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Modelling of a shape memory alloy actuator for feedforward hysteresis compensator considering load fluctuation

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CAAI Transactions on Intelligence Technology 2022年第4期7卷 549-560页

作者： Seiji saito Shouta Oka Ribun Onodera Department of Electronics and Information Science Polytechnic UniversityKodairaTokyoJapan

This paper presents a hysteresis mathematical model of a shape memory alloy(SMA)actuator for feedforward hysteresis *** hysteresis model represents the relation between temperature,stress,and electric ***,based on the laws of thermodynamics,the hysteresis model of the SMA actuator is ***,the inverse of the hysteresis model is obtained to produce a compensator for non‐linear characteristics such as hysteresis and ***,the parameters of the hysteresis model are obtained from each experiment under constant load and constant temperature,and the model validity is confirmed by comparing experimentally obtained ***,the inverse model is applied to a part of feedforward hysteresis *** order to verify the effectiveness of the proposed model as hysteresis compensator,an electrical resistance control using feedback-feedforward control was conducted by numerical *** simulation results indicate advantages of the proposed mathematical model in hysteresis compensation of SMA actuator,and demonstrate that the model is capable of handling load fluctuation.

关键词： hysteresis inverse thermodynamics

Dedifferentiated chondrosarcoma of the middle finger arising from a solitary enchondroma:A case report

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World Journal of Clinical Cases 2022年第10期10卷 3297-3305页

作者： Hirotaka Yonezawa Norio Yamamoto Katsuhiro Hayashi Akihiko Takeuchi Shinji Miwa Kentaro Igarashi Sei Morinaga Yohei Asano Shiro saito Yasunori Tome Hiroko Ikeda Takayuki Nojima hiroyuki Tsuchiya Department of Orthopaedic Surgery Graduate School of Medical SciencesKanazawa UniversityKanazawa 920-8641IshikawaJapan Department of Orthopedic Surgery Graduate School of MedicineUniversity of the RyukyusNishihara 903-0215OkinawaJapan Department of Diagnostic Pathology Kanazawa University HospitalKanazawa 920-8641IshikawaJapan

BACKGROUND Dedifferentiated chondrosarcoma(DDCS)accounts for 10%of all chondrosarcomas and has the poorest outcome,with a 5-year survival rate of 7%-25%.DDCS commonly occurs in the femur and pelvis,whereas DDCS of the finger is extremely ***,the histological findings of preexisting solitary enchondroma samples are important and valuable for diagnosing malignant *** SUMMARY We report our experience with DDCS in the proximal phalanx of the left middle finger of an 87-year-old *** had undergone surgery for enchondroma,with curettage and artificial bone grafting,11 years ago,in the same *** years after the primary surgery,the left middle finger gradually started to enlarge,and the growth speed increased in the past *** radiographs showed an expansive osteolytic lesion with calcifications and residual grafting *** to the suspicion of malignancy,we performed ray *** findings revealed an abrupt transition between the low-grade chondrosarcoma and dedifferentiated sarcoma *** dedifferentiated components showed the features of a high-grade undifferentiated pleomorphic *** patient was diagnosed with DDCS arising from a preexisting *** had no local recurrence or distant metastasis and died of pneumonia 6 years and 10 months after the second *** The histological findings of a precursor lesion showed a typical enchondroma,suggesting that DDCS can arise from enchondroma.

关键词： Dedifferentiated chondrosarcoma Enchondroma Finger Phalanx Ray amputation Case report

Risk prediction of common bile duct stone recurrence based on new common bile duct morphological subtypes

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World Journal of Gastrointestinal Surgery 2022年第8期14卷 874-876页

作者： Hirokazu saito Shuji Tada Department of Gastroenterology Kumamoto City HospitalKumamoto 862-8505Japan

Stones in the common bile duct(CBD) are reported worldwide, and this condition is majorly managed through endoscopic retrograde cholangiopancreatography(ERCP). CBD stone recurrence is an important issue after endoscopic stone removal. Therefore, it is essential to identify its risk factors to determine the necessity of regular follow-up in patients who underwent endoscopic removal of CBD stones. The authors identified that the S and polyline morphological subtypes of CBD were associated with increased stone recurrence. New morphological subtypes of CBD presented by the authors can be important risk predictors of recurrence after endoscopic stone removal. Furthermore, the new morphological subtypes of CBD may predict the risk of residual CBD stones or technical difficulty in CBD stone removal. Further studies with a large sample size and longer follow-up durations are warranted to examine the usefulness of the newly identified morphological subtypes of CBD in predicting the outcomes of ERCP for CBD stone removal.

关键词： Endoscopic retrograde cholangiopancreatography Common bile duct stone Stone removal Recurrence Common bile duct morphology Risk prediction

Stability improvement mechanism due to less charge accumulation in ternary polymer solar cells

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npj Flexible Electronics 2022年第1期6卷 194-203页

作者： Dong Xue Masahiko saito Itaru Osaka Kazuhiro Marumoto Division of Materials Science University of TsukubaTsukubaIbaraki 305-8573Japan Graduate School of Advanced Science and Engineering Hiroshima UniversityHigashihiroshimaHiroshima 739-8527Japan Tsukuba Research Center for Energy Materials Science(TREMS) University of TsukubaTsukubaIbaraki 305-8571Japan

Ternary polymer solar cells based on a thiazolothiazole-based polymer donor(PTzBT)and a fullerene acceptor(PC61BM)have attracted attention because they show high efficiency and stability by addition of a non-fullerene acceptor(ITIC).However,the performance improvement mechanism is not completely ***,we show the stability improvement mechanism due to less charge accumulation in the PTzBT cells with ITIC using operando electron spin resonance from a microscopic *** observed two correlations between device performance and number of spins(N_(spin))under solar *** correlation is the decrease in short-circuit current and the N_(spin) increase in electrons on PC_(61)BM and holes in PTzBT,where the ITIC addition causes the less these N_(spin).The other correlation is the increase in open-circuit voltage and the N_(spin) decrease in holes in *** findings explain the stability improvement mechanism,showing the correlation between less charge accumulation and higher stability,which is valuable for the development of further efficient and stable polymer solar cells.

关键词： charge stability polymer

不同外源寡糖对设施黄瓜生理特性及产量和品质影响差异

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中国农业气象 2024年第4期45卷 390-403页

作者：杨倚钢韩燕高丽娟宋吉青斋藤信白文波中国农业科学院农业环境与可持续发展研究所/农业农村部农膜污染防控重点实验室北京100081 北京市科学技术研究院分析测试研究所(北京市理化分析测试中心) 北京100089 日本株式会社力森诺科东京1058518

选择壳寡糖(GT)和复合寡糖(KP)为制剂处理,以大棚常规对照(CG)和清水对照(CK)为对比,分析黄瓜叶片叶绿素相对含量(SPAD)、叶绿素荧光参数和超微结构,根系表观形态和根系活力(RV),以及抗氧化酶和内源激素的变化,比较不同类型寡糖制剂对... 详细信息

选择壳寡糖(GT)和复合寡糖(KP)为制剂处理,以大棚常规对照(CG)和清水对照(CK)为对比,分析黄瓜叶片叶绿素相对含量(SPAD)、叶绿素荧光参数和超微结构,根系表观形态和根系活力(RV),以及抗氧化酶和内源激素的变化,比较不同类型寡糖制剂对设施黄瓜生长及产量的调控作用。结果表明:与其他处理相比,KP处理能有效促进黄瓜叶片和根系生长,其SPAD、最大光化学量子产量(Fv/Fm)、光化学淬灭系数(qP)、非光化学淬灭系数(NPQ)和RV均显著增加4.15%~15.63%、6.49%~20.03%、33.33%~152.63%、10.37%~71.62%和8.51%~171.43%;超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性显著提升6.75%~91.49%、3.85%~97.62%和3.00%~28.15%;此外,促使黄瓜生育后期叶片生长素(IAA)含量显著提高5.43%以上,脱落酸(ABA)含量显著降低4.35%~18.63%;黄瓜产量和可溶性糖含量显著增加13.72%和11.52%以上。比较而言,GT处理对黄瓜根冠生长,内源激素和抗氧化酶活性的影响表现出不稳定性,仅坐果期叶片光合生理特性(SPAD、叶绿素荧光参数和叶片超微结构)和RV有所改善。相较于GT处理,KP处理在促进黄瓜根冠生长,调控抗氧化酶活性和内源激素平衡方面具有明显优势。结合相关性分析发现,黄瓜产量与NPQ、RV、SOD和POD活性呈极显著正相关(P<0.01),与Fv/Fm显著正相关(P<0.05);且SOD和POD活性均与ABA含量显著负相关(P<0.05)。综上,外源复合寡糖主要通过促进黄瓜根冠协调生长,维持生育后期高光合效率、根系活力和叶片功能结构稳定,调节抗氧化酶活性,促进生长激素和抑制生长激素间的平衡,保障生育后期细胞膜功能稳定,延缓叶片自然衰老,实现黄瓜的提质增产。

关键词：设施黄瓜复合寡糖壳寡糖生理特性产量品质

Flexible,solid-state,fiber-network-reinforced composite solid electrolyte for long lifespan solid lithium-sulfurized polyacrylonitrile battery

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Nano Research 2022年第4期15卷 3290-3298页

作者： Shiqiang Luo Enyou Zhao Yixuan Gu Nagahiro saito Zhengxi Zhang Li Yang Shin-ichi Hirano School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong UniversityShanghai 200240China Department of Chemical Systems Engineering Nagoya UniversityNagoya 4648603Japan Shanghai Electrochemical Energy Devices Research Center Shanghai 200240China Hirano Institute for Materials Innovation Shanghai Jiao Tong UniversityShanghai 200240China

Solid lithium-sulfur batteries(SLSBs)show potential for practical application due to their possibility for high energy ***,SLSBs still face tough challenges such as the large interface impedance and lithium dendrite ***,a highperformance SLSB is demonstrated by using a fiber network reinforced Li_(6.75)La_(3)Zr_(1.75)Ta_(0.25)O_(12)(LLZTO)based composite solid electrolyte(CSE)in combination with sulfurized polyacrylonitrile(SPAN)*** CSE consisting of an electrospun polyimide(PI)film,LLZTO ionically conducting filler and polyacrylonitrile(PAN)matrix,which is named as PI-PAN/LLZTO CSE,possesses high room-temperature ionic conductivity(2.75×10^(-4)S/cm),high Li^(+)migration number(tLi+)of 0.67 and good interfacial *** is utilized due to its unique electrochemical properties:reasonable electronic conductivity and no polysulfides shuttle *** CSE enables a highly stable Li plating/stripping cycle for over 600 h and good rate ***,the assembled SLSB exhibits good cycle performance of accomplishing 120 cycles at 0.2 C with the capacity retention of 474 mAh/g,good rate properties and excellent long-term cycling stability with a high capacity retention of 86.49%from 15^(th)to 1,000^(th)cycles at 1.0 *** work rationalizes our design concept and may guide the future development of SLSBs.

关键词： solid lithium-sulfur battery composite solid electrolyte sulfurized polyacrylonitrile cathode interfacial wettability dendritefree

Dorsal approach for isolated volar fracture-dislocation of the base of the second metacarpal:A case report

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世界临床病例杂志 2023年第28期11卷 6871-6876页

作者： Taketo Kurozumi Masato saito Kazuhiko Odachi Fumiaki Masui Trauma Center Toranomon HospitalTokyo 105-8470Japan Department of Orthopedic Surgery Chiba-Nishi General HospitalChiba 270-2251Japan

BACKGROUND We report a case with the displacement of an articular fracture fragment of the base of the second metacarpal from the ulnar to the volar side,treated via the dorsal *** dorsal approach can be a good option not only because it allows direct observation of ligament damage and fixation of bone fragments but also because the thin subcutaneous tissue makes the approach *** SUMMARY A 45-year-old man with a right hand injury visited the hospital.A small bone fragment was identified using plain *** radiography revealed the fragment as lying over the volar aspect of the carpometacarpal(CMC)*** tomography revealed that approximately one-third of the CMC joint surface of the second metacarpal was *** provisionally diagnosed an intra-articular fracture with significant CMC joint instability and performed open reduction and internal *** made a dorsal longitudinal incision over the CMC joint between the second and third *** dorsal ligament of the third CMC joint was *** thought it had been dislocated to the volar side and spontaneously reduced to that *** are only few reports of volar dislocation of CMC joint fractures,particularly of the second and third metacarpals;our report is unique as our patient had an intact interosseous ligament between the second and third *** Although past reports have used a palmar approach,the dorsal approach is a good option for these cases.

关键词： Metacarpal bone Fracture-dislocation Mechanism Dorsal approach Carpometacarpal joint Case report

Drug-induced entero-colitis due to interleukin-17 inhibitor use;capsule endoscopic findings and pathological characteristics:A case report

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世界胃肠病学杂志:英文版 2023年第32期29卷 4912-4919页

作者： Keita saito Kiichiro Yoza Shinichiro Takeda Yoshihiro Shimoyama Ken Takeuchi Department of Gastroenterology Tsujinaka Hospital Kashiwano-HaKashiwa 277-0871Japan

BACKGROUND Interleukin-17(IL-17)inhibitors are known to cause exacerbation or new onset of inflammatory bowel disease upon ***,few reports have described characteristic endoscopic and histopathologic findings,and no small intestinal lesions have been reported so *** SUMMARY A woman in her 60s with psoriasis was administered ixekizumab(IXE),an anti-IL-17A antibody,for the treatment of *** months after commencing treatment,the patient visited our hospital because of persistent *** tests performed at the time of the visit revealed severe inflammation,and colonoscopy revealed multiple round ulcers throughout the colon.A tissue biopsy of the ulcer revealed infiltration of inflammatory cells and granuloma-like findings in the submucosal *** endoscopy revealed multiple jejunal *** the withdrawal of IXE,the symptoms gradually improved,and ulcer reduction and scarring of the colon were endoscopically *** To the best of our knowledge,17 reports have documented IL-17 inhibitorinduced entero-colitis with endoscopic images,endoscopic findings,and pathological characteristics,including the present *** of these cases showed diffuse loss of vascular pattern,coarse mucosa/ulcer formation in the left colon,and endoscopic findings similar to those of ulcerative *** the remaining eight cases,discontinuous erosions and ulcerations from the terminal ileum to the rectum were seen,with endoscopic findings similar to those of Crohn’s *** this case,the findings were confirmed by capsule endoscopy,which has not been previously reported.

关键词： Interleukin-17 inhibitor Ixekizumab Drug-induced entero-colitis Capsule endoscopy Case report

Increased utilization and mass activity of PtRu on reduced graphene oxide by heat treatment of its aerogel followed by composite with nanomaterials

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Carbon Resources Conversion 2023年第3期6卷 205-214页

作者： Kenta Dejima Hirokazu Ishitobi He Gao Mai saito Nobuyoshi Nakagawa Graduate School of Science and Technology Gunma University1-5-1Tenjin-choKiryuGunma 376-8515Japan Division of Environmental Engineering Science Gunma University1-5-1Tenjin-choKiryuGunma 376-8515Japan Faculty of Science and Technology Gunma University1-5-1Tenjin-choKiryuGunma 376-8515Japan

The method to increase PtRu utilization and its catalytic activity of PtRu nanoparticles supported on reduced graphene oxide(RGO)by avoiding its restacking was proposed with the aim of developing an active catalyst for a direct methanol fuel *** heat treatment at 200◦C of the GO aerogel(GOA)prepared by freeze drying of GO ice was introduced to weaken the attractive force of the hydrogen bonding between the GO sheets followed by the composite with the nanoparticles,i.e.,ketjenblack(KB),TiO_(2)and Ti_(4)O_(7),at different weight *** catalyst supported on the heat-treated GOA(RGOA),PtRu/RGOA,improved the PtRu utilization to some extent and also increased the ECSA and mass activity compared to that of PtRu/*** had fewer oxygen functional groups,especially the epoxy *** to the treatment and composite,the PtRu utilization was increased from 66.5%for PtRu/RGO to 128.6%for PtRu/RGOA+Ti_(4)O_(7)(4:1)and the mass activity was improved from 50.7 A/g-PtRu for PtRu/RGO to 130.5 A/g-PtRu for PtRu/RGOA+Ti_(4)O_(7)(1:1).The Ti_(4)O_(7)nanoparticles showed the best catalytic performance for the composite suggesting that the strong interaction between Ti_(4)O_(7)and the Pt nanoparticles was effective due to its high electronic conductivity.

关键词： Reduced graphene oxide Restacking Catalyst utilization Mass activity Composite catalyst Methanol oxidation Ti4O7