在职知识分子2型糖尿病的危险因素分析

目的观察余姚地区在职中级以上知识分子糖尿病的主要危险因素,为中年人群制订预防和干预措施提供依据。方法通过2004年9至11月对全市在职中级以上知识分子进行糖尿病调查,对可能的危险因素进行单因素分析和多因素非条件Logistic回归分析。结果采用单因素非条件Logistic回归分析方法,表明体重指数,腰臀比,腰围,收缩压,高血压病史,糖尿病家族史,甘油三酯7个因素与糖尿病有显著性相关(P<0.05);采用多因素非条件Logistic回归分析表明,腰围,收缩压,糖尿病家族史,年龄,甘油三酯,腰臀比与2型糖尿病有显著性相关(P<0.05)。结论在临床工作和预防工作中,纠正不良的生活方式,防止肥胖,控制血压,调节血脂是降低糖尿病发病率,改善糖尿病症状,控制其并发症的发生和延缓其进展的重要措施。

织物动态悬垂性的研究

以旋转悬垂体来表现织物动态悬垂性为依据,设计了相应的测试系统。结合理论对悬垂体受力情况的分析,作了试验结果的形态和物理两方面的解释。

Agricultural Input and Output in Jiangsu Province with Case Analysis

[Objective] The aim was to explore interrelationship between agricultural input and output in Jiangsu and the influence degrees of input factors on agricultur-al output. [Method] Quantitative analysis and evaluation were made on agricultural input and output in Jiangsu during 1990-2012 as per factor analysis and regression analysis. [Result] The result of factor analysis showed that since the 1990s, the comprehensive efficiency of agricultural input/output in Jiangsu was growing and in-put/output of agriculture, forestry, animal husbandry and fishery, crop farming, and of food production were extracted, whose scores reflect the changes of input/output ef-ficiencies in terms of agriculture, forestry, animal husbandry, fishery, crop farming and food production in the two decades. The results of regression analysis indicated that the effects of the three indices on agricultural output tended to be volatile and the influence degrees were concluded also by regression parameters. [Conclusion] The research provides theoretical references for agricultural input/output structure in Jiangsu Province.

肥料三要素对六龄参根产量影响的数量分析

本文针对长白山区低肥力白浆土壤，在三因素五水平最优回归设计田间试验的基础上，应用多元统计分析的方法，建立了氮磷钾三种肥料对六龄参根产量影响的肥料效应数学模型。通过对此模型的数学分析，得知氮磷钾三种肥料对六龄参根的产量均有显著影响。其综合增产效应依次为NK＞N＞K＞P，而三种肥料的线性增产效应依次为N＞K＞P。当三种肥料在一定条件下单独使用时，其增产效应依次为N＞K＞P。同时确定了最高产量施肥量和最大利润施肥量，由等产线确定了合理施肥区。

Logistic Regression Analysis of Syndrome Essential Factors in Patients with Unstable Angina Pectoris

Objective: To explore the correlation between common syndrome essential factors and the symptoms and signs of unstable angina (UA). Methods: Eight hundred and fifteen patients with UA confirmed by coronary angiography were identified from several centers. Common syndrome essential factors were selected on the basis of expert experience. The correlations between common syndrome essential factors and symptoms and signs of UA were analyzed using binary logistic regression analysis. Results: The common syndrome essential factors in unstable angina were blood stasis, qi stagnation, phlegm turbidity, heat stagnancy, qi deficiency, yin deficiency, and yang deficiency. Symptoms such as chest pain, hypochondriac distention, ecchymosis, dark orbits, dark and purplish tongue, and tongue with ecchymosis and petechiae were significant diagnostic features of "blood stasis". Aversion to cold and cool limbs, weakness in the waist and knees, and clear abundant urine were significant diagnostic features of "yang deficiency". These results were in accordance with the understanding of traditional clinical Chinese medical practice. Conclusion: This clinical study analyzed the correlations between common syndrome essential factors and the symptoms and signs of unstable angina. The results provide the basis for establishing diagnostic criteria for syndrome essential factors.

Acceptability of Contraceptives in Young Couples

Based on the data from the survey of 7826 young couples in two districts of shanghai, we analyzed the acceptability of oral pill, IUD, condom and injection in women. The results showed that 63.4% of subjects were unwilling to use pill and 5.7% were unwilling to use injection, mainly for the reasons that the pill was 'harmful to health' and the 'cause of obesity', 8.7% of subjects were unwilling to use IUD, mainly for the reasons of the 'cause of menorrhagia or spotting' and 'being easy to fail', 6.2% of subjects were unwilling to use condom, mainly for the reasons of 'interference with intercourse' and 'inconvenience in use'. The most important source of getting the information was 'heard from person's talking'.Simple variate and Logistic analysis showed that women's age at marriage, education, occupation, contraceptive knowledge score, history of using the contraceptives,some women's traits etc. affected the acceptability of the contraceptives. The study implies that it is necessary to strengthen provision of contraceptive knowledge for young couples and to make them have correct understanding of the side effects of contraceptives for improving family planning program.

Regional differences of urbanization in China and its driving factors

After more than 30 years of rapid urbanization, the overall urbanization rate of China reached 56.1% in 2015.However, despite China's rapid increase in its overall rate of urbanization, clear regional differences can be observed. Furthermore, inadequate research has been devoted to in-depth exploration of the regional differences in China's urbanization from a national perspective, as well as the internal factors that drive these differences. Using prefecture-level administrative units in China as the main research subject, this study illustrates the regional differences in urbanization by categorizing the divisions into four types based on their urbanization ratio and speed(high level: low speed; high level: high speed; low level: high speed; and low level: low speed). Next, we selected seven economic and geographic indicators and applied an ordered logit model to explore the driving factors of the regional differences in urbanization. A multiple linear regression model was then adopted to analyze the different impacts of these driving factors on regions with different urbanization types. The results showed that the regional differences in urbanization were significantly correlated to per capita GDP, industry location quotients, urban-rural income ratio,and time distance to major centers. In addition, with each type of urbanization, these factors were found to have a different driving effect. Specifically, the driving effect of per capita GDP and industry location quotients presented a marginally decreasing trend, while main road density appeared to have a more significant impact on cities with lower urbanization rates.

Correlation analysis of three influencing factors and the dust production rate for a free-falling particle stream

The effects of three factors （i.e., drop height h, hopper outlet diameter do, and material temperature T] on the dust generation rate derived from a free falling particle stream were investigated via filll factorial experiments. The correlation between the three factors and dust generation rate was also analysed. Results show that Tand h affect the first fugitive dust rate largely, whereas the second fugitive dust rate is mainly dominated by h and do. Through analysing the first fugitive dust percentage data, it is found that h and T should be considered first for higher temperatures and lower flow rates, whereas h and do can be considered under contrasting conditions, and h should be controlled in the remaining two sets of conditions. Relationships between the influencing factors and total and first fugitive dust rates were developed via multiple regression to quantify the dust emission rates for different contact surfaces （rigid or water）.

江西千烟洲木荷液流特征及其与气象因子的关系

采用Granier热扩散式探针对江西千烟洲木荷（Schimasuperba）树干液流速率进行连续监测，并对气象因子进行同步测定。结果表明：不同天气条件下木荷树干液流速率日变化规律存在差异，晴天为宽峰型曲线，阴天为单峰型曲线，雨天无明显的变化规律。不同月份木荷树干液流速率大小以及液流启动、达到峰值的时间不同。各月平均液流速率（cm／s）大小关系依次为7月（0．001663）〉8月（0．00156）〉6月（0．001472）〉9月（0．001314）〉5月（0．001216）〉4月（0．001101）〉10月（0．000847）。6月液流启动时间最早，5、7、8、9月均推迟0．5～1h，4、10月最迟。7月液流最早达到峰值，5、6、8月次之，9、10月最迟。液流启动和达到峰值均滞后太阳辐射1h，而与冠层温度、相对湿度不存在明显的时滞效应。包含与不包含时滞效应的方差分析结果表明，液流速率与相对湿度呈显著负相关，与平均净辐射呈显著正相关，与冠层温度相关性较弱。气象因子对木荷液流速率的影响程度依次为平均净辐射（o．677＊＊）〉冠层相对湿度（-0．417＊＊）〉冠层温度（0．088）和平均净辐射（0．752＊＊）〉冠层相对湿度（-0．325＊＊）〉冠层温度（0．158）。建立液流速率与气象因子的多元线性回归方程，回归方程和回归系数的相关性检验均达到极显著水平。回归方程的拟合效果均良好，决定系数分别达到0．93和0．95。