共查询到20条相似文献，搜索用时 31 毫秒
1.
ＩＮＴＲＯＤＵＣＴＩＯＮＴｒａｄｉｔｉｏｎａｌｓｉｌｋｐｒｏｄｕｃｔｓｅｘｐｏｒｔｆｒｏｍＣｈｉｎａｄｏｍｉｎａｔｅｗｏｒｌｄｓｉｌｋｍａｒｋｅｔｓ;ｔｏｔａｌｅｄ 4 2 .2ｂｉｌ ｌｉｏｎＵＳ＄ｄｕｒｉｎｇ 1 950 -1 998;ａｎｄｈａｖｅａｓｉｇ ｎｉｆｉｃａｎｔｒｏｌｅｉｎＣｈｉｎａ’ｓｆｏｒｅｉｇｎｔｒａｄｅａｎｄｎａｔｉｏｎ ａｌｅｃｏｎｏｍｉｃｓ.ＡｆｔｅｒＣｈｉｎａ’ｓｄｅｖｅｌｏｐｍｅｎｔｏｆｓｅｒｉｃｕｌｔｕｒｅｔｅｃｈｎｉｑｕｅｓａｎｄｔｈｅｅｘｐａｎｓｉｏｎｏｆｐｒｏ ｄｕｃｔｉｏｎｓｃ… 相似文献
2.
江维国 《南宁职业技术学院学报》2011,(5):26-29
中国—东盟自由贸易区(CAFTA)正式成立,贸易和投资成为了中国与东盟十国互利往来的重要领域,广西作为中国—东盟贸易区的桥头堡,将迎来历史性的发展机遇。在国家"东桑西移"工程推动下,广西蚕丝绸业的种桑、制种、养蚕、制茧等环节实现了跨越式发展,积蓄了一定的产业前端优势。为解决广西茧丝绸业存在的问题,提出了CAFTA背景下广西茧丝绸业发展策略:开放思想、突出重点、打造拳头产业;加快国内产业承接,深化加工,突围同质竞争;以人为本,实行品牌兴业,坚持两条腿走路。 相似文献
3.
郭薇 《江苏经贸职业技术学院学报》2012,(5):12-14
在当今国际贸易形势和国家"东桑西移"的政策背景下,传统茧丝绸产业面临着新的挑战。明确茧丝绸业"苏南模式"的新内涵和存在的必要性,正视老蚕区在产业结构调整过程中暴露的劳动力不足、茧丝原材料质量下降等诸多"短板",深入探讨苏南老蚕区茧丝绸产业链转型升级发展的相关对策,具有十分重要的历史意义。 相似文献
4.
江维国 《张家口职业技术学院学报》2011,24(2):4-7
产业转移作为一种生产要素的空间转移方式,实现了资源在不同区域间的重新配置。我国沿海发达地区传统产业在土地、交通、环境以及劳动力成本的压力下,正在加速向中西部转移。茧丝绸业作为典型的传统产业,转移也是首当其冲。在国家"东桑西移"工程推动下,广西种桑、制种、养蚕、制茧等环节实现了跨越式发展,积蓄了一定的产业前端优势。广西应该分析沿海茧丝绸业转移的内在规律,立足区位、原材料优势,主动有效地承接产业转移,尽快从蚕桑大区蜕变成茧丝绸业强区。 相似文献
5.
大葱覆盖栽培可降低耕作层土壤温度,提高土壤含水量,使单位面积的产量增加21．9%,单株假茎提高了26．4%,其次是代表大葱质量的假茎高、假茎粗也分别提高了17．4%和25．7%． 相似文献
6.
刘青利 《安阳师范学院学报》2014,(2):63-66
采用广义灰色关联矩阵优势分析方法对河南省1990-2012年间的粮食总产量和粮食单产及其影响因素进行了分析。结果表明：粮食总产量和粮食单产受各相关因素的综合影响基本一致,说明河南省粮食总产量的增产主要依靠粮食单产的提高;而农田有效灌溉面积、化肥施用量和农用机械总动力是提高粮食单产的主控因素,应发展有机化肥逐步形成农田生态系统的良性循环;同时应严格执行耕地保护政策,确保粮食播种面积。 相似文献
7.
银行房屋抵押贷款数据中有两个重要指标,权利价值和贷款金额.根据实际房贷数据,用单位贷款金额和单位权利价值建立一个线性回归模型.使用高杠杆值对模型进行分析诊断,探测出数据中的强影响点后,再建立一个改良模型.最后根据统计分析结果对银行房贷工作提出合理化建议. 相似文献
8.
华小全 《淮南师范学院学报》2013,(6):27-31
运用LMDI方法对我国2003-2011年粮食增产进行因素分解,结果表明：全国绝大多数省份都实现了粮食产量的稳定增长,影响全国粮食生产的四个因素中,耕地面积减少为负向作用,复种指数的提升、粮食种植比例的增加和粮食单产的提高均对粮食增产起正向影响,这其中粮食单产的提高贡献最高,粮食种植比例的增加贡献最小.因此,改善农田的生产条件、鼓励对农田进行长期投资和利用国际粮食市场是破解我国粮食安全难题的主体思路. 相似文献
9.
Implementation of ecological migration (eco-migration) policies may improve the fragile ecological environment of emigration areas; however, it also places enormous pressure on the human-environment systems in immigrant resettlement regions. Via the application of participatory rural appraisal (PRA) methods, ecological footprint (EF), and stochastic impacts by regression on population, affluence, and technology (STIRPAT) models, 21 villages of Huanjiang County in Guangxi Zhuang Autonomous Region, China were used in this research as a case study area for the environmental appraisal of eco-migration policies in immigrant resettlement regions. Results show: (1) In the past 20 years of implementing eco-migration policies, the EF per capita constantly increased, the biocapacity (BC) per capita constantly decreased, and the ecological deficit gradually increased, indicating an extremely negative impact of eco-migration projects on the ecological environment in the immigration areas. (2) Cropland and forest land are the most important components of the per-capita EF. The per-capita EF of cropland experienced overall a first increasing and then decreasing trend, and the per-capita EF of forest land constantly increased and showed the most rapid increase among all types of EF in the last two decades. (3) The proportion of per-capita EF of different types of productive land is in the order of forest land > cropland > carbon uptake land > built-up land > grazing land from high to low, and this is a significant change from the original order of cropland > forest land > carbon uptake land > grazing land > built-up land. (4) Because of unequal possession of ecologically productive resources, the overall per-capita EF, overall per-capita BC, overall per-capita ecological deficit of productive land use by migrants, and their component values of different types of productive land use are all lower than the corresponding values of the natives. The ecological deficit of natives is more severe than that of migrants. (5) Whereas population growth and overexploitation of resources lead directly to the increased pressure on the ecological environment in the immigration areas, increasing nonagricultural income and improving the consumption structure can reduce the dependence of farmers on the land, thus inhibiting the increase of EF. 相似文献
10.
严玉奇 《江苏广播电视大学学报》2006,17(2):83-86
Kyd land和Prescott以及Barro和Gordon对央行货币政策都有深入细致的研究,以这些研究为基础,在比较稳定产出型和相机抉择型两种情况对央行目标函数的不同影响后,得出结论:短期内相机抉择能带来益处,长期内则不一定;公众的理性预期水平高低及变化对于货币政策的选择产生重大影响;我国货币政策方式的选择应考虑市场机制、预期水平、产出水平、经济文化发展水平等因素。 相似文献
11.
A 21-day laboratory incubation experiment was conducted to investigate the impact of pesticides (insecticide, herbicide, fungicide)
on paddy field soil health under controlled moisture (flooded soil) and temperature (25°C) environment. The electron transport
system (ETS)/Dehydrogenase activity showed negative correlation with pesticides concentrations, decreased with increase of
pesticide concentration. The higher doses (5 to 10 times field rates) of pesticides significantly inhibited ETS activity,
while lower rates failed to produce any significant reducing effect on the control. The toxicity of pesticides in decreasing
the ETS activity was in the order: insecticide > fungicide > herbicide, irrespective of their rates of application. The pesticides
increased the soil phenol content, which increased with increasing concentration of agrochemicals. The pesticide application
did not produce any significant change in soil protein content. The response of biomass phospholipid content was nearly similar
to that of ETS activity. The phospholipid content decreased with the addition of pesticides in the order insecticide > fungicide
> herbicide and the toxicity was in the order: 10 FR (field rate) > 5 FR > 1.0 FR > 0.5 FR > control.
Project (No. G1999011809) supported by the National Key Basic Research Foundation (973) of China
Ph. D. student at Zhejiang University, from Ministry of Agriculture (Punjab), Government of Pakistan 相似文献
12.
徐辉艳 《陕西教育学院学报》2010,26(2):111-113
以桑葚为主要原料,以酿酒活性干酵母为桑葚酒发酵菌种,通过正交试验的研究,可以确定桑葚酒发酵的最佳工艺参数为：总糖含量22％、发酵温度28℃、接种量0．1％、SO2添加量40ppm。影响桑葚酒发酵因素的主次顺序为总糖含量（A）〉发酵温度（B）〉接种量（C）〉SO2添加量（D）,桑葚酒具有多种生物活性成分,是一种值得开发的果酒。 相似文献
13.
本试验研究了乙烯利浸种对生姜增产的效应。结果表明,200～400PPm乙烯利浸种能提高生姜出苗率,使植株增高,增多分枝数,增大叶面积,并比对照增加产量20.3％～33.0％。 相似文献
14.
Two silkworm strains viz, B20 Λ (high cocoon shell ratio) and C. Nichi (low cocoon shell ratio) were sib mated for 10 generations to determine the homozygosis. Both bulked segregant analysis (BSA) and near isogenic lines (NIL) studies were done to identify the RFLP markers closely linked to cocoon shell parameters. Three hundred and fifty-two random clones were identified as the low copy number sequence and used for identification of Restriction Fragment Length Polymorphic (RFLP) marker linked to cocoon weight and cocoon shell character. In the bulk segregant analysis>DNA from the parents (B20 Λ C. Nichi), F1 and F2 progeny of high shell ratio (HSR) and low shell ratio (LSR) were screened for hybridization with the random clones. Polymorphic banding pattern achieved through southern hybridization with different probes indicated the probable correlation of polymorphism with high and low cocoon shell character which are possible landmarks in identifying the putative marker(s) for the cocoon shell character. Out of the 100 probes tried with parents, F1, F2 and their bulks, 10 probes were found to be closely linked to cocoon shell characters. 相似文献
15.
在高肥力条件下,不同预留行宽度对冬小麦边际效应影响显著。边１行增产幅度随预留行宽度增加而提高,但超过一定宽度后,增产幅度减小;预留行宽度增加,边２行增产不稳定;边２行比内行增产３．２８％～１２．０１％,平均增产６．８４％。不同处理的内行产量差异不显著,预留行宽度增加,内行平均增产仅为５％。不同处理小区产量差异显著,随预留行宽度增加,小区产量递增。边行增产原因是穗数、穗粒数显著提高,同时千粒重明显提高。百农６４适宜间套作预留行宽度为不低于８０ｃｍ。 相似文献
16.
Marion Dresner Corinne Handelman Steven Braun Gretchen Rollwagen-Bollens 《Environmental Education Research》2015,21(7):991-1010
We conducted surveys of adults participating in municipally sponsored volunteer events in the Portland, OR metropolitan area in order to understand the range of attitudes and behaviors associated with volunteer work. We sampled 172 individuals in 18 events from February to June 2012. Principal components and factor analyses of survey responses identified three groups based on annual frequency of participation in stewardship events: first-time volunteers, mid-level volunteers (3–10 events per year), and frequent volunteers (>10 events per year). Our analyses revealed three main factors that explained the variation in survey response for the three volunteer groups: environmental identity, private pro-environmental behavior, and civic engagement. All three factors were positively correlated with frequency of participation in stewardship events, with the most frequent volunteers indicating the highest degree of attention to environmental issues, environmental identity, and self-reported pro-environmental behaviors. Frequent volunteers were more likely to feel personally attached to their local environment, believe that their efforts help solve environmental problems, and enjoy being part of community efforts. These results suggest that stewardship activities provide opportunities for volunteers to interact with others while working collectively toward restoring and maintaining parks, which may contribute to more resilient communities. 相似文献
17.
教育服务产出核算分析 总被引：2，自引：0，他引：2
教育服务产出是服务核算中的一个重要部分。本讨论教育服务的定义和服务产出的数量单位，研究教育服务的核算范围和计算教育服务产出价值的方法，以及教育服务的质量调整问题。最后，举例使用产出指标方法计算教育产出。 相似文献
18.
沼液在柑桔和蔬菜上的应用效果初探 总被引：1，自引：0，他引：1
沼液作为沼气的附产品,应用到农林作物上,有很明显的效果。初步试验表明:使用沼液可以明显提高椪柑的固形物含量和甘蓝的产量,从肥效上看,可以代替一部分化肥,降低生产成本,因此值得在柑桔和蔬菜上广泛应用。 相似文献
19.
Stephanie Lem Kathy Baert Eva Ceulemans Patrick Onghena Lieven Verschaffel Wim Van Dooren 《教育心理学》2017,37(10):1281-1300
The ability to interpret graphs is highly important in modern society, but has proven to be a challenge for many people. In this paper, two teaching methods were used to remediate one specific misinterpretation: the area misinterpretation of box plots. First, we used refutational text to explicitly state and invalidate the area misinterpretation of box plots. Second, we used multiple external representations (MERs): Histograms were used as an overlay on box plots in order to give students a better insight in the way box plots represent data distributions. Third, we combined refutational text and MERs. We found that refutational text was successful in improving students’ interpretation of box plots, but that the use of MERs did not improve students’ interpretation of box plots. The addition of MERs also did not increase the effect of refutational text. 相似文献
20.
加大语言输入注重语言输出 总被引：1，自引：0，他引：1
在中国,学习英语极为缺乏真实、自然的语言环境,学习者少有机会接触英语为本族语的人,加之教学方法等因素的影响,使得学习者的语言输入量严重不足,并由此导致语言输出及至语言应用能力的薄弱。为此本文提出在英语教学过程中,应加大语言输入,让学生尽可能多接触英语;同时,注重语言输出,提供大量使用语言的实践机会,使学生在应用语言的过程中学习语言,并最终提高英语语言应用能力。 相似文献