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通讯和计算机（中英文版） 2017年第2期14卷 73-83页

作者： norikatsu fujita Hiroshi Takeshita Sho Aoki Hirotada Fukae Kazushige Matsumoto Tomohiro Murakami Minoru Hoshino Ability Development Dept. Polytechnic University of Japan

Spray,droplet evaporation,combustion,and emission characteristics of future transport fuels for compression-ignition engines:A review

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Journal of Traffic and Transportation Engineering(English Edition) 2024年第4期11卷 575-613页

作者： Leang So Khuong Nozomu Hashimoto Osamu fujita Division of Mechanical and Aerospace Engineering Faculty of Engineering Hokkaido University Faculty of Automotive Engineering National Polytechnic Institute of Cambodia

This review examines the potential of hydrogen, ammonia, and biodiesel as alternative fuels,focusing on spray dynamics, droplet evaporation, combustion, and emissions. Hydrogen offers superior combustion characteristics but faces challenges in NOxemissions. Strategies like nonpremixed direct injection, increased intake boost pressure, and low-pressure EGR are suggested for robust hydrogen combustion in compression-ignition engines. Control of hydrogen start of injection（SOI） and water injection（WI） are identified as effective techniques for reducing NOxemissions. Ammonia shows inferior combustion and higher NOxand unburned NH3emissions in the same conditions as conventional fuels with conventional engines. Understanding ammonia spray and evaporation conditions is significant for optimizing an ammonia-air mixture and minimizing wall impingement and ammonia trap in the crevice,thereby improving combustion and emission reduction. Increasing intake pressure, injection pressure, and EGR rate, employing a turbulent jet, and preheating ammonia improve efficiency and reduce NOxemissions. Utilizing ammonia combustion requires the implementation of after-treatment systems such as NH3adsorber and De NOxcatalysts to mitigate unburned NH3and NOxemissions. Biodiesel affects the fuel supply system, combustion, and emission characteristics according to its viscosity and density. Increasing injection pressure and blending with volatile fuels enhance spray and combustion. Optimum biodiesel preheating temperatures for the injection pump and injector are crucial for achieving the best pump capacity and spray formation. By utilizing biodiesel-PODE blends and investigating low-temperature biodiesel combustions, there is potential to improve thermal efficiency and PMNOxtrade-off. Therefore, carbon-neutral fuel adoption should be accelerated to mitigate CO2emissions, highlighting the importance of combustion techniques and emissions reduction strategies.

关键词： Carbon-neutral fuels Spray formation Droplet evaporation Injection strategies Combustion efficiency Emission reduction

Moving doubly heavy baryon in a strongly coupled plasma via holography

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Chinese Physics C 2024年第8期48卷 42-55页

作者： Xuan Liu Jia-Jie Jiang Xun Chen Mitsutoshi fujita Akira Watanabe School of Nuclear Science and Technology University of South ChinaHengyang 421001China School of Mathematics and Physics University of South ChinaHengyang 421001China

Gauge/gravity duality is used to study the properties of the doubly heavy baryon(QQq)at finite rapidity and temperature in heavy-ion *** investigate the impact of rapidity on string breaking and screening of QQq and compare these effects with the results for QQ¯in *** reveal that the string-breaking distances of QQq and QQ¯are close in the confined state,and the effects of rapidity and temperature on the string breaking are not *** interesting result shows that QQq cannot be determined at sufficiently high temperatures and ***,QQ¯can exist under any conditions as long as the separation distance is sufficiently ***,the screening distances of QQq and QQ¯are compared at finite rapidity and *** on the above analysis,we infer that QQ¯is more stable than QQq at finite rapidity and temperature.

关键词： holographic QCD QGP heavy quark

A functionalized activated carbon adsorbent prepared from waste amidoxime resin by modifying with H_(3)PO_(4) and ZnCl_(2) and its excellent Cr(Ⅵ)adsorption

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International Journal of Minerals,Metallurgy and Materials 2024年第3期31卷 585-598页

作者： Chunlin He Yun Liu Mingwei Qi Zunzhang Liu Yuezhou Wei Toyohisa fujita Guifang Wang Shaojian Ma Wenchao Yang School of Resources Environment and MaterialsGuangxi UniversityNanning 530004China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Guangxi UniversityNanning 530004China School of Nuclear Science and Technology University of South ChinaHengyang 421000China School of Nuclear Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of New Low-carbon Green Chemical Technology Education Department of Guangxi Zhuang Autonomous RegionNanning 530004China

With the application of resins in various fields, numerous waste resins that are difficult to treat have been produced. The industrial wastewater containing Cr(Ⅵ) has severely polluted soil and groundwater environments, thereby endangering human health. Therefore, in this paper, a novel functionalized mesoporous adsorbent PPR-Z was synthesized from waste amidoxime resin for adsorbing Cr(Ⅵ). The waste amidoxime resin was first modified with H3PO4 and ZnCl_(2), and subsequently, it was carbonized through slow thermal decomposition. The static adsorption of PPR-Z conforms to the pseudo-second-order kinetic model and Langmuir isotherm, indicating that the Cr(Ⅵ) adsorption by PPR-Z is mostly chemical adsorption and exhibits single-layer adsorption. The saturated adsorption capacity of the adsorbent for Cr(Ⅵ) could reach 255.86 mg/g. The adsorbent could effectively reduce Cr(Ⅵ) to Cr(Ⅲ) and decrease the toxicity of Cr(Ⅵ) during adsorption. PPR-Z exhibited Cr(Ⅵ) selectivity in electroplating wastewater. The main mechanisms involved in the Cr(Ⅵ) adsorption are the chemical reduction of Cr(Ⅵ) into Cr(Ⅲ) and electrostatic and coordination interactions. Preparation of PPR-Z not only solves the problem of waste resin treatment but also effectively controls Cr(Ⅵ) pollution and realizes the concept of “treating waste with waste”.

关键词： waste amidoxime resin mesoporous adsorbent H_(3)PO_(4)and ZnCl_(2)processing Cr(VI)adsorption electroplating wastewater

Solvent extraction of scandium from leaching solution of red mud roasted with ammonium sulfate using D2EHPA/TBP

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Journal of Rare Earths 2024年第10期42卷 1943-1949页

作者： Fucheng Li Xinsheng Li Lei Shi Xiang Li Duoqiang Liang Yuezhou Wei Toyohisa fujita School of Resources Environment and MaterialsGuangxi University State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Guangxi University School of Nuclear Science and Technology University of South China

Red mud is an important secondary resource for scandium *** red mud leaching solution containing scandium in this study was derived from environmentally friendly ammonium sulfate roasting and water leaching process.A synergistic extraction with a mixture of di（2-ethylhexyl） phosphate acid（D2EHPA） and tributyl phosphate（TBP） for recovery of scandium from red mud leaching solution is *** effects of D2EHPA concentration,H2SO4concentration,rare earth elements,dosage of TBP,phase ratio（A/O）,contact time and H2O2concentration on scandium extraction were *** results show that more than 99% scandium is extracted under the optimal conditions while Fe,Al,Ti,Ca and rare earth elements（Ce,Y,La,Nd,Er,etc.） are hardly *** stripping efficiency of Sc reaches above 92.37% under the optimal stripping conditions of 5 mol/L NaOH with an A/O of 1 at 90℃ for 30 *** proposed technology could provide an effective method for extraction of scandium from red mud leaching solution.

关键词： Scandium Red mud leaching solution D2EHPA/TBP Solvent extraction Rare earths

Bi_(2)O_(3)/g-C_(3)N_(4)hollow core–shell Z-scheme heterojunction for photocatalytic uranium extraction

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Nano Research 2024年第7期17卷 5845-5855页

作者： Hao Fu Yuehua Pan Zhenyu Cai Yuxiang Deng Minchen Hou Yuezhou Wei Toyohisa fujita Shunyan Ning Youbin Wang Shaolong Zhang Xinpeng Wang School of Chemistry&Chemical Engineering Guangxi UniversityNanning 530004China School of Resources Environment and MaterialsGuangxi UniversityState Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite StructuresNanning 530004China College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China School of Materials Sun Yat-sen UniversityShenzhen 518107China School of Nuclear Science and Technology University of South ChinaHengyang 421001China

Photocatalytic uranium extraction from radioactive nuclear wastewater and seawater is critical for promoting the sustainable advancement of nuclear industry,but the complexity of real-world environments,particularly the occurrence of anoxic and oxygen-enriched states,presents significant challenges to effective uranium ***,a layered hollow core–shell structure of Bi_(2)O_(3)/g-C_(3)N_(4)Z-scheme heterojunction photocatalyst has been designed and successfully applied for photocatalytic uranium extraction in both aerobic and oxygen-free conditions,and the extraction efficiency of uranium can reach 98.4%and 99.0%,***,the photocatalyst still has ultra-high extraction efficiency under the influence of pH,inorganic ions,and other *** exceptional capability for uranium extraction is on the one hand due to the distinctive hollow core–shell architecture,which furnishes an abundant quantity of active *** the other hand,benefiting from the suitable band gap structure brought by the construction of Z-scheme heterojunction,Bi_(2)O_(3)/g-C_(3)N_(4)exhibits current densities(1.00μA/cm^(2))that are 5.26 and 3.85 times greater than Bi_(2)O_(3)and g-C_(3)N_(4),respectively,and the directional migration mode of Z-scheme carriers significantly prolongs the lifetime of photogenerated charges(1.53 ns),which separately surpass the pure samples by factors of 5.10 and ***,the reaction mechanism and reaction process of photocatalytic uranium extraction are investigated in the presence and absence of oxygen,respectively.

关键词： Bi_(2)O_(3)/g-C_(3)N_(4) Z-scheme photocatalytic uranium extraction

Initial experience with robot-assisted adrenalectomy for giant adrenal tumors

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Asian Journal of Urology 2024年第3期11卷 507-508页

作者： Takayuki Ohzeki Hiroyuki Kita Remon Kunishige Taiji Hayashi Tsukasa Nishioka Koichi Sugimoto Takafumi Minami Kazutoshi fujita Department of Urology Izumi City General Hospital4-5-1 WakechoIzumiOsaka 594-0073Japan Department of Urology Kaizuka City Hospital10-20 Hori 3-chomeKaizukaOsaka 594-0073Japan Department of Urology Kindai University Faculty of Medicine377-2 Ohno-HigashiOsaka-SayamaOsaka 589-8511Japan

Dear Editor,Adrenocortical carcinomas and adrenal cysts,including pseudocysts,are uncommon tumors[1,2].No consistent approach to surgery for large adrenal tumors including cysts,has been established,and especially when malignancy is suspected,consideration is still given to the option of *** robot-assisted surgery,we successfully performed the resection of a giant adrenal pseudocyst and a giant adrenocortical carcinoma,as reported previously[3],underlining the advantages of robot-assisted surgery for large adrenal tumors.

关键词： adrenal tumors surgery

EFFECTIVE AUTOMATED NEGOTIATION BASED ON ISSUE DENDROGRAMS AND PARTIAL AGREEMENTS

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Journal of Systems Science and Systems Engineering 2018年第2期27卷 201-214页

作者： ShinjiKakimoto Katsuhide fujita Institute of Engineering Tokyo University of Agriculture and Technology

Negotiation is both an important topic in multi-agent systems research and an important aspect of daily life. Many real-world negotiations are complex and involve multiple interdependent issues, therefore, there has been increasing interest in such negotiations. Existing nonlinear automated negotiation protocols have difficulty in finding solutions when the number of issues and agents is large. In automated negotiations covering multiple independent issues, it is useful to separate out the issues and reach separate agreements on each in turn. In this paper, we propose an effective approach to automated negotiations based on recursive partitioning using an issue dendrogram. A mediator first finds partial agreements in each sub-space based on bids from the agents, then combines them to produce the final agreement. When it cannot find a solution, our proposed method recursively decomposes the negotiation sub-problems using an issue dendrogram. In addition, it can improve the quality of agreements by considering previously-found partial consensuses. We also demonstrate experimentally that our protocol generates higher-optimality outcomes with greater scalability than previous methods.

关键词： Multi-issue negotiation issue dendrogram partial agreement

Analyzing Disaster Mitigation Policies in Japan and China from an Eco-DRR Perspective:A Comparative Study of Shanghai and Tokyo

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Journal of Architectural Research and Development 2024年第1期8卷 14-19页

作者： Minghui Tang Naoko fujita Art and Design University of TsukubaTsukuba 3058577IbarakiJapan

Global climate change-induced natural disasters require international efforts and the adoption of Eco-Disaster Risk Reduction(Eco-DRR)policies for sustainable *** study examines the status of Eco-DRR in disaster prevention policies through word cloud analysis,providing insights for policymakers to enhance disaster prevention amid increasing climate-related *** and Japan prioritize soft aspects,while Shanghai and China emphasize engineering for flood prevention,revealing a gap in Eco-DRR *** these differing approaches,the shared focus on water-related disasters indicates a shift towards urban *** research should assess policy effectiveness and the impact of Eco-DRR on disaster risk reduction and ecosystem protection.

关键词： Disaster Policy Eco-DRR Word-cloud

EFFECT OF W ON MECHANICAL PROPERTIES OF 12%Cr HEAT-RESISTANT STEEL

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Acta Metallurgica Sinica(English Letters) 1992年第2期5卷 95-100页

作者： fujita Toshio The University of Tokyo TokyoJapan

The effect of W on mechanical properties of 12% Cr-W-V-Nb heat resistant steel at high temperatures and room temperature is *** experimental results indicated that if the W content was about 2.2—3.0 wt-%,there was no obviously change of *** strength, but impact toughness decreased with the rise of W *** the other hand,the increase of W content enhanced the short time stress rupture strength,but did not for the long time one. The increase of W have two effects on the precipitation behavior,promoting Laves formation of type Fe_2W,increasing the precipitated phase amount and speeding up the coarsening pro- cess of precipitated phase at high *** effect of W on the mechanical properties is closely associated with precipitation *** the rupture life is short,there has no enough time to coarsen the precipitated phases,so the increase of precipitated phases results in strengthening effect,*** W increases the high temperature *** prolonged expo- sure,the evident coarsening took plaee,that decreased the effect of precipitation.

关键词： 12%Cr-W-V-Nb steel martensitic heat-resistant steel Laves phase precipitation behavior