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Effect of Au/Ni/4H–SiC Schottky junction thermal stability on performance of alpha particle detection

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Chinese Physics B 2018年第8期27卷 482-486页

作者： Xin Ye xiao-chuan xia Hong-Wei Liang Zhuo Li He-Qiu Zhang Guo-Tong Du Xing-Zhu Cui xiao-Hua Liang School of Microelectronics Dalian University of TechnologyDalian 116024China School of Physics Dalian University of TechnologyDalian 116024China Institute of High Energy Physics Chinese Academy of Sciences（CAS）Beijing 100049China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of Sciences Beljing 100049China

Au/Ni/n-type 4H-SiC Schottky alpha particle detectors are fabricated and annealed at temperatures between 400℃ and 700 ℃ to investigate the effects of thermal stability of the Schottky contact on the structural and electrical properties of the detectors. At the annealing temperature of 500 ℃, the two nickel silicides （i.e., Ni31Sil2 and Ni2Si） are formed at the interface and result in the formation of an inhomogeneous Schottky barrier. By increasing the annealing temperature, the Ni31Sil2 transforms into the more stable Ni2Si. The structural evolution of the Schottky contact directly affects the electrical properties and alpha particle energy resolutions of the detectors. A better energy resolution of 2.60% is obtained for 5.48-MeV alpha particles with the detector after being annealed at 600 ℃. As a result, the Au/Ni/n-type 4H-SiC Schottky detector shows a good performance after thermal treatment at temperatures up to 700℃.

关键词： alpha particle detector silicon carbide thermal stability Schottky barrier

Simulation of GaN micro-structured neutron detectors for improving electrical properties

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Chinese Physics B 2020年第2期29卷 414-419页

作者： Xin-Lei Geng xiao-chuan xia Huo-Lin Huang Zhong-Hao Sun He-Qiu Zhang Xing-Zhu Cui xiao-Hua Liang Hong-Wei Liang School of Microelectronics Dalian University of TechnologyDalian 116024China School of Optoelectronic Engineering and Instrumentation Science Dalian University of TechnologyDalian 116024China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China

Nowadays,the superior detection performance of semiconductor neutron detectors is a challenging *** this paper,we deal with a novel GaN micro-structured neutron detector(GaN-MSND)and compare three different methods such as the method of modulating the trench depth,the method of introducing dielectric layer and p-type inversion region to improve the width of depletion region(W).It is observed that the intensity of electric field can be modulated by scaling the trench *** the other hand,the electron blocking region is formed in the detector enveloped with a dielectric ***,the introducing of p-type inversion region produces new p/n junction,which not only promotes the further expansion of the depletion region but also reduces the intensity of electric field produced by main *** can be realized that all these methods can considerably enhance the working voltage as well as *** them,the improvement on W of GaN-MSND with the p-type inversion region is the most significant and the value of W could reach 12.8μm when the carrier concentration of p-type inversion region is 10^17 cm^-***,the value of W is observed to improve 200%for the designed GaN-MSND as compared with that without additional *** work ensures to the researchers and scientific community the fabrication of GaN-MSND having superior detection limit in the field of intense radiation.

关键词： GaN micro-structured neutron detector depletion region electric field

Effect of BaO and MgO on structure and properties of aluminate slag with various CaO/Al_(2)0_(3)ratios

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Journal of Iron and Steel Research International 2024年第1期31卷 204-214页

作者： Yu-qi Kong Ting Wu Wen-zhi xia Wen Yang Hai-chuan Wang School of Metallurgical Engineering Anhui University of TechnologyMa’anshan243032AnhuiChina Key Laboratory of Metallurgical Emission Reduction and Resource Recycling(Ministry of Education) Anhui University of TechnologyMa’anshan243002AnhuiChina

To provide theoretical guidance for performance stability control of low-reactive mold fluxes,the effects of BaO and MgO on the structure and properties of aluminate slag with various CaO/Al_(2)0_(3)(C/A)ratios were investigated using the Fourier transform infrared spectrometer,Raman spectroscope,hemispherical melting point instrument,rotational viscometer and X-ray *** results indicated that with BaO and MgO addition,the structure polymerization was first weakened and then enhanced at C/A of 1.1,and the transition contents corresponded to 8 wt.%BaO and 2 wt.%MgO,respectively,while the structure polymerization decreased continuously at C/A of *** the viscosity change was well consistent with the structure evolution,the polymerization degree played a more prominent role in the slag viscosity than superheat degree when the melting temperature difference was within 40℃.The break temperature decreased initially and then increased with augment of BaO and MgO at C/A of 1.1,while it manifested a decrease trend with BaO addition,and it decreased obviously but then turned to increase with MgO increment at C/A of *** crystallization phase and crystallization ratio kept stable with BaO increment,while the crystallization ratio rose greatly with MgO promoting LiAlO_(2)precipitation at C/A of *** crystal types of all experimental slags were mainly Ca_(12)Al_(14)O_(33)and CaF_(2)at C/A of 1.3,and the precipitation of crystalline phase BaAl2O4 demonstrated a rising trend,while that of Ca_(12)Al_(14)O_(33)gradually declined with BaO augment.

关键词： Aluminate slag Structure MgO BaO Viscosity Property

Harmonic Transfer Function Based Single-input Single-output Impedance Modeling of LCC-HVDC Systems

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Journal of Modern Power Systems and Clean Energy 2024年第4期12卷 1327-1332页

作者： Yang Wang Fei xia Ying Wang xianyong xiao College of Electrical Engineering Sichuan UniversityChengdu 610065China

This study presents a harmonic transfer function(HTF)based single-input single-output(SISO)impedance modeling *** method converts an HTF from phase domain to sequence domain and then transforms it into an SISO impedance while preserving the frequency coupling information of different sequences and different *** of this method to a line-commutated converter based high-voltage direct current(LCC-HVDC)system are *** results demonstrate the accuracy of the derived SISO impedance,and a truncation-order selection is *** case study shows that the proposed method facilitates simpler impedance measurements and associated stability analysis.

关键词： Line-commutated converter based high-voltage direct current(LCC-HVDC) harmonic transfer function(HTF) single-input single-output(SISO)impedance frequency coupling

PEGylated bacteria restore intestinal mucosal barrier

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Acta Pharmaceutica Sinica B 2024年第9期14卷 4186-4188页

作者： Menghang Zu Xue xia Bo xiao State Key Laboratory of Resource Insects College of SericultureTextileand Biomass SciencesSouthwest UniversityChongqing 400715China Department of Pharmacy Personalized Drug Therapy Key Laboratory of Sichuan ProvinceSichuan Provincial People’s HospitalSchool of MedicineUniversity of Electronic Science and Technology of ChinaChengdu 610054China

The mucosal barrier of the gastrointestinal tract(GIT)is crucial for the overall health of the *** disruption permits the infiltration of intestinal microorganisms into the underlying mucosa,resulting in infections and inflammatory conditions,such as inflammatory bowel disease(IBD),metabolic disorders,and autoimmune diseases1,***,strategies to protect the mucosal barrier from exogenous stimuli or to facilitate its recovery have become increasingly ***,immunomodulators,corticosteroids,and biological agents have been widely employed to treat IBD by alleviating inflammation and enhancing mucosal ***,they can also produce serious systemic toxicity3,4;therefore,there is an urgent need for exploiting innovative strategies to fortify the intestinal mucosal barrier against the invasion of exogenous damaging factors.

关键词： PEGylation Probiotic Mucus penetration Colonic mucosal barrier Colitis Diabetes

Comparison of different preoperative objective nutritional indices for evaluating 30-d mortality and complications after liver transplantation

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World Journal of Gastrointestinal Surgery 2024年第1期16卷 143-154页

作者： chuan Li Hong-xia Chen Yan-Hua Lai Department of Transplantation People’s Hospital of Guangxi Zhuang Autonomous RegionNanning 530021Guangxi Zhuang Autonomous RegionChina Department of Clinical Pharmacy People’s Hospital of Guangxi Zhuang Autonomous RegionNanning 530021Guangxi Zhuang Autonomous RegionChina

BACKGROUND The nutritional status is closely related to the prognosis of liver transplant re-cipients,but few studies have reported the role of preoperative objective nutri-tional indices in predicting liver transplant *** To compare the predictive value of various preoperative objective nutritional indicators for determining 30-d mortality and complications following liver transplantation(LT).METHODS A retrospective analysis was conducted on 162 recipients who underwent LT at our institution from December 2019 to June *** This study identified several independent risk factors associated with 30-d mor-tality,including blood loss,the prognostic nutritional index(PNI),the nutritional risk index(NRI),and the control nutritional *** 30-d mortality rate was 8.6%.Blood loss,the NRI,and the PNI were found to be independent risk factors for the occurrence of severe postoperative *** NRI achieved the highest prediction values for 30-d mortality[area under the curve(AUC)=0.861,P<0.001]and severe complications(AUC=0.643,P=0.011).Compared to those in the high NRI group,the low patients in the NRI group had lower preoperative body mass index and prealbumin and albumin levels,as well as higher alanine aminotransferase and total bilirubin levels,Model for End-stage Liver Disease scores and prothrombin time(P<0.05).Furthermore,the group with a low NRI exhibited significantly greater incidences of intraabdominal bleeding,primary graft nonfunction,and *** The NRI has good predictive value for 30-d mortality and severe complications following *** NRI could be an effective tool for transplant surgeons to evaluate perioperative nutritional risk and develop relevant nutritional therapy.

关键词： Liver transplantation Nutritional indicator Complications Prognosis Nutrition assessment

Effects of fluid therapy combined with a preoperative glucose load regimen on postoperative recovery in patients with rectal cancer

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World Journal of Gastrointestinal Surgery 2024年第8期16卷 2662-2670页

作者： Lv-Chi xia Ke Zhang chuan-Wen Wang Department of Emergency Medicine Jiujiang First People's HospitalJiujiang 332000Jiangxi ProvinceChina

BACKGROUND Patients with rectal cancer undergoing radical resection often have poor post-operative recovery due to preoperative fasting and water deprivation and the removal of diseased tissue,and have a high risk of ***,it is of great significance to apply appropriate rehydration regimens to patients un-dergoing radical resection of rectal cancer during the perioperative period to improve the postoperative outcomes of *** To analyze the effects of goal-directed fluid therapy(GDFT)with a preoperative glucose load regimen on postoperative recovery and complications in patients undergoing radical resection for rectal *** Patients with rectal cancer who underwent radical resection(n=184)between January 2021 and December 2023 at our hospital were randomly divided into either a control group or an observation group(n=92 in each group).Both groups received a preoperative glucose load regimen,and routine fluid replacement and GDFT were additionally implements in the control and observation groups,*** operative conditions,blood levels of lactic acid and inflammatory markers,postoperative recovery,cognitive status,hemodynamic indicators,brain oxygen metabolism,and complication rates were compared between the *** The colloidal fluid dosage,total infusion,and urine volume,as well as time to first exhaust,time to food intake,and postoperative length of hospital stay,were lower in the observation group(P0.05).Compared with the control group,in the ob-servation group the lactic acid level was lower immediately after the surgery(P<0.05);the Mini-Mental State Examination score was higher on postoperative day 3(P<0.05);the pulse pressure variability(PPV)was lower at 30 min after pneumoperitone

关键词： Radical resection of rectal cancer Goal-directed fluid therapy Preoperative glucose load Cognitive condition Complication

Dynamic manipulation of multimodal emission in Er^(3+)-activated non-core-shell structure for optical thermometry and information security

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Rare Metals 2024年第4期43卷 1702-1712页

作者： Xuan Liu Zi-xia Lin Yin-Biao Shi xiao-Yan Wang Ming-Ye Ding xiao-Fei Yang College of Science Nanjing Forestry UniversityNanjing210037China Testing Center Yangzhou UniversityYangzhou225009China

Regulating luminescent dynamics of lanthanide-based luminescent materials via external stimuli is of great significance in the fields of optical thermometry and high-level ***,it is still a huge challenge to realize multimodal emissions with tunable color outputs from a single activator in simple structures via smart dynamic control of photon transition ***,we present a mechanistic strategy to achieve multimodal luminescence of Er^(3+)activators with color-switchable outputs in a non-core-shell *** the control of excitation dynamics(λ_(ex)=980,808,1532,377 nm),the population among the intermediate en ergy levels of Er^(3+)and the interaction between Er^(3+)and Yb^(3+)could be precisely modulated through energy transfer and migration processes,leading to the generation of colortunable multimodal luminescence upon diverse excitation modes(non-steady-state,single-/dual-wavelength steady,thermal activation).Inspired by its special luminescent performance,the as-obtained material exhibits great potential in noncontact thermometry,multimodal anticounterfeiting,and high-capacity information encryption by performing a series of proof-of-concept *** findings might provide a conceptual model to modulate the luminescent dynamics in a simple-structured system for the generation of color-adjustable multimodal emissions,which is convenient for the development of advanced luminescent materials toward versatile cuttingedge applications.

关键词： Lanthanide ions Multimodal emission Upconversion Downshifting Anti-counterfeiting Luminescent thermometry

Advancements in nutritional diagnosis and support strategies during the perioperative period for patients with liver cancer

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World Journal of Gastrointestinal Surgery 2024年第8期16卷 2409-2425页

作者： xiao-Qin Li Yun Liang Chen-Feng Huang Sui-Ning Li Lei Cheng chuan You Yao-xia Liu Tao Wang Department of Hepatobiliary Surgery The Affiliated Hospital of North Sichuan Medical CollegeNanchong 637000Sichuan ProvinceChina Department of Paediatric Surgery The Affiliated Hospital of North Sichuan Medical CollegeNanchong 637000Sichuan ProvinceChina Department of Cardiovascular Surgery The First Affiliated HospitalJinan UniversityGuangzhou 510632Guangdong ProvinceChina Department of Geriatric Endocrinology Sichuan Provincial People's HospitalUniversity of Electronic Science and Technology of ChinaChengdu 610072Sichuan ProvinceChina Department of Pediatric Cardiology West China Second University HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Pediatrics Key Laboratory of Birth Defects and Related Diseases of Women and Children(Sichuan University)Ministry of EducationChengdu 610041Sichuan ProvinceChina

Liver cancer represents a grave hepatic condition and constitutes a significant global health *** resection remains the principal therapeutic modality for liver ***,perioperative malnutrition exerts a notable impact on patients with liver cancer,emerging as an independent risk factor for disease mortality and adverse ***,precise nutritional diagnosis and timely nutritional support hold the potential to enhance therapeutic efficacy and quality of life for liver cancer *** study represents a meticulous foray into the literature,extracting data from PubMed,Web of Science,and EMBASE databases,with a focus on the past 5 *** scrutinizes the impact of malnutrition on patients undergoing liver cancer surgery,the etiological underpinnings of malnutrition within this patient cohort,the critical assessment of perioperative nutritional status,and the strategic approaches to nutritional *** rigorous inclusion and exclusion criteria,the amassed scholarly works are meticulously synthesized,methodically organized,and categorically elaborated ***,the authors propose the incorporation of a multidisciplinary nutrition management team during the perioperative period,comprising nutritionists,pharmacists,physicians,nurses,psychologists,and rehabilitation therapists,among other specialized ***,they collaborate to devise and implement personalized nutritional support plans,monitor patients’nutritional status,and make necessary adjustments as *** comprehensive management and intervention,improvements in the nutritional status of liver cancer patients can be achieved,thereby enhancing surgical success rates and facilitating postoperative *** is believed that this manuscript will offer valuable insights to advance the nutritional management during the perioperative phase of liver cancer,aiding in ameliorating patients'nutritional status and treatment outcomes.

关键词： Liver cancer Nutritional diagnosis Nutritional support Perioperative period Genetic testing Immunonutrition Probiotics and gut microbiota