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Crystal Structure of Bis(O,O′-diisopropyl dithiophosphate): [(C_3H_7O)_2PS_2]_2

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Chemical Research in Chinese Universities 2004年第2期20卷 146-148页

作者： ZHANGShu-sheng liXue-mei WANGJin-li WANJun JIAOKui CollegeofChemistryandMolecularEngineering QingdaoUniversityofScienceandTechnologyQingdao266042P.R.China

The crystal and molecular structures of [(C 3H 7O) 2PS 2] 2(CCDC No.217201) were determined by means of X-ray crystallography. It crystallized in a triclinic system with space group P1 and lattice parameters a=0.82794(3) nm, b=0.84764(2) nm, c=0.85034(3) nm, α=97.78(3)°, β=110.77(3)°, γ=94.95(3)°, V=0.54701(9) nm3, Z=1. In this molecule, the two diisopropyl dithiophosphate groups, [(C 3H 7O) 2PS 2] 2, which are parallel to each other, are linked by an S—S bond and there exist inversion centers in the molecule. In the structure, the PS bonds in the two dithiophosphate units are trans-oriented to each other.

关键词： X-ray crystallography Dithiophosphate Centrosymmetry

Van der Pauw Hall Measurement on Intended Doped ZnO Films for p-Type Conductivity

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Chinese Physics Letters 2010年第6期27卷 171-174页

作者： GUO Yang liU Yao-Ping li Jun-Qiang ZHANG sheng-li mei Zeng-Xia DU Xiao-Long Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190

A Van der Pauw Hall measurement is performed on the intended doped ZnO films （Na doped ZnO） grown by using the molecular beam epitaxial method. All as-grown samples show n-type conductivity, whereas the annealed samples （annealing temperature 900℃） show ambiguous carrier conductivity type （n- and p-type） in the automatic Van der Pauw Hall measurement. A similar result has been observed in li doped ZnO and in as-doped ZnO films by other groups before. However, by tracing the Hall voltage in the Van der Pauw Hall measurement, it is found that this alternative appearance of both n- and p-type conductivity is not intrinsic behavior of the intended doped ZnO films, but is due to the persistent photoconductivity effect in ZnO. The persistent photoconductivity effect would strongly affect the accurate determination of the carrier conductivity type of a highly resistive intended doped ZnO sample.

关键词： Doping Sampling Films Packaging materials Measurement

Effects of low-dose long-term HRT on serum lipids in postmenopausal women

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生殖医学杂志 2004年第Z1期13卷 71-74页

作者： Song Yao-hong sheng Ying Sun mei-li Ge Qin-sheng Department of Clinical Laboratories Department of Clinical Laboratories Department of Endocrinology Department of Obstetrics & Gynecology Peking Union Medical College (PUMC) Hospital Chinese Academy of Medical Science PUMC Beijing 100730 China

Objective: To study the effects of low-dose and long-term hormone replacement therapy (HRT) on blood lipids in postmenopausal ***: (1) 141 postmenopausal female medical staffs aged from 50 to 87 years with average 68 years were from Peking Union Medical college Hospital, among them 63 were treated with low-dose HRT for 5-31 years as HRT group, and other 78 postmenopausal women matched with age as the control group. (2) withdrew vein blood from objects on fasting for 12-14 h and serum was separated for determining serum concentration of lipid, lipoprotein and apolipoprotein. (3)data were analyzed with SPSS statistical software for statistical significance by P＜***:In comparison with control, the levels of TG, HDL-C, LDL-C, apoA I , Lp(a) of HRT group had no statistical significance,but the levels of TC, TC/HDL-C, ApoE, ApoCⅢ and ApoB were significantly ***: The levels of TC, LDL-C, ApoB, ApoC Ⅲ, ApoE decreased significantly in postmenopausal women receiving low-dose and long-term HRT. The decrease in the levels of blood lipids may provide cardiovascular protection and reduce the risk of cardiovascular events.

关键词： lipid Hormone replacement therapy Postmenopausal women

Neutron yields and emission rates in the forward direction for 50 MeV/u 18O-ion on thick Be,Cu,Au targets

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Nuclear Science and Techniques 1997年第4期 47-50页

作者： li Gui sheng, Zhang Tian mei, li Zong Wei, Su You Wu and Zhang Shu Min ( Institute of Modern Physics, the Chinese Academy of Sciences, Lanzhou 730000)

Ｎｅｕｔｒｏｎｙｉｅｌｄｓａｎｄｅｍｉｓｉｏｎｒａｔｅｓｉｎｔｈｅｆｏｒｗａｒｄｄｉｒｅｃｔｉｏｎｆｏｒ５０ＭｅＶ／ｕ１８ＯｉｏｎｏｎｔｈｉｃｋＢｅ，Ｃｕ，ＡｕｔａｒｇｅｔｓＬｉＧｕｉＳｈｅｎｇ，ＺｈａｎｇＴｉ... 详细信息

Ｎｅｕｔｒｏｎｙｉｅｌｄｓａｎｄｅｍｉｓｉｏｎｒａｔｅｓｉｎｔｈｅｆｏｒｗａｒｄｄｉｒｅｃｔｉｏｎｆｏｒ５０ＭｅＶ／ｕ１８ＯｉｏｎｏｎｔｈｉｃｋＢｅ，Ｃｕ，ＡｕｔａｒｇｅｔｓＬｉＧｕｉＳｈｅｎｇ，ＺｈａｎｇＴｉａｎＭｅｉ，ＬｉＺｏｎｇＷｅｉ...

关键词： Threshold detector Neutron activation Heavy ion reactions Neutron yield Neutron emission rate

Neutron dose equivalent rate for heavy ion bombardment

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Nuclear Science and Techniques 1998年第3期 17-19页

作者： li Gui sheng, Zhang Tian mei, li Zong Wei, Su You Wu and Zhang Shu Min ( Institute of Modern Physics, the Chinese Academy of Sciences,Lanzhou 730000)

１ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｅｘａｃｔｄｏｓｅｅｑｕｉｖａｌｅｎｔｍｅａｓｕｒｅｍｅｎｔｏｆｎｅｕｔｒｏｎｓｗｉｔｈｅｎｅｒｇｙｇｒｅａｔｅｒｔｈａｎ１４ＭｅＶｉｓａｒａｔｈｅｒｄｉｆｉｃｕｌｔｐｒｏｂｌｅｍｉｎ... 详细信息

１ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｅｘａｃｔｄｏｓｅｅｑｕｉｖａｌｅｎｔｍｅａｓｕｒｅｍｅｎｔｏｆｎｅｕｔｒｏｎｓｗｉｔｈｅｎｅｒｇｙｇｒｅａｔｅｒｔｈａｎ１４ＭｅＶｉｓａｒａｔｈｅｒｄｉｆｉｃｕｌｔｐｒｏｂｌｅｍｉｎｒａｄｉａｔｉｏｎｐｒｏｔｅｃｔｉ...

关键词： Heavy ion reactions 18 O ion Neutrondose equivalent rate

Effects of acetazolamide and anordiol on osmotic water permeability in AQP1-cRNA injected Xenopus oocyte

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Acta Pharmacologica Sinica 2004年第1期 92-99页

作者： Bing MA, Yang XIANG, sheng-mei MU, Tao li, He-ming YU, Xue-jun liDepartment of Pharmacology, School of Basic Medical Sciences, Peking University, Beijing 100083 National Research Institute for Family Planning, Beijing 100081, China

AIM: To study the effects of acetazolamide and anordiol on osmotic water permeability in aquaporin 1 (AQP1)-cRNA injected Xenopus oocyte and their mechanisms. METHODS: AQP1 gene constructed in pBluescript was transcripted into cRNA in vitro and then the cRNA was injected in Xenopus oocytes. The effects of acetazolamide and anordiol on the water transport function of AQP1 were observed by assaying the osmotic swelling of oocytes. In addition, their effects on protein expression of AQP1 were quantitatively investigated by Western blotting method. RESULTS: After incubation for 15 min or 72 h, acetazolamide, a carbonic anhydrase inhibitor, equally reduced the water permeability of AQP1-cRNA injected oocyte in a dose-dependent manner. After incubation for 72 h, anordiol, an antiestrogen with partial estrogenic activity, reduced the osmotic water permeability dose dependently as well; however, no discernable action was observed after incubation with anordiol for 15 min. The Western blotting

关键词： aquaporins acetazolamide anordiol permeability Xenopus

Microstructural evolution during the progressive transformation-induced plasticity effect in a Fe-0.1C-5Mnmedium manganese steel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 369-379页

作者： mei Zhang Wenhao li Yangfei Chen Yang Jiang Xiaofei Guo Han Dong School of Materials Science and Engineering Shanghai UniversityShanghai 200444China State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai 200444China

The microstructural evolution of a cold-rolled and intercritical annealed medium-Mn steel(Fe-0.10C-5Mn)was investigated during uniaxial tensile ***-situ observations under scanning electron microscopy,transmission electron microscopy,and X-ray diffraction analysis were conducted to characterize the progressive transformation-induced plasticity process and associated fracture initiation *** findings were discussed with the local strain measurements via digital image *** results indicated that Lüders band formation in the steel was limited to 1.5%strain,which was mainly due to the early-stage martensitic phase transformation of a very small amount of the less stable large-sized retained austenite(RA),which led to localized stress concentrations and strain hardening and further retardation of *** small-sized RA exhibited high stability and progressively transformed into martensite and contributed to a stably extended Portevin-Le Chatelier *** volume fraction of RA gradually decreased from 26.8%to 8.2%prior to *** the late deformation stage,fracture initiation primarily occurred at the austenite/martensite and ferrite/martensite interfaces and the ferrite phase.

关键词： medium-Mn steel retained austenite progressive transformation-induced plasticity effect local strain fracture initiation

Clinical and experimental study of therapeutic effect of Weixibaonizhuan pills on gastric precancerous lesions

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World Journal of Gastroenterology 1998年第1期4卷 29-32页

作者： ZHANG XuChen1, GAO RuiFeng2, li BingQing2, MA liansheng3, mei liXin1, WU YuZhen2, liU FengQin2 and liao Zhenglin2

IMS To observe the therapeutic effect of Weixibaonizhuan pills on gastric precancerous lesions.METHODS Thirty patients with gastric precancerous lesions were treated with Weixibaonizhuan pills for 3 months. Of the 36 cases, 13 (361%) were mild atrophic gastritis, 14 (389%) moderate atrophic gastritis and 9 (250%) severe atrophic gastritis; among them 22 (611%) and 27 cases (750%) were accompanied with intestinal metaplasia (IM) and dysplasia (DYS) respectively. Of the 36 patients, 20 were men and 16 women, aged from 30-60 years and those aged 30-59 years accounted for 611%. The course of disease ranged from 3 months to 21 years, and 20 (556%) of them had a course of 5-10 years. The clinical manifestations were fullness of the abdomen (31 cases), abdominalgia (27 cases), anorexia (30 cases), gas eructation (26 cases), acid regurgitation (6 cases) and loose stool (9 cases). When treatment ended, the improvement of patients′ clinical symptoms, atrophy of gastric mucosa, IM and DYS were analysed.RESULTS After 3 months′ treatment with Weixibaonizhuan pills, 7 cases recovered, 11 cases were much improved, 13 cases showed some improvement, and 5 cases were ineffective; the total rate of symptomatic improvement was 861%. Of the 13 cases with mild atrophic gastritis, 11 cases changed into superficial gastritis, and 2 cases had no changes. Of the 14 cases of moderate atrophic gastritis, 4 cases changed into superficial gastritis, 7 cases changed into mild atrophic gastritis, and 3 cases had no changes. Five of 9 cases of severe atrophic gastritis were reduced to moderate atrophic gastritis, and 4 cases had no changes. The total effective rate was 778% in chronic atrophic gastritis. Of the 9 cases with mild IM, IM disappeared in 6 cases and 3 showed no change. Of the 10 cases with moderate IM, it disappeared in 2 cases, 5 cases changed to mild IM, and 3 cases had no change. One of the 4 cases of severe IM changed to moderate IM and 3 had no change. The tota

关键词： eixibaonizhuan pills stomach neoplasm/TCM therapy precancerous conditions gastric mucosa Chinese herbal

MixerKT:A Knowledge Tracing Model Based on Pure MLP Architecture

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Computers, Materials & Continua 2025年第1期82卷 485-498页

作者： Jun Wang Mingjie Wang Zijie li Ken Chen Jiatian mei Shu Zhang Key Laboratory of Education Informatization for Nationalities Ministry of EducationYunnan Normal UniversityKunming650000China Yunnan Key Laboratory of Smart Education Yunnan Normal UniversityKunming650000China

In the field of intelligent education,the integration of artificial intelligence,especially deep learning technologies,has garnered significant *** tracing(KT)plays a pivotal role in this field by predicting students’future performance through the analysis of historical interaction data,thereby assisting educators in evaluating knowledgemastery and tailoring instructional *** knowledge tracingmethods,largely based on Recurrent Neural Networks(RNNs)and Transformer models,primarily focus on capturing long-term interaction patterns in sequential ***,these models may neglect crucial short-term dynamics and other relevant *** paper introduces a novel approach to knowledge tracing by leveraging a pure Multilayer Perceptron(MLP)*** proposeMixerKT,a knowledge tracing model based on theHyperMixer framework,which uniquely integrates global and localMixer feature *** architecture enables more effective extraction of both long-terminteraction trends and recent learning behaviors,addressing limitations in currentmodels thatmay overlook these key *** evaluations on twowidely-used datasets,ASSIS Tments2009 and Algebra2005,demonstrate that MixerKT consistently outperforms several state-of-the-art models,including DKT,SAKT,and Separated Self-Attentive Neural Knowledge Tracing(SAINT).Specifically,MixerKT achieves higher prediction accuracy,highlighting its effectiveness in capturing the nuances of learners’knowledge *** results indicate that our model provides a more comprehensive representation of student learning patterns,enhancing the ability to predict future performance with greater precision.

关键词： Knowledge tracing multilayer perceptron channel mixer sequence mixer