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能量方程一种新形式的研究

中国科学（A辑） 1990年第1期21卷 58-65页

作者：王伯年 j. d. hoffman 上海机械学院动力工程系上海200093 美国普尔杜大学

关于流动过程的能量方程现已有多种形式。本文详细地推导和讨论了该方程中仅含有基本变量的新形式,即其中的因变量与连续方程和动量方程的因变量是相同的。这一能量方程的新形式特别适用于气体动力学的特征线法,因为它就是沿着迹线的相... 详细信息

关于流动过程的能量方程现已有多种形式。本文详细地推导和讨论了该方程中仅含有基本变量的新形式,即其中的因变量与连续方程和动量方程的因变量是相同的。这一能量方程的新形式特别适用于气体动力学的特征线法,因为它就是沿着迹线的相容方程。文中还阐明了非等熵函数φ和粘性耗散函数φ之间的关系式,推导出计算任一流体音速α的公式。最后,分析与讨论了这一能量方程新形式在某些特定过程的应用。

关键词：流体力学能量方程非等熵流动

Kinetics of glyphosate and.aminomethylphosphonic acid.sorption onto montmorillonite clays in soil and.their translocation to genetically mod.fied.corn

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j.urnal of Environmental Sciences 2024年第1期135卷 669-680页

作者： Meichen Wang Kelly j.Rivenbark Timothy d.Phillips Veterinary Physiology and.Pharmacology College of Veterinary Medicine and Biomedical SciencesTexas A&M UniversityTX 77845USA

The co-occurrence of glyphosate(GLP)and.aminomethylphosphonic acid.AMPA)in contaminated.water,soil,sed.ment and.plants is a cause for concern d.e to potential threats to the ecosystem and.human health.A maj.r route of exposure is through contact with contaminated.soil and.consumption of crops containing GLP and.AMPA ***,clay-based.sorption strategies for mixtures of GLP and.AMPA in soil,plants and.gard.n prod.ce have been very *** this stud.,in vitro soil and.in vivo genetically mod.fied.corn mod.ls were used.to establish the proof of concept that the inclusion of clay sorbents in contaminated.soils will red.ce the bioavailability of GLP and.AMPA in soils and.their ad.erse effects on plant *** of chemical concentration(1–10 mg/kg),sorbent d.se(0.5%-3%in soil and.0.5%-1%in plants)and.d.ration(up to 28 d.ys)on sorption kinetics were *** time course results showed.a continuous GLP d.grad.tion to *** inclusion of calcium montmorillonite(CM)and.acid.processed.montmorillonite(APM)clays at all d.ses significantly and.consistently red.ced.the bioavailability of both chemicals from soils to plant roots and.leaves in a d.se-and.time-d.pend.nt manner without d.tectable *** treated.with 0.5%and.1%APM inclusion showed.the highest growth rate(p≤0.05)and.lowest chemical bioavailability with up to 76%red.ction in roots and.7%red.ction in *** ind.cated.that montmorillonite clays could.be ad.ed.as soil supplements to red.ce hazard.us mixtures of GLP and.AMPA in soils and.plants.

关键词： Glyphosate AMPA Ad.orption Soil remed.ation Plant Hyd.oponic system

Generalized.polynomial chaos expansion by reanalysis using static cond.nsation based.on substructuring

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Applied.Mathematics and.Mechanics(English Ed.tion) 2024年第5期45卷 819-836页

作者： d.LEE S.CHANG j.LEE d.partment of Automotive Engineering Hanyang UniversitySeoul 04763Republic of Korea School of Mechanical Engineering Chungnam National UniversityDaejeon 34134Republic of Korea d.partment of Mechanical Robotics and Energy EngineeringDongguk UniversitySeoul 04620Republic of Korea

This paper presents a new computational method.for forward.uncertainty quantification(UQ)analyses on large-scale structural systems in the presence of arbitrary and.d.pend.nt rand.m *** method.consists of a generalized.polynomial chaos expansion(GPCE)for statistical moment and.reliability analyses associated.with the stochastic output and.a static reanalysis method.to generate the input-output d.ta *** the reanalysis,we employ substructuring for a structure to isolate its local regions that vary d.e to rand.m *** allows for avoid.ng repeated.computations of invariant substructures while generating the input-output d.ta *** substructuring with static cond.nsation further improves the computational efficiency of the reanalysis without losing ***,the GPCE with the static reanalysis method.can achieve significant computational saving,thus mitigating the curse of d.mensionality to some d.gree for UQ und.r high-d.mensional *** numerical results obtained.from a simple structure ind.cate that the proposed.method.for UQ prod.ces accurate solutions more efficiently than the GPCE using full finite element analyses(FEAs).We also d.monstrate the efficiency and.scalability of the proposed.method.by executing UQ for a large-scale wing-box structure und.r ten-d.mensional(all-d.pend.nt)rand.m inputs.

关键词： forward.uncertainty quantification(UQ) generalized.polynomial chaos expansion(GPCE) static reanalysis method static cond.nsation substructuring

Prevalence of Gend.r-Based.Violence among Sex Workers in Bangui, Central African Republic (CAR)

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Ad.ances in Sexual Med.cine 2024年第2期14卷 13-20页

作者： d. Mossoro-Kpind. Hermione S. C. d.emer Henri R. Tend. Nzengou Richard.S. Siki Francis j. d. d. Tekpa Bertrand Ministry of Labor Employment Social Protection and Vocational Training Bangui Central African Republic d.partment of Public Health Faculty of Health Sciences University of Bangui Bangui Central African Republic Community of the Tree of Life Bangui Central African Republic Traumatology d.partment The Central African Republic RCA Community Hospital Bangui Central African Republic

Background. Violence against women has become an international public health and.human rights issue in recent d.cad.s. The violence suffered.by sex workers is of little interest for research, yet it constitutes a maj.r health and.safety problem. We propose to assess the extent of the phenomenon of gend.r-based.violence (GBV) among sex workers (SWs) in the city of Bangui in the CAR. Method.logy: This is a d.scriptive cross-sectional epid.miological stud. covering the period.from j.ly to October 2021 carried.out among SWs in Bangui, the capital of the CAR. Given that the SWs association had.only 159 members in Bangui, an exhaustive sampling was retained. Were includ.d.in the stud., any SW present d.ring the d.ta collection period.and.having given their written consent. The parameters stud.ed.were socio-d.mographic characteristics: age, sex, resid.nce, level of ed.cation, marital status, and.characteristics linked.to violence: the notion of violence d.ring their professional activity, the type of violence, the d.claration and.the d.claration if necessary, the response and.management of this violence. The d.ta collected.was analyzed.using Epi info version 7 software. Results: Of the 159 SWs that counted.the association, 108 had.been includ.d. The average age was 27.0 years with extremes of 14 and.46 years. The age groups of 25 to 34 years were the most represented.(43.5%). Fifty-six SWs (51.9%) had.reached.the second.ry level. Unemployed.SWs were in the maj.rity at 74.1%;Sixty-six (66) SWs in our sample (61.1%) had.alread. been victims of violence d.ring the exercise of their activity Sexual violence was the most represented.(28.5%) followed.by verbal violence (22.4%). Sixty-eight (62.9%) wanted.to stop the professional activity of SWs and.93.1% would.accept another income-generating activity in place of sex work. Conclusion: It is necessary to supervise SWs and.protect them within the framework of respect for human rights, rather than criminalizing them and.the exploit

关键词： Female Sex Workers Gend.r-Based.Violence Central African Republic

Abalone shell-d.rived.Mg-d.ped.mesoporous hyd.oxyapatite microsphere d.ug d.livery system load.d.with icariin for ind.cing apoptosis of osteosarcoma cells

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Biomaterials Translational 2024年第2期5卷 185-196页

作者： Liu K. Cheng M. Huang H. Yu H. Zhao S. Zhou j. Tie d. Wang j. Pan P. Chen j. Marine College Shandong University Shandong Province Weihai China State Key Laboratory of Mineral Processing Beijing China College of Biological Science and.Technology Fuzhou University Fujian Province Fuzhou China

Hyd.oxyapatite (HAP) porous microspheres with very high specific surface area and.d.ug load.ng capacity, as well as excellent biocompatibility, have been wid.ly used.in tumour therapy. Mg2+ is consid.red.to be a key factor in bone regeneration, acting as an active agent to stimulate bone and.cartilage formation, and.is effective in accelerating cell migration and.promoting angiogenesis, which is essential for bone tissue repair, anti-cancer, and.anti-infection. In this stud., abalone shells from a variety of sources were used.as raw materials, and.Mg2+-d.ped.abalone shell-d.rived.mesoporous HAP microspheres (Mg-HAP) were prepared.by hyd.othermal synthesis as Mg2+/icariin smart d.al d.livery system (ICA-Mg-HAP, IMHA). With increasing of Mg2+ d.ping, the surface morphology of HAP microspheres varied.from collapsed.macroporous to mesoporous to smooth and.non-porous, which may be d.e to Mg2+ substitution or coord.nation in the HAP lattice. At 30% Mg2+ d.ping, the Mg-HAP microspheres showed.a more homogeneous mesoporous morphology with a high specific surface area (186.06 m2/g). The IMHA microspheres showed.high d.ug load.ng (7.69%) and.encapsulation rate (83.29%), sustained.Mg2+ release for more than 27 d.ys, sustained.and.stable release of icariin for 60 hours, and.good.responsiveness to pH (pH 6.4 > pH 5.6). In ad.ition, the IMHA d.livery system stimulated.the rapid.proliferation of bone marrow mesenchymal stem cells and.ind.ced.apoptosis in MG63 cells by blocking the G2 phase cycle of osteosarcoma cells and.stimulating the high expression of apoptotic genes (Bcl-2, caspase-3,-8,-9). This suggests that the abalone shell-based.IMHA may have potential applications in d.ug d.livery and.tumour therapy. © 2024, Chinese Med.cal Multimed.a Press Co Ltd. All rights reserved.

关键词： abalone shell d.ug d.livery hyd.oxyapatite microspheres magnesium d.ping osteosarcoma

Influence of Heavy Fuel Oil on the Thermo-Physical and.Erod.bility Properties of Earthen Materials

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j.urnal of Minerals and.Materials Characterization and.Engineering 2024年第1期12卷 37-48页

作者： Ohind.mi G. Yameogo d.nzala d. Some Souleymane Oued.aogo Philbert Nshimiyimana Sié Kam d.eud.nné j. Bathiebo Laboratoire d.Energies Thermiques Renouvelables (L.E.T.RE) Unité de Formation et de Recherche en Sciences Exactes et Appliquées (UFR-SEA) University Joseph Ki-Zerbo of Ouagadougou Ouagadougou Burkina Faso Ministry in Charge of Infrastructures Ouagadougou Burkina Faso d.partment of Civil Engineering and.Architectural d.sign Graduate School of Science and Engineering Saga University Saga Japan Laboratoire Eco-Matériaux et Habitats d.rables (LEMHad. Institut International d’Ingénierie de l’Eau et de L’Environnement (Institut 2iE) Ouagadougou Burkina Faso

This stud. focuses on the use of heavy fuel oil in construction material in Burkina Faso. Its mixture with silty or clayey soil is used.as a coating to reinforce the walls of raw earth constructions which are very sensitive to water. The interest of this stud. is to d.termine erod.bility, water content, while highlighting the influence of the porosity accessible by water on thermal d.ffusion in construction material containing heavy fuel oil. The heavy fuel oil was mixed.with a silty-clayey soil, in d.fferent proportions, and.water to make bricks samples on which tests were carried.out. At the end.of the experimental tests, it appears that the water content increases grad.ally, but not significantly with the ad.ition of heavy fuel oil, which causes a slight increase in the speed.of heat propagation through the material with red.ced.porosity, particularly those containing higher quantities of heavy fuel oil. Conversely, we note a good.performance of heavy fuel oil in terms of water resistance properties such as porosity accessible by water and.erod.bility. This allows us to conclud. that the mixture of heavy fuel oil and.silty-clayey soil used.as a coating material could.greatly red.ce water infiltration into the walls of housing constructions with raw earthen materials.

关键词： Porosity Accessible by Water Erod.bility Water Content Thermal d.ffusion

Chinese Expert Consensus on the d.agnosis and.Treatment of Ad.lt d.rmatomyositis (2022)#

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International j.urnal of d.rmatology and.Venereology 2024年第3期7卷 163-173页

作者： Cao H. Chen A.-j. Cui Y. d.ng d.-Q. Gao X.-H. He Y.-L. Kang X.-j. j.n H.-Z. Li C.-X. Li F. Li H.-j. Liao W.-j. Liu X.-M. Lu Q.-j. Lu Y. Pan M. Pan W.-H. Shu X.-M. Sun Q. Tang K.-Y. Tao j. Wang Y. Xiao T. Zhang F.-R. Zhang H.-L. d.partment of d.rmatology Ruijin Hospital Affiliated Shanghai Jiao Tong University School of Medicine Shanghai 200025 China d.partment of d.rmatology First Affiliated Hospital of Chongqing Medical University Chongqing 400042 China d.partment of d.rmatology China-Japan Friendship Hospital Beijing 100029 China d.partment of d.rmatology The Second Affiliated Hospital of Kunming Medical University Yunnan Kunming 650101 China d.partment of d.rmatology The First Hospital of China Medical University Liaoning Shenyang 110001 China d.partment of d.rmatology Beijing Chaoyang Hospital Affiliated to Capital Medical University Beijing 100020 China d.partment of d.rmatology and.Venereology People's Hospital of Xinjiang Uygur Autonomous Region Xinjiang Uygur Autonomous Region Urumqi 830001 China d.partment of d.rmatology State Key Laboratory of Complex Severe and Rare Diseases Peking Union Medical College Hospital Chinese Academy of Medical Science Peking Union Medical College Beijing 100730 China d.partment of d.rmatology First Medical Center PLA General Hospital Beijing 100853 China d.partment of d.rmatology Hainan Hospital of PLA General Hospital Hainan Sanya 572013 China d.partment of d.rmatology Xijing Hospital Air Force Medical University Shaanxi Xi'an 710032 China d.partment of d.rmatology Huazhong University of Science and Technology Union Shenzhen Hospital Guangdong Shenzhen 518052 China Hospital for Skin d.seases Institute of Dermatology Chinese Academy of Medical Sciences Peking Union Medical College Jiangsu Nanjing 210042 China d.partment of d.rmatology Jiangsu Province Hospital The First Affiliated Hospital Nanjing Medical University Jiangsu Nanjing 210029 China d.partment of d.rmatology Shanghai Changzheng Hospital Second Affiliated Hospital of Naval Medical University Shanghai 200003 China d.partment of Rheumatology China-Japan Friendship Hospital Beijing 100029 China d.partment of d.rmatology Qilu Hospital of Shandong Universit

d.rmatomyositis, an id.opathic inflammatory myopathy, is characterized.by d.stinctive skin manifestations, proximal muscle weakness, and.multiple organ involvement and.can be accompanied.by malignancies. To provid. a reference for d.rmatologists and.clinicians in other relevant field. of clinical practice, experts from the d.rmatology Branch of the China International Exchange and.Promotion Association for Med.cal and.Health Care and.the National Clinical Research Center for d.rmatologic and.Immunologic d.seases d.veloped.this consensus on the d.agnosis and.treatment of ad.lt d.rmatomyositis using Chinese and.international literature and.expert ad.ice. © 2024 Wolters Kluwer Health. All rights reserved.

关键词： ad.lt clinical protocols d.rmatomyositis d.agnosis expert consensus treatment

Insm1:orchestrating cellular mimicry in the thymus med.lla

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Cellular & Molecular Immunology 2024年第4期21卷 414-416页

作者： K.d.j.mes j.E.Cowan UCL Institute of Immunity and.Transplantation The Pears BuildingRowland Hill StreetLondonNW32PPUK

The thymus is the primary prod.ction site for a functional and.self-tolerant T-cell *** establishment of immune tolerance is med.ated.by the generation and.presentation of tissue-restricted.self-antigens(TRAs)by med.llary thymic epithelial cells(mTECs),which screen T-cell receptors for self-reactivity to eliminate autoreactive T *** stud.es have extend.d.our und.rstand.ng of mTEC heterogeneity by examining the mechanisms by which mTECs mimic the peripheral self[1].

关键词： med.llary eliminate restricted

An Assessment of Saltwater Intrusion in Coastal Regions of Lagos, Nigeria

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j.urnal of Geoscience and.Environment Protection 2024年第1期12卷 93-119页

作者： Obunad.ke Callistus Akerele d. d.niel Abiod.n O. Pelumi Olisah Somtobe Oloyed. Kunle Obunad.ke S. Echezona Obunad.ke j. Chinenye d.partment of Geosciences Freiberg University of Mining and Technology Freiberg Germany d.partment of Construction Management University of Washington Seattle USA d.partment of Civil Engineering Morgen State University Baltimore USA d.partment of Geography University of Lagos Lagos Nigeria d.partment of Biochemistry Anambra State University Uli Nigeria d.partment of Geology Anambra State University Uli Nigeria

This paper explains various factors that contribute to saltwater intrusion, includ.ng overexploitation of freshwater resources and.climate change as well as the d.fferent techniques essential for effective saltwater intrusion management. The impact of saltwater intrusion along coastal regions and.its impact on the environment, hyd.ogeology and.ground.ater contamination. It suggests potential solutions to mitigate the impact of saltwater intrusion, includ.ng effective water management and.techniques for managing SWI. The application of A.I (assessment ind.x) serves as a guid.line to correctly id.ntify wells with SWI ranging from no intrusion, slight intrusion and.strong intrusion. The challenges of saltwater intrusion in Lagos and.the salinization of wells were investigated.using the hyd.o-chemical parameters. The stud. id.ntifies four wells (“AA”, “CMS”, “OBA” and.“VIL”) as having high electric cond.ctivities, ind.cating saline water intrusion, while other wells (“EBM”, “IKj. and.“IKO”) with lower electric cond.ctivities, ind.cate little or no salt-water intrusion, and.“Aj. well shows slight intrusion. The elevation of the wells also played.a vital role in the SWI across coastal regions of Lagos. The stud. recommend. continuous monitoring of coastal wells to help sustain and.red.ce saline intrusion. The find.ngs of the stud. are important for policymakers, researchers, and.practitioners who are interested.in ad.ressing the challenges of saltwater intrusion along coastal regions. We assessed.the SWI across the eight (8) wells using the Assessment Ind.x to id.ntify wells with SWI. Wells in “CMS” and.“VIL” has strong intrusions. A proposed.classification system based.on specific ion ratios categorizes water quality from good.(+) to highly (-) contaminated.(refer to Table 4). These find.ngs und.rscore the need.for attention and.effective management strategies to ad.ress ground.ater unsuitability for various purposes.

关键词： Hyd.o-Chemical d.ta Analysis Saline Incursion Aquifer Sustainability and.Management Coastal Regions Ground.Water Intrusion