PFI磨预处理提高桉木浆纤维反应活性的研究

采用PFI磨对桉木漂白化学浆进行预处理后,以丙烯酰氯为酯化试剂,在球磨机中进行酯化反应,通过纤维质量分析仪、光学显微镜、X射线衍射(XRD)和傅里叶红外光谱(FT-IR)对纤维的形貌和结构进行了分析,并进一步考察了酯化条件对纤维素反应活性的影响。研究结果表明:随着PFI磨转数的增加,纤维长度、纤维宽度减小,细小纤维比例显著提高,由19.86%增大至38.47%。经PFI磨打浆后,纸浆纤维表面纤丝化明显,其结晶区域部分遭破坏,结晶度由72.7%降低至66.9%;XRD结果表明:反应过程中酯化产物的结晶结构发生了改变。FT-IR结果表明:PFI磨解纤维与丙烯酰氯经球磨发生酯化反应得到丙烯酰基纤维素。酯化产物的取代度(D_(S))随着PFI磨转数的增加而增大;与未经预处理纤维相比,反应产物的D_(S)明显增加,最高可达2.38,此时的反应条件为PFI磨预处理24000 r,纤维素与丙烯酰氯的物质的量比1∶6,球磨反应时间48 h。

UNEP welcomes China to international decarbonization initiative

An official with the United Nations Environment Programme has welcomed China’s participation in an international initiative that aims to decarbonize the building sector,saying it offers the opportunity for China to share its valuable experiences and insight on promoting green buildings.Jonathan Duwyn,program officer of UNEP’s buildings and construction cities unit,made the remarks in a recent interview with China Daily,following the launch of the Buildings Breakthrough on Dec.6at COP28United Nations climate change conference in Dubai,the United Arab Emirates.

Enhancing Private Healthcare Effectiveness in Lagos State, Nigeria: An Overview of the Effect of Quality Improvement Initiatives and Implications for Sustainable Healthcare Delivery

Background: Nigeria, a nation grappling with rapid population growth, economic intricacies, and complex healthcare challenges, particularly in Lagos State, the economic hub and most populous state, faces the challenge of ensuring quality healthcare access. The overview of the effect of quality improvement initiatives in this paper focuses on private healthcare providers in Lagos State, Nigeria. The study assesses the impact of donor-funded quality improvement projects on these private healthcare facilities. It explores the level of participation, perceived support, and tangible effects of the initiatives on healthcare delivery within private healthcare facilities. It also examines how these initiatives influence patient inflow and facility ratings, and bring about additional benefits and improvements, provides insights into the challenges faced by private healthcare providers in implementing quality improvement projects and elicits recommendations for improving the effectiveness of such initiatives. Methods: Qualitative research design was employed for in-depth exploration, utilizing semi-structured interviews. Private healthcare providers in Lagos involved in the SP4FP Quality Improvement Project were purposively sampled for diversity. Face-to-face interviews elicited insights into participation, perceived support, and project effects. Questions covered participation levels, support perception, changes observed, challenges faced, and recommendations. Thematic analysis identified recurring themes from interview transcripts. Adherence to ethical guidelines ensured participant confidentiality and informed consent. Results: Respondents affirmed active involvement in the SP4FP Quality Improvement Project, echoing literature emphasizing private-sector collaboration with the public sector. While acknowledging positive influences on facility ratings, respondents highlighted challenges within the broader Nigerian healthcare landscape affecting patient numbers. Respondents cited tangible improvements, particularly in staff management and patient care processes, validating the positive influence of quality improvement projects. Financial constraints emerged as a significant challenge, aligning with existing literature emphasizing the pragmatic difficulties faced by private healthcare providers. Conclusions: This study illuminates the complex landscape of private healthcare provision in Lagos State, emphasizing the positive impact of donor-funded quality improvement projects. The findings provide nuanced insights, guiding policymakers, healthcare managers, and practitioners toward collaborative, sustainable improvements. As Nigeria progresses, these lessons will be crucial in shaping healthcare policies prioritizing population well-being.

Colorectal cancer’s burden attributable to a diet high in processed meat in the Belt and Road Initiative countries

BACKGROUND Colorectal cancer(CRC)plays a significant role in morbidity,mortality,and economic cost in the Belt and Road Initiative(“B and R”)countries.In addition,these countries have a substantial consumption of processed meat.However,the burden and trend of CRC in relation to the consumption of a diet high in processed meat(DHPM-CRC)in these“B and R”countries remain unknown.AIM To analyze the burden and trend of DHPM-CRC in the“B and R”countries from 1990 to 2019.METHODS We used the 2019 Global Burden of Disease Study to collate information regarding the burden of DHPM-CRC.Numbers and age-standardized rates(ASRs)of deaths along with the disability-adjusted life years(DALYs)were determined among the“B and R”countries in 1990 and 2019.Using joinpoint regression analysis,the average annual percent change(AAPC)was used to analyze the temporal trends of age-standardized DALYs rate(ASDALR)from 1990 to 2019 and in the final decade(2010–2019).RESULTS We found geographical differences in the burden of DHPM-CRC among“B and R”countries,with the three highest-ranking countries being the Russian Federation,China,and Ukraine in 1990,and China,the Russian Federation,and Poland in 2019.The burden of DHPM-CRC generally increased in most member countries from 1990 to 2019(all P<0.05).The absolute number of deaths and DALYs in DHPM-CRC were 3151.15[95%uncertainty interval(UI)665.74-5696.64]and 83249.31(95%UI 15628.64-151956.31)in China in 2019.However,the number of deaths(2627.57-2528.51)and DALYs(65867.39-55378.65)for DHPM-CRC in the Russian Federation has declined.The fastest increase in ASDALR for DHPM-CRC was observed in Vietnam,Southeast Asia,with an AAPC value of 3.90%[95%confidence interval(CI):3.63%-4.16%],whereas the fastest decline was observed in Kyrgyzstan,Central Asia,with an AAPC value of-2.05%(95%CI:-2.37%to-1.73%).A substantial upward trend in ASR of mortality,years lived with disability,years of life lost,and DALYs from DHPM-CRC changes in 1990-2019 and the final decade(2010-2019)for most Maritime Silk Route members in East Asia,South Asia,Southeast Asia,North Africa,and the Middle East,as well as Central Europe,while those of the most Land Silk Route members in Central Asia and Eastern Europe have decreased markedly(all P<0.05).The ASDALR for DHPM-CRC increased more in males than in females(all P<0.05).For those aged 50-74 years,the ASDALR for DHPM-CRC in 40 members exhibited an increasing trend,except for 20 members,including 7 members in Central Asia,Maldives,and 12 high or high-middle social development index(SDI)members in other regions(all P<0.05).CONCLUSION The burden of DHPM-CRC varies substantially across“B and R”countries and threatens public health.Relevant evidence-based policies and interventions tailored to the different trends of countries in SDIs or Silk Routes should be adopted to reduce the future burden of CRC in“B and R”countries via extensive collaboration.

Preliminary Study on Overseas Applicability of Chinese Architectural Design Standards:Taking China-Aided Construction Projects in Asia Since the Belt and Road Initiative as Examples

This research takes China-aided construction projects in Asia since the Belt and Road Initiative as examples to explore the applicability of Chinese architectural design standards in other Asian countries.So far,the standards demonstrated the highest applicability in South Asia is the best followed by Southeast Asia.Chinese architectural design standards for educational buildings showed the highest applicability,followed by office,medical,and sports buildings.This study puts forward some strategies to improve the applicability of Chinese architectural design standards.These strategies include integrating regionalism and local cultural traditions,optimizing energy efficiency,and aligning designs with local usage habits.This study serves as a reference for similar projects in the future.

Discourse Analysis of the Belt and Road Initiative From the Perspective of Central Asian Countries: A Case Study of the Republic of Kazakhstan

This study employs Norman Fairclough’s Critical Discourse Analysis(CDA)three-dimensional model,using the Republic of Kazakhstan as a case study,to delve into the discourse construction of China’s Belt and Road Initiative(BRI)in Central Asian countries.Through detailed analysis of policy documents,media reports,and public discussions in Central Asian countries,this paper reveals how the BRI constructs specific social practices,discourse events,and textual meanings within these nations.The findings indicate that through this global development strategy,China has not only strengthened its economic ties with Central Asian countries but has also exerted profound influences on political,cultural,and social levels.

漂白硫酸盐针叶木浆板PFI磨法影响因素分析

本研究主要是以PFI磨浆机对漂白硫酸盐针叶木浆板进行打浆,以打浆度(肖伯尔—瑞格勒法)判断打浆效果,进而分析实验室打浆过程中各个因素的影响程度,从而更好地帮助实验室进行制浆。研究发现,磨浆比压、磨浆转数(磨浆时间)、磨浆浓度是实验室PFI磨法打浆的主要影响因素。

Indian Solar Panel Initiatives in Reducing Carbon Dioxide Emissions

Environmental degradation and the emission of greenhouse gases particularly carbon dioxide have expanded problems to human wellness and to the atmosphere. The second-most populated country in the globe, India, is among the primary users of conventional resources, which leads to global warming. The growth rate is anticipated to raise more before 2050, which will cause the brisk industrial expansion and rising energy demand to both increases. In order to reduce carbon emissions and meet energy requirements, many countries use alternate usage of renewable energy particularly solar energy. In this review we aim to study solar panel schemes initiated by India, mainly focusing on National Solar Mission. This study also reviews the present solar installed capacity, solar panel scheme 2022, and initiatives and outcomes of solar panels in residences and offices. This study reviewed that by using solar panel resources, the (MNRE) Ministry of New and Renewable Energy hopes to help the Indian Government reach its purpose of 100 GW solar installed capacity by end of 2022. Despite having an amazing 40 GW of solar power installed capacity till December 2021, India is still far from reaching its own goal of 100 GW by March 2023 as per NSM. In essence, this means that India will need to change a few of its ongoing plans further.

Construction of University Librarian Team in the Context of Double First-Class Initiative

Data services,knowledge services,and information services are the core service elements of university libraries in the context of the Double First-Class Initiative.Combined with the current situation of insufficient overall service capacity of libraries,this paper proposed strategies and implementation paths for optimizing the service system from three aspects:the construction of the professional qualification system for librarians,the establishment of post institutions,and the construction of library culture.Long-term path:putting library human resource management into the legal track,taking the lead in local legislation,and promoting the construction of library legislation and professional qualification certification system;optimizing the personnel system,implementing hierarchical management and classified assessment for professional librarians and auxiliary librarians.Short-term path:intensive post allocation,namely,assigning the core strength in the core post,and tackling the temporary major work combining multiple forces in the form of a"working group";building an open knowledge service ecosystem,accelerate the cross-border integration of libraries and other organizations,and striving to build the core competitiveness of libraries.

Integration of the Historical Initiative Spirit into the Ideological and Political Course of Colleges and Universities : Value Implication, Main Contents and Practical Dimension

The value implication,main contents and practical dimension of integrating the historical initiative spirit into the ideological and political course of colleges and universities were studied.From the perspective of value implication,integrating the historical initiative spirit into the ideological and political course of colleges and universities is helpful to promoting the integrity and innovation of the ideological and political course in colleges and universities,deepening the historical cognition of students and building the cornerstone of students belief.From the perspective of main contents,teachers of ideological and political course should clarify the theoretical connotation of the historical initiative spirit,give a thorough exposition of the generation logic of the historical initiative spirit,and explain The Times value of the historical initiative spirit lively.From the perspective of practical dimension,it is necessary to give full play to the educational function of the historical initiative spirit by enriching the content of curriculum teaching,innovating the ways and methods of education and teaching,integrating theory and practice,and online and offline interaction.

Preliminary validation of Global Leadership Initiative on Malnutrition criteria in cancer patients:A cross-sectional study

Background:The Global Leadership Initiative on Malnutrition(GLIM)has been used in China since 2019.This study aimed to test the use of the GLIM criteria in Chinese cancer patients and to compare the diagnostic performance of the GLIM criteria with the Patient-Generated Subjective Global Assessment(PG-SGA)and modified PG-SGA(mPG-SGA). Methods:A total of 2,000 cancer patients were consecutively screened using the Nutritional Risk Screening 2002 instrument on ad-mission.Patients at nutritional risk(Nutritional Risk Screening 2002 score≥3)were enrolled to obtain the complete GLIM,PG-SGA,and mPG-SGA criteria.To evaluate the convergent validity,Spearman correlation analysis was used to compare the test-retest reliability of the GLIM criteria and its results with the scores of various nutritional tools and objective parameters.Kruskal-Wallis tests and χ2 tests were used to test the discriminant validity among groups with different nutritional status.We calculated the sensitivity,specificity,positive predictive value,and negative predictive value for the various tools. Results:There were 562 patients found to be at nutritional risk,accounting for 28.1%of all patients.One hundred seventy-four patients(8.7%)were diagnosed as moderately malnourished,and 333 patients(16.6%)were severely malnourished based on the PG-SGA.When assessed using the GLIM criteria,185 patients(9.3%)were diagnosed as moderately malnourished and 311 patients(15.5%)were severely malnourished.The content validity of the GLIM criteria was 95%,evaluated by 60 medical staff members.The test-retest reliability was good.For the diagnosis of malnutrition versus the PG-SGA,the sensitivity of the GLIM was"good"(90.5%;95%confidence interval[95%CI]=88.0%-93.1%),with a positive predictive value of 92.5%(95%CI=90.2%-94.9%),but the spec-ificity and negative predictive value were"poor."Similar results were obtained when the mPG-SGA was used as the criterion. Conclusions:Overall,this cross-sectional study suggests that the GLIM criteria comprise a valid and reliable tool to assess the nutri-tional status of Chinese cancer patients.

Current Situation and Discussion of “Going Abroad” in Higher Vocational Colleges Under the Background of the Belt and Road Initiative

The Belt and Road Initiative has brought unprecedented development opportunities for domestic higher vocational colleges to“go abroad,”but it has also brought severe challenges.Driven by the Belt and Road Initiative,the development of higher vocational colleges“going abroad”has been confronted with a series of challenges,including the imperfect connection of policies,the lack of internal funds,as well as international standards,which are important factors affecting their development.Therefore,it is necessary to start from three aspects,which are policy guarantee,financing,and docking international standards.Through in-depth study of“going abroad”with tthe Belt and Road Initiative,we can effectively reduce the adverse impact of“going abroad”and provide a better and more innovative development environment for higher vocational colleges.

希夏邦马峰地区始新世地壳加厚和隆升过程

中新世中期之前喜马拉雅山脉的隆升历史和深部动力机制,还存在极大的争议、缺乏基本的数据约束。喜马拉雅造山带核部高级变质岩的埋藏和折返过程可以约束地壳加厚和山脉隆升过程,但是现有的变质记录主要为渐新世晚期-中新世中期,始新世变质作用的分布范围、形成过程和地质意义仍然未被充分挖掘。本文首先厘定了希夏邦马峰(8027m)山体的基本岩石组成:下部为高喜马拉雅正/副片麻岩,上部为肉切村群变粒岩及贯入其中的淡色花岗岩席。进一步对1964年希夏邦马峰登山科考采集的眼球状片麻岩进行了变质作用相平衡模拟和独居石微区原位U-Th-Pb定年,确定了始新世变质记录的P-T-t演化轨迹:M1阶段中P/T型变质压力峰期,条件为~1.0GPa、~740℃(~22℃/km),变质年龄为~37Ma;后近等温降压至M2阶段低P/T型变质温度峰期,条件为0.5~0.4GPa、~760℃(45~57℃/km),变质年龄为~25Ma;在~18Ma左右冷却至固相线以下。希夏邦马峰~37Ma的中P/T型变质和地壳加厚事件与北喜马拉雅穹隆、高喜马拉雅主体、前陆飞来峰等地区的记录一致(40~37Ma,20~25℃/km),表明印度-亚洲初始碰撞约20Myr后中上地壳被堆叠埋藏至>33km以下,发生了广泛的整体性加厚和深熔作用。该事件与喜马拉雅内陆残留海最终退却的时间吻合,是喜马拉雅山脉初始隆升的诱因。喜马拉雅山脉不是晚新生代以来隆升的,而是经历了自始新世中期以来的长期地壳堆叠和隆升过程。

习近平文化思想的哲学阐释

习近平文化思想是习近平新时代中国特色社会主义思想的重要组成部分,是新时代中国共产党领导文化建设实践经验的理论概括和科学总结。习近平文化思想深刻体现了新时代中国共产党人文化主体性的守正创新,以“两个结合”为深厚底蕴,坚持民族性与世界性相融通,将“魂脉”与“根脉”相结合,在认识论、历史观和辩证法层面实现了对马克思主义哲学的时代创新。习近平文化思想正面回应了西方文明的现代性困境,聚焦西方现代文明的自反性问题和价值异化倾向,提出构建人类命运共同体与创造人类文明新形态的科学论断。习近平文化思想坚持守正与创新相结合、坚持主体性与多样性相融汇、坚持理论与实践相贯通,在实践中深化了对中国特色社会主义文化建设规律的深刻认识,展现了习近平文化思想蕴含的哲学意蕴,必将在新时代中国特色社会主义文化建设中展现思想伟力,在担当新时代新的文化使命中彰显马克思主义的真理力量。

“一带一路”高等教育国际化智库建设研究

高等教育国际化智库是推动“一带一路”沿线国家高等教育国际化进程的重要思想库。该智库建设有助于推动“一带一路”高质量发展。“一带一路”高等教育国际化智库围绕“一带一路”高等教育改革与高等教育国际合作中的战略性、前瞻性、系统性问题开展战略研究和政策研究,是为“一带一路”高等教育国际化发展提供决策咨询的思想库。该智库承担着助推“一带一路”倡议的持续发展,服务构建“一带一路”高等教育共同体,以及培养高等教育国际化人才的使命。因此,“一带一路”高等教育国际化智库应具有包容互鉴、协同共建、互通互信、国际化、面向未来五个特征,并围绕以下四个着力点进行建设:一是明确发展理念,落实高等教育国际化智库的使命担当;二是秉持开放合作,搭建高等教育国际化合作框架;三是促进融合互通,共享高等教育发展资源;四是以质量为核心,提高高等教育国际化智库影响力。

初期雨水调蓄池单位面积调蓄深度数值模拟

单位面积调蓄深度决定了初雨调蓄池的设计容积和截污效果,但仅仅根据规范的推荐取值缺少对后果的量化判断。忽略管道中的沉积和冲刷,分别以单子汇水区和多子汇水区排水系统为例,针对不同下垫面特征和降雨特征,在SWMM模型中进行多降雨条件模拟,计算得到产流和悬浮固体(SS)的冲刷情况。结果表明,单子汇水区单次降雨初期冲刷主要受污染物积累程度、初雨峰值雨强和初雨总量控制,对多场降雨的初雨SS控制率均很高;多子汇水区系统不同场次降雨SS削减率可能有明显差异,SS控制率随调蓄深度增加而增加且差异减小,单位面积调蓄深度取2 mm时SS控制率已达较高水平,但4 mm以上时SS控制率增速明显减慢;初期雨水调蓄池是否达到了污染控制目标,不应只看是否位于系统的上游,也不只限于根据技术规范的推荐取值,需通过模型计算判断。

对外直接投资与企业ESG表现——基于“一带一路”倡议的经验证据

本文运用中国沪深A股制造业上市公司2010—2020年数据,以“一带一路”倡议为准自然实验,探讨企业OFDI对ESG的影响及ESG调整动机。研究发现,中国企业通过参与“一带一路”倡议进行OFDI显著提高了ESG水平,尤其是环境维度的ESG。随着OFDI深入推进,企业ESG的改善效应逐步增强。OFDI更有助于提升国际化经验不足企业和投资到可持续发展目标较高东道国企业的ESG水平。此外,当面临严格的制度约束时,企业OFDI对ESG的提升效应更大,且制度约束主要作用于环境维度的ESG;若企业高阶资源较为丰富,则其ESG改善幅度更大,且主要表现为社会和治理维度的ESG改善效应。本文的研究丰富了我国企业对“一带一路”沿线国家直接投资的ESG改善效应研究,并为推动我国企业ESG建设提供了理论支持和经验证据。

“三大倡议”与新时期中国的中亚外交

自2021年以来,习近平主席相继提出了全球发展倡议、全球安全倡议和全球文明倡议三大全球性倡议。“三大倡议”不仅为解决全球性问题提供了重要方案,而且为中国的中亚外交提供了理论支持和战略引领。中国同中亚五国是命运与共的好邻居、好朋友、好伙伴、好兄弟。三十多年来,中国的中亚外交取得了令人瞩目的巨大成就。当前,中国应以全球发展倡议为引领,推动中国与中亚国家实现共同发展;以全球安全倡议为引领,助力中国与中亚国家实现共同安全;以全球文明倡议为引领,促进中国与中亚国家实现民心相通与文明互鉴,进而促进中国与中亚国家走上更加稳定和友好的发展轨道,并保障中国—中亚命运共同体的构建取得更多切实成效。

基于河涌纳污能力的特大城市中心城区初期雨水截流标准

为有效控制和治理特大城市中心城区排水系统溢流的初期雨水污染,选取广州市猎德涌和石井河作为典型河涌,在对初期雨水水质及降雨特征进行分析的基础上,复核水域纳污能力,对比分析截流雨量与污染物削减效率,提出了初期雨水治理的截流标准。结果表明,广州市中心城区合流制区域的初雨截流标准宜为8~10 mm,分流制区域的取值宜为5~6 mm。研究结果可为广州市等特大城市中心城区初期雨水污染治理提供科学依据。

马克思、恩格斯关于历史主动精神的论述和现实启示

历史主动精神植根于唯物史观,是指无产阶级在遵循历史规律的前提下主动创造历史的精神品质。这种精神在重大历史关头表现得更为鲜明,其本质是人的主观能动性的发挥。马克思、恩格斯关于历史主动的论述使用了“历史主动性”“主动精神”“历史首创精神”等核心概念。围绕这些核心概念,马克思、恩格斯以人民群众、无产阶级和无产阶级政党为主体展开了关于历史主动精神的论述。其内涵主要包括主动斗争精神、主动创造精神和主动引领精神。马克思、恩格斯关于历史主动精神的论述为马克思主义的发展与传播奠定了基础,也推动了共产主义运动和中国革命的发展。探究马克思、恩格斯关于历史主动精神的论述有助于在新征程中彰显中国共产党人的马克思主义立场,激发更为主动的精神力量。