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我国国家情报监督体系构建研究

情报杂志 2025年第2期44卷 38-43,81页

作者：吴常青张春晖天津商业大学法学院天津300134

[研究目的]涉及公权力运用的国家情报工作需要制约和监督。将我国国家情报监督置于党和国家监督体系进行阐释,为推进情报治理体系和治理能力现代化提供智力支持。[研究方法]采用思辨分析和比较研究方法,梳理我国国家情报监督的体系构成... 详细信息

[研究目的]涉及公权力运用的国家情报工作需要制约和监督。将我国国家情报监督置于党和国家监督体系进行阐释,为推进情报治理体系和治理能力现代化提供智力支持。[研究方法]采用思辨分析和比较研究方法,梳理我国国家情报监督的体系构成,分析我国国家情报监督机制存在的问题,并提出完善路径。[研究结果/结论]我国国家情报监督体系由党内监督、国家机关监督和社会监督构成,但国家情报监督机制仍存在国家情报权力配置的科学性有待加强、国家情报工作监督制约机制尚不完善、国家情报权力运行缺乏透明度等问题。我国国家情报监督的完善应以科学配置国家情报权力,明晰国家情报权力的边界、完善国家情报工作监督制约机制、坚持国家情报工作公开与秘密相结合原则,健全国家情报工作适度公开制度为基本路径。

关键词：国家情报工作情报监督情报监督体系监督制约国家情报权力《中华人民共和国国家情报法》

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基于冲击响应分析的燃机冲击测点优化

振动与冲击 2025年第4期44卷 244-252页

作者：汪浩张春辉赵鹏铎闫明金映丽沈阳工业大学机械工程学院沈阳110870 中国人民解放军海军研究院北京100161

为研究舰用燃机在水下爆炸环境试验中测点布置问题,建立经试验验证的数值仿真模型,采用时域模拟法对燃机整体及部件的冲击响应特性进行了分析,揭示了冲击荷载在燃机整体及关键部件中的传递规律,为后续的测点优化方案提供支撑。分析结果... 详细信息

为研究舰用燃机在水下爆炸环境试验中测点布置问题,建立经试验验证的数值仿真模型,采用时域模拟法对燃机整体及部件的冲击响应特性进行了分析,揭示了冲击荷载在燃机整体及关键部件中的传递规律,为后续的测点优化方案提供支撑。分析结果表明:冲击荷载主要沿燃机底架、主支撑等关键部件传递至燃机内部结构,根据冲击响应传递规律确定了反映燃机模拟装置冲击响应的关键部件和测点布置的初步位置;在此基础上针对冲击荷载传递路径上的底架、支架等关键部位进行细化分析,得出了每个关键部件的冲击响应传递规律,对比发现了每个关键部件的冲击响应最大峰值及部位,结合实际测量经验,优化确定了测点位置,解决了舰船关重设备在抗冲击试验中的测点分布问题。其研究成果可直接应用于舰船关重设备的抗冲击试验测试,对冲击试验测试效率有一定的提升,也可用于舰船关重设备的冲击响应分析,有较强的工程应用价值。

关键词：抗冲击燃机测点优化时域模拟法

Monte Carlo simulation of GEM-based for 14 MeV neutron detector

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Science China(Physics,Mechanics & Astronomy) 2013年第9期56卷 1740-1744页

作者： WANG XiaoDong zhang YuLian zhang chunhui HU BiTao School of Nuclear Science and Technology Lanzhou University

A new concept of neutron detector based on Gas Electron Multiplier(GEM) technology is presented in this paper,in which a novel multi-layer high density polyethylene(HDPE) as neutron-to-proton converter is proposed and studied with Geant4 toolkit for fast 14 MeV *** preliminary results show that the detection efficiency of the detector with 400 converter units is higher than 2.3% and reconstruction accuracy of the incident neutron position is higher than 2.6%.

关键词： gas electron multiplier 14 MeV neutron detection efficiency position reconstruction

Round empty core infiltration and anti-filtration recharge wells and laboratory recharge tests

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Frontiers of Earth Science 2020年第2期14卷 298-305页

作者： Yuxi LI Wanglin LI Jiapeng HE chunhui zhang School of Water Conservancy and Environment University of JinanJinan 250022China

Anti-filtration recharge wells are commonly installed in river channels and irrigation canals on the Shandong Peninsula,China,and can be used as an important recharge facility for underground ***,during recharge,as the running time increases,the recharge capacity gradually *** study was undertaken to develop a new recharge well and mitigate this deficiency.A round empty core infiltration and antifiltration recharge well and laboratory recharge test equipment were ***,1:25 models of the recharge pond,a round empty core recharge wellhead,and an artificial recharge well were *** equal recharge levels and ambient groundwater levels,laboratory steady-flow recharge tests on the existing anti-filtration recharge well,the new round empty core infiltration and anti-filtration recharge well,and an artificial recharge well were carried *** data on the measured groundwater table and single-well recharge quantity were also collected and *** results showed that compared with the existing anti-filtration recharge well,the new round empty core infiltration and anti-filtration recharge well had stronger anti-deposition and anti-scouring properties,and the single-well recharge quantity increased by 403%.With an increase in the number of recharge tests,the single-well recharge quantity gradually decreased and tended to stabilize as a whole.

关键词： recharge well infiltration function anti-filtration function recharge quantity recharge test

基于水-土-管耦合分析平台的海底管道在位稳定性研究

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岩土工程学报 2025年第3期47卷 618-626页

作者：孟垂乾王乐张春会王智超田英辉天津大学建筑工程学院天津300350 水利工程智能建设与运维全国重点实验室天津300350 北京怀柔实验室北京101499 河北科技大学建筑工程学院河北石家庄050018 河北省岩土与结构体系防灾减灾技术创新中心河北石家庄050018 湘潭大学土木工程学院湖南湘潭411105 墨尔本大学工程学院维多利亚墨尔本3010

海底管道是深海油气工程中的关键组成部分,其在位稳定性受波流荷载、周围土体抗力及管道自身特性等因素的影响,现有分析方法难以准确评估水-土-管耦合作用下的海底管道在位稳定性。为此,首先利用FORTRAN编程语言分别建立了管-水作用分... 详细信息

海底管道是深海油气工程中的关键组成部分,其在位稳定性受波流荷载、周围土体抗力及管道自身特性等因素的影响,现有分析方法难以准确评估水-土-管耦合作用下的海底管道在位稳定性。为此,首先利用FORTRAN编程语言分别建立了管-水作用分析程序与管-土作用分析程序。管-水作用分析程序采用傅里叶分析法计算作用在管道上的水动力荷载,并依据管道位移变化对该荷载进行实时修正;管-土作用分析程序基于已有的管土相互作用模型,计算管道在发生运动时受到的水平向土抗力。随后,基于有限元分析软件ABAQUS中的DLOAD与UEL子程序将上述程序进行耦合,最终形成用以分析海底管道在位稳定性的水-土-管耦合分析平台。利用该计算分析平台,综合考虑海况条件、土体性质及管道外形参数等因素对管道在位稳定性的影响,为实际工程中海底管道的在位稳定性分析提供了参考。

关键词：海底管道计算平台稳定分析水动力管土相互作用

Numerical modeling of permeability evolution based on degradation approach during progressive failure of brittle rocks

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International Journal of Mining Science and Technology 2016年第4期26卷 535-542页

作者： zhang chunhui Yue Hongliang Zhao Quansheng Wang Laigui School of Civil Engineering Hebei University of Science and Technology Shijiazhuang 050018 China School of Mechanics and Engineering Liaoning Technical University Fuxin 123000 China

The permeability evolution of rock during the progressive failure process is described. In combination with the strength degradation index, the degradation formulas of s and a, which are dependent on the plastic confining strain component, the material constants of Hock-Brown failure criterion are presented, and a modified elemental scale elastic-brittle-plastic constitutive model of rock is established. The rela- tionship between volumetric strain and permeability through tri-axial compression is investigated. Based on the above, a permeability evolution model is established. The model incorporates confining pressure- dependent degradation of strength, dilatancy and corresponding permeability evolution. The model is implemented in FLAC by the FISH function method. The permeability evolution behavior of rock is inves-tigated during the progressive failure process in a numerical case. The results show that the model is cap- able of reproducing, and allowing visualization of a range of hydro-mechanical responses of rock. The effects of confining pressure on degradation of strength, dilatancy and permeability evolution are also reflected.

关键词： Hoek-Brown failure criterion Dilatancy Permeability evolution Confining pressure Degradation of strength

Distribution of methylsiloxanes in benthic mollusks from the Chinese Bohai Sea

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Journal of Environmental Sciences 2019年第2期31卷 199-207页

作者： Liqin Zhi Lin Xu Xudan He chunhui zhang Yaqi Cai State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental ScienceChinese Academy of Sciences University of Chinese Academy of Sciences Environmental Protection Research Institute of Light Industry School of Chemical & Environmental Engineering China University of Mining & Technology(Beijing) Institute of Environment and Health Jianghan University

Methylsiloxanes are a class of silicone compounds that have been widely used in various industrial processes and personal care products for several decades. This study investigated the spatial distribution of three cyclic methylsiloxanes(D4–D6) and twelve linear methylsiloxanes(L5–L16) in mollusks collected from seven cities along the Bohai Sea. D4–D6(df = 71%–81%) and L8–L16(df = 32%–40%) were frequently detectable in the mollusk samples, while L5–L7 were not found in any mollusk samples. Cyclic methylsiloxanes(D4–D6) were found in mollusks with the mean concentrations of 15.7 ± 12.3 ng/g ww for D4,24.6 ± 15.8 ng/g ww for D5 and 34.0 ± 23.0 ng/g ww for D6. Among the seven sampling cities, the cyclic methylsiloxanes were predominant in mollusks, with the total cyclic methylsiloxanes(sum of D4–D6, ∑ CMS) accounting for 74.2%–80.7% of the total methylsiloxanes. ∑ CMS along the coastline demonstrated a clear gradient, with the highest concentrations in mollusks at the sampling sites located in the western part of the Bohai Sea and the lowest concentrations in mollusks from cities located in the eastern part of the Bohai Sea. The biota-sediment accumulation factors for cyclic methylsiloxanes(D4–D6) and linear methylsiloxanes(L8–L16) were estimated as 0.42 ± 0.06–0.53 ± 0.06 and0.13 ± 0.03–0.19 ± 0.05, respectively.

关键词： Methylsiloxane Mollusks Sediment Bioaccumulation

Explainable machine learning model for predicting molten steel temperature in the LF refining process

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International Journal of Minerals,Metallurgy and Materials 2024年第12期31卷 2657-2669页

作者： Zicheng Xin Jiangshan zhang Kaixiang Peng Junguo zhang chunhui zhang Jun Wu Bo zhang Qing Liu State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China School of Automation and Electrical Engineering University of Science and Technology BeijingBeijing 100083China Tangshan Branch Hebei Iron and Steel Co.Ltd.Tangshan 063000China Xinjiang Bayi Iron and Steel Co. Ltd.Baosteel GroupUrumqi 830022China Lvliang Jianlong Industrial Co. Ltd.Lvliang 032100China

Accurate prediction of molten steel temperature in the ladle furnace(LF)refining process has an important influence on the quality of molten steel and the control of steelmaking *** research on establishing models to predict molten steel temperature has been ***,most researchers focus solely on improving the accuracy of the model,neglecting its *** present study aims to develop a high-precision and explainable model with improved reliability and *** eXtreme gradient boosting(XGBoost)and light gradient boosting machine(LGBM)were utilized,along with bayesian optimization and grey wolf optimiz-ation(GWO),to establish the prediction *** performance evaluation metrics and graphical representations were applied to compare the optimal XGBoost and LGBM models obtained through varying hyperparameter optimization methods with the other *** findings indicated that the GWO-LGBM model outperformed other methods in predicting molten steel temperature,with a high pre-diction accuracy of 89.35%within the error range of±5°*** model’s learning/decision process was revealed,and the influence degree of different variables on the molten steel temperature was clarified using the tree structure visualization and SHapley Additive exPlana-tions(SHAP)***,the explainability of the optimal GWO-LGBM model was enhanced,providing reliable support for prediction results.

关键词： ladle furnace refining molten steel temperature eXtreme gradient boosting light gradient boosting machine grey wolf op-timization SHapley Additive exPlanation

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构皮浆弱碱性过氧化氢漂白工艺研究

中国造纸 2025年第1期44卷 128-140页

作者：刘江侯敏杰胡永康刘传富张春辉蓝武华南理工大学轻工科学与工程学院广东广州510640

本研究以实验室自制构皮浆为原料,使用Na_(2)CO_(3)-H_(2)O_(2)工艺进行漂白实验,分别探究了H_(2)O_(2)用量、反应时间、反应温度对构皮浆漂白效果的影响。为了提高最优工艺参数的精准度,对Na_(2)CO_(3)-H_(2)O_(2)工艺进行响应面法优... 详细信息

本研究以实验室自制构皮浆为原料,使用Na_(2)CO_(3)-H_(2)O_(2)工艺进行漂白实验,分别探究了H_(2)O_(2)用量、反应时间、反应温度对构皮浆漂白效果的影响。为了提高最优工艺参数的精准度,对Na_(2)CO_(3)-H_(2)O_(2)工艺进行响应面法优化。结果表明,在H_(2)O_(2)用量2.9%、反应时间87 min、反应温度82℃的条件下,构皮浆白度达76.6%,聚合度从未漂浆的2704下降至1886。与现有书画纸用构皮浆的次氯酸盐工艺及NaOH-H_(2)O_(2)工艺相比,Na_(2)CO_(3)-H_(2)O_(2)工艺对纤维损伤更小,漂白效率更高。以Na_(2)CO_(3)-H_(2)O_(2)工艺制备的构皮浆具有白度稳定、物理强度高、耐老化性能更好、所抄纸张润墨性能良好等优点。

关键词：构皮浆 H_(2)O_(2)漂白 Na_(2)CO_(3) 响应面书画纸

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