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Applied Biofloc Technology for Target Species in the Mekong Delta in Vietnam： A Review

Journal of Environmental Science and Engineering(B) 2017年第4期6卷 165-175页

作者： Nguyen Van Hoa Ta Van Phuong Tran Ngoc Hai chau tai tao Le Quoc Viet Nguyen Thi Hong Van Huynh Thanh Toi Tran Huu Le Vo Nam Son Pham Quoc Anh Duy College of Aquaculture and Fisheries (CAF) Cantho University Cantho 270000-910000 Vietnam College of Applied Biology Tay Do University Cantho 270000-910000 Vietnam

BFT （Biofloc Technology） has been currently applied in Cantho University to a number of targeted species from fresh-to marine and saline water species in the Mekong Delta, e.g. striped catfish （Pangasianodon hypophthalmus）, white leg shrimp （Litopenaeus vannamei）, tiger shrimp （Penaeus monodon） and Artemia Vinhchau strain （Artemia franciscana） for both in the lab-scales or production scales. The best growth and survival rate of striped catfish was obtained in 6%o. For white leg shrimp, the results indicated：（1） C （Carbon） source e.g. rice-flour or molasses supplementary based on the feed provided to promote survival, growth and shrimp biomass harvested; （2） it was fed less than 20% as usual but showed similar to those in the control; （3） combination of rice-flour and molasses at a ratio of 70：30 by weight of C and N （Nitrogen） in a ration of 15：1 enhanced shrimp survival and growth; （4） in intensive culture, shrimp could be against the infection of disease and end up with higher survival, growth in earthen ponds. For tiger shrimp, a set up for larvae till post larvae at different ratios of C and N and C：N of 30 PLI5 displayed with better survival rate （49.73 ± 7.07%） and production （74,596 ± 10.608 PL/m3）. Artemiafranciscana was set up at C：N = 10：1 and salinities from 35, 60, 80 and 100 ppt. After two weeks, there were no significant difference among treatment and the control （without biofloc） in term of survival and growth. Moreover, total embryos per female was not significant different with the control and even the number of embryos as cysts tended to be higher. BFT displayed its advantages when applied on culture system of different targeted species and there is no doubt that it could help to sustain aquaculture and save environment in the Mekong Delta in near future.

关键词： Biofloc techology striped catfish white leg shrimp tiger shrimp Artemia Vinhchau strain.

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Preparation of Ultrafine Tungsten Powder by Sol-Gel Method

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Journal of Materials Science & Technology 2008年第5期24卷 816-818页

作者： Yuxian HAN tai QIU tao SONG College of Materials Science and Engineering Nanjing University of Technology Nanjing 210009 China

Sol-gel method was employed for the preparation of nanoscale tungsten powder. The effects of different preparation conditions on particle size were discussed and the optimum preparation condition was found. The products were characterized by X-ray diffraction, scan electron microscopy and so on. The results show that the intermediate is monoclinic WO3, its particle shape is approximately spherical, and the particle size distribution is narrow. The average particle size is about 60 nm. After deoxidization, WO3 turns into cubic tungsten powder with small particle size （average particle size about 120 nm） and narrow size distribution.

关键词： Sol-gel method Tungsten trioxide Deoxidize Ultra-fine tungsten powder

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Spectral Properties of an Energy-Dependent Hamiltonian

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Communications in Mathematical Research 2021年第2期37卷 141-179页

作者： Pierre chau Huu-tai Bernard Ducomet CEA DAMDIFF-91297 ArpajonFrance.2 Universite Paris-EstLAMA(UMR 805)UPEMLVUPECCNRS61 Avenue du General de GaulleF-94010 CreteilFrance

We study spectral properties of a quantum Hamiltonian with a complex-valued energy-dependent potential related to a model introduced in physics of nuclear reactions[30]and we prove that the principle of limiting absorption holds at any point of a large subset of the essential *** an additional dissipative or smallness hypothesis is assumed on the potential,we show that the principle of limiting absorption holds at any point of the essential spectrum.

关键词： Non-selfadjoint complex potentia dissipative limiting absorption principle spectral singularity energy dependent potential

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LES investigation of the tip vortex cavitating flow with special emphasis on the interaction between cavitation and vorticity by a modified cavitation model

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Journal of Hydrodynamics 2023年第3期35卷 594-606页

作者： Xin-ran Liu tao Wang Xiao-yang Zhao tai-ran Chen School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China Vehicle Engineering Department Army Academy of Armored ForcesBeijing 100072China China Ship Research and Development Academy Beijing 100085China

Cavitation within the tip vortex(TV)flow remains a challenging issue in the design of high-speed and low-noise hydraulic *** this paper,the TV cavitating flow around an elliptical hydrofoil is calculated by using large eddy simulation(LES)combined with a modified Schnerr-Sauer(S-S)cavitation *** original S-S cavitation model is modified by taking into account the typical effect of vortex *** partial pressure term which can describe the vortex quantitatively and qualitatively is confirmed asρ_(m)ω^(2) x r _(c)^(2) ,and is considered into the R-P equation of the modified S-S cavitation *** between the numerical and experimental results shows good agreement in the form and evolution of cavities,including attached cavities(AC)and tip vortex cavities(TVC).The vorticity transport equation is utilized to investigate the dynamic mechanisms of the vortex development around the *** analyses indicate that cavitation in the TV flow influences the pressure in the core of the cavity and the local flow *** vortex structures in the TV cavitating flow include TV,secondary vortex(SV)and wake vortex(WV).The direction and magnitude of the rotation effect can be described by axial vorticity which is drawn on the iso-surface of Q=1×105 s−*** development of the TV cavitating flow can be divided into two stages:Stage I,the development and fusion of TV,SV,stage II,the dissipation of *** stretching term dominates the evolution of TV,and the dilatation term is the main reason in the mergence process of SV.

关键词： Cavitating flow tip vortex(TV) large eddy simulation(LES) cavitation model

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Glissonian approach combined with major hepatic vein first for laparoscopic anatomic hepatectomy

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Hepatobiliary & Pancreatic Diseases International 2018年第4期17卷 316-322页

作者： De-Cai Yu Xing-Yu Wu Xi-tai Sun Yi-tao Ding Department of Hepatobiliary Surgery The Affiliated Drum Tower HospitalSchool of MedicineNanjing University

Background: Laparoscopic anatomic hepatectomy remains challenging because of the complex interior structures of the liver. Our novel strategy includes the Glissonian approach and the major hepatic vein first, which serves to define the external and internal landmarks for laparoscopic anatomic ***: Eleven cases underwent laparoscopic anatomic hepatectomy, including three right hepatectomies, three left hepatectomies, three right posterior hepatectomies, and two mesohepatectomies. The Glissonian approach was used to transect the hepatic pedicles as external demarcation. The major hepatic vein near the hepatic portal was exposed and served as the internal landmark for parenchymal transection. The liver parenchyma below and above the major hepatic vein was transected along the major hepatic vein. Fifty-nine subjects were used to compare the distance between the major hepatic vein and secondary Glisson pedicles among different liver ***: The average operative time was 327 min with an estimated blood loss of 554.55 m L. Only two patients received three units of packed red blood cells. The others recovered normally and were discharged on postoperative day 7. The distance between right posterior Glissonian pedicle and right hepatic vein was shorter in the patients with cirrhosis than that without cirrhosis, and this distance was even shorter in patients with hepatocellular ***: The Glissonian approach with the major hepatic vein first is easy and feasible for laparoscopic anatomic hepatectomy, especially in patients with hepatocellular carcinoma and cirrhosis.

关键词： Hepatectomy Laparoscopy Liver diseases Surgical procedures Major hepatic vein

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Dynamic properties of micro-NPR material and its controlling effect on surrounding rock mass with impact disturbances

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Underground Space 2024年第2期15卷 331-352页

作者： Manchao He Jie Hu tai Cheng Fei Deng Zhigang tao Hongru Li Di Peng Department of Geotechnical Engineering College of Civil EngineeringTongji UniversityShanghai 200092China State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining&TechnologyBeijing 100083China Luohe Vocational Technology College Henan 462002China

A novel meta steel with negative Poisson’s ratio effect(termed as micro-NPR steel)is developed for rock support in deep underground *** possesses high strength,high ductility,and high energy absorption *** this paper,static tension and modified dynamic drop hammer tests are performed on this novel material to investigate its mechanical properties *** based on this material,a new generation of micro-NPR anchor cable is developed and applied in field tests subjected to blasting dynamic *** results of laboratory tests reveal that the ultimate elongation of micro-NPR steel under dynamic impacts is more than 30%and it is over 1.5 times that of Q235;the plastic and total energy absorption of micro-NPR are both significantly higher than that of *** test indicates the fine controlling effect of micro-NPR anchor cable on surrounding rock mass under dynamic *** force confirms that micro-NPR cables can distribute and absorb the dynamic energy uniformly around the supported rock when subjected to dynamic disturbance,avoiding local failure induced by excessive stress *** excavation compensation principle and energy-absorbing characteristics are used to explain the support ***,micro-NPR material and anchor cable can control and prevent dynamic disasters in deep underground engineering effectively.

关键词： Micro-NPR steel Energy-absorbing Drop hammer test Anchor cable Field test

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Soft X-ray ptychography method at SSRF

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Nuclear Science and Techniques 2017年第6期28卷 86-94页

作者： Chun-Peng Wang Zi-Jian Xu Hai-Gang Liu Xulei tao Ren-Zhong tai Shanghai Institute of Applied Physics Chinese Academy of Sciences University of Chinese Academy of Sciences

Ptychography is a diffraction-based X-ray microscopy technique in which an extended sample is scanned by a coherent beam with overlapped illuminated areas and complex transmission function of the sample is obtained by applying iterative phase retrieval algorithms to the diffraction patterns recorded at each scanned *** permits quantitatively imaging of non-crystalline specimens at a resolution limited only by the X-ray wavelength and the maximal scattering angle *** this paper,the development of soft X-ray ptychography method at the BL08U1 A beamline of Shanghai Synchrotron Radiation Facility is *** experimental setup,experimental parameters selection criteria,and post-experimental data analyzing procedures are presented in detail with a prospect of high-resolution image reconstruction in real *** performance of this newly implemented method is demonstrated through the measurements of a resolution test pattern and two real samples:Pt-Co alloy nanoparticles and a breast cancer *** results indicate that strong scattering specimens can be reconstructed to sub-20 nm resolution,while a sub-25 nm resolution for biological specimens can be achieved.

关键词： Ptychography Coherent diffraction imaging X-ray microscopy Phase retrieval

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Summary of research on frost heave for subgrade in seasonal frozen ground

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Research in Cold and Arid Regions 2021年第3期13卷 195-205页

作者： Shuang Jia BoWen tai ShouChen Qi Lei Li tao Chen School of Hydraulic and Electric Power Heilongjiang UniversityHeilongjiangHarbinHeilongjiang 150086China State Key Laboratory of Frozen Soil Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouGansu 730000China The Fourth Engineering Co. Ltd.China Railway 14th BureauThe Fourth Engineering Co.Ltd.China Railway 14th BureauJinanShandong 250000China

The building of railways on seasonally frozen ground is inevitable as China pursues economic development and the improvement of its citizens'living ***,railway construction in seasonally frozen soil areas is often faced with frost heave,leading to uneven subgrades which seriously threaten traffic *** article summarizes extant research results on frost heave mechanism,frost heave factors,and anti-frost measures of railway subgrades in seasonally frozen soil areas.

关键词： seasonal frozen ground railway subgrade frost heave anti-frost measures

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Combination of low-energy shock-wave therapy and bone marrow mesenchymal stem cell transplantation to improve the erectile function of diabetic rats

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Asian Journal of Andrology 2017年第1期19卷 26-33页

作者： Hai-tao Shan Hai-Bo Zhang Wen-tao Chen Feng-Zhi Chen tao Wang Jin-tai Luo Min Yue Ji-Hong Lin An-Yang Wei Department of Urology Medical Center for Overseas Patients Nanfang Hospital Southern Medical University Guangzhou China Department of Urology Shawan People's Hospital Panyu District Guangzhou China Shenzhen Hyde Medical Equipment Co. Ltd. Shenzhen China Department of Urology Longjiang HospitalShunde District Foshan China Laboratory Animals Center Southern Medical University Guangzhou China.

Stem cell transplantation and low-energy shock-wave therapy （LESWT） have emerged as potential and effective treatment protocols for diabetic erectile dysfunction. During the tracking of transplanted stem cells in diabetic erectile dysfunction models, the number of visible stem cells was rather low and decreased quickly. LESWT could recruit endogenous stem cells to the cavernous body and improve the microenvironment in diabetic cavernous tissue. Thus, we deduced that LESWT might benefit transplanted stem cell survival and improve the effects of stem cell transplantation. In this research, 42 streptozotocin-induced diabetic rats were randomized into four groups： the diabetic group （n = 6）, the LESWT group （n = 6）, the bone marrow-derived mesenchymal stem cell （BMSC） transplantation group （n = 15）, and the combination of LESWT and BMSC transplantation group （n = 15）. One and three days after BMSC transplantation, three rats were randomly chosen to observe the survival numbers of BMSCs in the cavernous body. Four weeks after BMSC transplantation, the following parameters were assessed： the surviving number of transplanted BMSCs in the cavernous tissue, erectile function, real-time polymerase chain reaction, and penile immunohistochemical assessment. Our research found that LESWT favored the survival of transplanted BMSCs in the cavernous body, which might be related to increased stromal cell-derived factor-1 expression and the enhancement of angiogenesis in the diabetic cavernous tissue. The combination of LESWT and BMSC transplantation could improve the erectile function of diabetic erectile function rats more effectively than LESWT or BMSC transplantation performed alone.

关键词： bone marrow mesenchymal stem cell diabetes mellitus erectile function low-energy shock-wave therapy

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Terahertz propagation in metal templates

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Nuclear Science and Techniques 2004年第2期15卷 86-88页

作者： HANJia-Guang ZHANGWei ZHUZhi-Yuan WANGZhen-Xia YULi-Ping SUNLi-tao WANGTing-tai ShanghaiInstituteofAppliedPhysics theChineseAcademyofSciencesShanghai201800

Terahertz (THz) propagation in a metal template has been theoretically demonstrated. The possible propagating frequencies and power transmittance have been calculated. The power transmittance curves are displayed with different incident frequency and different geometric parameters. The oscillations of transmittance dependent on length of the template and the theoretical propagating bandwidth have been found.

关键词：金属样板传播频率功率透射率兆兆赫技术波导管

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