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  1. Conference proceedings ; Online: ShakeMap model with deviation correction method of the 21 may 2021 M6.5 Yangbi, Yunnan, China

    Chen, K.

    XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)

    2023  

    Abstract: On May 21, 2021, a magnitude 6.4 earthquake struck Yangbi County, Yunnan Province, China. This article used the collected 21 seismometers and the strong seismic observation data of 304 intensity meters, comprehensively considered the geological structure ...

    Abstract On May 21, 2021, a magnitude 6.4 earthquake struck Yangbi County, Yunnan Province, China. This article used the collected 21 seismometers and the strong seismic observation data of 304 intensity meters, comprehensively considered the geological structure background, source mechanism solution and aftershock distribution of seismic faults. As a result, the ground motion intensity distribution map of this earthquake was quickly calculated using the deviation correction method of magnitude translation. The strong seismic observation data showed that the maximum horizontal peak acceleration was 720.3cm/s 2 observed at the Yangbi Observatory with an epicenter 79km away. The peak horizontal acceleration observed by 14 stations > 45cm/s 2, . A large number of long-range, small-scale observation records reflect the ground motion attenuation characteristics of this earthquake to a certain extent. The deviation correction method for magnitude translation used in this paper can minimize the relationship between station observations and attenuation. It is a systematic deviation of the estimates, thereby reducing the uncertainty of the estimation of ground motion parameters in areas where stations are missing.
    Subject code 333
    Language English
    Publishing country de
    Document type Conference proceedings ; Online
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  2. Article ; Online: Holistic understanding of ventilation rate in occupational health risk control.

    Chen, Kang

    Annals of the New York Academy of Sciences

    2023  Volume 1531, Issue 1, Page(s) 3–11

    Abstract: Throughout the history of occupational health risk control, ventilation has been implemented widely as a tried-and-true method to reduce exposure intensity to airborne contaminants. Proper determination of the ventilation rate merits careful ... ...

    Abstract Throughout the history of occupational health risk control, ventilation has been implemented widely as a tried-and-true method to reduce exposure intensity to airborne contaminants. Proper determination of the ventilation rate merits careful consideration when addressing concerns directed toward occupational health and indoor air quality in commercial buildings, albeit this does not translate well among the current engineering and scientific community. This article aims to facilitate a better understanding and proper determination of ventilation rates as a countermeasure for occupational health risk control. To that end, guidance is provided to select the appropriate ventilation rate for nonpandemic versus pandemic scenarios in terms of pertinent regulatory/professional codes and mathematical modeling tools. Limitations and assumptions of the models are summarized to facilitate proper application. Furthermore, the emerging DNA-based aerosol tracing technology, which helps to verify ventilation efficacy, is discussed.
    MeSH term(s) Humans ; Occupational Health ; Air Pollution, Indoor/prevention & control ; Ventilation
    Language English
    Publishing date 2023-12-05
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 211003-9
    ISSN 1749-6632 ; 0077-8923
    ISSN (online) 1749-6632
    ISSN 0077-8923
    DOI 10.1111/nyas.15087
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  3. Article ; Online: Comments on this Article Non-Contrast CT-Based Radiomics Score for Predicting Hematoma Enlargement in Spontaneous Intracerebral Hemorrhage.

    Chen, Kai

    Clinical neuroradiology

    2023  Volume 33, Issue 3, Page(s) 855

    MeSH term(s) Humans ; Cerebral Hemorrhage/diagnostic imaging ; Disease Progression ; Hematoma/complications ; Hematoma/diagnostic imaging ; Tomography, X-Ray Computed ; Retrospective Studies
    Language English
    Publishing date 2023-04-25
    Publishing country Germany
    Document type Letter ; Comment
    ZDB-ID 2234662-4
    ISSN 1869-1447 ; 0939-7116 ; 1869-1439
    ISSN (online) 1869-1447
    ISSN 0939-7116 ; 1869-1439
    DOI 10.1007/s00062-023-01281-3
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    Zs.A 3413: Show issues Location:
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  4. Article: [My favorite memory with the Chinese Journal of Cardiology].

    Chen, K J

    Zhonghua xin xue guan bing za zhi

    2023  Volume 51, Issue 3, Page(s) 215–216

    Language Chinese
    Publishing date 2023-03-16
    Publishing country China
    Document type Journal Article
    ZDB-ID 603425-1
    ISSN 0253-3758
    ISSN 0253-3758
    DOI 10.3760/cma.j.cn112148-20230112-00027
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  5. Article: The Construction of Interactive Teaching Quality Monitoring System From the Perspective of Psychology.

    Chen, Kewei

    Frontiers in psychology

    2022  Volume 13, Page(s) 849528

    Abstract: The article first proposes a reflection on the status quo of classroom teaching in public universities, selects a large number of educational scenes, and analyzes these selected educational concepts in detail from a theoretical perspective. Through the ... ...

    Abstract The article first proposes a reflection on the status quo of classroom teaching in public universities, selects a large number of educational scenes, and analyzes these selected educational concepts in detail from a theoretical perspective. Through the establishment of a teaching quality monitoring system based on careful observation and analysis, several major problems in public university classrooms have been discovered: poor classroom interaction mode, single classroom interaction mode, low classroom interaction efficiency, and inefficient classroom interaction feedback. Specific manifestations include the alienation of teacher-student relationship, insufficient student coverage, lack of interaction channels, lack of interaction context, only formalized teacher-student interaction, low impact, and simplification of teacher-student interaction. Summarizing the causes of classroom interaction problems, the article summarizes three factors: teachers, students, and the macro environment. In the experiment, 85% of the students thought that the teacher-student relationship was relatively ordinary. Among the 11 students who participated in the experiment, 60% of the students were very active in interactive classroom discussions. Therefore, based on the analysis of problems and factors, the article puts forward an optimization strategy to create a classroom interaction atmosphere, improve classroom interaction mode, improve classroom interaction efficiency, and strengthen classroom interaction feedback. In particular, it promotes the integration of teacher-student relationship, emphasizes the role of students, improves the level of classroom interaction, creates conditions for classroom interaction, improves teacher-student interaction control ability, enhances student interactive speech ability, strengthens error correction and feedback, and increases multiple feedback methods.
    Language English
    Publishing date 2022-02-22
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2563826-9
    ISSN 1664-1078
    ISSN 1664-1078
    DOI 10.3389/fpsyg.2022.849528
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  6. Article ; Online: 2D NMR peak profiling to compare chemical differences between batches of pentosan polysulfate sodium.

    Chen, Kang

    Journal of pharmaceutical and biomedical analysis

    2022  Volume 211, Page(s) 114589

    Abstract: Pentosan Polysulfate Sodium (PPS) is a semi-synthetic polysulfated xylan sourced from beechwood tree barks. PPS, which is mainly composed of a xylose chain with branched O-methyl-glucuronate (MGA), can have heterogeneity in monosaccharide species, ... ...

    Abstract Pentosan Polysulfate Sodium (PPS) is a semi-synthetic polysulfated xylan sourced from beechwood tree barks. PPS, which is mainly composed of a xylose chain with branched O-methyl-glucuronate (MGA), can have heterogeneity in monosaccharide species, sequence and chemical modifications including sulfation and acetylation. The monosaccharide composition in polysaccharide therapeutics is a frequently quoted quality attribute (QA), which has been assessed using two-dimensional (2D)
    MeSH term(s) Magnetic Resonance Imaging ; Magnetic Resonance Spectroscopy/methods ; Pentosan Sulfuric Polyester
    Chemical Substances Pentosan Sulfuric Polyester (37300-21-3)
    Language English
    Publishing date 2022-01-11
    Publishing country England
    Document type Journal Article
    ZDB-ID 604917-5
    ISSN 1873-264X ; 0731-7085
    ISSN (online) 1873-264X
    ISSN 0731-7085
    DOI 10.1016/j.jpba.2022.114589
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    Zs.A 1850: Show issues Location:
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  7. Book ; Online: An Adaptable IoT Rule Engine Framework for Dataflow Monitoring and Control Strategies

    Chen, Ken

    2023  

    Abstract: The monitoring of data generated by a large number of devices in Internet of Things (IoT) systems is an important and complex issue. Several studies have explored the use of generic rule engine, primarily based on the RETE algorithm, for monitoring the ... ...

    Abstract The monitoring of data generated by a large number of devices in Internet of Things (IoT) systems is an important and complex issue. Several studies have explored the use of generic rule engine, primarily based on the RETE algorithm, for monitoring the flow of device data. In order to solve the performance problem of the RETE algorithm in IoT scenarios, some studies have also proposed improved RETE algorithms. However, implementing modifications to the general rule engine remains challenges in practical applications. The Thingsboard open-source platform introduces an IoT-specific rule engine that does not rely on the RETE algorithm. Its interactive mode attracted attention from developers and researchers. However, the close integration between its rule module and the platform, as well as the difficulty in formulating rules for multiple devices, limits its flexibility. This paper presents an adaptable and user-friendly rule engine framework for monitoring and control IoT device data flows. The framework is easily extensible and allows for the formulation of rules contain multiple devices. We designed a Domain-Specific Language (DSL) for rule description. A prototype system of this framework was implemented to verify the validity of theoretical method. The framework has potential to be adaptable to a wide range of IoT scenarios and is especially effective in where real-time control demands are not as strict.

    Comment: 15 pages,10 figures
    Keywords Computer Science - Software Engineering
    Subject code 629
    Publishing date 2023-10-09
    Publishing country us
    Document type Book ; Online
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  8. Book: Progress in cell cycle control research

    Chen, K. L.

    2008  

    Author's details K. L. Chen, ed
    Keywords Cell Cycle ; Cell Cycle Proteins
    Language English
    Size XIII, 348 S. : Ill., graph. Darst.
    Publisher Nova Science Publ
    Publishing place New York
    Publishing country United States
    Document type Book
    HBZ-ID HT015852808
    ISBN 978-1-60456-797-7 ; 1-60456-797-X
    Database Catalogue ZB MED Medicine, Health

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    Shelf markLoan statusLocation
    2009 A 873 order for loan Magazin

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  9. Article ; Online: Study on the effects of ranibizumab as a pretreatment for vitrectomy in proliferative diabetic retinopathy: a retrospective cohort study.

    Zhou, H-W / Chen, K

    European review for medical and pharmacological sciences

    2022  Volume 26, Issue 16, Page(s) 5939–5945

    Abstract: Objective: The effects of intravitreal ranibizumab (IVR) as a pretreatment for vitrectomy in proliferative diabetic retinopathy (PDR) need further study. The aim of this study is to further analyze this topic.: Patients and methods: The study group ( ... ...

    Abstract Objective: The effects of intravitreal ranibizumab (IVR) as a pretreatment for vitrectomy in proliferative diabetic retinopathy (PDR) need further study. The aim of this study is to further analyze this topic.
    Patients and methods: The study group (n=26) was treated with IVR, while the control group (n=28) was not. The best corrected visual acuity (BCVA) at different time points within each group was compared. Operation time, intraoperative bleeding, silicone oil usage, iatrogenic retinal rupture and complications were compared between the groups.
    Results: BCVA at the 1st month after vitrectomy was significantly improved in the study group (t=2.081, p=0.047) but not in the control group (I=0.164, p=0.871). At the 1st month after vitrectomy, the BCVA of the study group was significantly higher than that of the control group (t=2.1467, p=0.0365). At the 6th month after vitrectomy, the BCVA of the study group was significantly higher than that of the control group (t=2.0424, p=0.0462). The operation time in the study group was significantly shorter than that in the control group (W=2.212, p<0.05). The rates of mild and severe intraoperative bleeding in the study group were significantly lower than those in the control group (p<0.05, respectively). There was no significant difference in complications between the two groups (p>0.05).
    Conclusions: IVR before vitrectomy in patients with PDR can significantly improve BCVA in the early stage, improve BCVA at the 6th month after the operation, reduce the operation time and reduce intraoperative bleeding.
    MeSH term(s) Angiogenesis Inhibitors/therapeutic use ; Diabetes Mellitus/drug therapy ; Diabetic Retinopathy/drug therapy ; Diabetic Retinopathy/surgery ; Humans ; Intravitreal Injections ; Ranibizumab/therapeutic use ; Retrospective Studies ; Treatment Outcome ; Vitrectomy
    Chemical Substances Angiogenesis Inhibitors ; Ranibizumab (ZL1R02VT79)
    Language English
    Publishing date 2022-09-06
    Publishing country Italy
    Document type Journal Article
    ZDB-ID 605550-3
    ISSN 2284-0729 ; 1128-3602 ; 0392-291X
    ISSN (online) 2284-0729
    ISSN 1128-3602 ; 0392-291X
    DOI 10.26355/eurrev_202208_29534
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  10. Article ; Online: Ultralow-Noise Chopper Amplifier for Seafloor E-Field Measurement.

    Song, Sixuan / Chen, Kai

    Sensors (Basel, Switzerland)

    2024  Volume 24, Issue 6

    Abstract: The seafloor E-field signal is extremely weak and difficult to measured, even with a high signal-to-noise ratio. The preamplifier for electrodes is a key technology for ocean-bottom electromagnetic receivers. In this study, a chopper amplifier was ... ...

    Abstract The seafloor E-field signal is extremely weak and difficult to measured, even with a high signal-to-noise ratio. The preamplifier for electrodes is a key technology for ocean-bottom electromagnetic receivers. In this study, a chopper amplifier was proposed and developed to measure the seafloor E-field signal in the nanovolt to millivolt range at significantly low frequencies. It included a modulator, transformer, AC amplifier, high-impedance (hi-Z) module, demodulator, low-pass filter, and chopper clock generator. The injected charge in complementary metal-oxide semiconductor (CMOS) switches that form the modulator is the main source of 1/
    Language English
    Publishing date 2024-03-17
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2052857-7
    ISSN 1424-8220 ; 1424-8220
    ISSN (online) 1424-8220
    ISSN 1424-8220
    DOI 10.3390/s24061920
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