mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
A Deep Adaptive Learning Method for Rolling Bearing Fault Diagnosis Using Immunity

The extraction of rolling bearing fault features using traditional diagnostic methods is not sufficiently comprehensive and the features are often chosen subjectively and depend on human experience. In this paper, an improved deep convolutional process is used to extract a set of features adaptively. The hidden multi-layer feature of deep convolutional neural networks is also exploited to improve the extraction features. A deterministic detection of low-confidence samples is performed to ensure the reliability of the recognition results and to decrease the rate of false positives by evaluating the diagnosis of the deep convolutional neural network. To improve the efficiency of the continuous learning elements of the rolling bearing fault diagnosis, a clone learning strategy based on cloning and mutation operations is proposed. The experimental results show that the proposed deep convolutional neural network model can extract multiple rolling bearing fault features, improve classification and detection accuracy by reducing the false positive rate when diagnosing rolling bearing faults, and accelerate learning efficiency when using low-confidence rolling bearing fault samples.
Deep Learning Based 2D Human Pose Estimation: A Survey

Human pose estimation has received significant attention recently due to its various applications in the real world. As the performance of the state-of-the-art human pose estimation methods can be improved by deep learning, this paper presents a comprehensive survey of deep learning based human pose estimation methods and analyzes the methodologies employed. We summarize and discuss recent works with a methodologybased taxonomy. Single-person and multi-person pipelines are first reviewed separately. Then, the deep learning techniques applied in these pipelines are compared and analyzed. The datasets and metrics used in this task are also discussed and compared. The aim of this survey is to make every step in the estimation pipelines interpretable and to provide readers a readily comprehensible explanation. Moreover, the unsolved problems and challenges for future research are discussed.
Task-Aware Flow Scheduling with Heterogeneous Utility Characteristics for Data Center Networks

With the continuous enrichment of cloud services, an increasing number of applications are being deployed in data centers. These emerging applications are often communication-intensive and data-parallel, and their performance is closely related to the underlying network. With their distributed nature, the applications consist of tasks that involve a collection of parallel flows. Traditional techniques to optimize flow-level metrics are agnostic to task-level requirements, leading to poor application-level performance. In this paper, we address the heterogeneous task-level requirements of applications and propose task-aware flow scheduling. First, we model tasks' sensitivity to their completion time by utilities. Second, on the basis of Nash bargaining theory, we establish a flow scheduling model with heterogeneous utility characteristics, and analyze it using Lagrange multiplier method and KKT condition. Third, we propose two utility-aware bandwidth allocation algorithms with different practical constraints. Finally, we present Tasch, a system that enables tasks to maintain high utilities and guarantees the fairness of utilities. To demonstrate the feasibility of our system, we conduct comprehensive evaluations with realworld traffic trace. Communication stages complete up to 1.4× faster on average, task utilities increase up to 2.26×, and the fairness of tasks improves up to 8.66× using Tasch in comparison to per-flow mechanisms.
A New Filter Collaborative State Transition Algorithm for Two-Objective Dynamic Reactive Power Optimization

Dynamic Reactive Power Optimization (DRPO) is a large-scale, multi-period, and strongly coupled nonlinear mixed-integer programming problem that is difficult to solve directly. First, to handle discrete variables and switching operation constraints, DRPO is formulated as a nonlinear constrained two-objective optimization problem in this paper. The first objective is to minimize the real power loss and the Total Voltage Deviations (TVDs), and the second objective is to minimize incremental system loss. Then a Filter Collaborative State Transition Algorithm (FCSTA) is presented for solving DRPO problems. Two populations corresponding to two different objectives are employed. Moreover, the filter technique is utilized to deal with constraints. Finally, the effectiveness of the proposed method is demonstrated through the results obtained for a 24-hour test on Ward & Hale 6 bus, IEEE 14 bus, and IEEE 30 bus test power systems. To substantiate the effectiveness of the proposed algorithms, the obtained results are compared with different approaches in the literature.
腹腔高压与腹腔间隔室综合征治疗策略

早在1863年,人们已经开始认识并报道了腹腔压力升高对机体的损害.1984年,Kron等首先报道了腹腔间隔室综合征(abdominal compartment syndrome,ACS)及腹腔压力的测量方法,人们对腹腔高压和ACS的认识逐步深入,2004年,成立了世界腹腔间隔室综合征联合会(World Society of the Abdominal Compartment Syndrome,WSACS),尝试对这种疾病进行标准化的定义,2018年更名为Abdominal Compartment Society(http://www.wsacs.org).随着人们对重症医学的认识的深入和限制性液体复苏的广泛开展,腹腔高压及ACS的发生率可能会逐步下降,但其定义及其病理生理改变仍值得人们广泛研究.
CFD analysis of performance improvement of the Savonius water turbine by using an impinging jet duct design

The majority of research on water turbines focuses on design improvement of large-scale hydrokinetic turbines for power generation, whichmay have delayed the utilization of kinetic energy contained in rivers and canals. The aim of this paper is to improve the efficiency of a two bladed Savonius type cross-flow hydrokinetic turbine, which can be used as an energy converter to harness free-stream kinetic energy of water. An impinging jet duct design is presented for improving performance of the Savonius turbine in wind application as seen from literature. The performance of the modified turbine is evaluated using CFD software Fluent, and is compared with that of a simple two bladed Savonius water turbine and some of the prominent literature designs of the Savonius turbine. It is shown that the present design exhibits improved performance compared to the selected designs of the Savonius turbine. Further an insight of the improved performance of the modified turbine is also obtained from flow physics study.
妊娠滋养细胞疾病的诊治专题讨论-妊娠滋养细胞疾病的分类及遗传学和分子病理诊断

妊娠滋养细胞疾病(gestational trophoblastic disease, GTD)是来自滋养细胞的一组病变,与妊娠有关。不同的妊娠性质含有不同的父源性遗传物质,建立在遗传学、免疫组织化学、DNA序列分析等基础上的分子病理诊断,采取表型和基因型分析相结合的分类原则,可更好地指导预后判断和临床处理。
Influence of the Addition of Cotton Stalk during Co-pyrolysis with Sewage Sludge on the Properties, Surface Characteristics, and Ecological Risks of Biochars

Sewage sludge produced by municipal sewage treatment plants can potentially be used as a biomass energy source because of its high organic content. Presently, the conversion and utilization of rapidly growing amounts of sewage sludge represent an urgent challenge in China. Thermal conversion of sewage sludge to biochar through pyrolysis is a promising solution to this problem. However, biochar produced by pyrolysis of sewage sludge alone has a poor pore structure as a result of its low C content and high ash content. Furthermore, it is enriched in heavy metals that may pose high ecological risks. In this study, we addressed these issues through co-pyrolysis of sewage sludge and cotton stalks(1:1, wt./wt.) at different pyrolysis temperatures ranging from 350℃ to 750℃. The properties and surface characteristics of the biochars were investigated. Meanwhile, the transformation behavior of heavy metals during the co-pyrolysis process was studied, and the potential ecological risks of heavy metals in biochars were assessed. The results showed that elevated pyrolysis temperatures reduced the biochar yield and C content of the biochars, whereas such temperatures increased the pH value and ash content of the biochars. The biochars prepared at different pyrolysis temperatures were all mesoporous materials. The elevated temperatures promoted the transformation of heavy metals from mobile fractions to stable ones, thus resulting in a significant decrease in the ecological risks. In summary, co-pyrolysis of sewage sludge with cotton stalks proved to be a feasible method for the conversion and utilization of sewage sludge.
Performance Analysis of a Multistage Centrifugal Pump Used in an Organic Rankine Cycle (ORC) System under Various Condensation Conditions

In an organic Rankine cycle(ORC) system, the working fluid pump plays an important role in the system performance. This paper focused on the operating characteristics of a multistage centrifugal pump at various speeds and condensation conditions. The experimental investigation was carried out to assess the influence of the performance of the pump by the ORC system with special attention to actual net power output, thermal efficiency as well as back work ratio(BWR). The results showed that an increase in the pump speed led to an increase in the mass flow rate and expand in the operating range of the outlet pressure. The mass flow rate decreased nonlinearly with the increase of the outlet pressure from 0.22 to 2.41 MPa; the electric power consumption changed between 151.54 and 2409.34 W and the mechanical efficiency of the pump changed from 7.90% to 61.88% when the pump speed varied from 1160 to 2900 r/min. Furthermore, at lower pump specific speed the ORC system achieved higher thermal efficiency, which suggested that an ultra-low specific speed pump was a promising candidate for an ORC system. The results also suggested that the effects of condensation conditions on the pump performance decreased with the pump speed increasing and BWR was relatively sensitive to the condensation conditions, especially at low pump speed.
Historic Districts in the Wake of Modern Adversities: Reflections from China and Norway

A shift to a market-led economy initialized due to globalization has caused massive restructuring-both economically and spatially. In the midst of such restructuring processes for place promotion and investment marketing, falls culture and heritage. The developed world identified the value of heritage and centered the restructuring around the global-local nexus, whereas the developing world, increasingly influenced by the far west, made progress towards “Americanization.” However different the approaches might be, a similarity in the situation of perception of culture can be found today-induced by the technical and global forces. A new debate emerged in the professional communities on preserving the essence of historic districts/neighborhoods based on the ideologies and perceptions of governments and communities alike. This paper aims to decipher the influence of the changing notion of “development” and the globalization on the historic districts in the developing and developed worlds, by detailing the case of the Drum Tower Muslim District in Xi'an and a mining town named Roros (a world heritage site) in Norway. The study is primarily based on secondary sources, discussions with experts, field visits, and in depth interviews with local people. The findings from both the cases prove that there is no clear distinction in the current scenario of historic district preservation, although the governing processes and planning mechanisms of both countries have stark differences.
Numerical simulation of hydrodynamic environment effects of the reclamation project of Nanhui tidal flat in Yangtze Estuary

The reclamation is the main method in the coast exploitation, and the assessment of the hydrodynamic environment effect of the reclamation project is important for project’s site selection and environmental protection. With consideration of the baroclinic water, a 3-D numerical model MIKE3 is applied to simulate Yangtze Estuary’s hydrodynamic environment to predict the impacts of the reclamation project of the Nanhui tidal flat. The simulated results of the model agree well with the field data of the tide level, the current speed, the current direction, the temperature, the salinity and the water quality, and it is indicated that after the reclamation project, the high tide level will be lower, while the low tide level will be higher in the South Branch in general. During the spring tide in the dry season, the peak velocity during the ebb tide in the North Channel will be reduced by 13%, while it will be increased by 21% in the South Channel in average. The salinity will be increased in the North Channel, while reduced in the South Passage, besides, the reclamation project will aggravate the saltwater intrusion of the North Branch. The value of N/P will be increased by about 4% in the whole South Branch except for the North Channel, leading to a slight aggravation of the phosphorus restriction effect in the Yangtze Estuary.
Numerical study of a guide-vane-augmented vertical darrieus tidal-currentturbine

It is reported that the augmented vertical axis turbine (VAT) has a better operating performance. A guide-vane type augmentation is proposed in this study, with a simpler outline and a better adaptability to various directions of the incident water flow, as compared to the duct-type diffuser. A 2-D numerical model based on the computational fluid dynamics software ANSYS-Fluent is established and validated by experimental data. It is found that the guide vanes could narrow the flow path together with the VAT rotor and increase the flow velocity around the blades. The fluctuation of the instantaneous torque output is significantly reduced by using the guide-vane stator. The numerical results indicate that a four blades setup is suitable for the stator and the chord length of the guide vane should be equal to that of the rotor blade. The gap between the stator and the rotor is suggested to be a quarter of the chord length of the rotor blades. The non-zero pitch angle of the guide vane is found to have negative effects on the torque and the power output. The averaged power and torque coefficients for three non-zero directional angles of the incident flow are approximately 30% lower than those for the zero-directional angle.
Permian-Triassic Climatic and Environmental Extremes and Biotic Response (IGCP 630: 2014-2018): Goals and Achievements

IGCP 630, with its full title of “Permian-Triassic (P-Tr) climatic and environmental extremes and biotic response”, is an International Geoscience Program project sponsored by the United Nation Educational, Scientific & Cultural Organization (UNESCO) and International Union of Geological Sciences (IUGS). This project was approved in 2014 and ended in 2018, and has applied for one-year extension in 2019. IGCP 630 consists of 150 geoscientists across multidisciplinary geosciences from 27 countries around the world. Its co-leader team is chaired by Prof. Chen Zhongqiang from China University of Geosciences (Wuhan), China and also includes other 13 world-leading geoscientists in the studies on the global P-Tr events: Thomas J. Algeo (USA), Margret L. Fraiser (USA), Steve Kershaw (UK), Jinnan Tong (China), Sylvie Crasquin (France), Michael J. Benton (UK), Guang R. Shi (Australia), Charles M. Henderson (Canada), Arnie Winguth (USA), Paul B. Wignall (UK), Kunio Kaiho (Japan), Ghulam Bhat (India), and Yuri D. Zakharov (Russia). Its logo is as below (Fig. 1). On its web-page [http://igcp630.cug.edu.cn] you can find general information about the project aims, co-leaders, project members, recent announcements, and photos from conferences and field excursions.
Role of the proportion of dominant follicles in patients with polycystic ovary syndrome undergoing in vitro fertilization-embryo transfer

Background: There is no absolute consensus for the best time for triggering. The aim of this study was to investigate the effect of different proportion of dominant follicles (PDF) on the human chorionic gonadotropin (HCG) day for the clinical outcomes in patients with polycystic ovary syndrome (PCOS) of different ovarian stimulation protocols. Methods: A total of 371 cycles of the gonadotropin-releasing hormone (GnRH) agonist long protocol and 347 cycles of GnRH antagonist protocol from January 2014 to December 2016 were included in this retrospective study. Based on the PDF on the day of the HCG administration, the included patients were divided into three groups: Group A (low PDF), PDF <20%; Group B (medium PDF), 20%≤ PDF ≤40%; Group C (high PDF), PDF >40%. The measurements regarding ovarian stimulation characteristics, fertilization rate, top quality embryo rate, clinical pregnancy rate, and ovarian hyperstimualtion syndrome (OHSS) rate were compared in different PDF groups with different protocols. Results: In both the GnRH antagonist protocol and GnRH agonist long protocol, the characteristics such as mean age, anti- Mullerian hormone, antral follicle count (AFC), and body mass index were comparable between groups. The number of oocytes retrieved decreased statistically significantly as the PDF and rate of matured oocytes increased. In the GnRH agonist long protocol, the rate of normally fertilized oocytes was highest in Group A (59.74 ± 31.21 vs. 49.70 ± 37.95, 49.67 ± 36.62; F = 3.743, P = 0.025). There were no significant differences in the rate of top-quality embryos and the clinical pregnancy rate between the groups. The clinical pregnancy rate was similar in the three groups (63.6%, 62.5%, 67.5%, respectively, x~2 = 0.989, P = 0.911). The moderate and severe OHSS rate increased statistically significantly when the PDF increased, which was highest in group C (1.4%, 3.1%, 6.7%, respectively, x~2 = 12.014, P = 0.017). In the GnRH antagonist protocol, there were no significant differences in the rate of top-quality embryos, the rate of normally fertilized oocytes, the clinical pregnancy rate, and the moderate and severe OHSS rate between the groups. The clinical pregnancy rate in Group C was higher than that in Group A (57.9 %vs. 46.6%, x~2 = 10.850, P = 0.093). Conclusions: In the GnRH antagonist protocol, PDF on the HCG day of less than 20 %may be unfavorable to the clinical pregnancy rate in PCOS. In the GnRH agonist long protocol, delaying the HCG trigger timing has no good effect on clinical pregnancy and the risk of OHSS might increase in patients with PCOS.
(Bi_4I_(16))~(4-)Iodobismuthate Tetramer Directed by Viologen-like Template: Enhanced Absorption Behavior, Optical Gap and Photocurrent Response Property Induced by I···I Interactions

Based on the template of protonated BPDO (B PDO = 4,4'-bipyridine N,N-dioxide), a new iodobismuthate hybrid with formula of (H_2DPDO)_2(Bi_4I_(16)) (1) was synthesized under solvothermal conditions. The Bi_4I_(16)~(4-)tetramer is built from four edge-sharing BiI6 octahedra. I···I interactions stabilize the structure and contribute to the structural extending from 0-D cluster to 1-D chain. The broader absorption band and lower energy gap of 1.76 eV are led by strong I···I interactions, so the small and rigid template can result in strong halogen···halogen interaction, which will be beneficial for its charge transfer. The photocurrent response property of this complex was discussed, and its mechanism has also been proposed.
Nonvolatile waveguide transmission tuning with electrically-driven ultra-small GST phase-change material

Low-power reconfigurable optical circuits are highly demanded to satisfy a variety of different applications. Conventional electro-optic and thermo-optic refractive index tuning methods in silicon photonics are not suitable for reconfiguration of optical circuits due to their high static power consumption and volatility. We propose and demonstrate a nonvolatile tuning method by utilizing the reversible phase change property of GST integrated on top of the silicon waveguide. The phase change is enabled by applying electrical pulses to the lm-sized GST active region in a sandwich structure. The experimental results show that the optical transmission of the silicon waveguide can be tuned by controlling the phase state of GST.
40-Year (1978–2017) human settlement changes in China reflected by impervious surfaces from satellite remote sensing

Impervious surfaces are the most significant feature of human settlements. Timely, accurate, and frequent information on impervious surfaces is critical in both social-economic and natural environment applications. Over the past 40 years, impervious surface areas in China have grown rapidly. However, annual maps of impervious areas in China with high spatial details do not exist during this period. In this paper, we made use of reliable impervious surface mapping algorithms that we published before and the Google Earth Engine(GEE) platform to address this data gap. With available data in GEE, we were able to map impervious surfaces over the entire country circa 1978, and during 1985–2017 at an annual frequency. The 1978 data were at 60-m resolution, while the 1985–2017 data were in 30-m resolution. For the 30-m resolution data, we evaluated the accuracies for 1985, 1990, 1995, 2000, 2005, 2010, and 2015. Overall accuracies reached more than 90%. Our results indicate that the growth of impervious surface in China was not only fast but also considerably exceeding the per capita impervious surface area in developed countries like Japan. The 40-year continuous and consistent impervious surface distribution data in China would generate widespread interests in the research and policy-making community. The impervious surface data can be freely downloaded from http://data.ess.tsinghua.edu.cn.
Atomic pair distribution function research on Li_2MnO_3 electrode structure evolution

The mechanism research of structure-related reactions on Li_2MnO_3 is important to enhance the electrochemical performance of lithium-manganese-rich layered oxides. Although there are some reports on the structure evolution of Li_2MnO_3 during cycling process, the employed research techniques are very limited, mainly in/ex-situ X-ray diffraction, X-ray absorption and transmission electron microscopy. Here, atomic pair distribution function, a method to study the local atomic arrangement on the basis of average spectroscopic information, is used for the first time to study the local structure evolution of Li_2MnO_3 during electrochemical charge/discharge cycles. The results clearly demonstrate that Mn~(3+)/Mn~(4+) redox couple is activated and Mn ions are reduced during discharging process. Some Mn ions in Mn layers can significantly migrate to Li layers and occupy the octahedral sites. As a result, a portion of inserted Li ions can occupy the face-shared tetrahedron sites, accompanied by the formation of local spinel-like structure. This work provides an important and suitable method based on the average spectroscopic information to investigate the local structure of electrode materials of lithium-ion batteries as well as other advanced battery systems.