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  • 1
    In: Scientific Reports, Springer Science and Business Media LLC, Vol. 7, No. 1 ( 2017-08-29)
    Abstract: To investigate the concentrations of rare earth elements in cereals and assess human health risk through cereal consumption, a total of 327 cereal samples were collected from rare earth mining area and control area in Shandong, China. The contents of 14 rare earth elements were determined by Inductively Coupled Plasma—Mass Spectrometry (ICP—MS). The medians of total rare earth elements in cereals from mining and control areas were 74.22 μg/kg and 47.83 μg/kg, respectively, and the difference was statistically significant ( P   〈  0.05). The wheat had the highest rare earth elements concentrations (109.39 μg/kg and 77.96 μg/kg for mining and control areas, respectively) and maize had the lowest rare earth elements concentrations (42.88 μg/kg and 30.25 μg/kg for mining and control areas, respectively). The rare earth elements distribution patterns for both areas were characterized by enrichment of light rare earth elements. The health risk assessment demonstrated that the estimated daily intakes of rare earth elements through cereal consumption were considerably lower than the acceptable daily intake (70 μg/kg bw). The damage to adults can be neglected, but more attention should be paid to the effects of continuous exposure to rare earth elements on children.
    Type of Medium: Online Resource
    ISSN: 2045-2322
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2017
    detail.hit.zdb_id: 2615211-3
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  • 2
    In: Progress in Organic Coatings, Elsevier BV, Vol. 187 ( 2024-02), p. 108115-
    Type of Medium: Online Resource
    ISSN: 0300-9440
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2024
    detail.hit.zdb_id: 2015714-9
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  • 3
    In: The Heart Surgery Forum, Forum Multimedia Publishing LLC, Vol. 22, No. 2 ( 2019-03-08), p. E112-E118
    Abstract: Background: Perimembranous ventricular septal defect (pmVSD) is a common congenital heart disease. Transaxillary occluder device closure of the pmVSD has been proved effective and an alternative to surgical closure. The study aimed to evaluate the immediate operation outcomes and the early and midterm follow-up outcomes of transaxillary occluder device closure. Methods: From January 2014 to December 2017, we retrospectively analyzed the patients who underwent transaxillary device closure of the pmVSD. All patients underwent transthoracic echocardiography (TTE), chest x-ray, and electrocardiogram (ECG) before and after the procedure (before discharging). Follow-up evaluation was completed at the time of 3, 6, 12 months and yearly thereafter in outpatient setting with TTE and ECG. Results: A total of 428 patients (216 male, 212 female) underwent transaxillary occluder device closure of the pmVSD under the guidance of transesophageal echocardiography (TEE). The mean age at the operation time was 2.2 ± 1.5 year (range 0.5-16.2 year). The mean weight was 8.5 ± 4.1 kg (range 6-61 kg). The mean size of the occluder implanted in the operation was 5.3 ± 1.4 (range 4-8 mm), matching the mean defect size of 4.2 ± 1.1 (range 3-6 mm). The device closure operation was successfully achieved in 422 pmVSD patients (98.6%), and 6 patients failed in occluding and were converted to open surgery because of a great residual shunt and obvious device-related aortic regurgitation . Immediate complete closure was detected by postoperative TEE in all, but 3 patients had trivial residual shunting. Total early adverse events emerged in 47 patients (11.1%). New mild tricuspid and aortic regurgitation occurred in 17 and 3 patients and disappeared in follow-up. Abnormal atrioventricular conduction events emerged in 23 patients, including left anterior block, complete right bundle branch block (CRBBB), incomplete right bundle branch block (IRBBB), administrated with close follow-up. Pericardial effusion occurred in 2 other patients, managed with puncture drainage. During a median follow-up period of 26.8 months (range 6-48 months), no serious adverse event and later-on complete atrioventricular block were encountered. Conclusion: In our experience, transaxillary device closure was performed via right infra-axillary mini-incision (invisible) guided by TEE, with low incidence of postoperative adverse events, confirming that transaxillary device closure of the pmVSD under the guidance of TEE is an effective alternative to surgical closure in well-selected pmVSD patients.
    Type of Medium: Online Resource
    ISSN: 1522-6662 , 1098-3511
    Language: Unknown
    Publisher: Forum Multimedia Publishing LLC
    Publication Date: 2019
    detail.hit.zdb_id: 2069230-4
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  • 4
    In: Energy Reports, Elsevier BV, Vol. 7 ( 2021-04), p. 175-182
    Type of Medium: Online Resource
    ISSN: 2352-4847
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2021
    detail.hit.zdb_id: 2814795-9
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  • 5
    Online Resource
    Online Resource
    The Electrochemical Society ; 2023
    In:  ECS Journal of Solid State Science and Technology Vol. 12, No. 4 ( 2023-04-01), p. 043014-
    In: ECS Journal of Solid State Science and Technology, The Electrochemical Society, Vol. 12, No. 4 ( 2023-04-01), p. 043014-
    Abstract: As a paradigm of engineering antiferroelectric(AFE)-ferroelectric(FE) transition on rare-Earth/titanium complex oxides by solid solution to develop advanced dielectric energy storage materials with high energy density and efficiency, the La 2-x Y x Ti 2 O 7 solid solution antiferroelectrics are theoretically investigated by first-principles calculations of structural stability, band-structure and dielectric polarization hysteresis and AFE-FE transition energy. Dielectric energy storage performances are evaluated and explained by energy density and efficiency as well as AFE or FE phase stability under the electric fields approaching the uppermost critical value determined by electronic band-gap, which highly hinges on field-applying crystallographic orientation and Y-element content. In merit of its multiferroic properties, La 2-x Y x Ti 2 O 7 crystals are demonstrated to acquire energy storage performances of 35 J·cm −3 energy density and 90% efficiency for the amenable maximum electric field of 4 MV·cm −1 . The present study is expected to motivate the prospective experimental studies of these potential AFE materials which have so far been rarely deliberated in energy storage applications.
    Type of Medium: Online Resource
    ISSN: 2162-8769 , 2162-8777
    Language: Unknown
    Publisher: The Electrochemical Society
    Publication Date: 2023
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  • 6
    In: E3S Web of Conferences, EDP Sciences, Vol. 352 ( 2022), p. 01085-
    Abstract: Accurately predicting the build-up rate of single-bending positive displacement motor (PDM) assembly in compound drilling is helpful to rational design the well trajectory, realize compound drilling in long well sections and improve the rate of penetration. Based on the calculation model of corrected build-up rate of single-bending PDM assembly in sliding drilling, the build-up rate calculation method of single-bending PDM assembly in compound drilling was established by combining the trajectory measurement data of the drilled sections, and the influence law of parameters such as bending angle, weight on bit, bit anisotropy index and formation inclination on the build-up rate of compound drilling was analyzed. And the following results are obtained. First, the build-up effect of the single-bending PDM assembly during compound drilling is mainly the result of the leverage effect and pendulum effect of the drill tool assembly, as well as the natural deviation of formation. Second, the composite drilling build-up rate is related to the drilling tool structure, bit performance, drilling parameters, formation inclination and other factors. In conclusion, the factors affecting the build-up rate of conventional drilling tool assembly also have impacts on the composite drilling build-up rate of single-bending PDM assembly. The method is important for the control of well trajectory during compound drilling.
    Type of Medium: Online Resource
    ISSN: 2267-1242
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2022
    detail.hit.zdb_id: 2755680-3
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  • 7
    In: Processes, MDPI AG, Vol. 11, No. 8 ( 2023-07-26), p. 2258-
    Abstract: The volatility and uncertainty introduced by increasingly integrated renewable energy pose challenges to the reliable and stable operation of the power system. To mitigate the operation risks, a two-stage optimal preventive control model that incorporates transient stability constraints and considers uncertainties from multiple resources is proposed. First, the uncertainties of different re-sources are modeled, with which the non-sequential Monte Carlo sampling method is used to correspondingly generate the scenarios. Thereafter, a two-stage control model that balances operational safety and economy and realizes preventive control and emergency control is built. The operation schedule from the preventive control stage aims to minimize the transient stability probability and operation costs. If any faults destabilize the system, the emergency control stage will be activated immediately to help the system recover stability with minimal control costs. To expedite the solving of the two-stage model, a multi-objective particle swarm algorithm based on entropy-TOPSIS is proposed. Finally, the effectiveness of the proposed model and solving algorithm are validated with the modified IEEE118 node system.
    Type of Medium: Online Resource
    ISSN: 2227-9717
    Language: English
    Publisher: MDPI AG
    Publication Date: 2023
    detail.hit.zdb_id: 2720994-5
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