈现高耦合协调度,且由沿海地区向内陆地区递减;绿色金融与技术创新耦合协调对低碳经济发展具有正向影响,同时绿色金融与技术创新耦合协调对低碳经济发展产生空间溢出效应。基于上述结果,为进一步优化绿色金融与技术创新协调发展和助力低碳经济发展,应注重“绿色”和“蓝色”资源优势,实施差异化低碳经济发展战略;以“空间治理”为抓手,促进区域绿色金融和技术创新协调发展;完善协同政策,有效提升新质生产力;加强区域空间重塑,充分发挥耦合协调的空间溢出效应。

教育-科技-人才耦合协调度研究———基于30个省级区域的实证分析

本文运用耦合协调度模型、空间自相关分析和灰色关联度模型,探讨2010—2020年30个省区市(港澳台和西藏除外)教育、科技、人才的综合发展水平,以及三者的耦合协调度。研究发现:①教育、科技、人才各子系统的综合水平呈平稳增长态势,其中人才增长态势最好,教育增长态势次之,且各子系统间的发展差距逐渐减小;②三者的耦合协调度值逐年上升,从轻度失调转变为濒临失调,但区域发展不均衡,整体尚未达到融合发展的较优状态;③耦合协调度在省际层面呈显著的全局和局部自相关,空间俱乐部趋同特征明显;④根据重要性程度,驱动教育、科技、人才耦合协调的因素依次包括经济条件、产业发展、市场化程度、政府调控水平、人口规模等,但存在区域异质性。

基于灰色关联度农村旅游经济与生态环境的耦合协调关系研究

随着农村旅游业的发展,旅游经济与生态环境的耦合协调关系至关重要.采用灰色关联度分析法,旨在深入分析两者相互作用及耦合协调机制,以期科学管理农村经济发展与生态环境保护.分析农村旅游经济与生态环境互动及其耦合机制,并通过灰色关联度法评估二者的协调度.结果表明:初期各指标间关联度介于0.643~0.868范围内,后期关联度介于0.635~0.906范围内,显示系统间耦合协调性逐渐增强,揭示了各种因素随时间改变对耦合协调关系的作用,为促进农村旅游业可持续发展和生态环境有效保护提供了科学依据.

我国高等教育、人力资本、科技创新与区域经济耦合协调的时序演变及空间集聚性分析

高等教育、人力资本、科技创新与区域经济耦合协调既是实现中国式现代化的战略支撑,也是加快释放人才质量红利、推动我国经济转向人才创新驱动的动力保障。通过实证分析对2010—2020年31个省份四系统发展水平及耦合协调度进行评价。研究发现:全国与各省份高等教育、科技、人力与经济等四系统发展水平整体上升,其中,经济增幅最大,人力资本增幅最小,高等教育受扩招影响提升缓慢,科技创新整体上涨但波动剧烈。在观测期内,全国四系统耦合呈东部最高、中部次之、西部最低的发展态势,并呈东部高-高集聚与西部低-低集聚的空间分异特征。北京、上海、广东、江苏与浙江耦合等级和等级提升均高居全国前列,马太效应突出。截至2020年,中西部各省份均处于“勉强协调及以下”水平,其中,17个省份四系统耦合濒临失调或轻度失调。应坚持系统观念,创新协同发展机制;加快高等教育结构优化调整,推进区域高等教育差异化发展;加大人力资本投入,激活中西部人口质量红利。

中国航天企业技术创新与商业模式创新耦合协调能力及其时空演化特征

中国的航天强国战略对国内航天企业技术与商业模式创新耦合协调能力建设提出了新要求,但至今仍缺少对航天企业从定量角度评价分析二者耦合协调能力的研究。因此,采用社会网络分析法与价值网络理论构建由技术创新能力评价体系与商业模式创新能力评价体系构成的航天企业技术创新与商业模式创新耦合水平评价指标体系,以中国26家A股上市航天企业为研究对象,利用其2012—2021年的面板数据,分别从时间和空间维度测算其两类创新能力大小以及二者的耦合协调水平。结果显示:中国航天企业技术创新能力与商业模式创新能力整体不强,其中技术创新能力在整体和区域层面都保持稳定增长趋势,但商业模式创新能力在中部和东北地区呈“先升后降”趋势、在东部和西部呈持续下降趋势,东部和东北地区的商业模式创新能力强于其技术创新能力,而中部和西部地区则相反,且西部的两种创新能力均为最低;两种创新的耦合度呈“中部>西部>东北>东部”的空间发展格局,其中东部和东北地区呈现上升趋势,但中部和西部呈下降趋势;两种创新的耦合协调水平整体偏低,表现出空间性和滞后性特征,并呈现“东高西低”的空间发展格局。最后根据研究发现,提出通过政府与企业的双向驱动加速提升中国航天企业技术创新和商业模式创新能力及其耦合协调水平的相关对策建议。

我国高等教育、人力资本与科技创新的耦合协调研究

在教育、科技、人才“三位一体”发展视域下,高等教育、人力资本与科技创新的耦合协调发展是实现中国式现代化的必由之路。在对三系统耦合机理进行探讨的基础上,本研究基于2010—2021年省级面板数据,利用熵权法和耦合协调度模型对三系统综合发展水平和耦合协调发展水平进行分析,并采用GM(1,1)预测模型对2022—2026年的耦合协调度进行了预测。研究发现,我国高等教育、人力资本与科技创新发展水平呈现增长趋势,整体水平较低,高等教育发展最快,但在三系统中处于较为落后的状态;全国三系统耦合协调度有所提升,截至2021年达到勉强协调状态,整体水平依旧偏低;各省份耦合协调度差异较大且持续存在,整体上呈现“东部>中部>东北>西部”的空间特征与梯度格局;2022—2026年耦合协调度有所增长,大致延续了2010—2021年的变化趋势,短期内难以实现跨越式发展,且地区差异依然存在。为此,我国需要发挥高等教育核心枢纽的支撑作用,依托新质人才培养促进“三位一体”融合发展;政府要在宏观战略上统筹“三大战略”,形成“三位一体”螺旋发展合力;各地区要明确内外差异与发展重点,因地制宜促进区域协调发展。