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A novel approach for radionuclide diffusion in the enclosed environment of a marine nuclear reactor during a severe accident

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Nuclear Science and Techniques 2022年第2期33卷 53-65页

作者： Fang Zhao Shu-Liang Zou Shou-long Xu Xuan wang jun-long wang De-Wen Tang School of Resource Environment and Safety Engineering University of South ChinaHengyang 421001China Hunan Provincial Key Laboratory of Emergency Safety Technology and Equipment for Nuclear Facilities Hengyang 421001China Shanghai Nuclear Engineering Research and Design Institute Co.LTD Shanghai 200000China Science and Technology On Reactor System Design Technology Laboratory Nuclear Power Institute of ChinaChengdu 610213China

A severe accident in a marine nuclear reactor leads to radionuclide leakage,which causes hidden dangers to workers and has adverse effects of environmental *** is necessary to propose a novel approach to radionuclide diffusion in a confined environment after a severe accident in a marine nuclear ***,this study proposes a new method for the severe accident analysis program MELCOR coupled with computational fluid dynamics scSTREAM to study radioactive diffusion in severe *** radionuclide release fraction and temperature calculated by MELCOR were combined with the scSTREAM calculations to study the radionuclide diffusion behavior and the phenomenon of radionuclide diffusion in different space environments of the reactor under the conditions of varying wind velocities of the ventilation system and diffusion *** results show that the wind velocity of the ventilation system is very small or zero,and the turbulent diffusion of radionuclides is not obvious and diffuses slowly in the form of condensation sedimentation and gravity *** the wind speed of the ventilation system increases,the flow of radionuclides meets the wall and forms eddy currents,affecting the time variation of radionuclides diffusing into chamber *** wind velocity of the ventilation system and the diffusion speed has opposite effects on the time variation trend of radionuclide diffusion into the four chambers.

关键词： Radionuclide diffusion MELCOR coupled with scSTREAM Severe accident Marine nuclear reactor

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Data Bucket-Based Fragment Management for Solid State Drive Storage System

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Journal of Electronic Science and Technology 2020年第4期18卷 330-340页

作者： Wei Jiang jun-long wang Jin-Yu Zhan Jing-Huan Yu Hai-Bo Hu School of Information and Software Engineering University of Electronic Science and Technology of ChinaChengdu 610054 Computer Science Department City University of Hong KongHong Kong 999077

The current storage mechanism considered little in data’s keeping *** can produce fragments of various sizes among data *** some cases,these fragments may be serious and harm system *** this paper,we manage to modify the current storage *** introduce an extra storage unit called data bucket into the classical data manage ***,we modify the data manage mechanism to improve our *** keeping data according to their visited information,both the number of fragments and the fragment size are greatly *** different data features and storage device conditions,we also improve the solid state drive(SSD)lifetime by keeping data into different *** show that our designs have a positive influence on the SSD storage density and actual service time.

关键词： Data structure erasing time fragment solid state driver(SSD)

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A New FCC Process MIP for Production of Clean Gasoline Component

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China Petroleum Processing & Petrochemical Technology 2001年第3期3卷 43-48页

作者： Xu Youhao Zhang Jiushun long jun wang Xieqing Research Institute of Petroleum Processing Beijing 100083 Research Institute of Petroleum Processing Beijing 100083 Research Institute of Petroleum Processing Beijing 100083 Research Institute of Petroleum Processing Beijing 100083

A concept of two different reaction zones was proposed based on the FCC reaction mechanism,and verified by the experimental results of a fixed fluidized bed reactor. The concept was used to design a novel reactor with corresponding operation measures. Further experiments were conducted on the newly designed pilot scale riser reactor. In comparison with the conventional FCC at relatively equivalent conversion,the pilot test results had shown that the olefin content in the cracked naphtha dropped by 12.4%, and both of iso-paraffin and aromatics increased by 6%, and its MON increased by 1.3 units while maintaining the RON of the naphtha unchanged, and its sulfur content was reduced by 15% with a significant extension of its induction period for Shengli VGO + VR.

关键词： catalytic cracking riser reactor reaction mechanism gasoline stock olefin

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Application of distributed model predictive control based on neighborhood optimization in gauge-looper integrated system of tandem hot rolling

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Journal of Iron and Steel Research International 2023年第2期30卷 277-292页

作者： Jie Sun Fan Hou Yun-jian Hu long-jun wang Hao-yue Jin Wen Peng Xiao-jian Li Dian-hua Zhang State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang110819LiaoningChina

To solve the coupling relationship between the strip automatic gauge control and the looper control in traditional control strategy of tandem hot rolling,a distributed model predictive control(DMPC)strategy for the tandem hot rolling was explored,and a series of simulation experiments were carried ***,based on the state space analysis method,the multivariable dynamic transition process of hot strip rolling was studied,and the state space model of a gauge-looper integrated system in tandem hot rolling was ***,DMPC strategy based on neighborhood optimization was proposed,which fully considered the coupling relationship in this integrated ***,a series of experiments simulating disturbances and emergency situations were completed with actual rolling *** experimental results showed that the proposed DMPC control strategy had better performance compared with the traditional proportional-integral control and centralized model predictive control,which is applicable for the gauge-looper integrated system.

关键词： Tandem hot rolling Gauge Looper integrated system State space model Distributed model predictive control Neighborhood optimization

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NODAL secreted by male germ cells regulates the proliferation and function of human Sertoli cells from obstructive azoospermia and nonobstructive azoospermia patients

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Asian Journal of Andrology 2015年第6期17卷 996-1005,I0010-I0011页

作者： Ru-Hui Tian Shi Yang Zi-Jue Zhu jun-long wang Yun Liu Chencheng Yao Meng Ma Ying Guo Qingqing Yuan Yanan Hai Yi-Ran Huang Zuping He Zheng Li Department of Urology Institute of Andrology Ren Ji Hospital School of Medicine Shanghai Jiao Tong University Shanghai 200127 China State Key Laboratory ofOncogenes and Related Genes Renji Med X Clinical Stem Cell Research Center Ren Ji Hospital School of Medicine Shanghai Jiao Tong University Shanghai Institute ofCancer Shanghai 200127 China

This study was designed to explore the regulatory effects of male germ cell secreting factor NODAL on Sertoli cell fate decisions from obstructive azoospermia （OA） and nonobstructive azoospermia （NOA） patients. Human Sertoli cells and male germ cells were isolated using two-step enzymatic digestion and SATPUT from testes of azoospermia patients. Expression of NODAL and its multiple receptors in human Sertoli cells and male germ cells were characterized by reverse transcription-polymerase chain reaction （RT-PCRI and immunochemistry. Human recombinant NODAL and its receptor inhibitor SB431542 were employed to probe their effect on the proliferation of Sertoli cells using the CCK-8 assay. Quantitative PCR and Western blots were utilized to assess the expression of Sertoli cell functional genes and proteins. NODAL was found to be expressed in male germ cells but not in Sertoli cells, whereas its receptors ALK4, ALK7, and ACTR-IIB were detected in Sertoli cells and germ cells, suggesting that NODAL plays a regulatory role in Sertoli cells and germ cells via a paracrine and autocrine pathway, respectively. Human recombinant NODAL could promote the proliferation of human Sertoli cells. The expression of cell cycle regulators, including CYCLIN A, CYCLIN D1 and CYCLIN E, was not remarkably affected by NODAL signaling. NODAL enhanced the expression of essential growth factors, including GDNF, SCF, and BMP4, whereas SB431542 decreased their levels. There was not homogeneity of genes changes by NODAL treatment in Sertoli cells from OA and Sertoli cell-only syndrome （SCO） patients. Collectively, this study demonstrates that NODAL produced by human male germ cells regulates proliferation and numerous gene expression of Sertoli cells.

关键词： azoospermia function human Sertoli cells NODAL proliferation

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Quick determination of gas pressure before uncovering coal in cross-cuts and shafts

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Journal of China University of Mining and Technology 2008年第4期18卷 494-499页

作者： JIANG Cheng-lin wang Chen LI Xiao-wei CHEN Yu-jia XIE Qing-xue LIU Ying TANG jun YANG Fei-long wang Fa-kai DENG Su-hua ZHANG Chao-jie CHENG Song-li LV Shu-wen School of Safety Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

The determination of gas pressure before uncovering coal in cross-cuts and in shafts is one of the important steps in pre- dicting coal and gas outbursts. However, the time spent for testing gas pressure is, at present, very long, seriously affecting the ap- plication of outburst prediction techniques in opening coal seams in cross-cuts and shafts. In order to reduce the time needed in gas pressure tests and to improve the accuracy of tests, we analyzed the process of gas pressure tests and examined the effect of the length of boreholes in coal seams in tests. The result shows that 1) the shorter the borehole, the easier the real pressure value of gas can be obtained and 2) the main factors affecting the time spent in gas pressure tests are the length of the borehole in coal seams, the gas emission time after the borehole has been formed and the quality of the borehole-sealing. The longer the length of the bore- hole, the longer the gas emission time and the larger the pressure-relief circle formed around the borehole, the longer the time needed for pressure tests. By controlling the length of the borehole in a test case in the Huainan mining area, and adopting a quick sealing technique using a sticky liquid method, the sealing quality was clearly improved and the gas emission time as well as the amount of gas discharged greatly decreased. Before the method described, the time required for the gas pressure to increase during the pressure test process, was more than 10 days. With our new method the required time is only 5 hours. In addition, the accuracy of the gas pressure test is greatly improved.

关键词： gas pressure sticky liquid sealing quick test cross-cut shaft

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Study on the Formaldehyde Adsorption Kinetics of Dry Waters

Study on the Formaldehyde Adsorption Kinetics of Dry Waters

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2014中国功能材料科技与产业高层论坛

作者： jun-long wang Jie Hou Ting Jiang Yong-junHe Yao-dong Liang Department of Chemistry and Chemical Engineering Xi’an University of Science and Technology

Dry waters with an average diameter of 82μm were prepared by a high speed mixed *** formaldehyde absorption kinetics of dry waters was investigated by simulating indoor formaldehyde pollution in glass *** results showed that pseudo-second order model could be used to simulate the adsorption process;the adsorption rate was highest in the initial 60 minutes;when the adsorption lasted for180 minutes,the adsorption reached equilibrium.

关键词： Dry waters Formaldehyde Adsorption kinetics

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MoS_(2)Lubricate‑Toughened MXene/ANF Composites for Multifunctional Electromagnetic Interference Shielding

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Nano-Micro Letters 2025年第2期17卷 358-371页

作者： Jiaen wang Wei Ming longfu Chen Tianliang Song Moxi Yele Hao Zhang long Yang Gegen Sarula Benliang Liang Luting Yan Guangsheng wang School of Physical Science and Engineering Beijing Jiaotong UniversityBeijing 100044People’s Republic of China Key Laboratory of Bio‑Inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191People’s Republic of China

The design and fabrication of high toughness electromagnetic interference(EMI)shielding composite films with diminished reflection are an imperative task to solve electromagnetic pollution *** MXene/ANF(aramid nanofibers)–MoS_(2)composite films with nacre-like layered structure here are fabricated after the introduction of MoS_(2)into binary MXene/ANF composite *** introduction of MoS_(2)fulfills an impressive“kill three birds with one stone”improvement effect:lubrication toughening mechanical performance,reduction in secondary reflection pollution of electromagnetic wave,and improvement in the performance of photothermal *** the introduction of MoS_(2)into binary MXene/ANF(mass ratio of 50:50),the strain to failure and tensile strength increase from 22.1±1.7%and 105.7±6.4 MPa and to 25.8±0.7%and 167.3±9.1 MPa,*** toughness elevates from 13.0±4.1 to 26.3±0.8 MJ m^(−3)(~102.3%)*** the reflection shielding effectiveness(SE_(R))of MXene/ANF(mass ratio of 50:50)decreases~10.8%.EMI shielding effectiveness(EMI SE)elevates to 41.0 dB(8.2–12.4 GHz);After the introduction of MoS_(2)into binary MXene/ANF(mass ratio of 60:40),the strain to failure increases from 18.3±1.9%to 28.1±0.7%(~53.5%),the SE_(R)decreases~22.2%,and the corresponding EMI SE is 43.9 *** MoS_(2)also leads to a more efficient photothermal conversion performance(~45 to~55℃).Additionally,MXene/ANF–MoS_(2)composite films exhibit excellent electric heating performance,quick temperature elevation(15 s),excellent cycle stability(2,2.5,and 3 V),and long-term stability(2520 s).Combining with excellent mechanical performance with high MXene content,electric heating performance,and photothermal conversion performance,EMI shielding ternary MXene/ANF–MoS_(2)composite films could be applied in many industrial *** work broadens how to achieve a balance between mechanical properties and versatility of composites in the case of high-function fillers.

关键词： MXene-MoS_(2) Lubrication toughening EMI shielding Photothermal conversion Electric heating performance

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The complex effects of miR-146a in the pathogenesis of Alzheimer's disease

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Neural Regeneration Research 2025年第5期20卷 1309-1323页

作者： Yunfan long Jiajia Liu Yu wang Haidong Guo Guohong Cui Department of Neurology Shanghai No.9 People’s HospitalShanghai Jiaotong University School of MedicineShanghaiChina Academy of Integrative Medicine Shanghai University of Traditional Chinese MedicineShanghaiChina School of Integrative Medicine Shanghai University of Traditional Chinese MedicineShanghaiChina Department of Neurology Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghaiChina

Alzheimer's disease is a neurodegenerative disorder characterized by cognitive dysfunction and behavioral *** plaques formed through the extracellular deposition of amyloid-βproteins,as well as neurofibrillary tangles formed by the intracellular deposition of hyperphosphorylated tau proteins,comprise two typical pathological features of Alzheimer's *** symptomatic treatment,there are no effective therapies for delaying Alzheimer's disease ***(miR)are small,non-coding RNAs that negatively regulate gene expression at the transcriptional and translational levels and play important roles in multiple physiological and pathological ***,miR-146a,a NF-κB-regulated gene,has been extensively implicated in the development of Alzheimer's disease through several *** has demonstrated substantial dysregulation of miR-146a both during the initial phases and throughout the progression of this *** R-146a is believed to reduce amyloid-βdeposition and tau protein hyperphosphorylation through the TLR/IRAK1/TRAF6 pathway;however,there is also evidence supporting that it can promote these processes through many other pathways,thus exacerbating the pathological manifestations of Alzheimer's *** has been widely reported that miR-146a mediates synaptic dysfunction,mitochondrial dysfunction,and neuronal death by targeting m RNAs encoding synapticrelated proteins,mitochondrial-related proteins,and membrane proteins,as well as other *** the impact on glial cells,miR-146a also exhibits differential *** one hand,it causes widespread and sustained inflammation through certain pathways,while on the other hand,it can reverse the polarization of astrocytes and microglia,alleviate neuroinflammation,and promote oligodendrocyte progenitor cell differentiation,thus maintaining the normal function of the myelin sheath and exerting a protective effect on *** this review,we provide a

关键词： Alzheimer's disease amyloid-β glial cells microRNAs miR-146a neuroinflammatory

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The Correlation Research between anti-sperm antibodies and Male suffering from chronic reproductive system inflammation in infertile couples

The Correlation Research between anti-sperm antibodies and M...

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中华医学会生殖医学分会人类精子库管理学组第三届年会全国男性生殖医学和精子库管理新进展第四次研讨会

作者： jun-long wang Yu-qin Zhang jun Pei Zhen-hua Fu Shun-tian Guo Fu-jin Mai Guo-Zhi Zeng Fang-Yuan Tang Male Department Shunde Maternal and Child Health Hospital Department Shunde longJang Hospital Chemical Examination Department GuangDong Maternal and Child Health Hospital

Aim:To explore the man’s sperm road suffering from chronic inflammation of reproductive system in infertile couples with anti-sperm antibodies(AsAb) ***:A controlled study,routine urine,prostate fluid routine,semen analysis,full-color ultrasound and other tests were done in all the patients,the reproductive system,of which there are sperm selection and sperm in semen white blood cell count "10 / HP,or have pus cell groups,or accompanied by a clear orchitis,epididymitis,Vesiculitis,prostatitis and other reproductive system sperm airway inflammation of chronic inflammatory group of patients who selected 86 cases;of these,select the semen contains sperm and semen WBC 10 / HP,Full-color ultrasonography in the reproductive system and reproductive system no abnormal changes in sperm duct inflammation of chronic intensive control group patients were selected for 72 *** the same time are used to couple the two sides ELISA of serum anti-sperm antibodies,the man’s sperm-coated antibodies,the woman’s cervical mucus anti-sperm antibodies *** determination of AsAb>75ng/ml shouldl be deemed as AsAb ***:According to the inflammation group and non-inflammatory group,respectively,two groups of patients and their spouses serum AsAb carried out comparative analysis of the results of 86 cases in the inflammatory group,49 cases of a husband AsAb positive,accounting for 57%;wife of 47 patients with positive AsAb,accounting for 55%.Control group,72 cases,the husband AsAb positive in 15 cases,accounting for 21%;His wife AsAb positive in 16 cases,accounting for 22%.After statistical analysis P <***:First,the male reproductive system sperm Road,inflammation is an important AsAb produced one of the reasons the mechanism was mainly due to the presence of inflammatory lesions caused by immune barrier damage,sperm antigen exposure and, ultimately,appears in seminal plasma or serum antibody-associated *** diagnosis of immune infertili

关键词： chronic inflammation reproductive system anti-sperm antibodies

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