基于PDA的公交信息数据库设计与查询算法

设计了一个基于PDA的、移动的公交信息数据库并描述了四种面向不同需要的公交信息查询方式及相应的算法。除了提供三种传统的公交查询方式外，还系统提供了以设备持有者为当前所处位置为中心的、公交线路信息的查询。     

THE SOUTHERN HEMISPHERE MID-LATITUDE QUASI-40-DAY PERIODIC OSCILLATION WITH ITS EFFECT ON THE NORTHERN HEMISPHERE SUMMER MONSOON CIRCULATION

By using the method of power spectrum combined with band-pass filtering with May—September1982 grid data from ECMWF,the spatial structure and propagation characteristics are tentatively examinedof the SH (Southern Hemisphere) mid-latitude quasi-40-day (ranging from 30—60 days) periodic oscilla-tion (QPO) together with the relation to NH (Northern Hemisphere) summer monsoon,with the result thatthere exists similar periodicity in the development of baroclinicity and activities of cold air at the same latitudes,and in response to this the zonal wind shows profound QPO with a nearly vertical axis of disturbance and thatthe air activities can act as periodic external forcing for the monsoon,which intensifies the west wind on thesouth side of the Mascarene or Australian high,and then the system itself,leading to the reinforcement of theSE trade wind on the north side,followed by the strengthening of cross-equatorial flow that,in turn,causesactive monsoon with its northward march over the eastern part of China.The process is responsible for thelow-frequency oscillation propagated in a meridional direction,which confirms the speculation of theauthor.     

YF-01捕收剂在内蒙古×××萤石矿的应用

经过大量的浮选捕收剂的试验研究工作,研制出的新型萤石浮选YF-01捕收剂。应用于内蒙古×××萤石矿工业生产,基本上实现了常温、或者少量加温浮选。该捕收剂还具有无毒、无害,不会对环境造成污染等优点,效益显著。     

Impacts of climate change on cotton yield in China from 1961 to 2010 based on provincial data

To develop scientific countermeasures,the impacts of climate change on cotton yield during 1961-2010in three major cotton-producing regions of China were studied by using the available provincial data.The results indicate that(1)a rise in average temperature increased the cotton yield in most provinces of Northwest China and the Yellow River valley;however,the rise in average temperature decreased the cotton yield in the Yangtze River valley.Moreover,cotton production across the entire study region was reduced by approximately 0.1%relative to the average during 1961-2010.(2)A decrease in diurnal temperature range(DTR)reduced cotton yield in some provinces,while a beneficial DTR effect was observed in the other provinces.Changes in DTR resulted in an average decrease in production by approximatly 5.5%across the entire study region.(3)A change in the amount of precipitation increased the cotton yield in some provinces;however,it caused a decrease in other provinces.The decrease in average production due to the change in precipitation was approximately 1.1%.We concluded that the changes in temperature and precipitation decreased cotton yields in China,while beneficial effects of temperature and precipitation existed in the cotton-growing regions of Northwest China during 1961-2010.     

Effects of different land use types on potential evapotranspiration in the Beijing-Tianjin-Hebei region,North China

Journal of Geographical Sciences - Potential evapotranspiration (ET0) is vital for hydrologic cycle and water resource assessments as well as crop water requirement and irrigation demand...     

Ⅲ～Ⅳ期糖尿病肾病不同中医证型的血清蛋白组学研究

目的：探索Ⅲ～Ⅳ期糖尿病肾病（DN）患者血清差异蛋白,同时筛选不同中医证型的血清差异蛋白。方法：收集Ⅲ～Ⅳ期DN患者70例（气阴两虚证19例,脾肾气虚证18例,血瘀证16例,湿热证17例）,同时选择健康受试者35例（健康对照组）,应用表面加强激光解吸电离-飞行时间-质谱（SELDI-TOF-MS）技术检测各组血清蛋白指纹图谱,并对差异蛋白峰进行对比分析。结果：1）DN组与健康对照组之间共有9个蛋白峰存在显著差异,质荷比（M/Z）分别为2042.57、3291.28、4986.15、5312.69、5564.09、9861.47、10786.53、13392.89、17395.27;2）气阴两虚证与脾肾气虚证之间共有4个蛋白峰存在显著差异,M/Z分别为2994.77、4986.15、7937.25、2758.91;3）气阴两虚证与血瘀证之间共有4个蛋白峰存在显著差异,M/Z分别为4986.15、16982.62、6819.69、9947.36;4）气阴两虚证与湿热证之间共有3个蛋白峰存在显著差异,M/Z分别为4986.15、11741.33、7001.54;5）脾肾气虚证与血瘀证之间共有3个蛋白峰存在显著差异,M/Z分别为3448.22、8063.43、9787.21;6）脾肾气虚证与湿热证之间共有5个蛋白峰存在显著差异,M/Z分别为2144.34、3992.01、8871.35、10568.32、14643.47;7）血瘀证与湿热证之间共有6个蛋白峰存在显著差异,M/Z分别为4233.15、5771.32、5987.18、8496.76、6651.25、13551.94。结论：Ⅲ～Ⅳ期DN组与健康对照组血清蛋白表达存在差异,该差异或可作为相关临床诊断的标志物,对探索DN的发病机制具有重要的参考价值;在不同中医证型之间能够找到差异血清蛋白,可能反映“证”的实质内涵,对今后建立诊断决策模型具有积极意义。     

当归四逆汤合辛桂温通酊治疗局限性硬皮病35例临床观察

目的：观察当归四逆汤合辛桂温通酊治疗局限性硬皮病的临床疗效。方法：将70例局限性硬皮病患者随机分为对照组和治疗组,每组各35例。对照组采用辛桂温通酊治疗,治疗组在对照组基础上加用当归四逆汤治疗。结果：总有效率治疗组为88.57%,对照组为65.71%,组间比较,差异有统计学意义（P＜0.05）;2组皮损积分治疗前后组内比较及治疗后组间比较,差异均有统计学意义（P＜0.05）。结论：当归四逆汤合辛桂温通酊治疗局限性硬皮病有较好的临床疗效。     

分布式栅格空间数据库引擎设计与实现

栅格空间数据库引擎RasSDE是实现海量栅格数据的分布式查询和高效管理的关键。提出一种面向对象的栅格空间数据组织模型,设计了分布式四层RasSDE的体系结构,分析了数据库服务层、应用接口层、应用层等相关技术,讨论了RasSDE核心组件OMSAC开放多数据源空间数据访问组件的架构,给出了基于RasSDE的中国海监飞机扫描仪图像处理及三维仿真平台应用系统实例,系统实现面向对象的栅格空间数据组织、统一的海量栅格空间数据管理以及分布式栅格空间数据计算等主要目标。对RasSDE和ArcSDE的磁盘读写、网络传输综合性能对比试验表明,RasSDE的栅格数据网络传输效率比ArcSDE的要高,可以满足海量栅格空间数据传输的要求。     

铜绿微囊藻和斜生栅藻生物光学模型

选取太湖"水华"优势藻类即蓝藻门中的铜绿微囊藻和绿藻门中的斜生栅藻作为研究对象,利用AC-S分别测量两种纯藻的吸收系数和散射系数对铜绿微囊藻和斜生栅藻的固有光学属性进行定性和定量分析,并建立其生物光学模型.结果表明:铜绿微囊藻的藻红蛋白吸收带和斜生栅藻的藻蓝蛋白吸收带的光谱吸收特性的差异性较为明显;粒径相对较小的铜绿微囊藻的包裹效应、吸收系数对散射系数的影响程度要明显小于粒径较大的斜生栅藻,铜绿微囊藻吸收系数的P-L模型的线性斜率和幂指数要大于斜生栅藻的吸收系数模型系数;由于散射系数受吸收系数影响程度的不同,使得散射系数光学模型变量因子具有一定的差异,受吸收系数影响较小的铜绿微囊藻的变量因子为波段比值λ_0/λ,λ_0为参考波长,而受吸收系数影响较大的斜生栅藻的变量因子为吸收系数比值a(λ_0)/a(λ),a(λ_0)为参考波段吸收系数,a(λ)为波长为λ的吸收系数,两种藻类的散射模型都符合国际上通用的S-P模型形式.     

鄱阳湖流域赣江(南昌段)沉积物磷赋存形态特征及释放风险分析

本研究采用化学连续提取法,分析赣江南昌段表层沉积物磷赋存形态特征及其生物有效性,并通过等温吸附实验探讨了沉积物磷释放风险。结果显示:赣江南昌段表层沉积物总磷(TP)含量范围为235.21~702.24 mg/kg,均值为522.93 mg/kg,具有较高的空间异质性。所有采样点位中无机磷(IP)均以闭蓄态磷(Oc-P)为主要赋存形态,各形态无机磷含量特征表现为:Oc-P>铁结合态磷(Fe-P)> 碎屑钙磷(De-P)> 自生钙磷(ACa-P)> 可交换态磷(Ex-P)> 铝结合态磷(Al-P);有机磷(OP)以残渣态有机磷(Res-P_o)为主要赋存形态,按活性划分表现为:非活性有机磷(NOP)> 中活性有机磷(MLOP)> 活性有机磷(LOP)。生物有效磷(BAP)含量范围为61.59~218.27 mg/kg,占TP含量的比例为27.07%。BAP总量及占TP的比例均处于较低水平,沉积物内源磷释放风险较低。BAP中Fe-P平均占比为56.72%,表明沉积物磷潜在释放风险主要来源于Fe-P。TP、Fe-P和De-P之间均存在显著相关关系,表明外源输入可能是赣江沉积物磷的主要来源。采样期间赣江南昌段沉积物磷平衡浓度(EPC₀)高于上覆水溶解性活性磷(SRP)浓度,磷吸附饱和度(DPS)均低于沉积物磷大量流失的临界值25%,表明此阶段沉积物磷虽作为上覆水的“磷源”,但出现大量释磷的可能性不高。因此,沉积物内源磷释放引起赣江水体富营养化的风险不高,这意味着赣江水体应更多关注外源输入问题。本研究结果为赣江南昌段水环境的科学管理提供了数据支撑和科学依据。