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Geohazard Mechanics 2024年第3期2卷 216-224页

作者： Gang wang Hongrui zhao lianpeng Dai Haojun wang Jinguo Lyu Jianzhuo zhang School of Environmental Liaoning UniversityShenyang110036China Coal Science and Technology Group Shenyang Research Institute Shenyang110015China Institute of Disaster Rock Mechanics Liaoning UniversityShenyang110036China liaoning Key Laboratory of Mining Environment and Disaster Mechanics Liaoning Technical UniversityFuxin123000China Department of Civil Engineering Monash UniversityVictoria3800Australia School of Mechanics and Engineering Liaoning Technical UniversityFuxin123000China School of Mechanical Engineering Liaoning Technical UniversityFuxin123000China

Effective monitoring techniques and equipment are essential for the prevention and control of coal and rockdynamic disasters such as rockburst. Based on the fact that there is charge generation during deformation andrupture of coal rock body and the charge signals contain a large amount of information about the mechanicalprocess of deformation and rupture of coal rock, the rockburst charge sensing monitoring technology has beenformed. In order to improve the charge sensing technology for monitoring and early warning of rockburst disasters, this paper develops a new generation of portable coal rock charge monitoring instrument on the basis ofthe original instrument and carries out laboratory and underground ﬁeld application. The primary advancementinvolves enhancing the external structure of the sensor and increasing the charge sensing area, which can morecomprehensively capture the charge signals from the loaded rupture of the coal rock body. The overall structure ofthe data acquisition instrument has been improved, the monitoring channels have been increased, and thefunction of displaying the monitoring data curve has been added, so that the coal and rock body force status canbe grasped in time. The results of the experimental study show that the abnormal charge signals can be monitoredduring the rupture process of rock samples under loading, and the monitored charge signals are in good agreement with the sudden change of stress in the rock samples and the formation of crack extension. There is aprecursor charge signal before the stress mutation, and the larger the loading rate is, the earlier the precursorcharge signal appears. The charge monitoring instrument can monitor the charge signal of the coal seam roadwayunder strong mining pressure. In the zone of elevated overburden pressure, the amount of induced charge is large,and anomalously high value charge signals can be monitored when a coal shot occurs. The change trend of thecharge at different measuring point

关键词： Rockburst Charge monitoring instrument Man-machine dialogue Stress distribution Monitor

超亲氮化碳-硅藻土复合滤层油包水乳液快速破乳

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石油与天然气化工 2024年第1期53卷 90-97页

作者：何赟艺张兴杨蒋炜王唯李遵照王佩弦贾旭东赵鹏四川大学化学工程学院中国石化(大连)石油化工研究院有限公司中国石油化工股份有限公司西北油田分公司

目的实现高黏度油品油包水乳液的快速高效破乳。方法以三聚氰胺为原料,通过热聚法制备超亲水材料氮化碳,采用制备的氮化碳混合硅藻土制备复合滤饼,通过抽滤实现高黏度油包水乳液快速破乳。结果含质量分数为1.5%氮化碳的0.5 cm氮化碳-硅... 详细信息

目的实现高黏度油品油包水乳液的快速高效破乳。方法以三聚氰胺为原料,通过热聚法制备超亲水材料氮化碳,采用制备的氮化碳混合硅藻土制备复合滤饼,通过抽滤实现高黏度油包水乳液快速破乳。结果含质量分数为1.5%氮化碳的0.5 cm氮化碳-硅藻土滤饼可实现水含量在6%(w)以内,乳滴粒径在2.32μm及以上,油包水乳液完全破乳,20 kPa真空度的破乳速率可达3.57 L/min,破乳效率为97.36%,油回收率为99.72%以上;增大破乳用滤饼厚度,可用于更高含水量乳液的破乳;破乳基于超亲氮化碳对水的强吸引力和硅藻土微孔破碎共同作用。结论氮化碳-硅藻土滤饼可实现油包水乳液快速高效破乳,具工业实用前景。

关键词：超亲水材料氮化碳硅藻土高黏度油品油包水乳液破乳

基于响应面法的煤矸石氯化焙烧除铁工艺参数优化

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煤炭转化 2024年第1期47卷 81-90页

作者：张雨涵赵雪淞李婷婷王雪松张婷辽宁工程技术大学矿业学院辽宁阜新123000 辽宁工程技术大学理学院辽宁阜新123000 华电金沙江上游水电开发有限公司巴塘分公司四川甘孜626700 辽宁工程技术大学材料科学与工程学院辽宁阜新123000

为解决煤矸石氯化焙烧除铁过程中氯化剂消耗量过高、焙烧时间掌握不准以及除铁率难以达到期望值的问题,以CaCl_(2)作为氯化剂对煤矸石进行氯化焙烧除铁,在焙烧温度分别为600℃,700℃,800℃,900℃,1000℃,CaCl_(2)添加量(质量分数)分别为... 详细信息

为解决煤矸石氯化焙烧除铁过程中氯化剂消耗量过高、焙烧时间掌握不准以及除铁率难以达到期望值的问题,以CaCl_(2)作为氯化剂对煤矸石进行氯化焙烧除铁,在焙烧温度分别为600℃,700℃,800℃,900℃,1000℃,CaCl_(2)添加量(质量分数)分别为5%,10%,15%,20%,25%,焙烧时间分别为90 min,120 min,150 min,180 min,210 min的单因素实验基础上,通过Design-Expert13.0.6软件设计和优化了煤矸石氯化焙烧除铁实验。通过方差分析、等高线分析、响应面分析证明了模型的可靠并分析了各变量之间的交互影响关系。运用响应面优化法以除铁率为指标优化了工艺参数。结果表明:焙烧温度与焙烧时间交互最为显著,CaCl_(2)添加量与焙烧时间交互最低。各影响因子按影响显著性由大到小依次为焙烧温度、CaCl_(2)添加量、焙烧时间;随着焙烧温度升高除铁率进一步提升,由于焙烧温度超过1000℃后产物会转为莫来石,因此控制焙烧温度不超过950℃,当CaCl_(2)添加量达到15%时除铁率最好,超过这一添加量会降低除铁率,焙烧时间达到180 min时除铁率基本上达到了最高值,继续延长焙烧时间对除铁率的影响不大;对响应面模型预测并优化后得到了最佳的工艺条件,即焙烧温度为915℃,CaCl_(2)添加量为15%,焙烧时间为175 min,在此条件下除铁率达到了95.23%,实验值与预测值基本一致。

关键词：煤矸石氯化焙烧除铁率响应曲面法高岭土

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CEPC technical Design Report

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Radiation Detection Technology and Methods 2024年第1期8卷 I0003-I0016,1-1091页

作者： Waleed Abdallah Tiago Carlos Adorno de Freitas Konstantin Afanaciev Shakeel Ahmad Ijaz Ahmed Xiaocong Ai Abid Aleem Wolfgang Altmannshofer Fabio Alves Weiming An Rui An Daniele Paolo Anderle Stefan Antusch Yasuo Arai Andrej Arbuzov Abdesslam Arhrib Mustafa Ashry Sha Bai Yu Bai Yang Bai Vipul Bairathi Csaba Balazs Philip Bambade Yong Ban Tripamo Bandyopadhyay Shou-Shan Bao Desmond P.Barber Ayse Bat Varvara Batozskaya Subash Chandra Behera Alexander Belyaev Michele Bertucci Xiao-Jun Bi Yuanjie Bi Tianjian Bian Fabrizio Bianchi Thomas Biekotter Michela Biglietti Shalva Bilanishvili Deng Binglin Denis Bodrov Anton Bogomyagkov Serge Bondarenko Stewart Boogert Maarten Boonekamp Marcello Borri Angelo Bosotti Vincent Boudry Mohammed Boukidi Igor Boyko Ivanka Bozovic Giuseppe Bozzi Jean-Claude Brient Anastasiia Budzinskaya Masroor Bukhari Vladimir Bytev Giacomo Cacciapaglia Hua Cai Wenyong Cai Wujun Cai Yijian Cai Yizhou Cai Yuchen Cai Haiying Cai Huacheng Cai Lorenzo Calibbi Junsong Cang Guofu Cao Jianshe Cao Antoine Chance Xuejun Chang Yue Chang Zhe Chang Xinyuan Chang Wei Chao Auttakit Chatrabhuti Yimin Che Yuzhi Che Bin Chen Danping Chen Fuqing Chen Fusan Chen Gang Chen Guoming Chen Hua-Xing Chen Huirun Chen Jinhui Chen Ji-Yuan Chen Kai Chen Mali Chen Mingjun Chen Mingshui Chen Ning Chen Shanhong Chen Shanzhen Chen Shao-Long Chen Shaomin Chen Shiqiang Chen Tianlu Chen Wei Chen Xiang Chen Xiaoyu Chen Xin Chen Xun Chen Xurong Chen Ye Chen Ying Chen Yukai Chen Zelin Chen Zilin Chen Gang Chen Boping Chen Chunhui Chen Hok Chuen Cheng Huajie Cheng Shan Cheng Tongguang Cheng Yunlong Chi Pietro Chimenti Wen Han Chiu Guk Cho Ming-Chung Chu Xiaotong Chu Ziliang Chu Guglielmo Coloretti Andreas Crivellin Hanhua Cui Xiaohao Cui zhaoyuan Cui Brunella D'Anzi ling-Yun Dai Xinchen Dai Xuwen Dai Antonio De Maria Nicola De Filippis Christophe De La Taille Francesca De Mori Chiara De Sio Elisa Del Core Shuangxue Deng Wei-Tian Deng Zhi Deng Ziyan Deng Bhupal Dev Tang Dewen Biagio Di Micco Ran Ding Siqin Dingl Yadong Ding Haiyi Dong Jianin AGH university of Science and Technology Faculty of Physics and Applied Computer ScienceKrakow Anhui university HefeiAnhui Applied Physics Department Federal Urdu University of ArtsScience and TechnologyIslamabad Banaras Hindu university Institute of ScienceVaranasi Bandirma Onyedi Eylul university Bandirma Beihang university Beijing Beijing Computational Science Research Center Beijing Beijing Conveyi LTD Beijing Beijing Glass Research Institute Co. LtdBeijing Beijing Institute of Technology Beijing Beijing Normal university Beijing Brown university ProvidenceRI Budker Institute of Nuclear Physics Novosibirsk Cadi Ayyad university Laboratory of Fundamental and Applied PhysicsPolydisciplinary FacultyMarrakech Cairo university Giza Center for Theory and Computation National Tsing Hua UniversityHsinchu Central china Normal university WuhanHubei Central South university ChangshaHunan Centro de Fisica Teorica de Particulas Universidade Tecnica de LisboaLisboa Chengdu KaitengSifang Digital Radio&TV Equipment Co. LtdChengduSichuan china academy of engineering physics MianyangSichuan china building materials academy Beijing china Center of Advanced Science and Technology Beijing china Institute of Atomic Energy Beijing china Jiliang university HangzhouZhejiang china Nuclear Instrument CO. LTDBeijing china university of Geosciences Beijing china university of Geosciences WuhanHubei china university of Mining and Technology XuzhouJiangsu china West Normal university NanchongSichuan Chongqing university Department of PhysicsChongqing Chulalongkorn university Bangkok City university of Hong Kong Department of PhysicsHong Kong Cockcroft Institute Daresbury Cornell university IthacaNY CPPM(AMU/IPhU&CNRS/INP) Marseille Dalian Minzu university DalianLiaoning Dalian university of Technology Department of PhysicsDalian Deutsches Elektronen-Synchrotron DESY Hamburg Dzhelepov Laboratory of Nuclear Problems of Joint Institute for Nuclear Research(DLNP JINR) Dubna East china university Of Science And Technol

The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by china,fostered through extensive collaboration with international *** complex comprises four accelerators:a 30 GeV linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The linac and Damping Ring are situated on the surface,while the subterranean Booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super Proton Proton Collider(SPPC).The CEPC primarily serves as a Higgs *** its baseline design with synchrotron radiation(SR)power of 30 MW per beam,it can achieve a luminosity of 5×10^(34)cm^(-2)s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13 ab^(-1)for two IPs over a decade,producing 2.6 million Higgs *** the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3 million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of *** technical Design Report(TDR)follows the Preliminary Conceptual Design Report(Pre-CDR,2015)and the Conceptual Design Report(CDR,2018),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering ***,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection *** is anticipated to begin around 2027-2028,pending government approval,with an estimated duration of 8 *** commencement of experiments and data collection could potentially be initiated in the mid-2030s.

关键词： initiated exceeding precise

STCF conceptual design report (Volume 1): Physics & detector

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Frontiers of physics 2024年第1期19卷 1-154页

作者： M.Achasov X.C.Ai L.P.An R.Aliberti Q.An X.Z.Bai Y.Bai O.Bakina A.Barnyakov V.Blinov V.Bobrovnikov D.Bodrov A.Bogomyagkov A.Bondar I.Boyko Z.H.Bu F.M.Cai H.Cai J.J.Cao Q.H.Cao X.Cao Z.Cao Q.Chang K.T.Chao D.Y.Chen H.Chen H.X.Chen J.F.Chen K.Chen L.L.Chen P.Chen S.L.Chen S.M.Chen S.Chen S.P.Chen W.Chen X.Chen X.F.Chen X.R.Chen Y.Chen Y.Q.Chen H.Y.Cheng J.Cheng S.Cheng T.G.Cheng J.P.Dai L.Y.Dai X.C.Dai D.Dedovich A.Denig I.Denisenko J.M.Dias D.Z.Ding L.Y.Dong W.H.Dong V.Druzhinin D.S.Du Y.J.Du Z.G.Du L.M.Duan D.Epifanov Y.L.Fan S.S.Fang Z.J.Fang G.Fedotovich C.Q.Feng X.Feng Y.T.Feng J.L.Fu J.Gao Y.N.Gao P.S.Ge C.Q.Geng L.S.Geng A.Gilman L.Gong T.Gong B.Gou W.Gradl J.L.Gu A.Guevara L.C.Gui A.Q.Guo F.K.Guo J.C.Guo J.Guo Y.P.Guo Z.H.Guo A.Guskov K.L.Han L.Han M.Han X.Q.Hao J.B.He S.Q.He X.G.He Y.L.He Z.B.He Z.X.Heng B.L.Hou T.J.Hou Y.R.Hou C.Y.Hu H.M.Hu K.Hu R.J.Hu W.H.Hu X.H.Hu Y.C.Hu J.Hua G.S.Huang J.S.Huang M.Huang Q.Y.Huang W.Q.Huang X.T.Huang X.J.Huang Y.B.Huang Y.S.Huang N.Hüsken V.Ivanov Q.P.Ji J.J.Jia S.Jia Z.K.Jia H.B.Jiang J.Jiang S.Z.Jiang J.B.Jiao Z.Jiao H.J.Jing X.L.Kang X.S.Kang B.C.Ke M.Kenzie A.Khoukaz I.Koop E.Kravchenko A.Kuzmin Y.Lei E.Levichev C.H.li C.li D.Y.li F.li G.li G.li H.B.li H.li H.N.li H.J.li H.L.li J.M.li J.li L.li L.li L.Y.li N.li P.R.li R.H.li S.li T.li W.J.li X.li X.H.li X.Q.li X.H.li Y.li Y.Y.li Z.J.li H.liang J.H.liang Y.T.liang G.R.liao L.Z.liao Y.liao C.X.lin D.X.lin X.S.lin B.J.liu C.W.liu D.liu F.liu G.M.liu H.B.liu J.liu J.J.liu J.B.liu K.liu K.Y.liu K.liu L.liu Q.liu S.B.liu T.liu X.liu Y.W.liu Y.liu Y.L.liu Z.Q.liu Z.Y.liu Z.W.liu I.Logashenko Y.Long C.G.Lu J.X.Lu N.Lu Q.F.Lü Y.Lu Y.Lu Z.Lu P.Lukin F.J.Luo T.Luo X.F.Luo Y.H.Luo H.J.Lyu X.R.Lyu J.P.Ma P.Ma Y.Ma Y.M.Ma F.Maas S.Malde D.Matvienko Z.X.Meng R.Mitchell A.Nefediev Y.Nefedov S.L.Olsen Q.Ouyang P.Pakhlov G.Pakhlova X.Pan Y.Pan E.Passemar Y.P.Pei H.P.Peng L.Peng X.Y.Peng X.J.Peng K.Peters S.Pivovarov E.Pyata B.B.Qi Y.Q.Qi W.B.Qian Y.Qian C.F.Qiao J.J.Qin J.J.Qin L.Q.Qin X.S.Qin T.L.Qiu J.Rademacker C.F.Redmer H.Y.Sang Anhui university Hefei 230039China Beihang university Beijing 100191China Budker Institute of Nuclear Physics Novosibirsk 630090Russia CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Cavendish Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom Central china Normal university Wuhan 430079China Central South university Changsha 410083China china university of Geosciences Wuhan 430074China china university of Mining and Technology Xuzhou 221116China École Polytechnique Fédérale de Lausanne(EPFL) LausanneSwitzerland Fudan university Shanghai 200433China Goethe university Frankfurt D-60325 Frankfurt am MainGermany Guangxi Normal university Guilin 541004China Guangxi Uninversity Nanning 530004China Hangzhou Institute for Advanced Study UCASHangzhou 310024China Hebei Normal university Shijiazhuang 050024China Hebei university Baoding 071002China Hefei university of Technology Hefei 230601China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal university Xinxiang 453007China Henan university Kaifeng 475004China High Energy Physics Center Chung-Ang UniversitySeoul 06974Korea Higher School of Economy 11 Pokrovsky Bulvar Moscow 109028Russia Huangshan university Huangshan 245000China Hubei university of Automotive Technology Shiyan 442002China Hunan Normal university Changsha 410081China Hunan university of Science and Technology Xiangtan 411201China Hunan university Changsha 410082China Indiana university BloomingtonIndiana 47405USA Inner Mongolia university Hohhot 010021China Institute of Advanced Science Facilities Shenzhen 518107China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Institute of Physics Academia SinicaTaipeiTaiwan 11529China Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China Jilin university Changch

The superτ-charm facility(STCF)is an electron–positron collider proposed by the Chinese particle physics *** is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of 0.5×10^(35) cm^(–2)·s^(–1) or *** STCF will produce a data sample about a factor of 100 larger than that of the presentτ-charm factory—the BEPCII,providing a unique platform for exploring the asymmetry of matter-antimatter(charge-parity violation),in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions,as well as searching for exotic hadrons and physics beyond the Standard *** STCF project in china is under development with an extensive R&D *** document presents the physics opportunities at the STCF,describes conceptual designs of the STCF detector system,and discusses future plans for detector R&D and physics case studies.

关键词： electron–positron collider tau-charm region high luminosity STCF detector conceptual design

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基于群组决策的寒区隧道冻害风险评价研究

铁道工程学报 2024年第3期41卷 91-99页

作者：张亚琴王道远袁金秀张业权赵斌崔光耀章浩天孙梁河北交通职业技术学院石家庄050091 河北省季冻区公路服役安全与预警技术创新中心石家庄050091 中铁十九局集团第三工程有限公司沈阳110136 北方工业大学北京100144 河北省交通规划设计研究院有限公司石家庄050299

研究目的:为客观有效评估隧道冻害程度,基于群组决策和三角模糊数法构建寒区隧道冻害风险评价模型。首先,采用更有利于专家表达的三角模糊数建立判断矩阵,利用相容度指标确定专家判断水平,从而赋予相应权重;其次,综合考虑引起寒区隧道... 详细信息

研究目的:为客观有效评估隧道冻害程度,基于群组决策和三角模糊数法构建寒区隧道冻害风险评价模型。首先,采用更有利于专家表达的三角模糊数建立判断矩阵,利用相容度指标确定专家判断水平,从而赋予相应权重;其次,综合考虑引起寒区隧道冻害的温度、水文、围岩条件和工程措施等因素,形成二级评价指标,通过三角模糊数群组决策模型确定各指标权重;再次,将二级评价指标分为10个定量指标和6个定性指标,定量指标按梯形分布建立隶属度函数,定性指标由专家按百分制打分,再按梯形分布函数确定各等级隶属度;最后,通过模糊综合评价方法计算确定隧道冻害等级,并提供相应的预防措施。研究结论:(1)选取温度、水文、围岩条件和工程措施4个一级指标、16个二级指标,设置4个冻害等级,构建了基于三角模糊数的群组决策寒区隧道冻害风险综合评价体系;(2)本文提出的冻害风险评价模型应用于杀虎口隧道,风险等级评价结果与隧道实际冻害一致,验证了模型的合理性;(3)本文模型更加客观全面,可为隧道冻害风险提供安全预警和防控建议。

关键词：寒区隧道三角模糊数群组决策冻害风险综合评价

Cemented backfilling performance of yellow phosphorus slag

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International Journal of Minerals,Metallurgy and Materials 2010年第1期17卷 121-126页

作者： Jia-sheng Chen Bin zhao Xin-min wang Qin-li zhang li wang School of Resources and Safety Engineering Central South University Changsha 410083 China Tongling Chemical Group Tongling 244100 China College of Safety Science and Engineering Liaoning Technical University Fuxin 123000 China

The experiments on the cemented backfilling perfbrmance of yellow phosphorus slag, including physical-mechanical properties, chemical compositions, optimized proportion, and cementation mechanisms, were carried out to make good use of yellow phosphorus slag as well as tackle with environment problems, safety problems, geological hazards, and high-cost issues during mining in Kaiyang Phosphorus Mine Group, Guizhou. The results show that yellow phosphorus slag can be used as the cement substitute for potential coagulation property. Quicklime, hydrated lime, and other alkaline substances can eliminate the high residual phosphorus to improve the initial strength of backfilling body. The recommended proportions （mass ratio） are 1：1 （yellow phosphorus slag：phosphorous gypsum）, 1：4：10 （Portland cement：yellow phosphorus slag：phosphorous gypsum）, and 1：4：10 （ultra fine powder：yellow phosphorus slag：phosphorous gypsum） with 5wt% of hydrated lime addition, 60wt% of solid materials, no fly ash addition, and good rheological properties. The hydration reaction involves hydration stage, solidifying stage, and strength stage with Ca（OH）2 as the activating agent. The reaction rates of yellow phosphorus slag, Portland cement, and ultrafine powder hydration with the increase of microstructure stability and initial strength.

关键词： slag phosphorous backfilling rheological properties cementation

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产叶酸菌株的筛选及产量的优化

中国食品学报 2024年第5期24卷 202-213页

作者：季亚栋李先平乔为仓王琦刘璐赵军英张春枝陈历俊大连工业大学生物工程学院辽宁大连116000 北京三元食品股份有限公司国家母婴乳品健康工程技术研究中心北京市乳品工程技术研究中心母乳研究技术创新中心北京100163 桂林理工大学国家母婴乳品健康工程技术研究中心南亚分中心广西桂林541006

本研究分别从母乳、婴儿粪便、乳制品和酸肉中筛选叶酸生产菌株,并通过培养基优化、代谢途径研究等方法提高叶酸的产量。结果表明,在39株产叶酸菌株中得到4株高产菌株,分别为鼠李糖乳杆菌B2-14(39.56 ng/mL)、双歧杆菌D020(32.56 ng/mL... 详细信息

本研究分别从母乳、婴儿粪便、乳制品和酸肉中筛选叶酸生产菌株,并通过培养基优化、代谢途径研究等方法提高叶酸的产量。结果表明,在39株产叶酸菌株中得到4株高产菌株,分别为鼠李糖乳杆菌B2-14(39.56 ng/mL)、双歧杆菌D020(32.56 ng/mL)、罗伊氏乳杆菌B1-28(60.72 ng/mL)、格式乳杆菌F020(61.22 ng/mL)。通过优化培养基条件,叶酸产量可提高50%~70%。在经过条件优化的牛乳培养基中培养,叶酸产量可提高6~10倍。其中,菌株B1-28在牛乳培养基培养后产量达910 ng/mL。分析产叶酸路径的一些指标及相关代谢基因,探究叶酸合成途径指标的变化及其机理,从而研制出有利于人群叶酸摄入的乳制品。

关键词：叶酸菌株筛选牛乳培养基优化罗伊氏乳杆菌

ZG20SiMn铸钢摇臂壳体铸造过程数值仿真及工艺优化

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材料科学与工艺 2024年第3期32卷 78-86页

作者：赵国超张一鸣王慧赵丽娟周国强辽宁工程技术大学机械工程学院辽宁阜新123000 辽宁省大型工矿装备重点实验室辽宁阜新123000

摇臂壳体是采煤机的重要组成部件,具有多级壁厚、变截面等异形特征。为提高采煤机摇臂壳体铸造质量,解决因铸造工艺不成熟导致的缩松、缩孔等缺陷问题。以MG325型采煤机摇臂壳体为研究对象,设计顶注式和底注式两种铸造工艺方案,采用ProC... 详细信息

摇臂壳体是采煤机的重要组成部件,具有多级壁厚、变截面等异形特征。为提高采煤机摇臂壳体铸造质量,解决因铸造工艺不成熟导致的缩松、缩孔等缺陷问题。以MG325型采煤机摇臂壳体为研究对象,设计顶注式和底注式两种铸造工艺方案,采用ProCAST软件探究不同浇注工艺方案下摇臂壳体铸件充型及凝固过程,分析铸件温度场、凝固场及缩松、缩孔铸造缺陷位置。基于Niyama判据和应力场分布对底注式铸造工艺方案进行优化。结果表明:优化后摇臂壳体铸件在凝固冷却过程中保持温度梯度递增,促进铸件实现顺序凝固,铸件缺陷率明显降低且充型效果更佳,缩孔体积仅占摇臂壳体体积的0.0049%,电机孔薄壁端面应力优化量为38.47%,输出端孔处应力优化量达到91.08%。本文研究成果为采煤机摇臂壳体的铸造工艺提供了理论基础和数据支撑。

关键词：采煤机摇臂壳体铸造缺陷工艺优化残余应力

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