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Rare Metals 2012年第5期31卷 466-469页

作者： wang dahui XIA Jihong ZHANG Sha Key Laboratory of Non-ferrous Metal Alloys and Processing of Ministry of Education Lanzhou University of Science and Technology Lanzhou 730050 China

Sol-gel technology was employed to synthesize nanosized precursors of La-Mg hydrogen storage alloy at different pH values (0.5, 1.5, 8.0 and 9.0) of reaction solution. The effect of pH value on microstructure of the nano precursors of La-Mg hydrogen storage alloy was studied by infrared radiation (IR), thermo-gravimetric and differential thermal analysis (TG/DTA), X-ray diffraction analyzer (XRD) and transmission electron microscopy (TEM). IR results indicate that the chelating agent, citric acid, is not fully ionized, and carboxyl groups are not entirely used to complex metal ions in acidic solutions. The efficiency of complexing metal ions is enhanced in basic solutions. TG/DTA results show that the combustion may take place with low rate of the flame propagation that causes the longer combustion time when pH<1.5. On the contrary, the dry gel synthesized in basic solution combusts at low ignition temperature and combustion reaction is violent; it is easy to form fine particles. XRD and TEM results reveal that the precursor powders are mainly two-phase mixture of La 2 O 3 and MgO. The morphology of the particles is almost flake with the size of ~30 nm when pH is 8.0.

关键词： pH value microstructure nano precursors sol-gel technology

Text segmentation of health examination item based on character statistics and information measurement

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CAAI Transactions on Intelligence Technology 2018年第1期3卷 28-32页

作者： Hui An dahui wang Zhigeng Pan Meiling Chen Xinting wang DigitalMedia & Interaction Research Center Hangzhou Normal University Wenzhou People's Hospital Wenzhou 325000 People's Republic of China Department of Health Examination Hangzhou Normal University Hangzhou People's Republic of China Institute of Industrial VR Foshan University Guangdong People's Republic of China

This study explores the segmentation algorithm of item examination. In the specific implementation, a large amount of h method of character statistics, the connection tightness values text data, especially of sing storical health examination e long length data in health data is analysed. Using the TABS between two adjacent characters are calculated Three parameters, the candidate number N, the best position BP, and balance weight BW are set. The total segmentation indexes Sis are calculated, thus determined the segmentation position Pos. The optimal parameter values are determined by the method of information measurement. Experimental results show that the accuracy rate is 78.6% and reaches 82.9% in the most frequently appeared text item. The complexity of the algorithm is O（n）. Using no existing domain knowledge, it is very simple and fast. By executed repeatedly, it is convenient to obtain the characteristics of each single item of text data, furthermore, to distinguish respective express preference of different physicians to the same item. The assumption is verified that without professional domain knowledge, a large amount of historical data can provide valuable clues for the text understanding. The results of this research are being applied and verified in the following research works in the field of health examination.

关键词：分割算法字符医疗卫生行业人工智能

Clinical and epidemiological features of tibial tubercle avulsion fracture in Chinese adolescents

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World Journal of Pediatric Surgery 2020年第3期3卷 25-28页

作者： Yueqiang Mo dahui wang Pediatric Orthopedics Children's Hospital of Fudan UniversityShanghaiChina

Background Tibial tubercle avulsion fracture is rare in *** knowledge on clinical and epidemiological features of this fracture is of practical significance for clinical colleagues to deal effectively with such *** Clinical and epidemiological parameters were reviewed retrospectively in 29 patients with tibial tubercle avulsion fracture that was treated in our hospital in the past 7 *** Totally,29 children with 30 tibial tubercle fractures were *** were all boys;the average age was 13.8(12-15)years,and the average Body Mass Index(BMI)was 26.4(19.2-34.3).Statistically,41.4%of injuries occurred during jumping activities,and 1(3.4%),12(41.4%)and 16(55.2%)patients were injured bilaterally,on the right and left sides,*** patients were classified into type Ⅰ(4),Ⅱ(3),Ⅲ(13)and Ⅳ(10)*** patients(three knees)with fractures of type IV received close reduction and cast immobilization for 6 *** patient with fracture of type IV underwent close reduction and was fixed with two cannulated *** remaining 26 patients underwent open reduction and were fixed with two or three cannulated *** average follow-up time was 38(14-98)months;no complication was ***-seven patients had an excellent *** In Chinese adolescents,the tibial tubercle avulsion fracture predisposes to boys with higher body weight;jumping is the most common cause of injury;treatments show satisfactory outcome regardless of fracture types.

关键词： injuries adolescent fracture

Chemical Evolution of LiCoO2 and NaHSO4·H2O Mixtures with Different Mixing Ratios During Roasting Process

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Chemical Research in Chinese Universities 2016年第4期32卷 674-677页

作者： wang dahui WEN Hao CHEN Huaijing YANG Yujiao LIANG Hongyan State Key Laboratory of Advance Processing and Recycling of Nonferrous Metals College of Science Lanzhou University of Technology Lanzhou 730050 P R. China

Mixtures of NaHSO4·H2O and LiCoO2 extracted from spent lithium-ion batteries were prepared with molar ratios of 1：1, 1：2 and 1：3. The chemical evolution of the LiCoO2 and NaHSO4-H20 mixtures during the roasting process was investigated by means of thermogravimetric analysis and differential scanning calorimetry （TG-DSC）, X-ray diffraction（XRD）, scanning electron （XPS）. The results show that the chemical reactions in microscopy（SEM）, and X-ray photoelectron spectroscopy the LiCoO2 and NaHSO4·H2O mixtures proceed during the roasting process. The Li element in the product of the roasting process is in the form of LiNa（SO4）. With the increase of the proportion of NaHSO4·H2O in the mixtures, the Co element evolves as follows： LiCoO2→Co3O4→Na6Co（SOa）4→Na2Co（SO4）2. The roasting products exhibit dense structures and irregular shapes, and the bonding energy of Co increases.

关键词： Spent lithium-ion battery LiCo02 Sulfating roasting Chemical evolution

Mechanism of Lithium and Cobalt Recovery from Spent Lithium-ion Batteries by Sulfation Roasting Process

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Chemical Research in Chinese Universities 2020年第5期36卷 908-914页

作者： YU Yucshan wang dahui CHEN Huaijing ZHANG Xiaodong XU Li YANG Lixin State Key Laboratory of Advance Processing and Recycling of Nonferrous Metals Lanzhou University TechnologyLanzhou 730050P.R.China College of Science Lanzhou University TechnologyLanzhou 730050P.R.China

Diflerent from the traditional pyTometallurgical recovery process of Li and Co from spent lithium-ion batteries,a new recovery method for Li and Co was established by converting LiCoO2 into water-soluble metal sul-fates by roasting a mixture of LiCoO2 and *** evolution law of the mixture with increased roasting temperature was investigated by thennogravimetry-diflerential scamiing calorimetry(TG-DSC),in situ X-ray diflrac-tion(XRD),XRD,and X-ray photoelectron spectroscopy(XPS).The results show that the phase transition of LiCoO2 mixed with NaHSO4 H2O with increased temperature proceeded as follows:LiCoO2,NaHSO4 H2O→LiCo02,NaHSO4→Lil-xCo02,LiNaSO4,Na2S2O7,Na2SO4→Li1-xCoCO2,Co3O4,LiNaSO4,Na2SO4→Co3O4,*** reaction mechanism of this roasting process may be as follows:LiCoO2+NaHSO4-H2O→l/2Li2SO4+l/2Na2SO4+l/3Co3O4+l/12O2+3/2H2O,Li2SO4+Na2SO4=2LiNaSO4.

关键词： LiCoO2 Chemical evolution Roasting In situ XRD

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北京师范大学学报（自然科学版） 2023年第5期59卷 689-690页

作者：王大辉北京师范大学系统科学学院北京100875

生活中人们常常会发现,欣欣向荣的活力所迸发的生命,其结构从简单且均一逐步演化为复杂且精巧,以获得其完美的功能.普里高津立足于化学热力学:利用动力学工具研究溶液中的化学反应;揭示了远离平衡态的开放系统通过自组织形成新的时空结... 详细信息

生活中人们常常会发现,欣欣向荣的活力所迸发的生命,其结构从简单且均一逐步演化为复杂且精巧,以获得其完美的功能.普里高津立足于化学热力学:利用动力学工具研究溶液中的化学反应;揭示了远离平衡态的开放系统通过自组织形成新的时空结构;提出了耗散结构理论,因此,他于1977年获得诺贝尔化学奖.普里高津揭开了复杂性研究的序幕,引发了一个将耗散结构理论应用于众多复杂系统的高潮.

关键词：耗散结构理论诺贝尔化学奖化学热力学开放系统普里高津时空结构远离平衡态化学反应

不同溶氧控制方式下的谷胱甘肽分批发酵过程分析

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化工学报 2007年第9期58卷 2329-2335页

作者：卫功元王大慧陈坚苏州大学生命科学学院江苏苏州215123 江南大学工业生物技术教育部重点实验室江苏无锡214036

分析了产朊假丝酵母生产谷胱甘肽(GSH)的摇瓶发酵过程,发现溶氧浓度的大小成为影响细胞生长和GSH产量的重要因素。在此基础上,研究了恒溶氧和恒转速条件下的GSH分批发酵过程,与恒转速发酵相比,恒溶氧控制发酵可以明显提高细胞干重和GSH... 详细信息

分析了产朊假丝酵母生产谷胱甘肽(GSH)的摇瓶发酵过程,发现溶氧浓度的大小成为影响细胞生长和GSH产量的重要因素。在此基础上,研究了恒溶氧和恒转速条件下的GSH分批发酵过程,与恒转速发酵相比,恒溶氧控制发酵可以明显提高细胞干重和GSH产量,当恒溶氧浓度为35%时,二者的提高幅度最多可分别达到22%和30%。最后分别采用发酵动力学模型和代谢网络中各代谢物通量的分布情况对该结果产生的原因进行了定量解释。

关键词：谷胱甘肽分批发酵溶解氧动力学代谢通量分析

Wet Air Oxidation of Wastewater from Tricylazole Production

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高校化学工程学报 1994年第S1期8卷 62-66页

作者： Tang Shouyin wang dahui Liu Xiande Tan Tianen (Chemical Engineering Department of Zhejiang University, HangZhou, 310027)

ＷｅｔＡｉｒＯｘｉｄａｔｉｏｎｏｆＷａｓｔｅｗａｔｅｒｆｒｏｍＴｒｉｃｙｌａｚｏｌｅＰｒｏｄｕｃｔｉｏｎＴａｎｇＳｈｏｕｙｉｎ；ＷａｎｇＤａｈｕｉ；ＬｉｕＸｉａｎｄｅ；ＴａｎＴｉａｎｅｎ（ＣｈｅｍｉｃａｌＥｎｇｉｎｅ... 详细信息

ＷｅｔＡｉｒＯｘｉｄａｔｉｏｎｏｆＷａｓｔｅｗａｔｅｒｆｒｏｍＴｒｉｃｙｌａｚｏｌｅＰｒｏｄｕｃｔｉｏｎＴａｎｇＳｈｏｕｙｉｎ；ＷａｎｇＤａｈｕｉ；ＬｉｕＸｉａｎｄｅ；ＴａｎＴｉａｎｅｎ（ＣｈｅｍｉｃａｌＥｎｇｉｎｅｅｒｉｎｇＤｅｐａｒｔｍｅｎｔｏｆ...

关键词： wastewater wet air oxidation tricylazole catalyst

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经济危机中广告文案的情感渗透

新闻界 2009年第4期 197-198页

作者：王大慧辽宁师范大学文学院大连116029

本文结合当前正在全球蔓延的金融危机，剖析在经济危机中广告文案情感渗透的趋势以及广告所承载的社会责任。

关键词：经济危机文案情感

Mg2+-MEDIATED CHANGE IN LIPID FLUIDITY ENHANCES THE RECONSTITUTED H+-ATPASE ACTIVITY

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Science in China,Ser.B 1983年第10期26卷 1046-1056页

作者：杨福愉郭倍奇王大辉 Institute of Biophysics Academia Sinica Beijing

The results by using ANS fluorescent probe and spin labels 5-NS show that the fluidity of L.（H+-ATPase）+Mg2+ (H+-ATPase from pig heart mitochondria reconstituted in the presence of Mg2+) is less than that of L （H+-ATPase）-Mg2+ (proteoliposome reconstituted in the absence of Mg2+). But no significant difference in fluidity has been observed when both reconstituted systems were monitored by using spin labels 12-NS and 16-NS. This indicates that Mg2+ may cause changes in fluidity of the lipid molecules near the surfaces of the bilayers, but does not affect significantly the fluidity of the deeper layer of the reconstituted *** is tentatively supposed that in the presence of Mg2+, enhancement of activities of reconstituted H+-ATPase may be due to the Mg2+-mediated change in physical state of the lipids in the more superficial region of lipid bilayers so as to ensure a suitable conformation of ATPase complex, thereby possessing higher activity.

关键词： NS ATPASE ACTIVITY MEDIATED CHANGE IN LIPID FLUIDITY ENHANCES THE RECONSTITUTED H Mg ATPase