边疆渔歌——记屏边县农科局水产站站长杨自成

1988年，杨自成从四川省水产学校毕业，被分配到屏边县水电局管理股从事水产工作。那时，全县水产品产量仅20吨左右，人均水产品占有量仅0.1公斤，市场上除节，假日有少量鲜、活水产品供应外，其余时间几乎没有水产品上市，且价格昂贵，每公斤达25元左右。他看在眼里，急在心头。

叙州区:“四下乡”活动拉开帷幕

2019年1月30日,由区委宣传部主办,区文广局、区经科局、区卫计局、区司法局承办的叙州区2019年送文化、科技、卫生、法律下乡活动走进横江镇厚石村,让当地群众在家门口就可以享受到实实在在的好政策、好服务。活动现场,人潮涌动、热闹非凡。由金江艺术研究院带来的文艺演出,通过群众喜闻乐见的形式,将精准扶贫融入表演,受到了现场观众的热烈欢迎。

An Ensemble-Based Three-Dimensional Variational Assimilation Method for Land Data Assimilation

Land surface models are often highly nonlinear with model physics that contain parameterized discontinuities. These model attributes severely limit the application of advanced variational data assimilation methods into land data assimilation. The ensemble Kalman filter (EnKF) has been widely employed for land data assimilation because of its simple conceptual formulation and relative ease of implementation. An updated ensemble-based three-dimensional variational assimilation (En3-DVar) method is proposed for land data assimilation.This new method incorporates Monte Carlo sampling strategies into the 3-D variational data assimilation framework. The proper orthogonal decomposition (POD) technique is used to efficiently approximate a forecast ensemble produced by the Monte Carlo method in a 3-D space that uses a set of base vectors that span the ensemble. The data assimilation process is thus significantly simplified. Our assimilation experiments indicate that this new En3-DVar method considerably outperforms the EnKF method by increasing assimilation precision. Furthermore, computational costs for the new En3-DVar method are much lower than for the EnKF method.

HIERARCHIC GREY QUASI-PREFERRED ANALYSIS MODEL AND ITS APPLICATION

The grey quasi-preferred analysis (GQPA) is one of important methods for realizing system analysis to conquer the limitations of the existing GQPA model, without any considerations to the difference of the different behavioral factor′s importance. It could not be used to analyze the complex system with multi-hierarchy correlation factors, the weighted synthetic method for calculating abstract incidence degrees between the system beha-vioral characteristics and correlative factors in different hierarchies is given out,and the hierarchic grey quasi-preferred analysis (HGQPA) model is established. The effectiveness of the HGQPA model is tested by the scientific-technical system of Jiangsu Province. The depth and the range of the application of GQPA are developed, and the HGQPA model is regarded as a new approach to systemically analyze the complex systems with multi-hierarchy correlation factors.

PROSPECTIVE COMPARISON OF ENDOSCOPIC AND OPEN SURGICAL METHODS FOR CARPAL TUNNEL SYNDROME

Objective To compare outcomes of patients undergoing either open or endoscopic carpal tunnel release for the treatment of idiopathic carpal tunnel syndrome. Methods A prospective, randomized study was performed on 70 hands in 62 patients with idiopathic carpal tunnel syndrome from April 2000 to April 2004. Either open (36 hands in 30 patients) or endoscopic (34 hands in 32 patients) carpal tunnel release was performed randomly. Symptom improvement, complications, and the time of operation, in-hospital stay, and return to work between the two groups were assessed with average 2 years of follow-up. The electromyography was tested pre- and 3 months post-operation. Results There were no significant differences between the two surgical groups with regard to postoperative improvements of symptom, electromyography tests, and the incidence of complications. But it was statistically less in the rate of scar tenderness, the time of operation, in-hospital stay, and return to work in the endoscopic group compared with the open group (P<0.05). Conclusions The endoscopic carpal tunnel release is a reliable method in the treatment of idiopathic carpal tunnel syndrome. And it has the advantages of slight scar tenderness, less operation time, less in-hospital stay, early functional recovery, safety, and high satisfaction rate compared with open methods.

Multidisciplinary approach for patients with esophageal cancer

Patients with esophageal cancer have a poor prognosis because they often have no symptoms until their disease is advanced. There are no screening recommendations for patients unless they have Barrett's esophagitis or a significant family history of this disease. Often, esophageal cancer is not diagnosed until patients present with dysphagia, odynophagia, anemia or weight loss. When symptoms occur, the stage is often stage Ⅲ or greater. Treatment of patients with very early stage disease is fairly straight forward using only local treatment with surgical resection or endoscopic mucosal resection. The treatment of patients who have locally advanced esophageal cancer is more complex and controversial. Despite multiple trials, treatment recommendations are still unclear due to conflicting data. Sadly, much of our data is difficult to interpret due to many of the trials done have included very heterogeneous groups of patients both histologically as well as anatomically. Additionally, studies have been underpowered or stopped early due to poor accrual. In the United States, concurrent chemoradiotherapy prior to surgical resection has been accepted by many as standard of care in the locally advanced patient. Patients who have metastatic disease are treated palliatively. The aim of this article is to describe the multidisciplinary approach used by an established team at a single high volume center for esophageal cancer, and to review the literature which guides our treatment recommendations.

Continuous wound infusion of local anaesthetic agents following colorectal surgery:Systematic review and meta-analysis

AIM:To provide a specifi c review and meta-analysis of the available evidence for continuous wound infusion of local anaesthetic agents following midline laparoto-my for major colorectal surgery. METHODS: Medline, Embase, trial registries, conference proceedings and article reference lists were searched to identify randomised, controlled trials of continuous wound infusion of local anaesthetic agents following colorectal surgery. The primary outcomes were opioid consumption, pain visual analogue scores (VASs), return to bowel function and length of hospital stay. Weighted mean difference were calculated for continuous outcomes. RESULTS: Five trials containing 542 laparotomy wounds were eligible for inclusion. There was a sig- nificant decrease in post-operative pain VAS at rest on day 3 (weighted mean difference: -0.43; 95% CI: -0.81 to -0.04; P = 0.03) but not on post-operative day 1 and 2. Local anaesthetic infusion was associated with a signifi cant reduction in pain VAS on movement on all three post-operative days (day 1 weighted mean difference: -1.14; 95% CI: -2.24 to -0.041; P = 0.04, day 2 weighted mean difference: -0.97, 95% CI: -1.91to -0.029; P = 0.04, day 3 weighted mean difference: -0.61; 95% CI: 1.01 to -0.20; P = 0.0038). Local an- aesthetic wound infusion was associated with a signifi - cant decrease in total opioid consumption (weighted mean difference: -40.13; 95% CI: -76.74 to -3.53; P = 0.03). There was no signifi cant decrease in length of stay (weighted mean difference: -20.87; 95% CI: -46.96 to 5.21; P = 0.12) or return of bowel function (weighted mean difference: -9.40; 95% CI: -33.98 to 15.17; P = 0.45). CONCLUSION: The results of this systematic re- view and meta-analysis suggest that local anaesthetic wound infusion following laparotomy for major color- ectal surgery is a promising technique but do not pro- vide conclusive evidence of benefi t. Further research is required including cost-effectiveness analysis.

Long-term results of endosurgical and open surgical approach for Zenker diverticulum

AIM: To assess the effectiveness of minimally invasive versus traditional open surgical approach in the treatment of Zenker diverticulum. METHODS: Between 1976 and 2006, 297 patients underwent transoral stapling (n = 181) or stapled diverticulectomy and cricopharyngeal myotomy (n = 116). Subjective and objective evaluations of the outcome of the two procedures were made at 1 and 6 mo after operation, and then every year. Long-term follow-up data were available for a subgroup of patients at a minimum of 5 and 10 years. RESULTS: The operative time and hospital stay were markedly reduced in patients undergoing the endosurgical approach. Overall, 92% of patients undergoing the endosurgical approach and 94% of those undergoing the open approach were symptom-free or were significantly improved after a median follow-up of 27 and 48 mo, respectively. At a minimum follow-up of 5 and 10 years, most patients were asymptomatic after both procedures, except for those individuals undergoing an endosurgical procedure for a small diverticulum (< 3 cm). CONCLUSION: Both operations relieve the outflow obstruction at the pharyngoesophageal junction, indicating that cricopharyngeal myotomy has an important therapeutic role in this disease independent of the resection of the pouch and of the surgical approach. Diverticula smaller than 3 cm represent a formal contraindication to the endosurgical approach because the common wall is too short to accommodate one cartridge of staples and to allow complete division of the sphincter.

河北涞源木吉村矿田隐爆相角砾岩发育特征及其形成机制

河北涞源木吉村矿田内突出发育的隐爆相角砾岩,是该内生金属矿田的成矿同源岩体——闪长玢岩侵入晚期的产物。其形成和分布主要受成岩期构造控制。根据隐爆相角砾岩的地质发育特征将其分为四类:爆破角砾岩,震碎—震裂角砾岩、流化—侵入角砾岩、热液注入—交代角砾岩。

Seismicity of the San Francisco Volcanic Field of Northern Arizona

Seismicity in northern Arizona is concentrated in a northwest-southeast trending belt that stretches from the Utah border south to the edge of the Colorado Plateau. Located within this NASB （Northern Arizona Seismic Belt） is the San Francisco volcanic field, classified by the United States Geological Survey as potentially active. The last volcanic event in the field was located at Sunset Crater and occurred less than 1,000 years ago. Eruption intervals in the volcanic field are of the same order of length of time. Seismic monitoring of the volcanic field area has improved greatly since 1985 with the establishment of new network seismic stations. This has allowed for a lowered threshold of detection of seismic events and improved location capabilities. As an example of the result of this improved ability to locate smaller tremors, two swarms have been identified in the field, the 2009 Halloween swarm near Sunset Crater volcano and the 2011 swarm near Flagstaff, the largest urban community in northern Arizona.

Exact Localized Solutions of the Generalized （3＋1）-Dimensional Landau-Lifshitz Equation

In this paper the generalized （3＋1）-dimensional Landau-Lifshitz equation with potential is investigated. Its exact localized and topological solutions are constructed by generalizing Hirota’s method.

OBSERVATION OF THE EFFICACY OF ACUPUNCTURE AND MOXIBUSTION IN 62 CASES OF CHRONIC COLITIS

62 patients with chronic colitis were randomly divided into two groups. Acupuncture and moxibustion at acupoints such as Tianshu (St 25), Guanyuan (Ren 4) were applied in the treatment group, and western drugs were applied in the control group. The results showed that acupuncture and moxibustion had a marked curative effective with few side effects, and therefore was readily acceptable to the patients.

From Applied to Pure Science： Midwestern Geological Surveys in the 19th Century

Between 1850 and 1900, state geological surveys in the Midwest underwent an ideological shift by transforming from institutions based on applied science to those based on pure science. Three factors influenced this process： the acquisition of permanent status from state governments, the establishment of the USGS （United States Geological Survey）, and the increase in regional professional scientific societies and publications in the Midwest. These factors aided in the transformation of research projects by state geologists. These projects grew more focused, of higher quality, and increased in number during this time-period. State governments still expected Midwestern geological surveys to meet the practical needs of their respective states as this transformation continued, but surveys complemented these goals with projects more closely related to pure science. This shift encouraged the research goals of surveys to investigate projects more closely related to pure scientific pursuits, and significantly aided in the growth of the earth sciences in the nineteenth Century and early twentieth Century.

THE EFFECT OF ELECTROACUPUNCTURE ON AUDITORY P300 POTENTIAL IN MONGOLISM CASES

In treating children with mongolism(Down’s syndrome)with electroacupuncture,thelatent period of P3 is shortened,which shows that the cerebral reaction to externalstimulus in classification,encoding and recognition is accelerated.Along with the elevatedP3 amplitude,the cerebrum is more capable of processing the external information,showing improvement of the mental state.

ETHICAL ISSUES IN ELT RESEARCH:PRACTITIONER’S PERSPECTIVES

在阅读研究方法专著和国内学术期刊之后,笔者发现外语教师研究者对于科研伦理没有给予充分的关注。为了调查教师研究者对于研究对象知情权、是否采取局内人或局外人视角以及对研究素材的所属权等伦理问题的看法,笔者进行了小规模的问卷调查和半结构性访谈。结果表明大部分教师研究者对英语教学科研中的伦理问题既不关注,又没有全面的认识。

SPATIAL DISTRIBUTION PATTERN OF HOPLOPLEURA PACIFICA (ANOPLURA: HOPLOPLEURIDAE) ON ITS DOMINANT RAT HOST, RATTUS FLAVIPECTUS IN YUNNAN, CHINA

Hoplopleura pacifica is a dominant species of ectoparasitic sucking lice on the body surface of a common rat species, Rattus flavipectus in Yunan province of China. To illustrate the spatial distribution pattern of H. pacifica among the individuals of R. flavipectus, Iwao's linear regression method and a significance test of random deviation for the method were used, and a regression equation was established in the light of Iwao's method. The established equation is M*12.10+4.76M (r0.75, P<0.01) where both α and β are considerably higher than 0 and 1, the border values for determining spatial pattern of populations. The calculated F value is F6.07 (P<0.05) in the significance test of random deviation. The spatial distribution pattern of H. pacifica among the individuals of R. flavipectus is of aggregated distribution. The result suggests that the individuals of H. pacifica have a tendency to congregate together and form different individual groups instead of evenly distributing on the body surface of every rat host.

Digital Humanities Within a Global Context： Creating Borderlands of Localized Expression

As scholars have begun the digitization of the word＇s cultural materials, the understanding of what is to be digitized and how that digitization occurs remains narrowly imagined, with a distinct bias toward North American and European notions of culture, value and ownership. Humanists are well aware that cultural knowledge, aesthetic value and copyright/ownership are not monolithic, yet digital humanities work often expects the replication of narrow ideas of such. Drawing on the growing body of scholarship that situates the digital humanities in a broad global context, this paper points to areas of tension within the field and posits ways that digital humanities practitioners might resist such moves to homogenize the field. Working within the framework of border studies, the paper considers how working across national barriers might further digital humanities work. Finally, ideas of ownership and/or copyright are unique to country of origin and, as such, deserve careful attention. While open access is appealing in many digital humanities pro- jects, it is not always appropriate, as work with indigenous cultural artifacts has revealed.

Constructing entire functions with non-locally connected Julia set by quasiconformal surgery

We give an alternative way to construct an entire function with quasiconformal surgery so that all its Fatou components are quasi-disks but the Julia set is non-locally connected.

Outcomes in children with Clostridium difficile infection:results from a nationwide survey

Objective:Hospital-and population-based studies demonstrate an increasing incidence of Clostridium difficile infection(CDI)in adults and children;although pediatric CDI outcomes are incompletely understood.We analysed United States National Hospital Discharge Survey(NHDS)data to study CDI in hospitalized children.Methods:NHDS data for 2005–2009(demographics,diagnoses and discharge status)were obtained;cases and comorbidities were identified using ICD-9 codes.Weighted univariate and multivariate analyses were performed to ascertain incidence of CDI;associations between CDI and outcomes[length of stay(LOS),colectomy,all-cause in-hospital mortality and discharge to a care facility(DTCF)].Results:Of an estimated 13.8 million pediatric inpatients;46176 had CDI;median age was 3 years;overall incidence was 33.5/10000 hospitalizations.The annual frequency of CDI did not vary from 2005 to 2009(0.24–0.43%;P=0.64).On univariate analyses,children with CDI had a longer median LOS(6 vs 2 days),higher rates of colectomy[odds ratio(OR)2.0;95%confidence interval(CI)1.7–2.4],mortality(OR 2.5;95% CI 2.3–2.7),and DTCF(OR 1.6;95% CI 1.6–1.7)(all P<0.0001).After adjusting for age,sex and comorbidities,CDI was an independent and the strongest predictor of increased LOS(adjusted mean difference,6.4 days;95% CI 5.4–7.4),higher rates of colectomy(OR 2.1;95% CI 1.8–2.5),mortality(OR 2.3;95% CI 2.2–2.5),and DTCF(OR 1.7;95% CI 1.6–1.8)(all P<0.0001).On excluding infants from the analysis,children with CDI had higher rates of mortality,DTCF and longer LOS than children without CDI.Conclusions:Despite increased awareness and advancements in management,CDI remains a significant problem and is associated with increased LOS,colectomy,in-hospital mortality and DTCF in hospitalized children.

Science Letters:Finite time-horizon Markov model for IEEE 802.11e

We model wireless local area network channel utilization over a finite interval through a finite time-horizon Markov(FTHM) model.By accurately capturing time-varying utilization,the FTHM model allows for generally distributed transmis-sion-opportunity(TXOP) duration,which most existing models do not account for.An absorbing state is introduced to limit the lifetime of the counting process,resulting in a non-ergodic Markov chain that is solved via transient analysis.The model predic-tions for time-varying utilization are validated by simulation with errors of no more than 0.1% after eight beacon intervals.Moreover,we show that the FTHM model prediction error is below 4% for Poisson distributed and uniformly distributed TXOP durations.