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A Promising MoO_x-based Catalyst for n-Heptane Isomerization

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Chinese Chemical Letters 2003年第7期14卷 748-751页

作者： Song Hai CHAI Xin Ping WANG Ying Jun WANG tian Xi cai State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalian 116012

The SiO2 and g-Al2O3 supported MoOx catalyst and a MoOx-SiO2 catalyst have been studied in a conventional fixed-bed flow reactor for n-alkanes isomerization. It is shown that the MoOx-SiO2 catalyst with SiO2 framework, in which the bulk MoOx phase is large enough to form typical mesoporous structure, is promising in terms of its advantages of both improved mechanical strength and high catalytic properties over the supported MoOx and bulk MoOx catalyst.

关键词： n-Heptane isomerization molybdenum oxides SiO2 mesopore MoOx-based.

Application of the catastrophe progression method in predicting coal and gas outburst

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Mining Science and Technology 2009年第4期19卷 430-434页

作者： ZHANG tian-jun REN Shu-xin LI Shu-gang ZHANG tian-cai XU Hong-jie College of Science Xi＇ an University of Science and Technology Xi＇an Shaanxi 710054 China Energy Institute Xi＇an University of Science and Technology Xi＇an Shaanxi 710054 China Xinjiang Times Petroleum Engineering Corporation Karamay Xinjiang 834000 China

Based on catastrophe theory,we used the catastrophe progression method to predict the risk of coal and gas outbursts in coal *** to the major factors affecting coal and gas outbursts,we built a comprehensive evaluation index system and a coal and gas outburst prediction *** addition,we performed a standard transformation for each index system;based on the degree the various indices affect the risk of an outburst,to make the data *** on the outburst data from eight mines,we determined catastrophe progression values and verified these *** results show that:1) converting multi-dimensional problems into one-dimensional problems using this catastrophe progression method can simplify the steps of predicting coal and gas outbursts;2) when pre-determined catastrophe progression values are used to predict coal and gas outbursts,the predicting accuracy rate can be as high as 87.5%;3) the various coal mines have different factors inducing outbursts with varying importance of these factors and 4) the catastrophe progression values,calculated based on these factors,can be used effectively to predict the risk of outbursts in coal mines.

关键词： standard transformation catastrophe progression method coal and gas outburst

Statin treatment for unruptured intracranial aneurysms study: a study protocol for a double-blind, placebocontrolled trial

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Stroke & Vascular Neurology 2020年第4期5卷 410-415页

作者： Wenqiang Li Yisen Zhang Zhongbin tian Wei Zhu Jian Liu Ying Zhang Xinjian Yang De-cai tian Department of Interventional Neuroradiology Beijing Neurosurgical Institute and Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Department of Neurology Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Advanced Innovation Center for Human Brain Protection Capital Medical UniversityBeijingChina China National Clinical Research Center for Neurological Diseases BeijingChina

background and purpose A large proportion of patients with unruptured intracranial aneurysm(IA)are not suitable for surgical clipping and endovascular *** these patients,anti-inflammatory medications are worth exploring due to inflammation of aneurysmal wall being a major factor in higher risk of *** has been proven to reduce inflammation of atherosclerosis and maybe a suitable *** study aimed to evaluate whether atorvastatin will reduce inflammatory of the aneurysm wall measured by the signal index of aneurysm wall *** and analysis The Statin Treatment for UnruptureD Intracranial anEurysms Study is a single-centre,phase 2,randomised,controlled,double-blind clinical trial.60 patients with unruptured IAs with aneurysm wall enhancement will be enrolled in Beijing tiantan *** patients will be randomised to receive atorvastatin 20 mg or placebo orally per day for 12 *** primary outcome will be the change in aneurysm wall enhancement measured by the signal index during the 12 months treatment with *** secondary study outcomes will be the change in aneurysm wall enhancement measured by the signal index at 3 months,the changes in aneurysmal morphology and inflammation-related factors(C reactive protein,tumour necrosis factor-α,interleukin-1βand interleukin-6)at 3 and 12 *** study is the first to explore the role of atorvastatin in reducing inflammation in unruptured IA,which could lay the groundwork for future phase III *** and dissemination Beijing tiantan Hospital’s Ethics committee approved the research and written informed consents would be obtained from all participant or representative included in this study.

关键词： aneurysm inflammation placebo

Extending the trapping lifetime of single atom in a microscopic far-off-resonance optical dipole trap

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Frontiers of physics 2011年第3期6卷 262-270页

作者： Jun HE Bao-dong YANG Yong-jie CHENG tian-cai ZHANG Jun-min WANG State Key Laboratory of Quantum Optics and Quantum Optics Devices and Institute of Opto Electronics Shanxi University Taiyuan 030006 China

In our experiment, a single cesium atom prepared in a large-magnetic-gradient magneto optical trap （MOT） can be efficiently transferred into a 1064-nm far-off-resonance microscopic optical dipole trap （FORT）. The efficient transfer of the single atom between the two traps is used to determine the trapping lifetime and the effective temperature of the single atom in FORT. The typical trapping lifetime has been improved from ~ 6.9 s to ~ 130 s by decreasing the background pressure from 1 × 10^-10 Torr to ~ 2 × 10^-11 Torr and applying one-shot 10-ms laser cooling phase. We also theoretically investigate the dependence of trapping lifetimes of a single atom in a FORT on trap parameters based on the FORT beam＇s intensity noise induced heating. Numerical simulations show that the heating depends on the FORT beam＇s waist size and the trap depth. The trapping time can be predicted based on effective temperature measurement of a single atom in the FORT and the intensity noise spectra of the FORT beam. These experimental results are found to be in agreement with the predictions of the heating model.

关键词： magneto optical trap (MOT) far-off-resonance optical dipole trap (FORT) singleatom trapping lifetime release-and-recapture method (R&R) effective temperature

Generation of Intensity Squeezing in Laser Diodes by Weak External Cavity Feedback

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Chinese Physics Letters 1996年第10期13卷 734-736页

作者： ZHANG tian-cai HOU Zhan-jia WANG Jun-min XIE Chang-de PENG Kun-chi Institute of Opto-Electronics Shanxi UniversityTaiyuan 030006

We report the generation of intensity squeezing in a single-mode laser diode by weak external cavity feedback. The measurable squeezing of the output beam is 4.7%, corrected to 8.9% for the actual squeezing. This prov... 详细信息

关键词： measurable squeezing corrected

Berberine enhanced antidiabetic effects and attenuated untoward effects of canagliflozin in streptozotocininduced diabetic mice

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中国药理学与毒理学杂志 2016年第10期30卷 1058-1059页

作者： JIANG Xin tian cai-ming XIE Wei-dong School of Life Sciences Tsinghua University Shenzhen Key Lab of Health Science and Technology Division of Life Science & HealthGraduate School at Shenzhen Tsinghua University Department of Chemistry Tsinghua University

OBJECTIVE To determine whether berberine can enhance the antidiabetic effects and alleviate the adverse effects of canagliflozin in diabetes *** Streptozotocin-induced diabetic mice were introduced,and the combined effects of berberine and canagliflozin on glucose metabolism and kidney functions were *** Berberine combined with canagliflozin(BC)increased reduction of fasting and postprandial blood glucose,diet,and water intake compared with berberine or canagliflozin ***,BC showed greater decrease in blood urea nitrogen and creatinine levels and lower total urine glucose excretion than canagliflozin *** addition,BC showed increased phosphorylated 5′AMP-activated protein kinase(pA MPK)expression and decreased tumor necrosis factor alpha(TNFα)levels in kidneys compared with berberine or canagliflozin *** These results indicated that BC is as tronger antidiabetic than berberine or canagliflozin alone with less negative side effectson the kidneys of diabetic *** antidiabetic effect is likely mediated by synergically promoting the expression of p AMPK and reducing the expression of TNFαin *** study first proved that canagliflozin combined withberberine is apromising treatment for diabetes ***,the exact mechanisms should be further investigated in future studies.

关键词： canagliflozin berberine diabetes mellitus AMP-activated protein kinase sodium-glucose cotransporter-2

Fault-Tolerant Routing Algorithm for Network-on-Chip Based on Dynamic XY Routing

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Wuhan University Journal of Natural Sciences 2009年第4期14卷 343-348页

作者： LI Xiaohui CAO Yang WANG Liwei cai tian School of Electronic Information Wuhan University Wuhan430072 Hubei China State Key Laboratory of Software Engineering WuhanUniversity Wuhan 430072 Hubei China

In order to ensure the reliability of network-on-chip （NoC） under faulty circumstance, a dynamic fault tolerant routing algorithm is proposed. This algorithm can implement detour routing when there are both static and dynamic permanent faults in the network. That means the packet is able to move around the fanlts to the destination with a non-minimum path. In addition, the multi-level congestion control mechanism gives the algorithm the ability to distribute the load over the whole network and to avoid hotspots around the faults. Simulation results demonstrate the advantage of the proposed routing algorithm in terms of average packet latency and packet loss rate compared with negative-first routing algo- rithm and DyAD routing algorithm in the presence of permanent faults. For the proposed algorithm, it can get much less average packet latency and lead to less than 20% packet loss rate.

关键词： network-on-chip (NoC) fault-tolerant routing algo- rithm congestion control

Transalkylation of N-methyl tertiary amines with 3,4-dibromobutenolides

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Chinese Chemical Letters 2013年第9期24卷 837-839页

作者： Meng-Xue Wei Xiao-Hui Gao tian-cai Li Chun-An Fan Xue-Qiang Li State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University School of Chemistry and Chemical Engineering Ningxia University

The selective transalkylation of N-methyl tertiary amines with 3,4-dibromobutenolides is described. The N-methyl group of the parent tertiary amines was replaced by alkenyl units of the butenolides; and a series of butenolide-containing tertiary enamines were obtained in moderate to good yields. Interestingly, the product 2b has shown a promising anticancer activity against HeLa cell lines （IC50 = 0.19μmol/L）.

关键词： Amination Enamines Butenolides Tertiary amine Transalkylation

High Activity and Selectivity of Cu/SiO_2 Catalyst for the Direct Synthesis of Indole

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Chinese Chemical Letters 2002年第3期13卷 211-212页

作者： Lei SHI Jun Ming SUN Xin Ping WANG Xan Yun SU tian Xi cai State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalian 116012

Copper supported over silica exhibited very high activity and selectivity for the direct synthesis of indole at atmospheric pressure. Under the reaction temperature of 325C,the yield of indole could obtain 88%.

关键词： Cu/SiO2 catalyst direct synthesis of indole aniline ethylene glycol.