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A ternary mechanism for the facilitated transfer of metal ions onto metal–organic frameworks: implications

《化学科学与工程前沿（英文）》页码 1632-1642 doi: 10.1007/s11705-022-2187-6

摘要： Although metal–organic frameworks offer a new platform for developing versatile sorption materials, yet coordinating the functionality, structure and component of these materials remains a great challenge. It depends on a comprehensive knowledge of a “real sorption mechanism”. Herein, a ternary mechanism for U(VI) uptake in metal–organic frameworks was reported. Analogous MIL-100s (Al, Fe, Cr) were prepared and studied for their ability to sequestrate U(VI) from aqueous solutions. As a result, MIL-100(Al) performed the best among the tested materials, and MIL-100(Cr) performed the worst. The nuclear magnetic resonance technique combined with energy-dispersive X-ray spectroscopy and zeta potential measurement reveal that U(VI) uptake in the three metal–organic frameworks involves different mechanisms. Specifically, hydrated uranyl ions form outer-sphere complexes in the surface of MIL-100s (Al, Fe) by exchanging with hydrogen ions of terminal hydroxyl groups (Al-OH₂, Fe-OH₂), and/or, hydrated uranyl ions are bound directly to Al(III) center in MIL-100(Al) through a strong inner-sphere coordination. For MIL-100(Cr), however, the U(VI) uptake is attributed to electrostatic attraction. Besides, the sorption mechanism is also pH and ionic strength dependent. The present study suggests that changing metal center of metal–organic frameworks and sorption conditions alters sorption mechanism, which helps to construct effective metal–organic frameworks-based sorbents for water purification.

关键词： U(VI) metal–organic frameworks adsorption mechanism metal node

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Clinical significance of para-aortic lymph node dissection and prognosis in ovarian cancer

null

《医学前沿（英文）》 2014年第8卷第1期页码 96-100 doi: 10.1007/s11684-014-0316-4

摘要：

Lymph node metastasis has an important effect on prognosis of patients with ovarian cancer. Moreover, the impact of para-aortic lymph node (PAN) removal on patient prognosis is still unclear. In this study, 80 patients were divided into groups A and B. Group A consisted of 30 patients who underwent PAN+ pelvic lymph node (PLN) dissection, whereas group B consisted of 50 patients who only underwent PLN dissection. Analysis of the correlation between PAN clearance and prognosis in epithelial ovarian cancer was conducted. Nineteen cases of lymph node metastasis were found in group A, among whom seven cases were positive for PAN, three cases for PLN, and nine cases for both PAN and PLN. In group B, 13 cases were positive for lymph node metastasis. Our study suggested that the metastatic rate of lymph node is 40.0%. Lymph node metastasis was significantly correlated with FIGO stage, tumor differentiation, and histological type both in groups A and B (P<0.05). In groups A and B, the three-year survival rates were 77.9% and 69.0%, and the five-year survival rates were 46.7% and 39.2%, respectively. However, the difference was not statistically significant (P>0.05). The three-year survival rates of PLN metastasis in groups A and B were 68.5% and 41.4%, and the five-year survival rates were 49.7% and 26.4%, respectively. Furthermore, PLN-positive patients who cleared PAN had significantly higher survival rate (P=0.044). In group A, the three-year survival rates of positive and negative lymph nodes were 43.5% and 72.7%, and the five-year survival rates were 27.2% and 58.5%, respectively. The difference was statistically significant (P=0.048). Cox model analysis of single factor suggested that lymph node status affected the survival rate (P<0.01), which was the death risk factor. Consequently, in ovarian carcinoma cytoreductive surgery, resection of the para-aortic lymph node, which has an important function in clinical treatment and prognosis of patients with ovarian cancer, is necessary.

关键词： ovarian cancer para-aortic lymph node pelvic lymph node

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Spatial embedded reinforcement of 20-node block element for analysis PC bridges

LONG Peiheng, DU Xianting, CHEN Weizhen

《结构与土木工程前沿（英文）》 2008年第2卷第3期页码 274-280 doi: 10.1007/s11709-008-0039-1

摘要： The formula for the contribution of prestressed reinforcement on embedded reinforcement element is derived according to the mechanical behavior of PC bridges and the foundational principle of finite element method. Mechanical concept is definite and examples validate the calculation results. Reinforcement element model allows generating a finite element mesh without taking into consideration the layout of reinforcements. Furthermore, the prestressing tendon may pass through the concrete elements in an arbitrary manner. It is an effective approach that the no-node loads are diverted from the tendons to the adjacent concrete elements. A useful arithmetic analysis of the spatial curved tendon PC Bridges is provided.

关键词： arithmetic analysis calculation prestressed reinforcement mechanical arbitrary

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Prognostic value of the 21-gene recurrence score in ER-positive, HER2-negative, node-positive breastcancer was similar in node-negative diseases: a single-center study of 800 patients

Jiayi Wu, Weiqi Gao, Xiaosong Chen, Chunxiao Fei, Lin Lin, Weiguo Chen, Ou Huang, Siji Zhu, Jianrong He, Yafen Li, Li Zhu, Kunwei Shen

《医学前沿（英文）》 2021年第15卷第4期页码 621-628 doi: 10.1007/s11684-020-0738-0

摘要： Multi-gene assays have emerged as crucial tools for risk stratification in early-stage breast cancer. This study aimed to evaluate the prognostic significance of the 21-gene recurrence score (RS) in Chinese patients with pN0-1, estrogen receptor-positive (ER ), human epidermal growth factor receptor 2-negative (HER2 ) breast cancer. Among 800 patients recruited between 2009 and 2016, the median RS was 24 (0–69), with 27.4%, 46.8%, and 25.9% patients classified into low-, intermediate-, and high-risk groups. Cox regression analysis demonstrated that the high-risk category was associated with significantly higher odds of invasive disease-free survival (IDFS) and distant disease-free survival (DDFS) events compared with the low-risk category (IDFS: HR= 2.450, 95% CI 1.017–5.902, = 0.046; DDFS: HR= 2.829, 95% CI 1.013–7.901, = 0.047). No significant association between RS category and overall survival (OS) was found (intermediate vs. low: HR= 1.244, 95% CI 0.292–5.297, = 0.768; high vs. low: HR= 2.933, 95% CI 0.759–11.327, = 0.119). RS, as a continuous variable, was a highly significant predictor for IDFS (HR= 1.028, 95% CI 1.010–1.047, = 0.002), DDFS (HR= 1.030, 95% CI 1.010–1.051, = 0.003), and OS (HR= 1.034, 95% CI 1.007–1.063, = 0.014). Our findings suggested that RS may predict IDFS in Chinese patients with ER /HER2 breast cancer with N0 or N1 disease.

关键词： early breast cancer 21-gene assay recurrence score prognosis

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基于虚拟节点道路网络模型的设计及实现

朱庄生,王庆,万德钧

《中国工程科学》 2009年第11卷第8期页码 83-87

摘要：

利用传统的基于节点连接的道路网络模型来表达真实世界中的道路网络，其存在的缺陷越来越突出，大大降低了导航系统的鲁棒性。为了消除这些缺陷，首次提出一个新的道路网络模型，即基于虚拟节点连接的道路网络模型，其虚拟节点是汇交路段的各个端点所围成的区域，具有真实道路路口的形状，与传统模型相比，该模型更能表达真实世界道路网络中的交通流，所以它能更好地满足地图匹配理论要求。另外，该模型能很好的表达真实道路路口参数，所以它在交通规划，交通管理和交通流模拟中都有着十分广阔的应用前景。

关键词：交通工程虚拟节点道路网络模型地图匹配交通规划

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信息中心物联网节点状态监测技术研究

崔立群,伍军

《中国工程科学》 2020年第22卷第6期页码 121-127 doi: 10.15302/J-SSCAE-2020.06.016

摘要：

为了管理信息中心物联网（IC-IoT）不断变化的网络状态信息，本文针对信息中心物联网提出一种节点状态监测方案，以更好适应未来网络的发展。首先提出一种新的管理信息库结构用于记录各种网络节点状态信息，采用信息中心网络（ICN）的命名格式，以网络节点状态内容本身为中心。在此架构上采用跟踪路由方法，结合基于数据块重要性的自适应数据放置策略来获得所需的网络状态信息，提高网络节点状态信息检索效率，同时设计了安全防护机制来达到保证数据机密性与对管理用户进行访问控制的目的。搭建网络仿真测试环境评估了上述跟踪路由机制、自适应数据放置策略、访问控制安全防护带来的时延影响，仿真结果表明此方案能够有效地提高数据获取效率，访问控制模型提供了数据机密性和其他安全性功能，仅附加了少量的计算成本。

关键词：信息中心网络，物联网，节点监测，访问控制

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Application progress of lymphography in oncology

Yang YU, Jibin LIU, Lixue YIN

《医学前沿（英文）》 2009年第3卷第1期页码 13-19 doi: 10.1007/s11684-009-0016-7

摘要： Lymphography is often used for the diagnosis of lymphatic metastasis in oncology. Determination of lymphatic metastasis is extremely important for accurate cancer staging, which may directly guide the clinical therapeutic scheme. In recent years, the technology of lymphography has developed rapidly on the basis of traditional lymphography, with the appearance of computed tomography (CT) lymphography, nuclear magnetic resonance (MR) lymphography, contrast-enhanced lymphosonography, and so on; the diagnostic accuracy has also been improved. The imaging principles and methods of these various technologies of lymphography are reviewed in this paper, and their applications and significance in oncology are also discussed in detail.

关键词： lymphography lymphatic metastasis sentinel lymph node biopsy

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Simulation of cohesive crack growth by a variable-node XFEM

Weihua FANG, Jiangfei WU, Tiantang YU, Thanh-Tung NGUYEN, Tinh Quoc BUI

《结构与土木工程前沿（英文）》 2020年第14卷第1期页码 215-228 doi: 10.1007/s11709-019-0595-6

摘要： A new computational approach that combines the extended finite element method associated with variable-node elements and cohesive zone model is developed. By using a new enriched technique based on sign function, the proposed model using 4-node quadrilateral elements can eliminate the blending element problem. It also allows modeling the equal stresses at both sides of the crack in the crack-tip as assumed in the cohesive model, and is able to simulate the arbitrary crack-tip location. The multiscale mesh technique associated with variable-node elements and the arc-length method further improve the efficiency of the developed approach. The performance and accuracy of the present approach are illustrated through numerical experiments considering both mode-I and mixed-mode fracture in concrete.

关键词： extended finite element method cohesive zone model sign function crack propagation

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为自供能传感器节点供电的最大功率点跟踪控制热能收集电路 None

Eun-Jung YOON, Jong-Tae PARK, Chong-Gun YU

《信息与电子工程前沿（英文）》 2018年第19卷第2期页码 285-296 doi: 10.1631/FITEE.1601181

摘要：提出一种简便的具有最大功率点跟踪（maximum power point tracking，MPPT）控制功能的热能收集电路，为自供能微型传感器节点供电。由于热电发生器（thermoelectric generator，TEG）的输出电压足够高，可直接驱动负载应用，故该电路免去了复杂的启动电路和直流-直流（DC-DC）升压转换器。为克服TEG设备和负载应用之间的功率失配，该电路在激活/休眠模式下工作。该热能收集电路基于0.35 μm互补式金属氧化物半导体（CMOS）工艺研制。实验结果证明该电路能正常工作，展示了MPPT方案性能。该电路实现了95.5％的峰值功效和高于99％的MPPT精度。

关键词：热电能；能量收集；最大功率点跟踪（MPPT）控制；自供电系统；传感器节点

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Optimal portfolio design of energy storage devices with financial and physical right market

《能源前沿（英文）》 2022年第16卷第1期页码 95-104 doi: 10.1007/s11708-021-0788-2

摘要： With the continuous development of the spot market, in the multi-stage power market environment with the day-ahead market and right market, the study associated with the portfolio of energy storage devices requires that attention should be paid to transmission congestion and power congestion. To maximize the profit of energy storage and avoid the imbalance of power supply and consumption and the risk of node price fluctuation caused by transmission congestion, this paper presents a portfolio strategy of energy storage devices with financial/physical contracts. First, the concepts of financial/physical transmission rights and financial/physical storage rights are proposed. Then, the portfolio models of financial contract and physical contract are established with the conditional value-at-risk to measure the risks. Finally, the portfolio models are verified through the test data of the Pennsylvania-New Jersey-Maryland (PJM) electric power spot market, and the comparison between the risk aversion of portfolios based on financial/physical contract with the portfolio of the market without rights. The simulation results show that the portfolio models proposed in this paper can effectively avoid the risk of market price fluctuations.

关键词： portfolio node price fluctuation transmission right energy storage right risk aversion

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Sustainability of metal recovery from E-waste

Biswajit Debnath, Ranjana Chowdhury, Sadhan Kumar Ghosh

《环境科学与工程前沿（英文）》 2018年第12卷第6期 doi: 10.1007/s11783-018-1044-9

摘要：

Metal recovery techniques from electronic waste reported in literature.

Metal recovery processes followed in Industries from electronic waste.

Sustainability analysis of metal recovery processes from electronic waste.

关键词： E-waste Metal recovery Metal Recovery from E-waste (MREW) Sustainability

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基于可观测节点信息的控制器局域网节点可靠性评估 Article

Lei-ming ZHANG, Long-hao TANG, Yong LEI

《信息与电子工程前沿（英文）》 2017年第18卷第5期页码 615-626 doi: 10.1631/FITEE.1601029

摘要：基于控制器局域网的总线技术广泛应用于网络化制造系统。网络作为系统的信息通道，其可靠性对系统的吞吐量、产品质量以及工作人员的安全至关重要。然而，由于节点内部状态的不可访问性，因此使用节点内置的错误计数器值直接评估控制器局域网节点的可靠性是难以进行的。本文提出一种新颖的控制器局域网节点可靠性评估方法，该方法使用节点脱离总线时间作为可靠性测度。基于网络错误日志和错误计数器值可访问的可观测节点信息，该方法可以估计网络中节点的发送错误计数器值。首先，本文基于分段马尔科夫链建立了估计节点发送错误计数器值的模型，该模型考虑了网络中错误分布的稀疏特性。其次，通过学习可观测节点的模型估计值和实际测量值之间的偏差，建立了贝叶斯网络以表述可观测节点的模型估计值更新机制。然后，将该更新机制应用到网络中发送错误计数器值不可访问的节点，完成其模型估计值的更新。最后，建立了节点可靠性评估方法以预测节点的脱离总线时间。为表明文中方法的有效性，进行了多组实验。实验结果表明由文中方法得到的估计值与实际观测值相一致。

关键词：控制器局域网；发送错误计数器；发送错误计数器值估计；贝叶斯网络；脱离总线时间

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Optimizing iodine capture performance by metal–organic framework containing with bipyridine units

《化学科学与工程前沿（英文）》 2023年第17卷第4期页码 395-403 doi: 10.1007/s11705-022-2218-3

摘要： Radioactive iodine exhibits medical values in radiology, but its excessive emissions can cause environmental pollution. Thus, the capture of radioiodine poses significant engineering for the environment and medical radiology. The adsorptive capture of radioactive iodine by metal–organic frameworks (MOFs) has risen to prominence. In this work, a Th-based MOF (denoted as Th-BPYDC) was structurally designed and synthesized, consisting of [Th₆(μ₃-O)₄(μ₃-OH)₄(H₂O)₆]¹²⁺ clusters, abundant bipyridine units, and large cavities that allowed guest molecules diffusion and transmission. Th-BPYDC exhibited the uptake capacities of 2.23 g·g⁻¹ and 312.18 mg·g⁻¹ towards I₂ vapor and I₂ dissolved in cyclohexane, respectively, surpassing its corresponding analogue Th-UiO-67. The bipyridine units boosted the adsorption performance, and Th-BPYDC showed good reusability with high stability. Our work thus opened a new way for the synthesis of MOFs to capture radioactive iodine.

关键词： metal–organic framework iodine adsorption nuclear waste environmental remediation

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Selective capture and separation of xenon and krypton using metal organic frameworks: a review

《化学科学与工程前沿（英文）》 2023年第17卷第12期页码 1895-1912 doi: 10.1007/s11705-023-2355-3

摘要： Xenon and krypton are widespread useful noble gases in commercial lighting, lasers, electronics, and medical industry. At the same time, radioactive noble gases may proliferate from used nuclear fuel and diffuse in open atmospheres. Metal organic frameworks as hotspot porous materials for gases uptake and separation are considered to be potential solutions. In this review, we comprehensively summarized recent researches on metal organic frameworks for selective capture and separation of xenon and krypton. Particularly, we followed the aspects of different optimal design strategies, including optimal pore/cage size and geometry, open metal sites, ions (anions and cations), and polar functional groups for enhancing the xenon adsorption and separation performances. Meanwhile, a comparison of each strategy and the mechanisms of xenon/krypton separation were pointed out. The separation of krypton from gases mixtures by dual-bed systems was further discussed. Finally, some existing challenges and opportunities for possible real applications were proclaimed.

关键词： metal organic frameworks xenon krypton selective separation used nuclear fuel

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Liquid metal thermal hydraulics R&D at European scale: achievements and prospects

《能源前沿（英文）》 2021年第15卷第4期页码 842-853 doi: 10.1007/s11708-021-0743-2

摘要： A significant role for a future nuclear carbon-free energy production is attributed to fast reactors, mostly employing a liquid metal as a coolant. This paper summarizes the efforts that have been undertaken in collaborative projects sponsored by the European Commission in the past 20 years in the fields of liquid-metal heat transfer modeling, fuel assembly and core thermal hydraulics, pool and system thermal hydraulics, and establishment of best practice guidelines and verification, validation, and uncertainty quantification (UQ). The achievements in these fields will be presented along with the prospects on topics which will be studied collaboratively in Europe in the years to come. These prospects include further development of heat transfer models for applied computational fluid dynamics (CFD), further analysis of the consequences of fuel assembly blockages on coolant flow and temperature, analysis of the thermal hydraulic effects in deformed fuel assemblies, extended validation of three-dimensional pool thermal hydraulic CFD models, and further development and validation of multi-scale system thermal hydraulic methods.

关键词： liquid metal thermal hydraulics Europe

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标题作者时间类型操作

A ternary mechanism for the facilitated transfer of metal ions onto metal–organic frameworks: implications

期刊论文

Clinical significance of para-aortic lymph node dissection and prognosis in ovarian cancer

null

期刊论文

Spatial embedded reinforcement of 20-node block element for analysis PC bridges

LONG Peiheng, DU Xianting, CHEN Weizhen

期刊论文

Prognostic value of the 21-gene recurrence score in ER-positive, HER2-negative, node-positive breastcancer was similar in node-negative diseases: a single-center study of 800 patients

Jiayi Wu, Weiqi Gao, Xiaosong Chen, Chunxiao Fei, Lin Lin, Weiguo Chen, Ou Huang, Siji Zhu, Jianrong He, Yafen Li, Li Zhu, Kunwei Shen

期刊论文

基于虚拟节点道路网络模型的设计及实现

朱庄生,王庆,万德钧

期刊论文

信息中心物联网节点状态监测技术研究

崔立群,伍军

期刊论文

Application progress of lymphography in oncology

Yang YU, Jibin LIU, Lixue YIN

期刊论文

Simulation of cohesive crack growth by a variable-node XFEM