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World Journal of Gastrointestinal Surgery 2024年第10期16卷 3328-3333页

作者： Yang Chen Zong-Qi Fan xin-Ao Fu xiao-xin zhang Jie-Qing Yuan Shi-Gang Guo Department of Gastrointestinal Surgery Chaoyang Central HospitalChina Medical UniversityChaoyang 122000Liaoning ProvinceChina Department of Gastrointestinal Surgery Chaoyang Central HospitalPostgraduate Training Base of China Medical University and Jinzhou Medical UniversityChaoyang 122000Liaoning ProvinceChina

BACKGROUND Because of the mild inflammatory status in acute uncomplicated appendicitis,our team developed a novel technical protocol for single-port laparoscopic appendec-tomy using needle-type grasping forceps(SLAN)and achieved positive clinical ***,the intraoperative procedure lacked stability and fluency due to a series of problems highlighted by the small incision design of the proto-col(only 1 cm long).Therefore,there is a growing clinical demand to further opti-mize the SLAN *** SUMMARY An adult male patient was admitted for persistent right lower abdominal pain with preoperative computed tomography findings suggestive of appendicitis accompanied by localized peritonitis.A modified technical protocol for SLAN based on minimally invasive surgical principles was used,and the patient was confirmed to have acute simple appendicitis by postoperative pathological *** recovery was uneventful,and no postoperative complications,such as incision infection or severe incision pain,were *** patient was discharged successfully on postoperative day *** The modified technical protocol of SLAN may be a new minimally invasive surgical alternative for patients with acute simple appendicitis.

关键词： Acute appendicitis Single-port laparoscopy Appendectomy Minimally invasive surgery Case report

4-[(Furan-2-ylmethylene)-amino]-1,5-dimethyl-1,2-dihyl-1,2-dihydo-pyrazol-3-one

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Chinese Journal of Structural Chemistry 2005年第11期24卷 1310-1313页

作者： LI Zong-xiao zhang xin-Li Department of Chemistry Baoji University of Arts and Science Baoji 721007 China

The title compound （C16H15N3O2, Mr= 281.31） has been synthesized and characterized by elemental analysis and single-crystal X-ray diffraction. The Schiff base compound is a derivative of 4-aminoantipyrine. As expected, the molecular structure adopts a trans configuration about the C=N double bond. It crystallizes in the monoclinic system, space group P2 1/c with a = 11.150（3）, b = 9.906（3）, c = 13.624（4） A, β = 106.360（4）°, V= 1443.9（7） ,A^3, Z = 4, Dc = 1.294 g/cm^3, F（000） = 592,μ（MoKa） = 0.088 mm ^-1, R = 0.0577 and wR = 0.1214. Of the 5766 total reflections, 2540 were unique. In the molecule there exist two different planes of pyrazoline and O（2）-C（10） phenyl ring, which are approximately coplanar （r.m.s. de deviation from the combined mean plane is 0026 A） with the dihedral angle between them of 6.3°.

关键词： 4-[(furan-2-ylmethylene)-amino]-1,5-dimethyl-1,2-dihyl-1,2- dihydo-pyrazol-3-one,crystal structure antipyrine derivative

Nonfunctional pancreatic neuroendocrine tumours misdiagnosed as autoimmune pancreatitis:A case report and review of literature

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World Journal of Clinical Cases 2022年第15期10卷 4886-4894页

作者： Zi-Qi Lin xin Li Yan Yang Yi Wang xiao-Ying zhang xiao-xin zhang Jia Guo Department of Integrated Traditional Chinese and Western Medicine Sichuan Provincial Pancreatitis Centre and West China-Liverpool Biomedical Research CentreWest China HospitalSichuan UniversityChengdu610041Sichuan ProvinceChina Laboratory Medicine West China School of MedicineSichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Radiology West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina

BACKGROUND Nonfunctional pancreatic neuroendocrine tumours are difficult to diagnose in the early stage of disease due to a lack of clinical symptoms,but they can rarely manifest as autoimmune *** pancreatitis is an uncommon disease that may cause recurrent acute pancreatitis and is therefore often regarded as a special type of chronic *** SUMMARY We report a case of a 42-year-old female who had nonspecific upper abdominal pain for 4 years and radiological abnormalities of the pancreas that mimicked autoimmune *** symptoms and pancreatic imaging did not improve following 1 year of steroid ***,pancreatic biopsy was performed through endoscopic ultrasonography-guided fine-needle aspiration biopsy,and nonfunctional pancreatic neuroendocrine tumours were ultimately *** has resolved her *** Therefore,the differentiation of nonfunctional pancreatic neuroendocrine tumours from autoimmune pancreatitis is very important,although it is *** propose that endoscopic ultrasonography-guided fine-needle aspiration biopsy should be performed if imaging characteristics are equivocal or the diagnosis is in question.

关键词： Pancreatic neuroendocrine tumour Nonfunctional pancreatic neuroendocrine tumour Autoimmune pancreatitis Endoscopic ultrasonography-guided fine needle aspiration biopsy Case report

Preparation of W-TiC alloys from core-shell structure powders synthesized by an improved wet chemical method

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Rare Metals 2023年第4期42卷 1378-1386页

作者： Shao-Ting Lang Qing-Zhi Yan Ning-Bo Sun xiao-xin zhang Institute of Nuclear Materials University of Science and Technology BeijingBeijing100083China

In order to improve the homogeneous distribution of the TiC particles and facilitate the TiC particles to distribute in the tungsten grain interiors,two kinds of TiCdoped tungsten precursors with a core-shell structure were prepared by an improved wet chemical method at different reaction temperature ***,fine platelike precursor(200-400 nm)and flower-like precursor(approximately 1.25μm)are *** reduction and sintering,the microstructures of the samples were characterized by scanning electron microscopy and transmission electron *** the sample sintered from the platelike precursor,TiC particles with sizes in the range of40-300 nm and an average size of approximately 80 nm were uniformly distributed in the tungsten matrix with a high share in the grain ***,in the sample sintered from the flower-like precursor,the TiC particles with sizes in the range of 50-700 nm are significantly aggregated and non-uniformly distributed in the tungsten *** a result,the sample sintered from the plate-like precursor achieves higher mechanical properties and a much narrower range of bending strength values than that sintered from the flower-like *** average bending strength of the sample sintered from the plate-like precursor is 655 MPa,which is higher than that of the sample sintered from the flower-like precursor(524 MPa).Different reaction mechanisms and dispersing stabilities of the TiC particles at different temperature conditions should be accounted for the differences between the two samples.

关键词： Wet chemical method W-TiC alloy Core-shell structures Spark plasma sintering Microstructure characterization

SAGE based iterative receiver for joint synchronization and channel estimation in uplink MIMO-OFDMA systems

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The Journal of China Universities of Posts and Telecommunications 2008年第3期15卷 100-104页

作者： JIANG Zheng QIN xiao-fang zhang xin CHANG Yong-yu Wireless Theories and Technologies Laboratory Beijing University of Posts and Telecommunications Beijing 100876 China

A new Turbo iterative receiver structure is proposed for the uplink multiple-input multiple-output orthogonal frequency division multiple access （MIMO-OFDMA） systems. The space-alternating generalized expectation-maximization （SAGE） algorithm is naturally embedded in the framework of iterative receiver to perform synchronization and detection usin~ the Turbo detector outputs. In each iteration, the expectation step intends to remove the multiple access interference （MAI） caused by other asynchronous users, and the maximization step is utilized to estimate the required parameters （i.e., timing offset, carrier frequency offset, channel state information, etc.） sequentially for each user. Simulation results show that the proposed algorithm can approach the performance of ideal receiver closely, while the processing complexity is rather lower than the conventional detectors.

关键词： SAGE iterative receiver synchronization channel estimation

Allogenic tooth transplantation using 3D printing: A case report and review of the literature

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World Journal of Clinical Cases 2019年第17期7卷 2587-2596页

作者： Hu-Di Xu Richard J Miron xiao-xin zhang Yu-Feng zhang The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei- MOST) and Key Laboratory of Oral Biomedicine Ministry of Education Wuhan UniversityWuhan 430079Hubei ProvinceChina Department of Periodontology College of Dental MedicineNova Southeastern UniversityFort LauderdaleFL 33314-7796United States Department of Oral Implantology School of StomatologyWuhan UniversityWuhan 430079Hubei ProvinceChina

BACKGROUND The history of allogenic tooth transplantation can be traced back to the 16th *** there have been many successful cases,much needs to be better understood and researched prior to the technique being translated to everyday clinical *** SUMMARY In the present report,we describe a case of allogenic tooth transplantation between a mother and her *** first left maxillary molar of the mother was diagnosed with residual root resorption and needed to be *** 3rd molar of the daughter was used as a donor *** to transplantation,a 3D printing system was introduced to fabricate an individualized reamer drill specifically designed utilizing the donor’s tooth as a *** specific design of our 3D printed bur allowed for the recipient site to better match the donor *** the ability to 3D print in layers,even the protuberance of the root can be matched and 3D printed,thereby minimizing unnecessary bone *** Our study is a pioneering case combining 3D printing with allogenic tooth transplantation,which could be able to minimize unnecessary bone loss and improve the implant *** article aims to enhance our understanding of allogenic tooth transplantation and 3D printing,and may potentially lead to tooth transplantation being utilized more frequently - especially since transplantations are so commonly utilized in many other fields of medicine with high success rates.

关键词： Transplantation Allografts Dental implants 3D printing Case report

Homogeneity analysis of Y-bearing 12Cr ferritic/martensitic steel fabricated by vacuum induction melting and casting

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Journal of Iron and Steel Research International 2020年第8期27卷 940-951页

作者： Wei-wei Guo xiao-xin zhang Ying-xue Chen Zhi-yuan Hong Qing-zhi Yan Institute of Nuclear Materials School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China Advanced Energy Research Center Shenzhen UniversityShenzhen 518060GuangdongChina Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic EngineeringShenzhen UniversityShenzhen 518060GuangdongChina

Advanced oxide metallurgy technique was adopted to produce 100-kg Y-bearing 12Cr ferritic/martensitic steel via vacuum induction melting and casting route. Subsequently, nine specimens at top, middle and bottom regions of the sheet were char-acterized to evaluate the homogeneity of chemical composition, microstructure and mechanical properties. The small vibra-tion of hardness (200–220 HBW), ultimate tensile strength (672–678 MPa), yield strength (468–480 MPa), total elongation (26.2%–30.5%) and Charpy energy at room temperature (98–133 J) and at ??40 ℃ (12–40 J) demonstrated that mechanical properties’ homogeneity of Y-bearing steel was acceptable although slight Y segregation and inhomogeneous microstructure occurred at the bottom. Furthermore, the effect of Y content on microstructure characteristics and mechanical properties was explained and the comparison of failure mechanism for the dual-phase steel between tensile test (i.e., quasi-static loading) and Charpy test (i.e., dynamic loading) was discussed in detail.

关键词： Y-bearing ferritic/martensitic steel Casting Homogeneity Chemical composition Microstructure characteristics Mechanical property

Protective effects of soybean phospholipid liposome on glutamate-induced nerve cell injury in vitro

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Neural Regeneration Research 2007年第10期2卷 587-590页

作者： Jian ying xiao xin zhang Yu jie Liu Department of Biochemistry Liaoning Medical UniversityJinzhou 121001Liaoning ProvinceChina

It has been previously reported that soybean phosphatide could reduce the cerebral ischemia damage obviously. Whether soybean phospholipid liposome （SPL） can protect cerebral cortical neurons cultured in vitro from glutamate （Glu）-induced neurotoxicity, particularly nerve cell membrane damage has not been fully investigated. OBJECTIVE： To study the protective effects of SPL on Glu-induced neurotoxicity of neurons in culture, and to discuss the possible mechanisms of neuroprotection. DESIGN： Randomized controlled trial. SETTING： Department of Biochemistry, Liaoning Medical University. MATERIALS： Twelve Spragne-Dawley rats, of either gender, aged 0 to 1 day, were involved in this study. Drugs and reagents： poly-L-lysine and L-glutamate were purchased from Sigma company （USA）. METHODS： The study was carried out in the Department of Biochemistry of Jinzhou Medical University from November 2004 to June 2005. Glu （ 1 X 10^- 4 mol/L ） was added to cortical neurons in injury group for 3 hours, while different concentrations of SPL （0.2, 0.4, 0.8, 1.6 g/L） were added at the same time in the SPL groups. Neurons in the normal control group were untouched. MAIN OUTCOME MEASURES： According to the instruction of reagent kit, lactate dehydrogenase（LDH） activity and nitric oxide（NO） content in the supernatant fluid of the culture medium were assayed, and the activity of nitric oxide synthase （NOS） and superoxide dismutase（SOD）, malonaldehyde （MDA） content in the neurocytes were also determined. RESULTS： ①Activities of LDH and NOS, as well as NO content in the supernatant fluid of injury group were significantly higher than those of normal control group （P 〈 0.01）. Activities of LDH and NO S, and NO content in the supernatant fluid of SPL groups were significantly lower than those of injury group （P 〈 0.01）. ②MDA content of the SPL groups was significantly lower than that of injury group （P 〈 0.01）; SOD activity of neurons in the injury group was significantly lower than that in the

关键词： soybean phospholipid liposome glutamate nerve cell culture cerebral ischemia

Optimal activated carbon for separation of CO_2 from(H_2 + CO_2) gas mixture

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Petroleum Science 2018年第3期15卷 625-633页

作者： xiao-xin zhang Peng xiao Chang-Yu Sun Gen-Xiang Luo Jia Ju xiao-Rong wang Hao-Xuan wang Hao Yang College of Chemistry Chemical Engineering and Environmental Engineering Liaoning Shihua University Fushun 113001 China State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China

Seven types of activated carbon were used to investigate the effect of their structure on separation of CO2 from（H2 ＋ CO2） gas mixture by the adsorption method at ambient temperature and higher pressures. The results showed that the limiting factors for separation of CO2 from 53.6 mol% H2 ＋ 46.4 mol% CO2 mixture and from 85.1 mol% H2 ＋ 14.9 mol% CO2 mixture were different at 20 °C and about 2 MPa. The best separation result could be achieved when the pore diameter of the activated carbon ranged from 0.77 to 1.20 nm, and the median particle size was about2.07 lm for 53.6 mol% H2 ＋ 46.4 mol% CO2 mixture and 1.41 lm for 85.1 mol% H2 ＋ 14.9 mol% CO2 mixture. The effect of specific area and pore diameter of activated carbon on separation CO2 from 53.6 mol% H2 ＋ 46.4 mol% CO2 mixture was more significant than that from 85.1 mol% H2 ＋ 14.9 mol% CO2 mixture. CO2 in the gas phase can be decreased from 46.4 mol% to 2.3 mol%–4.3 mol% with a two-stage separation process.

关键词： Structure of activated carbon Characteristic optimization Separation H2 + C02 mixtures

Searching for Variable Stars in and around Open Clusters

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Chinese Journal of Astronomy and Astrophysics 2002年第6期2卷 481-486页

作者： Yu xin, xiao-Bin zhang and Li-Cai DengNational Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China

We present a snapshot-of our recent results of a variable star survey in 1 degree fields around three open clusters: NGC 188, NGC 7789 and M67. A total number of 39 variable stars are newly discovered, including 22 W ... 详细信息

关键词： open clusters : individual : NGC 188, NGC 7789 and M67 stars : variables