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厂区布置对钢塔自然通风空冷凝汽器性能的影响

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汽轮机技术 2024年第4期66卷 279-282页

作者：石磊汪建平余喆沈栋张丽北京交通大学土建学院北京100044 江苏双良冷却系统有限公司江阴214444

利用计算传热学(NHT)软件FLUENT,在自然通风状态下,对2×350MW机组钢结构外覆铝板冷却塔及直接空冷凝汽器(DACC)的流动和换热性能进行了数值模拟、分析和研究。确定了考核工况,不同环境风向下,周边建筑物对DACC和钢塔性能的影响。结果表... 详细信息

利用计算传热学(NHT)软件FLUENT,在自然通风状态下,对2×350MW机组钢结构外覆铝板冷却塔及直接空冷凝汽器(DACC)的流动和换热性能进行了数值模拟、分析和研究。确定了考核工况,不同环境风向下,周边建筑物对DACC和钢塔性能的影响。结果表明,两机一塔水平矩形布置方式下,平行于A列的来风对钢塔通风和DACC换热有负面影响。不考虑风向频率时,各风向下周边建筑物对DACC总体换热影响约为2.4%。在电厂总平面布置时,应尽量使厂区主导风向避开不利风向,汽机房空冷塔间距还需综合其它因素确定。

关键词：直接空冷凝汽器钢塔布置方式自然通风数值模拟

Synthesis and Crystal Structure of Chiral 4-Hydroxy-4-butyrolactam Fused Aziridine

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Chinese Journal of Structural Chemistry 2008年第2期27卷 133-136页

作者： wang jian-ping wang jian-Ge FU Yong-Ju LI Ying-Fei Department of Chemistry Luoyang Normal University Luoyang 471022 China Chemical Engineering ＆ Pharmaceutics College Henan University of Science and Technology Luoyang 471003 China

A novel compound of chiral 4-hydroxy-4-butyrolactam fused aziridine was synthesized via tandem nucleophilic displacement reaction under mild condition. Its structure was determined by IR, 1H NMR, elemental analysis and X-ray diffraction. The crystal of the new compound is of orthorhombic, space group P212121 with a = 6.4246（6）, b = 13.5081（13）, c = 18.6399（18） A, Mr = 278.39, Z = 4, V = 1617.6（3）A^3, Dc = 1.143 g/cm^3, p（MoKa） = 0.075 mm^-1, F（000） = 608, the final R = 0.0297 and wR = 0.0679.

关键词： butyrolactam aziridine asymmetric synthesis crystal structure

Asymmetric Synthesis and Crystal Structure of a Bioactive Morpholine Derivative

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Chinese Journal of Structural Chemistry 2007年第5期26卷 515-518页

作者： wang jian-ping FU Yong-Ju wang jian-Ge QIN jian-Hua CHEN Qing-Hua Department of Chemistry Luoyang Normal University Luoyang 471022China Chemical Engineering ＆ Pharmaceutics College Henan Universityof Science and Technology Luoyang 471003 China

A novel morpholine derivative was synthesized by Michael addition/internal nucleophilic substitution of 4-（L）-menthyloxy（1R,2S,5R）-butenolide with phenyl-glyalcohol under mild condition, and its structure was determined by X-ray diffraction. The target compound belongs to orthorhombic, space group P212121 with a = 5.7729（7）, b = 11.5032（14）, c = 25.161（3）A, Mr = 319.35, Z = 4, V = 1670.8（4）A^3, Dc = 1.270 g/cm3, μ（MoKα） = 0.094 mm^-1, F（000） = 680, Flack = 0.01（2）, R = 0.0398 and wR = 0.0914.

关键词： morpholine derivative α-phenyl-glyalcohol,4-(L)-menthyloxy-butenolide asymmetric synthesis

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沸石膜用于BDO副产丁醇脱水的中试研究

现代化工 2024年第S2期44卷 386-390页

作者：程晋曦薛明明王建平文婷合肥江新化工科技有限公司安徽合肥230601 三菱化学(中国)管理有限公司上海200030

为了解决现有1,4-丁二醇(BDO)装置副产丁醇回收的问题,设计了一套沸石膜丁醇脱水中试样机,并进行了中试研究。中试采用循环脱水的操作方式,在丁醇水溶液循环流量为500 kg/h、膜管外侧压力约为0.5 MPaG(表压)、内侧压力约为10 kPaA(绝对... 详细信息

为了解决现有1,4-丁二醇(BDO)装置副产丁醇回收的问题,设计了一套沸石膜丁醇脱水中试样机,并进行了中试研究。中试采用循环脱水的操作方式,在丁醇水溶液循环流量为500 kg/h、膜管外侧压力约为0.5 MPaG(表压)、内侧压力约为10 kPaA(绝对压力)的条件下,考察了温度从90℃到130℃时ZEBREX^(TM)ZX0和ZEBREX^(TM)ZX2两种型号沸石膜的丁醇脱水性能,结果表明,随着操作温度和含水率的升高,沸石膜通量会升高,最佳操作温度为130℃,最大膜通量为12.45 kg/(m^(2)·h);在中试条件下,水与丁醇的分离因子>3900,ZX0和ZX2膜都对水和丁醇有较好的分离效果。沸石膜脱水技术在BDO装置副产丁醇回收上的应用是可行的。

关键词：沸石膜脱水膜分离 BDO副产丁醇丁醇脱水丁醇回收

Finite Spectral Semi-Lagrangian Method for Incompressible Flows

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Chinese Physics Letters 2012年第2期29卷 122-125页

作者： LI Shao-Wu wang jian-ping State Key Laboratory on Turbulence and Complex System and Department of Mechanics and Aerospace EngineeringCollege of EngineeringPeking UniversityBeijing 100871

A new semi-Lagrangian (SL) scheme is proposed by using finite spectral regional interpolation and adequate numerical dissipation to control the nonlinear *** finite spectral basis function is C1 continuous at the boundary and is easy to *** between numerical and experimental results indicates that the present method works well in solving incompressible Navier-Stokes equations for unsteady flows around airfoil with different angles of attack.

关键词： finite unsteady interpolation

灌溉与有机肥处理对冬小麦水分利用效率的影响

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中国土壤与肥料 2024年第3期 144-152页

作者：李斌宿顺顺冯浩吴淑芳胡亚瑾王建平西北农林科技大学水利与建筑工程学院陕西杨凌712100 北京良乡蓝鑫水利工程设计有限公司北京102488 延安市宝塔区果业局陕西延安716000

探究不同灌溉量和有机无机肥配施的组合处理对冬小麦生长及水分利用效率的影响,为冬小麦的科学施肥管理提供参考。以关中地区冬小麦‘小偃22’为研究对象,通过田间试验,采用等氮原则对有机肥与无机肥进行不同比例配施(F1,100%无机肥;F2,... 详细信息

探究不同灌溉量和有机无机肥配施的组合处理对冬小麦生长及水分利用效率的影响,为冬小麦的科学施肥管理提供参考。以关中地区冬小麦‘小偃22’为研究对象,通过田间试验,采用等氮原则对有机肥与无机肥进行不同比例配施(F1,100%无机肥;F2,24%有机肥+76%无机肥;F3,48%有机肥+52%无机肥),结合2个水平的灌溉(充分灌溉W1和亏缺灌溉W2),共设计6个灌溉施肥组合处理(W1F1、W1F2、W1F3、W2F1、W2F2和W2F3)。通过测定冬小麦的生长指标(植株株高和叶面积指数)、0~200 cm土层土壤体积含水率(以20 cm为深度间隔)和小麦的产量及构成要素(干物质量、穗长、有效穗数、千粒质量和籽粒产量),分析灌水量与有机无机肥配施对冬小麦生长及水分利用效率(WUE)的影响。结果表明:(1)充分灌溉(W1)条件下,F2、F3处理株高较F1处理分别提高3.4%~21.2%和0.8%~15.9%,叶面积指数提高5.7%~18.5%和16.8%~47.4%,干物质量提高12.1%~26.1%和21.1%~36.0%,穗长提高12.5%和14.5%,有效穗数提高6.6%和9.3%,千粒质量提高18.3%和24.4%,籽粒产量提高14.8%和28.6%,WUE提高14.6%和27.5%;亏缺灌溉(W2)条件下,与F1处理相比,F2、F3处理株高分别提高8.5%~16.2%和0.5%~10.6%,叶面积指数提高4.9%~20.7%和17.0%~50.0%,干物质量提高7.7%~25.7%和15.0%~34.6%,穗长提高12.3%和18.5%,有效穗数提高7.4%和18.0%,千粒质量提高15.3%和25.1%,籽粒产量提高13.1%和31.8%,WUE提高21.4%和35.2%。在相同灌溉水平下,有机无机肥配施处理可以提高土壤体积含水率。(2)W2F2处理对冬小麦株高增长最有效,灌浆期达最大值,较W1F1处理增长10.4%;W2F3处理对冬小麦叶面积指数、干物质量、穗长、有效穗数、千粒质量影响最大,成熟期较W1F1处理分别提高23.6%、39.0%、20.3%、18.4%和33.1%。(3)W2F3处理对冬小麦籽粒产量和WUE的影响最为显著,W1F1、W1F2、W1F3、W2F1和W2F2处理籽粒产量分别提高了35.5%、18.0%、5.3%、31.8%和16.6%;W1F1、W1F2、W1F3、W2F1和W2F2处理WUE分别提高了52.6%、33.2%、19.7%、35.2%和21.4%。亏缺灌溉与48%有机肥+52%无机肥组合处理的冬小麦籽粒产量和WUE最高,该灌溉施肥管理方案为关中平原及环境相似地区冬小麦的科学施肥管理提供了科学依据。

关键词：亏缺灌溉有机无机肥配施冬小麦产量水分利用效率

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Synthesis and Molecular Structure of Acetic Acid-3,5-diacetoxy-2-acetoxymethyl-6-(4-quinoxalin-2-yl-phenoxy)-tetrahydro-pyran-4-yl-ester

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Chinese Journal of Structural Chemistry 2006年第8期25卷 1014-1018页

作者： WEI Hui-Qin ZENG Run-Sheng WU Gui-ping wang Bao-An ZOU jian-ping Key Laboratory of Organic Synthesis of jiangsu Province College ofChemistry and Chemical Engineering Suzhou University Suzhou 215123 China

The title compound, acetic acid-3,5-diacetoxy-2-acetoxymethyl-6-（4-quinoxalin- 2-yl-phenoxy）-tetrahydro-pyran-4-yl-ester 8 （C28H28N2O10, Mr = 552.54）, has been synthesized and its crystal structure was determined by X-ray diffraction analysis. It crystallizes in monoclinic, space group P21, a = 10.060（8）, b = 5.648（4）, c = 24.11（2）A, β = 91.078（10）°, Z = 2, V= 1369.9（19）A^3, Dc = 1.339 g/cm^3,μ（MoKa） = 1.03 cm^-1, F（000） = 580.00, T =. 193.1 Kx-9 θmax = 25.03, （△/σ）max = 0.0000, Flack = -0.0（24）, the final R = 0.0680 and wR = 0.140 （w = 1/[0.0016Fo^2 ＋ 1.00000（Fo^2）]/（4Fo^2）） for 3126 observed reflections （1 〉 20（/））. The pyranoid ring adopts chair conformation in the sugar moiety, and all of the acetyl groups are in the e bond of the pyranoid ring, so the sugar moiety is very stable.

关键词： acetic acid-3 5-diacetoxy-2-acetoxymethyl-6-(4-quinoxalin-2-yl-phenoxy)-tetrahydro-pyran-4-yl-ester synthesis crystal structure

The Problem of Stabilization for Dynamical Systems

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Chinese Quarterly Journal of Mathematics 2006年第1期21卷 80-84页

作者： ZHANG Zhi-ping wang jian-ping College of Mathematics and Information Science Henan University Kaifeng 475001 China Institute of Applied Mathematics Henan University Kaifeng 475001 China

In this papery we are concerned with the problem of stabilization for autonomous dynamical systems. We use theories in Liapunov stability and Lasalle stability theory and show that system （H） is stabilizable.

关键词： stabilization stabilizable asymptotes stability Fréchet derived operator equilibrium point

Melanoma differentiation-associated gene-7, MDA-7/IL-24, selectively induces growth suppression, apoptosis in human hepatocellular carcinoma cell line HepG2 by replication-incompetent adenovirus vector

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World Journal of Gastroenterology 2006年第11期12卷 1774-1779页

作者： Cong-Jun wang Xin-Bo Xue Ji-Lin Yi Kun Chen jian-WeiZheng jian wang jian-ping Zeng Rong-Hua Xu Department of Biliary and Pancreatic Surgery Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 Hubei Province China

AIM： To investigate the effect of replication-incompetent adenovirus vector expressing MDA-7/IL-24 on tumor growth and apoptosis in human hepatocellular carcinoma （HCC） cell line HepG2 and normal liver cell line L02. METHODS： We constructed the recombinant replication-incornpetent ***-7 virus vector and infected it into the human HCC cell line HepG2 and normal liver cell line L02. RT-PCR was performed to detect the rnRNA expressing in cells, by ELISA was used to detect MDA-7/IL-24 protein expression in the culture supernatant. The effect of apoptosis induced by ***-7 was confirmed by Hoechst staining and flow cytometry assay with Annexin-V and PI staining. MTT assay was used to determine growth inhibition of HepG2 cells, and cell-cycle and hypodiploidy analyses were performed by flow cytometry. RESULTS： Recombinant replication-defective virus expressing MDA-7/IL-24 was constructed successfully. RTPCR showed that the ***-7 could mediate the expression of the exogenous gene MDA-7/IL-24 into HepG2 and L02. The concentration of MDA-7/IL-24 protein in supernatant was 130 pg/mL and 110 pg/mL in ***-7-infected L02 and HepG2 ceils, respectively. ***-7 infection obviously induced apoptosis （from 2.604±0.72% to 33.64±13.2%, P=0.00012） and growth suppression in HepG2 （inhibition ratio IR=68%） and an increase in the percentage of specific cancer cell types at the G2/M phase of the cell cycle （from 6.44% to 32.29%, P〈 0.01）, but not in L02 ***： These results confirm selectively induction of apoptosis and growth suppression by the mda-7/ IL-24 gene with replication-incompetent adenovirus vector in human hepatocellular carcinoma cell line HepG2.

关键词： Cancer gene therapy Hepatocellular carcinoma (HCC) Apoptosis Growth suppression MDA-7/IL-24