Beijing Research Articles

Estimation of anthropogenic CO2 emissions at different scales for assessing SDG indicators: Method and application

The increasing concentration of atmospheric CO2 is one of the major causes of global warming. Accurate estimation of anthropogenic carbon emissions is significant for the government to monitor CO2 emissions timely and formulate emission reduction policies. To explore the application potential of interannual carbon emission distribution estimated by remotely-sensed data in monitoring carbon-related indicators of SDGs, this study constructed 0.2° grid-scale and municipal-scale anthropogenic CO2 emission models in mainland China and calculated carbon intensity and total CO2 emissions from 2015 to 2020. SDG indicator 9.4.1 and 13.2.2 were used as model indicators to evaluate the achievement of cities in each province. The experimental results show that all cities in Shanxi, Jiangsu, Zhejiang, and Guizhou Province, as well as Beijing, Chongqing, and Shanghai City, have reached the indicator 9.4.1. For the indicator 13.2.2, 15.6% of the cities have successfully controlled the growth of total carbon emissions, among which the Yangtze River Delta controlled well while that in the western region were slowly decreasing. Other cities still have a certain distance to reach the indicator 9.4.1 and 13.2.2. Using remote sensing data to quantify anthropogenic CO2 emissions at different scales can assist local governments in monitoring key energy-using units according to the emission distribution results and can also effectively solve the problems of lagging, absent and opacity of carbon emission statistics. It can provide indirect evidences for assessing local SDG indicators and technical support for relevant institutions to make decisions based on local conditions.

Association between Covid-19 vaccination and incidence of type 1 diabetes in China: Evidence from 14.14 million registered residents between 2007 and 2021

AimsReports have suggested that COVID-19 vaccination may cause Type 1 diabetes (T1D), particularly fulminant T1D (FT1D). This study aimed to investigate the incidence of T1D in a general population of China, where>90% of the people have received three injections of inactivated SARS-Cov-2 vaccines in 2021. MethodsA population-based registry of T1D was performed using data from the Beijing Municipal Health Commission Information Center. Annual incidence rates were calculated by age group and gender, and annual percentage changes were assessed using Joinpoint regression. ResultsThe study included 14.14 million registered residents, and 7,697 people with newly diagnosed T1D were identified from 2007 to 2021. T1D incidence increased from 2.77 in 2007 to 3.84 per 100,000 persons in 2021. However, T1D incidence was stable from 2019 to 2021, and the incidence rate did not increase when people were vaccinated in January-December 2021. The incidence of FT1D did not increase from 2015 to 2021. ConclusionsThe findings suggest that COVID-19 vaccination did not increase the onset of T1D or have a significant impact on T1D pathogenesis, at least not on a large scale.

Improved 3D Shallow‐Deep Vs Structure in Tongzhou, Beijing (China), Revealed by Dense Array Ambient Noise Tomography

AbstractShear‐wave velocity (Vs) structures can reveal the shallow sediment thickness and deep tectonic features of buried faults and geological units. They are important for reducing seismic and geological disasters in urban areas. Based on ambient noise data from the Tongzhou dense array (919 seismographic stations), we obtain a fine shallow‐deep (0–5 km) 3D Vs model, by jointly inverting the phase‐velocity dispersions of Rayleigh waves, including short‐period (0.3–2 s) multimode dispersions using the frequency‐Bessel transform method and the long‐period (2–6 s) fundamental‐mode dispersions using the fast marching method. Our results show that the Vs inhomogeneities agree well with the distribution of geological units. We use the 1 km/s isodepth of Vs as the reference thickness of quaternary sediments. Fengbo sag (FBS) and Dachang sag (DCS), which mainly show low velocity and density, have thick sediment thicknesses (approximately 550–600 and 320–420 m, respectively). The NE high‐velocity belt in Daxing high (DXH) has a thinner sediment thickness (∼230 m). Thus, FBS and DCS have a greater risk of earthquake hazards owing to the strong amplification effects of ground motion. Additionally, Vs distribution in the FBS, DCS, DXH, and Yanshan Fold Belt are spatially related to the medium density and buried faults (Nanyuan‐Tongxian, Daxing, and Xiadian faults). We infer that the Vs structures are associated with the controlling effects of these large normal faults and inhomogeneous strata density. The discontinuity of the NE high‐velocity belt in DXH probably results from the intense tectonic activity of Nankou‐Sunhe fault.

Optimized concurrent hearing and genetic screening in Beijing, China: A cross-sectional study.

Concurrent screening has been proven to provide a comprehensive approach for management of congenital deafness and prevention of ototoxicity. The SLC26A4 gene is associated with late-onset hearing loss and is of great clinical concern. For much earlier detection of newborns with deafness-causing mutations in the SLC26A4 gene, the Beijing Municipal Government launched a chip for optimized genetic screening of 15 variants of 4 genes causing deafness based on a chip to screen for 9 variants of 4 genes, and 6 variants of the SLC26A4 gene have now been added. To ascertain the advantage of a screening chip including 15 variants of 4 genes, the trends in concurrent hearing and genetic screening were analyzed in 2019 and 2020. Subjects were 76,460 newborns who underwent concurrent hearing and genetic screening at 24 maternal and child care centers in Beijing from January 2019 to December 2020. Hearing screening was conducted using transiently evoked otoacoustic emissions (TEOAEs), distortion product otoacoustic emissions (DPOAE), or the automated auditory brainstem response (AABR). Dried blood spots were collected for genetic testing and 15 variants of 4 genes, namely GJB2, SLC26A4, mtDNA 12S rRNA, and GJB3, were screened for using a DNA microarray platform. The initial referral rate for hearing screening decreased from 3.60% (1,502/41,690) in 2019 to 3.23% (1,124/34,770) in 2020, and the total referral rate for hearing screening dropped form 0.57% (236/41,690) in 2019 to 0.54% (187/34,770) in 2020, indicating the reduced false positive rate of newborn hearing screening and policies to prevent hearing loss conducted by the Beijing Municipal Government have had a significant effect. Positivity according to genetic screening was similar in 2019 (4.970%, 2,072/41,690) and 2020 (4.863%,1,691/34,770), and the most frequent mutant alleles were c.235 del C in the GJB2 gene, followed by c.919-2 A > G in the SLC26A4 gene, and c.299 del AT in the GJB2 gene. In this cohort study, 71.43% (5/7) of newborns with 2 variants of the SLC26A4 gene were screened for newly added mutations, and 28.57% (2/7) of newborns with 2 variants of the SLC26A4 gene passed hearing screening, suggesting that a screening chip including 15 variants of 4 genes was superior at early detection of hearing loss, and especially in early identification of newborns with deafness-causing mutations in the SLC26A4 gene. These findings have clinical significance.

경극과 판소리 화용도의 사설 비교 연구

This study compared and analyzed saseol (texts like lyrics and dialogues) of Chinese Peking opera Hwayongdo (華容道 The Huarong Path) and the passage of 'Hwayongdo' in Korean pansori (musical storytelling) Jeokbyeokga. To this end, reviewing the written materials related to the Peking opera Hwayongdo, it found that it was first included under the title Dangcao in Chewangfu quben, a collection of librettos of early Peking opera works from the mid-Qing Dynasty (1636-1912).
 The title Hwayongdo was first used in the 'Qingshengping ban ximu' (repertoire of plays by the Qingshengping troupe) of the Chinese literature Dao Xian yilai Liyuan xinian xiaolu (a small record of the theater from the Daoguang and Xianfeng) at the 4th year of the Daoguang Emperor (1824).
 The results of comparing the saseol of the Peking opera Hwayongdo included in Jingju chuantong juben huibian (a collection of traditional Peking opera scripts) with that of 'Hwayongdo' in Jeokbyeokga performed by Song Sun-seop are as follows. First, the Hwayongdo of the two countries were different in terms of saseol composition by each section. Scenes were added to the beginning section in Peking opera whereas they were added in the middle and final sections in pansori. Second, the development of saseol contents was generally similar, but there were differences in the focal point of the description. Pansori 'Hwayongdo' had a strong tendency to express the character's way of speaking, expression, and appearance vividly and realistically. However, the Peking opera Hwayongdo was concisely organized around the plot.
 This phenomenon is not only because Chinese audiences are more familiar with the contents of the novel The Romance of the Three Kingdoms , but also because the dialogue, acting, and makeup of Peking opera actors were able to vividly express Hwayongdo and thus a realistic description was unnecessary. On the other hand, Korean audiences would have been very curious about the exotic subject matter and characters appearing in 'Hwayongdo' and to satisfy this curiosity, a more detailed description and added content would have been needed.
 This study are significant in that they confirm how the traditional performing art of China and Korea, both based on the same novel The Romance of the Three Kingdoms , has developed as different types of contents in the process of accommodating the performance environment and the taste of audiences.

Level of evidence supporting the Chinese cardiovascular disease clinical practice guidelines and its evolution in the past two decades

Clinical practice is guided by guidelines in the era of evidence-based medicine to improve healthcare. The consistency between the strength of recommendations and the underlying quality of evidence in clinical guidelines and its evolution dynamically reflects the status of medical practice in important aspects. This study aimed to evaluate the levels of evidence (LOEs) supporting different classes of recommendations (CORs) in Chinese cardiovascular disease (CVD) guidelines between 2003 and 2021, and changes over time. Clinical guideline documents on cardiovascular topics issued by leading professional organizations were retrieved in the Databases of SinoMed and Wanfang Med Online from inception to June 2021. All guidelines were screened through abstract and full-text reading, and included if satisfying the pre-specified criteria. 79 Chinese guideline documents on 12 sub-topics including a total of 5195 recommendations and the designated CORs/LOEs, were abstracted. The number of recommendations of Class Ⅰ, Class Ⅱ, Class Ⅲ, LOE A, LOE B, and LOE C were identified for each guideline document. The proportion of CORs, LOEs, and COR-LOE combinations in guidelines and the changes among those with ≥2 versions. A total of 79 guidelines were included in the analysis. When examining the status of current guidelines, among the 3325 recommendations derived from 59 documents during 2011-2021, 735 recommendations (22.1%) were classified as LOE A, 1280 (38.5%) as LOE B, and 1310 (39.4%) as LOE C. 596 recommendations (17.9%) were characterized as Class Ⅰ-LOE A, accounting for the majority of LOE A recommendations but only one-third of Class I recommendations. Evidence levels varied greatly across different sub-topics and individual guidelines. There are 9 guidelines on 5 sub-topics having ≥2 versions. When analyzing the changes over time, although an increase was observed in the total number of recommendations, the proportion of recommendations designated as Class Ⅰ-LOE A did not significantly improve (19.1% [current] vs 19.0% [prior], p=0.97). In current Chinese CVD guidelines, the high level of evidence lacks, and its alignment with strong recommendations is deficient. Although it shows moderate improvements in certain major topics (e.g., coronary artery disease, interventional therapy, surgery) in the past two decades, the overall proportion of Class I-LOE A recommendations remains small, suggesting that conduction, and particularly translation, of high-quality studies like RCTs addressing CVDs-related questions are still essential and demanded, especially for areas with less attention. This study was supported by Beijing Nova Program from Beijing Municipal Science & Technology Commission (Z211100002121063, Z201100006820002); Fundamental Research Funds for the Central Universities (3332022023); National Key R&D Program of China (2020YFC2004705); CAMS Innovation Fund for Medical Sciences (2021-I2M-5-003); National Natural Science Foundation of China (81825003, 91957123, 82270376).

The observed features and some possible reasons of annual temperature extremes over Beijing‐Tianjin‐Hebei region for a century long‐term based on newly constructed daily observations

AbstractThe observation facts of trend and variability are estimated for a century‐long timescale, as well as some possible attributions affecting temperature extremes over Beijing‐Tianjin‐Hebei region. In this paper, the new constructed daily maximum and minimum temperature series during the last 100 years in situ stations of Beijing, Tianjin and Baoding city are used, and two 30‐year baseline climatology of 1961–1990 and 1980–2010 are both used in calculating extreme temperature events. The results indicate that there are long‐lasting, frequent and serious extreme warming over Beijing‐Tianjin‐Hebei region, especially for extreme low temperature, with larger declining trends (at 5% significance) from 1981 to 2010 baseline than those from 1961 to 1990 baseline. And from a statistical perspective, El Niño decay years and surface sea temperature (SST) anomalies at some typical ocean regions of the Arabian Sea and the Bengal Bay on the northern Indian Ocean, the Western Pacific and the Mid Atlantic, Southern Indian Ocean and around 45°–85°E, 68°–82°N on the southwest Arctic Ocean can be used as the warning signals denoting extreme warming over Beijing‐Tianjin‐Hebei region. Additionally, urbanization has a significant (at 5% significance) effect on extreme warming over Beijing‐Tianjin‐Hebei region since 1979, with 24.3% warming contribution for annual minimum temperature.

Lipid lowering effects and safety of evolocumab in Chinese patients at very high cardiovascular risk: a single-center study.

Lipid lowering effects and safety of evolocumab in Chinese patients at very high cardiovascular risk: a single-center study.

Development of a Causal Model of Factors Affecting Learner Satisfaction with Online Teaching of Primary School Students in Beijing China

This study aims to explore learner satisfaction with the online teaching level of primary school to develop a causal model of learner satisfaction with the online teaching level of primary school students in Beijing, China and validate a model with empirical data. A mixed method of data collection was employed in this study, where the questionnaire was distributed among the primary school learners from the fourth, fifth and sixth grades school students of the total of 752 primary school students were randomly selected to participate in the questionnaires in Beijing, China and five students were selected to participate in the interview. The model was successfully constructed and validated with empirical data showing the measurement model is valid and well fitted to empirical data (x²=496.262，df=486，p=0.364，GFI=0.946, AGFI=0.938). The results indicated that Learner satisfaction with online teaching level of primary school students in Beijing， China, 3.762, which is close to the satisfaction of learners who "agree" with online teaching.

Comparative analysis of prevention and control measures toward COVID-19 epidemic between Shanghai and Beijing.

By serving and providing a guide for other regional places, this study aims to advance and guide the epidemic prevention and control methods, and practices and strengthen people's ability to respond to COVID-19 and other future potential public health risks. A comparative analysis was conducted that the COVID-19 epidemic development trend and prevention and control effects both in Beijing and Shanghai. In fact, regarding the COVID-19 policy and strategic areas, the differences between governmental, social, and professional management were discussed and explored. To prevent and be ready for potential pandemics, experience and knowledge were used and summarized. The strong attack of the Omicron variant in early 2022 has posed challenges to epidemic prevention and control practices in many Chinese cities. Shanghai, which had achieved relatively good performance in the fight against the epidemic, has exposed limitations in its epidemic prevention and control system in the face of Omicron. In fact, the city of Beijing has undertaken prompt and severe lockdown measures and achieved rather good results in epidemic prevention and control because of learning from Shanghai's experience and lessons; adhering to the overall concept of "dynamic clearing," implementing precise prevention and monitoring, enhancing community control, and making emergency plans and preparations. All these actions and measures are still essential in the shift from pandemic response to pandemic control. Different places have introduced different urgent policies to control the spread of the pandemic. Strategies to control COVID-19 have often been based on preliminary and limited data and have tended to be slow to evolve as new evidence emerges. Hence, the effects of these anti-epidemic policies need to be further tested.

Characteristics and Source Apportionment of Atmospheric Ion Deposition During Winter and Spring in the Core Area of Beijing

In recent years, the Ministry of Ecology and Environment and the Beijing Municipal Government have continuously strengthened the control indicators of dustfall. In order to grasp the characteristics and sources of ion deposition in dustfall, the filtration method and ion chromatography were used to determine the dustfall and ion deposition during winter and spring in the core area of Beijing, and the PMF model was carried out to analyze the sources of ion deposition. The results indicated:① the average values of ion deposition and its proportion in dustfall were 0.87 t·(km2·30 d)-1 and 14.2%, respectively. The dustfall and ion deposition on working days were 1.3 times and 0.7 times that on rest days, respectively. ② The coefficient of determination in the linear equations between ion deposition and precipitation, relative humidity, temperature, and average wind speed were 0.54, 0.16, 0.15, and 0.02, respectively. In addition, the coefficient of determination in the linear equations between ion deposition and PM2.5 concentration and dustfall were 0.26 and 0.17, respectively. Therefore, controlling the concentration of PM2.5 was crucial to treating ion deposition. ③ Anions and cations accounted for 61.6% and 38.4%, respectively, in the ion deposition, and SO42-, NO3-, and NH4+ accounted for 60.6% in total. The ratio of anion and cation charge deposition was 0.70, and the dustfall was alkaline. The ρ(NO3-)/ρ(SO42-) in the ion deposition was 0.66, which was higher than that of 15 years ago. ④ The contribution rates of secondary sources, fugitive dust sources, combustion sources, snow-melting agent sources, and other sources were 51.7%, 17.7%, 13.5%, 13.5%, and 3.6%, respectively.

Gender perspective as the consumer behavior of buying organic rice: A case study in China and Thailand

Organic farming is being rapidly growing in developing countries such Thailand and China as well. Food safety and quality issues have sparked consumers’ awareness and make them to be doubtful towards conventional food products as consequence citizens of developed countries have shown a significant interest towards organic products. Data for the study were collected in Bangkok Thailand and Beijing China from 100 consumers. The sampling was carried using a multi-stage method. The results of t-tests revealed that those unaware of organic food group topped the six-point scale statement, for females 2.0909, and for the males 2.0000 which implies that majority of the males were comparatively unaware of organic foods or the benefit of organic food. Furthermore, the group of don’t trust the label/ don’t think it is really a certified organic food fell into the second category from the results of the t- test in which males 0.7407, and for the females 2.1096 were significant. The findings indicated that consumer’s willingness to pay for organic food is influenced by some characteristics such as nutritive value, taste, freshness, appearance, colour and other sensory characteristics.

Evaluating the optimised font size and viewing time of online learning in young children: a multicentre cross-sectional study

ObjectivesNear viewing distance (VD) and longer viewing times are associated with myopia. This study aimed to identify the font size and viewing time that guarantee the appropriate VD and pixels...

The Epistolary Heritage of the Mongolist V. L. Kotvich (1872–1944) about Teaching the Mongolian Language in Russia at the Beginning of the 20th Century

2022 marked the 150th anniversary of the birth of an outstanding orientalist and teacher Vladislav Lyudvigovich Kotvich. His early days took place at St. Petersburg University, and his further fruitful activity (until 1923) was associated with scientific and educational institutions of the northern capital of Russia. The article aims to introduce into scientific circulation a previously unknown letter from the teacher of Chita Teachers’ Seminary Innokenty Porfiryevich Malkov to Vladislav Ludwigovich, which reflects the development of teaching the Mongolian language in Transbaikalia. The letter reveals the name of the unfairly forgotten teacher of the Mongolian language Innokenty Malkov, who was competent, responsible, understood the essence of teaching methodology, its features, the importance of knowledge and ability to teach not only the written language of the Mongols but also the variety of its dialects. This document can clarify little-known facts in the biography of V. L. Kotvich – an organizer of oriental education in Russia. Thus, the letter under consideration is a source on the history of Mongolian studies in Russia of the early 20th century, reflecting the development and state of Oriental education in one of the border regions of Russia, where the teaching of the Mongolian language was of practical importance – it was necessary to train translators for maintaining relations with China and Mongolia. The author of the letter also emphasized the problems in training teachers of the Mongolian-Buryat language, such as the lack of teaching staff and teaching aids. At the same time, the information presented in the letter proves the continuity of the traditions of the Russian school of Mongolian studies established by O. M. Kovalevsky, which can be traced in the description of teaching methods by I. Malkov. He described such methods as reading practical documents, using materials of the Society of Oriental Studies in St. Petersburg. The Oriental Academy was founded under the leadership of A. M. Pozdneev, an adherent of practical Oriental studies, whose teaching methods were introduced by Malkov in the seminary: he taught the fundamentals of history, geography, literature simultaneously with the study of the language and practiced reading business papers. Despite the remoteness of the region, the seminary teacher strived to acquire textbooks from reputable mongolists in order to achieve success in teaching the language.

Intercropped Amygdalus persica and Pteris vittata applied with additives presents a safe utilization and remediation mode for arsenic-contaminated orchard soil

Intercropping the arsenic (As) hyperaccumulator Pteris vittata with fruit trees can safely yield peaches in As-polluted orchards in South China. However, the soil As remediation effects and the related mechanisms of P. vittata intercropped with peach trees with additives in the north temperate zone have rarely been reported. A field experiment was conducted to systematically study the intercropping of peach (Amygdalus persica) with P. vittata with three additives [calcium magnesium phosphate (CMP), ammonium dihydrogen phosphate (ADP), and Stevia rebaudiana Bertoni residue (SR)] in a typical As-contaminated peach orchard surrounding a historical gold mine in Pinggu County, Beijing City. The results showed that compared with monoculture (PM) and intercropping without addition (LP), the remediation efficiency of P. vittata intercropping was significantly increased by 100.9 % (CMP) to 293.5 % (ADP). CMP and ADP mainly compete with available As (A-As) adsorbed to the surface of Fe-Al oxide through PO43−, while SR might activate A-As by enhancing dissolved organic carbon (DOC) in P. vittata rhizospheres. The photosynthetic rates (Gs) of intercropped P. vittata were significantly positively correlated with pinna As. The intercropping mode applied with the three additives did not obviously affect fruit quality, and the net profit of the intercropping mode (ADP) reached 415,800 yuan·ha−1·a−1. The As content in peaches was lower than the national standard in the intercropping systems. Comprehensive analysis showed that A. persica intercropped with P. vittata applied with ADP is better than other treatments in improving risk reduction and agricultural sustainability. In this study, a theoretical and practical basis is provided for the safe utilization and remediation of As-contaminated orchard soil in the north temperate zone.

Multi-omics fusion analysis models with machine learning predict survival of HER2-negative metastatic breast cancer: a multicenter prospective observational study.

Multi-omics fusion analysis models with machine learning predict survival of HER2-negative metastatic breast cancer: a multicenter prospective observational study.

The Brain Aging National Cohort-PUMC: study design and baseline characteristics

Objectives: To describe the study design and baseline characteristics of the Brain Aging National Cohort (BANC)-Peking Union Medical College (PUMC), a study aiming to identify risk and protective factors that contribute to brain aging and age-related neurological diseases. Methods: The BANC-PUMC is a longitudinal study established in 2017 in the city of Beijing, enrolling participants who agreed to donate their bodies and brains for medical research. Participants received face-to-face clinical evaluations including questionnaires, physical examinations, and comprehensive cognitive assessments. Biological samples and brain magnetic resonance images were collected. Neuropathological evaluation of the autopsied brain is performed. Results: Among the 885 participants, 43.3% were men, and the mean age of the cohort was 71.3 ± 8.2 years. The participants were predominantly equipped with high-level education, and they had an average of 12 years (SD 3.6) of education. The most common chronic disease of participants was hypertension (61.4%). The proportion of Mini-Mental State Examination scores below 24 was 4.3%. The cohort has been followed up annually. Conclusions: The BANC-PUMC study has the potential to unravel the causes and consequences of age-related neurological diseases via a clinicopathological correlation study. The program will continue and allow further follow-up and extension of current investigations.

Comparing relationships between urban heat exposure, ecological structure, and socio-economic patterns in Beijing and New York City

Comparing relationships between urban heat exposure, ecological structure, and socio-economic patterns in Beijing and New York City

Twice-daily injections and multiple daily injections of insulin in toddlers with type 1 diabetes: a retrospective cohort study.

Twice-daily injections and multiple daily injections of insulin in toddlers with type 1 diabetes: a retrospective cohort study.

Parental support and bullying bystander behaviors in Chinese adolescents: Longitudinal mediation through social harmony.

Bullying in schools is a serious concern worldwide. The active defending or passive bystanding behaviors of bullying bystanders significantly contributes to the prevention of bullying. Relevant studies have increasingly adopted a social-ecological system approach in bullying research. However, the role of parental factors (microsystem) and cultural value (macrosystem) factors in adolescents' bullying behaviors in non-western culture contexts is unclear. Social harmony, which is closely related to social behavior, is a core value in Chinese culture. Exploring the role of social harmony in bullying bystanders in China could enhance our understanding of bullying, and enrich the diversity of the literature. This study aimed to examine the mediation effects of social harmony on the associations between parental support and the bullying bystanders among Chinese adolescents. The participants comprised 445 Chinese adolescents (mean age = 14.41, SD = 0.51) from Beijing City, China. A 17-month, two-point longitudinal study was conducted. Parental support, social harmony, and the behavior of bullying bystanders were evaluated at two time points. The hypothesized mediation model was examined using a structural equation modeling approach using bootstrapping techniques. The results showed that social harmony partly mediated the positive relationship between adolescents' parental support and active defending behaviors, and fully mediated the negative relationship between adolescents' parental support and passive bystanding behaviors. These results highlight the importance of studying parental and cultural values in research on bullying bystanders.