Abstract:Taking Anyang City,Henan Province as an example,this study focuses on the livelihood project of elevator retrofitting in old residential districts of third-and fourth-tier cities in the urban stock renewal era.The paper systematically combs through the stock scale of non-elevator housing in old residential districts of Anyang City,analyzes case experiences of completed projects and the current policy system,and draws on successful practices of similar domestic cities to deeply explore the core contradictions faced in the current elevator retrofitting work,including cost sharing,interest coordination,technical approval,and long-term operation and maintenance.Based on the multi-stakeholder collaborative governance theory,the study proposes a four-in-one solution framework of"government guidance,market operation,community coordination,and resident co-governance",and designs differentiated technical paths and implementation strategies for different types of residential districts.Ultimately,it aims to construct a practical,sustainable and promotable governance model for elevator retrofitting in Anyang City,alleviate the"difficulty in going up and down stairs"in an aging society,and provide referable policy references and practical experiences for similar cities across the country.

Abstract:The impermeability of concrete is one of the important factors determining its durability.Through indoor experiments,using factor experiment methods combined with analysis of variance(ANOVA),the influence degree and variation law of fly ash dosage,steel fiber volume ratio,and recycled fine aggregate replacement rate on the impermeability of concrete were studied in detail.The research results show that when the fly ash dosage is 30%,the steel fiber volume ratio is 0.5%～1%,and the recycled fine aggregate replacement rate is 50%,the steel fiber reinforced recycled fine aggregate concrete exhibits the best impermeability.Further analysis reveals that the most critical factor affecting the impermeability of this type of concrete is the recycled fine aggregate replacement rate,whose influence is very significant;followed by the steel fiber volume ratio,whose influence is also significant;in contrast,the influence of fly ash dosage on the impermeability of concrete is not significant.

Abstract:Against the background of deepening sports reform in the new era,re-interpreting Mao Zedong's sports thought in On Physical Education has important theoretical value for grasping the laws of sports development and enlightening contemporary practice.First of all,using research methods such as literature review and textual analysis,this paper reveals the true essence of Mao Zedong's sports thought in On Physical Education through three fundamental inquiries:"What is sports?What efficacy does sports have?What is the ultimate purpose of sports?"Secondly,focusing on three dimensions—"logical starting point,fundamental guideline,and practical transcendence"—it discusses the orientation of Mao Zedong's sports thought in this work.Finally,focusing on four types of thoughts,namely mass sports,lifelong sports,sports first,and happy sports,this paper explores the value of Mao Zedong's sports thought in On Physical Education.

Abstract:To address the challenges in regulating the particle size and optical properties of indirect bandgap semiconductor quantum dots,this study develops an efficient preparation process for silicon carbide(SiC)quantum dots(QDs)so as to realize their precise size control and monodispersity optimization.β-SiC powder synthesized via self-propagating high-temperature synthesis(SHS)was used as the raw material,and an efficient etching was conducted with a HF-HNO₃ binary mixed acid etching system.Based on the density gradient centrifugation theory,the monodispersity of QDs was regulated through a high-gravity chromatography trimming process.Electron microscopy and fluorescence spectrophotometry were employed to systematically characterize the micromorphology and optical properties of the products,and the etching reaction mechanism and the laws of the trimming process were further investigated.The synergistic effect of HNO₃ oxidizing the raw SiC powder to form SiO₂ and HF cleaving the Si-O bonds enabled the rapid preparation of SiC QDs with an average diameter of 4.9 nm.The uneven particle size distribution after ultrasonication resulted in a slight red shift of the emission peak with the increase of excitation wavelength.By adjusting the high-gravity coefficient(μ=3000,4000,5000),the precise regulation of SiC QD sizes in the range of 4.6～7.1 nm was achieved,and a correlation mechanism among"high-gravity coefficient–particle size–spectral properties"was preliminarily established.The novel preparation and regulation process for SiC QDs proposed in this study provides a new technical pathway for the regulation of particle size and optical properties of indirect bandgap semiconductor quantum dots,and exhibits significant theoretical and application value.

Abstract:To improve the tensile properties,hardness,and low-temperature impact toughness of prefabricated building steel structures,the effects of austenitizing temperature and quenching cooling medium on the microstructure,hardness,tensile properties,and low-temperature impact properties of prefabricated building steel were investigated.The results show that at different quenching temperatures,the metallographic structure of the test steel consists of martensite and residual austenite;increasing the quenching temperature increases the austenite grain size and lath martensite width of the test steel.As the austenitizing temperature rises from 850～940℃,the strength and microhardness of the test steel increase,while its toughness and plasticity(elongation after fracture,reduction of area,and-20℃impact energy)gradually decrease.When the austenitizing temperature is 910℃,the test steel exhibits high strength and plasticity as well as high-20℃impact energy,making it the optimal austenitizing temperature.Under the three cooling rates,the metallographic structure of the test steel is lath martensite and residual austenite;the faster the cooling rate,the finer the grains and lath martensite structure of the test steel,and the higher its strength and hardness.When the cooling medium is 8 wt.%NaCl solution,the grain size and lath martensite bundle size of the test steel are the finest.

Abstract:The formation of the Communist Party of China(CPC)'s political leadership is a systematic process in which the six dynamic elements of"theory,value,organization,practice,system,subject"work together,and its operation follows the progressive logic of"motivation origin,power linkage,power aggregation".To continuously advance Chinese-style modernization and realize the Chinese Dream of the great rejuvenation of the Chinese nation,the CPC's political leadership should consolidate the foundation support through ideological guidance and value cohesion,strengthen the efficiency support by virtue of organizational practice and institutional guarantee,and consolidate the vitality support by activating the party subject.Through coordinated efforts and mutual interaction,all elements jointly provide dynamic support for the generation and continuous deepening of the CPC's political leadership.

Abstract:Xi Jinping's important expositions on the ecological protection and high-quality development of the Yellow River Basin adhere to and develop the Marxist view of ecological civilization,summarize and reflect on the experience of the Party leading the people in harnessing the Yellow River,respond to and address the challenges to ecological security in the Yellow River Basin,and inherit and carry forward the fine traditional culture of the Yellow River Basin.They provide fundamental guidelines for effectively preventing and defusing ecological security risks in the Yellow River Basin and improving the overall pattern of comprehensive and coordinated ecological protection of the Yellow River.The essential requirement of these important expositions is to uphold the unity of the Party's leadership and putting the people first;the key approach is to integrate overall planning with adaptation to local conditions;the fundamental driving force is to promote the mutual reinforcement of deepening reform and opening up;and the core goal is to pursue the coordination of ecological protection and economic development.In the new era and on the new journey,we should strengthen the protection and restoration of the ecological environment in the Yellow River Basin,promote the transformation and utilization of resources and energy in the Yellow River Basin,uphold the inheritance and innovation of ecological culture in the Yellow River Basin,consolidate the foundation and advantages of ecological prosperity for the people in the Yellow River Basin,and strive to write a brilliant chapter of the Yellow River in advancing Chinese-style modernization.

Abstract:To improve the photoelectric conversion efficiency of perovskite solar cells(PSCs)by introducing organic small-molecule dopants for the photosensitive layer,this study focuses on inverted-structured PSCs.A new organic small-molecule dopant,5-bromopyridine-2,3-dicarboxylic acid(BDA),was introduced into the photosensitive layer of PSCs,and planar PSCs were assembled accordingly.The prepared PSCs devices were characterized using scanning electron microscopy(SEM),X-ray diffraction(XRD),current-voltage(J-V)characteristics,and other techniques to analyze the influence law of BDA on perovskite film quality and carrier transport capacity,and further explore the mechanism by which BDA improves the photoelectric conversion efficiency of PSCs devices.Research results show that multiple functional groups in BDA have a passivation effect on internal defects of perovskite crystals,inhibiting the formation of defects such as MA⁺,I⁻,and metallic Pb⁰ in perovskite films,and reducing photoelectron energy loss caused by nonradiative recombination of electrons and holes.This is conducive to the formation of high-quality perovskite films,thereby improving the photoelectric conversion efficiency of the devices.In addition,the regulation of BDA on the energy level of perovskite films also enhances the carrier extraction and transport capabilities of the devices.PSCs based on BDA doping achieved a photoelectric conversion efficiency of 13.42%,outperforming undoped PSCs in overall performance.As a low-cost photosensitive layer dopant,the successful introduction of BDA provides a new research strategy for preparing high-efficiency planar perovskite solar cells.

Abstract:To scientifically evaluate the maintenance quality of national and provincial roads and identify key risk factors,this study constructs a multi-dimensional evaluation index system based on the 5M1E theory(Man-Machine-Material-Method-Measurement-Environment).Innovatively combining the Analytic Hierarchy Process(AHP)with the Cloud Model,an AHP-Cloud Model comprehensive evaluation model is established.In this model,AHP is used to determine the weights of indicators,while the Cloud Model is employed to handle the fuzziness and randomness of expert judgments,realizing the effective conversion between qualitative concepts and quantitative evaluation.Through empirical analysis of a national and provincial road in Luoyang City,the feasibility and effectiveness of the model in the comprehensive evaluation of maintenance quality are verified,which can accurately identify key risk factors and quantify evaluation levels.The research findings provide theoretical support and practical guidance for the scientific evaluation and precise control of maintenance quality of national and provincial roads.

Abstract:To address the problem of slow equalization speed of lithium battery packs caused by the increased differences in capacity,voltage,and impedance among individual cells after long-term use,a corresponding solution is proposed.A hierarchical equalization topology based on the Buck-Boost circuit is designed,with the battery state of charge(SOC)selected as the equalization variable.An equalization control strategy combining the average value difference comparison method and the relative range method is adopted to realize step-by-step equalization of lithium battery packs.Firstly,the overall structure,grouping method,working principle of the minimum equalization unit,and calculation process of equalization parameters of the improved equalization topology are clarified.Secondly,the reasons for selecting SOC as the equalization variable and the specific content of the equalization control strategy are explained.Finally,a simulation model of the hierarchical equalization structure is built in the Matlab/Simulink environment to carry out equalization simulation verification,and comparative simulations are conducted with the traditional single-layer equalization topology at the same time.Simulation results show that under the two working conditions of 6-cell and 7-cell battery packs,the equalization speed of the designed hierarchical equalization topology is increased by 78.6%and 79.8%respectively compared with the traditional single-layer equalization topology.The results indicate that the designed hierarchical equalization topology and equalization control strategy are effective and can significantly improve the equalization speed of lithium battery packs.

Abstract:To address the demand for high-precision omnidirectional movement of aircraft engine disassembly and assembly vehicles in confined spaces for aviation maintenance,this study investigates the motion stability of the Mecanum wheel omnidirectional moving mechanism under non-ideal operating conditions.A multi-error coupling dynamic model was established,and combined with the multi-physics simulation of ADAMS and MSC.Dytran,the effects of wheel misalignment(0～40 mm offset)and road surface slippage on the motion performance of the mechanism were systematically analyzed.The results show that wheel misalignment has a slight impact on the forward and backward movement,but significantly degrades the lateral movement and causes velocity fluctuation and longitudinal creep.Under the slippage condition,the mechanism exhibits obvious radial and lateral coupled motion,leading to the decline of trajectory control accuracy.Furthermore,based on the simulation data,an analysis model integrating tolerance design and cost trade-off was constructed.This study provides a theoretical basis and technical support for the reliability design of heavy-duty omnidirectional mobile equipment.

Abstract:To develop a type of noodles with both nutritional value and excellent sensory characteristics,this study takes wheat flour as the basic raw material,supplemented with chestnut flour and highland barley flour to prepare chestnut and highland barley noodles.With the sensory evaluation score as the experimental index,the formulation was optimized through single-factor tests and response surface methodology.The results show that with wheat flour addition set as 100%(baseline),the prepared noodles achieve a sensory score of 94.7 points(predicted sensory score:94.18 points)when the addition levels of chestnut flour,highland barley flour,table salt and vital wheat gluten are 10.51%,15.19%,1.17%and 2.94%respectively.Under this condition,the cooking breakage rate of the noodles is 3.5%,water absorption rate is 157.4%,and cooking loss rate is 5.6%.The noodles prepared with the optimal formulation are yellowish-brown in color,with pure flavor and a fine and smooth taste.

Abstract:Wang Xuezhong's poetry is rooted in reality and the authentic texture of grassroots life,while questioning social ideals and demonstrating the poet's lofty artistic pursuit and conscious sense of historical responsibility.His poetry includes the vital"cries"of individual life experiences,the persistent shouts of concern for external reality,and the idealistic appeals in the face of era changes.As an important realistic poet in contemporary Chinese poetry,Wang Xuezhong's poetry directly faces the essence of life and the complexity of human nature,both eulogizing the perseverance and optimism of the working people and criticizing various injustices in society.

Abstract:As an important component of the data field,public data elements are a key link in promoting social and economic development and enhancing the modernization of government governance capabilities.Authorized operation of public data provides a beneficial path for releasing the value of public data elements and driving the development of the digital economy.In the process of market-oriented allocation of public data elements,there are still prominent problems such as unclear ownership of public data,disputes over the definition of transaction objects,incomplete rights protection mechanisms,and potential risks in authorized operation.To address these issues,optimization measures should be implemented,including clarifying the state ownership of public data,constructing a balanced interest mechanism for relevant subjects,establishing a unified and multi-level rights protection system,and improving the public data opening and authorization mechanism in multiple aspects,so as to establish a healthy,adequate and sustainable market-oriented allocation system of public data elements.

Abstract:Focusing on Henan Satellite TV's"Chinese Festivals"series programs,this paper explores its regional cultural communication strategies.By analyzing the program's in-depth excavation of Henan's regional cultural elements,innovation in content and form,integrated application of new technologies,and brand marketing and promotion,it reveals the important role of the series in inheriting and promoting regional culture and driving the development of local cultural tourism.Local media can learn from its experience,tap into local cultural resources,and play the strongest voice of regional cultural communication in the new media era.

Abstract:Promoting the popularization of Marxism is an eternal task and a major strategic mission for Chinese Communists.However,with the changes of the times,the development of practice,and the enrichment of theory,efforts to promote the popularization of Marxism in different historical periods should be adjusted accordingly in terms of main content,basic approaches,and important supports.To advance the popularization of Marxism in the New Era,we must take Xi Jinping Thought on Socialism with Chinese Characteristics for a New Era as the main content,adopt differentiated communication as the basic approach,and rely on various media as important supports.Only in this way can the broad masses of people truly understand,fully grasp,and highly recognize Marxism;only then can Marxism be genuinely transformed into a powerful material force,continuously opening up new chapters in the cause of socialism with Chinese characteristics.

Abstract:This paper explores the"Tibetan New Wave"cinema in the 21st century.Firstly,from the perspective of narrative aesthetics,it analyzes the innovation of its creative mode and the localized presentation of ethnic images.Secondly,from the perspective of spatial aesthetics,it sorts out the unique regional writing of Tibetan cinema in three aspects:geographical space,family space and spiritual space.Finally,it analyzes the ingenuity of the creators from the thematic conception.Faced with the impact of modern civilization and cultural anxiety,directors of the"Tibetan New Wave"strive to achieve an aesthetic breakthrough in their creations,which is not only a reflection on the inheritance of their own national culture but also a confident adherence to national culture in the context of globalization.

Abstract:The key to the high-quality development of higher education lies in enhancing the core literacy of university teachers.This study holds that the core literacy of university teachers mainly consists of six aspects:moral literacy,humanistic literacy,information literacy,educational and teaching literacy,professional practice literacy,and scientific research and innovation literacy.Among them,professional ethics literacy is the foundation,humanistic literacy is the prerequisite,information literacy is the guarantee,educational and teaching literacy is the core,professional practice literacy is the key,and scientific research and innovation literacy is the sublimation.We should comprehensively enhance the core literacy of university teachers by strengthening the construction of professional ethics,establishing a humanistic learning concept,promoting the application of information technology,improving educational and teaching standards,enhancing professional practical skills,and fostering scientific research and innovation capabilities.

Abstract:With the deepening of economic structural reforms and the increase in the number of university graduates,the employment difficulty of female college students has become a social problem.To effectively assist female college students in securing employment,there is an urgent need for the three major support subjects—government,universities and enterprises—to integrate resources and forces,give play to the joint force of full-staff support,construct a precision employment support system for female college students,and form a universal framework.Based on multi-subject collaboration,the system realizes the linkage of various subjects through building a closed-loop support mechanism of"precision identification—dynamic adaptation—long-term tracking",promotes the career development of female college students,extends the achievements to all college students,and ultimately promotes the high-quality employment of university graduates.

Abstract:As a"living fossil"of Chinese civilization,the Yinxu Oracle Bone Scripts have value far beyond their function as a writing system.They provide tangible evidence for the existence of the Shang Dynasty,establishing the starting point of the verifiable history of Chinese civilization.With its mature writing system,it lays the foundation for the inheritance of Chinese characters and contains the genetic code of Chinese civilization.Its rich inscriptions reconstruct a comprehensive panorama of Shang society,showing the primitive embryonic form of Chinese ideological and cultural traditions.In the new era,through being inscribed on the"Memory of the World Register",digital empowerment and IP innovation,the Yinxu Oracle Bone Scripts have become an important carrier for strengthening cultural confidence and promoting cultural inheritance and innovation.