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Radiomics model for distinguishing tuberculosis and lung cancer on computed tomography scans

World Journal of Clinical Cases 2020年第21期8卷 5203-5212页

作者： E-Nuo Cui Tao Yu sheng-jie shang Xiao-Yu Wang Yi-Lin Jin Yue Dong Hai Zhao Ya-Hong Luo Xi-Ran Jiang School of Computer Science and Engineering Northeastern UniversityShenyang 110619Liaoning ProvinceChina School of Computer Science and Engineering Shenyang UniversityShenyang 110044Liaoning ProvinceChina Medical Imaging Department Cancer Hospital of China Medical UniversityLiaoning Cancer Hospital and InstituteShenyang 110042Liaoning ProvinceChina Department of Biomedical Engineering China Medical UniversityShenyang 110122Liaoning ProvinceChina

BACKGROUND Pulmonary tuberculosis(TB)and lung cancer(LC)are common diseases with a high incidence and similar symptoms,which may be misdiagnosed by radiologists,thus delaying the best treatment opportunity for *** To develop and validate radiomics methods for distinguishing pulmonary TB from LC based on computed tomography(CT)*** We enrolled 478 patients(January 2012 to October 2018),who underwent preoperative CT *** features were extracted and selected from the CT data to establish a logistic regression model.A radiomics nomogram model was constructed,with the receiver operating characteristic,decision and calibration curves plotted to evaluate the discriminative *** Radiomics features extracted from lesions with 4 mm radial dilation distances outside the lesion showed the best discriminative *** radiomics nomogram model exhibited good discrimination,with an area under the curve of 0.914(sensitivity=0.890,specificity=0.796)in the training cohort,and 0.900(sensitivity=0.788,specificity=0.907)in the validation *** decision curve analysis revealed that the constructed nomogram had clinical *** These proposed radiomic methods can be used as a noninvasive tool for differentiation of TB and LC based on preoperative CT data.

关键词： Pulmonary tuberculosis Lung cancer Radiomics Computed tomography Computer–aided diagnosis Nomogram

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Global Probabilistic Voltage Sensitivity Analysis of Active Distribution Networks Based on the Compound Gaussian Mixture Model

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Dianwang Jishu/Power System Technology 2025年第1期49卷 295-305页

作者： Zhang, Ren Wang, Jian shang, jie Hai, Chen Liu, Haoming School of Electrical and Power Engineering Hohai University Jiangsu Province Nanjing 211100 China College of Artificial Intelligence and Automation Hohai University Jiangsu Province Nanjing 211100 China

The stochasticity of the high penetration of distributed generations (DGs) exacerbates the voltage fluctuation of the active distribution networks (ADNs) and complicates its voltage safety analysis. Therefore, this paper proposes a global probability voltage sensitivity analysis method based on the compound Gaussian mixture model (GMM). Firstly, a shared node path impedance-based global voltage sensitivity analytical model of ADN is derived to quantify the impact of global power fluctuations on node voltage. Considering that the voltage fluctuation has the non-Gaussian characteristic under the superposition influence of power uncertainty injected by multiple nodes, the GMM is used to characterize the probability characteristics of DG and load forecasting errors. Then, based on the affine transformation of the global sensitivity matrix to the GMM of DG and load forecasting error, the probability analytic expression of the voltage fluctuation is constructed, which is caused by the uncertainty of DG and load. Finally, based on the GMM characteristic function, the compound GMM characteristic function of the combined influence of the uncertainty of DG and load on voltage fluctuation is derived, and the global probabilistic voltage sensitivity analysis model based on the compound GMM is established. The case study results show that the proposed method can reflect the probability characteristics of the impact of all node power fluctuations on node voltage, and can quickly and accurately calculate the probability of over-voltage in ADNs. © 2025 Power System Technology Press. All rights reserved.

关键词： Affine transforms

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A comparison of deep learning methods for seismic impedance inversion

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Petroleum Science 2022年第3期19卷 1019-1030页

作者： Si-Bo Zhang Hong-jie Si Xin-Ming Wu shang-sheng Yan Huawei Cloud EI Product Department Xi'anShaanxi710077China School of Earth and Space Sciences University of Science and Technology of ChinaHefeiAnhui230026China

Deep learning is widely used for seismic impedance inversion,but few work provides in-depth research and analysis on designing the architectures of deep neural networks and choosing the network *** paper is dedicated to comprehensively studying on the significant aspects of deep neural networks that affect the inversion *** experimentally reveal how network hyperparameters and architectures affect the inversion performance,and develop a series of methods which are proven to be effective in reconstructing high-frequency information in the estimated impedance *** demonstrate that the proposed multi-scale architecture is helpful to reconstruct more high-frequency details than a conventional ***,the reconstruction of high-frequency information can be further promoted by introducing a perceptual loss and a generative adversarial network from the computer vision *** importantly,the experimental results provide valuable references for designing proper network architectures in the seismic inversion problem.

关键词： Seismic inversion Impedance Deep learning Network architecture

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Analysis and Improvement of TCP Congestion Control Mechanism Based on Global Optimization Model

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Wuhan University Journal of Natural Sciences 2001年第3期6卷 694-698页

作者： Pan Li Li sheng-hong Gu shang-jie Department of Electronic Engineering Shanghai Jiaotong University Shanghai 200030 China

Network flow control is formulated as a global optimization problem of user profit. A general global optimization flow control model is established. This model combined with the stochastic model of TCP is used to study the global rate allocation characteristic of TCP. Analysis shows when active queue management is used in network TCP rates tend to be allocated to maximize the aggregate of a user utility functionU s (called,U s fairness). The TCP throughput formula is derived An improved TCP congestion control mechanism is proposed. Simulations show its throughput is TCP friendly when competing with existing TCP and its rate change is smoother. Therefore, it is suitable to carry multimedia applications.

关键词： global optimization additive increase multiplicative decrease congestion control

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Emerging applications of near-infrared fluorescent metal nanoclusters for biological imaging

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Chinese Chemical Letters 2018年第10期29卷 1436-1444页

作者： jie Xu Li shang State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU) NPU-QMUL Joint Research Institute of Advanced Materials and Structures (JRI-AMAS) Northwestern Polytechnical University

Fluorescent metal nanoclusters（MNCs） have recently emerged as a novel kind of promising fluorescent probes for biological imaging because of their ultrasmall core size（〈2 nm）, strong photoluminescence,facile availability and good biocompatibility. In this review, we provide an update on recent advances in the development of near infrared（NIR）-emitting MNCs in terms of synthesis strategies and bioimaging applications. We mainly focus on the utilization of NIR-emitting MNCs（including Au, Ag, Cu and alloy NCs） either as single modal imaging（fluorescence intensity-based imaging, fluorescence lifetime imaging, two-photon imaging） probes or as multimodal imaging（such as NIR fluorescence/X-ray computed tomography/magnetic resonance imaging, NIR fluorescence/photoacoustic imaging/magnetic resonance imaging, NIR fluorescence/single photon emission computed tomography） probes in biological cells and tissues. Finally, we give a brief outlook on the future challenges and prospects of developing NIR-emitting MNCs for bioimaging.

关键词： Metal nanoclusters Fluorescent probes Cellular imaging In vivo Near-infrared

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Hybrid electric discharge plasma technologies for water decontamination:a short review

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Plasma Science and Technology 2019年第4期21卷 1-9页

作者： Kefeng shang jie LI School of Electrical Engineering.Dalian University of Technology.Dalian 116024 People's Republic of China Department of Applied Physics Ghent University.Sint-Pietersnieuwstraat 41 B4.9000 Gent.Belgium

Electric discharge plasma(EDP)can efficiently degrade aqueous pollutants by its in situ gen erated strong oxidative species(OH,0,***)“nd other physiochemical effects(UV irradiation,shockwaves,local high temperature,etc),but a high energy consumptions limit the application of EDP in water *** adsorbents,catalysts,and oxida nts have been employed for en hanci ng the degradation of pollutants by discharge *** hybrid plasma technologies offer improved water treatment performance compared to dischai'ge plasma *** paper reviews the water decontamination performance and mechanisms of these hybrid plasma technologies,and some suggestions on future water treatment technologies based on discharge plasma are also proposed.

关键词： discharge plasma plasma/adsorbent plasma/catalyst plasma/oxidant wastewater decontamination

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Morphometric study confirms the presence of only Vatica mangachapoi on Hainan Island, China

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Journal of Forestry Research 2018年第3期29卷 636-643页

作者： Junjie Guo Shuaibin shang jie Zeng Research Institute of Tropical Forestry CAF

To date only one species of the genus Vatica Linn.(Dipterocarpaceae) has been identified, and a subspecies and three varieties have been reported on Hainan Island, China. However, it remained controversial whether the species was Vatica mangachapoi or a new species Vatica hainanensis, and whether the subspecies or varieties are taxonomically valid. We evaluated here morphometric variations of 133 trees collected from nine populations and herbarium specimens of Vatica spp. using 16 traits of leaf and fruit. Among these, leaf traits varied more within and among populations than did fruit traits. Four traits of ratios were more stable than directly-measured traits within and among populations. The ranges of lamina length, lamina width and height of maximum lamina width point were the greatest among the 16 traits, while number of lateral veins varied least among the 12 directly-measured traits. Measurements from all 9 populations overlapped for each morphological trait, and variation of each trait was continuous among both individuals and populations. The range of variation did not distinguish any specimen from V mangachapoi as described in the flora of Southeast Asia By cluster analysis, individuals of each population as wel as specimens of each variety formed no distinct clusters The published varieties thus were characterized by no distinguishing variations in comparison with the nine sampled populations. In conclusion, the new species V hainanensis as well as the subspecies and varieties were not supported by our comparisons, and only V. man gachapoi without any subspecies or varieties occurs on Hainan Island, China.

关键词： Vatica Linn. Vatica mangachapoi Morphological variability Cluster analysis Hainan Island

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Assessment of impact of water diversion projects on ecological water uses in arid region

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Water Science and Engineering 2013年第2期6卷 119-130页

作者： Song-hao shang Hui-jie WANG State Key Laboratory of Hydroscience and Engineering Tsinghua University Yellow River Engineering Consulting Co. Ltd.

In arid regions, large-scale water diversion from rivers leads to significant changes in river flow regimes, which may have large impacts on ecological water uses of river-dependent ecosystems, such as river, lake, wetland, and riparian ecosystems. To assess the integrated impact of water diversion on ecological water uses, we proposed a hierarchy evaluation model composed of four layers representing the evaluation goal, sub-areas of the influenced region, evaluation criteria, and water diversion schemes, respectively. The evaluation criteria for different types of ecological water uses were proposed, and the analytical hierarchy process was used for the integrated assessment. For a river ecosystem, the percentage of mean annual flow was used to define the grade of environmental flow. For a lake ecosystem, water recharge to the lake to compensate the lake water losses was used to assess the ecological water use of a lake. The flooding level of the wetland and the groundwater level in the riparian plain were used to assess the wetland and riparian ecological water uses, respectively. The proposed model was applied to a basin in northern Xinjiang in northwest China, where both water diversion and inter-basin water transfer projects were planned to be carried out. Based on assessment results for the whole study area and two sub-areas, an appropriate scheme was recommended from four planning schemes. With the recommended scheme, ecological water uses of the influenced ecosystems can be maintained at an acceptable level. Meanwhile, economical water requirements can be met to a great extent.

关键词： arid region water diversion project environmental impact assessment ecological water use environmental flow riparian forest analytic hierarchy process

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Robust controller design for compound control missile with fixed bounded convergence time

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Journal of Systems Engineering and Electronics 2018年第1期29卷 116-133页

作者： YUN Yuhang TANG shengjing GUO jie shang Wei School of Aerospace Engineering Beijing Institute of Technology

A robust controller for bank to turn(BTT) missiles with aerodynamic fins and reaction jet control system(RCS) is developed based on nonlinear control dynamic models comprising couplings and aerodynamic uncertainties. The fixed time convergence theory is incorporated with the sliding mode control technique to ensure that the system tracks the desired command within uniform bounded time under different initial conditions. Unlike previous terminal sliding mode approaches, the bound of settling time is independent of the initial state, which means performance metrics like convergence rate can be predicted beforehand. To reduce the burden of control design in terms of robustness, extended state observer(ESO) is introduced for uncertainty estimation with the output substituted into the controller as feedforward compensation. Cascade control structure is employed with the proposed control law and therein the compound control signal is ***, control inputs for two kinds of actuators are allocated on the basis of their inherent characteristics. Finally, a number of simulations are carried out and demonstrate the effectiveness of the designed controller.

关键词： reaction jet control compound control fixed bounded convergence time sliding mode control extended state observer(ESO)

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Effect of sintering parameters on the microstructure and thermal conductivity of diamond/Cu composites prepared by high pressure and high temperature infiltration

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International Journal of Minerals,Metallurgy and Materials 2013年第2期20卷 180-186页

作者： Hui Chen Cheng-chang Jia shang-jie Li School of Materials Science and Engineering University of Science and Technology Beijing Shenzhen Haimingrun Industrial Co. Ltd.

Pure Cu composites reinforced with diamond particles were fabricated by a high pressure and high temperature （HPHT） infiltration technique. Their microstructural evolution and thermal conductivity were presented as a function of sintering parameters （temperature, pressure, and time）. The improvement in interfacial bonding strength and the maximum thermM conductivity of 750 W/（m.K） were achieved at the optimal sintering parameters of 1200℃, 6 GPa and 10 min. It is found that the thermal conductivity of the composites depends strongly on sintering pressure. When the sintering pressure is above 6 GPa, the diamond skeleton is detected, which greatly contributes to the excellent thermal conductivity.

关键词： metallic matrix composites particle reinforced composites copper diamonds infiltration microstructuralevolution thermal conductivity

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