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| 1 | Milligan-Morgan hemorrhoidectomy with anal cushion suspension and partial internal sphincter resection for circumferential mixed hemorrhoids显示文摘AIM:To identify a more effective treatment protocol for circumferential mixed hemorrhoids.METHODS:A total of 192 patients with circumferential mixed hemorrhoids were randomized into the treatment group,where they underwent Milligan-Morgan hemorrhoidectomy with anal cushion suspension and partial internal sphincter resection,or the control group,where traditional external dissection and internal ligation were performed.Postoperative recovery and complications were monitored.RESULTS:The time to wound healing was 12.96 ± 2.25 d in the treatment group shorter than 19.58 ± 2.71 d in the control group.Slight pain rate was 58.3% in the treatment group higher than 22.9% in the control group;moderate pain rate was 33.3% in the treatment group lower than 56.3% in the control group severe pain rate was 8.4% in the treatment group lower than 20.8% in the control group.No edema rate was 70.8% in the treatment group higher than 43.8% in the control group;mild local edema rate was 26% in the treatment group lower than 39.6% in the control group obvious local edema was 3.03% in the treatment group lower than 16.7% in the control group.No stenosis rate was 85.4% in the treatment group higher than 63.5% in the control group;moderate stenosis rate was 14.6% in the treatment group Lower than 27.1% in the control group severe anal stenosis rate was 0% in the treatment group lower than 9.4% in the control group.CONCLUSION:Milligan-Morgan hemorrhoidectomy with anal cushion suspension and partial internal sphincter resection is the optimal treatment for circumferential mixed hemorrhoids and can be widely applied in clinical settings. | Ming Lu Guang-Ying Shi Guo-Qiang Wang Yan Wu Yang Liu Hao Wen | 2013 | World Journal of Gastroenterology2013，19，30： | 44 |
| 2 | Solid-state fermentation of corn-soybean meal mixed feed with Bacillus subtilis and Enterococcus faecium for degrading antinutritional factors and enhancing nutritional value显示文摘Background: Corn and soybean meal(SBM) are two of the most common feed ingredients used in pig feeds.However, a variety of antinutritional factors(ANFs) present in corn and SBM can interfere with the bioavailability of nutrients and have negative health effects on the pigs. In the present study, two-stage fermentation using Bacillus subtilis followed by Enterococcus faecium was carried out to degrade ANFs and improve the nutritional quality of corn and SBM mixed feed. Furthermore, the microbial composition and in vitro nutrient digestibility of inoculated mixed feed were determined and compared those of the uninoculated controls.Results: During the fermentation process, B. subtilis and lactic acid bacteria(LAB) were the main dominant bacteria in the solid-state fermented inoculated feed, and fermentation produced a large amount of lactic acid(170 mmo L/kg),which resulted in a lower pH(5.0 vs. 6.4) than the fermented uninoculated feed. The amounts of soybean antigenic proteins(β-conglycinin and glycinin) in mixed feed were significantly decreased after first-stage fermentation with B. subtilis. Inoculated mixed feed following two-stage fermentation contained greater concentratioin of crude protein(CP), ash and total phosphorus(P) compared to uninoculated feed, whereas the concentrations of neutral detergent fiber(NDF), hemicellulose and phytate P in fermendted inoculated feed declined(P < 0.05) by 38%, 53%, and 46%,respectively. Notably, the content of trichloroacetic acid soluble protein(TCA-SP), particularly that of small peptides and free amino acids(AA), increased 6.5 fold following two-stage fermentation. There was no difference in the total AA content between fermented inoculated and uninoculated feed. However, aromatic AAs(Phe and Tyr) and Lys in inoculated feed increased, and some polar AAs, including Arg, Asp, and Glu, decreased compared with the uninoculated feed. In vitro dry matter and CP digestibility of inoculated feed improved(P < 0.05) compared with the uninoculated feed.Conclusions: Our results suggest that two-stage fermentation using B. subtilis followed by E. faecium is an effective approach to improve the quality of corn-soybean meal mixed feed. | Changyou Shi Yu Zhang Zeqing Lu Yizhen Wang | 2017 | Journal of Animal Science and Biotechnology2017，8，4： | 44 |
| 3 | 基于选择试验模型的生态系统服务支付意愿差异及全价值评估——以渭河流域为例显示文摘对流域生态系统服务进行全价值评估有利于相关流域治理政策的建立,实现流域的可持续发展。本文应用选择试验模型法,对我国流域生态系统服务的非市场价值进行评估,并以渭河流域陕西段为例进行实证研究。在生态功能属性和指标的合理选取基础上进行选择试验模型设计和问卷调查,进一步分析渭河流域城乡居民对流域生态系统服务的认知差异,以及测算相关样本的支付意愿,最终进行非市场价值估算。研究结果表明:1相对于城镇居民,农村居民不在意水土流失方面生态系统服务的改善,而更关心水资源数量和质量,以及自然景观和生态旅游条件等方面的改善;2渭河流域居民对水资源质量这一生态指标具有最高的支付意愿,对水土流失强度这一生态指标具有次高的支付意愿,而对自然景观这一生态指标具有最低的支付意愿;3陕西省渭河流域平均每户居民每年愿意为渭河流域生态系统服务的改善支付624.22元,且城镇居民的支付意愿(830.34元/户)明显高于农村居民(525.46元/户)。陕西省渭河流域生态系统服务每年的非市场价值为8.68亿元。 | 史恒通 赵敏娟 | 2015 | 资源科学2015，37，2： | 36 |
| 4 | Mixed Logit模型及其在交通方式分担中的应用研究显示文摘离散选择模型的典型代表Logit模型简洁易用的特点使其在经济、交通等领域得到了广泛的应用,但同时Logit模型的两个重要缺陷限制了其应用范围。在分析了Logit模型固有的两个缺陷和Mixed Logit模型的良好性质后,比较了Logit模型与Mixed Logit模型的差异,对Mixed Logit模型的算法进行了研究,并借助SAS统计软件提供的仿真算法给出了详细的工程实践应用范例。结果表明,Mixed Logit模型有着更丰富的物理含义,对个人出行交通方式选择行为的描述更符合实际。 | 王树盛 黄卫 陆振波 | 2006 | 公路交通科技2006，23，5： | 35 |
| 5 | Application and Prospect of Mixed Reality Technology in Medical Field显示文摘Mixed reality(MR)technology is a new digital holographic image technology,which appears in the field of graphics after virtual reality(VR)and augmented reality(AR)technology,a new interdisciplinary frontier.As a new generation of technology,MR has attracted great attention of clinicians in recent years.The emergence of MR will bring about revolutionary changes in medical education training,medical research,medical communication,and clinical treatment.At present,MR technology has become the popular frontline information technology for medical applications.With the popularization of digital technology in the medical field,the development prospects of MR are inestimable.The purpose of this review article is to introduce the application of MR technology in the medical field and prospect its trend in the future. | Hong-zhi HU Xiao-bo FENG Zeng-wu SHAO Mao XIE Song XU Xing-huo WU Zhe-wei YE | 2019 | Current Medical Science2019，39，1： | 29 |
| 6 | 基于选择实验法的城市生态系统服务价值评估——以四川温江为例显示文摘对城市生态系统服务价值的全面认知是实现城市生态系统可持续发展的基础。论文以四川温江为例,首先,基于选择实验法,构建城市生态系统服务功能属性指标和设置属性水平,了解温江居民对不同状态水平的选择偏好;然后,采用Mixed Logit模型对居民城市生态系统服务效用函数进行拟合,探讨生态系统服务各属性隐含价格和居民补偿剩余;最后,对温江城市生态系统服务价值进行评估。结果表明:1)温江居民对于城市生态系统服务功能偏好由高到低分别为城市小气候、水环境、空气质量、城市噪声污染和休闲娱乐文化。2)各生态系统服务功能属性指标隐含价格分别为:为了在5 a内实现温江城市生态系统服务功能各指标预设目标,空气质量达标天数比率每提高1%,当地居民支付意愿为399.45元/(人·a);河流综合污染指数每下降1%,当地居民支付意愿为564.03元/(人·a);一类地区环境噪声比每降低1%,当地居民支付意愿为295.25元/(人·a);夏季最高温度比每提高1%,当地居民支付意愿为630.81元/(人·a);人均公共绿地面积比重每提高1%,当地居民支付意愿为219.29元/(人·a)。3)为在5 a内实现目标,温江居民的整体人均意愿支付成本为113.59元/(人·a),据此可以计算得出目前温江城市生态系统服务全价值为3 733.08万元/a。 | 石春娜 姚顺波 陈晓楠 薛彩霞 龚直文 | 2016 | 自然资源学报2016，31，5： | 24 |
| 7 | Discovery of a Late Permian Angara-Cathaysia mixed flora from Acheng of Heilongjiang,China,with discussions on the closure of the Paleoasian Ocean显示文摘This work documents a new flora from the Upper Permian Hongshan Formation of Acheng County, Heilongjiang Province, Northwest China. The flora consists of 20 species: Paracalamites sp., Pecopteris tangwangheensis Huang, Callipteris obese Huang, Callipteris shenshuensis Huang, C. tangwangheensis Huang, C. heilongjiangensis Huang, C. zeilleri Zalessky, C. sp., Comia yichunensis Huang, C. tenueaxis Huang, Iniopteris sibirica Zalessky, Supaia teiliensis Huang, Compsopteris tchirkovae Zalessky, C. cf. adzvensis Zalessky, Nilssonia sp. 1, Nil. sp. 2, Taeniopteris cf. densissima Halle, T. cf. nystraemii Halle, T. sp. and Noeggerathiopsis derzavinii Neub. It is dominated by Angara species but mixed with some typical Cathaysian elements. The age of the flora is assigned to late of the Late Permian according to the stratigraphic ranges of the known species and the comparisons of it with the similar floras. The new discovery indicates that the final collision between the North China Plate and Siberian Plate occurred in Late Permian along the Xar Moron River-Changchun-Yanji sutured zone, and the Paleoasian Ocean was finally closed at the end of the Permian. | DENG ShengHui1,2, WAN ChuanBiao3 & YANG JianGuo3 1 Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China 2 State Key Laboratory of Enhanced Oil Recovery, Beijing 100083 China 3 Daqing Institute of Petroleum Exploration and Development, PetroChina, Daqing 164712, China | 2009 | Science China Earth Sciences2009，52，11： | 22 |
| 8 | 变摩擦系数条件下的轮轨滚动接触特性分析显示文摘采用mixed Lagrangian/Eulerian方法建立轮轨滚动接触有限元模型,在轮轨间使用与滑动速度相关的变摩擦系数定义切向接触属性,改变轮对角速度定义轮轨接触不同工况。在轮轨蠕滑工况下,通过对比取常系数摩擦系数和变摩擦系数的计算结果发现:变摩擦系数对轮轨滚动接触最大接触应力和接触斑面积影响较小;但是对轮轨接触斑内最大Mises应力、最大纵向切应力、最大横向切应力和蠕滑力影响较大,特别是对最大纵向切应力和蠕滑力影响幅度近20%;对轮轨滚动接触蠕滑力矢量分布的影响也应值得注意。不同工况时轮轨蠕滑率不同,变摩擦系数条件下的轮轨蠕滑力和剪切应力随蠕滑率增大而增大,当轮轨间出现完全滑动时,轮轨蠕滑力达到极限。 | 肖乾 林凤涛 王成国 车宇翔 | 2012 | 铁道学报2012，34，6： | 23 |
| 9 | 节水灌溉技术社会生态效益评估——以石羊河下游民勤县为例显示文摘节水灌溉技术的社会生态效益评估是相关政策制定的重要参考依据。本文以甘肃省石羊河下游民勤县为例,基于选择实验法构建了节水灌溉技术的效益评估框架,并通过问卷设计、选择实验调研和Mixed Logit模型估计,测算了技术采用效益。结果显示,民勤县居民已经形成了一定的社会生态认知,以期通过相应的治理措施来保障区域生态环境的稳定;城镇居民平均每户愿意为当地社会生态环境的改善支付657.21元/年,高于农村居民的587.06元/年;未来10年,民勤县实施节水灌溉技术的社会生态效益总量为3.946亿元,单位播种面积的节水效益总量为7674元/hm^2。此外,本文还进一步探讨了运用选择实验法量化节水灌溉技术采用效益的优势与不足,并指出了进一步研究中需要重点关注的一些问题。 | 徐涛 姚柳杨 乔丹 陆迁 颜俨 赵敏娟 | 2016 | 资源科学2016，38，10： | 23 |
| 10 | 基于选择试验模型的基本农田非市场价值评估——以浙江省德清县为例显示文摘非市场价值是基本农田价值的重要组成部分。对基本农田价值的全面认识与科学评估,有助于基本农田保护经济补偿机制的建立。针对目前中国耕地和基本农田非市场价值研究中尚未引入选择试验模型的现状,论文尝试将选择试验模型引入基本农田非市场价值评估研究,并以浙江省德清县为例展开实证分析。在问卷调查的基础上,首先分析城乡居民对于基本农田保护的认知差异;然后运用选择试验模型分析城乡居民对于基本农田非市场价值的认知偏好及其可能的异质性来源;最后评估并比较城乡居民对于基本农田非市场价值的支付意愿,得出德清县基本农田的非市场价值。研究得到如下主要结论:①城乡居民对基本农田非市场价值的认知偏好存在差异,其认知偏好受年龄、教育程度、家庭人口数、收入、行为和态度变量的影响;②城镇居民的支付意愿普遍高于农村居民,城镇居民平均年支付意愿为143.04元/户,农村居民平均年支付意愿为27.47元/户,城乡居民的收入差异显著影响其支付意愿;③Mixed Logit模型能够揭示不同个体之间存在的选择偏好的异质性及其可能来源,且模型拟合程度更高,解释力优于MNL模型,但是,在应用MNL模型和Mixed Logit模型评估属性的支付意愿时,估计结果存在差异;④计算结果表明,2009年德清县基本农田非市场价值为2.58×108元,单位面积非市场价值为1.27×104元/hm2,占基本农田总价值的54.17%。 | 谭永忠 陈佳 王庆日 牟永铭 刘怡 施雅娟 | 2012 | 自然资源学报2012，27，11： | 21 |
| 11 | 伪双曲型积分-微分方程的H^1-Galerkin混合元法误差估计显示文摘1引言考虑如下一类具有Lipschitz连续边界(?)Ω的凸有界区域Ω上的伪双曲型积分微分方程其中Ω(?)Rd,(d=1,2,3)J=(0,T],对于固定的T,0 | 刘洋 李宏 何斯日古楞 | 2010 | 高等学校计算数学学报2010，32，1： | 21 |
| 12 | 私家车出行者通勤出行时间价值显示文摘私家车出行者的通勤出行时间价值是实施和评价道路拥挤收费项目的重要参数之一.本文利用大连市私家车出行者意向调查数据,分别使用Logit模型和时间系数为常数、费用系数服从对数正态分布的Mixed Logit模型来标定私家车出行者通勤出行时间价值.标定的结果显示:两个模型标定结果中的各参数的t值都非常显著;MixedLogit模型标定结果中的最大似然值和优度比都优于Logit模型;使用Logit模型标定的私家车出行者通勤出行时间价值为24.58元/小时;使用Mixed Logit模型标定的私家车出行者通勤出行时间价值服从参数为2.73和1.09的对数正态分布.在实施和评价道路拥挤收费项目时,推荐使用Mixed Logit模型的标定结果. | 赵胜川 王喜文 张羽祥 姚荣涵 | 2009 | 交通运输系统工程与信息2009，9，1： | 19 |
| 13 | Alkali-rich porphyry and its relation with intraplate deformation of north part of Jinsha River belt in western Yunnan, China显示文摘A suite of alkali rich porphyry with 26.5\37.6Ma occur along the Jinsha River suture zone in west Yunnan. They are characterized by LREE rich distribution patterns and no Eu anomaly. These porphyries have formed in post collisional environment; ( 87 Sr/ 86 Sr) i of porphyries, amphibolite xenolithes and associated basalts are 0.707 3, 0.706 5\0.707 1 and 0.705 8\0.706 5, ε Nd ( T ) are -3.4\-6.3, -2.1\-7.4 and -3.3 respectively. Pb isotope compositions of these rocks also show a little difference. The evidence shows that the porphyry could be derived from partial melting of the 'crust mantle mixed layer'. The relation between Cenozoic magmatism and intraplate deformation since Paleogene has been discussed. | 邓万明 黄萱 钟大赉 | 1998 | Science China Earth Sciences1998，41，3： | 19 |
| 14 | Study on Roasting Decomposition of Mixed Rare Earth Concentrate in CaO-NaCl-CaCl_2显示文摘The decomposed process of bastnaesite, monazite and mixed rare earth concentrate in CaO-CaCl-CaCl2 was studied by means of TG-DTA method. The relationship among decomposition ratio, roasting temperature, and CaO-NaCl addition was studied by the quadratic regression orthogonal analysis, and then the regression equation was obtained. Through analysis, the optimum process conditions of mixed rare earth concentrate decomposed by CaO-CaCl-CaCl2 were obtained as follows: roasting temperature: 700 ℃, CaO addition: 15%, NaCl-CaCl2 addition: 10%, roasting time: 60 min, the decomposition ratio: 91.3%. | 吴文远 边雪 孙树臣 涂赣峰 | 2006 | Journal of Rare Earths2006，24，z2： | 18 |
| 15 | STUDY ON MIXED MODEL OF NEURAL NETWORK FOR FARMLAND FLOOD/DROUGHT PREDICTION显示文摘The paper concerns a flood/drought prediction model involving the continuation of time seriesof a predictand and the physical factors influencing the change of predictand.Attempt is made toconstruct the model by the neural network scheme for the nonlinear mapping relation based onmulti-input and single output.The model is found of steadily higher predictive accuracy by testingthe output from one and multiple stepwise predictions against observations and comparing theresults to those from a traditional statistical model. | 金龙 罗莹 郭光 林振山 | 1997 | Acta meteorologica Sinica1997，11，3： | 18 |
| 16 | SAS Proc Mixed在林木育种试验统计中应用简介显示文摘SAS Proc Mixed过程是SAS软件专为线性混合模型的分析而设计的统计过程,广泛应用于动物遗传改良,但在林业上的应用很少。文章就该过程在林业双列杂交、自由授粉子代测定和裂区试验设计等方面的利用,举例对分析程序、输出结果等作介绍。该过程能对试验因子作最佳线性无偏预测(best linear unbiased prediction,BLUP),大大提高统计分析的准确性;并能自动适应多个误差效应的混合线性模型检验,与Proc GLM过程相比,Proc Mixed过程更简洁易用、分析效率高。 | 王润辉 胡德活 | 2011 | 广东林业科技2011，27，3： | 18 |
| 17 | The concept of effective emissivity of nonisothermal mixed pixel and its test显示文摘Based on two preconditions, the local thermal equilibrium is satisfied and emissivities donot change with temperature, the concept of component effective emissivity of nonisothermal mixed pixel has been put forward and then the radiant directionality model of nonisothermal mixed pixel constructed from it. Our study shows that the component effective emissivity is associated with geometric structure, optical properties of target, and viewing angle, but does not depend on the component temepratures. The component temperatures can only change the ratio of component radiance to the total radiance of the mixed-pixel. The total effective emissivity of this pixel is the complement of its directional-hemisphere reflectance. After the simulation of component effective emissivity of the discrete cones and continuous vegetation canopy (winter wheat) by the Monte Carlo method, our model of radiant directionality of nonisothermal mixed pixel have been proved by lab and field measurements. | CHEN Liangfu ZHUANG Jiali XU Xiru NIU Zheng ZHANG Renhua XIANG Yueqing | 2000 | Chinese Science Bulletin2000，45，9： | 17 |
| 18 | Al_(80)Ni_6Y_8Co_4Cu_2 GLASS ALLOYS CONTAINING NANOSCALEPARTICLES BY ISOTHERMAL ANNEALING OR QUENCHING显示文摘Al80Ni6 Y8 Co4 Cu2 amorphous ribbons were isothermally annealed and a mixed structure consisting of α-Al particle with a size of less than 15nm and Al3Ni compound with a size of about 30nm was obtained. The crystallization kinetics of Al80Ni6 Y8 Co4 Cu2 amorphous alloy shows that the precipitation of α-Al particles is the growth process controlled by diffusion of the solute elements rejected from the growing crystals. By quenching at different cooling rates, a mixed structure consisting of nanoscale α-Al particles and the remaining glass matrix or structure consisting of nanoscale particle (Al phase or Al3Ni compound) with a size of about 100nm was formed. The addition of Co elements and Cu elements to Al-Ni-Y alloy systems increases the glass formation ability of the alloy and the thermal stability of the supercooled liquid region against crystallization, which results from significant difference of atomic size, strong bonding nature among constituent elements and the low diffisivity of the solute elements due to the concentration gradient in the growing front of crystals. | Z. Bian, G. He and G.L. Chen (State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China) J. Lu, D.J. Chen, G.C. Tu, G.J. Chen and X.J. Hu (Shougang Metallurgical Research Institute, Beijing | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，5： | 16 |
| 19 | 引入忠诚度变量的城际出行方式动态选择行为研究显示文摘针对中国城市群的快速形成与发展,结合城市群城际出行特点,研究城市群城际出行方式选择行为。基于非集计理论,对效用函数引入刻画动态选择行为的忠诚度变量,抓住了出行者出行方式选择的关联性。利用了平滑指数计算忠诚度变量,既反映了忠诚度的持续性也考虑了突变性。将忠诚度变量作为影响因素引入模型的可观测效用部分,建立出行者城际出行方式选择Mixed Logit模型。在大量调查问卷基础上,通过对引入前后的模型对比分析计算得出,忠诚度变量加入后,模型中其他的出行影响因素效用强度明显削弱,其产生的正效用证明了城际出行选择是一种带有倾向性的行为反应,具有某种出行方式选择的持续性、依赖性和突变性,说明出行者过往的出行体验对选择心理具有显著的影响,也说明构建的模型很好地还原了出行方式选择的动态特性。 | 吴麟麟 卢海琴 汪洋 张明岩 | 2014 | 公路交通科技2014，31，11： | 16 |
| 20 | Meteorological control on CO_2 flux above broad-leaved Korean pine mixed forest in Changbai Mountains显示文摘The impacts of temperature, photosynthetic active radiation (PAR) and vapor pressure deficit (VPD) on CO2 flux above broad-leaved Korean pine mixed forest in the Changbai Mountains were studied based on eddy covariance and meteorological factors measurements.The results showed that, daytime CO2 flux was mainly controlled by PAR and they fit Michaelis-Menten equation. Meanwhile VPD also had an influence on the daytime flux. Drier air reduced the CO2 assimilation of the ecosystem, the drier the air, the more the reduction of the assimilation. And the forest was more sensitive to VPD in June than that in July and August. The respiration of the ecosystem was mainly controlled by soil temperature and they fit exponential equation. It was found that this relationship was also correlated with seasons; respiration from April to July was higher than that from August to November under the same temperature. Daily net carbon exchange of the ecosystem and the daily mean air temperature fit exponential equation. It was also found that seasonal trend of net carbon exchange was the result of comprehensive impacts of temperature and PAR and so on. These resulted in the biggest CO2 uptake in June and those in July and August were next. Annual carbon uptake of the forest ecosystem in 2003 was -184 gC. m-2. | GUAN Dexin, WU Jiabing, YU Guirui, SUN Xiaomin, ZHAO Xiaosong, HAN Shijie & JIN Changjie Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China | 2005 | Science China Earth Sciences2005，48，z1： | 15 |
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