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Positive effect of Mo on mechanical properties of a Ni-42W-10Co-xMo medium heavy alloy

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China Foundry 2025年第1期22卷 108-116页

作者： Guo-xin Cao Jian-xin Dong Yong-sheng He He Jiang fang hao Zhi-hua Nie Teng-fei Ma Bao-quan Fu School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Xi'an Superalloy Technology Co. Ltd.Xi’an 710299China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Key Laboratory of Air-driven Equipment Technology of Zhejiang Province Quzhou UniversityQuzhou 324000ZhejiangChina

In this study,a novel Ni-W-Co-Mo medium heavy alloy(MHA)was designed to improve its mechanical strength via Mo *** the Ni-42W-10Co-x Mo alloy series,where x represents the weight percent of Mo and varies between 0,1,2,5,and 10,the microstructure transitions from a dendritic structure to a hypo-eutectic structure as the Mo content increases from 0 to 5wt.%.Moreover,as the Mo content increases from 0 to 10wt.%,the distribution of theμ-phase shifts from being individually dispersed to forming aggregates,and its volume fraction rises from 0.5%to 7.9%.Notably,theμ-phase evolves into an eutectic microstructure,which helps in minimizing the segregation of *** change is accompanied by a substantial enhancement in mechanical properties;specifically,the compressive yield strength at room temperature increases from 350 MPa to 646 MPa,indicating a significant 85%***,the microhardness increases from 230 HV to 304 *** dynamics simulations further reveal that the strengthening mechanism of Ni-42W-10Co-x Mo alloys is Mo-induced solid solution strengthening and precipitation strengthening.

关键词： medium-heavy alloys Ni-based alloy mechanical properties solid solution strengthening precipitation strengthening

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Machine learning-based grayscale analyses for lithofacies identification of the Shahejie formation, Bohai Bay Basin, China

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Petroleum Science 2025年第1期22卷 42-54页

作者： Yu-Fan Wang Shang Xu fang hao Hui-Min Liu Qin-Hong Hu Ke-Lai Xi Dong Yang National Key Laboratory of Deep Oil and Gas China University of Petroleum (East China) Shengli Oilfield Branch Company SINOPEC

It is of great significance to accurately and rapidly identify shale lithofacies in relation to the evaluation and prediction of sweet spots for shale oil and gas reservoirs. To address the problem of low resolution in logging curves, this study establishes a grayscale-phase model based on high-resolution grayscale curves using clustering analysis algorithms for shale lithofacies identification, working with the Shahejie Formation, Bohai Bay Basin, China. The grayscale phase is defined as the sum of absolute grayscale and relative amplitude as well as their features. The absolute grayscale is the absolute magnitude of the gray values and is utilized for evaluating the material composition(mineral composition + total organic carbon) of shale, while the relative amplitude is the difference between adjacent gray values and is used to identify the shale structure type. The research results show that the grayscale phase model can identify shale lithofacies well, and the accuracy and applicability of this model were verified by the fitting relationship between absolute grayscale and shale mineral composition, as well as corresponding relationships between relative amplitudes and laminae development in shales. Four lithofacies are identified in the target layer of the study area: massive mixed shale, laminated mixed shale, massive calcareous shale and laminated calcareous shale. This method can not only effectively characterize the material composition of shale, but also numerically characterize the development degree of shale laminae, and solve the problem that difficult to identify millimeter-scale laminae based on logging curves, which can provide technical support for shale lithofacies identification, sweet spot evaluation and prediction of complex continental lacustrine basins.

关键词： Shale Machine learning Absolute grayscale Relative amplitude Grayscale phase model Lithofacies identification

Enrichment Mechanism and Prospects of Deep Oil and Gas

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Acta Geologica Sinica(English Edition) 2022年第3期96卷 742-756页

作者： hao fang Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao 266580China School of Geosciences China University of Petroleum(East China)Qingdao 266580China

With the deepening of oil and gas exploration,the importance of depth is increasingly *** risk of preservation of storage space in deep reservoirs is greater than that in shallow and medium *** layers mean older strata,more complex structural evolution and more complex hydrocarbon accumulation processes,and even adjustment and transformation of oil and gas *** paper systematically investigates the current status and research progress of deep oil and gas exploration around the world and looks forward to the future research focus of deep oil and *** the deep,especially the ultra-deep layers,carbonate reservoirs play a more important role than clastic ***,fault-karst and dolomite reservoirs are the main types of deep and ultra-deep *** common feature of most deep large and medium-sized oil and gas reservoirs is that they formed in the early with shallow *** activity and evolution of trap highs are the main ways to cause physical adjustment of oil and gas *** oil cracking and thermochemical sulfate reduction(TSR)are the main chemical modification effects in the ***-scale high-quality dolomite reservoirs is the main direction of deep oil and gas *** identification of oil and gas charging,adjustment and reformation processes is the key to understanding deep oil and gas ***-precision detection technology and high-precision dating technology are an important guarantee for deep oil and gas research.

关键词： deep oil and gas carbonate reservoir main accumulation period reservoir adjustment and reconstruction enrichment mechanism

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胶体光子晶体制备和应用研究进展

高分子学报 2025年第2期56卷 215-231页

作者：田丰黄翰闻田方浩赵国伟汪长春珠海光驭科技有限公司珠海519099 聚合物分子工程国家重点实验室复旦大学高分子科学系上海200433

光子晶体是通过不同折光指数的物质在空间中周期性排列来实现对光的选择性反射,从而产生结构色.胶体光子晶体因其构筑单元易于制备,成本低廉和应用广泛而备受关注.本文综述了胶体光子晶体的组装技术及其应用的最新进展和面临的挑战.胶... 详细信息

光子晶体是通过不同折光指数的物质在空间中周期性排列来实现对光的选择性反射,从而产生结构色.胶体光子晶体因其构筑单元易于制备,成本低廉和应用广泛而备受关注.本文综述了胶体光子晶体的组装技术及其应用的最新进展和面临的挑战.胶体光子晶体的组装主要采用自下而上法,包括基于物理力场的组装(如重力、离心力、电/磁场诱导组装)和流体动力学的组装(如毛细管力、剪切诱导组装).特别地,剪切诱导组装法因其在快速制备大尺寸光子晶体膜方面的潜力而受到关注.此外,还分析了不同组装技术的优缺点,并讨论了胶体光子晶体在传感器、防伪和信息显示等主要应用场景中的应用潜力及面临的机遇和挑战.最后,对光子晶体组装技术的发展趋势进行了展望,以期推动光子晶体材料的进一步发展和应用.

关键词：光子晶体单分散微球结构色分子介导剪切诱导组装

注采一体化自动转向工具的异形片弹簧特性研究

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现代制造工程 2025年第1期 71-79,120页

作者：周先军李海彭煜轩于富豪方豪中国石油大学(华东) 青岛266580 西南技术物理研究所成都610095

基于渤海油田中注采一体化管柱技术的实际应用和相关文献,以自动转向工具中的异形片弹簧为研究对象开展了性能分析,完成了异形片弹簧的高温压缩与为期1年的高温常压试验,得到了其高温条件下的力学性能变化情况,基于试验结果可知,异形片... 详细信息

基于渤海油田中注采一体化管柱技术的实际应用和相关文献,以自动转向工具中的异形片弹簧为研究对象开展了性能分析,完成了异形片弹簧的高温压缩与为期1年的高温常压试验,得到了其高温条件下的力学性能变化情况,基于试验结果可知,异形片弹簧在温度为250℃下工作约半年后达到了稳定状态,其最大弹力降低了约10%~30%,同时修正了异形片弹簧的材料参数,基于修正后的材料参数,对异形片弹簧的厚度与宽度进行了共35组全面尺寸仿真分析,得到了异形片弹簧厚度、宽度与最大弹力以及最大塑性变形间的关系曲线,并建立了其数学模型,为自动转向工具的实际应用提供参考。

关键词：异形片弹簧试验分析数值模拟本构模型

cDNA Cloning of Heat Shock Protein Genes and Their Expression in an Indigenous Cryptic Species of the Whitefly Bemisia tabaci Complex from China

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Journal of Integrative Agriculture 2012年第2期11卷 293-302页

作者： YU hao WAN fang-hao GUO Jian-ying State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of Agricultural Sciences Beijing 100081 P.R. China Department of Entomology Henan Institute of Science and Technology Xinxiang 453003 P.R.China

Thermal adaptation plays a fundamental role in shaping the distribution and abundance of insects,and heat shock proteins（Hsps）play important roles in the temperature adaptation of various *** better understand the temperature tolerance of the indigenous ZHJ2-biotype of whitefly Bemisia tabaci species complex,we obtained complete cDNA sequences for hsp90,hsp70,and hsp20 and analyzed their expression profiles under different high temperature treatments by real-time quantitative polymerase chain *** high temperature tolerance of *** ZHJ2-biotype was determined by survival rate after exposure to different high temperatures for 1 *** results showed that after 41°C heat-shock treatment for 1 h,the survival rates of ZHJ2 adults declined significantly and the estimated temperature required to cause 50% mortality（LT50）is 42.85°C for 1 *** for onset（Ton）or maximal（Tmax）induction of hsps expression in *** ZHJ2-biotype were 35 and 39°C（or 41°C）.Compared with previous studies,indigenous ZHJ2-biotype exhibits lower heat temperature stress tolerance and Ton（or Tmax）than the invasive B-biotype.

关键词： Bemisia tabaci biological invasion thermotolerance indigenous and invasive biotypes heat shock protein (hsp)

Multi-User File-Sharing Systems Based on LWE

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China Communications 2020年第7期17卷 166-182页

作者： Xuyang Wang Aiqun Hu hao fang Southeast University Nanjing 210096China Purple Mountain Laboratories Nanjing 210000China UPSEC Cyber INC.Nanjing 210096 China.

Multi-user file-sharing plays an important role in the cloud *** allows different users to share files via the ***,it usually faces many security issues because the cloud is usually public and *** overcome these issues,we propose multi-user file-sharing systems(MFS)in this *** to the date sources,we propose two frameworks of MFS based on the framework of proxy re-encryption(PRE),unique source(uni-source)MFS and multi-source *** formalize the security models,which contain ciphertext security,secret key security and master secret *** the frameworks,we propose two secure and efficient MFS schemes based on LWE,the uni-source MFS UM and the multi-source MFS *** prove that UM is secret key and ciphertext security,and MM is secret key,master secret and ciphertext security with the hardness assumptions of LWE and ***,we prove they have some useful properties,such as non-interactive and anonymous.

关键词： interactive framework LWE

Plant protection: Current status, progress and challenges in China

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Journal of Integrative Agriculture 2019年第4期18卷 703-704页

作者： WAN fang-hao State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of Agricultural Sciences Agricultural Genomics Institute at Shenzhen Chinese Academy of Agricultural Sciences

China is one of the countries in the world that is severely damaged by crop diseases,pests,and *** are more than 1 700 species of agricultural pests occurring annually,53 of which are on the list of the 100 worst pests in the world(Chen and Wang 2014;Wu 2018).Currently,China is still greatly challenged by a growing problem of agricultural pests that th reate n the economy and health and pose ecological risks underthe conditions of global climate change,economic integration,crop structure adjustment and so *** protect!on agai nst crop diseases,in sect pests and noxious weeds is necessary to ensure high-quality crop production and food ***,traditional strategies of plant protect!on have mainly involved chemical pesticides.

关键词： Plant protection crop diseases agricultural pests

Experimental Investigation and X-Ray Computed Microtomography Simulation on Thermal Physical Properties of Foundation Materials after Molten Salt Leakage in the Storage Tank

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Journal of Thermal Science 2024年第2期33卷 591-601页

作者： WANG Zhaowen ZHOU hao LUO Jiawei LI Yawei fang hao LIU Tianxiao State Key Laboratory of Clean Energy Utilization Institute for Thermal Power EngineeringZhejiang UniversityHangzhou310027China

This paper studied the thermal physical properties of foundation materials in the molten salt tank of thermal energy storage system after molten salt leakage by Transient plane source experiment and X-ray computed microtomography simulation *** microstructure,thermal properties and pressure resistance with different particle diameters were *** measured heat conductivities from Transient plane source experiment for three cases are 0.49 W/(m·K),0.48 W/(m·K),and 0.51 W/(m·K),and the porosity is 30.1%,30.7%,and 31.2% *** heat conductivity simulating results of three cases are 0.471 W/(m·K),0.482W/(m·K),and 0.513 W/(m·K).The ratio of difference between the results of simulation and Transient plane source measurement is as low as 1.2%,verifying the reliability of experimental and simulation results to a certain *** with the heat conductivity of 0.097-0.129 W/(m·K) and porosity of 71.6%-78.9% without leaking salt,the porosity is reduced by more than 50% while the heat conductivity increased by 4 to 5 times after molten salt *** significant increase in heat conductivity has a great impact on security operation,structure design,and modeling of the tank foundation for solar power plants.

关键词： heat conductivity X-ray computed microtomography foundation materials three-phase threshold algorithm molten salt leakage